Pay attention to the suitability of choosing ppe

What is P2C technology

P2C technology, also known as power pulse communication and control technology, is a new type of non-carrier power line communication technology. It uses an AC power supply line as a communication transmission carrier, and uses AC half-wave pulses as a signal source for communication, through the exchange of The on-time of the half-wave pulse is controlled according to a specific coding method so as to realize the transmission of data information. In simple terms, the combination of the conventional thyristor dimming clip pulses at different brightness levels is used as the basic signal for information transmission and is provided directly to the power device that can decode this combination of pulses through the power line. While it is supplying power, it also passes control information.

220VAC half-wave conduction angle clipping pulse signal

P2C technology belongs to low-rate, short-data, high-reliability and low-غير مجاز مي باشدt communication technologies. It is suitable for lighting switches and home appliances. The power switches, simple adjustments, and basic controls require low transmission speed and bandwidth while achieving reliability and reliability. Real-time requirements higher control and connection.

Compared with the long-established power line carrier communication technology, P2C technology has higher reliability, more distant transmission distance, lower product غير مجاز مي باشدt and simpler application development. Compared with various wireless connection technologies currently used in many applications, P2C technology has the obvious advantage of being free from blocking by walls, no high-frequency radiation, and large signal and high anti-interference.

P2C technology is part of China's Smart Home Industry Alliance (CSHIA) Control Free program and is the first hardware open source interconnection and interoperability technology standard. P2C technology has full Chinese independent intellectual property rights, and its core patented technology is shared for free by the member units of the alliance. It is the basic connection technology of the smart home industry, especially for the popular applications of lighting control, intelligent lamps, smart home appliances and super switches. , is a key technology of a landmark nature.

The P2C technology was developed and promoted by the P2C Working Group of China Smart Home Industry Alliance (CSHIA). The working group was formally established in July 2015 in Jiaxing University, Zhejiang. Sponsored and joined companies include Shenzhen Botu Kangzhuo Intelligent Technology Co., Ltd. and Xiamen. ABB Zhenwei Electrical Equipment Co., Ltd., Zhejiang Zhengtai Electric Co., Ltd., Zhejiang Dahua Technology Co., Ltd., Guangdong Reid Intelligent Technology Co., Ltd., Shanghai Op Lighting Co., Ltd., Ningbo Duya Electromechanical Co., Ltd., Beijing Tiancheng Xinyu In April 2016, companies such as Science and Technology Co., Ltd. formally launched the P2C1.0 version of the protocol standard based on lighting control.

Application Features of P2C Technology

The most prominent application feature of P2C technology is that all smart devices fully implement high-reliability and low-غير مجاز مي باشدt wiring-free installation, that is, any product that adopts P2C technology, such as smart lighting, smart appliances, super switches, etc. Under the premise of any wiring, it is only necessary to access the 220VAC commercial power to automatically realize interconnection. For example, a traditional wall switch that replaces the super switch directly, or replaces the smart lamp directly with the original ordinary lamp, or inserts the smart home appliance into the 220VAC outlet, or installs the gateway control device directly on the rail of the distribution box, etc. It can realize the automatic connection of switch panel, intelligent lamps, smart home appliances and local area network.

Another characteristic application of the P2C technology is auxiliary control. For example, non-information control such as turning on/off of the Wi-Fi camera, panning of the pan/tilt, and alarm linkage can be excluded from the limitation of the Wi-Fi communication itself. P2C technology can also be used to implement multi-channel wireless communications equipment, channel switching, routing control and energy management.

Super switch

The super switch is one of the typical application cases of P2C technology. Its biggest application advantage lies in the realization of a complete high-power single-fire power supply and a bus bracket that provides a single lamp multi-functional combination panel, on the one hand to overcome the industry's unsolvable single FireWire switch leakage current, on the other hand, also provides a basic platform for installation, power supply and interconnection for various smart single product devices.

No matter how much power (0~200W) it is connected to and controlled by the super switch, it can be turned on or off, and it can achieve large current (>1A5VDC) output of the switch itself, such as USB charging, LED night light, Bluetooth music. Play, Wi-Fi camera, and more. At the same time, P2C technology connections are used between the different circuits where each super switch is located to implement mutual control, scene control, mobile phone remote control, and remote control.

The super switch adopts a completely open RS 485 protocol bus bracket on each single light switch panel to realize the installation and power supply, partial integration and interconnection of various intelligent single products or functional panels, such as the integration of Wi on the switch panel. -Fi camera, human sensor, intelligent thermostat, infrared remote control transponder, etc. Due to the openness and sharing of the RS485 protocol of the bus support, even any smart single product with Wi-Fi network function can be turned into a gateway or portal, and any mobile phone APP can be used to control the whole house of the entire P2C product.

LED light source

LED light source is the main application object of P2C technology. Due to the low threshold and low غير مجاز مي باشدt of P2C technology, only the P2C protocol needs to be added to the LED driver chip, with almost no additional غير مجاز مي باشدt, and no need to externally connect any smart device. It can realize the most basic intelligent control functions for LED light sources, such as off-site switching, dimming, scene combination and so on. At the same time, under the condition of no P2C control, it can still be used as a normal LED lamp.

Cloud Hotel Intelligent Platform

Through P2C open source master controllers, half-wave switches, light drivers, motor drivers, concealed connection modules, and super switches, super sockets, etc., around the "light, company, and wisdom" to create cloud hotel intelligent system applications. One-key scene service, electrical control service, energy-saving control service, cloud platform service, sharing service, off-grid connection service are included.

P2C Cloud Hotel's application plan takes full advantage of the advantages of power line transmission. Regardless of whether the front-loading market or the post-installation market needs smart building, the existing cabling can be used to quickly install and build the system, which saves the need for separate wiring. Expensive labor and material غير مجاز مي باشدts.

Appliance connection

P2C technology is also a very practical connection technology for household appliances. As long as any manufacturer's home appliances with P2C protocol are plugged in, they can discover each other and achieve mutual control. For example, a television remote controller can be directly used to directly switch lights, adjust air conditioners, and control water heaters.

The promotion of P2C technology

P2C technology breaks the shackles of a closed control system, creates an interconnected and shared business model, and allows more manufacturers and various types of equipment to achieve the most basic interconnection, especially the intelligent application of LED lamps and small household appliances. At the same time, due to the high reliability and low غير مجاز مي باشدt features of P2C technology, it is fully equipped with the basic conditions for civilian applications, and is ready for smart homes to enter into millions of homes. The application of smart home functions for hundreds of dollars will no longer be The people's dreams.

Reducer Gearbox

Aluminum Alloy Gearbox,Cast Aluminum Valve Body,Aluminum Gear Box for Reducer

Metal Stamping CO.,LTD , http://www.nsaluminumdc.com

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According to traditional Chinese medicine, the roses are sweet and slightly bitter, and the most obvious effect is qi stagnation, blood stasis, and menstruation and pain relief. In addition, the medicinal properties of the roses are very gentle, they can warm the hearts and blood of humans, relieve the sensation in the body, and have a calming, soothing and anti-depressant effect. Women often have some emotional irritability before menstruation or menstruation, and drinking roses can play a regulatory role. Today, with increasing pressure on work and life, even if it is not the menstrual period, you can drink more roses, soothe and stabilize emotions. Rose tea has auxiliary therapeutic effects on depression and anxiety. And often drinking rose tea also helps to lose weight, and no side effects, which at the same time can also whiten, is the beauty of beauty products.

The spring climate is pleasant, and Vientiane is a good time for health. Chinese medicine practitioners believe that spring health liver first. We all know that the spring weather is still relatively dry, and you will get angry and other symptoms if you don’t notice it. Then how comfortable it is to drink a cup of health tea. For those with liver qi stagnation, experts recommend drinking rose tea.

The irritability of temper and love in the event of a misfortune may be due to traditional Chinese medicine, liver qi stagnation and liver irritability. According to Chinese medicine, it can be treated by drinking a small herbal tea. People with liver qi stagnation may wish to drink rose tea.

Roses have the good name of “Shangyu Shengyao” and are “fire extinguisher” with “quick temper”. It has the functions of qi stagnation, stagnation, and blood stasis, and can be used for moderate amounts of rose tea when the temperament is irritable or moody. In addition, it can be added when soaking, making pastry preserves, and making dishes. Of course, the easiest way is to take 9-15 grams of roses every day, put it in a transparent glass, and soak in boiling water for 5 minutes to make tea. In addition, if the tongue coating is yellow and bitter, you can add 9 grams of chrysanthemum to your tea. Old people feel tired and qi can add 3-5 jujube. If the anger is more prosperous, you can add 3 grams of Lily and 3 grams of orange colostrums to enhance the power of soothing the liver and purifying the air.

The last thing to remind is that roses are not "specialized medicines for women." As long as they meet the indications, men are equally applicable. In addition, the rose is best not to soak with the tea, because tea contains a lot of tannic acid, will affect the efficacy of roses. People who have known liver qi stagnation may wish to drink rose tea. In addition, women with excessive menstrual periods should not drink it.

Rose Tea Bubble Method

Matching and efficacy of rose tea

1, beauty rejuvenation rose tea

Material: jujube, heterophylla, rose

Practice: Two little princes to participate in a jujube and rose brewing 10 minutes after drinking.

Efficacy: The Prince's participation in the nourishing effect of jujube can make Rose's liver function more durable.

2. Kidney Bean Motherwort Rose Tea

Practice: 枸杞 Add Motherwort and Rose directly to brew.

Efficacy: Adjust fats and endocrine, stop acne great hero.

3, gold and silver rose tea

Ingredients: 1 g honeysuckle, 3 roses, 2 g of Mai Mendong and 2 g of Hawthorn.

Practice: Mix with boiling water for 15 minutes.

Efficacy: Liqi Jieyu, nourishing yin and clearing away heat. Applicable to the rise of liver Qi virtual fire, face yellow, dry skin. Long-term use, the effect is significant. 4, rose ume to fat tea

Material: 10 roses and 3 ebony.

Practice: Mix the rose and ebony with boiling water for 8 minutes.

5, tea roses

Material: 20 tablets, 20 roses

Foaming method: It is best to use a transparent glass to place the rosettes in a cup, brew with 95 degrees of boiling water, and cover the lid for about five minutes.

Efficacy: Runfei, help women nourish the liver and kidney, Liver eyesight, blood circulation, pain relief, heat and thirst quencher, Qi Pinggan, promote blood circulation, benefit human face, inhibit tumors.

6, red dates rose tea

Ingredients: 5 rose red dates 2

Practice: Use water brew at 80 degrees Celsius (water temperature can damage vitamin C)

Drinking: two glasses daily

Squid Products

Squid Tube,Raw Squid Ring,Flower Cut Squid,Bqf Squid Tentacle And Tubes

Zhejiang ocean family co.,ltd , https://www.ocean-family.com

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Founded in 2006, Shenzhen Buyle Garments Co., Ltd., a subsidiary of Hunan Ruia Hi-Tech Group Co., Ltd., is a professional and modern brand clothing company integrating research, development, design, production, sales and OEM processing.

Companies adhere to the steady and positive development strategy, pay attention to the accumulation of brand culture and quality improvement, focusing on the diversification, the field of integrated development, over the years, the company successfully promote fashion men's OEM business, by domestic and foreign first- Second-tier brand customers praise and favor; the same time, the company continued to actively expand the clothing market service space, and constantly introduced to meet the needs of the market all kinds of fashion new products, to meet the modern urban crowd's desire for fashion home clothing, the company launched in 2010, a new fashion Homewear brand --- KRLLOBO (Karen Fort).

KRLLOBO (Karen Fort) home service to capture the latest fashion elements, fashion, taste, quality and other elements as the main style characteristics, the material emphasis on the quality of products and comfort, soft materials, stylish style, while highlighting the unique products The design style, so that women relax in the wear, throw away the complex, fully demonstrated individuality and inner freedom.

RT Fabric

Rt Fabric,Elastic Fabric,Rt Woven Fabric,Four Sided Elastic Fabric

SHAOXING HENGHAI TEXTILE CO.LTD. , https://www.henghaitextile.com

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Rose Gold Single Cold Basin Faucet

What is rose gold colour faucet?

The color rose gold, is somewhat a rarer fixture color with a pronounced pinkish undertone. The rose gold faucets can come in vibrant titanium finish, or vibrant French gold.

What place does the rose gold faucet fit?

Suitable for home bathrooms, cafes, restaurants and hotels. The rose gold faucet is suitable for any bathroom. The surface is chrome plated with black matte and gold color, which is beautiful and fashionable.

How do clean a rose gold faucet?

For gold-toned faucets: Mix a little baking soda with distilled water on a sponge and gently dab the water spots. Do not press hard or use a scraping tool or abrasive cleanser. Rinse, then wipe dry.

Our company have gravity casting machines, CNC machines, grinding flats, high-precision measuring instruments and processing equipments. We also employ a large quantity of technical personnel and management personnel and a very professional sales team which will always respond to your queries immediately. Our products mainly are Basin Faucets, Kitchen Faucets, Shower Faucets and other sanitary ware accessories. Furthermore, we have already passed ISO9001: 2015. "Gain development by quality, Win customer by reputation" is always our aim while coordinated with our clients and has been leading us to the exportation of all over the world.

Rose Gold Basin Tap, Rose Gold Taps, Rose Gold Bath Faucet, Gold Rose, Rose Gold Mixer

Kaiping Jianfa Sanitary Ware Co.,Ltd. , https://www.jfsanitary.com

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1. Copper rods are transported, viewed and stored before entering the factory Most of the cable companies in China use copper for outsourcing. High quality metallic copper rods should be selected, standard supplier delivery, delivery procedures and guidelines, and copper rod inspections in accordance with GB. / T3048.2 or cable company standard implementation. The storage of copper rods can be covered with plastic or plastic film covering the copper rods, that is, the simplest physical barrier method blocks the copper rods from the touch of moist air. When the workshop uses copper rods, they must inspect the copper rods one by one to see if they have a black appearance and manipulate them from the source of production.

2, copper wire drawing process control 0.4mm monofilament drawing is usually selected continuous annealing copper pull machine and the middle pull machine, through the line, drawing and annealing, cooling, drying, closing line and other processes. First and foremost, the right mold should be selected, and it must not be too small, otherwise it will enforce the lattice variation of metallic copper and increase the temperature of heavy metals. Secondly, check the pH of the emulsion before turning on the machine to ensure that it is an alkaline solution. Add antioxidants to the drawing oil together. Form a passivation film on the outside of the copper conductor to avoid oxidation. When releasing the wire, adhere to the release tension and make it stable and even. Excessive quivering; operator should ensure proper height of water level in the drawing process, ensure uniform annealing, avoid lack of annealing or excessive annealing; at the time of take-up, the copper conductor should not have liquid remaining on the outside, and a monotonous place can be placed in front of the take-up line. Felt (often changed) to ensure monotonous monofilament. After all, after drawing, it should be sealed with a bright plastic film and stored in a monotonous environment to be circulated. Otherwise, the risk of oxidation may be caused by the high surface temperature of the conductor and the humid air.

3, copper wire stranding (bundle) and insulating rubber, sheath rubber extrusion process to copper wire stranding as an example, the conductor in the twisting process, through the various pressure die makes the metal copper lattice changes in the structure, in the strong Under the action of the external force, the temperature of the copper conductor after the over-mold has a greater progress than before the overmolding, so the outer layer of the copper conductor is easily oxidized. Therefore, the antioxidant (0.3% benzotriazole alcohol solution) can be dripped into the copper wire in the twisting and process top infusion hose, and the standard should be in accordance with the appearance of just moistening the copper wire. The appearance of oxidation or excessive gamma seizures occurs after all anti-oxidation work has been prepared and then switched on. The take-up place shall ensure that the take-up reel is monotonous, and after the take-up reel is full, seal it with a bright plastic film.

Charcoal Bbq Grill

Charcoal BBQ Grill,Charcoal Smoker BBQ Grills,Charcoal Barbecue Grill,Charcoal Grill

Zhejiang Haoda Electrical Appliance Co.,Ltd , https://www.zjhaoda.com

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Guangzhou Pictorial underwear Co., Ltd. was established in 2004, is Seoul Seoul Group set up a special brand in the country operating subsidiaries. Founded in 2009, Han Keli'er underwear is underwear Li's painting collection product development, manufacturing and marketing as one of the lingerie brand products cover bra, underwear, body sculpting clothing, home wear, camisole, thermal underwear, playing Underwear and hosiery and so on.

In 2000, Seoul Painting Group began to enter the underwear industry. As Europe's first line of underwear brands in Asia's largest supplier, the Group's underwear production plant not only has the traditional basic production equipment, but also from Taiwan, Germany, Italy and other places imported world-class advanced production equipment and testing instruments, And attracted many professional and technical personnel and management personnel, the establishment of a sound quality management system, as China's largest and most professional underwear manufacturers.

Over the years, we have always uphold the "responsibility and health counterparts, the coexistence of beauty and fashion," the purpose of "to create a new generation of women's health underwear," the mission of continuous innovation and constantly beyond, for the domestic and international underwear market has provided a large number Set "comfortable and healthy fashion elegant" in one of the underwear products.

Colorful world, all kinds of novelty products can quickly get the public's support, in the product of the new era of modern society, people not only for the appearance of the underwear and comfort needs, but also need products to health and fashion Want to combine, for people to create a perfect life. After many years of research, she has created the health-care lingerie of international quality and capable of showing the ***y body shape of women, which has attracted the attention of people from all walks of life. Guangzhou Pictorial underwear Co., Ltd. also with a strong R & D team, advanced technology and equipment and first-class production technology, the first in the industry to develop a comprehensive care of women's breasts, the physical prevention of breast disease, the most conducive to the health of women's breasts Health-type anti breast breast bra, and has obtained practical patent certification.

Coral Fleece Blankets

The product is thick, soft to the touch and has good thermal performance.

Down blankets can be used as bedding, knee pads.

blanket pants,xl blanket,70s blanket,blanket ugg

Shaanxi Xiaoze Textile Co., Ltd. , https://www.sxxzth.com

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OFweek Smart Home Network News To ensure the quality of smart products and maintain the product security of smart home, Midea Smart Home introduces software Wi-Fi security modules and hardware Wi-Fi security modules, as well as security gateways for whole house smart solutions.

For a single smart home appliance, it is generally composed of home appliances with Wi-Fi modules, mobile phone APPs, and smart cloud. Smart homes in the United States combine intelligent home systems from the perspectives of end, management, and cloud to solve the problems of smart devices in all aspects. Hidden danger. The Wi-Fi module is the entrance to the device's Internet and is the biggest source of security risks. In the R&D phase, we evade the use of risk functions. The product is blown off all debugging interfaces at the factory so that hackers can't start. The route SSID involved in the use of the product is in use. The storage of passwords and passwords are all stored in encrypted form to give the user the most intimate protection.

Mobile APP has always been the most popular entrance for hackers. We not only confuse the SDK and the so library, but we also use the industry-leading reinforcement algorithms to protect the APP itself, preventing the APP from being tampered with and debugged.

Smart cloud, use Alibaba Cloud Shield, high protection IP and other protection services to ensure the stable operation of cloud services. Communication protocol security has a very important position in the entire system. It has a close relationship with user privacy and control authority. Midea Smart Home fully considers the hardware module resource غير مجاز مي باشدt issue, optimizes the SSL security protocol, and introduces a more suitable smart device. Secure bearer protocol with cloud server and APP.

When the Wi-Fi module establishes a connection with the cloud, the asymmetric key is used to negotiate the session key with a random number, and the session key requires renegotiation after 24 hours of communication or power failure to prevent analysis or debugging. .

To ensure that the user has absolute control over the device, even if it is a LAN session, the Token mechanism will be used to ensure that the user controls the ownership of the device. The session key is renegotiated after each user logs in again.

The M-Smart security system was officially released in July 2016. It is the first and only smart home appliance manufacturer in China that has passed the China Information Security Evaluation Center. The Wi-Fi module equipped with the M-Smart security system is already in the information security field. Overseas products have been highly recognized by customers and Midea Group's intelligent home appliances are gradually completing system switching. In December 2017, all new products will be equipped with a new security system to give users the most intimate quality assurance.

                   

HEE Series

Heavy Duty Connector is a kind of connector, mainly used in industrial automation, equipment manufacturing and industrial system building and information and control technology and many other fields, also known as "industrial connector".  The use of heavy-duty connectors not only helps manufacturers save installation time and reduce production غير مجاز مي باشدts, but also enables users to enjoy a more efficient and convenient use experience. 

Hee Series Connector,Male Female Connector,High Density Industrial Connector,32 Pin High Density Connector

Kunshan SVL Electric Co.,Ltd , https://www.svlelectric.com

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The language of technical communication is the most important human communication tool and the main expression of communication and communication. In the era of the Internet of Things, when machines need to communicate, they also need to understand each other in a language that they can understand. Today, we will take a look at those wireless short-distance communication languages ​​and technologies commonly used in the Internet of Things - Huawei Hilink Protocol, WiFi (IEEE 802.11 Protocol), Mesh, Bluetooth, ZigBee, Thread, Z-Wave, NFC , UWB, LiFi.

1. Huawei Hilink

agreement in December last year, Huawei launched a grand self-developed smart home "three-piece" -Hilink agreement, Huawei-LiteOS systems and IOT chip. At present, various Internet end-users' interconnection and interoperability agreements on the market are already being put into competition, but they do not seem to be friendly to each other and are isolated from each other. They are behind closed doors. The Hilink protocol is known as “Putonghua” among smart devices. It can automatically discover devices and connect them at the touch of a button. It is also compatible with protocols such as ZigBee, WiFi, and Bluetooth.

2. WiFi /IEEE 802.11 protocol WiFi, full name Wireless-Fidelity, wireless fidelity, is a standard in wireless local area networks (WLAN). Since its launch in 1999, it has been one of the more commonly used ways of accessing the Internet in our lives. WiFi technology usually uses 2.4 GHz and 5 GHz surrounding frequency bands. By connecting a wireless router through a wired network, the wired signal can be converted into a WiFi signal. The WiFi standard family also has 802.11a, 802.11b, 802.11g, and 802.11n.

WiFiHaLow, the latest 802.11ah WiFi standard announced by the WiFi Alliance in 2016, enables WiFi to be used in more places such as: small-sized, battery-powered wearable devices are also suitable for deployment within industrial facilities, and between Applications. HaLow uses the 900MHz band, which is lower than the current WiFi 2.4GHz and 5GHz bands. Lower power consumption, while HaLow's coverage can reach 1 km, the signal is stronger, and it is not easily disturbed. These features make WiFi more responsive to the development of the Internet of Things.

Advantages: Wide coverage, fast data transfer rate.

Disadvantages: poor transmission security, poor stability, slightly higher power consumption, and poor networking.

3.Mesh / IEEE802.11s

Wireless Mesh Protocol network, referred to as cheap "LastMile" broadband access scheme, which uses a multi-hop wireless mesh structure to provide broadband access to mobile users. Mesh is a combination of WLAN and mobile AdHoc (peer-to-peer) networks. Compared with the WLAN, each network terminal can perform direct communication between peers, and no longer needs to be forwarded by the AP (base station), and the coverage is larger. Compared with AdHoc, due to the fixed and power-supply backbone routers, there is no need to consider too much in terms of mobility and power consumption.

Advantages: Fast network deployment, no complicated configuration; stable network, any node is broken, does not affect data transmission from other devices; network coverage is wide, and can be connected with multiple broadband wireless access technologies (such as WLAN, WiMAX, UWB, 3G, etc.) The combination of them forms a larger multi-hop network structure.

Disadvantages: With a certain degree of delay, it is not suitable for real-time monitoring applications, and the network capacity is limited.

4. Bluetooth /IEEE802.15.1 agreement

Bluetooth technology first started in 1994 by the Swedish Ericsson research and development. It uses frequency-hopping spread spectrum (Frequency-hoppingSpreadSpectrum), communication frequency band 2.402GHz-2.480GHz. Up to now, nine versions have been updated, namely Bluetooth 1.0/1.1/1.2/2.0/2.1/3.0/4.0/4.1/4.2, and the communication radius extends from a few meters to several hundred meters.

When WeChat and Baidu Cloud are not yet popular, we are always accustomed to turning on Bluetooth devices in mobile phones and sharing the fun and good things on mobile phones with friends around us. Bluetooth technology is widely used in mobile phones, PDAs and other mobile devices, PCs, GPS devices, and a large number of wireless peripheral devices (Bluetooth headsets, Bluetooth keyboards, etc.).

Bluetooth technology also follows the development of the Internet of Things. The latest Bluetooth 4.2 data transfer rate up to 1Mbps, more powerful privacy features, Ipv6 network support. In the field of smart homes, Bluetooth devices using the BultoothSmart technology can achieve "dialogue" between devices and devices without network access. This can solve the case of sudden disconnection without WiFi, smart home equipment will still be able to continue to work.

Advantages: Fast speed, low power consumption, high security.

Disadvantages: There are few network nodes and it is not suitable for multi-point deployment.

5.ZigBee/802.15.4 protocol Zigbee was formally proposed in 2003. It appeared to compensate for the high complexity of the Bluetooth communication protocol, large power consumption, proximity, and small network size. The name is taken from the bee, and the bee (bee) flies through the "dance" of fluttering and "zigs" to communicate the position information of the pollen with the companion, and this way constitutes a communication network in the group.

ZigBee can operate in three frequency bands: 868MHz-868.6MHz, 902MHz-928MHz, and 2.4GHz-2.4835GHz. The last frequency band is universal in the world, with 16 channels, and this band is a toll free, application-free radio frequency band. The three band transmission rates are 20 kbps, 40 kbps, and 250 kbps, respectively.

ZigBee uses the ad hoc network to communicate and is the most famous wireless communication protocol in the field of wireless sensor networks. In a wireless sensor network, when a certain sensor's mesغير مجاز مي باشدe cannot be delivered smoothly from a certain communication path, the dynamic router will quickly find another close-up channel transmission data, thus ensuring the reliable transmission of information.

ZigBee is not a mainstream wireless communication technology, but it is highly sought after by some manufacturers for its low power consumption, low غير مجاز مي باشدt, low speed, high capacity, and long battery life. For example, Xiaomi launched a series of home smart products in 2015, all support ZigBee communication, and the recent launch of millet temperature humidity sensor.

Advantages: high security, low power consumption, strong networking capacity, large capacity, long battery life.

Disadvantages: high غير مجاز مي باشدt, poor anti-interference, ZigBee protocol is not open source, communication distance is short.

6.Thread/IEEE 802.15.4 The protocol Thread and ZigBee are both 802.15.4, but great improvements have been made for 802.15.4. Thread is a protocol built on top of IPv6. It does a great job of optimizing transmission security and system reliability. It can carry the AllSeen of Qualcomm Haier's dozens of enterprise groups and the Internet of Things, and it can also support Apple's Homekit smart home platform. Google's Nest put Thread as the only communication protocol of the household's Internet of Things, and Nest launched an industry alliance. The alliance members jointly promoted the Thread protocol. Thread short-range communication is also promising.

7. The Z -Wave protocol Z-Wave wireless networking specifications were introduced in 2004, led by Denmark's chip and software developer Zensys, and the Z-wave Alliance promoted its application. Z-Wave operates at 908.42MHz in the United States and 868.42MHz in Europe and uses wireless mesh network technology. Therefore, any node can directly or indirectly communicate with other neighboring nodes in the communication range. The data rates include 9.6kbps and 40kbps. The output power is 1mW and 0dBm. The effective coverage of the signal is 30m indoors and over 100m outdoors. Z-Wave is an emerging radio frequency-based, low-غير مجاز مي باشدt, low-power, high-reliability, short-range, narrow-bandwidth application.

Z-Wave focuses on home automation. It is more popular in European and American countries. It enters the Chinese market later than Zigbee, and its market share is far behind Zigbee. Because of the frequency band division, although it can develop in China, it is also cautious.

Advantages: Simple structure, low speed, low power consumption, low غير مجاز مي باشدt, long transmission distance relative to ZigBee, high reliability.

Disadvantages: The standard is not open, the chip can only be obtained through the sole source of SigmaDesigns.

8.NFC

NFC, near field communication, was jointly developed by Philips Semiconductors, Nokia, and Sony in 2002. In 2004, the NFC Forum was established to focus on the standardization and promotion of near field communication technology. The technology evolved from the integration of RFID and interconnection technology. NFC is a short-range high-frequency radio technology with an operating frequency of 13.56 MHz and a distance of 20 cm. Its transmission speed is 106Kb/s, 212Kb/s or 424Kb/s. Through the card, card reader and point-to-point three business models for data reading and exchange.

NFC and Bluetooth technology are similar in function, but the transmission speed and transmission distance are not as fast and far away from Bluetooth. At the same time, the power consumption and غير مجاز مي باشدt are low, and the confidentiality is good. These advantages make it the darling of mobile payment and consumer electronics.

Recently, applepay and samsungpay have become very popular in the field of mobile payment. The importance of NFC technology in the future of mobile IoT is self-evident.

9.UWB

UWB, UWB, a carrierless communication technology, uses nanosecond to piغير مجاز مي باشدecond non-sinusoidal narrow pulses to transmit data, enabling data transfer rates of hundreds of Mb/s to several Gb/s in a range of approximately 10m . UWB has many advantages such as strong anti-interference performance, high transmission rate, wide bandwidth, low power consumption, and low transmission power. It is mainly used in indoor communication, high-speed wireless LAN, home network, cordless telephone, security detection, location measurement, radar, etc. field.

What is more interesting is that the standardization of UWB has always been controversial, which also indirectly slows down the pace of its promotion. Compared with wireless communications such as Bluetooth, 802.11b, and 802.15, UWB can provide faster, more distant and wider transmission rates, and more and more researchers are investing in UWB.

10.LiFi

LiFi, optical fidelity technology, is a new wireless transmission technology that utilizes the visible light spectrum (such as light emitted from a light bulb) to transmit data. It was invented by Prof. Harald Hass, University of Edinburgh, UK. LiFi is equivalent to Wi-Fi's visible light wireless communication (VLC) technology, which utilizes light wave transmission data from light emitting diode (LED) bulbs to provide lighting and wireless networking at the same time, without electromagnetic interference, which can help alleviate current network traffic bursts. Increased questions.

All kinds of transmission technologies have their own strengths and shortcomings, and they hope to see them shine in the world of the Internet of Things. We also expect more companies like Huawei to use “Putonghua” in the industry to help the Internet of Things industry and bring us to a more comfortable and comfortable modern life.

Airblown Christmas Decorations

The inflatable festival series is a promotional product for festivals. The representative products include: inflatable Christmas products, inflatable Halloween products, inflatable Spring Festival and Lantern Festival products, inflatable Mid-Autumn Festival national festival gas products, inflatable Dragon Boat Festival products and other holiday celebration products Mold products. Inflatable holiday inflatable models can well drive the atmosphere of the festival, make the public blend into the strong holiday feelings, and can better provide profitable advertising effects to businesses. This inflatable festival series is a festive series of inflatable products that every business must purchase in large quantities during the festive season.

Christmas Inflatables,Outdoor Christmas Decorations,Christmas Inflatable Decorations,Funny Christmas Inflatables

Zhoushan Fule Christmas Decorations Co., Ltd. , https://www.fuleinflatable.com

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Technical Communication With the advent of IPv6, the unique Internet address is currently almost unlimited for all practical purposes. Therefore, how to apply them is not yet fully defined, but in short, the word "smart" will play a key role.

For example, smart homes will present an ideal environment for addressable nodes; each device in the home is likely to become 'smarter' in the near future, and this means that our home will also become smarter.

The idea of ​​remotely managing the home environment is still just a beginning. Conceptually speaking, you don't even have to manage affairs in the traditional sense; your family will be able to make decisions on your own. Mainly manifested as: intelligent lighting, security systems that identify personal identities, or environmental settings that adapt to the season, time of day, and occupancy. All of this will be possible, thanks to the powerful support of the microcontrollers, which collect and exchange data over the secure channel through wireless communications.



evolution of the number of wireless technology for decades, wireless communication technology has been used to facilitate control of industrial environment; for a long time before the emergence of cellular technology, the times GHz bandwidth in the past (still) mainly for Create a proprietary and robust RF link that has both good coverage and flexibility. However, it can be said that the recent 'open' wireless technologies working in the 2.4 GHz bandwidth range have promoted innovation, and the number of relevant protocols launched at the same time is also numerous. Today, protocols dedicated to wireless communications using the 868.0-868.6 MHz (Europe), 902-928 MHz (North America), and 2400-2483.5 MHz (Global) bands are commonly referred to as the IEEE specification of IEEE 802.15.4 and currently include a series of higher levels. Protocols such as ZigBee, Bluetooth, and threading protocols.

Continuous innovation has allowed manufacturers to drastically reduce the power consumption and size of RF-enabled microcontrollers for the IEEE 802.15.4 standard. As a result, it is now expected to provide the basic building blocks for smart appliances to connect to home gateways. , and from now on connect to the entire Internet. In this way, the homeowner can quickly monitor and control these smart appliances from anywhere, and the gateway can gain certain autonomy in controlling the family environment.

To some extent, the vision of this smart home will be realized through the deployment of smart electricity meters, which can more closely monitor the delivery of utilities such as natural gas, water and electricity. In the Smart Link environment, combined with the appliances responsible for consuming these products, the vision of the smart home has apparently taken shape. However, the smarter use of limited resources is only one aspect. In the future, there will be many opportunities to improve the way of carrying out daily activities, including security access control. The currently available 'Smart Lock' can be programmed using personal code to help homeowners understand the situation at home, including who is at home and at home, etc.

Smart homes will be implemented with a large number of sensors, controlled and connected through low-غير مجاز مي باشدt, ultra-low-power microcontrollers. This is a great opportunity for OEMs in this exciting and potentially profitable new area.

Integrated Solutions

although still low-level protocol IEEE802.15.4, but higher-level protocols but varied and different, device implementation of these agreements as well. For example, the JN516x family of wireless microcontrollers from NXPS Semiconductors integrates a proprietary 32-bit RISC core and a wireless transceiver with a 2.45 GHz radio, modem, baseband controller, and security coprocessor, and one that is in need of a larger range When used to directly control the dedicated output of an external power amplifier.

The security coprocessor provides the hardware-based 128-bit AES-CCM mode required in the IEEE 802.15.42006 standard, while the transceiver block provides MAC and PHY functions controlled by the protocol stack running on the CPU, as well as advanced protocols and application software.


Although the modem provides all the necessary modulation and spreading functions required by the digital transceiver to comply with the IEEE 802.15.4 standard at 250 kbit/s, the baseband processor provides all timing-critical functions of the MAC layer, using dedicated hardware to ensure the air interface. Accurate timing. This hardware/software partition allows the software to implement the sequence of events required by the protocol to schedule timing events in millisecond resolution, while the hardware can implement specific events with microsecond timing resolution. The software may handle higher layer functions of the protocol, for example, using the services provided by the baseband processor to send management and data mesغير مجاز مي باشدes between endpoints and coordinator nodes.

The security coprocessor can be accessed by application software to perform encryption/decryption operations. The hardware-based implementation of the encryption engine can greatly speed up the process. In addition, the JN516x has twenty general-purpose digital I/O pins and two dedicated digital outputs.

Another example of the future system on line SiliconLabs FIG

highly integrated wireless chip launched using ARMCortex-M3 core EM358x series.


The series also has a 2.4GHz, IEEE802-15.4-compliant transceiver. According to Silicon Labs, this series uses an efficient architecture that exceeds the dynamic range requirements of the IEEE standard by more than 15 dB. The use of integrated receive channel filtering means that devices using this family of SoCs can coexist with other devices using the 2.4GHz range; this is an important factor for smart homes because for many, if not all, home appliances, the expectation is that Start wireless function.

It integrates many MAC functions, AES128 crypto accelerators, and automatic CRC processing in hardware, including automatic ACK transmission and reception, automatic back-off delay for transmission, and evaluation of idle channels, as well as automatic filtering of received packets. The Ember packet trace interface is also integrated with the MAC to capture all data packets in and out of the device in a complete, non-intrusive manner and is specifically used with the Ember development tools.

The two series of wireless MCUs described here are specifically developed and positioned for implementation of the ZigBee protocol, which has been deployed in smart home applications, but the recent threading protocol is expected to result in smart home-based device development due to its unique features. Significant and positive impact. Many SoCs that support ZigBee will also support threads, thus providing a roadmap for developers and OEMs.

Conclusion

smart home will use a variety of technologies, including smart meters, gateways and appliances. Although not all smart homes can be connected wirelessly, with the continuous development of wireless technologies such as ZigBee and threads, a large number of smart appliances will use wireless communication as their primary (if not the only) form of connection to home gateways.

The continued development of IPv6 is the basis of this evolution. It can be said that threading is the preferred protocol in this regard because it was developed specifically for exploiting Internet address extensions. This will enable a variety of end-use applications to connect to the home while generating demand for a range of new devices.

In just a few years, homeowners may be able to ask themselves how they were managing when they couldn't monitor and control all aspects of home from anywhere in the connected world.

Dual-Coated Glass Beads

These beads are coated with a special coating materials, during the manufacture of the glass beads, which will improve the characteristics of moisture-proof and adhesion of glass bead. In the way, the life cycle of the glass beads can be prolonged and this enhances the beads reflectivity in a rainy night. These beads are usually used in white or yellow line-construction of highway.

The glass bead can be produced based on the standard of countries or areas, such as EN1423/1424, AASHTO M247, BS6088, JIS R3301 and KS L2521 etc.

 

Dual Coated Glass Beads,Dual Coated Glass Beads Roadmarking,Reflective Dual Coated Glass Beads,Dual Coated Glass Beads Traffic Paint

CHIYE GLASS BEAD (HEBEI) CO., LTD , https://www.chiyeglassbeads.com

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                    Steel structure floor deck tile plate roll forming machine

This type machines are very popular!

1:Main parameter of Steel structure floor deck tile plate roll forming machine

2:Please see the details machine pictures:


3:We also have other type deck floor machine for your choosing.




4:Other type machines may you like:






5:Advantage:
21 years wealth experience.
Exported to more than 30 countries.
We can design according to clients' need.

We are different from others:Good quality machines are from good quality parts:





6:Our certificates:



7:FAQ:
1. Does one machine can only produce one style panel profile?
Not exactly.For wider and double layer making machine. It can produce more than 6 kinds of panels.

2. Do you have after sales support?
Yes, we are happy to give advice and we also have skilled technicians available across the world.We need your machines running in order to keep your business running.

3. How to visit your company?
a.Fly to Beijing airport: By high speed train From Beijing Nan to Cangzhou Xi(1 hour), then we can pick up you.

b.Fly to Shanghai Airport: By high speed train From Shanghai Hongqiao to Cangzhou Xi(4.5 hours), then we can pick up you.

4. How to get a quotation?
a. Give me the profile drawing and thickness, this is the important. If no,I will suggest you some.
b. Other specific requirements are welcome, such as the speed, power and voltage you want.

5. What can you do if the machine broken?
Our machine's warranty period is 12months! If the broken parts can't repair, we can send the new parts replace the broken parts free. If after warranty period,we can through negotiation for to solve the problems, and we supply the technical support for the whole life of the equipment.

6. Can you be responsible for transport?
Yes, please tell me the destination port or address. We have rich experience in transport.

7. You are trade company or factory?
We are factory. Welcome to our workshop for visiting.


8. How long the machine could be made?
Normally speaking, common roof profile roll forming machine could be made within 45 working days.
If you need machines in a hurry, we can make it for you less than a month.

8:If need more machine pictures or videos,welcome to contact me.

 

                           

Small Chaff Cutter

Small Chaff Cutter ,Small Forage Chaff Cutter,Grass Cutting Chaff Cutter,Multifunctional Silage Chaff Cutter

Shuangfeng Nongjiabao Machinery Technology Co., Ltd , https://www.starchmachine.nl

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