Analysis of Causes of Failure of Building Intercom System
The main reasons leading to alarm monitoring and building intercom system operation include: product quality, installation and maintenance, maintenance, daily operation and uغير مجاز مي باشدe habits, and external environment. The city alarm monitoring system is also closely related to the telecom operators' lines and power supply.
Urban alarm monitoring and building intercom is a relatively complex system engineering. The system design, product selection, project implementation and system maintenance all affect the stable operation of the system. Therefore, when a problem arises in the system, it should first analyze the key point that caused the problem, and determine who should be responsible for it. It is unscientific to arbitrarily determine that the responsibility is equipment manufacturers or engineering integrators.
The survey found that the areas of high alarm rate for alarm monitoring and building intercom systems mainly include:
From the perspective of the application environment, it is mainly the intelligent community intercom system, perimeter alarm prevention system, urban road surface monitoring system, etc.
From the system construction point of view, the higher the degree of system integration, the higher the probability of “瘫痪”; the more the system involves the use of departments or product brands, the higher the probability of “瘫痪”; the system has a wide range of spatial distribution and long transmission distance. The probability is higher.
In contrast, the quality of high-end residential building intercom systems is better than that of ordinary residential systems, and the construction quality of prefecture-level monitoring and warning systems is lower than that of large and medium-sized cities and developed coastal areas.
1, product mix, fake and shoddy despite repeated bans
According to industry insiders, China is now engaged in security protection for all citizens. A screwdriver, three or five people rented a residential house and began assembling security products. The price of the product was reduced, but it was not a normal phenomenon. Security is a highly professional industry, with large system investment and long life cycle. It has high requirements for technology, experience, and maintenance. A large number of companies are influx, and the industry hides huge risks: First, market risks, the market will inevitably win and lose - a large number of production companies that have lost professional standards are faced with Amoy - leading to product after-sales service can not keep up; Second, social risks, low The horizontal production enterprises can not only provide qualified alarm monitoring and building intercom products for cities and residents, but a large number of systems will also become “junk”.
It is also through the same testing agency to test qualified products from different manufacturers. In the actual use process, there is still a great difference in performance. The qualified inspection only represents that the product can be used in the market, and it does not mean that the product will not have quality problems. In addition, there will also be differences between the products submitted for inspection and the actual mass produced products; at the same time, there will be differences in the use of components in different batches of products, resulting in the quality of finished products.
In addition, some product manufacturers do not recommend products for suitability when recommending products, resulting in the inability to meet system operating requirements during actual use. Even if there is no problem with product quality, in the integrated environment, if the integration test is not carried out seriously, there may be compatibility or stability issues in the integration due to the integration of the products with each other.
Li Liang, director of the Office of Information and Communications Division of Taizhou City, Jiangsu Province, said that technical protection products are currently emerging industries in China, and the technical standard system is still not perfect. In particular, the product durability indicators are not sound enough and the detection conditions are limited. Qualified products can only meet the requirements of the relevant functional indicators, and can not meet the requirements of durability indicators as household appliances. This is mainly due to the fact that China's existing technical protection product manufacturers have not reached a certain level in terms of production technology, manufacturing level, and scale, and are mostly small and medium-sized enterprises. Enterprises such as Haier and Changhong have not yet reached this level.
2, improper system design, construction is not standardized, cutting corners
Professionals in the industry analyzed and summarized the four causes of engineering failures:
Improper construction design: First, the building intercom system door machine is designed to be installed in an open space, without waterproof, moisture-proof treatment, resulting in water, etc., thereby causing failure; second, the door machine is designed on the door, because when the door is opened and closed It will cause vibration to the door machine and cause failures. Third, the failure caused by the installation of the networked equipment on the outside due to non-waterproof, lightning protection, etc. Fourthly, it is not designed to use the floor platform, resulting in a failure of the whole system. The fifth is to install less power, resulting in insufficient power supply, the image is dark, distorted and other failures; Sixth, do not use the original original power supply to cause instability failure; Seven is designed door closer strength is not suitable, resulting in door deformation, or used The failure caused by unqualified quality of electric locks has remained high. All the above failures, users and property management companies can not find the reasons, can only attribute the responsibility to the quality of building intercom products.
The construction process is rough: If the wiring is not welded, no heat shrink tube is used, the wires are twisted together, and the electric tape is accidentally twisted. This causes the wiring head to loosen or fall off or the joint oxidation causes the failure. Natural causes: No equipment installed Clean and maintenance, no routine inspections, natural troubles caused by dust, insects, groin, rat urine, etc. For example, some small insects crawl into floor platforms, power supplies, extensions, and mainframes during the winter months. Because such devices will generate tiny heat during work and allow insects to warm their winters, they will become their paradise.
Stemming and cutting: In order to pursue high profits, some engineering companies and integrators do not design floor platforms, design power supplies, use inferior auxiliary materials, fake and shoddy products, and three products. This is an important cause of system failure.
3, the high frequency of system use is prone to failure
On the one hand, alarm monitoring and building intercom systems are all run 24 hours a day, especially if the building intercom system is used frequently, which is prone to failure. On the other hand, in the long-term operation of the system, it is arbitrarily changed due to improper operation. The system configuration, or the management system is not perfect, causing illegal operations or non-maintenance personnel to log in to the system to operate, may cause the system to have such problems.
Alarm monitoring, building intercom system operation is good or bad, stability, reliability and operation and maintenance of these factors. Because a stable and reliable alarm monitoring system with good operation and maintenance services is a good system.
Stability: Stability is the most important indicator of alarm monitoring and intercom system. From the product point of view, the integration of components and the product itself is continuously improving. Compared with the previous product stability, it has been greatly improved; From the perspective of hardware and software system integration, integration ideas and methods are also constantly innovating, but the user's need for stability should be said to have no limit.
There are three factors that restrict the “stability” of building intercom systems, namely point, line, and surface.
"Points" represent building intercom products, including mainframes, extensions, floor exchanges, and networked switches. The core technology and quality control of products are the key to system stability. “Line” refers to the wire and wiring of the system. At present, most building intercom products use the traditional video line plus signal line method. Not only is the wire غير مجاز مي باشدt higher and the construction is more troublesome, it is easily disturbed by environmental factors in the transmission process. Affects the stability of the system. “Surface” refers to the networking of the entire building intercom system. The stability of the networking performance is the greatest demand for the stability of building intercom systems. Especially in large-scale community networking, the networking core technology has an important influence on the stability of the entire building intercom system.
Reliability: Reliability reflects the ability of the system to provide continuous service and can be measured by the average time between failures. The longer the average time between failures, the better.
Operation and maintenance services: Operation and maintenance services mainly include the warranty period of each product in the system, whether to provide spare parts, fault response time and maintenance personnel arrival time, service hotline, system inspection cycle and maintenance report.
4, project acceptance procedures are not standardized to go through the field
Li Liang, director of the Bureau of Information and Communications Division of Taizhou City, Jiangsu Province, told reporters in an interview with related questions on the acceptance of security projects. After the completion of the construction of the engineering company, it is important that it be accepted and accepted. It is understood that the acceptance of most security system projects is basically superficial and subjective. Taking Jiangsu as an example, there are only two units in the province that are qualified for testing security projects. A large number of security projects can only be guaranteed by these two testing organizations. Therefore, it is inevitable that the acceptance procedures will not be standardized and will take place.
Even after acceptance by the competent authority, the new system is generally stable after it has just been installed and debugged. Since it has not yet undergone the test of harsh environments, it is difficult to find hidden problems, especially wiring projects. In the outdoor environment, after the monitoring and alarm system is subjected to wind and rain, baptism of the sun, and frequent use of the building intercom system, the problems will be gradually exposed. At the same time, the inspection and acceptance standards of the departments in charge of technical protection projects are not uniform and the procedures for project acceptance are not the same.
In some cases, the original project budget of Party A was insufficient, resulting in the design of the system being flawed. It is easy to encounter problems in a complex operating environment. There is also a project with several subsystems, which are subcontracted by several system engineering companies. One, the compatibility between the various subsystems is poor, it is difficult to integrate into a platform. If one subsystem has problems, it will affect the operation of other subsystems; perhaps a single subsystem acceptance is acceptable, but the overall operation will be a problem. As a large-scale alarm monitoring and building intercom system project is divided into several phases, if the brand of products used in each period is different, in addition to the construction of different engineering companies, the probability of problems is even greater.
5, after-sales service products can not follow
The reasons for the unsatisfactory product after-sales service include: First, the products purchased by Party A and the engineering companies are not qualified. Such products are basically produced by very small enterprises. The prices of the products are low, and there is basically no after-sales service. Second, even products Qualified, but because of the superiority and weakness of the market, some companies have either transitioned or no longer exist. These factors have caused the product's after-sales service to fail to follow suit. Therefore, most of the alarm monitoring and building intercom systems are directed at the product manufacturers because the external appearance of these systems is mainly because the products cannot be normal. use. The reporter's investigation found that products that passed the examination of relevant national departments had no problem with individual products. However, these individual products have different applications in different environments. The system design is very prone to problems if there are defects, especially if the system design is flawed. Some highly integrated, functionally personalized systems.
6, the use of maintenance is not standardized repair and update غير مجاز مي باشدts difficult to implement
Shenzhen Security Industry Association president Yang Jincai believes that after the completion of the construction of the alarm monitoring and building intercom system, the use of maintenance is not standardized, and maintenance and renovation غير مجاز مي باشدts are difficult to implement is an important reason for the system "squeak." The acceptance after completion of the project is mainly focused on whether the project meets the relevant national regulations, the tender requirements of the project and the requirements of the project contract, etc. If it meets the requirements, it can be accepted. Therefore, even projects that have passed project acceptance may cause problems due to problems such as system design or equipment selection.
As the middle part of the alarm monitoring and building intercom system engineering, the project company shall bear more responsibilities. Generally speaking, the project acceptance of the competent department means that the system can be used normally, and each system function meets the original design terms. Although there are many inspections of hidden projects, many problems can only be discovered after a period of use. The engineering company must pay regular visits to solve potential problems in a timely manner to prevent the extension of faults.
After investigation, it was found that after some city alarm monitoring and building intercom system acceptance were handed over to the use unit, they were used only and were not maintained. Even if there were maintenance personnel, they were temporarily hired and the system maintenance was not professional or standardized. This situation is particularly prominent in community building intercom systems, which have neither maintenance غير مجاز مي باشدts nor professional maintenance engineers.
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