The main causes of alarm monitoring and building intercom system operation are: product quality, installation and commissioning, maintenance, daily operation habits and external environment. The city alarm monitoring system is also closely related to the line and power supply of the telecom operators.
Urban alarm monitoring and building intercom are a relatively complicated system engineering, which will affect the stable operation of the system from system design, product selection, project implementation to system maintenance. Therefore, when there is a problem in the system, it is necessary to first analyze which key point causing the problem is caused by which link, and finally determine who is responsible. It is unscientific to arbitrarily judge responsibility as equipment manufacturer or engineering integrator.
Through investigations, it is found that the areas of alarm monitoring and building intercom system with high “瘫痪†rate are:
From the application environment, it is mainly intelligent community intercom system, perimeter alarm prevention system, urban road monitoring system, etc.;
From the perspective of system construction, the higher the system integration, the higher the probability of “瘫痪â€; the more the system or the product brand is involved, the higher the probability of “瘫痪â€; the wide spatial distribution of the system and the long transmission distance, “瘫痪"The higher the probability.
In comparison, the quality of the high-rise residential building intercom system is better than that of the general residential system. The construction quality of the city-level monitoring and alarm system is lower than that of the large and medium-sized cities and coastal developed areas.
1, the product is mixed, fake mao fake and inferior
Some insiders commented that China is now security for all. A screwdriver, three or five people rented a room to start assembling security products, the price of the product is down, but it is not normal. Security is a highly professional industry. The system has a large investment and long service life. It has high requirements for technology, experience and maintenance. The influx of a large number of enterprises, the industry hides huge risks: First, the market risk, the market will inevitably survive the inferior, a large number of production enterprises with professional standards are facing the elimination, which leads to product after-sales service can not keep up; second, social risk, low-level production Enterprises can not only provide qualified alarm monitoring and building intercom system products for cities and residents, but also a large number of systems will become “garbageâ€.
In the same way, the products of different manufacturers that have passed the same testing institution are tested. In actual use, there are still great differences in performance. The qualified test only means that the product can enter the market, and it does not mean that the product will not have quality problems. And the product to be inspected and the actual mass-produced product itself will also be different; at the same time, different batches of products will also have differences in the use of components, resulting in the quality of the finished product.
In addition, some product manufacturers do not recommend products for applicability when recommending products, resulting in failure to meet system operation requirements during actual use. Even if there is no problem with the quality of the product, in the integrated environment, if the integration test is not carefully carried out, there may be compatibility or stability problems in the operation due to the integration of the products with each other.
Li Liang, director of the Xintong Branch of the Gong'an Bureau of Taizhou City, Jiangsu Province, said that the technical defense products are currently emerging industries in China, and the technical standard system is not perfect enough, especially the product durability indicators are not sound enough and the testing conditions are limited. Even the products that pass the test can only meet the relevant functional index requirements, and can not meet the durability requirements as the household appliances. This is mainly because China's existing technical defense products manufacturers have not yet reached a certain level in terms of production technology, manufacturing level and scale. Most of them are small and medium-sized enterprises, such as Haier and Changhong.
2, improper system design, construction is not standardized, cut corners
There are four reasons in the industry to analyze and summarize the engineering failures:
Improper construction design: First, the door intercom system of the building intercom system is designed to be installed in an open place, and it is not waterproof or damp-proof, causing water ingress, etc., causing failure; secondly, the door machine is designed on the door because when the door is opened and closed It will cause vibration to the door machine to cause failure; the third is the failure caused by the installation of the networked equipment outside the room without waterproofing, lightning protection, etc. Fourth, the floor platform is not designed to be used, resulting in one failure and full system failure; The fifth is to install less power, resulting in insufficient power supply, gray image, distortion and other faults; sixth is not using the original original power supply to cause unstable faults; seventh is the design of the door closer is not suitable, resulting in door deformation, or used The failure caused by the unqualified quality of the electric lock has been high. In the above various faults, users and property management companies can't find the reason, and they can only attribute the responsibility to the quality of the building intercom products.
Rough construction process: If the wiring is not soldered or heat-shrinkable, the wires are twisted together, and the electrical tape is entangled, causing the connector to loosen, or the connector is oxidized.
Natural reasons: no clean maintenance, no routine inspection, natural failure caused by dust, insects, groin, rat urine, etc. For example, some small insects climb into the floor platform, power supply, extension and mainframe during the winter. Since these devices will generate tiny heat during work, which can warm the insects for the winter, it becomes a paradise for them.
Cut corners: Some engineers and integrators do not design floor platforms, design power supplies, use inferior materials, fake mao shoddy products, and three no products in order to pursue high profits. This is an important cause of system failure.
3, the system is used frequently and is prone to failure
On the one hand, because the alarm monitoring and building intercom system are running 24 hours a day, especially the building intercom system is frequently used frequently, and it is easy to malfunction; on the other hand, in the long-term operation of the system, it is free to change due to improper operation. The system configuration, or the management system is imperfect, causing illegal operations or non-maintenance personnel to log in to the system for operation, which may cause such problems in the system.
Alarm monitoring and building intercom system are mainly related to stability, reliability and operation and maintenance services. Because a stable, reliable, and well-operated alarm monitoring system 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 products itself is constantly improving, and the stability of the previous products has been greatly improved; From the perspective of software and hardware system integration, integration ideas and methods are also constantly innovating, but users' needs for stability should be said to have no limits.
There are three factors that restrict the “stable†of the building intercom system, namely, point, line and surface.
“Point†represents building intercom products, including mainframes, extensions, floor switches, networked switches, etc. The core technology and quality control of the products are the key to the stability of the system. “Line†refers to the wire and wiring of the system. At present, most of the building intercom products adopt the traditional video line plus signal line method. Not only the wire cost is high, but also the construction is troublesome. It is easily interfered by environmental factors during the transmission process. , affecting the stability of the system. “Face†refers to the networking of the entire building intercom system. The stability of networking performance is the biggest demand for the stability of building intercom system. Especially in large-scale community networking, the core technology of networking is very important to the stability of the entire building intercom system.
Reliability: Reliability reflects the ability of the system to provide continuous service, which can be measured by the mean 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 reline, system inspection cycle and maintenance report.
4. The project acceptance procedure is not standardized and goes through the field.
Li Liang, director of the Xintong Department of the Gong'an Bureau of Taizhou City, Jiangsu Province, said that the relevant problems of the acceptance of the security project indicate that after the construction of the project is completed, it is important to check and accept. 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 have the qualifications for testing security projects. A large number of security projects cannot be guaranteed by these two testing institutions. Therefore, it is inevitable that the acceptance procedures are not standardized and the situation will be passed.
Even after acceptance by the competent department, it is generally stable after the new system has just been installed and debugged. Since it has not yet experienced the test of harsh environment, it is difficult to find hidden problems, especially wiring engineering. In an outdoor environment, after the monitoring and alarm system is frequently used by the wind and rain, the baptism of the sun, and the building intercom system, the problem will gradually be exposed. At the same time, the acceptance criteria of the technical and engineering inspection and acceptance departments of various localities are not uniform, and the procedures for project acceptance are not the same.
There are also cases where Party A’s project budget is insufficient, resulting in a simple system design. It is easy to go wrong when encountering a complex operating environment. There is also a subsystem with several subsystems, which are subcontracted by several system engineers. One piece, each subsystem has poor compatibility and it is difficult to integrate into one platform. If a subsystem has a problem, it will affect the operation of other subsystems; perhaps the acceptance of a single subsystem is acceptable, but the overall operation will be problematic. Since a large alarm monitoring and building intercom system project is constructed in several phases, if the product brands used in each period are different, and different engineering companies are under construction, the probability of occurrence of problems is even greater.
5, product after-sales service can not keep up
The reasons why the after-sales service can't keep up include: First, the products purchased by Party A and the contractor are not qualified. Such products are basically produced by small companies, the price of the products is low, and there is basically no after-sales service; Qualified, but due to the survival of the fittest in the market, some enterprises have not transformed. These factors lead to the insufficiency of after-sales service. 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 that the products are not normal. use. The survey found that although the products that have passed the inspection by the relevant state departments have no problem, the individual products are different in different environments and the system applications are different. If the system design is defective, it is easy to cause problems, especially some A system with high integration and functional personalization.
6, the use of maintenance is not standardized maintenance and update costs are difficult to implement
Yang Jincai, president of the Shenzhen Security Industry Association, believes that after the completion of the alarm monitoring and building intercom system construction, the use of maintenance is not standardized, and the maintenance and renewal costs are difficult to implement is an important reason for the system "瘫痪". After the completion of the project implementation, the acceptance is mainly for whether the project meets the relevant national standards, the project's bidding requirements and project contract requirements, etc. If it meets the requirements, it can pass the acceptance. Therefore, even if the project is approved by the project, there may be problems in the project due to problems such as system design or equipment selection.
As the intermediate link of alarm monitoring and building intercom system engineering, the engineering company should have more responsibility. The engineering acceptance of the competent department generally means that the system can be used normally, and each system function satisfies the original design terms. Although there are many inspections of concealed projects, many problems are discovered after a period of use. Engineers should regularly return to solve potential problems in time to prevent the scope of failures from expanding.
After investigation, it was found that some city alarm monitoring and building intercom system acceptance and transfer to the use of the unit, only use, no maintenance, even if there are maintenance personnel, is also temporarily hired security, system maintenance is very unprofessional, not standardized. This situation is particularly prominent in community building intercom systems, with no maintenance funds or professional maintenance engineers.
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