Misunderstanding of security system design

In the eyes of many people, the security system is to install several cameras in a building. Several detectors, and then combine them, this system will ensure the safety of the building without fail, the parties can sit back and relax, but in fact, this view is completely wrong. To elaborate:

First of all, the security defense system is a comprehensive system, which is an organic combination of physical defense, technical defense, and personnel management defense. The so-called physical defense refers to the walls, doors, windows and other facilities of the building. Under normal circumstances, if the characteristics and needs of the security defense are properly considered in the structural design of the building, the security defense system will be greatly simplified, reducing investment and improving The security factor of the building itself, we will use a certain space to illustrate this point in the future; technical prevention refers to the use of anti-theft detectors, cameras, access control and other electronic equipment to prevent the inside and outside of the building. The supplement and extension of physical prevention will be the focus of this article. With the foundation of the above two facilities, combined with the management and application of personnel to the equipment, this has formed an effective comprehensive security protection system. And people are the most important link in the whole process.

Secondly, before the safety prevention system is established, we must first clarify the purpose and focus of the safety prevention system for specific projects, and design according to the functional characteristics of different buildings with reference to the corresponding national standards. This article is the central idea of ​​this article. At present, there are not many safety precaution standards formulated by the relevant national authorities for different jobs. The specific contents of these standards are "Technical Specifications for Civil CCTV Monitoring System Engineering" GBSOI98-94, "Security Precautions for Cultural Relics System Museum" GB16571-1996 Department of Business Places Safety Precautions Engineering Design Code "GBT16676-16, the rest are mostly local standards of various provinces and cities. For some special-purpose buildings, such as government office buildings, press and publishing unit buildings, etc. Although there are no clear standards in the country, the local public security The agencies have some clear requirements. No matter what kind of application we aim for, we should design according to these standards and requirements. Below we will classify these aspects according to experience for readers ’reference. Pointed out.

The first category is the Heritage Museum System
According to national standards, first of all, according to the specific situation of specific museums, together with the owners, the risk level of technical prevention should be determined in accordance with GA27-92 "Regulations on the Risk Level and Security Protection Level of Cultural Relics Museums", and then the technology should be determined according to different risk levels. System requirements for anti-design, select the equipment used according to the local meteorological conditions and application occasions. Only after these two points are determined can the formal scheme design be carried out. The design of the building structure for different application sites and the division of the defense area of ​​the deep protection body are determined during the design. , The protection level of each area, and accurately calculate the range that can be reviewed by the image and sound; the design parameters of the entire system should be clearly stated in the design plan, such as the required protection area of ​​the alarm detector, the actual protection area, and the cross coverage rate , The scope of sound review, the reaction time of the system, the influence time of the linkage, the standby power index, the average trouble-free working time of the system, etc. The final acceptance is carried out according to this indicator. In short, the system should be clearly focused on the primary and secondary, and the indicators are clear. In particular, it should be clear that the system must not have missing alarms. Minimize false alarms as much as possible, so that the system can achieve the functions of preventing internal theft, textile robbery, and latent crime.

The second category, bank full touch system
Similar to the cultural relics system, first determine the protection level of the project with the owner according to GA / T38-92 "Regulations on Risk Levels and Protection Levels of Banking Business Places", and then determine the area category through the site survey and the functional use of each area. Plan design according to the requirements of each area; for example, the difference between the recording methods of the general area surveillance camera and the teller system camera, the difference in the alarm activation method, etc. In short, our design should meet the characteristics of the bank.

The third category, hotels, office buildings
The application of the security system in hotels and office buildings is very different from the above two parts. The security protection system in these places should be based on daytime management, so the system configuration should be based on cameras, which can be used in high-end office buildings. The access control system is mainly used to improve internal management capabilities. At this time, these departments can truly close the door and ensure the safety of indoor items; of course, there are exceptions in the office system, such as government departments, in order to improve the efficiency of government departments and enhance government departments. The image of is now advocated to open the office; at the same time, due to the psychological role of the leadership, and do not want to install a lot of cameras, in this case, we can only implement strict monitoring, recording, Strengthen civil air defense and strengthen management.

  Fourth category: family community

At present, the competition in the real estate market is extremely fierce. In order to be in a favorable position in the competition, various real estate developers have shown their magical powers and have invested in security, which mainly include: building intercom system, perimeter and environmental anti-theft monitoring system, family Indoor anti-theft system, etc. However, many developers do not seriously consider the real application effect and actual operability of the owners, but just point out that there is such a function in the advertisement, and use it as a selling point to promote it, which is deceptive to the owners. For example, in the indoor alarm part of the home, in order to save investment, many developers put the alarm probe directly in the networked building intercom system. This is the most typical concept sales method. The reason is because this method is There are fundamental limitations in technology; of course, different types of building intercom equipment have different characteristics, but there are definitely more or less problems, as follows:
1. Signal conflict: when the user is talking, the alarm signal will not be sent out or the alarm signal will interrupt the current call.

2. Signal blocking: When multiple users in a system alarm, they must be queued one by one to affect the response speed. When the subsequent alarm is processed, it may have moved, especially for the emergency alarm button (or emergency help button) ).

3. There are few passwords for disarming or disarming: many of these products do not have passwords for disarming and disarming. Just press the button on the indoor unit to arm, and then press the same button to disarm. In this case, only The device has a certain understanding, and the alarm will not play any role at all; the relatively high imported products have a similar short circuit block behind the indoor unit, which can set the system password, but the number of passwords is very limited, consisting of only two digits. Moreover, users are unlikely to change it themselves. Such passwords are equal to none for the installation company.

4. The number of defense zones is small or there is no division of defense zones at all: For a case where multiple detectors or emergency buttons are installed in one house, the management center cannot distinguish the nature of the alarm and cannot make a correct response in a timely manner. Even when not armed, the alarm signal cannot be sent out at all.

5. The alarm part does not have the usual detection function: it is impossible to know whether the alarm part of the owner's house is working properly. It is likely that this part of the function has already failed and the owner and the management department do not know it.