Anti-theft alarm system is generally made up of intrusion detectors, anti-theft alarm controllers and alarm center (hardware plus software). Its simplest form is the local (home, unit, etc.) alarm system. Its components are intrusion detectors and local alarm controllers, as well as audible and visual alarms (which can be either alarm controllers or external). The sophisticated anti-theft alarm system can have thousands of intrusion detectors. The alarm receiving system can be composed of anti-theft alarm controllers distributed in various regions (various regions) and alarming machines in the alarm center. The central alarming machine has features such as alarm notification, time display, information storage, alarm, and output, and an alarm with address code is output to the PC. The database in the PC will provide the alarm unit (area), alarm time, and alarm category. The information of the alarm unit (address, telephone, unit owner or contact person), the specific alarm point and what intrusion detector is used at that point. At the same time, there are early warnings that can be notified to the police, as well as reporting and eliminating cases after the police are dispatched, handling the storage of the results, and the time and details of handling the officers and officers.
Complex systems often include linkage with electronic map GIS, linkage with GPS systems, and linkage with CCTV, access control, and patrol systems.
Anti-theft alarm controller category and function introduced
Anti-theft alarm controller is the key equipment of the anti-theft alarm system, it is China's mandatory certification of the product (that is, a 3C certification), the national standard GB12663-2001 has a lot of specific and detailed requirements for the function of this type of product. The national standard GB12663-2001 also has clear requirements for the environmental adaptability of this type of product, which includes climate and mechanical environmental adaptability and electromagnetic compatibility adaptability. At the same time, the national standard GB12663-2001 also has clear requirements for the safety of such products.
According to the GB12663-2001 national standard definition of "General technical conditions of the anti-theft alarm controller," Burgar-atarm controt unito should be set in the intrusion alarm system to set guard, disarm, judge, test, indication, Devices that transmit alarm messages and perform certain control functions.
Anti-theft alarm controller according to the protection function is divided into A, B, C three levels: A level for the lower protection function level; B level for the general protection function level; C level for the higher protection function level.
Anti-theft alarm controller environment adaptability requirements
1. Climate and mechanical environment adaptability
The anti-theft alarm controller should be able to withstand the following environmental conditions: GB/T15211-1994 5.1 harsh level 4 high temperature environment; GB/T15211-1994 5.2 harsh level 6 low temperature environment; GB/T15211-1994 5.6 severity level 4 (work), 2 (life) of the constant heat and humidity environment; GB/T15211-1994 5.4 severity level 1 (work), 2 (life) of the mechanical vibration environment: At the same time, the test function is normal, should not produce a leakage alarm and Incorrect alarm.
2. EMC compatibility
Anti-theft alarm controller should be able to withstand the following harmful effects of electromagnetic interference: GB/T17626.2-1998 severe level 3 electrostatic discharge interference; GB/T17626.3-1998 severe level 3 RF electromagnetic interference; GB/T17626. 4-1998 Severe Class 3 Electrical Fast Transient Burst Interference; GB/T17626.5-1998 Severity Rating, Power Lines Do Not Exceed 3, DC, Signal, Data, Control, and Other Input Lines Do Not Surpass 2 Surges (impact) interference; GB/T17626.11-1998 Severity 40% UT 10 cycles of voltage dips, 0% UT 10 cycles of short-term interruption of interference; At the same time, the test function is normal, should not produce leakage alarm and error Call the police.
3. Emphasis
In light of the actual situation, the following points must also be emphasized:
(1) At present, the climate and mechanical environment adaptability of the anti-theft alarm controller is a general requirement, and measures should also be taken for real harsh conditions such as high temperature, severe coldness, maritime nature (high humidity and heat), and chemical sites.
(2) Measures should also be taken when working under strong vibration and shocks.
(3) At present, the electromagnetic compatibility of anti-theft alarm controllers is also a general requirement. For lightning strikes, the areas with strong external electromagnetic interference need to be strengthened. Some products adopt measures and some product measures are too weak. We are designing such products. Should strengthen the protection.
(4) At present, the national standard GB12663-2001 only pays attention to the outside world's interference and influence on the anti-theft alarm controller, but does not notice the interference of the anti-theft alarm controller to the outside world, and pays attention to the interference to other equipment when composing the system, and What measures should be taken to reduce the impact. At the same time, attention should be paid to the external interference of the anti-theft alarm controller, especially the external cable of the keyboard.
(5) GB12663-2001 did not mention that the enclosure protection grade product should propose possible protection levels, and should indicate indoor, outdoor, high dust, strong rain and so on.
Anti-theft alarm controller security requirements
Anti-theft alarm controller safety requirements include power lines, insulation resistance, electrical strength, over-voltage operation, over-current protection, leakage current, anti-overheating, temperature rise, flame retardant requirements.
At the same time stressed: (1), safety is the most important, it has a vote veto role, product failure is often in this part; (2), exports are more important, especially exports to the United States and Europe, UL standards in this regard , IEC standards, BS standards, DIN standards, EN standards are all very strict. Their supervision is also very strict and they should be given enough attention.
The key points of the burglar alarm controller system
1. Intrusion detector and burglar alarm controller signal transmission (close range, indoor, outdoor)
Transmission methods are generally: wired, wireless, wired + wireless. For example: There are four-way, six-way, eight-way, and sixteen-way cable; wireless is four-way, six-way, eight-way, and sixteen-way; wired + wireless is eight-way wireless + eight-way cable, four-way wireless + four-way cable.
2, intrusion detector plus encoder through the bus to the anti-theft alarm controller transmission
Its advantage is that the province of wiring, labor hours, and for reliable use, often should increase the short circuit protector, it is best to all the way a short circuit protector, and some short circuit protectors can be connected to four or eight way. Short-circuit protector, also known as short-circuit isolator, its role can avoid the whole short circuit bus 1 bus.
3, anti-theft alarm controller and alarm center transmission method
(1). Dial-up transmission method: There are many mature products at present. It is especially suitable for units. Because of its mature technology, easy installation, and stable and reliable system operation, it is a networked alarm system widely used at home and abroad. The advantages are especially prominent if there are internal telephone exchanges. The disadvantages are as follows: (1) Everybody has a clearer approach; (2) It is easy to break the telephone line, which also cuts off transmission; (3) Telephone charges occur with the public telephone network, and the general affordability of the residents is problematic; (4) The system has a relatively large capacity. The center should be equipped with multiple telephone lines. The general configuration of at least two telephone lines, each 200 to 300 alarm users should be added to a telephone line, the alarm signal to the police should have a corresponding input telephone line.
(2). Bus system transmission mode: The bus system networking alarm system is currently used in large and medium-sized communities and single closed systems (such as museums, banks, commercial buildings, hospitals, etc.). Its advantages are short system lines, high communication speed, uniform wiring, and convenient bus connection. The disadvantage is that the bus system is an inspection method. It takes time from the first to the last. Therefore, one controller can hold up to 128 address codes, and some are dual-bus systems that can hold 256 address codes. Too much bus hang will affect the time (usually 1S) requirements.
At the same time pay attention to the following points: 1 transmission distance is generally RS232 is <100 meters, RS485 is generally 1Km ~ 1.5Km, it is related to the line, shielding, transmission rate, transmission format, reliability, etc.; 2 in order to maintain communication is correct, It is generally a method of using devices such as a bus distributor and a centralized controller. This one is to carry out system isolation and can appropriately extend the transmission distance; 3RS485 bus and CAN bus combination type, which is currently a better transmission method. The system backbone communication network uses the CAN bus, which has a fast transmission speed and a long distance. The system branch network uses the RS485 bus, which facilitates construction and saves user investment. This complements the advantages and disadvantages of the CAN bus and the RS485 bus. This approach is currently a more advanced approach.
(3). Dedicated broadband network alarm networking: At present, many units (banks, museums, commercial buildings, factories, schools, etc.) all have their own dedicated broadband networks. Dedicated broadband network alarms have good prospects, because at present the anti-theft alarm signal is a medium-low rate, that is, a type of information with smaller information. In terms of broadband network, it is less information and broadband network application development. At present, broadband networks pursue the integration of three networks of images, languages, and data. Anti-theft alarm signals are only part of the data information.
(4). Use of Internet alarm networking: Its greatest advantage is the use of the public network, which is very convenient to build. The area is large and convenient. It is suitable for use infrequently and occasionally. The shortcomings are: 1 leak alarm signal, an important place can not be used or recommended; 2 this kind of network environment, viruses and hackers attack is very easy; 3 network congestion, the system will be unstable and unreliable.
(5). Power line network: The power line anti-theft alarm system was used 20 years ago, and even the power system transmits data with high-voltage power network is also very mature. The disadvantage is that the interference signal on the power line is particularly large and particularly strong, so it is currently used less frequently.
(6). Cable TV network: It uses one frequency point to transmit anti-theft alarm signals. Although there are products at present, it is not widely used. The main disadvantage is that it is difficult to use a large-capacity system. This system cannot use inspection methods. Currently, the system can use a calling method to send and receive handshakes at both ends in a reliable manner.
(7). Wireless private network: It applies to the established wireless private network (for example: public security private network, bus private network, etc.).
(8). Wireless public network: It can use public networks such as GSM, CDMA, COPO, WGSM, and WCDMA that have already been established for transmission. The advantage is that it is easy to deploy, cost is low, and the network does not cost money.
(9). Wired public network and wireless public network: The advantage is dual-network combination, first wired, and wired when there is a problem. This transmission scheme greatly improves reliability.
The basic needs of the alarm center (Central Control Room)
1. The establishment mode of the alarm center
The establishment mode of the alarm center is: First, the standard alarm machine, PC, monitors, printers, software, etc.; Second, the alarm board, PC, monitors, printers, software and so on. Complex alarm centers (such as museums, banks and treasuries, large shopping malls, hotels, etc.) will also have television monitoring systems, satellite positioning systems (GPS), electronic maps (GIS), and access control systems. Some intelligent systems also include a security system SA (including an anti-theft alarm system, a perimeter security system, an access control system, a television monitoring system, an electronic patrol system, etc.). Generally, there are building automation (BA), fire alarm (FA), security system (SA), communication system (CA), integrated wiring (PDS), and integrated system (BMS) in the intelligent system.
2. Receive information transmitted by each anti-theft alarm controller
The information received by each anti-theft alarm controller includes: (1) Various alarm information, such as instantaneous alarm, tamper alarm, vandal-proof alarm, delay alarm, emergency alarm, transmission delay alarm, duress alarm, etc.; (2) Set alert ( Arming)/disarming (disarming) information; (3) isolation (bypass)/temporary isolation (temporary bypass) information; (4) reset information; (5) time information; (6) failure information; (7) tamper/breakdown information; (8) change of valid user Password event information; (9) transmission failure information; (10) modification of programming information; (11) main power-off information; (12) backup power supply under-voltage information.
Some basic information of the above 12 kinds of information must be transmitted, for example (1), (2), (3), (4) Date of issue: 2006/9/8 13:28:28