Anti-theft alarm technology development trend analysis

Anti-theft alarm system equipment is generally divided into: front-end detectors and alarm controllers. The alarm controller is a host computer (such as a computer host), is a processing center, the system includes wired/wireless signals, the system itself fault detection, power supply part, signal input, signal output, built-in dialer, etc. The alarm controller is an integral part of the anti-theft alarm system.

1, the impact of the environment on the anti-theft alarm system due to environmental interference caused by false alarm refers to the alarm system in normal working conditions, such as weather, rain and snow, thunder, high-power motor electromagnetic sparks, fog days, etc. The factors are domestic pets and electric toys. In principle, it is unavoidable, and the facts are not needed, which is a false alarm. For example, thermal airflow causes false alarms from passive infrared intrusion detectors; high-frequency sounds cause false alarms from single-technology glass break detectors; and ultrasonic sources cause false alarms from ultrasonic detectors. The most effective measure to reduce such false alarms is to use dual-detector detectors (two different principle detectors detect the “target” at the same time, and the alarm device only sends an alarm signal). The current products include: microwave-passive infrared double detector, voice-activated glass broken double detector, ultrasonic-passive infrared double detector and so on. However, some environmental noise detectors are powerless. For example, rats are in the protection zone; pets move around indoors. To this end, scientific and technical personnel have introduced micro-processing technology into the alarm system so that they have a certain ability to identify and think, and can judge to some extent whether it is an intruder or an alarm caused by environmental noise.

The biggest problem of the anti-theft alarm system is that it is vulnerable to the outdoor environment, and it is easy to report false alarms and omissions. Especially when a storm comes, or the vibrations of passing vehicles or aircraft take off and landing, etc., it often leads to accidental missed timing. Some anti-theft alarm systems have developed intelligent learning functions. They learn and memorize environmental conditions through “self-learning” techniques. When they are officially running, similar environmental conditions can be masked.

2. Anti-theft alarm system detection technology diversification At present, the front-end detectors of the anti-theft alarm system basically use the following technologies; infrared (active infrared, passive infrared), microwave, infrared microwave; vibration induction (sound and shock waves), microgravity Sensors, pressure sensors, lasers, temperature sensors, gas sensors, fingerprints, video image analysis, vein patterns, irises, brain waves, and more.

It is mainly to see what kind of detectors are used for the occasion and importance of prevention. At present, the most commonly used are: infrared (active infrared and passive infrared), microwave, infrared microwave, vibration sensing (sound and shock waves), although there are many anti-theft alarm detection techniques, and the implementation methods are diversified, but due to the technology itself The defects, processes, design, etc., make the current burglar alarm products have the disadvantage of high false positive rate. For example, anti-theft alarm products using infrared and microwave technologies have long been used and developed. The application of these technologies is very mature, but the natural defects are insurmountable. Only high-performance sensors, especially biometric sensors, can be used. Basically solve this problem.

Anti-theft alarm detection range varies according to detection technology, environment, etc., and is generally in the range of 5-300 square meters. The scope of the laser beam detector is greater, but it will not exceed 300 meters.

3, Anti-theft alarm system still needs to be perfect The anti-theft alarm industry has developed relatively slowly in the past 10 years, and the comprehensive digital technology has not yet been developed (hosts and detectors). At present, the latest technology in the security industry has adopted all-digital technology, whether in the front-end or control equipment. With the rapid development of science and technology, the alarm system industry is slowly moving toward digitalization and computer networking. All-digital detectors, all-digital network platforms, and multi-angle control methods (ie, a variety of joint alarm technology alarm protection systems, a variety of high-performance, low false alarm rate detectors). With the integration of access control systems, intercom systems, and systems, and ultimately integrated with the computer integrated security system. All the security subsystems will be integrated into the integrated alarm system under the computer management platform.