Security alarm

A hazard detection system (GMA ) according to DIN VDE 0833 is a system, the dangers or property and life, by burglary, robbery, and fire reliably detects and reports.

This function requires the monitoring of the transmission paths and the detection of disturbances and sabotage. Also, a failure is to be avoided.

History

The history of modern danger warning system began on June 21, 1853: The first electro- magnetic burglar alarm was patented by Augustus Russell Pope, a tinkerer from Sommerville in Boston. She responded to the closure of a parallel power circuit. Edwin Holmes 1857 bought the rights to Pope's invention and founded the " Holmes Electric Protection Company". Edwin Holmes managed thanks to intensive advertising the economic breakthrough for his " burglar alarm telegraph ". By using the New York Telegrafienetzes he could even build the first alarm control system. In the 1860s, the Telegrafietechniker and inventor Edward A. Calahan tinkered with a system for effective alerting, which could also bring help. He told New York into districts, each of which was connected with such a central emergency. In 1871, Calahan helped build the American District Telegraph ( ADT) Company. The emergency call boxes of the type Calahan were very quickly becoming the standard in police and fire protection, but also intelligence services they used. The development stagnated, but the technology was more affordable and sat down, especially in the United States and increasingly in the private sector through. In the 1970s, the first PIR motion were integrated into the alarm systems. In the 1980s and 1990s, alarm systems were becoming increasingly widespread in Europe. Finally, in early 2000 the first wireless wireless alarm systems came in series to the market and popularized the alarm technology. In recent years, alarm systems followed the trend of networking: Modern alarm systems connect wire and wireless alarm with network technology. In the new systems integrate more recently, video surveillance via IP: The previously quite easy by bus techniques bridged boundaries between video surveillance and alarm systems ( so-called " alarm inputs / outputs " ) are resolved by it. Similarly, the manufacturers try to date also the idea of ​​prevention of mechanical security alarm technology under the (not yet developed for the alarm definition of technology ) introduce " Mechatronics".

Components

A GMA consists of at least the following parts:

  • Detector
  • Reporting lines, fuel lines,
  • Energy supply
  • Transducer ( optical / acoustic )
  • Central processing unit
  • Controls

A GMA must have two independent sources of energy. Fault messages and alarms are forwarded to a permanently manned location. This is often perceived control centers.

According to DIN VDE0833 A logbook must be kept for alarm systems.

Collective name

The danger alarm system is a collective term for

  • Fire alarm system (FAS ) according to DIN 14675
  • Robbery alarm system ( I & HAS )
  • Intrusion detection system (IDS )
  • Common intrusion of at least two basic types of GMA = Integrated GMA

Alarm types

  • Silent Alarm: This alarm is mainly used in banks in raids. This is for the protection of persons of employees, as a bank robber is considered unpredictable and not to notice that the bank staff has answered his demands triggered an alarm. In addition, you want the lawbreakers not put under time pressure or beat even in the immediate escape. He thus brings time savings for the police. When no silent alarm signal devices are activated. However, it is immediately alert the police or the like with means of telecommunication.
  • Audible alarm: When audible alarm, a loud beep. This is to draw attention to his environment and the object. Most of the audible alarm is used outside the opening times to beat a burglar as quickly as possible into the flight, what ( if successful ) a harm minimization result has ( for example, only one is proposed window). An acoustic signal generator inside the house must report continuous alarm. The audible alarm from a signal generator, which alerted the outside sitting ( house wall ), and so the public is anonymous, time- limited. It should automatically turn off for disturbing the peace after the latest 180 seconds. If the neighbors are considerably disturbed by frequent false alarms, the external alarm must be switched off.
  • Visual alarm: The visual alarm is often used in shops during opening hours and to warn the surrounding area with a blink, flash or rotating light, but without putting the perpetrator in panic (see silent alarm ).

In addition, there are three types of alarms:

  • Internal alarm ( no external sounder, no notification outside of the object. , The internal alarm is mostly for testing, test alarms or problems used with arming )
  • External alarm (alarm with control of the signal generator )
  • Remote alarm (Mutual aid leis border points, there is the so-called alarm activation instead )
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