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The following article was published in our article directory on October 16, 2012.
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Introduction to Wireless Burglar Alarms

Article Category: Advice

Author Name: Steve Holland

In modern human society, every individual needs to feel a sense of security. This especially applies to safeguarding ones life and property. Early human civilizations depended on animals, bells, whistles, bells, gongs, and fire to alert them of the existence of intruders or any other emergency. From these humble beginnings man eventually developed a simple electromechanical burglar alarm. Subsequent refinements in design introduced alarm systems utilizing sound waves, radio waves, light, and magnetic fields. One of the latest innovations is wireless burglar alarms.

Wireless burglar alarms utilize wireless technology to create a wire-free system which links individual devices to a central control unit. Wireless technology use radio waves as a means of passing information from one device to another and to a centralized system which controls all of the sensing devices. Essentially, a wireless burglar alarm system uses different types of sensors to detect intruders and uses radio waves to transmit signals to the central control unit which activates the alarm mechanism.

Each sensing device is assigned to a particular area. When an intruder passes through, the sensing device sends a signal to the central control unit. Each sensing device is uniquely identified by the central control system trough codes, allowing it to identify which part of the house or building the intruder entered or passed through. Since each individual sensing device is known only to the central control unit, any other unknown device which might be operating on the same frequency is disregarded. Hence, the central control unit only responds to a registered central device.

Wireless burglar alarms are cheaper to install compared to wired alarm systems because there is no need to install wiring, it required a lesser number of workers to install it, and it only takes a couple of hours to have it fully installed and operational. In comparison, wired systems require installation of wiring around the house or building, requires more manpower, and would take a few days to install, setup, and test the whole system.

Although individual sensors run on batteries, the central control unit is connected to the main AC power supply. In case of power interruption, backup batteries are in place to ensure continued operation. To ensure that each sensor is working, each individual device periodically sends out a signal to the central control unit. Using predefined codes, the central control unit can determine if a sensing device is running low on battery, malfunctioning, or being tampered with. The main control unit is usually installed in a central location to ensure that each individual sensor unit receives the strongest possible signal. To ensure a strong signal, any obstacle or source of interference is kept as minimal as possible.

Motion detectors utilized in wireless burglar alarms use passive infrared sensors which detect changes in the current room temperature. Upon sensing a change in temperature (such as when an intruder passes through), a signal is sent to the central control unit. Most motion detectors have an average range of 10 to 12 meters and can be fully integrated with other detectors such as pressure mats and vibration detectors.

Keywords: Wireless Burglar Alarms

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