Greater Security With Modern Modular Burglar Alarm Systems
Many people today are concerned about the security of their homes. Some families have nobody home during the day, everyone is at work or school. Other people worry more about someone breaking in to their house at night when they are asleep. Burglar alarm systems are intended to address those fears by detecting and reporting apparent break ins or attempts at break ins.
Burglar alarm systems have sensors that are connected to a central control unit. The sensors are activated as needed. When they are active, if they detect a condition that could indicate a security problem, they notify the control unit. The control looks at the global pattern of which sensors are signalling what, and determines if there is a significant probability of a real problem. If so, it will raise an alarm, either locally, or at a centralized security station.
Indoor motion, or the presence of an unexpected person, can be detected in a number of different ways. The body heat of a person can trip a passive infrared detector. Emission fields are generated by microwave and ultrasonic sensors. Movement within the field changes it in a detectable way.
Breaking glass often indicates some sort of problem. Glass break detectors can sense the unique sound pattern associated with this. Some burglary alarm systems can detect threats other than burglary. Smoke, heat, or carbon monoxide detectors may detect a fire or carbon monoxide from a malfunctioning appliance.
Most home systems primarily use indoor sensors. A number of types of outdoor sensors are also available. Some of them are based on the technologies used for indoor systems. The usually sense efforts to go over or through a wall or a fence.
The sensors need to be able to talk to the control unit. Either wired or wireless technology may be used. Of course wired connections require running wires, but they do cover the power needs of the sensors. Wires can be cut. If there are frequent health check messages between the control and the sensors, cut wires can be detected and can trigger alarms.
Wireless connections require less work to install. There is no wire to run, and no wire to cut. Disrupting them requires knowledge of the specific wireless technology in use. The sensors will require either line power or batteries.
The control unit should be able to notify someone of problem conditions. Locally this can be done by a very noticeable light or an auditory signal such as a siren or buzzer. It may also send a message to the local police station or to an alarm company security station. In some cases, direct connection to the police may not be allowed.
The user must have some facility for turning the system on and off and for modifying the configuration. It is common to have different scenarios for night time, day time with people home, and all people gone. To avoid false alarms, it must be easy to tell the system when the last person leaves or the first person arrives.
This is a brief overview of how burglar alarm systems operate. A well tuned system can greatly enhance the security of the home. Once it is properly installed and configured, it should have very minimal impact on day to day living.
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