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					Title:
How Does A Motion Detector Work?


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281


Summary:
An alarm system is a great way to provide extra protection for your home. There are plenty of options
available for you to ensure your home’s safety. So don’t take chances. Protect your family with a home
security system that will safeguard your most precious valuables, and the people you love.



Keywords:
Motion Detector, Motion Detector Alarm, Motion Detector Camera, Detector, home security, sensors,
infrared sensors, alarm, vibration sensors, motion detection, Motion detectors



Article Body:
An alarm system is a great way to provide extra protection for your home. There are plenty of options
available for you to ensure your home’s safety. So don’t take chances. Protect your family with a home
security system that will safeguard your most precious valuables, and the people you love.


What are they?


Motion detectors spot the movement in areas covered by the security sensors. Motion detectors transmit
high frequency radio wave signals. They give a warning that someone is entering into your home.


Different kinds of motion detectors & how they work:


Infrared Sensors:


Motion detectors use infrared light to detect heat changes, i.e. when a person moves across this light it
detects them with the help of the infrared sensors. If a person moves in the range of the motion sensors, the
alarm is activated. Infrared sensors are cheaper than microwave sensors and ultrasonic sensors. Infrared
sensors are generally smaller and very reliable.



Vibration Sensors:


It detects a person through vibration. Many car alarms have this feature to alert the owner that something has
bumped into their car.
Photoelectric Sensors:


Some motion detection systems use lasers and photoelectric beams. The laser is shot across to the other side
of the room or doorway. If the laser is interrupted the unit's alarm signal is activated.



Ultrasonic sensors :


They use a frequency around 30kHz. The transmitter bounces the waves of walls, furniture, windows and
ceilings and when the room has stabilized, the alarm is armed.



Acoustic Sensors:


They can detect the energy produced by any kind of sound, including breaking glass. In the case of breaking
glass from window intrusions, the pattern of the sound emitted is detected.




gibson les paul standard

				
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posted:11/12/2011
language:English
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