What is a Motion Detector?
An electronic motion detector contains a motion sensor that transforms the detection of motion into an electric signal. This can be achieved by measuring optical or acoustical changes in the field of view. A motion detector may be connected to a burglar alarm that is used to alert the home owner or security service after it detects motion. Such a detector may also trigger a red light camera. An occupancy sensor is a motion detector that is integrated with a timing device. It senses when motion has stopped for a specified time period in order to trigger a light extinguishing signal. These devices prevent illumination of unoccupied spaces like public toilets. Motion detectors are in use all around us in both residential and commercial locations. There are many common uses for motion detectors that most people find convenient and helpful in very common, everyday situations, and there will be some new and innovative uses that we may see more and more of in the future. Residential Uses Resi
A motion detector is a device that monitors a field of view and performs a function if motion is detected within that field. The function might be to trigger the opening of a door, as in the case of a grocery store; start a videotape machine for surveillance; turn on floodlights; or sound an alarm. A motion detector might detect motion through the use of optics or acoustics and can be passive or active. Passive infrared (PIR) motion detectors are commonly used inside homes, linked to security systems. The unaided human eye cannot see infrared light, but the human body generates an infrared signature in the form of heat. A passive motion detector does not emit signals, but monitors the temperature of the field of view looking for changes in the infrared spectrum. A human body moving through the field can trigger the motion detector to sound an alarm, call a monitoring agency, or perform another function. When used in conjunction with surveillance or security systems, motion detectors ar
