What is the movement detector?
Motion detector is a device that monitors the field of view and performs a function if movement is detected in this field. The function could be the start of the door opening, as in the case of food store; Start a video tape machine for supervision; turn on the headlights; or sound alarm. Motion detector can detect movement with optics or acoustics and can be passive or active.
Passive infrared (PIR) Movement detectors are commonly used inside the houses associated with safety systems. The undisputed human eye does not see infrared light, but the human body generates an infrared signature in the form of heat. The passive movement detector does not issue signals, but monitors the visual field temperature and is looking for changes in the infrared spectrum. The human body moving around the field can trigger a movement detector to sound alarm, call a monitoring agency, or perform a different function. When used in conjunction with monitoring or safety systems, motodeoctors are just one part of the overall system. The simplest youThe active movement detector is commonly used in the commercial door to start the bell. The device is attached to one side of the door, the optical sensor to the other. The beam passes from the device to the sensor. When someone enters the device, the beam is broken and triggers the bell.
Another type of active movement detector is used in grocery stores to automatically open the door for customers. This type of movement detector emits radar pulses; Tracking the time that requires energy to bounce. When any object disrupts the radar reflection, the movement detector triggers the device that opens the door.
Other active movement detectors emit ultrasonic acoustic waves to detect movement. Any object moves the plane disrupts the acoustic signature and changes the image. The human ear cannot detect ultrasonic waves, but some animals are sensitive to ultrasonic signals.
someThe types of movement detectors turn on the headlights in the yard, driveway or veranda when movement is detected. After a period of time without movement, the light goes out. Some movement detectors can be set to be less sensitive to the movement of small animals.
Motion detectors can be purchased at home and online stores. If you are interested in a professional package for the home security system, the required movement detectors will be supplied with the system and other detectors are commonly available. Movement detectors are cheap devices that can add safety for a company or home and provide peace.