motion detector


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motion detector

A device to detect intrusion within an area to be protected. The device radiates waves (electromagnetic or ultrasonic, at a fixed frequency) that are reflected back to the device. If an intruder moves within the protected space, a change in frequency results which is detected and which activates an alarm.
References in periodicals archive ?
Mr Jones said although the two appeared to take great care to avoid a motion detector inside the pub, they failed to notice the CCTV camera positioned outside.
The use of a motion sensor or motion detector in home security is essentially to sense an intruder and send an alert message to control panel that in turn alerts the monitoring center.
The radar motion detector can be set to trigger camera recording, activate a horn speaker, or switch on a light for deterrence and improved visibility on camera.
Having a motion detector connected wirelessly and ensuring long battery life is the ultimate challenge for designers.
The Reichardt motion detector [7] was thought to be the underlying model for motion detection in insects [8].
A motion detector willalso set off a beepingalarm were a child to be left behind and locked inside a school bus, as was the case withNizaha Alaa Ahmed, 3, who died in October 2014.
However, with the latest invention of a first motion detector by European researchers from Switzerland and Belgium, we may have come one step closer to finding the answers.
The colors indicate stop, go and warning conditions, and can be connected to a motion detector to act as a guide for drivers.
The system hibernates in a low-power standby mode until an external sensor, such as a motion detector or intrusion alarm, or a command from the central control room sends it a signal to wake up.
The Mace Wireless Home Security System includes a main control unit with a 105 dB alarm, one door/ window sensor, one motion detector sensor and a remote control with panic button.
An ultra-wideband motion detector for security applications developed by Auburn-based UltraVision Security Systems Inc.
The Ground Observing Reconnaissance Transmitter (GORT) from Cross Point Industries is equipped with a motion detector and high-powered light.