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 ?
A motion detector activated an alarm inside his duplex.
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.
A motion sensor is also known as a motion detector. It is usually embedded within consumer-end devices such as smartphones, smart TVs, tablet computers and physical security systems.
As he moves, the light triggers the motion detector.
Mike Hernandez said he woke up in the middle of the night to pings on his phone from his doorbell's motion detector, set off by a fire that started on his front porch around 3:30 p.m.
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.
Lighting can be controlled with a motion detector or a light switch, providing the benefits of a smarter home.
Having a motion detector connected wirelessly and ensuring long battery life is the ultimate challenge for designers, but that's not all.
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.
The system includes a base unit, automatic fall sensor, pendant, door contact, motion detector, and waterproof wall unit.
You can also use a wildlife camera (with motion detector) to take photos of the location and see what wildlife is revealed.

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