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A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors . PIR sensors are commonly used in security alarms and automatic lighting applications.
A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.
Doppler velocity sensor; E. Electromagnetic log; F. Floating car data; G. ... Wheel speed sensor This page was last edited on 28 November 2019, at 01:53 (UTC). ...
Speed sensors are machines used to detect the speed of an object, usually a transport vehicle. They include: Wheel speed sensors; Speedometers; Pitometer logs; Pitot tubes; Airspeed indicators; Piezo sensors (e.g. in a road surface) LIDAR; Ground speed radar; Doppler radar; ANPR (where vehicles are timed over a fixed distance)
Occupancy sensor types include: PIR sensors, which work on heat difference detection, measuring infrared radiation.Inside the device is a pyroelectric sensor which can detect the sudden presence of objects (such as humans) who radiate a temperature different from the temperature of the background, such as the room temperature of a wall.
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Stout said Texas troopers have engaged in roughly 500 high-speed pursuits in his border county alone this year, more than half of which exceeded speeds of 100 mph (160 kph).
The F-4 Phantom had a Texas Instruments AAA-4 infrared seeker [4] under the nose of early production aircraft F-4Bs and F-4Cs. It was not not installed on later F-4Ds due to limited capabilities, [ 5 ] but retained the bulge and indeed some F-4Ds had the IRST receiver retrofitted in a modified form.