Speed sensor
Encyclopedia
Speed sensors are machines used to detect the speed of an object, usually a transport vehicle. They include:
- Wheel speed sensorsWheel speed sensorA wheel speed sensor or vehicle speed sensor is a type of tachometer. It is a sender device used for reading the speed of a vehicle's wheel rotation...
- SpeedometersSpeedometerA speedometer is a gauge that measures and displays the instantaneous speed of a land vehicle. Now universally fitted to motor vehicles, they started to be available as options in the 1900s, and as standard equipment from about 1910 onwards. Speedometers for other vehicles have specific names...
- Pitometer logsPitometer logPitometer logs are devices used to measure a ship's speed relative to the water. They are used on both surface ships and submarines...
- Pitot tubesPitot tubeA pitot tube is a pressure measurement instrument used to measure fluid flow velocity. The pitot tube was invented by the French engineer Henri Pitot Ulo in the early 18th century and was modified to its modern form in the mid-19th century by French scientist Henry Darcy...
- Airspeed indicatorsAirspeed indicatorThe airspeed indicator or airspeed gauge is an instrument used in an aircraft to display the craft's airspeed, typically in knots, to the pilot.- Use :...
- Piezo sensorsPiezoelectric sensorA piezoelectric sensor is a device that uses the piezoelectric effect to measure pressure, acceleration, strain or force by converting them to an electrical charge.-Applications:...
(e.g. in a road surface) - LIDARLIDARLIDAR is an optical remote sensing technology that can measure the distance to, or other properties of a target by illuminating the target with light, often using pulses from a laser...
- Doppler radarDoppler radarA Doppler radar is a specialized radar that makes use of the Doppler effect to produce velocity data about objects at a distance. It does this by beaming a microwave signal towards a desired target and listening for its reflection, then analyzing how the frequency of the returned signal has been...
- ANPR (where vehicles are timed over a fixed distance)
- Laser surface velocimeterLaser surface velocimeterA laser surface velocimeter is a non-contact optical sensor measuring velocity and length on moving surfaces. Laser surface velocimeters use the laser Doppler principle to evaluate the laser light scattered back from a moving object...
s for moving surfaces