How motion sensor works and application?

Question

Motion sensor.What's are it's uses and how it works?

Answer 1

One of the most common ones is the PIR detector used to turn lights on when motion is sensed. These usually have a cylindrically curved plastic window having a milky color.

A PIR sensor means a Pyroelectric InfraRed sensor. So it is detecting infrared radiation emitted by warm bodies. The detector substance is usually PZT (lead ziconate titanate) or similar materials.

PZT materials are usually used for piezoelectric devices such as acoustic sensors or spark generators. However, they also generate big electric charges when stimulated by small temperature changes.

In a PIR, a flat panel is made with vertical stripes of thin PZT material. Each stripe is electrically connected to a sensitive ammeter. In front of the sensing panel is a cylindrical IR lens that focuses an IR image onto the sensing panel.

If a warm body moves, then its image moves onto or off-of one of the sensing stripes causing a small current. The ammeter detects this and triggers the switch.

Answer 2

If the mushy is on all nighttime, then that's not a action sensor. If that's a action sensor, then that's conceivable to 'mask' certain zones on the sensor to maintain it from triggering as genuinely or fairly factors. yet, to attempt this your self, devoid of the neighbor's recognize-how, is likewise established as trespassing on deepest sources and is a criminal offense. Please in simple terms attempt to paintings it out peacefully first.

Answer 3

define the application first. then select the proper motion sensor. there are many forms of this device.

Answer 4

Some of the most sensitive is laser that looks for the Doppler.

Answer 5

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