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24G radar module

Radar principle:

Radar comes from English radar (radio detection and ranging). It is an electromagnetic wave sensor used to detect and locate reflective objects. Therefore, radar is also known as "radio positioning".

Existential sensing technology uses the Doppler principle to realize the application of microwave detection. When the wave of a certain frequency touches the detection target, some wave sources will be reflected back:

If the detection target is stationary, the wavelength of the reflected wave is constant; If the detection target moves towards the wave source, the wavelength of the reflected wave is shorter than that of the wave source; If the detection target moves away from the wave source, the wavelength of the reflected wave is longer than that of the wave source;

The change of wavelength means the change of frequency, and we can know whether there is the movement of objects. So as to detect the existence of no one, realize the effect of "people come to light, people go to light out", and achieve the purpose of intelligence and energy saving.

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