Multifunctional integrated bird repellent device
A bird repellent, multi-functional technology, applied in instruments, animal repellants, measuring devices, etc., can solve problems such as noise pollution, troubles, and reduced repelling effect of bird repellents
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[0016] 1. Radar detection,
[0017] The present invention utilizes Doppler radar sensor and discriminating circuit, is specially used in detecting the activity of bird, when detecting and analyzing that there is bird within the range of repelling bird, trigger voice circuit to generate explosive sound to drive away bird class leaves.
[0018] Doppler theory is based on time, when a radio wave hits an object as it travels, the wave reflects. The frequency of the reflected wave changes with the moving state of the object. If the position where the radio wave hits an object is fixed, the frequency of the reflected wave should be equal to the frequency of the emitted wave. If you move in the direction of emission, the reflected wave will be compressed, which means that the frequency of the reflected wave will increase. Conversely, when the object moves toward the direction of the principle emission, the frequency of the reflected wave will decrease accordingly, which is the Dop...
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