Microwave sensor signal processing method for lighting device

Abstract

The invention discloses a signal processing method of a microwave sensor of a lighting device, which comprises: acquiring a sensing signal collected by a microwave sensing head; calculating a spectrum value of the sensing signal; reading a microwave sensing sensitivity trigger threshold; and comparing the spectrum value of the sensing signal and the size of the trigger threshold; when the spectrum value is higher than the trigger threshold, control the lighting device to turn on the lighting; when the spectrum value is lower than the trigger threshold, mark this spectrum value as an invalid spectrum value and store it in the register; calculate the invalid spectrum value in the register The average value of the average value is used as a new microwave induction sensitivity trigger threshold after gaining the average value. The sensitivity trigger threshold of the present invention changes dynamically with the energy of the noise spectrum, so that the sensor can be applied to different environments and eliminate differences caused by hardware, so as to maintain high sensitivity and prevent erroneous actions.

Description

technical field [0001] The invention relates to the field of induction lighting, in particular to a microwave sensor signal processing method of an lighting device. Background technique [0002] With the wide application of microwave sensors in the field of automatic lighting control, while bringing great convenience to people, there are also some application defects. Due to the differences in the production of microwave induction heads and the consistency of components, under the same environmental conditions, some products have high sensitivity, while others have low sensitivity. In addition, in actual use, some sensors may malfunction due to environmental interference. In the prior art, it is usually necessary to manually adjust the sensitivity knob to compensate for product consistency and environmental interference. This undoubtedly increases the circuit cost of the product, and also brings a lot of inconvenience to testing and use. [0003] The sensitivity control i...

AI Technical Summary

Problems solved by technology

However, the sensitivity trigger threshold of this method cannot be adjusted. The sensitivity of each product under the same environmental conditions can only be adjusted manually by the sensitivity knob. If the knob is not set properly, it will cause false triggering or insensitivity problems.

Images