Occupancy sensor based on Doppler technology and detection method thereof

Abstract

The present invention discloses an occupancy sensor based on Doppler technology and a detection method thereof. The occupation sensor comprises: a Doppler radar detection module configured to emit radio-frequency signals, receive echo signals reflected back after encountering a target object, generate Doppler frequency signals for describing motion of an object, and send the Doppler frequency signals to a circuit control module; and a circuit control module is configured to determine receiving signals and determine whether there are people in a given space or not so as to control an indoor device. The detection method comprises: emitting the radio-frequency signals through the Doppler radar detection module, receiving echo signals reflected back after encountering a target object, and generating the Doppler frequency signals for describing motion of an object and sending the Doppler frequency signals to the circuit control module; and receiving signals output by the Doppler radar detection module and performing determination through the circuit control module, and determining whether there are people or not in the given space so as to control the switching state of the indoor device. The detection range is enlarged, the timeliness and the accuracy of detection are ensured, and the occupancy sensor based on Doppler technology and detection method thereof have wide application range.

Description

technical field [0001] The invention relates to the technical field of energy saving, in particular to an occupancy sensor based on Doppler technology and a detection method thereof. Background technique [0002] With the increasing consumption of energy, especially fossil fuels, the two major issues of resource utilization and energy conservation have gradually been put on the agenda. As an important way to save energy, intelligent energy saving has been proposed, applied and continuously developed. my country is a big energy-consuming country. Whether it is for commercial use or civil use, the consumption of lighting, heating, ventilation, air conditioning, etc. cannot be ignored, and these facilities are mostly working in an unmanned state. Therefore, providing a Sensors that can sense the unmanned state and then automatically cut off the load power to achieve the purpose of energy saving are extremely important. This type of sensor is called an occupancy sensor. Current...

AI Technical Summary

Problems solved by technology

Compared with the infrared sensor detection method, although the ultrasonic sensor detection can detect small movements even behind obstacles, it also has disadvantages such as high cost and high false positive rate.

Moreover, the ultrasonic waves emitted by ultrasonic sensors may also cause interference to some hearing devices and other sensors, and even animals that can recognize ultrasonic waves

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