Method for detecting central position of person in swimming pool through active radio distance measurement

Abstract

The invention discloses a method for detecting the central position of a person in a swimming pool by means of active radio distance measurement. The method comprises the following steps: a to-be-detected person carrying a positioning label; setting an area with the center of the swimming pool as the circle center and the diameter within 3 meters as the central position of the swimming pool; setting a positioning label and at least four wireless positioning base stations as a unified timestamp; selecting ZigBee and ultrasonic signal transmitters as the positioning label and the wireless positioning base station; the plurality of wireless positioning base stations respectively transmitting first request frames to the positioning label, and the positioning label receiving the first request frames of the wireless positioning base stations, waiting for a time interval and replying a first reply frame through radio wave signals. The method has the advantages that the position of the swimmeris measured by utilizing the linearity and the constant speed of radio propagation, so that the distance between the swimmer and the boundary of the swimming pool is quickly calculated. At the same time, the radio transmission in the present application may be independent, reflective, re-transmitting radio signals at the same frequency or different frequencies.

Description

technical field [0001] The invention relates to the technical field of radio ranging, in particular to a method for detecting the position of a person in the center of a swimming pool by means of active radio ranging. Background technique [0002] In western developed countries, it is relatively common for ordinary people to have private swimming pools. With the gradual improvement of our home needs, with the advantages of cleanliness and sanitation, avoiding the trouble of cross-infection due to poor water quality in public swimming pools, the fashion of private custom-made private swimming pools is quietly emerging. Some changed private gardens into open-air swimming pools, some changed garages into indoor swimming pools, and some built rooftop sun pools. At present, it is not complicated to customize such a private swimming pool. Private swimming pools can be built in the garden, open space, roof and interior space of the duplex. In summer, family members can play games...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the device in the prior art that provides swimming current for the swimming pool cannot accurately identify whether the user is located in the center of the swimming pool, so that the rapid control of the direction and velocity of the current cannot be realized. The method of detecting the position of the person in the center of the swimming pool by means of ranging