Positioning system and positioning method of indoor high-density mobile tags

Abstract

The invention discloses a positioning system and a positioning method of indoor high-density mobile tags. The positioning system comprises a positioning server, an Ethernet switch, a synchronous clockcontroller, anchor nodes and tag nodes; an LF and UWB double-frequency communication mode is adopted between the anchor nodes and the tag nodes, UWB realizes uplink communication from the tag nodes to the anchor nodes, and LF realizes downlink communication from the anchor nodes to the tag nodes; the positioning server, the synchronous clock controller and the anchor nodes are communicated via awired Ethernet, and the positioning server, the synchronous clock controller and the anchor nodes are respectively connected with the Ethernet switch; and the synchronous clock controller is connectedwith each anchor node, provides a UWB transmitting-receiving circuit clock for each anchor node and finishes synchronization of positioning timers among all the anchor nodes in the system. Accordingto the positioning system and the positioning method of the indoor high-density mobile tags, advantages of LF and UWB are combined, the bandwidth required by UWB positioning communication is reduced,and power consumption of mobile tags is reduced.

Description

technical field [0001] The invention relates to the technical field of indoor mobile tag positioning, in particular to an indoor high-density mobile tag positioning system and positioning method. Background technique [0002] The outdoor positioning technology based on the satellite positioning system is very mature. Since the satellite positioning data cannot be received indoors, satellite positioning technologies such as GPS and Beidou cannot be used, and other technologies must be used for indoor positioning. Ultra Wide Band (UWB, Ultra Wide Band) technology has been applied in communication and positioning due to its strong anti-interference ability, but the UWB positioning method based on two-way ranging (TWR, Two-Way Ranging) usually has a large amount of communication and time-consuming communication. Due to the need to know the addresses of both parties (anchor node and mobile label node), TWR technology has disadvantages such as low density of supported mobile label...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems that TWR cannot adapt to indoor high density and high power consumption, etc., the present invention proposes an indoor high-density mobile tag positioning system and positioning method, a positioning method based on a time difference of arrival (TDOA, Time Difference of Arrival) of a two-way dual-frequency communication mechanism, Combining the advantages of both LF (Low Frequency) and UWB, it reduces the bandwidth required for UWB positioning communication and reduces the power consumption of mobile tags

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