Wireless ranging node and wireless ranging method

Abstract

The invention discloses a wireless ranging node and a wireless ranging method. The wireless ranging node comprises a central processing unit, a Chirp signal radio frequency unit, a radio frequency front end unit, a power supply unit, a sensor unit and a data communication unit. The Chirp signal radio frequency unit is used for mutual conversion between digital signals and radio-frequency signals, the radio frequency front end unit is used for amplifying and filtering Chirp signals, the power supply unit is used for supplying a working power supply, and the sensor unit is used for providing node information. According to the wireless ranging node, the sensor unit informs the central processing unit of a motion state of the whole node, and the central processing unit controls the whole node to enter a working state with low power consumption at a proper moment. The wireless ranging method improves ranging accuracy of SDS-TWR through the characteristic that an actual time interval for continuously sending data two times between two nodes is equal to a time interval for continuously receiving the same data two times and through the method of figuring out clock offset of the two nodes with a time deviation formula of the SDS-TWR method.

Description

technical field [0001] The invention relates to a wireless ranging device and a ranging method thereof, in particular to a wireless ranging device node and a wireless ranging method based on the node, belonging to the field of wireless ranging. Background technique [0002] Wireless sensor localization technology is one of the key technologies of wireless sensor network, and distance-based localization methods generally have higher accuracy than non-distance-based methods. Focus on the analysis of ranging methods. At present, common ranging methods include measuring signal arrival time, arrival time difference, received signal strength indication, and arrival angle. The carriers of ranging signals mainly include ultrasonic waves, lasers, infrared rays, and electromagnetic waves. [0003] At present, many wireless sensor nodes use ultrasonic technology for ranging. However, because ultrasonic waves are easily affected by many external factors such as ambient temperature, wi...

AI Technical Summary

Problems solved by technology

Ultra-wideband can be used for indoor precise positioning, such as the position discovery of soldiers on the battlefield, robot motion tracking, etc., but due to its ultra-wideband characteristics, the frequency band used is often high, the signal penetration ability is poor, and the signal cannot resist occlusion

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