Timing device, base station, positioning system, calibration method and positioning method

Abstract

The invention provides a timing device, a base station, a positioning system, a calibration method and a positioning method. The timing device comprises a processor and an ultra wide band UWB chip which are in communication connection. The UWB chip comprises a UWB clock, and the UWB clock crosses zero once every first preset time length; the processor comprises a timer, carries out zero-crossing detection on the UWB clock according to a second preset duration by the processor, and records the zero-crossing times of the UWB clock; the processor is used for obtaining the current time of the UWB chip, and obtaining the system time according to the current time, the zero-crossing frequency and the duration corresponding to each zero-crossing. According to the timing device provided by the embodiment of the invention, the precision of the timing device can be greatly improved, and in addition, the clock device can provide picosecond-level timing with atomic clock-like precision for a time-based positioning system. Based on the timing device, the invention provides a base station, a positioning system, a calibration method and a positioning method for realizing millimeter-scale positioning.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular, to a timing device, a base station, a positioning system, a calibration method, and a positioning method. Background technique [0002] In recent years, wireless positioning technology has been widely used in anti-lost, robot navigation and other fields. However, due to the limitations of the system clock and clock synchronization accuracy, the current wireless positioning accuracy is generally within the range of 0.3-10 meters. How to improve the clock and clock synchronization accuracy has become the key to improving the wireless positioning accuracy. [0003] At present, the method of clock synchronization is wireless clock synchronization through its own MCU system time, that is, the main base station periodically sends its own system time frame, and after receiving the time frame from the base station, it actively synchronizes to the clock of the main bas...

AI Technical Summary

Problems solved by technology

Due to the individual differences of a single base station, the delay of the base station to send and receive wireless signals is not easy, and a large clock synchronization error is introduced.

The cause of the error is mainly because the system clock inside the base station is not accurate enough

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