Position calibration method, device and system

Abstract

An embodiment of the invention provides a position calibration method. The method comprises the following steps of detecting a wireless positioning signal sent by a peripheral anchor point of a terminal whose position is about to be calibrated; according to a detection result, acquiring wireless range finding values of at least three LOS anchor points corresponding to a terminal when moving on onemobile track, wherein a position point of the wireless range finding values of the LOS anchor points acquired on the mobile track is a LOS position point of the terminal, and the LOS anchor points are the anchor points which have an LOS diameter with the terminal at one LOS position point; taking the LOS position point of one terminal as a reference position point and acquiring shadow LOS anchorpoints of the other LOS anchor points relative to the reference position point except for a reference LOS anchor point; and calculating a coordinate of the reference position point according to the coordinates of the reference LOS anchor point and the shadow LOS anchor points and the wireless range finding values of each shadow LOS anchor point and the reference LOS anchor point to the terminal onthe reference position point.

Description

technical field [0001] The invention relates to the field of positioning, in particular to a position calibration method, device and system. Background technique [0002] Indoor positioning technology has broad application prospects in shopping malls, underground parking lots, warehousing and logistics, and smart factories. The current positioning technology is based on wireless signal measurement, such as positioning technology based on wireless signal strength, signal flight time, signal angle of arrival; there are based on various sensor information, such as based on inertial navigation sensors (accelerometer, gyroscope, magnetometer) ), geomagnetic, light, camera, sound sensor positioning technology. Among the above-mentioned positioning technologies, some accuracy is greatly affected by the environment, such as a system based on wireless signal measurement; some have strong environmental adaptability, but there is an error accumulation effect, such as a system based on...

AI Technical Summary

Problems solved by technology

The frequency / opportunity for the terminal to obtain position calibration depends heavily on the environment and the mobile trajectory of the terminal, and has great limitations in practical applications.

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