Single-base-station indoor positioning system and positioning method

Abstract

The invention belongs to the technical field of wireless communication positioning, and relates to a single-base-station indoor positioning system and a positioning method. The single-base-station indoor positioning system comprises a fixable or movable base station and a positioning label arranged on a target body, the base station is in communication connection with the positioning label, and the base station comprises a distance measuring module and a step length positioning module; the distance measuring module is used for measuring the distance between the base station and the positioning label, the step length positioning module is used for monitoring the real-time posture of a target body and calculating and monitoring the displacement of the target body through the step length, and according to the actual distance between the base station and the positioning label obtained by the distance measuring module, the action track of a monitored target body is obtained by combining the real-time posture and the step length of the target body measured by the step length positioning module. According to the method, indoor positioning is realized through a single base station, LoRa distance measurement and IMU step length positioning are used for correcting a positioning point, and LoRa is used for through-wall and long-distance communication.

Description

technical field [0001] The present invention relates to the field of indoor positioning, in particular to a single base station indoor positioning system and positioning method. Indoor positioning refers to the realization of position positioning in an indoor environment, mainly using various technologies such as wireless communication, base station positioning, inertial navigation positioning, and motion capture. Integrated to form a set of indoor position positioning system, so as to realize the position monitoring of people, objects, etc. in the indoor space. Background technique [0002] Indoor positioning refers to the use of WiFi, Bluetooth, ZigBee, RFID, CSS, ultra-wideband and other technologies to achieve position positioning in an indoor environment. Among them, in CSS and ultra-wideband wireless positioning systems, TDOA is widely used to complete the position calculation. TDOA estimates the coordinate value of the target node by measuring the time difference betw...

AI Technical Summary

Problems solved by technology

Since GPS / BD signals cannot be received indoors, it is necessary to establish a transmission network in the indoor environment, so that the positioned person / item can obtain positioning information. However, there are many signals such as Bluetooth and WiFi in the indoor environment, and the distribution of personnel is complex, so the transmission network will be affected. strong interference

At present, indoor positioning technology mainly relies on the arrangement of fixed base stations in a fixed scene in advance, which greatly reduces the flexibility and applicability of the system. Generally, there are many walls in the indoor environment, but the ability of the signal to penetrate the wall is limited, and the higher the frequency, the ability to penetrate the wall weaker

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