Real-time adaptive error calibration system for electromagnetic tracking

Abstract

The invention provides a real-time adaptive error calibration system for electromagnetic tracking. The system comprises at least one transmitting device, a transmitting antenna, at least one receivingdevice and a receiving antenna. Each transmitting devices matches the transmitting antenna and is used for transmitting a pulse positioning signal through the transmitting antenna, wherein the pulsepositioning signal is electromagnetically interfered in propagation in an environment. Each receiving device matches the receiving antenna, and is used for using a time-sharing receiving method to receive the pulse positioning signal carrying electromagnetic interference through the receiving antenna, and carrying out signal processing and error calibration to process the pulse positioning signalcarrying electromagnetic interference. Electromagnetic interference in the pulse positioning signal is removed to acquire a real pulse positioning signal. According to the invention, by using the acquired interference information, an error calibration module can eliminate interference noise in the positioning signal in real time; and the system is stable, efficient and real-time.

Description

technical field [0001] The invention relates to the technical field of communication positioning, in particular to a real-time self-adaptive error calibration system for electromagnetic tracking. Background technique [0002] In recent years, with the development of wireless communication technology, positioning technology has received more and more attention. However, due to the complexity of the application environment, commonly used high-frequency wireless signals have serious problems of multipath interference and attenuation, which affect the positioning accuracy. Low-frequency electromagnetic positioning technology detects the magnetic induction signal strength, locates the position parameters and attitude parameters of the target, has the advantages of fast speed, high precision, and the positioning effect is not affected by object occlusion, and the size of the sensor can be miniaturized and the cost is low, which is suitable for large-scale applications , has been ...

AI Technical Summary

Problems solved by technology

[0003] Although low-frequency electromagnetic positioning technology is not affected by object occlusion, when it is applied in environments with a large number of metal objects such as medical treatment, factories, warehousing, and logistics, the magnetic field signal will be distorted by environmental electromagnetic and metal interference, which will affect the positioning accuracy.

Especially in the application of metal logistics and storage environment, the positioning label needs to be fixed on the metal surface, which is easily affected by the magnetization effect of ferromagnetic objects and the eddy current effect of metal objects, resulting in positioning errors

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