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Feature-vector-based rapid magnetic beacon orientation method and system

A eigenvector and optimal eigenvector technology, which is applied to measuring devices, surveying and navigation, instruments, etc., can solve the problems of low real-time performance and orientation accuracy, achieve the effects of fewer calculation parameters, improve real-time performance, and improve accuracy

Active Publication Date: 2019-09-06
HARBIN INST OF TECH
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Problems solved by technology

[0004] In view of this, the present invention aims to provide a method and system for fast orientation of magnetic beacons based on eigenvectors to solve the existing problems of low real-time performance and orientation accuracy

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  • Feature-vector-based rapid magnetic beacon orientation method and system
  • Feature-vector-based rapid magnetic beacon orientation method and system
  • Feature-vector-based rapid magnetic beacon orientation method and system

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Embodiment Construction

[0047] In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. Apparently, the described embodiments are only some embodiments of the present invention, rather than all embodiments of the present invention, and it should be understood that the present invention is not limited by the exemplary embodiments described here.

[0048] The magnetic beacon positioning technology mainly uses low-frequency alternating magnetic field as the signal source, and the low-frequency alternating magnetic field has strong penetrating power, and can maintain a stable positioning working state in some special environments such as underground and underwater. Moreover, in an isolated environment where there are obstacles such as walls and soil layers indoors, other signals such as WiFi and ultrasound will rapidly atten...

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Abstract

The invention, which relates to the technical field of positioning and orientation, provides a feature-vector-based rapid magnetic beacon orientation method and system. The method comprises: setting frequencies, amplitudes and phases of two paths of signals generated by a signal source and inputting the signals into a magnetic beacon generation space magnetic field; identifying a to-be-measured magnetic field signal; collecting magnetic field signals continuously and filtering the signals by using a bandpass filter to obtain magnetic field vector data of the two paths of signals; carrying outdenoising processing on the magnetic field vector data; carrying out multiplication crossing processing on the denoised magnetic field vector data to obtain feature vectors; carrying out spatial linear fitting on the feature vectors to obtain an optimal feature vector; and carrying out calculation based on the optimal feature vector to obtain a relative azimuth and a relative elevation angle of the relative magnetic beacon. According to the invention, the identification precision of the feature vector is improved by using the spatial linear fitting technique; and while the orientation accuracyis ensured, the real-time performance of the relative orientation calculation of the system is significantly improved.

Description

technical field [0001] The invention relates to the technical field of positioning and orientation, in particular to a method and system for fast orientation of magnetic beacons based on feature vectors. Background technique [0002] In many fields of modern life, navigation technology has become an indispensable part in every field. With the development of society, human activities are becoming more and more complex, which brings higher requirements for anti-interference, real-time, navigation accuracy and other aspects of the navigation system. Traditional navigation methods such as GPS cannot provide accurate positioning information in some special environments (in buildings or dense forests) due to the use of microwave signals. Related researches on using other signal sources for positioning and navigation emerged as the times require. Magnetic beacon positioning technology, which does not rely on external equipment or conditions of the positioning system during the po...

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Application Information

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IPC IPC(8): G01C21/00
CPCG01C21/00
Inventor 李清华李新年奚伯奇黄志威于文昭
Owner HARBIN INST OF TECH
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