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High-precision positioning method applied to capsule endoscope

A technology of capsule endoscope and positioning method, applied in the direction of endoscope, application, positioning, etc., can solve the problems of positioning method positioning error, etc., achieve the effect of solving time delay and improving positioning accuracy

Active Publication Date: 2021-01-15
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention aims to solve is the problem of positioning errors in existing wireless capsule endoscope positioning methods, and provides a high-precision positioning method applied to capsule endoscopes

Method used

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  • High-precision positioning method applied to capsule endoscope
  • High-precision positioning method applied to capsule endoscope
  • High-precision positioning method applied to capsule endoscope

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Embodiment Construction

[0019] Since the TOA positioning technology uses the ranging method to calculate the position information of the wireless capsule endoscope, when the time of the receiving sensor and the wireless capsule endoscope is strictly synchronized, its positioning accuracy will be related to the measurement time received by the sensor. After analyzing the measurement time, the measurement time received by the sensor contains the time delay information of the wireless capsule endoscope, which has a certain impact on the positioning accuracy of TOA, so we propose an improved positioning algorithm , to solve the positioning error problem caused by time delay.

[0020] It is assumed that the time synchronization of each sensor receiving the signal of the wireless capsule endoscope is synchronized, and the synchronization between the wireless capsule endoscope and the sensor is also strictly synchronized. The time when the sensor receives the wireless capsule endoscope signal is recorded as...

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Abstract

The invention discloses a high-precision positioning method applied to a capsule endoscope, and the method comprises the steps: firstly calculating the position coordinates of a wireless capsule endoscope in two adjacent states through a TOA radio frequency positioning algorithm according to the known position coordinates of three base stations, and constructing six equations; constructing an equation by utilizing the measured distance difference and the actual distance difference in two adjacent states in the wireless capsule; and finally, solving the position coordinates of the two wirelesscapsule endoscopes without fixed delay errors in the adjacent states by combining the seven constructed equations. The method can effectively solve the problem of positioning errors caused by time delay, so as to improve the positioning precision.

Description

technical field [0001] The invention relates to the technical field of wireless capsule positioning, in particular to a high-precision positioning method applied in a capsule endoscope. Background technique [0002] Precise positioning of wireless capsule endoscopy (WCE) within the coiled, long and compact small intestine has been a challenge for researchers for more than a decade. In the positioning method of the wireless capsule endoscope, the magnetic positioning algorithm and the radio frequency positioning algorithm are mainly used. [0003] The magnetic positioning algorithm also includes permanent magnet positioning technology and electromagnetic positioning technology. The main problems of the algorithm based on magnetic positioning are: the distance between the wireless capsule endoscope and the sensor receiving the signal is highly sensitive, and the magnetic dipole model has a large positioning error; at the same time, additional energy is required to excite the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/06A61B1/04A61B1/045A61B1/31G06F17/12
CPCG01S5/06A61B1/041A61B1/045A61B1/31G06F17/12Y02D30/70
Inventor 段吉海朱岛杨海燕韦胶二彭双徐江
Owner GUILIN UNIV OF ELECTRONIC TECH