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Three-dimensional motion tracking system and method based on inertial sensor and geomagnetic sensor

A geomagnetic sensor, inertial sensor technology, applied in signal transmission systems, instruments, ground navigation and other directions, can solve the problems of unavailability, affecting tracking results, poor tracking accuracy, etc., to achieve the effects of improved tracking accuracy, flexible application and low cost

Inactive Publication Date: 2010-11-17
WUHAN UNIV
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AI Technical Summary

Problems solved by technology

The main problem of this technology is that the sensors that measure speed and acceleration are all inertial sensors, and an inevitable shortcoming of inertial sensors is that there is cumulative error, and the system error generated during the working process of the sensor is amplified by the integral operation and will also affect the final result. Tracking results, resulting in poor tracking accuracy or even unusable

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  • Three-dimensional motion tracking system and method based on inertial sensor and geomagnetic sensor

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Embodiment Construction

[0038] Three-dimensional motion tracking is an important part of computer somatosensory control technology. If the tracking effect is not good, the user's action instructions cannot be correctly recognized, resulting in the failure of computer control. Existing motion tracking technologies either have high application costs or unsatisfactory tracking accuracy. The three-dimensional motion tracking system provided by the present invention uses an acceleration sensor, an angular velocity sensor and a geomagnetic sensor to track the motion of objects in three-dimensional space.

[0039] In order to facilitate understanding of the present invention, first the principle of the present invention is described in detail:

[0040] Establish a carrier coordinate system fixedly connected to the moving object with the moving object or the position to be tracked as the base point, and set up three acceleration sensors and three angular velocity sensors on the moving object along the three ...

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Abstract

The invention relates to the technical field of measurement positioning, in particular to three-dimensional motion tracking system and method based on an inertial sensor and a geomagnetic sensor. In the invention, the motion tracking is carried out by using a mode of combining the inertial sensor with the magnetic sensor; a stable calibration reference is constructed by utilizing the gravity acceleration and geomagnetic lines so as to further obtain an accurate object real-time attitude; and the interference with an output signal of an acceleration sensor from the gravity acceleration is rejected according to the real-time attitude to obtain accurate object motion acceleration data which is used for computing and acquiring object position information. By carrying out computing treatment on sensor data and accurate calibration on errors, the invention realizes the object positioning tracking in the three-dimensional space and has higher tracing precision and boarder popularization and application range.

Description

technical field [0001] The invention relates to the technical field of measurement and positioning, in particular to a three-dimensional motion tracking system based on an inertial sensor and a geomagnetic sensor and a method for realizing three-dimensional motion tracking. Background technique [0002] In order to realize the user's more precise and direct control of the computer, it is necessary to realize the accurate judgment of the human body's movement through technical means, and its technical basis can be simplified as the precise three-dimensional motion tracking of a certain point of the human body. At present, there are mainly the following technologies to realize the technical tracking of three-dimensional motion: [0003] ①Mechanical motion tracking [0004] Mechanical motion tracking relies on predesigned mechanisms to track and measure motion. The advantage of this technology is that the cost is relatively low, the tracking accuracy is relatively high, and r...

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Application Information

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IPC IPC(8): G01C21/16G01C21/08G08C17/02
Inventor 姜暄民赵俭辉袁志勇
Owner WUHAN UNIV
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