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Swimming attitude measuring method based on wearing-type sensor

A measurement method and sensor technology, applied in swimming, swimming parts, sports accessories, etc., can solve problems such as difficult to effectively capture the posture of swimming limbs

Active Publication Date: 2018-12-07
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention mainly solves the technical problem that the existing swimming motion measurement technology is difficult to effectively capture the posture of swimming limbs, and proposes a swimming posture measurement method based on a wearable sensor, which can capture the posture of the human body during swimming, and make different measured postures through kinematic analysis. The motion parameters of the swimmer's swimming posture are comparable to ensure the accuracy of the measurement

Method used

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Examples

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example 1

[0171] By binding the measurement nodes on the human body, the posture of any limb of the human body can be captured, especially the posture of the swimmer in the water cannot be seen intuitively with the naked eye, and the swimming posture measurement method of the present invention can be used to obtain the posture of the swimmer in the water. Taking the waist posture capture of a swimmer as an example, the process of capturing the partial posture of a swimmer in the present invention is explained.

[0172] Such as image 3 The hardware used in the present invention is shown in , including host computer, receiving node and measuring node. Before the swimmer wears the measuring node, the node needs to be waterproofed. Each measuring node contains an SD card, which can store a large amount of swimming data offline.

[0173] In this example, the waist model for the swimmer is a triangular hinge structure (such as Figure 4 Right side), where the center of the pelvis is taken a...

example 2

[0177] Compared with the traditional video and optical motion capture swimming posture, the present invention has the advantage that it is not limited by the environment in the water and the water surface, and can capture the whole body posture of the swimmer during the whole swimming process, and the measured human posture can be used for kinematic analysis. Taking the whole body posture of a swimmer as an example, the process of capturing the whole body posture of a swimmer in the present invention is explained.

[0178] The hardware used in the second example is the same as that of the first example, and the full body model of the swimmer is as follows Figure 4 As shown in (left side), this example adds the body vectors of the swimmer's limbs and torso, a total of 14 vectors. In the actual collection, the foot posture is not included in the measurement range, and the root node position is still at the center of gravity of the human body. The calibration of human body postu...

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Abstract

The invention relates to the field of human body movement recognition, and provides a swimming attitude measuring method based on a wearing-type sensor. The method comprises the steps that a moving signal and a magnetometer signal of limbs when a body stands and swims are collected by using the wearing type sensor respectively; the initial attitude of the limbs is obtained, correction is conductedon the initial attitude, and the corrected initial attitude is obtained; quaternion of a sensor coordinate system and a geographical coordinate system can be obtained through a gravity vector direction and a magnetic field north magnetic pole direction, and the quaternion is utilized to perform calibration on the body initial attitude and a biomechanic model, a complementary filtering algorithm is utilized to eliminate sensor error, and body swimming attitude updating is conducted by using the moving signal and the magnetometer signal in the swimming process. By means of the method, swimmingbody attitude can be captured, and the attitudes of swimmers are comparable through kinematic analysis.

Description

technical field [0001] The invention relates to the field of human motion recognition, in particular to a swimming posture measurement method based on a wearable sensor. Background technique [0002] Human motion analysis systems have been widely used in human-computer interaction fields such as medicine and sports. Among them, motion capture technology based on wearable sensors has become a major research hotspot this year due to its low cost and good adaptability in both indoor and outdoor environments. The swimming monitoring system is mainly used to measure various parameters that can reflect the performance of sports. Due to the good universality and scalability of wearable devices, wearable monitoring systems are receiving more and more attention and attention, and have broad applications in military and civilian fields such as fire rescue, pedestrian navigation, motion monitoring, and health care. Application prospect. [0003] When using wearable sensors to measur...

Claims

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Application Information

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IPC IPC(8): A63B71/06A63B69/14
CPCA63B69/14A63B71/0619A63B2208/03A63B2220/34A63B2220/80A63B2220/803A63B2220/836A63B2244/20
Inventor 王哲龙王佳鑫王英睿李杰
Owner DALIAN UNIV OF TECH
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