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Upper limb functional movement monitoring system and method based on fabric sensor

A fabric sensor, motion monitoring technology, applied in the direction of sensors, diagnostic recording/measurement, medical science, etc., can solve the problems of flexibility, concealment, comfort, inability to truly reflect the movement process of limbs, falling off and other problems that do not meet the real-time monitoring mode. , to achieve the effect of wearing comfort and concealment, low production cost, and enhanced stability

Active Publication Date: 2016-01-27
ANHUI HENGYI TEXTILE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the one-dimensionality of the sensing elements, the detection methods described in these studies can only reflect the bending motion of the limbs—this single motion
In addition, in the test methods described in these studies, the signal lead-out lines between the conductive fabric and the signal acquisition equipment are often fixed by sticking, reed, etc., and there are problems that they are easy to loosen or even fall off during repeated bending movements of the limbs.
[0005] To sum up, judging from the current methods of body motion detection, patent statements and methods proposed in research reports, there are two deficiencies: either the material rigidity of the sensing element and signal transmission line is far higher than that of conventional clothing materials, and it does not meet the requirements for The flexibility, concealment and comfort of the wearable medical real-time monitoring mode; or the monitored movement mode is single, which cannot truly reflect the process of limb movement, such as bending and rotation
In view of the deficiencies of the existing limb function movement monitoring technology in long-term wearable medical monitoring applications, this invention will use conductive textile materials as sensing elements to monitor human body movement, and solve the problem of fixing sensing elements, easy falling off of signal transmission lines, and easy Looseness and other issues

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Upper limb functional movement monitoring system and method based on fabric sensor
  • Upper limb functional movement monitoring system and method based on fabric sensor
  • Upper limb functional movement monitoring system and method based on fabric sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Responses of fabric resistance to quasi-static bending of limbs at different angles.

[0050] When the arm is naturally drooping, the bending angle is 0°, and the bending angle of the upper limbs is incremented or decremented by 20°, first increasing from 0° to 120°, testing for 5 cycles, and calculating the resistance corresponding to each angle under 5 cycles average of. The angle-resistance equation is obtained by linear fitting, such as Figure 5 Shown, where the sum of squared differences (R 2 ) is equal to 0.95, which shows that the linearity of the fabric resistance response at different angles is good.

Embodiment 2

[0052] The upper limbs do cyclic bending movements at different speeds, and the Bluetooth data acquisition card continuously collects the voltage changes at both ends of the conductive fabric. The movement of upper limbs is reflected by the change of voltage. Such as Figure 6 As shown, the arm bends at three different speeds, from Figure 6 (a)~ Figure 6 (c) The bending speed increases sequentially. From Figure 6 It can be seen that as the arm bends the voltage across the fabric decreases and the arm straightens the voltage increases. At the same time, when the speed increases, the number of waveforms in the same time increases. This shows that such a test system can not only reflect the trend of upper limb bending movement, but also reflect the speed of movement through the number of waveforms per unit time.

Embodiment 3

[0054] The upper limbs do intermittent bending exercises. The upper limbs first do a few circular bending exercises, then the arms are in a natural drooping state for a period of time, and then continue to do circular bending exercises. From Figure 7 It can be seen from the figure that the voltage signal generates a waveform when the arm is bent; Figure 7 P in the middle means that when the arm is still, the voltage signal is almost in a straight line without any change. This shows that the test method can reflect the movement state of the limbs.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The present invention provides an upper limb functional movement monitoring system and method based on a fabric sensor. The system comprises a signal generating device which comprises a conductive fabric with a signal transmission line which is connected to a button battery, a signal collection and transmission device which collects a voltage signal and sends the signal to a signal receiving and displaying device, the signal receiving and displaying device which receives the voltage signal, carries out functional movement characterization on the signal, displays a functional movement state in real time at the same time, stores data and carries out imaging, wherein the conductive fabric is close to a body upper limb elbow joint, and an upper limb movement stretches the conductive fabric such that the voltage signals at two ends of the conductive fabric are changed. The invention also provides the upper limb functional movement monitoring method based on the fiber sensor. The upper limb functional movement monitoring system and the method have the advantages of low cost, good stability, high sensitivity and strong adaption ability, at the same time a sensitive element can be integrated to the daily clothes, and a basis is provided for biomechanics analysis of human body upper limb movement.

Description

technical field [0001] The invention relates to an upper limb movement monitoring system and method based on polypyrrole conductive woven fabric as a sensing element, and belongs to the technical field of wearable intelligent textiles. Background technique [0002] Limb movement status testing has important applications in rehabilitation medicine, sports and other fields. For example, in some sports training, motion signals are used to identify deficiencies of athletes in training, so as to guide the later training purposefully; in the field of rehabilitation medicine, motion signals are used to detect the recovery process of patients. Currently, motion capture systems consisting of accelerometers, flexible electric goniometers, and cameras have been used to monitor human motion. Successfully developed products include a series of VICON motion analysis systems launched by the Oxford company in the 1980s, which have been widely used in many developed countries. This system ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): A61B5/11
Inventor 胡吉永张晓峰周淑雯史俊辉杨旭东丁辛
Owner ANHUI HENGYI TEXTILE TECH CO LTD
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