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Electrical stimulation drive method and system for prosthetic fingertip pressure and joint angle feedback

A joint angle and drive system technology, applied in the field of tactile feedback, can solve the problems of users' psychological conflict and low control accuracy of prosthetics, and achieve the effect of natural interaction, improved psychological feeling, and precise control.

Active Publication Date: 2021-02-02
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defects of users’ psychological resistance and low precision of prosthetic control caused by lack of feedback devices in existing prosthetics, the present invention provides an electrical stimulation driving method and system for prosthetic fingertip pressure and joint angle feedback

Method used

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  • Electrical stimulation drive method and system for prosthetic fingertip pressure and joint angle feedback
  • Electrical stimulation drive method and system for prosthetic fingertip pressure and joint angle feedback
  • Electrical stimulation drive method and system for prosthetic fingertip pressure and joint angle feedback

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Experimental program
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Embodiment

[0059] refer to figure 1 As shown in the schematic diagram of the structure, the system measures the joint angle and fingertip pressure of the artificial finger in real time through the optical fiber sensor 1 arranged on the five fingers on the front of the artificial hand, converts it into a photoelectric signal, and transmits it to the signal demodulator 2, and the signal demodulator 2 will The photoelectric signal is decoded and converted into angle and pressure values, and then transmits each value to the electric stimulation controller 7 through Bluetooth. The electric stimulation controller receives the angle of each knuckle and fingertip pressure value through the Bluetooth module. The stimulation controller generates a constant current with a specific stimulation frequency, and stimulates the upper arm of the user through the positive and negative electrodes fixed on the cuff 6 .

[0060] The cuff is tied to the upper arm of the user, and the user can feel the current ...

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PUM

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Abstract

The invention discloses an artificial hand fingertip pressure and joint angle feedback electrostimulation driving method and a system. The system comprises a pressure-angle measurement module and an electrostimulation controller, wherein the pressure-angle measurement module comprises an optical fiber sensor; the optical fiber sensor is used for measuring pressure and angle of each finger of artificial hand fingertips in real time and sending the pressure and angles to the electrostimulation controller; and the electrostimulation controller is used for receiving joint angles and fingertip pressure values of each finger, generating constant current of a specific stimulating frequency through a predetermined mapping relationship and stimulating an arm of an upper limb of a user through electrodes fixed to a cuff. According to the system, the user can better control an artificial limb to complete daily living actions, and meanwhile, a rejection mind of the user to the artificial limbs canbe reduced.

Description

technical field [0001] The invention relates to the technical field of tactile feedback, in particular to an electrical stimulation driving method and system for artificial fingertip pressure and joint angle feedback. Background technique [0002] Existing prostheses can meet daily needs, but generally lack feedback devices that can feed back information such as pressure on the prosthetic fingertips to the user. For users who lack feedback devices, they will not be able to obtain real-time information on the pressure on the prosthetic fingertips, Information such as temperature, on the one hand, prevents the control of the prosthesis from forming a closed-loop control and reduces the accuracy of control. On the other hand, the lack of pressure and temperature information of the user will cause psychological resistance to the user. Therefore, the feedback device on the prosthesis is particularly important. [0003] Existing feedback device as described in patent CN103720528 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/68
CPCA61F2/68A61F2002/6827
Inventor 张小栋蒋志明陆竹风孙沁漪张腾张毅
Owner XI AN JIAOTONG UNIV
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