An electrical stimulation system based on multimodal sensory feedback

Abstract

The invention discloses an electrical stimulation system based on multimodal sensory feedback, which relates to the technical field of medical rehabilitation equipment and includes a sensor module, a digital signal processing module, a serial port transmission module and an electrical stimulation module; the sensor module is arranged on a prosthetic hand, The digital signal processing module is connected to the sensor module, receives various sensor signals collected and generates different electrical stimulation waveform codes through the transcutaneous electrical stimulation coding method based on multimodal sensory feedback, and then transmits them to the electrical stimulation module through the serial port transmission module , to perform real-time transcutaneous electrical stimulation on the evoked finger sensory area or alternative sensory area of ​​the amputee to form six different sensations of touch, pressing, buzzing, vibration, numbness, and pain. The present invention combines the application of electric stimulation and induced finger sensation area, can give users a real natural feeling, can be applied to the control of prosthetic hands, and also establishes the sensory feedback of pain, combined with the detection of temperature and humidity, can avoid Damage to the prosthetic hand.

Description

technical field [0001] The invention relates to the technical field of medical rehabilitation equipment, in particular to an electrical stimulation system based on multimodal sensory feedback. Background technique [0002] The development of prosthetic hands has a history of many years, but the assembly rate of prosthetic hands has not been effectively improved. At present, most amputees wearing prosthetic hands are decorative prosthetic hands for aesthetic purposes. To increase the utilization rate of practical prosthetic hands, the scientific and commercial circles have been investing a lot of effort in the development of the next generation of prosthetics, hoping to Improve the shortcomings of traditional prosthetic hands, increase practicability, and improve the acceptance of amputees for prosthetic hands. [0003] The patent with the publication number CN105640677 (invention patent name: an electrical stimulation sensory feedback system for prosthetic hand sensory feed...

AI Technical Summary

Problems solved by technology

[0005] (1) The existing non-invasive sensory feedback cannot achieve different proportions of sensory feedback, but can only achieve the judgment of presence or absence, and cannot judge the strength of the feeling

[0006] (2) The existing non-invasive sensory feedback can only receive pressure signals, the feedback mode is single, and there are no other types of signal input ports and multi-modal signal processing methods

[0007] (3) The existing prosthetic hand has no pain or warning feedback, and cannot achieve the human body protection mechanism established based on skin pain

[0008] (4) The existing system does not take into account amputees with incomplete induced sensory areas, who have no or only part of the induced digital sensory areas of the five fingers on the amputation stump

[0009] (5) The existing sensory feedback electrical stimulation system cannot realize multi-channel real-time signal conversion and real-time variable electrical stimulation output from the system design

[0010] (6) The existing temperature and humidity sensor detection method has low efficiency in detecting changing temperature, for example, the change rate of the temperature sensor is 1-2 degrees Celsius, which cannot meet the requirements of bionic sensory feedback

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