Multi-channel electrical stimulation system and stimulation method

Abstract

An existing commercialized prosthetic hand system has developed a more attractive appearance and enough driving degrees of freedom, and can meet the daily life of amputated patients, however, the existing commercialized prosthetic hand system generally lacks an effective sensory feedback function, and prosthetic hand equipment cannot be incorporated into proprioceptive mapping. On one hand, a disabled patient is easy to generate a control fatigue feeling and a psychological conflict emotion in the use process, so that the phenomenon that the use frequency of dexterous hand equipment is greatly reduced or the dexterous hand equipment is abandoned is caused; and on the other hand, the deficiency of multiple sensory feedback such as pressure sensation and position sensation also causes that the patient cannot make fine actions such as pinching, grasping and touching in real time, which becomes a key technical link urgently needing to be solved in the current artificial hand research field. The invention provides a multi-channel electrical stimulation system and stimulation method for dexterous hand touch sense and position sense feedback, which can output multi-channel portable electrical stimulation equipment with high real-time performance and wide frequency, and specially designs a multi-channel gating circuit for expanding the number of constant voltage source stimulation channels. The contradiction between the oversize circuit size and the portability requirement of an artificial hand system is solved; meanwhile, a current monitoring circuit is designed in a matched mode, and the current gathering phenomenon caused by skin impedance change or electrode falling is prevented.

Description

technical field [0001] The invention belongs to the field of prosthetic tactile feedback acquisition, and in particular relates to a multi-channel electrical stimulation system and an information feedback method suitable for dexterous hand tactile and positional feedback. Background technique [0002] Existing commercial prosthetic hand systems have developed a relatively beautiful appearance and enough driving degrees of freedom to meet the daily life of amputees. However, they generally lack effective sensory feedback functions and cannot incorporate prosthetic hand devices into proprioceptive images. On the one hand, patients with residual limbs are prone to control fatigue and psychological resistance during the use process, resulting in the phenomenon that the frequency of dexterous hand equipment is greatly reduced or abandoned; on the other hand, multiple sensory feedback such as pressure sense and position sense The lack of dexamethasone also makes it impossible for ...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the deficiencies in the prior art, the present invention provides a multi-channel electrical stimulation system for dexterous hand tactile and positional feedback, which can output high real-time, wide-frequency, multi-channel portable electrical stimulation equipment. Design a multi-channel gating circuit to expand the number of constant voltage source stimulation channels, and solve the contradiction between the excessive size of the circuit and the portability requirements of the prosthetic hand system; at the same time, match the design of the current monitoring circuit to prevent the current caused by changes in skin impedance or electrode shedding Aggregation occurs

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