Holding speed controllable intelligent myoelectric prosthetic hand control circuit
A controllable, prosthetic hand technology, applied in the field of intelligent myoelectric prosthetic hand control circuit, can solve the problem that the prosthetic hand cannot control the speed according to the patient's wishes, and achieve the effect of improving controllability
Active Publication Date: 2014-06-18
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology
[0004] The present invention aims at the problem that the current prosthetic hand cannot control the speed according to the patient's will, and proposes a controllable grip speed intelligent myoelectric prosthetic hand control circuit. The patient can change the strength of the myoelectric signal according to his own wishes. The grip speed of the prosthetic hand brings great convenience to the user of the prosthetic hand
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[0011] The introduction of good myoelectric signals is the first prerequisite for myoelectrically controlled prosthetic hands, such as figure 1 A block diagram of the electrode section is shown. The function of the high input impedance buffer amplifier 1 is to reduce the attenuation of the high impedance muscle bioelectric signal introduced by the electrodes. The differential amplifier has a high common-mode rejection ratio and amplifies the differential signal from the output of the high input impedance buffer amplifier to obtain a single-ended output signal. Amplifier 1 is an adjustable gain amplifier for adjusting the amount of amplification of muscle bioelectric signals. The 50Hz notch filter is used to suppress power frequency interference signals. A buffer amplifier 2 is arranged between the 50Hz trap and the subsequent circuit to reduce mutual influence. After this link, the EMG signal is initially amplified and processed.
[0012] After the above-mentioned amplific...
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The invention relates to a holding speed controllable intelligent myoelectric prosthetic hand control circuit. After being preliminarily amplified and processed via an electrode circuit, high-impedance muscle bioelectrical signals led into the electrode circuit by an electrode are transmitted to an amplifying circuit to be amplified further and then transmitted to a control driving circuit, and a single chip microcomputer outputs control signals to the driving circuit to control a direct-current micromotor of a prosthetic hand. Proportional adjustment of holding speed of the prosthetic hand is realized, a patient can change the holding speed of the prosthetic hand via strength of myoelectric signals according to self wish, accordingly the holding speed controllable intelligent myoelectric prosthetic hand control circuit brings great convenience for the user, and controllability of the prosthetic hand is improved.
Description
technical field [0001] The invention relates to an artificial hand, in particular to an intelligent myoelectric artificial hand control circuit with controllable grip speed. Background technique [0002] Electromyogram (EMG) is the physiological electrical signal generated during muscle movement. Surface Electromyogram (SEMG) refers to the electromyographic signal collected on the surface of the skin, which is the comprehensive result of the superficial muscle and nerve movement of the human body. Its main features are: First, the signal amplitude is small. Usually in the tens of microvolts. The second is that the signal frequency is in the low frequency range (10Hz-500Hz). Although the amplitude of the EMG signal is very small, it contains a wealth of information, including the movement pattern and movement speed of the human hand. Years of research by experts in this field have shown that myoelectric signals are currently the most ideal source of prosthetic hand contro...
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IPC IPC(8): A61F2/72
Inventor 何荣荣喻洪流官龙
Owner UNIV OF SHANGHAI FOR SCI & TECH