DC motor speed control system and method based on surface electromyographic signals

Abstract

The invention provides a direct-current motor speed control system and method based on surface electromyogram signals. The system comprises an electrocardio-electrode, a pre-amplifier, a band-pass filter, a post-amplifier and a single-chip microcomputer, wherein the electrocardio-electrode is arranged on the upper epidermis of human muscle, the output end of the electrocardio-electrode is connected with the input end of the pre-amplifier, the output end of the pre-amplifier is connected with the input end of the band-pass filter, the output end of the band-pass filter is connected with the input end of the post-amplifier, the output end of the post-amplifier is connected with the single-chip microcomputer, and the output end of the single-chip microcomputer is connected with a driving circuit of a direct-current motor. The system not only can acquire and amplify voltage signals generated when human muscle contracts, but also can control the speed of the direct-current motor by outputting the frequency band energy of the signals in real time so as to convert muscle contraction force into device movement driving force. The system has the advantages of being low in cost, simple in structure and convenient to use.

Description

technical field [0001] The invention belongs to the technical field of human body electrophysiological signal detection and utilization, and in particular relates to a DC motor speed control system and method based on surface electromyography signals. Background technique [0002] The surface muscle electrical signal is the result of the comprehensive superposition of the electrical activity of the nervous system in time and space on the skin surface. It is a non-invasive detection of bioelectrical signals, and has a wide range of applications in understanding and understanding the information transmission of the human nervous system, basic medical research, clinical diagnosis, sports medicine and rehabilitation engineering. However, the currently used surface electromyography signal acquisition devices are generally expensive, and most of them are inconvenient to use, which brings a lot of inconvenience to the development and use of the electromyography control system. In ...

AI Technical Summary

Problems solved by technology

However, the currently used surface electromyography signal acquisition devices are generally expensive, and most of them are inconvenient to use, which brings a lot of inconvenience to the development and use of the electromyography control system

In addition, the current main control method is the control method based on threshold decision-making. In this control method, the surface myoelectric signal is equivalent to a switch. When some characteristic values ​​of the myoelectric signal exceed a certain threshold, it is judged that there is an action to be executed. , otherwise it is judged as no, and then the start and stop of the equipment motor is controlled by the judgment result. Under this control method, it is difficult to use the surface electromyographic signal to control the movement speed of the equipment

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