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

Abstract

The invention provides a DC motor speed control system and method based on surface electromyography signals. The system includes ECG electrodes, a preamplifier, a band-pass filter, a post-amplifier and a single-chip microcomputer; the ECG electrodes are arranged on human muscles. At the upper epidermis, the output end of the ECG electrode is connected to the input end of the preamplifier, the output end of the preamplifier is connected to the input end of the bandpass filter, and the output end of the bandpass filter is connected to The input end of the subsequent stage amplifier, the output end of the latter stage amplifier are connected to the single chip microcomputer, and the output end of the single chip microcomputer is connected to the drive circuit of the DC motor. This system can not only collect and amplify the voltage signals of human muscles during contraction, but also control the speed of the DC motor through the frequency band energy of the real-time output signal, so as to convert the size of the muscle contraction force into the speed of the device's movement. This system has the advantages of low cost, relatively simple structure and easy 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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