PLC programming controller of electric wheelchair

Abstract

The invention relates to a PLC programming controller of an electric wheelchair. The controller comprises a power control circuit and a digital operation and display control circuit. The power control circuit comprises a microprocessor DSP, a logic processing circuit, a power driving circuit, a motor, a current and voltage detection circuit, a communication module 1 and an electronic voice alarm and failure detection circuit. The digital operation and display control circuit comprises a single-chip microcomputer, a handle operating lever, a processing circuit, a loudspeaker I / O module, a button I / O module, a liquid crystal display and a communication module 2. According to the controller of the invention, a MOS pipe is used to carry out direction switching. There is no contact. The controller is safe and reliable. A service life is long and efficiency is high. A back electromotive force is used to measure a motor rotation speed. A measurement speed is fast. The structure is simple and maintenance is not needed. A MOS pipe internal resistor is taken as a current sampling resistor. An added sampling resistor is not needed. Heating is reduced and a detection speed is increased. A digital mode is used to carry out transmission. A line is simple and accurate.

Description

technical field [0001] The invention belongs to the field of electric wheelchairs, and relates to a PLC programming controller of the electric wheelchair. Background technique [0002] Our country attaches great importance to development, the cause of the elderly and the disabled. Caring for the improvement of the living standards of the elderly and the disabled, and promoting the development of a harmonious society. Electric wheelchairs are driven by batteries, which meet my country's environmental protection requirements and are green and environmentally friendly products. Electric wheelchairs can be divided into indoor and outdoor electric vehicles that travel long distances on ordinary roads. Their characteristics are the same as those of ordinary manual wheelchairs. The difference is that they are driven by electricity. The technical requirements have been clearly stipulated in the national standard GB / T12996-91 Various technical indicators. Electric wheelchair featu...

AI Technical Summary

Problems solved by technology

At present, the photoelectric electromagnetic encoder is used to measure the motor speed in China, and the frequency of the electromagnetic encoder needs to reach 2MHZ; the motor speed reaches 3000 rpm, and it needs 40K, that is, 40,000 pulses per revolution. It is difficult to manufacture a photoelectric digital disk, and the accuracy is difficult to guarantee.

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