Communication driving circuit for mining diesel vehicle protection device

Abstract

The invention discloses a communication driving circuit for a mining diesel vehicle protection device, and belongs to the technical field of driving circuit design. The system comprises a chip U6 of a MAX3232IDR double-line driver and a receiver, an LCD display screen interface circuit, a 485 communication driving circuit and a CAN bus driving circuit. 485 signals are used for collecting information from the outside, converting the information into TTL signals, transmitting the TTL signals into a mine car mainboard, judging according to designed parameter safety values, transmitting alarm signals into an LCD (liquid crystal display) screen through an RS232 interface, and operating to complete the protection action of the mine diesel car. The chip U6 can convert the level of a logic signal of the single-chip microcomputer into an RS232 level, the LCD display screen interface circuit adopts an IO (input / output) mode to control an MOS (metal oxide semiconductor) tube to supply power to a control display screen, and the 485 communication circuit adopts TTL (transistor-transistor logic) and 485 isolation conversion and is provided with a special power supply. From the perspective of static interference resistance, echo interference suppression, surge voltage prevention and improvement of the communication speed of the driving circuit, the working performance of the mine truck protection circuit is improved.

Description

technical field [0001] The invention relates to the technical field of drive circuit design and acquisition, and more specifically, relates to a communication drive circuit used for a mine diesel vehicle protection device. Background technique [0002] In recent years, as the state has strengthened the monitoring of coal mine safety production, small and medium-sized coal mines have gradually enhanced their awareness of safety production. The application of mining diesel vehicles in mining operations has greatly improved production efficiency and safety, and at the same time reduced the labor intensity of workers. Therefore, diesel locomotives are widely used in coal mines. In order to ensure their safe, stable and reliable work, protective devices for mining diesel locomotives have emerged as the times require. [0003] The basic principle of the protection device is to compare the parameters that affect the use and safety status of the diesel vehicle with the set safety d...

AI Technical Summary

Problems solved by technology

However, the diagnostic system of this application has the disadvantages that the circuit design is relatively complex, and it is subject to electrostatic voltage interference and echo interference.

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