Active light source control circuit for explosion-proof occasion

Abstract

The invention discloses an active light source control circuit for an explosion-proof occasion. The active light source control circuit comprises an active light source key circuit, a stm32 single-chip microcomputer control circuit, a power supply circuit, a buzzer circuit, an LCD display circuit, an RFID radio frequency circuit and a 485 communication circuit. Online modification of on-site communication parameters, calling of equipment information and the like are achieved through the active light source key circuit, and the requirement for man-machine interaction in an explosion-proof occasion is met. The problems that the explosion-proof processing mode of a traditional contact type key is complex, the protection level is insufficient, and the service life is greatly influenced by theenvironment can be solved, physical contact is not needed, and the defect that a passive light source depends on natural light compensation is overcome. The problem of integration of an explosion-proof shell and an electrical part is solved, an operation panel is prevented from being exposed on the explosion-proof shell in a large area, and the problem of operation failure caused by dirt and rustspots easily generated on a contact type panel is eliminated. In addition, the threshold voltage can be flexibly changed, the key sensitivity can be adjusted, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of control circuits, in particular to an active light source control circuit used in explosion-proof occasions. Background technique [0002] With the continuous development of the smart storage area, more and more gas stations adopt the RFID card "one card" method to realize the automation of production management processes such as user billing, entry and exit of the storage area, automatic loading operations, and weighing, ensuring The efficiency and accuracy of information transmission in all aspects of production management can reduce human errors, improve production efficiency and facilitate vehicle management. The oil station storage areas are mostly explosive hazardous places, so it is necessary to protect the explosion-proof performance of on-site communication equipment (such as card readers and batch controllers). If the communication equipment circuit is not isolated and protected, in the event o...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an active light source control circuit integrated in communication equipment, which overcomes the problems of complex explosion-proof treatment methods for touch buttons, insufficient protection level, and greater environmental impact on service life in traditional communication equipment, and can solve the problem of The problem of integration of explosion-proof housing and electrical parts improves the performance of explosion-proof use, realizes "one-card" production management in explosion-proof places such as gas stations and depots, ensures the efficiency of information transmission and human-computer interaction in all aspects of production management, and reduces production costs. and maintenance costs

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