Power module for sensors used in mine safety monitoring

Abstract

The invention provides a power supply module for a mine safety monitoring sensor, and the module is integrally encapsulated by using epoxy resins. The power supply module includes a soft-start circuit, an anti-interference processing circuit, a first power output circuit and a second power output circuit. A power input end of the soft-start circuit is connected with a DC9-24.5V power supply when in use. A power input end of the anti-interference processing circuit is connected electrically with a power output end of the soft-start circuit. A power input end of the first power output circuit and the power input end of the second power output circuit are both connected electrically with a power output end of the anti-interference processing circuit. The power input end of the anti-interference processing circuit is the power output end thereof. A power output end of the first power output circuit outputs a +3V DC power supply. A power output end of the second power output circuit outputs a +5.5V DC power supply. The invention is applicable to the mine safety monitoring sensor, can effectively improve the anti-electromagnetic and anti-interference capabilities of the sensor, and solves the problem of proneness to restart when the sensor is under interference.

Description

technical field [0001] The invention relates to the field of sensors used for mine safety monitoring, in particular to a power supply module of a sensor used for mine safety monitoring. Background technique [0002] Coal mines are usually equipped with a safety monitoring system. The first link of the safety monitoring system is a large number of various types of sensors such as carbon dioxide, carbon monoxide, methane and other gas sensors, temperature, temperature sensors, light sensors and so on. At present, many large-scale electrical equipment in coal mines are prone to interference such as group pulses and surges; the sensors used in coal mine safety monitoring systems usually use long-distance power supply, and their lines are susceptible to interference such as coupling and induction. In addition, the current coal mine underground safety monitoring system The sensor itself has poor EMC (electromagnetic compatibility) anti-interference performance. When the interferen...

AI Technical Summary

Problems solved by technology

At present, there are many large-scale electrical equipment underground in coal mines that are prone to interference such as group pulses and surges; The EMC (electromagnetic compatibility) anti-interference performance of the sensor itself is poor. When the interference is severe, it will automatically restart and cannot work stably, which seriously affects the overall anti-interference performance and working stability of the coal mine underground safety monitoring system.

The reason why the sensors used in the underground safety monitoring system of coal mines are not strong in anti-interference ability and have the phenomenon of automatic restart after interference is that the important reason is to meet the safety standards used in underground mines and pass mandatory product performance tests and explosion-proof In the test, the power supply module of the sensor usually adopts the structure of soft start module and DC / DC module, which does not have good anti-electromagnetic interference ability, and the underground sensor must be made into an intrinsically safe product, so it must have certain overvoltage and overvoltage protection. Flow protection capability, the negative effect of this design is that the sensor is prone to restart after being disturbed

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