Abstract
According to serious environment in the coal mine, the safety monitoring system of communication equipment (KJJ137 Switch Of Intrinsically safe flame-proof in mine) susceptible to surge, the group of pulse, and the problem of various kinds of electromagnetic interference on the switches EMC research. The study mainly from the power supply isolation and anti-interference, output signal safety barrier, the whole machine technology research aspects such as antistatic treatment. Experiments show that KJJ137 switches through the power surge immunity experiment, the output signal of pulse noise immunity, electrostatic immunity experiment machine. Various EMC experiment achieves level 4 standard, beyond the coal mine safety regulations require all kinds of interference rejection level 3 standards, make KJJ137 Switch Of Intrinsically safe flame-proof in mine, suitable for all kinds of bad environment of coal mine, ensures the mine safety monitoring system is right.
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