The design of mine-used infrared radiation thermometers shell for electromagnetic shielding

摘要

Mine high voltage power supply equipment on the hot temperature is too high, easy to cause the gas explosion accident, however the hot spot monitoring infrared thermometer surrounding is the existence of a large number of induced magnetic field, which influenced the temperature measurement accuracy, According to the infrared thermometer casing electromagnetic leakage, the shielding enclosure material of the infrared thermometer selected silicon steel, lens window electromagnetic leakage has become the main cause of the decline of electromagnetic shielding effectiveness. In the lens window with ITO film, after the simulation the shielding effectiveness achieves grade 50dB or above to meet the requirements of shielding effectiveness, and that improves the accuracy of temperature measurement.