Design of Automatic Calibration Device for Thermal Ignition Test based on Safety Margin

Automatic calibration device for thermal ignition tests is verification equipment for thermal ignition test of all small components above the temperature group in the explosion-proof electrical equipment required by IEC standard, the safety margin, performance parameters and control mode have important influence on the safety, stability and sensitivity of the whole system. In order to optimize test flow and improve verification efficiency, the automatic calibration device based on safety margin is designed in this paper. The hardware of the system is realized by means of electric control and sensor technology, which combines thermal ignition evaluation with experimental verification, software system adopts configuration monitoring and process control technology for modularization and partition design, can dynamically display test action, and automatically detect and control. According to the operation and experimental data, the safety margin stack and automatic calibration of thermal ignition test are realized, the repeatability of sensitivity measurement is 0.59%.