煤矿井下粉尘和瓦斯环境模拟校验装置

Design of Environment Simulation and Checking Device for Dust and Gas in Coal Mine

设计制做了一个可以产生粉尘和甲烷并控制湿度的新型球型环境模拟舱,用来校验仪器并对干扰因素分析解耦。通过气溶胶发生器发生的NaCl颗粒来模拟粉尘,再混入低浓度的甲烷,通过内置的风扇搅拌均匀,再通过Zigbee无线技术将内置的传感器得到的湿度、甲烷浓度信号传给STM32单片机,再由单片机传给上位机的Labview上显示并控制球舱里面的湿度、甲烷浓度。结果表明球舱内颗粒物浓度均匀性良好,重复性误差不超过6%。湿度范围在10%～90%可控,甲烷浓度均匀并在1%以下可控。

A new spherical environment simulation cabin was designed, which can produce dust and methane and control humidity. It is also used to calibrate the instruments and decouple the interference factors. The aerosol generator produces NaCl particles to simulate the dust, then mixes with a certain concentration of methane, stirs evenly through the built-in fan, then transmits the humidity and methane concentration signals from the built-in sensor to STM32 MCU by Zigbee wireless technology, and then transmits them to Labview and controls the humidity and methane concentration inside. The results showed that the particle concentration uniformity in the cabin was good, and the repeatability error was less than 6%. The humidity range was controlled between 10% and 90%, and the methane concentration was uniform and controlled below 1%.