基于TDLAS的矿用激光一氧化碳传感器的设计

The Design of Laser Carbon Monoxide Sensor for Mine based on TDLAS

摘要:

目前煤矿普遍采用基于电化学测量原理的一氧化碳传感器,为解决其在实际应用中存在的测量精度低、标校周期短、探头寿命短、易受背景气体干扰产生误报警等问题,本文设计了一种基于TDLAS的矿用激光一氧化碳传感器。该传感器采用更低功耗的垂直腔面发射激光器(VCSEL)激光器替代DFB激光器,以ARM和FPGA为核心,实现了一氧化碳的实时准确测量。测试结果表明,该传感器的基本误差不大于测量值的2%,响应时间小于15s,可靠性高,能有效解决电化学原理传感器现存的问题,对提升煤矿安全监测的可靠性,减轻传感器运维的工作量具有重要的现实意义。

Abstract:

At present, carbon monoxide sensors based on electrochemical measurement principle are widely used in coal mines. In order to solve the problems of low measurement accuracy, short calibration cycle, short probe life and false alarm caused by background gas interference, the paper designed a mine laser carbon monoxide sensor based on TDLAS.The sensor uses a lower power consumption VCSEL laser to replace the DFB laser. Meanwhile, it uses ARM and FPGA as the core, and realizes the real-time and accurate measurement of carbon monoxide. The test results show that the fundamental error of the sensor is no more than 2% of the measured value, the response time is less than 15s, and the reliability is high. It can effectively solve the problems existing in the sensor of electrochemical measurement principle. And it is of great significance to improve the reliability of coal mine safety monitoring and reduce the workload of sensor operation and maintenance.