Development of mine-used infrared carbon monoxide sensor based on mini pump suctio
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摘要: 现有基于电化学原理的矿用一氧化碳传感器测量数据易受烷类气体、氢气苯类等气体及矿井环境压力的影响，测量结果误差大，且需定期调校。针对该问题，研制了一种基于微型泵吸式的矿用红外一氧化碳传感器。该传感器基于非分散式红外吸收原理，利用CO气体对45 μm的红外辐射具有强烈的吸收，通过测量红外辐射的初始能量和红外辐射被气体吸收后的能量，检测出CO气体浓度。针对扩散式一氧化碳传感器检测采样速度慢，检测结果容易受检测环境的风速、温度等外界因素干扰的问题，采用微型泵吸式检测方式，气体通过微型气泵的流动进入红外敏感元件气室，保证了传感器气流的稳定性。6个月的工业性试验结果表明，该传感器相比传统电化学传感器，具有红外波长固定、测量数据不受其他气体影响的优势；使用中，矿用红外一氧化碳传感器的维护周期大于6个月，主要维护操作是清洁处理，无需更换敏感元件及标校。Abstract: The existing mine-used carbon monoxide sensor based on electrochemical principle is susceptible to the influence of alkane gases, hydrogen benzene and other gases and the environmental pressure of the mine. Therefore, the measurement results have large errors and need to be adjusted regularly. In order to solve this problem, a mine-used infrared carbon monoxide sensor based on mini pump suction is proposed. The sensor is based on the principle of non-dispersive infrared absorption. By using the fact that CO gas has strong absorption of 4.5 μm infrared radiation, the sensor detects CO gas concentration through measuring the initial energy of infrared radiation and the energy of infrared radiation after it is absorbed by the gas. The detection sampling speed of diffusion carbon monoxide sensor is slow, and the detection results are easily interfered by external factors such as wind speed and temperature in the detection environment. In order to solve the above problem, mini pump suction method is adopted. The gas flows into the infrared sensitive element gas chamber through the flow of the mini pump to ensure the stability of the sensor airflow. The 6-month industrial test results show that, compared with traditional electrochemical sensor, the sensor has the advantages of fixed infrared wavelength and the measurement data not being affected by other gases. During operation, the maintenance period of the mine-used infrared carbon monoxide sensor is longer than 6 months. The main maintenance operation is cleaning without the replacing sensitive elements and calibration.
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期刊类型引用(13)
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