Design and research of methane sensor based on TDLAS laser gas detection technology

At present, the laser methane sensors used in the market are designed according to the requirements of AQ 6211-2008 standard. Compared with the standard, there is still some room for improvement in detection accuracy, response time, and power consumption of laser methane sensors. Therefore, a new type of laser methane sensor based on TDLAS methane gas detection technology has been developed. By conducting error tests on three sensors, there is a good linear relationship between the sensor test values and the standard gas, indicating that the sensors have high testing accuracy. The power consumption of the sensor has been tested, and the maximum power supply distance can reach 6 km. Test the sensor response time for less than 15 seconds. The above indicators are all better than the standard requirements. The application of this sensor will improve the detection accuracy and stability of coal mine safety monitoring system, which is of great significance for ensuring coal mine safety production.