Research of oxygen concentration and temperature detection system

For problems that long response time, low precision and poor reliability of existing coal mine fire monitoring technologies, a oxygen concentration and temperature detection system was designed based on tunable laser absorption spectroscopy detecting technology. The system has been tested in laboratory. The test results show that the measurement error of the system is less than 1% when oxygen concentration is 0-100.0%, and the one is less than 2% when gas temperature is 253-1 000 K.