Research on self-calibration carbon monoxide sensor for iron mines

In view of troubles like short calibration cycle, low intelligence, difficult maintenance, personnel operating error, etc. which exist in carbon monoxide sensor for iron mines, and on the basis of the principle of linear or near linear relationship between the output value of carbon monoxide sensitive element and the concentration of measured gas, method in which the calibration data are issued to each carbon monoxide sensor to carry out calibration according to time and location number via the upper computer, based on the data base being sorted out by the calibration data obtained by actual long-time calibration to the carbon monoxide sensor, is adopted, by combining with intelligent failure diagnosis circuit, a kind of self-calibration carbon monoxide sensor for iron mines is developed, which can carry out self-calibration to the element, and self-diagnosis for element damage, normal operation of power source, failures in short circuit, open circuit, communication signals of the circuit that integrating a variety of output standards. Through the field application test in Gongchangling underground iron mine, measurement error of the self-calibration carbon monoxide sensor for iron mines after automatic calibration can meet the actual requirement of iron mines; it can be more extensively popularized and applied.