Open AccessResearch on Key Technologies of On-line Oxygen Concentration Measuring Instrument
Author(s) -
Yuanzheng Zhang
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1601/4/042038
Subject(s) - oxygen , limiting oxygen concentration , compensation (psychology) , pressure measurement , temperature measurement , oxygen pressure , materials science , environmental science , analytical chemistry (journal) , chemistry , thermodynamics , environmental chemistry , psychology , physics , organic chemistry , psychoanalysis
When applied in a coal mine, oxygen concentration monitoring will be affected by changes in temperature and pressure, which will cause large deviations in the measured values. In this paper, by integrating oxygen concentration monitoring, temperature monitoring, and pressure monitoring, by finding the functional relationship between the oxygen concentration monitoring value and the pressure value and temperature value at different pressures and temperatures, the effect of temperature and pressure changes on the measurement accuracy of oxygen concentration is eliminated. Based on the analysis of the influence of ambient temperature and pressure, a method of temperature and pressure compensation is proposed. It has been tested that the thermal stability time of the oxygen sensitive element is controlled within 30s, and within the range of (-10 ˜ 50) ° C and (50 ˜ 120) kPa, the measurement error of the compensated oxygen concentration is less than 2.5% FS.