Design of gas velocity sensor based on differential pressure zero self-calibration
The gas flow rate measurement equipment for coal mines mainly includes wind speed monitoring for coal mines and gas flow rate measurement for pipelines.It is one of the important monitoring parameters in the coal mine safety monitoring system and plays a pivotal role in ensuring safe production in coal mines.Currently,using conventional differential pressure methods to measure gas flow rates,there is a problem that the standard pressure measuring device is prone to clogging due to dust,water vapor,and the inherent unconventional,multivalued hysteresis nonlinear characteristics and zero point temperature drift characteristics of the differential pressure element itself also cause shortcomings such as insufficient accuracy and instability in the lower limit of measurement.Therefore,this paper proposes a differential pressure zero self calibration flow rate detection method,which essentially solves the problems of unstable measurement lower limit and low accuracy of micro differential pressure components under industrial and mining conditions,and realizes high-precision and accurate measurement of mine wind speed monitoring and pipeline gas flow rate.
万方数据
维普
