In order to further improve the accuracy of the airflow test of coal mine ventilation fan,taking the demand for airflow testing of a round wind refuge in a coal mine as a starting point,we analyse the principle and problems of airflow measurement by the wind speed method;through a large number of tests,we obtain the corresponding wind speed measurement error of 4.4％when there is a bracket and no bracket,and we use the least square method to obtain the formula for the compensation of the wind speed error;we use the KV621-02 wind speed sensor and the PCI-6225 data acquisition card as the core to design the airflow testing system.After the test,the test system can reduce the measurement error of wind speed by 0.17 m/s,and the minimum relative error of the final wind volume test is only 0.12％.
NETL
NSTL
维普
万方数据
