依据过零极性相关测量方法的基本原理，研制成了在Ｚ—８０单板机上构成的过零极性相关器，并利用热线风速仪作为标定设备，进行了极性相关测量技术用于气体流速测量的实验研究。实验结果表明，用过零极性相关测量方法测单相气体流速是可行的。 Based on the basic principles of the zero-crossing-related measurement method, a zero-crossing polar correlator constructed on a Z-80 single-board machine was developed. A hot-wire anemometer was used as a calibration device and a polarity-related measurement technique was used for gas Experimental Study on Velocity Measurement. The experimental results show that it is feasible to measure the single-phase gas flow rate by using the zero-crossing correlation measurement method.