本文介绍用热膜流速仪测量非恒定管道流的流速分布估算理论与试验。在测量过程中,我们使信号处理模型公式化,同时把卡尔曼技术应用于信号处理之中。滤波器是在个人计算机上实现,並在该机 CRT 显示屏上实时获得速度分布的成功估算值。这种测量非恒定流的方法为制造具有高动态精度、计算机化的流量计提供了一种有效的方法。 This article describes the estimation and estimation of the velocity distribution of unsteady pipe flow using a hot film flow meter. During the measurement, we formulated the signal processing model and applied Kalman technique to the signal processing. The filter is implemented on a personal computer and gets a realistic estimate of the speed profile on the CRT display of the machine in real time. This method of measuring unsteady flow provides an effective method for manufacturing flowmeters with high dynamic precision and computerization.