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本文介绍了具有自适应极值搜索功能的数字极性相关测试系统。在配备相应的传感器后,可用以测量平均流速、流量及距离、深度等。文中分别讨论了脉冲乘法器、数字积分器、双通道数字可调延时电路和自适应逐次比较极值搜索系统的设计,并详细分析了测试系统的性能,指出该系统的测量精度可达1％。文中最后还列出了实验所得的数据和照片,为该系统的实际使用提供了一定的实验依据。
This article describes a digital polar correlation test system with adaptive extreme search. Equipped with the appropriate sensor, can be used to measure the average flow rate, flow and distance, depth and so on. The paper discusses the design of pulse multiplier, digital integrator, two-channel digitally adjustable delay circuit and adaptive successive comparison extremum search system, and analyzes the performance of the test system in detail. The measurement accuracy of the system is up to 1 %. Finally, the article also lists the experimental data and photos obtained for the actual use of the system provides a certain experimental basis.