基于PLC技术的视频测流方法检验装置及实验  

Test device and experiment of video current measurement method based on PLC technology

作　　者：徐浩 欧阳鑫[1] Xu Hao;Ouyang Xin(Faculty of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,昆明650500

出　　处：《电子测量技术》2021年第13期166-170,共5页Electronic Measurement Technology

基　　金：云南省重点研发计划(2018BA070)项目资助。

摘　　要：为解决在实际水文测量中,无法评判视频测流测量结果的问题,需要一种特定的检验装置检验各种测流方法的准确性。利用可编程逻辑控制器(PLC)设计一种面向开放场景的非接触式流量流速测量结果检验装置,通过该装置进行各种视频测流方法测量结果的检验,从而为视频测量提供一种新的标定方法。首先设计了一种面向开放场景的非接触式流量流速测量结果检验装置;然后,用高帧摄像机拍摄不同帧率的实验视频;最后,用3种主流视频测流算法测量实验视频流速,测量结果与真实数据作对比,结果为3种视频测流算法测量结果误差均在20%以上。实验结果表明,在低流速状态下,如今主流视频测流方法都存在较大误差。In order to solve the problem that it is impossible to evaluate the results of video flow measurement in the actual hydrological measurement, a specific test device is needed to test the accuracy of various flow measurement methods. This paper designs a non-contact flow velocity measurement result inspection device for open scene by using programmable logic controller(PLC). Through this device, the measurement results of various video flow measurement methods are inspected, thus providing a new calibration method for video measurement. Firstly, designs a non-contact flow velocity measurement device for open scenes;secondly, high frame cameras are used to capture experimental videos with different frame rates;finally, three mainstream video flow measurement algorithms are used to measure experimental video flow velocity, and the measurement results are compared with real data, the results show that the error of the three algorithms is more than 20%. The experimental results show that the mainstream video current measurement methods have great errors in low velocity.

关 键 词：视频测流 帧率 检验装置 低流速 PLC 标定方法 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]