| 一种基于机器视觉的水表检定装置的研制 |
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| 引用本文： | 张柯,朱永宏,陆进宇,郝霞莉,周文辉.一种基于机器视觉的水表检定装置的研制[J].机械制造与自动化,2020,49(2):225-228. |
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| 作者姓名： | 张柯 朱永宏 陆进宇 郝霞莉 周文辉 |
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| 作者单位： | 河南省计量科学研究院,河南 郑州450008;河南省医疗器械检验所,河南 郑州450008 |
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| 摘 要： | 研制了一种基于机器视觉的水表检定装置,该检定装置通过设计移动式图像采集平台,单个相机即可完成对多工位的水表指针图像采集,节约了设备成本。采用角度法识别水表指针读数,通过模板匹配校正图像,提出了一种改进的最小二乘法拟合圆心的算法定位指针,利用harris角点检测算法获取针尖点,根据圆心与指针角点形成的连线之间的夹角获得指针的读数。实验表明:该检定装置与人工检定的方法相比,提高了生产效率,且系统的识别正确率在94%以上,具有较高的准确性。
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| 关 键 词： | 计量学 水表检定装置 机器视觉 |
Development of Water Meter Calibration Device with Machine Vision |
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| ZHANG Ke,ZHU Yonghong,LU Jinyu,HAO Xiali,ZHOU Wenhui.Development of Water Meter Calibration Device with Machine Vision[J].Machine Building & Automation,2020,49(2):225-228. |
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| Authors: | ZHANG Ke ZHU Yonghong LU Jinyu HAO Xiali ZHOU Wenhui |
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| Affiliation: | (Henan Institute of Metrology,Zhengzhou 450008,China;Hennan Institute of Medical Apparatus and Instruments Inspection,Zhengzhou 450008,China) |
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| Abstract: | A water meter calibration device with machine vision is developed.The calibration device can be used to complete the image acquisition of water meter pointer at multiple stations by a single camera of mobile image acquisition platform,thus saving the equipment cost.An improved least squares method is proposed,which is used to fit the center of a circle for locating the pointer.Harris corner detection algorithm is used to obtain the pointer point.The pointer reading is obtained according to the angle between the center of the circle and the line formed by the pointer corner.Experimental results show that compared with the manual calibration method,the calibration device is used to improve the production efficiency,and the recognition accuracy of the system is over 94%or higher. |
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| Keywords: | metrology water meter calibration device machine vision |
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