标准金属量器液位图像识别装置的研制

Development of Standard Metal Tank Liquid Level Measuring Device Using Image Recognition

摘要:

在使用标准金属量器对液体进行计量过程中,传统的人工读取液位的方法测量效率和准确度都比较低;提出了一种高精度的标准量器液位图像识别装置,该装置主要由水平调整和图像处理两部分组成,选用S3C2440 ARM芯片和Linux嵌入式系统作为硬、软件平台;水平调整是通过SCA100T双轴倾角传感器测量标准金属量器的倾角并控制步进电机自动调整,实现闭环控制；对采集的液位图像,由OpenCV进行灰度化、滤波、边缘检测、液位提取,再经过标定计算转换成实际液位高度;实验结果表明该方法能快速测量液位,精度高,应用于燃油加油机计量检定装置上,有较好的推广价值。

Abstract:

In the course of using standard metal tank for liquid metering, the traditional method of measuring the level of human-readable is inefficiency and inaccurate.Putting forward a high-precision standard metal tank level image recognition device which is mainly composed of the level adjustment and image processing,choosing S3C2440 ARM chips and Linux Embedded system as a hardware and software platform. level adjustment is implemented by measuring the inclination of tank by SCA100T axis inclinometer sensor and controlling stepper motor to automatically adjust, realizing closed-loop control; Processing the acquired liquid level image by OpenCV,including graying, filtering, edge detection, liquid extraction, and then after converting into actual level height through calibration. Experimental results show that this method can measure the level with high speed and precision, and it have a better promotional value used in fuel dispensers verification device.