基于树莓派的井下水仓水位智能测控系统  

Intelligent measurement and control system of mine water level based on Raspberry Pi

作　　者：陈海舰 王唯一 范锦鸽 潘逸冬 闫子骥[3] 吴保磊[3] CHEN Haijian;WANG Weiyi;FAN Jinge;PAN Yidong;YAN Ziji;WU Baolei(CCTEG Changzhou Research Institute,Changzhou 213015,China;Tiandi(Changzhou)Automation Co.,Ltd.,Changzhou 213015,China;School of Computer Science and Technology,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中煤科工集团常州研究院有限公司,江苏常州213015 [2]天地(常州)自动化股份有限公司,江苏常州213015 [3]中国矿业大学计算机科学与技术学院,江苏徐州221116

出　　处：《工矿自动化》2023年第8期127-133,共7页Journal Of Mine Automation

基　　金：中国矿业大学实验室开放项目(2020SYKF06)。

摘　　要：针对目前井下水仓水位监测方法精度较低、易受环境影响、实时性不强、对机器算力的要求较高、硬件成本较高等问题,提出了一种基于树莓派的井下水仓水位智能测控系统。该系统通过防爆监控摄像机采集水仓标尺周围水位图像,采用树莓派作为图像处理平台。首先,将采集的彩色图像转换为灰度图像,利用Otsu法对图像进行阈值分割,通过形态学运算去除噪声并增强图像边缘信息,进而将标尺轮廓从背景中分离出来;其次,利用Canny算子检测标尺边缘,并利用Hough变换方法提取水位线与标尺竖边的交线,得到水位线在图像空间中的坐标;然后,对水位线附近区域一定范围内的标尺数字图像进行阈值分割和滤波增强处理,再通过模板匹配法实现标尺数字识别,从而得到水位线数值;最后,将水仓水位线数值转换为电流模拟量,利用树莓派发送给水泵控制器,根据电流大小控制水泵开停,实现水仓水位智能控制。该系统具有成本较低、部署便捷、精度高、实时性好等优点,能够实现水仓水位快速精准识别与控制。The current water level monitoring methods have the problems of low precision,susceptibility to environmental impact,weak real-time performance,high requirements for machine computing power,and high hardware costs.In order to solve the above problems,a Raspberry Pi-based intelligent water level measurement and control system for underground water storage is proposed.The system collects water level images around the water tank scale through explosion-proof monitoring cameras,and uses raspberry pie as the image processing platform.Firstly,the method converts the collected color images into grayscale images,and uses the Otsu method to perform threshold segmentation on the images.The method removes noise and enhances image edge information through morphological operations,and then separates the ruler contour from the background.Secondly,the Canny operator is used to detect the edge of the scale,and the Hough transform method is used to extract the intersection line between the water level line and the vertical edge of the scale,obtaining the coordinates of the water level line in the image space.Thirdly,threshold segmentation and filtering enhancement processing are performed on the digital image of the scale within a certain range of the area near the water level line.Then,the template matching method is used to achieve the recognition of the scale number,thereby obtaining the water level line value.Finally,the method converts the numerical value of the water level line in the water tank into a current analog quantity,and uses Raspberry Pi to send the water pump controller to control the start and stop of the water pump based on the current magnitude.The method achieves intelligent control of the mine water level.This system has the advantages of low cost,convenient deployment,high precision,and good realtime performance.It can achieve rapid and accurate recognition and control of mine water level.

关 键 词：井下水仓 水位测控 树莓派 边缘检测 HOUGH变换 数字识别 

分 类 号：TD745[矿业工程—矿井通风与安全]