基于视频图像的嵌入式水位监测方法  

Embedded water level monitoring method based on video image

作　　者：张帆[1] 靳晓妍 ZHANG Fan;JIN Xiaoyan(College of Electrical and Information Engineering of Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《中国测试》2022年第12期140-145,共6页China Measurement & Test

摘　　要：针对图像处理检测水位方法中由于环境光线、水渍、杂物等干扰因素造成的测不准问题,提出一种结合移动激光与视频图像处理技术的方法,该方法通过提取并跟踪移动激光的光斑,识别出激光在背板与水面之间的移动轨迹,从而判断出图像中水位位置,并根据几何关系计算实际水位高度。对水电站真实水位视频进行检测实验,并与基于模板匹配的图像处理检测水位法进行对比,结果表明该方法的检测误差小于2.00 cm,证明该方法对光线强度不敏感,能有效排除污染和水体波动等干扰因素,从而充分证实该方法的有效性。The method of water level measurement based on image processing technology usually encounter the problem of low accuracy caused by the light from the outside environmental and debris floating on the water. A method combining movable laser technology and video image processing technology is proposed to solve this problem. By recognizing and tracking the moving laser spot, this method can obtain the trajectory of the moving laser between the backplane and the water surface. In this way, the position of the water level in the image can be caught, and the actual height of the water level can be calculated according to the geometric relationship. This method has been used to measure the water level in hydropower station, and the results are compared with the water level measurement method based on template matching algorithm. The results of comparison show that the measurement error of water level in this method is less than 2.00 cm. It indicates that this method is not sensitive to light intensity and can effectively eliminate the interference factors such as floating debris and water fluctuation. Thus, the effectiveness of this method is fully verified.

关 键 词：移动激光 视频 图像识别 水位检测 目标跟踪 

分 类 号：TB9[一般工业技术—计量学] TP216[机械工程—测试计量技术及仪器]