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水位仪自动判读监视系统的设计和实现
黄玉兰 顾海军 李玲
(吉林大学 通信工程学院 吉林 长春 130012)
摘要:为解决工业生产中对锅炉内部水位的远程监测,本文设计了一种水位仪自动判读监视系统,并实现
了此系统核心部件,即嵌入式视频处理平台.基于提出的多空间的、多小波变换的水位仪判读算法进行了
仿真测试,该方法应用于判读系统提高了水位仪实时监视效果并实现了自动判读.实验结果表明该系统能
在复杂监视背景下有效识别水位仪红绿色条分界点,使确定水位位置及计算水位高度准确、高效.它保证
了锅炉的安全生产,为锅炉水位的自动控制提供了可能.
关键词:水位仪;图像;自动判读;小波;
中图分类号:TP391 文献标识码: A
System Designed to Realize the Supervision and Interpretation
Automatic on the Water Level Meter
Huang Yu-lan Gu Hai-jun Li ling
( College of Communication Engineering, Jilin University, Changchun, Jilin, 130012, China)
Abstract: During the industrial production, in order to acquire the water level inside the boiler distantly, the paper
proposed a scheme to realize the supervision and interpretation system for the water level. It also provides how to
design the system core part, an embedded video signal processing platform. Based on the given multi -wavelet
algorithm on multi-spaces, the processing results are given in details. The algorithm is applied in the embedded
platform and gets good performance, it can interpret the water level automatically. The system proposed in this
paper can distinguish the boundary between red stripe and green stripe effectively under complicated background,
and make it more accurate in determining the water level and more effective in calculating the water height. It is
proved that the effect of this system is good and makes the automatic water controlling for the boiler possible.
Keywords: water level meter; image; automatic interpretation; wavelet;
1.引言
在工业生产中为保证生产安全,必须及时掌握锅炉的内部水位数据.但是由于锅炉不透明,无法直接
观测到其内部水位,在实际应用中,通常将水位仪和锅炉连成一个闭合的回路,根据连通器的原理,水位
仪的液面高度就是锅炉内部的水位高度.管式双色水位仪利用水和蒸汽具有不同的折射率,光在水中和蒸
汽中发生全反射的临界角不同的原理,能产生汽红水绿,无水全红,满水全绿的颜色特征,所以从水位仪
红绿分界点的位置就可以判断锅炉内部的水位高度,从而保障锅炉的安全生产.
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由于锅炉温度高,观测人员不便于近距离观测,同时观测角度也受到很大限制,在实际应用中通常在
水位仪前面放置一台摄像机,摄取的水位仪视频信息再传输给设置在远端监视室内的监视器,从而实现对

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