一种指针式化工仪表的远程抄表设计方法  

Design of Remote Meter Reading Method for Pointer Type Chemical Instruments

作　　者：施健[1] 张冬[1,2] 何建国[1] 康彩[1] 姚军康 马翔[1] 

机构地区：[1]宁夏大学物理电气信息学院,宁夏银川750021 [2]浙江大学生物系统工程与食品科学学院,浙江杭州310058 [3]宁夏大学能源化工重点实验室,宁夏银川750021

出　　处：《自动化仪表》2014年第5期77-79,共3页Process Automation Instrumentation

基　　金：国家自然科学基金资助项目(编号:31101375)

摘　　要：为了实现对传统指针式化工仪表的数字化改造,提出了一种基于嵌入式机器视觉技术及物联网技术的自动读数方案。根据指针式仪表图像的特点,利用角度约束方法对霍夫变换进行了优化;并结合二值图像减影法,识别出指针偏转角度,从而将其转化成实际读数;最后利用无线传输实现远程自动抄表。实测结果表明,采用嵌入式机器视觉及物联网技术实现指针式化工仪表远程抄表具有较高的实用性、正确性及可行性。In order to realize the digital transformation for traditional chemical pointer type instruments, the automatic meter reading strategy based on the technologies of embedded machine vision and the Internet of things is proposed. In accordance with the features of pointer type instruments, by adopting angle constraint method, the Hough transformation is optimized, and combining with binary image subtraction algorithm, the deflection angle of pointer is identified and converted into actual reading, then remote automatic meter reading is implemented by using wireless transmission. The test results verify that using embedded machine vision and Interuet of things technologies to realize remote meter reading for the pointer type chemical instrumentation possesses higher practicability.

关 键 词：嵌入式 STM32F4 机器视觉 指针仪表 自动读数 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]