摘要
针对传统水利输送管道阴极保护工程中管道保护状态人工检测复杂、难度大以及检测数据不准确的问题,基于差分放大器将分压后的管道电位信号进行1-v/v运算转为差分信号并送入模数转换器(ADC),嵌入式处理器通过将ADC周期性采集的数据进行快速傅里叶变换(FFT),提取出其中有效的直流分量值与50 Hz交流值进行存储记录,记录信息中添加GPS信息,通过定期读取设备中的数据并分析当前管道保护的状态,从而采取有效手段进行预保护以避免管道泄漏造成损失与破坏。所设计的电路与选取的嵌入式平台及模组,全部集成在一张印制电路板(PCB)中,并基于freeRTOS实时操作系统进行了电量数据采集、FFT转换与存储、状态监测与报警等软件功能的开发,最终形成了软硬件一体的水利管道阴极保护自动化监测系统的设计。经过在实验腐蚀液中进行对比测试,结果证明了所设计嵌入式检测系统对水利管道的有效监测。
In response to the problems of complex and difficult manual detection of pipeline protection status and inaccurate detection data in traditional protection engineering of water conservancy transmission pipelines,this article proposes a reasonable circuit design,mainly based on a differential amplifier to convert the divided pipeline potential signal into a differential signal through 1-v/v operation and send it to an analog-to-digital converter(ADC).The embedded processor performs Fast Fourier Transform(FFT) on the periodically collected data from the ADC,Extract the effective DC component values and 50 Hz AC values for storage and recording,add GPS information to the recorded information,and staff regularly read data from the equipment and analyze the current pipeline protection status to take effective measures for pre protection to avoid losses and damage caused by pipeline leakage.The circuit designed in this article,along with the selected embedded platforms and modules,are all integrated into a printed circuit board(PCB).Based on the freeRTOS real-time operating system,software functions such as electricity data collection,FFT conversion and storage,status monitoring and alarm are developed,ultimately forming the design of an integrated software and hardware protection automation monitoring system for water conservancy pipelines.After comparative testing in the experimental corrosion solution,the results have proven that the embedded detection system designed in this paper is effective in monitoring water conservancy pipelines.
作者
王海生
杨铁超
WANG Haisheng;YANG Tiechao(Weichang Manchu and Mongol Autonomous County Water Bureau,Hebei,Chengde 068450,China;National Engineering Laboratory of Digital Television,Beijing 100083,China)
出处
《自动化与仪器仪表》
2023年第11期128-131,共4页
Automation & Instrumentation
关键词
水利管道阴极保护
模数转换
快速傅里叶变换
cathodic protection of water conservancy pipelines
analog-to-digital conversion
fast fourier transform
