油气管道阴极保护数据远程采集系统的设计

摘要

The buried metal pipeline has serious corrosion problems.However,the methods for evaluating cathodic protection in China are mostly manual inspection,which results in large errors in measurement data,incomplete data and inconvenient viewing.In this paper,a remote data acquisition system is proposed to evaluate cathodic protection of metal pipe.A high-precision acquisition circuit is designed,and the cathodic protection parameters of the buried oil pipeline are collected and sent back to the data server through the remote transmission mode of GPRS/CDMA.The current protection status of the protected pipeline can be obtained via analyzing and processing the data in the server,which provides an important basis for the protection of the pipeline.Moreover,a dedicated power management module has been designed and an ultra-low power processor MSP430F5438 is selected as the main control chip in this module,so that the system current is less than 20 pA in sleep mode.The system can work continuously for more than 10 years via a cooperative power supply between the 12 000 mAh battery and solar cell,which makes up for the lack of power supply in the field.%针对埋地金属管道腐蚀严重,而我国阴极保护的评测方法多为人工巡检,测量数据误差大、数据不完备、查看不便的现状,设计出一套金属管道阴极保护数据远程采集系统.设计了高精度的采集电路,通过GPRS/CDMA的远程传输方式,将埋地油气管道的各项阴极保护参数采集后发回服务器.通过服务器查看数据并对各项数据进行综合分析与处理,获得受保护管道的当前保护状况,为管道的保护提供了重要依据.设计专门的电源管理模块,选取超低功耗处理器MSP430F5438使系统在休眠模式下电流小于20μA,采用12 000 mAh的电池配合太阳能电池可工作10年以上,弥补了野外供电不足的缺陷.