张稳稳, 吴开志, 俞子荣, 杜楠, 邓福建. 基于TCP/IP的远程微小电阻监测仪设计[J]. 南昌航空大学学报(自然科学版), 2017, 31(4): 96-103. DOI: 10.3969/j.issn.1001-4926.2017.04.016
引用本文: 张稳稳, 吴开志, 俞子荣, 杜楠, 邓福建. 基于TCP/IP的远程微小电阻监测仪设计[J]. 南昌航空大学学报(自然科学版), 2017, 31(4): 96-103. DOI: 10.3969/j.issn.1001-4926.2017.04.016
ZHANG Wen-wen, WU Kai-zhi, YU Zi-rong, DU Nan, DENG Fu-jian. Design of the Remote Micro-ohmmeter Based on TCP/IP[J]. Journal of nanchang hangkong university(Natural science edition), 2017, 31(4): 96-103. DOI: 10.3969/j.issn.1001-4926.2017.04.016
Citation: ZHANG Wen-wen, WU Kai-zhi, YU Zi-rong, DU Nan, DENG Fu-jian. Design of the Remote Micro-ohmmeter Based on TCP/IP[J]. Journal of nanchang hangkong university(Natural science edition), 2017, 31(4): 96-103. DOI: 10.3969/j.issn.1001-4926.2017.04.016

基于TCP/IP的远程微小电阻监测仪设计

Design of the Remote Micro-ohmmeter Based on TCP/IP

  • 摘要: 针对野外环境中的金属材料腐蚀状态监测的需要,提出了一种基于TCP/IP的远程微小电阻监测方案。监测仪硬件主要由STM32F4微处理器、交流恒流源、数据采集、网络通信等模块组成,微小电阻的测试原理采用数字互相关算法,将采集到的标准电阻的交流电压值和被测电阻的交流电压值分别与同频率的正弦波参考信号作数字互相关运算后,滤除测量信号中的噪声影响,然后运用欧姆定律求得被测电阻的值,再通过网络将测量出的电阻值上传至上位机进行实时监测。实验结果表明:监测系统可以实现1 μΩ~2 Ω范围内微小电阻的高精度测量,通过远程服务器程序控制可实现定时、远程的自动检测,为远程金属材料腐蚀状态实时监测提供了一种途径。

     

    Abstract: In order to meet the need of monitoring the corrosion status of metal materials in the outdoor environment, a remote micro resistance monitoring scheme based on TCP/IP is proposed. The monitor hardware consists of STM32F4 microprocessor, AC constant current source, data acquisition, network communication module,etc. The principle of micro resistance measurement is using the digital correlation algorithm to eliminate the impact of noise in the signal to be measured, the digital cross correlation are between the data collected from the signal on resistance to be measured or the data collected from the signal on standard resistance and the data from sine wave reference signal with the same frequency respectively, then using Ohm's law to obtain the resistance to be measured. The value of resistance to be measured is uploaded to the PC through the network. The experimental results show that the monitoring system can achieve high-precision measurement of small resistance in the range of 1 μΩ to 2 Ω. The remote PC server program can control the automatic detection performed at the set time, which provides a possible way for remote real-time monitoring of corrosion status of metal materials.

     

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