| Whole Machine and System Design |
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| Design of weak magnetic signal acquisition system for metal pipeline based on STM32 |
| ZHENG Hua-lin, FENG Yi-fu, PAN Sheng-hu |
| School of Mechatronics Engineering， Southwest Petroleum University， Chengdu 610500， China |
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Abstract Aiming at the cumbersome data processing problems of existing metal pipeline weak magnetic signal acquisition methods, based on the weak magnetic signal detection technology, a weak magnetic signal acquisition system integrating data acquisition, data processing and data analysis was built by using HMC1001, HMC1002 magnetoresistive sensors and the STM32F407 chip. Firstly, the acquisition and transmission process of the weak magnetic signal was introduced; then, the hardware of the weak magnetic signal acquisition system was designed, and the filtering algorithm and the compression algorithm were introduced to write the corresponding data processing and analysis program. Through the designed hardware circuit and data processing and analysis program, the functions of acquisition, transmission, filtering, compression, storage and real-time display of the weak magnetic signal of the metal pipeline were realized. The field verification results meet the expectation of the designed weak magnetic signal acquisition system, which show that the system has practical value.
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Received: 09 December 2020
Published: 28 October 2021
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基于STM32的金属管道弱磁信号采集系统设计
针对现有金属管道弱磁信号采集方法的数据处理烦琐问题，基于弱磁信号检测技术，利用HMC1001、HMC1002磁阻传感器和STM32F407芯片，搭建了一套集数据采集、数据处理和数据分析于一体的弱磁信号采集系统。首先，介绍了弱磁信号的采集和传输过程；然后，对弱磁信号采集系统的硬件进行了设计，并引入滤波算法和压缩算法，编写了相应的数据处理与分析程序。通过设计的硬件电路和数据处理与分析程序，实现了金属管道弱磁信号的采集、传输、滤波、压缩、存储和实时显示等功能。现场验证结果符合所设计的弱磁信号采集系统的预期，表明该系统具有实用价值。
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