基于STM32和LabVIEW的双频激电信号采集系统设计

Design of dual-frequency IP signal acquisition system based on STM32 and LabVIEW

本文将LabVIEW与基于32位ARM单片机的数据采集电路结合,研究实现了一种高精度、多功能的双频激电信号采集系统.激电信号被采集系统接收后,经信号调理进入模数转换电路转换为数字信号,由USB接口送入基于LabVIEW软件平台的上位机中.上位机对该信号进行滤波选频、幅值测量、频谱分析、幅频率计算等处理,得到目标参数,同时还具有绘图、保存、查看等功能.本文就双频激电信号采集进行了阻容网络模拟实验,先用公式计算出理论视幅频率值,然后搭建电路进行实测.实验结果表明,该采集系统对双频激电信号采集的视幅频率测量误差小、精度高,具有良好的测量效果.

This article combines LabVIEW with data acquisition circuit based on 32-bit ARM microcontroller to develop a highprecision and multi-function dual-frequency induced polarization signal acquisition system.After being received and conditioned by acquisition system,the IP signal is converted into a digital signal by analog-to-digital conversion circuit,then the data is sent to the upper computer based on the LabVIEW platform by the USB interface.The upper computer performs filtering,frequency selection,amplitude measuring,spectrum analysis,percent frequency effect calculation and other processing on the signal to obtain target parameters,and also has functions of waveform display,data saving and viewing.This article took dual-frequency IP signal acquisition as an example,conducted RC network simulation experiment.First used the formula to calculate the theoretical percent frequency effect,then built the circuit for actual measurement.Experimental results showed that the system has small error and high precision for the percent frequency effect measurement of the dual-frequency IP signal acquisition,the measurement effect is satisfactory.