基于STM32的简易电路特性测试系统设计  

Design of Simple Circuit Characteristic Test System based on STM32

作　　者：秦绍明 程登良[1] QIN Shaoming;CHENG Dengliang(School of Electrical&Information Engineering,Hubei University of Automotive Technology,Shiyan,HuBei 442002)

机构地区：[1]湖北汽车工业学院电气与信息工程学院,湖北十堰442002

出　　处：《绵阳师范学院学报》2022年第11期20-26,共7页Journal of Mianyang Teachers＇ College

基　　金：湖北省重点实验室开放基金项目(ZDK1201409);湖北汽车工业学院研究生教育质量工程项目(Y202109)。

摘　　要：设计了一种基于STM32单片机控制的简易电路特性测试系统.被测电路测试板是分压式共射极三极管放大电路.测试系统采用外部DDS模块AD9851作为信号源,为被测电路提供0~1 V幅值、1 Hz~180 MHz频率、步长为1 Hz的标准正弦测试信号.该测试信号进行放大或衰减等预处理后得到Vi,输入到给定的被测电路测试板.测试板输出响应信号Vo,使用仪表放大器和OP放大器设计信号采集处理电路进行处理后,利用AD7324对信号进行模数转换.测试系统能实现输入-输出电阻的测量,且误差在1.5%以内,可以实现放大电路幅频特性测量,还具备故障诊断功能,能较好实现电路特性的自动化测试.A simple circuit characteristic test system based on STM32 single chip microcomputer is designed.The test board of the circuit under test is a partial voltage common emitter triode amplifier circuit.The test system uses the external DDS module AD9851 as the signal source to provide the standard sinusoidal test signal with 0~1 V amplitude,1 Hz~180 MHz frequency and 1 Hz step length for the circuit under test.The test signal is preprocessed,such as amplification or attenuation,to obtain Vi,which is input to the given test board of the circuit under test.The test board outputs the response signal Vo.The instrument amplifier and OP amplifier are used to design the signal acquisition and processing circuit for processing,and AD7324 is used to convert the signal into analog to digital.The test system can measure the input-output resistance,and the error is less than 1.5%.It can realize the amplifying circuit amplitude-frequency characteristic measurement,and has the function of fault diagnosis.It can better realize the automatic test of circuit characteristics.

关 键 词：STM32 电路测试系统 放大电路 幅频特性曲线 

分 类 号：TN707[电子电信—电路与系统]