基于OneNET的幅频曲线测量装置设计与实现  

Design and implementation of OneNET-based amplitude and frequency curve measurement device

作　　者：过泽栋 吴江[1] GUO Zedong;WU Jiang(School of Information Science and Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学信息科学与工程学院,杭州310018

出　　处：《智能计算机与应用》2024年第9期93-98,共6页Intelligent Computer and Applications

摘　　要：本文设计并制作了一个幅频曲线测量装置,用来测量放大器电路的频率特性,并能将数据存储在OneNET云平台。该测试装置硬件系统由信号源DDS电路、AGC放大器电路、中频放大器电路、幅值检测电路、WIFI模块以及主控为STM32单片机组成。工作原理是由信号源模块产生扫频信号,经过AGC放大器使得扫频信号稳定在500 mVpp,通过中频放大器电路后,由幅值检测模块测量输出信号的幅值,计算中频放大器电路的增益,将频率和幅值数据上传到OneNET云平台,绘制幅频特性曲线。In this paper,an amplitude and frequency curve measurement device is designed and fabricated to measure the frequency characteristics of an amplifier circuit and to be able to store the data in the OneNET cloud platform.The hardware system of the test device consists of a signal source DDS circuit,an AGC amplifier circuit,an IF amplifier circuit,an amplitude detection circuit,a WIFI module and a STM32 microcontroller as the main control.The working principle is that the signal source module generates the swept signal,which is stabilized at 500mVpp by the AGC amplifier.After passing through the IF amplifier circuit,the amplitude detection module measures the amplitude of the output signal,calculates the gain of the IF amplifier circuit,uploads the frequency and amplitude data to the OneNET cloud platform,and draws the amplitude and frequency characteristic curve.

关 键 词：频率特性 中频放大器 幅值检测 无线通信 

分 类 号：TN710[电子电信—电路与系统] TN721TN741