摘要
该系统由单片机89S52控制模块,程控宽带放大模块,整形模块,FPGA内频率、相位差测量模块等构成,采用等精度测频法测出频率和周期,可测量有效值为0.01～5 V,频率范围1 Hz～20 MHz信号的频率、周期信号,精度高达10-6。采用计数法测量相位差,该系统可测量有效值0.5～5 V,频率10 Hz～100 kHz信号的相位差,精度为1°。系统功能由按键控制,测量结果实时显示,人机界面友好。
The system consists of the following functional blocks：89S52 microcontroller controlling module,programmable amplifier module,comparator module, frequency and phase difference testing module in the FPGA.The system use the equal accuracy frequency-examining technique it measures frequency and circle of signal which its ranges is from 1Hz to 20 MHz and the amplitude of which its range is from 0.01Vrms to 5Vrms,precision is up to 10^-6.Using of count method, the system detects the phase difference of signal,the amplitude of whic its range is from 0.5 Vrms to 5 Vrms and the frequency of which its ranges is from 10 Hz tol00 kHz,precision is up to 1° ,The system ＇functions is controlled by certain keys, measurement results are displayed in real-time and it is friendly interface.
出处
《电子设计工程》
2009年第5期18-19,23,共3页
Electronic Design Engineering
关键词
测频
测相
等精度测频法
程控放大
frequency measurement
phase measurment
equal precision frequency-measurment method
programmable amplifier
