摘要
以89S52单片机和EP1C6Q240C8型FPGA为控制核心的多功能计数器,是由峰值检波、A/D转换、程控放大、比较整形、移相网络部分组成,可实现测量正弦信号的频率、周期和相位差的功能。多功能计数器采用等精度的测量方法,可实现频率为1 Hz～10 MHz、幅度为0.01～5 Vrms的正弦信号的精确测频,以及频率为10 Hz～100 kHz、幅度为0.5～5 Vrms的正弦信号精确测相。液晶显示器能够实时显示当前信号的频率、周期和相位差。该多功能计数器精度高,界面友好,实用性强。
A multi-function counter,which uses 89S52 MCU and EP1C6Q240C8 FPGA as a control core,consists of peak detector, A/D conversion, program-controlled amplification, compared shaping and phase-shifting network part. The counter measures the frequency,period and phase of sinusoidal signal.With the equal precision method, the multi-function counter achieves the precise frequency measurement of the sinusoidal signal which its frequency is from 1Hz to 10MHz,its amplitude is from O.O1Vrms to 5Vrms,as well as the accurate phase measurement of the sinusoidal signal which its frequency is from 10Hz to 100kHz,its amplitude is from 0.5Vrms to 5Vrms.The LCD monitor real-time displays the frequency,period and phase difference of current signal.The multi-function counter features high precision,friendly interface, and strong practical.
出处
《电子设计工程》
2009年第7期40-41,共2页
Electronic Design Engineering
关键词
FPGA
等精度测频
测相
多功能计数器
FPGA
equal precision frequency measurement
phase measurement
multi-function counter
