J4 ›› 2012, Vol. 30 ›› Issue (5): 492-.

• 论文 • 上一篇    下一篇

基于EPM240和MSP430的等精度频率计

宗发保1|郭昌华2a|杜伟宁3|王君2a,2b|刁庶2a   

  1. 1.中国船舶重工集团公司 第715研究所|杭州 310012;2.吉林大学 a |仪器科学与电气工程学院;b 地球信息探测仪器教育部重点实验室|长春 130026;3. 空军航空大学 飞行训练基地|长春 130022
  • 出版日期:2012-09-28 发布日期:2012-11-01
  • 作者简介:宗发保(1987—)|男|云南昭通人|吉林大学硕士研究生|主要从事磁测仪器研究|(Tel)86-13578695028(E-mail)zongfabao@163.com;通讯作者:王君(1955—)|男|山东乳山人|吉林大学教授|硕士生导师|主要从事传感器与智能仪器研究,(Tel)86-431-88502071(E-mail)wangjun@jlu.edu.cn。
  • 基金资助:

    国家“863”重大基金资助项目(2006AA06A201);吉林大学种子基金资助项目(450060445673)

Equal Precision Frequency Meter Based on EPM240 and MSP430

ZONG Fa-bao1|GUO Chang-hua2a|DU Wei-ning3|WANG Jun2a,2b|DIAO Shu2a   

  1. 1.715th Research,Institute of China Shipbuiding Industry Corporation,Hangzhou 310012,China;2a.College of Instrumentation and Electrical Engineering;2b.Key Laboratory of Geo-Exploration and Instrumentation of Education Ministry,Jilin University,Changchun 130026,China;3. Basic Flying Training Base,Air Force Aviation University,Changchun 130022,China
  • Online:2012-09-28 Published:2012-11-01

摘要:

为提高信号频率的测量精度,设计了基于EPM240和MSP430的等精度频率计,包括恒温晶振、等精度计数单元和频率计算显示单元。该等精度频率计以CPLD(Complex Programmable Logic Device)芯片EPM240T100C5和单片机MSP430F149为核心,YM1602为液晶显示模块,单片机启动CPLD完成等精度计数后读取计数值进行频率计算并显示。理论计算及实际测试结果表明,该频率计的量程为0.5 Hz~10 MHz,全程测量相对误差小于2×10-8,满足项目中的测频要求。

关键词: 等精度, 频率测量, EPM240芯片, MSP430单片机

Abstract:

In order to improve the accuracy of frequency measurement,an equal precision frequency meter based on EPM240 and MSP430 was designed.It includes constant temperature crystal oscillator,equal precision counting module, frequency calculation and display module.The CPLD(Complex Programmable Logic Device) chip EPM240T100C5 and MCU(Micro Controller Unit) chip MSP430F149 is the core of frequency meter,YM1602 is the display module.The theory calculation and conclusion of experiment shows that the range of frequency meter is 0.5 Hz~10 MHz;relative error is always below 2×10-8;it meets the demand of frequency measurement in the project.

Key words: equal precision, frequency measurement, EPM240 chip, MSP430

中图分类号: 

  • TP368.2