基于单片机的脉冲信号参数测量系统
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摘要
为实现对脉冲信号幅值、频率及占空比等主要参数的便携式精确测量,设计并实现了一种基于STM32F405的高精度脉冲信号参数测量仪。待测信号经阻抗匹配及分压整形处理后,利用STM32F405的高速计数器和定时器功能实现信号频率及占空比测量。而幅值检测则采用运算放大器和开漏输出比较器组成峰值检测电路,从而实现对信号幅值的跟踪检测。最终,利用STM32F405将被测信号的各参数显示于液晶屏上。经调试,测量系统可实现对矩形脉冲信号频率、占空比和幅值参数的有效测量,幅值测量范围为0.1~5 V,测量误差不大于2%;频率测量范围为10 Hz~1 MHz,误差不大于0.1%;占空比测量范围为10%~90%,测量误差不大于2%。
In order to measure the amplitude,frequency and duty cycle of the pulse signal portably and accurately,a parameter measuring system based on STM32 F405 is designed. Firstly,the pulse signal goes through the impedance matching and partial pressure shaping. Then using the counter and timer function of STM32 F405,the frequency and duty cycle can be achieved. Secondly,the amplitude tracking detection part is realized by operational amplifiers and open-drain output comparator. At last,the measured parameters can be displayed in LCD by STM32 F405. Results show that all parameters can be measured accurately. The measuring range of amplitude is 0.1~5 V and error is not greater than 2%;the measuring range of frequency is 10 Hz~1 MHz and error is not greater than 0.1%;the measuring range of duty cycle is 10%~90% and error is not greater than 2%.
In order to measure the amplitude,frequency and duty cycle of the pulse signal portably and accurately,a parameter measuring system based on STM32 F405 is designed. Firstly,the pulse signal goes through the impedance matching and partial pressure shaping. Then using the counter and timer function of STM32 F405,the frequency and duty cycle can be achieved. Secondly,the amplitude tracking detection part is realized by operational amplifiers and open-drain output comparator. At last,the measured parameters can be displayed in LCD by STM32 F405. Results show that all parameters can be measured accurately. The measuring range of amplitude is 0.1~5 V and error is not greater than 2%;the measuring range of frequency is 10 Hz~1 MHz and error is not greater than 0.1%;the measuring range of duty cycle is 10%~90% and error is not greater than 2%.
引文
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[17]董建怀.开漏输出比较器的峰值检测电路设计[J].厦门理工学院学报,2016,1(3):42-46.
[2]杨志华.基于组合脉冲的交通信号节能控制研究[J].微型机与应用,2017(9):64-66.
[3]刘月琴,陈涛,董月.基于脉冲信号注入法的配电变压器绕组变形在线监测研究[J].电力科学与工程,2014,30(4):24-27.
[4]王少博.基于传递矩阵和宽频脉冲声的水声材料声学参数测量方法[J].宇航计测技术,2014(5):58-60.
[5]唐星林,曹永慧,周本智,等.不同光脉冲方案对光下最大荧光参数及其计算参数的影响[J].应用生态学报,2017,28(4):1137-1144.
[6]彭玲玉,王建卫.基于多调频斜率单脉冲信号的多目标参数测量[J].现代雷达,2016(2):47-50.
[7]高新平.敌我识别S模式询问信号实时检测技术[J].无线电工程,2016,46(6):27-29.
[8]王镪,王小静,张锦中,等.低信噪比雷达脉冲检测算法[J].火控雷达技术,2014(4):50-53.
[9]虞昊迪.基于FPGA的脉冲信号参数测量仪设计[J].数字技术与应用,2017(3):173-175.
[10]吴正平,朱寿羽,郭家琪,等.基于FPGA的高精度脉冲信号参数测量仪设计[J].电子技术与软件工程,2016(20):122-123.
[11]张一荻.基于FPGA的脉冲信号参数高精度测量技术研究[J].仪器仪表用户,2017,34(1):32-33.
[12]杜冬,尹学峰,吉小军.基于FPGA的脉冲信号发生/测试仪一体化设计[J].电子测量技术,2015,38(1):64-68.
[13]郝雯,沈金鑫,梅成.基于STM32单片机的存储式数据采集系统设计[J].电子设计工程,2013,21(17):80-82.
[14]孙慧芳,莫淳栋.基于STM32智能家居系统的设计与实现[J].电子设计工程,2014(19):82-85.
[15]刘昕.基于STM32单片机的高精度超声波测距系统的设计[J].电子制作,2013(16):10-10.
[16]毕岗.电磁场与微波[M].杭州:浙江大学出版社,2006.
[17]董建怀.开漏输出比较器的峰值检测电路设计[J].厦门理工学院学报,2016,1(3):42-46.