基于全相位FFT的振弦式传感器频率测量系统设计

针对采用FFT频域法进行频率测量时存在频谱泄漏及栅栏效应,造成测量精度下降的问题,提出一种基于全相位FFT-Rife双谱线校正算法的高精度频率测量方法,并将该算法移植到以STM32处理器为核心的振弦式传感器频率测量系统中。实验结果表明,本系统的频率测量绝对误差小于0.2 Hz,与其他测频方法相比较,具有更高的频率测量精准度。...

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Bibliographic Details
Published in电子技术应用 Vol. 42; no. 7; pp. 53 - 56
Main Author 陈妮 何华光 谢开仲
Format Journal Article
LanguageChinese
Published 广西医科大学基础医学院,广西南宁,530021%广西大学计算机与信息工程学院,广西南宁,530004%广西大学土木工程学院,广西南宁,530004 2016
Subjects
STM32
全相位FFT-Rife校正算法
振弦式传感器
频率测量
频率测量
STM32
vibrating wire sensors
全相位FFT-Rife校正算法
振弦式传感器
full phase FFT-Rife correction algorithm
frequency measurement
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ISSN0258-7998
DOI10.16157/j.issn.0258-7998.2016.07.013

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Summary:针对采用FFT频域法进行频率测量时存在频谱泄漏及栅栏效应,造成测量精度下降的问题,提出一种基于全相位FFT-Rife双谱线校正算法的高精度频率测量方法,并将该算法移植到以STM32处理器为核心的振弦式传感器频率测量系统中。实验结果表明,本系统的频率测量绝对误差小于0.2 Hz,与其他测频方法相比较,具有更高的频率测量精准度。
Bibliography:Chen Ni,He Huaguang,Xie Kaizhong（1. College of Preclinical Medicine, Guangxi Medical University, Nanning 530021, China ; 2.College of Computer and Electronics and Information, Guangxi University, Nanning 530004, China; 3.College of Civil and Architecture Engineering, Guangxi University, Nanning 530004, China）
full phase FFT-Rife correction algorithm;vibrating wire sensors;frequency measurement;STM32
The measurement precision declines because of the existence of spectrum leakage and fence effect,when using FFT method in frequency domain.A high precision frequency measurement method based on all phase FFT-Rife double spectrum line correction algorithm is proposed.And the algorithm is transplanted to the STM32 processor as core of the vibrating wire sensor fre-quency measurement system.Experimental results show that,the absolute error of the system is less than 0.2 Hz,it has a higher frequency measurement accuracy compared with other methods.
11-2305/TN
ISSN:0258-7998
DOI:10.16157/j.issn.0258-7998.2016.07.013