FPGA技术下时变光纤光栅传感信号精密细分方法
Precision subdivision method for time-varying fiber Bragg grating sensing signals under FPGA technology
张斌 1蒋志飞 1罗康2
作者信息
- 1. 商丘工学院信息与电子工程学院,河南 商丘 476000
- 2. 华北水利水电大学电气工程学院,郑州 450000
- 折叠
摘要
时变光纤光栅传感信号通常受到噪声、环境干扰等影响,为了提高信号质量,提出一种FPGA技术下时变光纤光栅传感信号精密细分方法.分析光纤光栅位移测量的原理以及莫尔条纹发生的原因,将其作为莫尔信号细分的依据;采用FPGA技术将硬件和软件细分方法结合,设计时变光纤光栅传感信号细分电路,在细分电路的基础上引入时空转换细分方法对信号展开细分处理,以提高信号细分精度.实验结果表明,所提方法在不同细分倍数下其细分误差最大值仅为0.58 mm,在噪声环境下其细分误差最低值仅为 0.19 mm,说明该方法可高精度地完成时变光纤光栅传感信号细分.
Abstract
The time-varying fiber optic grating sensing signal is usually affected by noise,environmental interfer-ence,etc.In order to improve signal quality,a precise subdivision method for time-varying fiber optic grating sensing signal under FPGA technology is proposed.Analyze the principle of fiber optic grating displacement measurement and the causes of moire fringes,and use them as the basis for moire signal subdivision;By combining hardware and soft-ware subdivision methods using FPGA technology,a time-varying fiber Bragg grating sensing signal subdivision circuit is designed.Based on the subdivision circuit,a spatiotemporal conversion subdivision method is introduced to perform signal subdivision processing,in order to improve signal subdivision accuracy.The experimental results show that the proposed method has a maximum subdivision error of only 0.58 mm at different subdivision multiples,and a minimum subdivision error of only 0.19 mm in noisy environments,indicating that the method can achieve high-precision subdi-vision of time-varying fiber optic grating sensing signals.
关键词
FPGA技术/时变光纤光栅传感信号/时空转换细分方法/信号细分Key words
FPGA technology/time-varying fiber optic grating sensing signal/subdivision methods for spatiotem-poral transformation/signal subdivision引用本文复制引用
出版年
2024
NETL
NSTL
万方数据