作者：王丹丹, 倪江生, 刘涛

作者单位：东南大学仪器科学与工程学院, 江苏南京 210096

关键词：FBG解调; VC++软件; MATLAB软件; 混合编程; 数据处理

摘要：

阐述了基于DSP的光纤布拉格光栅(Fiber Bragg Grating,FBG)波长解调系统原理。系统使用单片DSP进行信号采集,通过USB2.0高速串行口将采集的数据传送给上位机,由上位机软件对FBG波长进行解调。FBG波长的解调包括数字滤波、波长峰值计算和在线拟合标定,提出了VC++和MATLAB混合编程的方式实现巴特沃斯数字滤波和波长的拟合标定,并由质心法获得波长峰值。通过测试实验获得了准确的检测结果。

Software design of FBG demodulation system based on VC++

WANG Dan-dan, NI Jiang-sheng, LIU Tao

School of Instrument Science & Engineering, Southeast University, NanJing 210096, China

Abstract: A principle of Fiber Bragg Grating wavelength demodulation system based on DSP was elaborated.This system could acquire signal by using a single chip of DSP and transfer collected data to the host PC through USB2.0 interface in high speed mode.The FBG wavelength demodulation was realized by host PC software including digital filter, peak wavelength calculation and on-line fitting of calibration curve.A method of mixed programming using VC++ and MATLAB was presented to complete Butterworth digital filter and the fitting of calibration curve of wavelength.Meanwhile, the centroid method was used to get the peak wavelength.The experiment indicates that the software functions are effective.

Keywords: FBG demodulation; VC++; MATLAB; Mixed programming; Data process

2009, 35(6): 42-45  收稿日期: 2009-3-28;收到修改稿日期: 2009-6-9

基金项目: 

作者简介: 王丹丹(1984-),男,山东滕州市人,硕士研究生,研究方向为智能检测技术。

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