摘要
阐述一种新型光纤光栅振动传感技术,它是利用DWDM的滤波曲线和波分复用技术实现三维振动信号调制,调制信号由示波器高速采集,然后通过GPIB接口连接到计算机(也可以用DAQ-PCMCIA卡替换示波器和GPIB接口),最后用LabView程序对三维振动信号进行解调分析,得出被测物体的三维振动信号频谱。建立了一种用光纤光栅测量长方体花岗岩固有振动频率的模型,并用地震波检测器测量作为参考。发现测量的结果符合较好,并从理论计算中得到了证实。
A novel FBG vibration sensor technology was expatiated, which can realize three-dimensional vibration signal modulated by the filter curve of dense wavelength division multiplex(DWDM) and wavelength division multiplex(WDM) technology. The modulated signal collected by oscilloscope in high speed, then connected to computer by GPIB interface (can also replace the oscilloscope and GPIB interface by DAQ-PCMCIA card), at last we demodulate the three-dimensional vibration signal by LabView program, and we can deduce three-dimensional vibration signal frequency spectrum. The paper established a granite cuboid model, whose inertial frequency can be tested by FBG and the reference Geophone simultaneously. We find that the test results matched very well and were validated by the calculation in theory.
出处
《光学仪器》
2004年第5期21-25,共5页
Optical Instruments
