After frequency selecting when white light walks through the F-P sensor which cavity modulated by temperature, wavelength demodulating is realized with a plane grating and CCD.

采用铜管和端面镀膜的光纤制作f - P传感器，白光光源经过腔长受温度调制的F - P传感器选频后，用平面光栅和线阵CCD实现光波波长的解调。

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Selecting the appropriate circuit model and then analyzing their frequency accuracy, the requirement for the noise suppression and channel linearity.

选择合适的电路形式，再分析它们的频率精度和噪声抑制要求，以及对信道的线性要求。

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The distance between the acoustic-emission source and the receiving transducer, and the background noise level are primary factors in selecting a particular frequency band.

声发射源与接收讯号传感器间的距离以及环境噪声的电平是选择频带的主要依据。

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