Özet:

In the process of measuring the radiated noise of underwater structure, using optical fiber hydrophone array is the main means of information acquisition. Due to the complexity of the measurement environment, when the wavelength of the light source and the array deformation in the optical fiber measurement system are changed, the power fluctuation of the input light and the demodulation failure of the system will be caused, which will affect the measurement effect of the radiated noise. For this reason, an adaptive control system for the optical source and the demodulator is designed, which can ensure the stability of the laser source and the digital demodulation system. The experimental data show that the adaptive control system designed in this paper can realize signal stable modulation and signal synchronous processing, which provides a more suitable scheme for accurate measurement of underwater equipment radiated noise.

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