Research On Ship Target Compound Detection Technology In Shallow Sea

This article mainly studies the shallow sea ship target detection technology.As far as its shallow sea ship target detection process is concerned,it aims to reduce the detection error caused by interference waves.Based on the wave characteristics of ship seismic waves,wavelet construction was performed.The Butterworth wavelet is used to filter the acoustic and seismic wave forms of the same ship vibration signal,and the filtered acoustic and seismic wave form signals are combined to obtain the time delay information of the same signal transmitted in two different ways.Therefore,the target distance of the ship in shallow water is measured,and the reliability of the detection accuracy is improved.The theory and propagation characteristics of sound wave and seismic wave are described,and based on the wavelet transform and multi-resolution,the wavelet structure is constructed for the ship seismic wave and the infinite impulse response filter bank(IIR).Using the constructed Butterworth wavelet and the high-usage Daubechies series of same-order wavelets in signal processing,filtering and analyzing the same ship vibration signal to be processed.It can be obtained that Butterworth wavelet has higher accuracy in extracting ship vibration signals and can be compared in shallow water in strong highfrequency interference,the filtering of low-frequency or very low-frequency ship vibration signals is more accurately realized.The use of Butterworth wavelet to filter ship vibration signals in the form of acoustic and seismic waves,and to perform crosscorrelation calculations on the extracted detection signals,not only reducing the problems caused by the attenuation of seismic wave propagation,but also suppressing interference waves from generating delays effect of error.Based on the strong representative Rake Wavelet in the seismic wavelet mathematical model,the acoustic and seismic wave signals are simulated by adding different Signal-to-Noise Ratios,and the compound simulation analysis is performed using Butterworth wavelet.The feasibility of using Butterworth wavelet with the characteristics of ship seismic wave waveforms to realize composite detection technology was confirmed.Selecting experimental sites consistent with the overall shallow ocean environment,and collecting experimental data by simulating ships,sonar and vibration sensors.Based on Butterworth wavelet,the experimental data are used for compound detection and verification.The verification results show that compared with the detection method realized by using solely the seismic waves on the sea floor,the combination of the acoustic wave and seismic wave forms of the same ship vibration signal can improve the reliability of the target detection accuracy of shallow sea ships by 12%,which is more accurate distance measurement of ship targets.