Study on the characteristics of underwater target laser echo based on pulse broadening

Wang, Yujia; Siguang, Zong; Zhang, Xin

doi:10.1117/12.2603111

Cited by 1 publication

(3 citation statements)

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“…As a stable feature, the scale of the target varies little with the environment, but the scale of different targets varies very significantly. Therefore, active acoustic homing torpedoes use the target highlights to estimate the scale of the target and use it as a criterion for target recognition, which has become the primary method for target recognition by active acoustic homing torpedoes (including various active sonars) [3][4][5][6]. Figure 1 shows the attack posture of the torpedo.…”

Section: Introductionmentioning

confidence: 99%

“…Since it is challenging to recognize targets accurately based on the Wang Y et al [9] recognized weak targets by target echo pulse broaden interference background. Moreover, they solved the problem of few echo f difficult recognition of weak targets underwater.…”

Section: Introductionmentioning

confidence: 99%

“…The simulation re the method has higher target recognition accuracy than other feature rec ods. Xu Y et al [11] recognized underwater targets by extracting underwat Since it is challenging to recognize targets accurately based on the echo intensity, Wang Y et al [9] recognized weak targets by target echo pulse broadening in a strong interference background. Moreover, they solved the problem of few echo features and the difficult recognition of weak targets underwater.…”

Section: Introductionmentioning

confidence: 99%

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A Torpedo Target Recognition Method Based on the Correlation between Echo Broadening and Apparent Angle

Wang

et al. 2022

Applied Sciences

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As acoustic decoys can simulate the scale of the target through orderly control of the echo delay, simulated acoustic decoys have scale characteristics similar to those of the scaled target. Consequently, simulated acoustic decoys make it difficult for active acoustic homing torpedoes to recognize acoustic decoys through traditional echo broadening or apparent angle. This will lead to a decrease in the anti-interference capability of torpedoes. In combat, acoustic decoys deceive torpedoes and deviate from the tracking course so that torpedoes cannot find the real target, or waste the range, eventually failing to strike the target and failing in combat. The accurate underwater target scale recognition of active acoustic homing torpedoes is considered a difficult technique. In this paper, we propose a target recognition method based on the correlation between target echo broadening and apparent angle. This specific simulation example shows that conventional target scale recognition methods cannot distinguish between suspended and homing acoustic decoys with virtual scale. By contrast, the target scale recognition method proposed in this paper can accurately distinguish between suspended and homing acoustic decoys with virtual scale at close range, under non-positive transverse port angle conditions. This method improves the anti-interference capability of torpedoes. In addition, it can improve the accuracy of active sonar recognition scale targets of ships, which guide active sonar target recognition.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%