Enhanced sonar auxiliary distance gating laser underwater imaging device and method

Abstract

The invention relates to an enhanced sonar auxiliary distance gating laser underwater imaging device and method. The device comprises a double-laser enhanced illumination design and a sonar auxiliarytarget distance and azimuth pre-detection system. According to the device and the method, the illumination intensity of a target is improved through an enhanced double-laser illumination system, so that the detection distance of the target can be prolonged; and in addition, the sonar detection system can detect the distance and orientation of the target in advance, the receiving detector window time of a distance gating control circuit is controlled more accurately through an embedded processing module, and the intensity, the orientation and the polarization state of the laser light source arecontrolled, so as to achieve long-distance high-quality imaging detection of the target. According to the method and the device, an inverted triangle structure design is adopted, so that the enhancedsonar auxiliary underwater laser detection effect is further optimized.

Description

technical field [0001] The invention belongs to the field of laser underwater imaging and detection, and relates to an enhanced sonar-assisted range-gated laser underwater imaging device and method. Background technique [0002] As we all know, about 60% of the earth's surface is covered by oceans. In order to develop marine resources, people will inevitably need detailed information about the ocean, so all countries in the world have invested heavily in the research of ocean detection technology. Among the main detection technologies at present, laser underwater imaging technology is a hot technology. Laser underwater imaging is generally divided into two types, one is laser scanning imaging, and the other is range-gated laser imaging; the former is to irradiate the target of interest with continuous laser light, and receive the target image information through the narrow-window high-sensitivity image detector ICCD, The main feature is that the laser is installed separate...

AI Technical Summary

Problems solved by technology

The technical advantage of range gating is mainly to control the opening time of the ICCD receiving window, which is established under the condition that the target distance is known. The time is excellent, so the range gating is generally a rough scan, which cannot effectively control the energy, orientation, and optical state of the laser required to detect the target, and directional delivery, thus limiting its imaging effect and detection distance

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