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Underwater target detecting device based on ghost imaging calculation principle

An underwater target and ghost imaging technology, which is applied in the direction of measuring devices, electromagnetic wave re-radiation, and radio wave measurement systems, can solve problems such as poor imaging quality, low resolution, and weak anti-disturbance performance, and achieve high-quality imaging and resolution High-efficiency, accurate rendering of the effect

Inactive Publication Date: 2016-10-12
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low resolution, weak anti-disturbance performance and poor imaging quality of traditional underwater target detection, and propose a device for simulating underwater target detection in a real underwater environment based on the principle of computational ghost imaging

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  • Underwater target detecting device based on ghost imaging calculation principle
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  • Underwater target detecting device based on ghost imaging calculation principle

Examples

Experimental program
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Embodiment 1

[0046] The composition of the computing ghost imaging device according to the present invention is as follows: Figure 4 As shown, including: 1 is a random light source (DMD produced by Texas Instruments), 2 is a beam splitter (Daheng Optical Beam Splitter), and 4 is the object to be imaged (that is, the target object, a double-slit object processed by commission) , 3 is a barrel detector, and the correlator 5 is realized by computer Labview software.

[0047] Target detection method: Under laboratory conditions, a fish tank is used to simulate underwater target detection in the ocean, and a double-slit object is placed in the fish tank. Labview controls DMD to generate 20,000 phase random pictures (pixels are 40×40), that is, random light sources. The random light source passes through the beam splitter and then propagates 80cm underwater to reach the double-slit object, returns to the beam splitter along the original optical path after being reflected by the double-slit obj...

Embodiment 2

[0050] On the basis of Example 1, a surge is produced in an experimental environment, and the experimental environment and parameters are the same as in Example 1.

[0051] Target detection method: On the basis of Example 1, a 24w fish tank wave pump is placed in the fish tank avoiding the propagation path of the light source to simulate underwater target detection under real ocean current dynamics, and the operation method of Example 1 is repeated. The target detection results are as Figure 7 , Figure 8 , the experimental results restore the intensity distribution information of the target object relatively clearly, and can distinguish the double-slit target object more intuitively.

[0052] According to the experimental results, it can be concluded that the present invention is not easily affected by underwater turbulence and has good anti-disturbance characteristics.

Embodiment 3

[0054] With the same experimental conditions as in Example 1, the method of first-order imaging is directly used, that is, an ordinary camera is used to take pictures of the target object, and the experimental light path diagram is as follows Figure 9 As shown in the imaging optical path diagram of an ordinary camera, it includes: 1 is a random light source (DMD produced by Texas Instruments), 2 is a beam splitter (Daheng Optical Beam Splitter), 3 is a barrel detector, 4 is a target object (consigned to process and The double slit object formed), use the fish tank to simulate the underwater environment, utilize the computer Labview software to realize the correlator, and 13 is an ordinary camera. With embodiment 1 experiment environment and condition constant, directly in Figure 9 The double-slit target object is photographed and imaged at the position marked in the imaging light path diagram of the ordinary camera.

[0055] The target detection results show that the first-...

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Abstract

The invention discloses an underwater target detecting device based on a ghost imaging calculation principle. The device comprises a random light source, a beam splitter, a barrel detector and a data processing unit. A random light emitted by the random light source is split by the beam splitter to irradiate an object to be imaged. A signal light reflected by the object to be imaged comes into the barrel detector. The data processing unit transmits the signal of the barrel detector and the random light source to a light intensity distribution value at the same optical path of the barrel detector for second-order correlation calculation to acquire the image of the object to be imaged. The device provided by the invention can resist disturbance, is less susceptible to seawater temperature, salinity change and water flow velocity, and has the advantages of high resolution, high image quality and the like compared with existing various underwater target detection methods.

Description

technical field [0001] The invention belongs to the technical field of underwater target imaging detection, and in particular relates to a device for realizing underwater target imaging detection by using the principle of computational ghost imaging. Background technique [0002] Whether it is in civilian fields such as marine survey, maritime search and rescue, or in military fields such as anti-submarine and anti-missile, underwater reconnaissance, there are extensive and urgent application requirements for underwater target detection technology. According to different imaging principles, underwater imaging technology can be divided into two categories: sonar imaging and optical imaging. At present, sonar imaging technology has become the main means of underwater target detection by virtue of the unique advantages of long propagation distance of sound field in water and low energy loss. However, due to factors such as long wavelength of sound waves and susceptibility to n...

Claims

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Application Information

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IPC IPC(8): G01S17/89
CPCG01S17/89
Inventor 郑淮斌王凡刘建彬周宇陈辉袁园徐卓
Owner XI AN JIAOTONG UNIV
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