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Accurate target material identification system

A technology for identifying systems and targets, which is applied in the field of accurate target material identification systems, and can solve the problems of inability to accurately identify the specific material of the target and low light intensity.

Pending Publication Date: 2019-01-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the target is far away, the intensity of light may be as low as the single photon level, and the specific material of the target cannot be accurately identified.

Method used

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] The inventor has studied the scattering process of photons and atoms, analyzed the factors affecting the polarization direction of outgoing photons, and proved that the type of substance has an impact on the polarization direction of outgoing photons. Based on this, the present invention provides a method that utilizes polarization information A method of detecting the type of substance.

[0027] See attached figure 1 , the embodiment of the present in...

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Abstract

The invention discloses an accurate target material identification system. The accurate target material identification system comprises a polarized light emitting system and a polarized light detecting system. The polarized light emitting system comprises a pulse laser, an optical splitter, an emitting system and a PIN detector connected with the optical splitter, wherein the pulse laser, the optical splitter and the emitting system are sequentially arranged. The polarized light detection system comprises a receiving system, a four-way Stokes photon polarization detection system, a photon counting data acquisition system and a data processing system which are sequentially connected, wherein the PIN detector is connected with the photon counting data acquisition system, and the Stokes vector of reflected photons is calculated by using the photon count distribution measured by Gm-APD, and the purpose of target material identification is achieved through the change of the Stokes vector.

Description

technical field [0001] The invention relates to the technical field of laser radar detection, and more specifically relates to an accurate target material identification system. Background technique [0002] With the continuous development of science and technology, there are higher and higher requirements for the distance and accuracy of target detection. At present, the material recognition of long-distance targets is also a research hotspot. The polarization characteristics of target reflection echoes can effectively distinguish between artificial targets and natural targets, and improve the ability of lidar to identify camouflaged targets. However, when the target is far away, the intensity of light may be as low as the single photon level, and the specific material of the target cannot be accurately identified. [0003] Therefore, how to provide a detection system for accurately identifying the target material is an urgent problem to be solved by those skilled in the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/88
CPCG01S17/88
Inventor 张子静靳辰飞宋杰赵远
Owner HARBIN INST OF TECH
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