Water drop detection system and method for optical mirror surface and water drop erasing system

A detection system, optical mirror technology, applied in the direction of polarization influence characteristics, etc., can solve the problems of reducing image resolution and recognition effect, reducing resolution and so on

Active Publication Date: 2021-10-22
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For small adherent water droplets, the gray value of the imaging pixel is the average effect of a large field of view, which will undoubtedly reduce the resolution and produce large grayscale changes on both sides of the edge of the raindrop; for larger adherent water droplets, it will appear like In the case of a medium image, the resolution and recognition effect of the image will also be reduced

Method used

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  • Water drop detection system and method for optical mirror surface and water drop erasing system
  • Water drop detection system and method for optical mirror surface and water drop erasing system
  • Water drop detection system and method for optical mirror surface and water drop erasing system

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Embodiment 1

[0052] Please refer to figure 1 , is a schematic diagram of the structural connection of the water drop wiping system in an embodiment of the present application, including the water drop wiping system 1 and the optical lens 2 . The water drop wiping system 1 includes a water drop wiping device 20 and a water drop detection system 10 . The water drop detection system 10 is used to send an erasing command to the water drop erasing device 20 when detecting water droplets on the surface of the optical lens. The water drop erasing device 20 is used for erasing the water droplets on the surface of the optical lens in response to the erasing instruction. The water drop detection system 10 is used to detect water drops attached to the surface of the optical lens. The water drop detection system 10 includes a polarized light acquisition device 13 , an image acquisition device 11 and a control processor 12 . The polarized light obtaining device 13 is used for polarizing and refractin...

Embodiment 2

[0063] Please refer to Figure 4 , is a schematic flow chart of a water drop detection method in an embodiment, the water drop detection method is used to detect water droplets attached to the surface of an optical lens, including:

[0064] Step 100, acquiring polarized light.

[0065] The reflected light on the surface of the optical lens is sequentially polarized and refracted according to a preset polarization angle sequence, so as to obtain polarized light of at least one polarization angle.

[0066] Since most of the equipment for erasing water droplets adhered to the lens are manually started and graded, and some equipment for erasing water droplets adhered to the lens that can be automatically controlled does not directly measure the amount and degree of influence of water droplets adhered to the lens. Instead, it is controlled by other easily obtained information such as rainfall, which may cause the lens to adhere to water droplets. Of course, there are also direct i...

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PUM

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Abstract

The invention discloses a water drop detection system for an optical mirror surface, which is used for detecting water drops attached to the surface of the optical mirror surface and comprises a polarized light acquisition device, an image acquisition device and a control processor. The polarized light acquisition device is used for polarizing and refracting reflected light on the surface of the optical lens to acquire polarized light. The image acquisition device is used for acquiring polarized light images. The control processor is used for detecting water drops on the surface of the optical lens according to the polarized light image. The water drop detection is carried out through the polarized light imaging of the reflected light on the surface of the optical lens, so that the influence of the reflection background can be filtered to a certain extent, and the recognition accuracy of the adhered water drop and the robustness to the environment are improved.

Description

technical field [0001] The invention relates to the technical field of optical instruments and equipment, in particular to a water drop detection system and method for optical mirrors and a water drop erasing system. Background technique [0002] Equipment equipped with optical windows, such as car windows, doors and windows, optical instruments, picture and video acquisition equipment, etc., will often face the problem of water droplets attached to the optical windows. For example, video acquisition equipment is prone to raindrops or Splash and fall on the optical window to form adhered raindrops; ordinary cars often encounter water droplets splashed on the road and raindrops when it rains and fall on the windshield to form adhered water droplets; some field optical equipment may also be on the road Adhesion or condensation of water droplets on the lens during the process and the cycle of day and night. As a necessary channel for optical collection, the optical window is m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/21
CPCG01N21/21
Inventor 禹智斌赵明光
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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