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CN-122009086-A - Spraying control method of wiper system and vehicle

CN122009086ACN 122009086 ACN122009086 ACN 122009086ACN-122009086-A

Abstract

The disclosure relates to a spray control method of a windshield wiper system and a vehicle, which acquire water drop contact angle information and water film form information of a cleaning area of the windshield wiper system of a windshield through image recognition, realize objective and quantitative perception of a hydrophobic state of the surface of the windshield, and solve the problems of low cleaning efficiency or waste of cleaning liquid caused by fixed spraying due to lack of objective and quantitative perception. And secondly, the comprehensive hydrophobicity index is obtained by fusing the contact angle information of the water drops and the water film form information, so that the accuracy and the robustness of the evaluation under different environmental working conditions are improved. Finally, spraying is dynamically controlled based on the hydrophobicity index, and accurate on-demand control is realized, so that the contradiction between low cleaning efficiency and waste of cleaning liquid is fundamentally and synchronously solved, and the unification of improving the cleaning efficiency and avoiding the waste of resources is realized.

Inventors

  • ZHANG CHAO

Assignees

  • 长城汽车股份有限公司

Dates

Publication Date
20260512
Application Date
20260206

Claims (10)

  1. 1. A spray control method of a wiper system, comprising: identifying an image of a cleaning area of a wiper system of a windshield to obtain contact state information between liquid of the cleaning area of the wiper system and the windshield; determining a hydrophobicity index of the cleaning region of the wiper system based on the contact state information; And controlling the spraying action of the wiper system based on the hydrophobicity index.
  2. 2. The method of claim 1, wherein the identifying the image of the wiper system cleaning area of the windshield to obtain the contact state information between the liquid of the wiper system cleaning area and the windshield comprises: Determining a first image of a cleaning area of the wiper system between spraying and brushing by the wiper system; identifying the first image to obtain water drop contact angle information; determining a second image of a cleaning area of the wiper system after the wiper system sprays and wipes; identifying the second image to obtain water film form information; the contact state information includes the water drop contact angle information and the water film morphology information.
  3. 3. The method of claim 2, wherein the identifying the first image to obtain the water drop contact angle information comprises: Identifying water drops in the first image to obtain contour lines of the water drops; fitting the contour line of the water drop with a preset curve to obtain the water drop contact angle information of the water drop.
  4. 4. A method according to claim 3, wherein said identifying water droplets in said first image resulting in contours of said water droplets comprises: converting the first image into a binary image; carrying out connected domain analysis on the binary image to obtain a connected region contour line serving as the contour line of the water drop; fitting the contour line of the water drop with a preset curve to obtain the water drop contact angle information of the water drop, wherein the fitting comprises the following steps: and performing nonlinear least square fitting on the contour line of the water drop and the preset curve, and solving to obtain the water drop contact angle information of the water drop.
  5. 5. The method of claim 2, wherein the identifying the second image to obtain water film morphology information includes: Identifying a water film area in the second image, and obtaining water film coverage rate based on the area of the water film area and the area of the cleaning area of the wiper system; Determining an average dropping rate of the plurality of water film coverage rates along with time change as the water film cracking speed based on the plurality of water film coverage rates corresponding to the plurality of image frames which are arranged in time sequence in the second image; The water film morphology information includes the water film coverage rate and the water film rupture speed.
  6. 6. The method of claim 5, wherein the identifying the water film region in the second image, based on the area of the water film region and the area of the wiper system cleaning region, results in a water film coverage comprising: performing differential operation on the second image and a preset dry windshield image to obtain a differential image; converting the differential image into a binary image; Noise elimination is carried out on the binary image, and adjacent areas of the binary image after noise elimination are connected to obtain the water film area; And calculating the ratio between the area of the water film area and the area of the cleaning area of the wiper system to obtain the water film coverage rate.
  7. 7. The method of claim 2, wherein the determining a hydrophobicity index of the wiper system cleaning area based on the contact state information comprises: mapping the water drop contact angle information into a first standardized score, and mapping the water film form information into a second standardized score; Determining a first confidence of the water drop contact angle information, and determining a first weight of the first normalized score based on the first confidence; determining a second confidence level of the water film morphology information, and determining a second weight of the second normalized score based on the second confidence level; and carrying out weighted calculation based on the first standardized score, the first weight, the second standardized score and the second weight to obtain the hydrophobicity index.
  8. 8. The method of claim 1, wherein controlling the spray action of the wiper system based on the hydrophobicity index comprises: Determining target spraying parameters based on the mapping relation between the hydrophobicity index and a plurality of preset spraying control gears; and generating a spraying control signal based on the target spraying parameter, and controlling the spraying amount and/or the spraying time of the wiper system based on the spraying control signal.
  9. 9. The method of claim 1, wherein after determining the hydrophobicity index of the cleaning region of the wiper system based on the contact state information, the method further comprises: adding the hydrophobicity index to a hydrophobicity index sequence; And carrying out trend analysis on the hydrophobicity index sequence, and generating maintenance prompt information in response to determining that the hydrophobicity index in the hydrophobicity index sequence is in a continuous descending trend.
  10. 10. A vehicle comprising a memory, a processor and a computer program stored on the memory, the processor executing the computer program to perform the steps of the method of any one of claims 1 to 9.

Description

Spraying control method of wiper system and vehicle Technical Field The disclosure relates to the field of wiper systems, and in particular relates to a spray control method of a wiper system and a vehicle. Background This section is intended to provide a background or context to the embodiments of the disclosure recited in the claims. The description herein is not admitted to be prior art by inclusion in this section. The windshield wiper system is integrated with a water spraying device for spraying glass cleaning fluid (commonly called glass water), and the water spraying device sprays the glass cleaning fluid in cooperation with the wiping action of the windshield wiper so as to realize the cleaning of the windshield. In the related art, for spray control of a wiper system, a fixed pattern scheme, that is, a spray amount and a spray time, is generally adopted, and is generally fixed. However, since the spray amount and the spray time are fixed, there is a problem that the cleaning efficiency is low when the cleaning degree of the windshield is low, and there is a problem that the glass cleaning liquid is wasted when the cleaning degree of the windshield is high. Disclosure of Invention In order to overcome or at least partially solve the above problems, the present disclosure provides a spray control method of a wiper system and a vehicle. A first aspect of an embodiment of the present disclosure provides a spray control method of a wiper system, including: identifying an image of a cleaning area of a wiper system of a windshield to obtain contact state information between liquid of the cleaning area of the wiper system and the windshield; determining a hydrophobicity index of the cleaning region of the wiper system based on the contact state information; And controlling the spraying action of the wiper system based on the hydrophobicity index. Based on the same inventive concept, a second aspect of the embodiments of the present disclosure provides a vehicle comprising a memory, a processor and a computer program stored on the memory, the processor executing the computer program to implement the steps of the method according to the first aspect. The technical scheme provided by the embodiment of the disclosure has the following advantages: The method has the advantages that the water drop contact angle information and the water film form information of the cleaning area of the windshield wiper system are obtained through image recognition, objective and quantitative perception of the surface hydrophobic state of the windshield is achieved, and the problems of low cleaning efficiency or waste of cleaning liquid caused by fixed spraying due to lack of objective and quantitative perception are solved. And secondly, the comprehensive hydrophobicity index is obtained by fusing the contact angle information of the water drops and the water film form information, so that the accuracy and the robustness of the evaluation under different environmental working conditions are improved. Finally, spraying is dynamically controlled based on the hydrophobicity index, and accurate on-demand control is realized, so that the contradiction between low cleaning efficiency and waste of cleaning liquid is fundamentally and synchronously solved, and the unification of improving the cleaning efficiency and avoiding the waste of resources is realized. Drawings The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings may be obtained from these drawings without inventive effort. Fig. 1 is a schematic view of an application scenario of a spray control method of a wiper system according to an exemplary embodiment of the present disclosure; fig. 2 is a schematic flow chart of a spray control method of a wiper system according to an exemplary embodiment of the present disclosure; Fig. 3 is a schematic structural view of a spray control device of a wiper system according to an exemplary embodiment of the present disclosure; FIG. 4 is a schematic diagram of an electronic device provided in an exemplary embodiment of the present disclosure; Fig. 5 is a schematic structural view of a vehicle provided in an exemplary embodiment of the present disclosure. Detailed Description It will be appreciated that prior to using the technical solutions disclosed in the embodiments of the present disclosure, the user should be informed and authorized of the type, the usage range, the usage scenario, etc. of the image information of the cleaning area of th