Method for detecting and localizing diffuse reflecting coatings situated on a translucent pane
AssigneeLeopold Kostal GmbH & Co.KG
InventorFrank Blasing
Life of this patent
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Abstract
The invention relates to a method and device for detecting and localizing diffuse-reflecting coatings situated on a translucent pane and to a corresponding device. The aim of the invention is to make it possible to detect any diffuse-reflecting coatings in a non-contacting manner and to differentiate between coatings situated on the surface facing the sensor and those situated on the surface facing away from the sensor. To this end an image of an object is captured by means of a recording unit forming part of the device by positioning the pane in the optical path between the object and recording unit, after which the image information obtained is evaluated accordingly.
Claims9
A method for detecting and localizing coatings on inner and outer surfaces of a translucent pane using a light source and an optical sensor array each positioned adjacent the inner side of the translucent pane, the method comprising:
- transmitting a light beam from the light source to the translucent pane;
- focusing a first light beam part reflected from the inner surface of the translucent pane to form a first image on the optical sensor array;
- focusing a second light beam part reflected from the outer surface of the translucent pane to form a second image on the optical sensor array;
- comparing an intensity profile of the first image to a first reference intensity profile indicative of the absence of coatings on the inner surface of the translucent pane;
- comparing an intensity profile of the second image to a second reference intensity profile indicative of the absence of coatings on the outer surface of the translucent pane;
- generating a first signal indicative of the absence of coatings on the inner and outer surfaces of the translucent pane if the intensity profile of the first image matches the first reference intensity profile and the intensity profile of the second image matches the second reference intensity profile;
- generating a second signal indicative of the absence of coatings on the inner surface of the translucent pane and the presence of coatings on the outer surface of the translucent pane if the intensity profile of the first image matches the first reference intensity profile and the intensity profile of the second image is different than the second reference intensity profile;
- and
- generating a third signal indicative of the presence of coatings on the inner surface of the translucent pane if the intensity profile of the first image is different than the first reference intensity profile.
A device for detecting and localizing coatings on inner and outer surfaces of a translucent pane, the device comprising:
- a light source positioned adjacent the inner surface of the translucent pane, the light source operable for transmitting a light beam to the translucent pane;
- an optical sensor array positioned adjacent the inner side of the translucent pane;
- and
- a receiving unit for focusing a first light beam part reflected from the inner surface of the translucent pane to form a first image on the optical sensor array and for focusing a second light beam part reflected from the outer surface of the translucent pane to form a second image on the optical sensor array;
- wherein the receiving unit compares an intensity profile of the first image to a first reference intensity profile indicative of the absence of coatings on the inner surface of the translucent pane and compares an intensity profile of the second image to a second reference intensity profile indicative of the absence of coatings on the outer surface of the translucent pane;
- wherein the receiving unit generates a first signal indicative of the absence of coatings on the inner and outer surfaces of the translucent pane if the intensity profile of the first image matches the first reference intensity profile and the intensity profile of the second image matches the second reference intensity profile;
- wherein the receiving unit generates a second signal indicative of the absence of coatings on the inner surface of the translucent pane and the presence of coatings on the outer surface of the translucent pane if the intensity profile of the first image matches the first reference intensity profile and the intensity profile of the second image is different than the second reference intensity profile;
- wherein the receiving unit generates a third signal indicative of the presence of coatings on the inner surface of the translucent pane if the intensity profile of the first image is different than the first reference intensity profile.
Dependencies are inferred from the claim text.