Sensor device for detecting a degree of wetting and/or soiling of a vehicle pane, and a method of producing the sensor device
First Claim
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1. A sensor device for detecting a degree of wetting and/or soiling of a motor-vehicle pane, said sensor comprising:
- a wall being able to be coupled to a surface of said motor-vehicle pane;
an emitter radiation guide element and a receiver radiation guide element extending through said wall;
a radiation emitter and a radiation receiver; and
collecting and directing coupling elements respectively associated with said radiation emitter and said radiation receiver, said collecting and directing coupling elements being respectively coupled to said emitter radiation guide element and said receiver radiation guide element, wherein optical axes of the collecting and directing coupling elements are aligned at acute angles to the motor-vehicle pane, and wherein end faces of the emitter and receiver radiation guide elements facing away from the radiation emitter and receiver are flush with a side of the wall facing the motor-vehicle pane, and wherein the emitter and receiver radiation guide elements are separate from each other and are structured as one piece with the wall, wherein said wall extends between the emitter and receiver radiation guide elements and is formed of a non-transparent material, and wherein each of the emitter and receiver radiation guide elements is held in its respective opening in the wall by fusion of materials.
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Abstract
A sensor device for detecting the degree of wetting and/or soiling of a pane or windshield arranged in a motor vehicle includes individual radiation guide elements integrally molded onto a wall of a housing to be separated from one another by a blocking element of the wall. This reduces the amount of ambient radiation from the environment. A radiation emitter and a radiation receiver are structured as SMD components which are arranged on a circuit board carrier. The sensor device created in this way has a simple and compact design.
13 Citations
9 Claims
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1. A sensor device for detecting a degree of wetting and/or soiling of a motor-vehicle pane, said sensor comprising:
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a wall being able to be coupled to a surface of said motor-vehicle pane;
an emitter radiation guide element and a receiver radiation guide element extending through said wall;
a radiation emitter and a radiation receiver; and
collecting and directing coupling elements respectively associated with said radiation emitter and said radiation receiver, said collecting and directing coupling elements being respectively coupled to said emitter radiation guide element and said receiver radiation guide element, wherein optical axes of the collecting and directing coupling elements are aligned at acute angles to the motor-vehicle pane, and wherein end faces of the emitter and receiver radiation guide elements facing away from the radiation emitter and receiver are flush with a side of the wall facing the motor-vehicle pane, and wherein the emitter and receiver radiation guide elements are separate from each other and are structured as one piece with the wall, wherein said wall extends between the emitter and receiver radiation guide elements and is formed of a non-transparent material, and wherein each of the emitter and receiver radiation guide elements is held in its respective opening in the wall by fusion of materials. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of producing a sensor device for motor vehicles which is to be attached by a transparent coupling medium to a side of a light-transmissive pane of the motor vehicle, wherein at least one radiation guide element, which conducts radiation between one of a radiation emitter and a radiation receiver, is supported in a housing, said method comprising:
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forming an end face of the radiation guide element together with a wall of the housing as one piece of resinous plastic by an at least two stage injection molding operation comprising;
a first stage wherein the radiation guide element is molded of a transparent plastic material and the.wall is molded of a non-transparent plastic material, and a second stage wherein the radiation guide element and the wall are injection molded onto each other. - View Dependent Claims (9)
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Specification