Detection of raindrops on a pane by means of a camera and lighting
US-9335264-B2 · May 10, 2016 · US
Sensor device for detecting moisture on a pane
US9709493B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9709493-B2 |
| Application number | US-201414157128-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 16, 2014 |
| Priority date | Jan 17, 2013 |
| Publication date | Jul 18, 2017 |
| Grant date | Jul 18, 2017 |
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- Title
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Abstract
Official abstract text for this publication.
In a sensor device for detecting moisture on a pane comprising at least one transmitter which emits light which is reflected at the pane and received by at least one receiver, an optical system is provided between the transmitter and the receiver, which brings about a multiple reflection between the pane and the optical system. A particularly good measurement is thereby made possible.
First claim
Opening claim text (preview).
The invention claimed is: 1. A sensor device for detecting moisture on a pane comprising at least one transmitter which emits light which is reflected at the pane and received by at least one receiver, wherein an annular optical system is provided between the only one transmitter and the only one receiver, which brings about a multiple reflection between the pane and the optical system, wherein the sensor device has a frame which can be fastened to the pane, wherein the frame has an annular shape, wherein each side of the annular optical system is parallel with a corresponding side of the annular frame, and wherein the annular optical system is disposed on the inner periphery side of the annular frame, facing a center of the annular frame. 2. The sensor device according to claim 1 , wherein the optical system has a mirror which is disposed parallel to the pane. 3. The sensor device according to claim 1 , wherein the one transmitter and the one receiver are configured as diodes. 4. The sensor device according to claim 1 , wherein the optical system is designed such that the multiple reflection takes place at angles between 40° and 50°. 5. The sensor device according to claim 1 , wherein the optical system is configured in such a manner that the angle of reflection at the pane is smaller than the angle of reflection in the optical system. 6. A motor vehicle having a windscreen and the sensor device according to claim 1 disposed on the windscreen. 7. The sensor device according to claim 1 , wherein the frame of the sensor device is used for holding a component. 8. The sensor device according to claim 7 , wherein the component is a camera. 9. The sensor device according to claim 5 , wherein the optical system has a mirror which is disposed parallel to the pane, and the angle of reflection at the pane is smaller than the angle of reflection at the mirror. 10. The sensor device according to claim 1 , wherein the entire frame is annularly disposed on a surface of the pane. 11. The sensor device according to claim 1 , wherein the optical system extends in parallel with the entire frame.
Assignees
Inventors
Classifications
with a particular arrangement of the optical elements · CPC title
- G01N21/55Primary
Specular reflectivity · CPC title
Optical rain sensor · CPC title
- G01N21/552Primary
Attenuated total reflection · CPC title
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Frequently asked questions
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- What does patent US9709493B2 cover?
- In a sensor device for detecting moisture on a pane comprising at least one transmitter which emits light which is reflected at the pane and received by at least one receiver, an optical system is provided between the transmitter and the receiver, which brings about a multiple reflection between the pane and the optical system. A particularly good measurement is thereby made possible.
- Who is the assignee on this patent?
- Hella Kgaa Hueck & Co
- What technology area does this patent fall under?
- Primary CPC classification G01N21/55. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jul 18 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).