Method and device for detecting soiling
First Claim
1. A device for detecting soiling, having a light source, which emits a light beam, an opaque layer having a first boundary surface and a second boundary surface, wherebythe light beam emitted by the light source first impinges on the first boundary surface,part of a fraction, which is scattered at the second boundary surface, of the light beam impinges on a receiver and forms a measuring signal,characterized in thatthe first boundary surface is set up to scatter part of the incident light beam, andthe part impinging on the receiver of the light beam, scattered at the first boundary surface forms a reference signal, and the device is set up to determine a measure for the soiling of the second boundary surface from the comparison of the reference signal and the measuring signal.
1 Assignment
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Accused Products
Abstract
A device for detecting soiling, having a light source, which emits a light beam, and an opaque layer having a first boundary surface and a second boundary surface, whereby the light beam emitted by the light source first impinges on the first boundary surface, and part of a light beam fraction, which is scattered at the second boundary surface, impinges on a receiver and forms a measuring signal, and hereby the first boundary surface is set up to scatter part of the incident light beam, and the part impinging on the receiver of the light beam, scattered at the first boundary surface, forms a reference signal, and the device is set up further to determine a measure for the soiling of the second boundary surface from the comparison of the reference signal and measuring signal.
10 Citations
15 Claims
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1. A device for detecting soiling, having a light source, which emits a light beam, an opaque layer having a first boundary surface and a second boundary surface, whereby
the light beam emitted by the light source first impinges on the first boundary surface, part of a fraction, which is scattered at the second boundary surface, of the light beam impinges on a receiver and forms a measuring signal, characterized in that the first boundary surface is set up to scatter part of the incident light beam, and the part impinging on the receiver of the light beam, scattered at the first boundary surface forms a reference signal, and the device is set up to determine a measure for the soiling of the second boundary surface from the comparison of the reference signal and the measuring signal.
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10. A method for detecting soiling on an opaque layer, which has a first boundary surface and a second boundary surface, with a light source, which emits a light beam, and the light beam is directed first to the first boundary surface, and part of the light scattered at the second boundary surface is directed to a receiver and a measuring signal is produced,
wherein the first boundary surface is set up in such a way that part of the incident light beam is scattered, and part of the light scattered at the first boundary surface is directed to the receiver and a reference signal is produced, and a measure for the soiling of the second boundary surface is formed from the comparison of the reference signal and the measuring signal.
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15. Use of the device or method for detecting soiling on surfaces of solar collectors and/or solar cells and/or glass panes.
Specification