| 摘要 |
Device and a process for generating a signal dependent upon a liquid film on a surface. The device includes one of a heating arrangement and a cooling arrangement for subjecting a portion of the liquid film to a temperature change, a temperature measuring arrangement for determining the temperature of the liquid film, the temperature measurement arrangement being capable of producing a signal, and a control and evaluation device for controlling one of the heating arrangement and the cooling arrangement and the temperature measuring arrangement. The process includes subjecting a portion of the liquid film to a temperature change using one of a heating and a cooling arrangement, measuring a temperature of the portion using a temperature measuring arrangement, assigning a value which corresponds to a thickness of the liquid film to the temperature change using an evaluation device, and producing a signal.
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