Method and device for generating a signal according to a liquid film on a surface
US6511220B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2000 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Apr 11, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2210/13
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.