Laser apparatus for measuring dirt density on steel plates
US6546784B2 · kind B2 · utility
3Cited by
3References
4Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 20, 2001 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Jul 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K15/046
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is an apparatus that measures dirt density on steel plates, characterized by including a pulsed laser that impinges on the inspected plate, and a microphone that detects the sound produced by the sudden ablation of the dirt, the amplitude of the microphone signal being the measure of the dirt on the plate. The microphone is connected to an electronic signal processing system, which is a computer or a programmed digital processor that determines the average value and standard deviation of the signal over the number of hits specified by the operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.