Apparatus for determining the surface roughness of a material
US5014547A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1989 |
| Grant date | May 14, 1991 |
| Priority date | — |
| Expiry date | Oct 6, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2632
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for determining the surface roughness of a material comprised of an acoustic element which is pivotally mounted to a support structure containing a polished end which is maneuvered into contact with the surface of a material to be tested by a spring element. The material is caused to move relative to the acoustic element by a driven roller. A transducer is acoustically coupled to the acoustic element and detects stress waves propagating in the acoustic element as a result of frictional and impact force generated by the rubbing of the acoustic element with the material. The relative stress wave activity is dependent upon the surface roughness of the material. A processor analyzes an electrical signal produced by the transducer to determine the surface roughness of the material which may analyze the electrical signal produced by the transducer to determine the presence of impurities on the surface of the material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.