Surface roughness measuring instrument
US4665739A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1985 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Jun 27, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A surface roughness measuring instrument wherein an analogue output signal from a displacement detector (32) for electrically detecting a turning displacement of a measuring arm (5) is converted into a digital signal, and this output signal is interpreted to thereby provide measure of surface roughness of a work (18) to be measured. This surface roughness measuring instrument divides a length to be measured, which is set by a setter (42) by a number of samplings N, i.e. 2.sup.n, which are arranged equidistantly, and includes a timing circuit (40) for sampling-controlling an analogue/digital converter (39) at the times of samplings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.