Feeler device for measuring surface roughness
US4364264A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1980 |
| Grant date | Dec 21, 1982 |
| Priority date | — |
| Expiry date | Dec 31, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B17/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A feeler device for measuring the degree of roughness of an uneven surface being examined, the device comprising a transmitting transducer arranged to convert an electrical signal of a predetermined frequency into an ultrasonic wave propagated through a liquid coupling medium and having a wave length of the same order of magnitude as the uneven surface being examined, a generator being provided to generate and feed the electric signal to the transmitting transducer. A receiving transducer is arranged to receive the ultrasonic wave which is reflected by the surface being examined, the device including a support head for the transmitting transducer and the receiving transducer, the head including a base surface adapted to be rested on the surface being examined, and device also including a processor connected to the transmitting transducer and to the receiving transducer, the processor providing an indication of the phase difference between the ultrasonic signals respectively transmitted and received by the transducers when the base surface of the head rests on the surface being examined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.