SURFACE ROUGHNESS MEASUREMENTS OF A NARROW BOREHOLE - MEASUREMENT OF SURFACE ROUGHNESS STANDARD PIECE |
|---|
| Eiki Okuyama, Yuichi Suzuki, Masahiro Morikawa, Ichiro Yoshida |
- Abstract:
- In industrial fields, it is frequently necessary to measure surface roughness in confined spaces such as boreholes and grooves. However, using a small stylus, the surface roughness of a narrow borehole can be directly measured only a few millimeters from its end; alternatively, destructive measurements must be performed. We already proposed a novel surface roughness measurement sensor. To make the surface roughness sensor small, we used a stylus with a cylindrical mirror and a lensed fiber instead of a conventional inductive pick-up. The proposed sensor converts the signal obtained by measuring the surface roughness of a borehole into an optical signal, which is transferred outside the borehole by an optical fiber. Experimental results demonstrate that this system has a measurement range of 8 ยต m and a sensitivity of 19 nm. In this paper, a carriage to measure the surface roughness in a small borehole is proposed. The proposed carriage has two degree of freedom, displacement along the borehole axis and rotation around the borehole axis. Furthermore, surface roughness standard pieces were measured by the proposed method and the conventional method. Measurement results obtained by these methods were found to be very similar.
- Keywords:
- surface roughness measurement, borehole, lensed fiber
- Download:
- IMEKO-TC14-2014-38.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC14
- Event name:
- TC14 LMPMI Symposium 2014
- Title:
11th Symposium on Laser Metrology for Precision Measurement and Inspection in Industry
- Place:
- Tsukuba, JAPAN
- Time:
- 03 September 2014 - 05 September 2014