Surface Roughness Measurement With Fiber-Optics

1983 ◽  
Vol 105 (4) ◽  
pp. 295-297 ◽  
Author(s):  
W. P. T. North ◽  
A. K. Agarwal
Keyword(s):  
Surface Roughness ◽  
Experimental Investigation ◽  
Fiber Optics ◽  
Fiber Optic ◽  
Incident Light ◽  
Average Surface Roughness ◽  
Object Surface ◽  
Roughness Measurement ◽  
Average Surface ◽  
Surface Roughness Measurement

This paper describes an experimental investigation of a technique for the measurement of surface roughness of “ground” surfaces using fiber-optics. A pair of fiber-optic bundles of similar specifications are used to carry both the incident light to and the reflected from the object surface at different angles of incidence. It has been shown that the ratio of reflected intensities is found to vary inversely as the cube of the average surface roughness.

The Influence of Scratches to Metallic Counterfaces on the Wear of Ultra-High Molecular Weight Polyethylene

1995 ◽  
Vol 209 (4) ◽  
pp. 263-264 ◽  
Author(s):  
J Fisher ◽  
P Firkins ◽  
E A Reeves ◽  
J L Hailey ◽  
G H Isaac
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Average Surface Roughness ◽  
Reciprocating Motion ◽  
Roughness Measurement ◽  
Average Surface ◽  
Surface Roughness Measurement ◽  
Metallic Particles ◽  
Steel Surfaces ◽  
Ultra High Molecular Weight

A number of studies of explanted metallic femoral heads have shown scratches or damage caused by bone cement, bone or metallic particles. This damage has been cited as a cause of increased wear of ultra-high molecular weight polyethylene (UHMWPE) acetabular cups. In this laboratory study, small scratches 2 μm deep were made on smooth stainless steel surfaces at a spacing of 10 mm. These individual scratches were found to increase the wear rate of UHMWPE by a factor of 30 in unidirectional sliding and a factor of 70 in reciprocating motion. It is of particular concern that a single small scratch, which is not detected by the average surface roughness measurement Ra can cause such a dramatic increase in the wear of ultra-high molecular weight polyethylene.

A Reflective Fiber Optic Sensor for Surface Roughness In-Process Measurement

2002 ◽  
Vol 124 (3) ◽  
pp. 515-522 ◽  
Author(s):  
Jiancheng Liu ◽  
Kazuo Yamazaki ◽  
Yi Zhou ◽  
Sadayuki Matsumiya
Keyword(s):  
Surface Roughness ◽  
Light Intensity ◽  
Fiber Optic ◽  
Simulation Method ◽  
Experimental Results ◽  
Fiber Optic Sensor ◽  
Roughness Measurement ◽  
Surface Roughness Measurement ◽  
Optic Sensor ◽  
Sensor Probe

The paper deals with the development of a fiber optic sensor for surface roughness measurement. A new method for the calculation of reflection light intensity is proposed. By numerically counting the amount of reflection light rays from a measured surface, the relationship between the reflection light intensity and the surface roughness can be found. The simulation method is useful in understanding the effects of the sensor probe structure and the component parameters on the performance of the sensor such that an optimum sensor design can be obtained. A fiber optic sensor probe for surface roughness measurement was designed and fabricated using the results obtained by simulation. Experimental results show that the prototype sensor probe has high resolution and sensitivity for ground and milled surfaces with the roughness value (Ra) of 0.1μm∼3.2μm. The experimental results also show that the simulation method is accurate, and hence useful in designing fiber optic sensors. The simulation procedure and feasibility of the simulation method as well as the experimental results obtained from the prototype sensor probe are presented in this paper.

scholarly journals SURFACE ROUGHNESS MEASUREMENT USING SHADOWS PRODUCED BY CIRCULATING LIGHT SOURCES

2009 ◽  
Vol 05 (01) ◽  
pp. 335-352
Author(s):  
TOMOKAZU HIRATSUKA ◽  
KEIICHI HORIO ◽  
TAKESHI YAMAKAWA
Keyword(s):  
Surface Roughness ◽  
Multiresolution Analysis ◽  
Measurement Method ◽  
Light Sources ◽  
Self Organizing Map ◽  
Object Surface ◽  
Roughness Measurement ◽  
Convex Shape ◽  
Surface Roughness Measurement ◽  
Wavelet Multiresolution Analysis

We propose a new measurement method for a degree of roughness of a given object surface. This method is not to measure the degree of roughness of the object surface directly, but to estimate the roughness from surface images. Named as circulating light sources (CLS), its multiple light sources aligned in a circle illuminate sequentially, and produce images including shadow of the object surface. As the shadows on the images reflect a shape of the object surface, the shapes of the surface, concavo-convex shape, can be estimated by these shadows. In this paper, features of surface roughness are extracted by a Wavelet Multiresolution Analysis (MRA) from the shadow images produced by the CLS, and are classified by a Self-Organizing Map (SOM). A roughness of an unknown surface can be estimated by the SOM after learning.

Experimental Investigation of Machining Factors in Metal Turning Operation Using Shainin’s Variables Search Method

2015 ◽  
Vol 798 ◽  
pp. 447-451
Author(s):  
Charnnarong Saikaew ◽  
Theerawat Channongwang ◽  
Teerapol Kumpoo ◽  
Thichathorn Chummuangpug ◽  
Manop Leesai
Keyword(s):  
Surface Roughness ◽  
Experimental Investigation ◽  
Multiple Comparisons ◽  
Search Method ◽  
Average Surface Roughness ◽  
Turning Operation ◽  
Average Surface ◽  
Factors Influencing ◽  
Experiment Method ◽  
Significant Factors

This paper aimed to investigate the machining factors influencing surface roughness and to obtain the appropriate turning operation of aluminum. The Shainin design of experiment method was used to investigate the effect of the four turning factors on surface roughness. Moreover, analysis of variance and multiple comparisons were used to obtain the appropriate turning operation of the significant factors. The results showed that spindle speed was the only significant factor affecting the average surface roughness with the appropriate turning operation of 1000 rpm used for reducing surface roughness of the machined part and tool wear.

Sign in / Sign up

Export Citation Format

Share Document