On-line non-contact measuring of synchronizer hubs

Fraga, César G.; Enguita, J.M.; Álvarez, Ignacio; Marina, Jorge; Martínez, Néstor Campos

doi:10.1117/12.612258

Cited by 5 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4,10,17,18 Fig. 3 shows an example of the results of such an instrument, in this case with a standoff of 135 mm and a small angle of triangulation (over 15 • ) to provide a wider depth of field.…”

Section: Profilometer Working Principlementioning

confidence: 97%

See 1 more Smart Citation

Fringe pattern characterization by OPD analysis in a lateral shearing interferometric profilometer

et al. 2011

View full text Add to dashboard Cite

A common-path interferometric profilometer using a Savart plate as a lateral shearer has been successfully tested under harsh environmental conditions to measure the shape of a surface, detecting defects and characterizing surface properties. The whole profile is obtained from a single image and its depth sensitivity is easily scalable, making this technique suitable for many different applications. Although this system has been successfully used for surface inspection and defect detection, some behaviors cannot be explained by the usual simple model for fringe formation, which, amongst other things, considers normal incidence of the incoming rays into the Savart plate. These deviations from the ideal case are more noticeable for high resolutions from short distances. This paper studies the formation of the fringe pattern, which is crucial for understanding the behavior of the system and proper calibration.

show abstract

Section: Profilometer Working Principlementioning

confidence: 97%

“…1 A good example of such a system is Conoscopic Holography, 2, 3 which has been successfully used for this purpose. [4][5][6][7][8] Haüsler et al 9 also proposed a similar system using a Savart plate as lateral shearer.…”

Section: Introductionmentioning

confidence: 97%

Fringe pattern characterization by OPD analysis in a lateral shearing interferometric profilometer

et al. 2011

View full text Add to dashboard Cite

show abstract

“…This technology is normally used in co-linear configuration between the monochromatic light source (laser) and the detection branch (conoscopic module + linescan CCD), as seen in figure 3, using the frequency of the interferometric signal as the feature for the measurements. Many industrial applications are using this configuration [3,4], that permits a number of advantages over competing technologies:…”

Section: Conoscopic Holography Long Stand-off Profilometermentioning

confidence: 99%

Industrial online surface defects detection in continuous casting hot slabs

Álvarez

Marina²,

Enguita

et al. 2009

SPIE Proceedings

Self Cite

View full text Add to dashboard Cite

Early surface defects inspection in hot steel products is a difficult task, but can help to reduce significantly production costs. This is the case of steel slabs when they are produced in the continuous casting line. Conoscopic holography phase-based long stand-off profilometers have shown to be a great tool for this kind of inspection, and a breakthrough system based on them is being used for more than 2 years in production conditions with high reliability and economical impact. This paper presents the results of this system and the challenges it has overcome: hot material up to 900ºC, dust, scale over the inspected surface, …

show abstract

“…Conoscopic holography (CH) 1 works well for this purpose. 2,3 Unlike normal machine-vision systems that provide only 2D images of a part, CH provides depth information. This common-path interferometric technique is based in the double refraction property of uniaxial crystals, and offers high-precision measurements with a wide range of standoff distances.…”

mentioning

confidence: 99%