&lt;title&gt;Adaptive automatic shape measurement system&lt;/title&gt;

Pirga, Maria; Kujawińska, Małgorzata

doi:10.1117/12.250762

Cited by 4 publications

(2 citation statements)

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“…The system has to be functional in industrial surroundings and has therefore to tolerate vibrations. High demands on measuring speed and accuracy can be fulfilled by an optical measurement approach in the best way [2,3,4]. Among the optical measuring methods, stripe projection seems the most suitable.…”

Section: Need and Requirements Of A New Measurement Techniquementioning

confidence: 99%

Surface inspection system for carriage parts

Denkena

Acker

2006

Photonics in the Automobile II

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Quality standards are very high in carriage manufacturing, due to the fact, that the visual quality impression is highly relevant for the purchase decision for the customer. In carriage parts even very small dents can be visible on the varnished and polished surface by observing reflections. The industrial demands are to detect these form errors on the unvarnished part. In order to meet the requirements, a stripe projection system for automatic recognition of waviness and form errors is introduced 1 . It bases on a modified stripe projection method using a high resolution line scan camera. Particular emphasis is put on achieving a short measuring time and a high resolution in depth, aiming at a reliable automatic recognition of dents and waviness of 10 µm on large curved surfaces of approximately 1 m width. The resulting point cloud needs to be filtered in order to detect dents. Therefore a spatial filtering technique is used. This works well on smoothly curved surfaces, if frequency parameters are well defined. On more complex parts like mudguards the method is restricted by the fact that frequencies near the define dent frequencies occur within the surface as well. To allow analysis of complex parts, the system is currently extended by including 3D CAD models into the process of inspection. For smoothly curved surfaces, the measuring speed of the prototype is mainly limited by the amount of light produced by the stripe projector. For complex surfaces the measuring speed is limited by the time consuming matching process. Currently, the development focuses on the improvement of the measuring speed.

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Section: Need and Requirements Of A New Measurement Techniquementioning

confidence: 99%

Surface inspection system for carriage parts

Denkena

Acker

2006

Photonics in the Automobile II

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“…The high demands on measuring speed and accuracy can be fulfilled by an optical approach in the best way [2,3,4]. Among the optical measuring methods, stripe projection is the most suitable, but the standard measuring systems do not combine speed and accuracy satisfactorily.…”

Section: The Measuring Systemmentioning

confidence: 99%

Surface Inspection System for Large Sheet Metal Parts

Denkena

Berg²,

Acker

2005

AMR

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In this paper a measuring system that allows an automatic detection of waviness and form errors in sheet metal parts is introduced. The system is based on a stripe projection method using a high resolution line scan camera. Particular focus is put on achieving a short measuring time and a high resolution in depth, aiming at a reliable automatic recognition of dents and waviness of 10 µm on large curved surfaces of approximately 1 m width. On smoothly curved surfaces a spatial frequency analysis is used to detect dents. By combining this spatial frequency analysis with a CAD model, more complex parts can be inspected, too. Using an objective 100% inspection of all parts, a quality improvement can be achieved by controlling the forming process.

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