Advanced CAQ

Comparing Manufactured Products With Underlying CAD Models

Dirk Schaefer, Dieter Roller, Kai Wolf

Research output: Contribution to conferencePaper

Abstract

The quality of manufactured products usually needs to be verified. This paper presents an advanced CAQ approach to compare manufactured objects with reference data from underlying CAD models. First, we give an overview about the current state of the art of optical 3D measurement techniques. Then we discuss the methods developed to implement our prototypic system in which we used a stripe projection system with combined grey-code and phase shifting processing. With this equipment, 3D data of object surfaces can be measured. In order to compare the 3D data (represented in some sensor co-ordinate system) we need a registration to the CAD co-ordinate system. First the selection of a starting point for the orientation parameters is described. For the registration process we use different numerical algorithms to minimise a distance function. To achieve a better performance, we introduce an optimisation process based on 3D voxel arrays. After the registration process several parameters for the kind of geometric displacement can be calculated and visualised. For objects that cannot be measured from one direction we also implemented a pair wise registration as well as a global registration. Furthermore, we present some rapid prototyping examples our CAQ approach has been applied to and outline some application fields.
Original languageEnglish
Pages273-280
Publication statusPublished - 1999
EventProceedings of the 15th Conference on Computer-Aided Production Engineering : CAPE´99 - Durham, UK United Kingdom
Duration: 19 Apr 199921 Apr 1999

Conference

ConferenceProceedings of the 15th Conference on Computer-Aided Production Engineering : CAPE´99
CountryUK United Kingdom
CityDurham
Period19/04/9921/04/99

Fingerprint

Computer aided design
Sensors
Processing

Keywords

  • Computer-aided quality control
  • Computer-aided manufactuing
  • Rapid prototyping
  • coded light approach
  • 3D measurement

Cite this

Schaefer, D., Roller, D., & Wolf, K. (1999). Advanced CAQ: Comparing Manufactured Products With Underlying CAD Models. 273-280. Paper presented at Proceedings of the 15th Conference on Computer-Aided Production Engineering : CAPE´99, Durham, UK United Kingdom.

Advanced CAQ : Comparing Manufactured Products With Underlying CAD Models. / Schaefer, Dirk; Roller, Dieter; Wolf, Kai.

1999. 273-280 Paper presented at Proceedings of the 15th Conference on Computer-Aided Production Engineering : CAPE´99, Durham, UK United Kingdom.

Research output: Contribution to conferencePaper

Schaefer, D, Roller, D & Wolf, K 1999, 'Advanced CAQ: Comparing Manufactured Products With Underlying CAD Models' Paper presented at Proceedings of the 15th Conference on Computer-Aided Production Engineering : CAPE´99, Durham, UK United Kingdom, 19/04/99 - 21/04/99, pp. 273-280.
Schaefer D, Roller D, Wolf K. Advanced CAQ: Comparing Manufactured Products With Underlying CAD Models. 1999. Paper presented at Proceedings of the 15th Conference on Computer-Aided Production Engineering : CAPE´99, Durham, UK United Kingdom.
Schaefer, Dirk ; Roller, Dieter ; Wolf, Kai. / Advanced CAQ : Comparing Manufactured Products With Underlying CAD Models. Paper presented at Proceedings of the 15th Conference on Computer-Aided Production Engineering : CAPE´99, Durham, UK United Kingdom.
@conference{3ed5c41e72c448d2892b6ab7c9eed354,
title = "Advanced CAQ: Comparing Manufactured Products With Underlying CAD Models",
abstract = "The quality of manufactured products usually needs to be verified. This paper presents an advanced CAQ approach to compare manufactured objects with reference data from underlying CAD models. First, we give an overview about the current state of the art of optical 3D measurement techniques. Then we discuss the methods developed to implement our prototypic system in which we used a stripe projection system with combined grey-code and phase shifting processing. With this equipment, 3D data of object surfaces can be measured. In order to compare the 3D data (represented in some sensor co-ordinate system) we need a registration to the CAD co-ordinate system. First the selection of a starting point for the orientation parameters is described. For the registration process we use different numerical algorithms to minimise a distance function. To achieve a better performance, we introduce an optimisation process based on 3D voxel arrays. After the registration process several parameters for the kind of geometric displacement can be calculated and visualised. For objects that cannot be measured from one direction we also implemented a pair wise registration as well as a global registration. Furthermore, we present some rapid prototyping examples our CAQ approach has been applied to and outline some application fields.",
keywords = "Computer-aided quality control, Computer-aided manufactuing, Rapid prototyping, coded light approach, 3D measurement",
author = "Dirk Schaefer and Dieter Roller and Kai Wolf",
year = "1999",
language = "English",
pages = "273--280",
note = "Proceedings of the 15th Conference on Computer-Aided Production Engineering : CAPE´99 ; Conference date: 19-04-1999 Through 21-04-1999",

}

TY - CONF

T1 - Advanced CAQ

T2 - Comparing Manufactured Products With Underlying CAD Models

AU - Schaefer, Dirk

AU - Roller, Dieter

AU - Wolf, Kai

PY - 1999

Y1 - 1999

N2 - The quality of manufactured products usually needs to be verified. This paper presents an advanced CAQ approach to compare manufactured objects with reference data from underlying CAD models. First, we give an overview about the current state of the art of optical 3D measurement techniques. Then we discuss the methods developed to implement our prototypic system in which we used a stripe projection system with combined grey-code and phase shifting processing. With this equipment, 3D data of object surfaces can be measured. In order to compare the 3D data (represented in some sensor co-ordinate system) we need a registration to the CAD co-ordinate system. First the selection of a starting point for the orientation parameters is described. For the registration process we use different numerical algorithms to minimise a distance function. To achieve a better performance, we introduce an optimisation process based on 3D voxel arrays. After the registration process several parameters for the kind of geometric displacement can be calculated and visualised. For objects that cannot be measured from one direction we also implemented a pair wise registration as well as a global registration. Furthermore, we present some rapid prototyping examples our CAQ approach has been applied to and outline some application fields.

AB - The quality of manufactured products usually needs to be verified. This paper presents an advanced CAQ approach to compare manufactured objects with reference data from underlying CAD models. First, we give an overview about the current state of the art of optical 3D measurement techniques. Then we discuss the methods developed to implement our prototypic system in which we used a stripe projection system with combined grey-code and phase shifting processing. With this equipment, 3D data of object surfaces can be measured. In order to compare the 3D data (represented in some sensor co-ordinate system) we need a registration to the CAD co-ordinate system. First the selection of a starting point for the orientation parameters is described. For the registration process we use different numerical algorithms to minimise a distance function. To achieve a better performance, we introduce an optimisation process based on 3D voxel arrays. After the registration process several parameters for the kind of geometric displacement can be calculated and visualised. For objects that cannot be measured from one direction we also implemented a pair wise registration as well as a global registration. Furthermore, we present some rapid prototyping examples our CAQ approach has been applied to and outline some application fields.

KW - Computer-aided quality control

KW - Computer-aided manufactuing

KW - Rapid prototyping

KW - coded light approach

KW - 3D measurement

M3 - Paper

SP - 273

EP - 280

ER -