Method and system for comparing free-form geometries using high density point data models
US5442572A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1994 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | Jun 2, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is provided for verifying the accuracy of a part geometry with respect to a master geometry. The method begins with the step of providing a computer workstation including a computer and an output device attached to the computer. The method also includes the steps of generating a master HDPDM describing the geometry of the master and generating a part HDPDM describing the geometry of the part. The master HDPDM includes a plurality of points. The method further includes the step of aligning the master HDPDM and the part HDPDM within a coordinate frame. The method continues with the step of computing the distance from each point of the master HDPDM to the surface described by the part HDPDM to obtain signed distance data. The method concludes with the step of displaying an image on the output device based on the signed distance data. The image represents the non-conformance between the master and the part and is used to verify the accuracy of the geometry of the part with respect to the geometry of the master.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.