公开(公告)号：EP0894249A1

公开(公告)日：1999-02-03

申请号：EP97915010.0

申请日：1997-03-13

Applicant: McDONNELL DOUGLAS CORPORATION ,  UNIVERSITY OF FLORIDA

Inventor： SCHANZE, Kirk ,  MORRIS, Martin

IPC: G01L1 ,  G01L11

CPC classification number: G01L11/02 ,  G01L1/24

Abstract: A system (50) for determining strain includes: a stimulating light source (54, 56); a device (64) for placing stress on an object (58); a number of local strain gauges (66) attached to the object (58); and an image capturing device (62, 64). A controller (52) is coupled to the stimulating light source (54, 56) and has a signal that turns on the stimulating light source (54, 56). The controller (52) receives a strain signal from each of the local strain gauges (66) located on the object (58). The controller (66) has an image signal that determines when the image capturing device (62, 64) captures an image.

公开(公告)号：EP0990130A1

公开(公告)日：2000-04-05

申请号：EP97917803.5

申请日：1997-04-01

Applicant: McDONNELL DOUGLAS CORPORATION

Inventor： BENNE, Michael ,  DONOVAN, John ,  KELBLE, Christopher ,  KIHLKEN, Thomas ,  MORRIS, Martin ,  PAL, Alexander

IPC: G01N7/00 ,  G01M9/06 ,  G01L11/02

CPC classification number: G01M9/06 ,  G01L11/02

Abstract: A method of determining pressure requires that a three-dimensional surface of an object (14) be covered with a pressure sensitive coating. Next a raw first image (74) is acquired while the object (14) is not under test and a raw second image (74) is acquired while the object is under test. The raw first image (74) and the raw second image (74) are adjusted for a dark image (76) to form an adjusted first image and an adjusted second image. The adjusted first image and the adjusted second image are mapped (78) from a two-dimensional representation onto a three-dimensional model, to form a first model and a second model. A ratio model is formed (80) by taking the ratio of the intensity of the first model and the second model. Finally, a pressure is determined (84) for every surface that forms the three-dimensional model.

公开(公告)号：EP0990130B1

公开(公告)日：2005-10-26

申请号：EP97917803.5

申请日：1997-04-01

Applicant: McDONNELL DOUGLAS CORPORATION

Inventor： BENNE, Michael ,  DONOVAN, John ,  KELBLE, Christopher ,  KIHLKEN, Thomas ,  MORRIS, Martin ,  PAL, Alexander

IPC: G01N7/00 ,  G01M9/06 ,  G01L11/02

CPC classification number: G01M9/06 ,  G01L11/02

Abstract: A method of determining pressure requires that a three-dimensional surface of an object (14) be covered with a pressure sensitive coating. Next a raw first image (74) is acquired while the object (14) is not under test and a raw second image (74) is acquired while the object is under test. The raw first image (74) and the raw second image (74) are adjusted for a dark image (76) to form an adjusted first image and an adjusted second image. The adjusted first image and the adjusted second image are mapped (78) from a two-dimensional representation onto a three-dimensional model, to form a first model and a second model. A ratio model is formed (80) by taking the ratio of the intensity of the first model and the second model. Finally, a pressure is determined (84) for every surface that forms the three-dimensional model.

公开(公告)号：EP0894249B1

公开(公告)日：2010-04-21

申请号：EP97915010.9

申请日：1997-03-13

Applicant: McDONNELL DOUGLAS CORPORATION ,  University of Florida

Inventor： SCHANZE, Kirk ,  MORRIS, Martin

IPC: G01L1/24 ,  G01M9/06

CPC classification number: G01L11/02 ,  G01L1/24