Robert O Dewar, Age 4839200 Parkwood Ave, Sterling Heights, MI 48313

4841460, Jun 20, 1989

Sep 8, 1987

7/094329

Robert Dewar - Troy MI
Dale R. Greer - Novi MI

Perceptron, Inc. - Farmington Hills MI

G06G 748
H04N 718

36457102

One or more non-contacting gauging sensors are calibrated to a common external coordinate system by providing each sensor to be calibrated with a target which can be simultaneously viewed by the sensor and an external measuring system for determining coordinates of the target in terms of the external coordinate system and in terms of the sensor coordinate system. With the resulting spatial coordinates of the target expressed in both frames of reference, transform matrix coefficients can be calculated, for example with a programmable computer, to calibrate each sensor to the preselected common external coordinate system.

4399554, Aug 16, 1983

Aug 21, 1980

6/180131

Walton A. Perkins - Troy MI
Lothar Rossol - Rochester MI
Robert Dewar - Troy MI
James K. West - Auburn Heights MI

General Motors Corporation - Detroit MI

G06K 900

382 8

A computer vision system for inspecting engine heads during assembly for missing valve spring assembly keys comprises a solid-state camera for taking pictures of the valve spring assemblies and providing picture data upon command to a computer. The computer responds to a position encoder which relates the position of the engine head to the camera. Once the data is stored in the computer, it is analyzed to determine the center of the digitized image of the valve spring assembly and an intensity profile at the expected location of the keys relative to the center of the assembly is utilized to determine whether a key is missing.

4105925, Aug 8, 1978

Mar 14, 1977

5/777011

Lothar Rossol - Sterling Heights MI
Joseph T. Olsztyn - Madison Heights MI
Robert Dewar - Warren MI
Steven W. Holland - Utica MI

General Motors Corporation - Detroit MI

G01N 2130

250561

In order to determine the position and orientation of an object on a conveyor, two planes of light intersect at a single transverse line on the conveyor surface, the planes of light each being at an acute angle to the conveyor. A linear diode array aligned with the single line of light on the conveyor detects light from that line. An object on the conveyor moving through the line of light intercepts the light above the conveyor at positions spaced laterally from the line of light. The linear array senses only the line segments on the conveyor beyond the object boundaries. By electronic sampling of the illumination of the linear array, the object boundaries are determined and the object shape and orientation are thus detected.

4541721, Sep 17, 1985

Mar 17, 1983

6/476431

Robert Dewar - Troy MI

Perceptron, Inc. - Farmington Hills MI

G01B 1100
G01B 1114

356375

Apparatus for optically checking both the gap between two adjacent parts such as the hood-to-fender fit of a vehicle and the surface flushness of the parts employs a hand-held fixture which is adapted to engage edges of the part in order to orient the fixture in a preselected position relative to the gap. A laser and related optical system mounted on the fixture directs a line of collimated light onto the parts and across the gap. The optical system and a television camera on the fixture pick up light reflected from the parts surfaces and generate an image using the triangulation technique which contains measurement information relating to the size of the gap and the degree of surface flushness. A computerized controller converts the image to measurement data that is displayed on a CRT. The control system is used in a part fitting method to select and display the identity of any of a plurality of shims which on an assembly person may employ to create proper fit between the parts.

4254433, Mar 3, 1981

Jun 25, 1979

6/051622

Robert Dewar - Troy MI
Rene M. Iadipaolo - Southfield MI

General Motors Corporation - Detroit MI

H04N 718

358105

The movement of an article such as a product carried by a conveyor is monitored by providing a patterned target, preferably striped with contrasting lines, to move with the object. A solid state line scan camera views the pattern of the target as it moves relative to the camera and the electronic output of the camera representing the light and dark areas of the target is analyzed by an electronic circuit to determined the movement of the target and therefore of the object being monitored. The resulting electronic signal representing the motion of the object is useful for coordinating the movement of a robot which is operating upon the object during its movement.

4645348, Feb 24, 1987

Sep 1, 1983

6/528726

Robert Dewar - Troy MI
Jeremy Salinger - Southfield MI
Thomas J. Waldecker - Ypsilanti MI
Neil E. Barlow - Royal Oak MI

Perceptron, Inc. - Farmington Hills MI

G01B 1124

356376

A three-dimensional triangulation-type sensor-illumination system adapted for connection to a machine vision computer. The illumination source in the preferred system comprises a unique cross hair light pattern which provides sufficient image data to the computer to enable the computer to make three-dimensional measurements of a wide variety of features, including edges, corners, holes, studs, designated portions of a surface and intersections of surfaces. The illumination source and sensor are both mounted within a single housing in a specific position and orientation relative to one another, thereby permitting the system to be internally calibrated. In addition, the sensor-illuminator unit is preferably mounted in a test fixture so that the light source is substantially normal to the surface of the part to be examined and the sensor is thereby positioned at a perspective angle relative thereto.