Method and apparatus for determining the configuration of a workpiece

• US 6,226,395 B1
• Filed: 04/01/1997
• Issued: 05/01/2001
• Est. Priority Date: 04/22/1996
• Status: Expired due to Fees

• Current Assignee: Malcolm T. Gilliland
• Original Assignee: Malcolm T. Gilliland
• Inventors: Gilliland, Malcolm T.
• Primary Examiner(s): MEHTA, BHAVESH M
• Application Number:
  US08/829,949
• Time in Patent Office: 1,491 Days
• Field of Search: 382/106, 382/108, 382/141, 382/153, 382/154, 382/312, 382/318, 382/319, 382/322, 348/86, 348/90, 348/91, 348/94, 348/42, 348/47, 358/474
• US Class Current: 382/152
• CPC Class Codes: B23K 9/1274 Using non-contact, optical means, e.g. laser means
• CPC Class Codes: G05B 19/401 characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes G05B19/19 takes precedence
• CPC Class Codes: G05B 2219/37208 Vision, visual inspection of workpiece
• CPC Class Codes: G05B 2219/37555 Camera detects orientation, position workpiece, points of workpiece
• CPC Class Codes: G05B 2219/40293 Gantry, portal
• CPC Class Codes: G06T 7/55 from multiple images

Abstract

The present invention provides a method and an apparatus for scanning an object to obtain data on the object and determine the configuration of the object. A gantry (12) allows movement along a first direction (A-A′). A set of platforms (14A, 14B) allows movement along a second direction (B-B′). A set of scanning heads (16A, 16B) provide additional degrees of freedom and also provide for scanning the object (10) to obtain information about the object. The freedom of movement provided by the gantry, the platforms, and the scanning heads allows the object to be completely scanned. In addition, once the initial scanning process has been completely, areas which require additional scanning, such as compartments (10D), are identified. The scanning heads are then positioned, such as directly above or inside a compartment, and then the compartment is scanned to obtain information about the compartment that could not be obtained from the initial scanning procedure. The data obtained from the initial scan and any subsequent scans is processed to determine the configuration of the object. The information concerning the configuration is then used to perform a welding, cutting or other operation on the object.

Claims

1. A method for providing an identification of the elements of an object for a welding process, comprising the steps of:

setting a scanning device to view a first position on said object;

causing said scanning device to scan said object from said first position to a second position to obtain distance measurements between said scanning device and a corresponding plurality of points on said object;

setting said scanning device to view a next position on said object;

causing said scanning device to scan said object from said next position to a subsequent position to obtain additional distance measurements between said scanning device and a next corresponding plurality of points on said object;

repeating said steps of setting said scanning device to view said next position and causing said scanning device to scan from said next position to said subsequent position to obtain additional distance measurements on said object until the desired portion of said object has been scanned;

processing said distance measurements and said additional distance measurements to identify said elements of said object and to generate an identification of said elements; and

providing said identification of said elements to said welding process.

2. A method for providing an identification of the elements of an object for a welding process, comprising the steps of:

causing a scanning device to scan said object in a first manner to obtain a first plurality of distance measurements between said scanning device and a corresponding plurality of points on said object;

causing a scanning device to scan said object in a second manner to obtain a second plurality of distance measurements between said scanning device and said corresponding plurality of points on said object;

processing said first plurality of distance measurements and said second plurality of distance measurements to identify said elements of said object and to generate an identification of said elements; and

providing said identification of said elements to said welding process.

3. A method for providing an identification of the elements of an object for a welding process, comprising the steps of:

causing a scanning device to scan said object in a linear manner to obtain a first plurality of distance measurements between said scanning device and a corresponding plurality of points on said object;

identifying areas of said object for which additional distance measurements are needed;

causing a scanning device to scan said areas to obtain said additional distance measurements;

processing said distance measurements and said additional distance measurements to identify said elements of said object and to generate an identification of said elements; and

providing said identification of said elements to said welding process.

4. An apparatus for providing an identification of the elements of an object for a welding process, comprising:

scanning means for scanning said object to obtain a plurality of distance measurements between said scanning means and a corresponding plurality of points on said object;

first means for moving said scanning means along a first path to obtain a set of said distance measurements;

second means for moving said scanning means along a second path to obtain additional said distance measurements; and

control means for controlling the operation of said scanning means, said first means, and said second means, for receiving said set of distance measurements and said additional distance measurements, for processing said set of distance measurements and said additional distance measurements to identify said elements of said object and to generate an identification of said elements, and for providing said identification of said elements to said welding process.

5. An apparatus for providing an identification of the elements of an object for a welding process, comprising:

scanning means for scanning said object to obtain a plurality of distance measurements between said scanning means and a corresponding plurality of points on said object;

first means for moving said scanning means along a first path;

second means for moving said scanning means along a second path; and

control means for controlling the operation of said scanning means, said first means, and said second means, for receiving said distance measurements, for processing said distance measurements to determine areas of said object for which additional distance measurements are needed, for controlling the operation of said scanning means, said first means, and said second means to obtain said additional distance measurements, for processing said distance measurements and said additional distance measurements to identify said elements of said object and to generate an identification of said elements, and for providing said identification of said elements to said welding process.

6. An apparatus for providing an identification of the elements of an object for a welding process, comprising:

scanning means for scanning said object to obtain a plurality of distance measurements between said scanning means and a corresponding plurality of points on said object;

first means for moving said scanning means along a first linear path to obtain a set of said distance measurements;

second means for moving said scanning means along a second linear path orthogonal to said first linear path to obtain additional said distance measurements; and

control means for controlling the operation of said scanning means, said first means, and said second means, for receiving said set of distance measurements and said additional distance measurements, for processing said set of distance measurements and said additional distance measurements to identify said elements of said object and to generate an identification of said elements, and for providing said identification of said elements to said welding process.