REMOTE CRANE BAR CODE SYSTEM

• US 20100282842A1
• Filed: 04/07/2010
• Published: 11/11/2010
• Est. Priority Date: 08/13/2004
• Status: Active Grant

• Current Assignee: Arcelormittal Dofasco Incorporated (Mittal Steel)
• Original Assignee: Arcelormittal Dofasco Incorporated (Mittal Steel)
• Inventors: Shivji, Aly, Li, Kan, Mueller, Robert Eric
• Granted Patent: US 8,146,814 B2
• Time in Patent Office: Days
• US Class Current: 235/385
• CPC Class Codes: G06K 7/10811 Focalisation
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders
• CPC Class Codes: G06T 2207/30164 Workpiece; Machine component
• CPC Class Codes: G06T 7/0004 Industrial image inspection

Abstract

In general terms, the present invention provides a method of automatically scanning an inventory field to allow the selection of a desired item for retrieval. A camera is positioned in the crane trolley located above the field. The camera continuously performs a scan of the field displaying an image to the operator of the items being scanned. This real-time image allows the operator to distinguish between items scanned in the field. The operator can subsequently choose the desired item triggering the camera system to automatically capture desired information from the item which is in turn communicated to an inventory control system. The camera system mitigates the requirement of a second individual to communicate information between the field and the operator.

Claims

1. A method for remotely scanning objects comprising the steps of:

using an imaging system to display an image of said objects on an interface;

receiving a location input of an identification tag attached to a desired object based on a location in said image;

using said location input to orient said imaging system towards said identification tag;

magnifying said identification tag;

analysing said image using an array of two-dimensional sensors to determine the deviation of said tag within said image with respect to a preferred position;

aligning said tag by adjusting said orientation; and

reading information identifying characteristics of said desired object provided by said tag.

2. A method according to claim 1 wherein said imaging system comprises a first camera, said first camera having a fixed magnification and a second camera, said second camera having an adjustable magnification for performing said step of magnifying said identification tag.

3. A method according to claim 2 wherein said first camera maintains a fixed magnification, such that said image includes a plurality of said objects;

and said second camera includes a zoom lens that maintains a first magnification that corresponds to a predetermined estimate of the required magnification to focus said tag, and is operable between a plurality of magnifications to enable the magnification of said tag to be adjusted.

4. A method according to claim 1 wherein said imaging system includes a smart camera, said smart camera having an internal processor for executing said steps.

5. A method according to claim 1 wherein said location input is correlated to a field position determined by a range finder system, said correlation being used to determine the location of said desired object in said field.

6. A method according to claim 1 comprising the step of illuminating the field of view of the imaging system.

7. A method according to claim 1 wherein prior to displaying said image, said method comprises the step of obtaining a system identifier code.

9. A method according to claim 1 further comprising the step of sending said information to an inventory control system for monitoring the distribution of said objects.

8. A method according to claim 8 wherein said system identifier code is provided by a dongle connected to said imaging system.

10. A system for remotely scanning objects comprising:

an imaging system positioned remotely from said objects and arranged to image said objects, said imaging system having an adjustable lens for magnifying said image;

an interface for displaying an image of said objects and adapted for receiving a location input for an identification tag attached to a desired object based on a location in said image; and

a processor connected to said imaging system and said interface;

wherein said processor uses said location input to orient said imaging system towards said tag, commands said adjustable lens to magnify said tag, analyses said image using an array of two dimensional sensors to determine the deviation of said tag within said image with respect to a preferred position, aligns said tag by adjusting the orientation of said imaging system, and reads information identifying characteristics of said desired object provided by said tag.

11. A system according to claim 10 wherein said imaging system comprises a first camera, said first camera having a fixed magnification;

and a second camera, said second camera comprising said adjustable lens for magnifying said tag.

12. A system according to claim 10 wherein said imaging system has an adjustment drive adapted for providing pan and tilt operations.

13. A system according to claim 10 further comprising an inventory control system connected to said processor, said inventory control system being used to receive said information identifying characteristics of said desired object from said processor, for identification thereof;

wherein said inventory control system updates a record of said objects.

14. A system according to claim 10 wherein said imaging system includes a smart camera having an internal processor.

15. A system according to claim 10 further comprising a range finder system for determining the location of said desired object in said field and to correlate said location input to said location of said desired object in said field.

16. A system according to claim 10 further comprising an illumination system for illuminating the field of view of the imaging system.

17. A system according to claim 16 wherein said illumination system comprises a least one row of light emitting diode (LED) lights.

18. A system according to claim 17 comprising two rows of said LED lights and at least one row of infrared lights.

19. A system according to claim 10 comprising a dongle connected to said imaging system having a system identifier code.

20. A method for aligning a tag in an image, said tag being affixed to an object and having indicia thereon, said method comprising the steps of:

obtaining an image of said object having at least a portion of said tag visible in said image;

arranging an array of two-dimensional sensors on said image;

identifying markings in each of said sensors, said at least one marking indicative of the presence of a particular feature of said tag;

computing an average position of said markings to determine a deviation of said average position from a preferred position; and

aligning said tag in said image according to said deviation.