Verifying a slider tray map

• US 8,903,122 B2
• Filed: 03/15/2013
• Issued: 12/02/2014
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Western Digital Technologies Incorporated (Western Digital Corporation)
• Original Assignee: HGST Netherlands B.V. (Western Digital Corporation)
• Inventors: Cansancio, Justice D., Palejaro, Mark Lven T., Pelo, Luis A., Rullan, Quintin L. Jr., Sadiasa, Rufino F. Jr.
• Primary Examiner(s): Kassa, Yosef
• Application Number:
  US13/842,255
• Publication Number:
  US 20140270333A1
• Time in Patent Office: 627 Days
• Field of Search: 382/141, 382/145, 382/149, 382/152, 382/153, 361/679.33, 361/679.37
• US Class Current: 382/100
• CPC Class Codes: G06T 2207/30242 Counting objects in image
• CPC Class Codes: G06T 7/0004 Industrial image inspection

Abstract

A hard disk drive manufacture process may use a database to track the sliders stored within a slider tray. Instead of requiring an operator to visually inspect each tray to confirm that the database information is accurate, the trays may be sent to a detection system that uses a computer vision technique to identify the total number of sliders in a tray. In one embodiment, the computer vision technique may also determine where the sliders are stored in the slider tray—e.g., a particular row and column. If the information obtained using the computer vision technique differs from the information stored in the database, the system may perform one or more actions for correcting the discrepancy. In this manner, the computer vision technique may be used to update and confirm the slider tracking information stored in the database.

Claims

1. A method of tracking a disk drive component, comprising:

generating a template using a first tray that is not currently storing any disk drive components, wherein the first tray comprises a plurality of apertures configured for respectively storing an individual disk drive component;

receiving an image of a second tray that contains one or more disk drive components;

determining a number of disk drive components stored in the second tray by comparing the received image to the template;

comparing the determined number of disk drive components to a disk drive quantity stored in a database entry associated with the second tray; and

upon determining that the number of disk drive components is different than the disk drive quantity, selecting an action that, when performed, updates the database entry.

2. The method of claim 1, wherein the plurality of apertures in the first tray and a plurality of apertures in the second tray are arranged in rows and columns, wherein the first tray comprises at least one reference position that is used when generating the template.

3. The method of claim 2, wherein the reference position is used to compensate for an orientation misalignment between an orientation of the first tray on a mount and an orientation of an image capturing device that records the image.

4. The method of claim 1, further comprising:

determining a unique location of each disk drive component in the second tray by comparing the received image to the template;

comparing the unique location to a location table in the database entry associated with the second tray; and

upon determining that the unique location is not contained within the location table, selecting an action that updates the location table to include the unique location.

5. The method of claim 4, upon determining that the location table stores a disk drive component location that does not correspond to any of the unique locations, removing the disk drive component location from the location table.

6. The method of claim 1, wherein the disk drive component is a slider comprising a write portion for writing data to a magnetic media and a read portion for reading data from the magnetic media.

7. The method of claim 1, wherein the action is at least one of:

altering an operator of the difference between the number of disk drive components and the disk drive quantity and updating the database entry.

8. A system for tracking disk drive components, comprising:

a first tray including a plurality of apertures configured for respectively storing an individual disk drive component;

a second tray for storing at least one of the disk drive components;

an image capturing device configured to capture digital images of the first tray and second tray;

a computer vision module for receiving the digital images, wherein the computer vision module is configured to;

generate a template using a digital image of the first tray;

determine a number of disk drive components stored in the second tray by comparing the received image to the template;

compare the determined number of disk drive components to a disk drive quantity stored in a database entry associated with the second tray; and

upon determining that the number of disk drive components is different than the disk drive quantity, select an action that, when performed, updates the database entry.

9. The system of claim 8, wherein the plurality of apertures in the first tray and a plurality of apertures in the second tray are arranged in rows and columns, wherein the first tray comprises at least one reference position that is used when generating the template.

10. The system of claim 9, wherein the reference position is used by the computer vision module to compensate for an orientation discrepancy between an orientation of the first tray on a mount and an orientation of the image capturing device.

11. The system of claim 8, wherein the computer vision module is further configured to:

determine a unique location of each disk drive component in the second tray by comparing the received image to the template;

compare the unique location to a location table in the database entry associated with the second tray; and

upon determining that the unique location is not contained within the location table, select an action that updates the location table to include the unique location.

12. The system of claim 11, wherein the computer vision module is further configured to, upon determining that the location table stores a disk drive component location that does not correspond to any of the unique locations, remove the disk drive component location from the location table.

13. The system of claim 8, further comprising a database comprising a plurality of database entries, wherein the database is configured to maintain a database entry of the plurality of database entries that corresponds to the second tray.

14. The system of claim 8, wherein the disk drive component is a slider comprising a write portion for writing data to a magnetic media and a read portion for reading data from the magnetic media.

15. A computer program product for tracking a disk drive component in a power plant, the computer program product comprising:

a non-transitory computer-readable storage medium having computer-readable program code embodied therewith, the computer-readable program code being configured to;

generate a template using a first tray that is not currently storing any disk drive components, wherein the first tray comprises a plurality of apertures configured for respectively storing an individual disk drive component;

receive an image of a second tray that contains one or more disk drive components;

determine a number of disk drive components stored in the second tray by comparing the received image to the template;

compare the determined number of disk drive components to a disk drive quantity stored in a database entry associated with the second tray; and

upon determining that the number of disk drive components is different than the disk drive quantity, select an action that, when performed, updates the database entry.

16. The computer program product of claim 15, wherein the plurality of apertures in the first tray and a plurality of apertures in the second tray are arranged in rows and columns, wherein the first tray comprises at least one reference position that is used when generating the template.

17. The computer program product of claim 16, wherein the reference position is used to compensate for an orientation misalignment between an orientation of the first tray on a mount and an orientation of an image capturing device that records the image.

18. The computer program product of claim 15, wherein the computer-readable program code is further configured to:

determine a unique location of each disk drive component in the second tray by comparing the received image to the template;

compare the unique location to a location table in the database entry associated with the second tray; and

upon determining that the unique location is not contained within the location table, select an action that updates the location table to include the unique location.

19. The computer program product of claim 18, wherein the computer-readable program code is further configured to, upon determining that the location table stores a disk drive component location that does not correspond to any of the unique locations, remove the disk drive component location from the location table.

20. The computer program product of claim 15, wherein the disk drive component is a slider comprising a write portion for writing data to a magnetic media and a read portion for reading data from the magnetic media.