Key blank identification system with groove scanning

• US 9,934,448 B2
• Filed: 11/15/2016
• Issued: 04/03/2018
• Est. Priority Date: 05/01/2009
• Status: Active Grant

• Current Assignee: Hy-Ko Products Company
• Original Assignee: Hy-Ko Products Company
• Inventors: Thompson, Chester O. D., Mutch, William R.
• Primary Examiner(s): Hausmann, Michelle M
• Application Number:
  US15/351,634
• Publication Number:
  US 20170061240A1
• Time in Patent Office: 504 Days
• Field of Search: None
• CPC Class Codes: B23C 2235/12 Using a database to store details of the key, the information in the database being used for the generation of the profile of the key
• CPC Class Codes: B23C 2235/41 Scanning systems
• CPC Class Codes: B23C 3/35 Milling grooves in keys
• CPC Class Codes: G06T 2207/10141 Special mode during image acquisition
• CPC Class Codes: G06T 7/62 of area, perimeter, diameter or volume
• CPC Class Codes: G06V 10/147 Details of sensors, e.g. sensor lenses fingerprint or palmprint sensors G06V40/13; vascular sensors G06V40/145; eye sensors G06V40/19
• CPC Class Codes: G06V 10/46 Descriptors for shape, contour or point-related descriptors, e.g. scale invariant feature transform [SIFT] or bags of words [BoW]; Salient regional features colour feature extraction G06V10/56
• CPC Class Codes: G06V 20/647 by matching two-dimensional images to three-dimensional objects
• CPC Class Codes: G06V 20/66 Trinkets, e.g. shirt buttons or jewellery items recognising microscopic objects G06V20/69
• CPC Class Codes: H04N 23/90 Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums
• CPC Class Codes: Y10T 409/300952 to cut lock key
• CPC Class Codes: Y10T 409/301008 Using templet other than a key
• CPC Class Codes: Y10T 409/301064 Complete cycle

Abstract

A key identification system is provided. The key identification system comprises an imaging system to capture an image of a master key, and a logic to analyze the captured image. The imaging system may be capture an image of a groove in the master key from an angle between perpendicular and parallel to the blade of said master key. The logic analyzes the captured image to compare characteristics of the groove with groove characteristics of known key blanks to determine the likelihood of a match between the master key and a known key blank. The key identification system may further compensate for displacement or orientation of the master key with respect to the imaging system when analyzing characteristics of the groove.

Claims

1. A key identification system comprising:

an imaging system including a camera configured to capture an image of the tip of a master key, wherein said image includes a contour;

a logic configured to analyze said captured image to determine characteristics of said contour and compare said characteristics with characteristics of known key blanks to determine the likelihood of a match between said master key and a known key blank; and

wherein said logic accounts for positional variations of said master key with respect to said imaging system to determine characteristics of said contour.

2. The key identification system of claim 1, wherein said logic includes a database containing data related to characteristics of grooves of known key blanks.

3. The key identification system of claim 1, wherein said imaging system includes a reflecting device.

4. The key identification system of claim 1, wherein said imaging system includes a light.

5. The key identification system of claim 4, wherein said light is directed toward said reflecting device.

6. The key identification system of claim 5, wherein said light includes a shield to direct light away from said master key.

7. The key identification system of claim 1, wherein said captured image is a digital image.

8. The key identification system of claim 1, wherein said captured image comprises a silhouette of said tip of said master key.

9. The key identification system of claim 1, wherein said positional variations include rolling of said master key with respect to said imaging system to determine characteristics of said contour.

10. The key identification system of claim 1, wherein said positional variations include tilting of said master key with respect to said imaging system to determine characteristics of said contour.

11. The key identification system of claim 1, wherein said positional variations include tipping of said master key with respect to said imaging system to determine characteristics of said contour.

12. The key identification system of claim 1 wherein said captured image comprises a silhouette of the blade of said master key.

13. The key identification system of claim 1, wherein said characteristics of said contour are determined based on image data from at least said two or more views of said master key.

14. The key identification system of claim 13, wherein said logic calculates the geometry of the contour as seen from a view of the tip parallel to the blade based on data from at least said two or more views of said master key.

15. The key identification system of claim 13, wherein said logic calculates the geometry of the contour as though the tip were squarely cut based on data from at least said two or more views of said master key.

16. The key identification system of claim 1 further comprising a key holder configured to hold said master key.

17. The key identification system of claim 16, wherein said key holder includes a lower support.

18. The key identification system of claim 16, wherein said key holder includes an upper door.

19. The key identification system of claim 16, wherein said key bolder includes a clamp.

20. The key identification system of claim 1, wherein one of said views of said master key includes a view from above the master key blade of a groove in the bottom of said blade.

21. The key identification system of claim 1, wherein one of said views of said master key includes a view from an angle between perpendicular and parallel to the blade of said master key and not including perpendicular or parallel to the blade of said master key.

22. The key identification system of claim 1, wherein the captured image of said tip includes a contour of a groove in said master key.

23. The key identification system of claim 1, wherein the logic is configured to shift data related to said characteristics of said contour to compare with said known key blank characteristics.

24. The key identification system of claim 1, wherein said logic includes a tolerance range for each characteristic of said master key to determine whether a master key passes or fails to match a known key blank.