3D MACHINE VISION SCANNING INFORMATION EXTRACTION SYSTEM

• US 20140114461A1
• Filed: 06/11/2012
• Published: 04/24/2014
• Est. Priority Date: 06/10/2011
• Status: Abandoned Application

• Current Assignee: Hermary Opto Electronics Inc.
• Original Assignee: Hermary Opto Electronics Inc.
• Inventors: Hermary, Terrance John, Hermary, Alexander Thomas, Sahraei, Mohammad Reza
• Application Number:
  US14/125,089
• Publication Number:
  US 20140114461A1
• Time in Patent Office: Days
• US Class Current: 700/163
• CPC Class Codes: G01B 11/25 by projecting a pattern, e.g. one or more lines, moiré fringes on the object G01B11/255 takes precedence ; image analysis for depth or shape recovery G06T7/50
• CPC Class Codes: G05B 19/4097 characterised by using design data to control NC machines, e.g. CAD/CAM G05B19/4093 takes precedence

Abstract

A three-dimensional machine vision scanner head for obtaining raw scan data from a target object and an integrated scan information extraction module that performs data reduction and passes to a controller selected summary target object scan information that is significant for automated control decisions in an industrial process. The scanner head contains a laser light emitter, reflected laser light detector and a communication interface for transmitting the target object scan information from the information extraction module to the controller.

Claims

1. A 3D machine vision scanning system having:

a) a scanner head for obtaining raw scan data from a target object,

b) an information extraction module that processes and reduces the raw scan data into target object information that is to be used for automated control decisions in an industrial process, and

c) a communication interface for transmitting the target object scan information to a controller.

2. The 3D machine vision scanning system of claim 1 in which the scanner head contains:

a) a laser light emitter and a reflected laser light detector;

b) the information extraction module that processes and reduces raw scan data into target object information that is significant for control decisions in an automated industrial process, and

c) the communication interface for transmitting the target object scan information to a controller.

3. The 3D machine vision scanning system of claim 1 in which the scanner head contains:

a) a laser light emitter and a reflected laser light detector;

b) an electronic scan data processor having a set of embedded mathematical functions to extract key target object information from scan data;

for reduction of data transmission and reduction of complexity of subsequent processing and decision analysis in an industrial control system.

8. The 3D machine vision scanning system of claim 1, in which an information extraction tool is applied to scan data from a controller-selectable range of number of scan profiles, and resulting scan information is transmitted to the controller, before the information extraction tool is applied to a subsequent number of scan profiles selected.

12. The 3D machine vision scanning system of claim 1, combined with multiple like scanner heads connected to a communication multiplexer that passes extracted target object scan information to a controller.

13. The 3D machine vision scanning system of claim 1, in which a set of scan information extraction tools, comprising at least one of:

a) an extrema derivation tool,

b) a profile tracking tool,

c) a profile matching tool, and

d) an area summing tool is integrated into a scanner head.

20. The 3D machine vision scanning system of claim 12, in which a time division multiplexer encoder enables communication from multiple scanner heads to a controller and includes timing synchronization so each scanner can be phase locked.

21. The 3D machine vision scanning system of claim 1, in which data reduction is performed on successive data profiles, each data profile being a series of imaged points on an X-axis and a Y-axis, the successive data profiles being on a Z-axis to make up an entire 3D scan of a portion of a target object that is visible to the scanner.

22. The 3D machine vision scanning system of claim 1, in which laser triangulation is used to image the intersection of an object and a reference laser beam to generate X-Y slice profiles that are then combined incrementally along a Z-axis into a 3D raw data point cloud representation.

23. The 3D machine vision scanning system of claim 1, in which a scanner head that extracts key scan information from raw profile (X-Y) scan data passes to the controller only the scan information that the controller needs to perform its functions.

25. The 3D machine vision scanning system of claim 1, in which key target object scan information is formatted within a scanner head into an open standard communication protocol.

26. The 3D machine vision scanning system of claim 1, in which a scan head'"'"'s X-Y-Z coordinates are not coincident with its industrial environment X-Y-Z coordinates and the information extraction module performs orientation adjustment calculations on X and Y data points and passes orientation adjusted target object information to the controller.

27. The 3D machine vision scanning system of claim 26, in which the controller can remotely set orientation adjustment calculation parameters for the information extraction module to use in performing the orientation adjustment calculations on X and Y axis data points.

28. The 3D machine vision scanning system of claim 1, in which multiple scanner heads are mounted in different orientations and are synchronized in order to provide information from different regions of interest on a target object.

29. The 3D machine vision scanning system of claim 1, in which the information extraction module applies an information extraction tool to scan data from a range of scans in the Z axis.

30. The 3D machine vision scanning system of claim 2 in which:

a) the scanner head is a sealed scanner head contains a laser light emitter and a reflected laser light detector and an electronic scan data processor having a set of embedded mathematical functions to extract key target object information from scan data;

b) a computation method to be used by the information extraction module is selectable by the controller choosing from among a set of key scan information extraction tools;

31. The 3D machine vision scanning system of claim 30, in which:

a) key scan information extraction tools include a multiplicity of predefined, controller-selectable regions of interest

b) an information extraction tool is applied to scan data from a controller-selectable range of number of scan profiles, and resulting scan information is transmitted to the controller, before the information extraction tool is applied to a subsequent number of scan profiles selected.

32. The 3D machine vision scanning system of claim 31, in which:

a) the scanner head extracts key scan information from raw profile (X-Y) scan data and passes to the controller only the scan information that the controller needs to perform its functions;

b) the key target object scan information is formatted within the scanner head into an open standard communication protocol.

33. The 3D machine vision scanning system of claim 31, in which the scanner head is combined with multiple like scanner heads mounted in different orientations and connected to a communication time division multiplexer that includes timing synchronization so each scanner head can be phase locked and synchronized and pass extracted target object scan information about different regions of interest on a target object from the scanner heads to a controller.

4. (canceled)

5. (canceled)

7. The 3D machine vision scanning system of claim 5, in which key scan information extraction tools include a multiplicity of predefined, controller-selectable regions of interest.

6. (canceled)

9. (canceled)

10. (canceled)

11. (canceled)

14. (canceled)

15. (canceled)

16. (canceled)

17. (canceled)

18. (canceled)

19. (canceled)

24. (canceled)