SENSOR SYSTEM PROCESSING ARCHITECTURE

• US 20110298916A1
• Filed: 04/18/2011
• Published: 12/08/2011
• Est. Priority Date: 04/18/2011
• Status: Abandoned Application

• Current Assignee: LMI Technologies Inc.
• Original Assignee: LMI Technologies Inc.
• Inventors: Arden, Terry
• Application Number:
  US13/089,151
• Publication Number:
  US 20110298916A1
• Time in Patent Office: Days
• US Class Current: 348/86
• CPC Class Codes: G01B 11/14 for measuring distance or clearance between spaced objects or spaced apertures G01B11/26 takes precedence; rangefinders G01C3/00
• CPC Class Codes: G06T 2207/10016 Video; Image sequence
• CPC Class Codes: G06T 2207/20224 Image subtraction
• CPC Class Codes: G06T 5/50 using two or more images, e.g. averaging or subtraction
• CPC Class Codes: G06T 7/13 Edge detection
• CPC Class Codes: G06T 7/254 involving subtraction of images
• CPC Class Codes: G06T 7/80 Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration
• 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: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• CPC Class Codes: H04N 7/181 for receiving images from a plurality of remote sources

Abstract

A system for imaging an area using a plurality of non-contact measurement optical sensors comprises a plurality of substantially identical sensors that detect the presence of a connected network of like sensors, accept the assignment of the role of a managing sensor or a support sensor and individually image a portion of said area. Each sensor may also individually derive image information from its image. The images or image information from each of the plurality of sensors are delivered to the managing sensor which combines them with its own image or image information and that acts as the exclusive client server for delivering the combined image or combined image information to the client.

Claims

1. A system for imaging an area using a plurality of non-contact measurement optical sensors, said system comprising:

a plurality of non-contact measurement optical sensors;

said sensors being networked with one another;

each of said sensors being substantially identical;

each of said sensors comprising a computer-readable medium having recorded thereon instructions that when executed cause the sensor to;

detect the presence of a connected network of like sensors;

accept an assignment of either of alternative roles as a managing sensor or a support sensor;

acquire images of respective portions of said area;

when said each sensor is assigned the role of a managing sensor, to combine image data from respective portions of said area that are respectively acquired by each sensor of said plurality of sensors; and

when said each sensor is assigned the role of a support sensor, to deliver to said managing sensor image data from said portion of said area that was acquired by said support sensor.

2. The system of claim 1 wherein said instructions when executed further cause the sensor to:

when said each sensor is assigned the role of a managing sensor, said managing sensor further acts as a sole server for a client for interfacing with said client and for generating and outputting to said client said combined image data.

3. The system of claim 1 wherein said image data combined by said managing sensor comprises images acquired by respective ones of said plurality of sensors, including by said managing sensor, combined to generate a combined image of said area.

4. The system of claim 1 wherein:

said image data combined by said managing sensor comprises representations of portions of an object within said area;

said representations or portions of said objet are derived by respective ones of said plurality of sensors from said images acquired by said respective ones of said plurality of sensors, including by said managing sensor; and

,

said representations being combined by said managing sensor to generate a combined representation of said object.

5. The system of claim 1 wherein:

said image data combined by said managing sensor comprises partial dimensional information relating to an object within said area; and

,

said dimensional information is derived by respective ones of said plurality of sensors from said images acquired by said respective ones of said plurality of sensors, including by said managing sensor.

6. The system of claim 3, 4 or 5 wherein each of said plurality of sensors is calibrated in relation to a common coordinate reference system.

10. The system of claim 1 wherein said instructions when executed further cause each said sensor, when said each sensor is assigned the role of managing sensor to provide system initialization functions.

11. The system of claim 10 wherein said instructions when executed further cause each said sensor, when said each sensor is assigned the role of managing sensor to provide synchronization signals for image acquisition by said plurality of sensors.

12. The system of claim 1 wherein said instructions when executed further cause each said sensor, when said each sensor is assigned the role of managing sensor to provide meteorological functions,

15. The system of claim 1 wherein said instructions when executed further cause each said sensor to:

detect the presence of a connected network of like sensors;

detect a first connection of a client on said network to one of said sensors;

upon detecting said first connection, said one of said sensors delivering to said client a user interface offering to the client an option for a user to operate the network in multi-sensor mode for imaging said area.

16. The system of claim 15 wherein said instructions when executed further cause each said sensor to:

upon detecting said first connection, said one of said sensors delivering to said client a user interface offering to the client an option for a user to assign an IP address to said one of said sensors.

17. The system of claim 16 wherein said instructions when executed further cause each said sensor to:

upon detecting said first connection, said one of said sensors delivering to said client a user interface offering to the client an option for assign to one of said plurality of sensors the role of a managing sensor.

18. The system of claim 17 wherein said instructions when executed further cause each said sensor to:

where said client fails to assign to one of said plurality of sensors the role of a managing sensor, said one of said sensors to which said client first connected on the network assumes the role of managing sensor.

19. The system of claim 16 or 17 wherein said instructions when executed further cause each said sensor, when said each sensor is assigned the role of managing sensor to retain an assignment of a default IP address when said user does not assign an IP address to said managing sensor.

20. The system of claim 15 wherein said instructions when executed further cause each said sensor to:

when said each sensor is assigned the role of managing sensor, prompt said client to specify a relative spatial arrangement of said plurality of sensors.

21. The system of claim 15 wherein said instructions when executed further cause each said sensor to:

when said each sensor is assigned the role of managing sensor, prompt said client to specify operational parameters for said system.

34. The system of claim 2, wherein said client is a web browser.

35. The system of claim 34, wherein said web browser is on a computer networked to said managing sensor.

36. The system of claim 2, wherein said client is connected to said connected network through a switch.

37. The system of claim 1, wherein said sensors being networked with one another is through Ethernet connections.

38. The system of claim 1, wherein said sensors are laser line projection sensors.

39. The system of claim 1, wherein said sensors are spot sensors.

40. The system of claim 1, wherein said sensors are time of flight sensors.

41. The system of claim 1, wherein said managing sensor transmits timing signals to each of said support sensors to control acquisition of said images.

42. The system of claim 41, wherein said acquisition of said images synchronous.

43. The system of claim 41, wherein said acquisition of said images is asynchronous.

44. The system of claim 1, wherein said managing sensor commences acquisition of said image based on one of direct user input, external signals, or an imaging schedule.

45. The system of claim 1, wherein said managing sensor provides initialization functions for said connected network.

46. The system of claim 1, wherein said managing sensor provides synchronization functions for said connected network.

47. The system of claim 1, wherein said managing sensor provides meteorological functions.

48. The system of claim 1 further comprising a power source.

49. The system of claim 48, wherein said power source is connected to each of said sensors though a cord set.

50. The system of claim 49, wherein said cord set comprises power cables.

51. The system of claim 1 further comprising one or more cable management devices.

52. The system of claim 51, wherein said cable management devices comprise cable splitters.

53. The system of claim 1, wherein said computer-readable medium further comprises an inter-sensor synchronization module for synchronizing timing among said sensors.

54. The system of claim 1, wherein said computer-readable medium further comprises both a managing sensor engine module and a support sensor module.

55. The system of claim 1, wherein said computer-readable medium further comprises a file system module.

56. The system of claim 55, wherein said file system module is used to store calibration records.

57. The system of claim 55, wherein said file system module is used to store user configurations.

58. The system of claim 55, wherein said file system module comprises a database, wherein said database is used to store metrology algorithms.

59. The system of claim 1, wherein said computer-readable medium further comprises a configuration management module for controlling or more of the following:

network awareness, network configuration, selection of user-defined set up, and operational parameters.

7. A system for imaging an area using a plurality of non-contact measurement optical sensors, said system comprising:

a first non-contact measurement optical sensor;

a second non-contact measurement optical sensor in networked communication with said first sensor;

each of said first and second sensors being calibrated in relation to a common coordinate reference system;

said first sensor being configured to;

acquire images of a respective portion of said area;

combine image content relating to respective portions of said area that is acquired by each of said first and second sensors and that is normalized to said common coordinate reference system by each of said first and second sensors;

wherein said combining generates combined image content;

act as a server for a client for interfacing with said client and for generating and outputting to said client user content relating to said combined image content;

8. The system of claim 7 wherein said image data combined by said first sensor comprises images acquired by respective ones of said plurality of sensors, including by said first sensor, combined to generate a combined image of said area.

9. The system of claim 7 wherein said image content combined by said first sensor comprises representations of portions of an object within said area, said representations being derived from said images acquired by respective ones of said plurality of sensors, including by said first sensor, said representations being combined to generate a combined representation of said object.

13. A method for imaging an area, said method comprising the steps of:

a first sensor being calibrated with a second sensor to operate in the same effective coordinate system;

said first sensor creating a first age of a first part of said area;

said second sensor creating a second image of a second part of said area;

said second sensor transmitting said second image to said first sensor through a network connection between said first sensor and said second sensor; and

said first sensor combining said first image and said second image to create a combined image of said area.

14. The method of claim 13, further comprising the step of outputting said combined image from said first sensor to a user device networked to said first sensor.

22. A method for imaging an area, said method comprising the steps of:

a first sensor being calibrated with each of one or more other sensors to operate a common effective coordinate system;

said first sensor creating a first image of a first part of said area;

each of said one or more other sensors creating a second image of another part of said area;

each of said one or more other sensors transmitting said second image to said first sensor through a network connection between said first sensor and each of said one or more other sensors; and

said first sensor combining said first image and said second images to create a combined image of said area.

23. The method of claim 22, further comprising the step of outputting said combined image from said first sensor to a user device networked to said first sensor.

24. A method for measuring a distance between a first edge and a second edge of an object, said method comprising the steps of:

a first sensor being placed spaced apart a known distance from a second sensor;

said first sensor creating a first image of said first edge;

said second sensor creating a second image of said second edge;

said second sensor transmitting said second image to said first sensor through a network connection between said first sensor and said second sensor; and

said first sensor calculating said distance based on said first image and said second image.

25. The method of claim 24, where said known distance is determined by calibrating said first sensor and said second sensor to a common effective coordinate system.

26. A method for measuring a change in an object during an interval of time, said method comprising the steps of:

a first sensor being placed spaced apart from a second sensor;

said first sensor creating a first image of said object at a first time instance;

said second sensor creating a second image of said object at a second time instance;

said second sensor transmitting said second image to said first sensor through a network connection between said first sensor and said second sensor; and

said first sensor determining said change in said object by subtracting said first image from said second image.

27. The method of claim 26, wherein said second time instance occurs after said first time instance.

28. The method of claim 26, further comprising the step of said first sensor being calibrated with said second sensor to operate in a common effective coordinate system.

29. A method for producing a differential profile of an object, said method comprising the steps of:

a first sensor being placed spaced apart, substantially 180 degrees opposite and in substantially an identical plane, to a second sensor, wherein said object is placed between said first sensor and said second sensor;

said first sensor creating a first image of said object;

said second sensor creating a second image of said object;

said second sensor transmitting said second image to said first sensor through a network connection between said first sensor and said second sensor; and

said first sensor combining said first image and said second image to create a differential profile of said object.

30. The method of claim 29, further comprising the step of said first sensor being calibrated with said second sensor to operate in a common effective coordinate system.

31. The method of claim 29, further comprising the step of outputting said combined image from said first sensor to a user device networked to said first sensor.

32. A method for imaging an area, said method comprising the steps of:

networking a plurality of sensors with one another, wherein each of said plurality of sensors are substantially identical;

detecting, by each of said plurality of sensors, the presence of a connected network of said sensors;

accepting, by one of said plurality of sensors, an assignment of a role as a managing sensor;

accepting, by remainder of said plurality of sensors, an assignment of a role as a support sensor;

acquiring, by each of said plurality of sensors, an image of a respective portion of said area;

transmitting, by each of said support sensors to said managing sensor, said images of said respective portions of said area; and

combining, by said managing sensor, said images from said support sensors and said image by said managing sensor to create a combined image of said area.

33. The method of claim 32, further comprising the step of outputting, by said managing sensor, said combined image to a client networked with said connected network of said sensors.