Neutron-beam based scanning system having an automatic object identification and attribute information acquisition and linking mechanism integrated therein

• US 6,923,374 B2
• Filed: 06/06/2002
• Issued: 08/02/2005
• Est. Priority Date: 03/24/1998
• Status: Expired due to Fees

• Current Assignee: Metrologic Instruments Incorporated (Honeywell International Inc.)
• Original Assignee: Metrologic Instruments Incorporated (Honeywell International Inc.)
• Inventors: Knowles, C. Harry, Fisher, Dale, Schmidt, Mark C.
• Primary Examiner(s): Stcyr, Daniel
• Application Number:
  US10/165,180
• Publication Number:
  US 20030080192A1
• Time in Patent Office: 1,153 Days
• Field of Search: 235/454, 235/462, 235/472
• US Class Current: 235/454
• CPC Class Codes: G02B 19/0014 at least one surface having optical power
• CPC Class Codes: G02B 19/0052 the light source comprising a laser diode coupling into light guides using intermediate optical elements G02B6/4204; semiconductor lasers having optical devices external to the laser cavity H01S5/005
• CPC Class Codes: G02B 19/0085 for use with both a detector and a source , e.g. in a transceiver, G02B19/009, G02B19/0095 take precedence
• CPC Class Codes: G02B 19/009 for use with infrared radiation
• CPC Class Codes: G02B 19/0095 for use with ultraviolet radiation
• CPC Class Codes: G02B 26/10 Scanning systems
• CPC Class Codes: G02B 27/095 Refractive optical elements
• CPC Class Codes: G02B 27/48 Laser speckle optics
• CPC Class Codes: G06K 7/10 by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
• CPC Class Codes: G06K 7/10594 Beam path
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10732 Light sources
• CPC Class Codes: G06K 7/146 the method including quality enhancement steps
• CPC Class Codes: G06Q 10/00 Administration; Management
• CPC Class Codes: G06Q 30/00 Commerce
• CPC Class Codes: G06V 20/62 Text, e.g. of license plates, overlay texts or captions on TV images
• CPC Class Codes: G06V 30/144 using a slot moved over the image; using discrete sensing elements at predetermined points; using automatic curve following means
• CPC Class Codes: H01S 5/005 Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping H01S5/026, H01S5/18388 take precedence
• CPC Class Codes: H01S 5/02325 Mechanically integrated components on mount members or optical micro-benches
• CPC Class Codes: H01S 5/4025 Array arrangements, e.g. constituted by discrete laser diodes or laser bar H01S5/42 takes precedence

Abstract

A Pulsed Fast Neutron Analysis (PFNA) object scanning-tunnel system for automatically acquiring and linking object identity and attribute information about each object transported therethrough while bearing a bar code symbol and/or graphical indicia on the exterior surface thereof. The system comprises a scanning-tunnel housing through which one or more objects can be transported. A planar light illumination (PLIIM) based subsystem, is mounted within said scanning-tunnel housing, and includes a pair of planar light illumination arrays (PLIAs) for producing a planar light illumination beam (PLIB) for illuminating the exterior surface of each object. A linear image formation and detection (IFD) module automatically forms and detects digital linear images of the bar code symbol and/or graphical indicia thereon. An image processing computer buffers and processes the digital linear images so to construct a 2-D image of the bar code symbol and/or identifying graphical indicia on the object, and then processes the 2-D image so as to read the bar code symbol and/or identifying graphical indicia, and identify the object by producing object identification information. A PFNA scanning subsystem mounted within the scanning-tunnel housing, produces a neutron energy beam for scanning the interior and/or contents of each object, and automatically produces PFNA images of the object'"'"'s interior and/or contents. An information linking computer subsystem automatically links (i) PFNA images of the interior and/or contents of each transported object, with (ii) object identification information, for storage within a relational database management system (RDBMS) for subsequent access and retrieval. By virtue of the present invention, object attribute information is automatically linked to object identity information, and the resulting composite information set is stored in a relational database management system (RDBMS) for subsequent retrieval and use in diverse applications.

Claims

1. A pulsed fast neutron analysis (PFNA) based object scanning-tunnel system for automatically acquiring and linking object identity and attribute information about each object transported through said PFNA object scanning-tunnel system while bearing a bar code symbol and/or identifying graphical indicia on the exterior surface thereof, said PFNA based object scanning-tunnel system comprising:

a scanning-tunnel housing having an input port and an output port, through which one or more objects can be transported;

a planar light illumination and imaging (PLIIM) based subsystem, integrated within said scanning-tunnel housing, and including

a pair of planar light illumination arrays (PLIAs) for producing a planar light illumination beam (PLIB) for illuminating the exterior surface of each object and the bar code symbol thereon as said object is transported through said scanning tunnel,

a linear image formation and detection (IFD) module for automatically forming and detecting digital linear images of the bar code symbol thereon, as said object is transported through said scanning tunnel, and

an image processing computer for buffering and processing said digital linear images of said object so to construct a 2-D image of the bar code symbol and/or graphical indicia on said object, and processing said 2-D image so as to read said bar code symbol, and identify said object by producing object identity information;

a PFNA scanning subsystem mounted within said scanning-tunnel housing, for producing a neutron energy beam for scanning the interior and/or contents of each object transported through said scanning tunnel, and automatically producing PFNA images of said interior and/or contents; and

an information linking computer subsystem programmed for automatically linking (i) PFNA images of the interior and/or contents of each said transported object produced by said PFNA scanning subsystem, with (ii) object identification information produced by said PLIIM-based subsystem, for storage within a relational database management system (RDBMS) for subsequent access and retrieval.

2. The PFNA based object scanning-tunnel system of claim 1, which further comprises a object dimensioning subsystem for automatically laser scanning the exterior of each said object transported through said scanning tunnel, and producing object dimension information on the dimensions of the scanned object.

3. The PFNA based object scanning-tunnel system of claim 2, wherein said object dimensioning subsystem and said PLIIM-based subsystem are integrated within a common system housing having first, second and third light transmission apertures linearly aligned with and optically isolated from each other, and said third light transmission aperture being disposed between said first and second light transmission apertures.

4. The PFNA based object scanning-tunnel system of claim 3, wherein said linear image formation and detection (IFD) module has an image formation optics with a field of view projectable through said third light transmission aperture and onto said object moving relative to said first, second and third light transmission apertures during object illumination and imaging operations;

and each said planar laser illumination array (PLIA) includes a plurality of laser diodes arranged together in a linear manner and said PLIAs being arranged in relation to said linear image formation and detection module, and for producing a pair of planar laser illumination beams (PLIBs), and projecting said pair of PLIBs through said first and second light transmission apertures and oriented such that the plane of said PLIBs is coplanar with the field view of said linear image formation and detection module so that the object can be simultaneously illuminated by said PLIBs and imaged within said field of view of said linear image formation and detection module,

whereby a series of linear images of said object are sequentially detected by said linear image formation and detection module as said object moves past first, second and third light transmission apertures, so that said series of linear images can be grabbed and buffered for subsequent use in constructing two-dimensional images of said object.

5. The PFNA based object scanning-tunnel system of claim 4, wherein said PLIIM-based subsystem further comprises:

an image frame grabber for grabbing digital linear images formed and detected by said image formation and detection module,

an image data buffer for buffering said grabbed digital linear images for subsequent processing by said image processing computer; and

a camera control computer for controlling said linear image formation and said detection module, and said pair of planar laser illumination arrays.

6. The PFNA based object scanning-tunnel system of claim 4, wherein said image forming optics have a variable focal distance and a variable focal length providing a variable field of view.

7. The PFNA based object scanning-tunnel system of claim 3, wherein said linear image formation and detection (IFD) module has image formation optics with a field of view projectable through said third light transmission aperture and onto said object moving relative to said first, second and third light transmission apertures during object illumination and imaging operations;

and each said planar light illumination array (PLIA) including a plurality of light emitting diodes (LEDs) arranged together in a linear manner and said planar light illumination arrays being arranged in relation to said linear image formation and detection module, and for producing a pair of planar light illumination beams (PLIBs), and projecting said pair of planar light illumination beams through said first and second light transmission apertures and oriented such that the plane of said planar light illumination beams is coplanar with the field of view of said linear image formation and detection module so that the object can be simultaneously illuminated by said planar light illumination beams and imaged within said field of view of said linear image formation and detection module,

whereby a series of linear images of said object are sequentially detected by said linear image formation and detection module as said object moves past first, second and third light transmission apertures, so that said series of linear images can be grabbed and buffered for subsequent use in constructing two-dimensional images of said object.

8. The PFNA based object scanning-tunnel system of claim 4, wherein said PLIIM-based subsystem further comprises:

an image frame grabber for grabbing digital linear images formed and detected by said image formation and detection module,

an image data buffer for buffering said grabbed digital linear images for subsequent processing by said image processing computer; and

a camera control computer for controlling said linear image formation and said detection module, and said pair of planar laser illumination arrays.

9. The PFNA based object scanning-tunnel system of claim 4, wherein said image formation optics have a variable focal distance and a variable focal length providing a variable field of view.

10. The PFNA based object scanning-tunnel system of claim 1, wherein said information linking computer subsystem is integrated within said common system housing.

11. A pulsed fast neutron analysis (PFNA) based cargo scanning-tunnel system for automatically acquiring and linking cargo-container identity and attribute information about each cargo-container transported through said PFNA object scanning-tunnel system while bearing a bar code symbol and/or both identifying graphical indicia on the exterior surface thereof, said PFNA based cargo scanning-tunnel system comprising:

a scanning-tunnel housing having an input port and an output port, through which one or more objects can be transported;

a PLIIM-based subsystem, integrated within said scanning-tunnel housing, and including

a pair of planar light illumination arrays (PLIAs) for producing a planar light illumination beam (PLIB) for illuminating the exterior surface of each cargo-container and the bar code symbol thereon as said object is transported through said scanning tunnel,

a linear image formation and detection (IFD) module for automatically forming and detecting digital linear images of the bar code symbol thereon, as said cargo-container is transported through said scanning tunnel, and

an image processing computer for buffering and processing said digital linear images of said cargo-container so to construct a 2-D image of the bar code symbol and/or identifying graphical indicia on said cargo-container, and processing said 2-D image so as to read said bar code symbol, and identify said cargo-container by producing cargo-container identity information;

an PFNA scanning subsystem mounted within said scanning-tunnel housing, for producing a neutron energy beam for scanning the interior and/or contents of each cargo-container transported through said scanning tunnel, and automatically producing PFNA images of said interior and/or contents; and

an information linking computer subsystem programmed for automatically linking (i) PFNA Images of the interior and/or contents of each said transported cargo-container produced by said PFNA scanning subsystem, with (ii) cargo-container identity information produced by said PLIIM-based subsystem, for storage within a relational database management system (RDBMS) for subsequent access and retrieval.

12. The PFNA based cargo-container scanning-tunnel system of claim 11, which further comprises a cargo-container dimensioning subsystem for automatically laser scanning the exterior of each said object transported through said scanning tunnel, and producing object dimension information on the dimensions of the scanned cargo-container.

13. The PFNA based cargo-container scanning-tunnel system of claim 12, wherein said cargo-container dimensioning subsystem and said PLIIM-based subsystem are integrated within a common system housing having first, second and third light transmission apertures linearly aligned with and optically isolated from each other, and said third light transmission aperture being disposed between said first and second light transmission apertures.

14. The PFNA based cargo-container scanning-tunnel system of claim 13, wherein said linear image formation and detection (IFD) module has an image formation optics with field of view projectable through said third light transmission aperture and onto said cargo-container moving relative to said first, second and third light transmission apertures during cargo-container illumination and imaging operations;

and each said planar laser illumination array (PLIA) including a plurality of laser diodes arranged together in a linear manner and said PLIAs being arranged in relation to said linear image formation and detection module, and for producing a pair of planar laser illumination beams (PLIBs), and projecting said pair of planar laser illumination beams (PLIBs), and projecting said pair of PLIBs through said first and second light transmission apertures and oriented such that the plane of said PLIBs is coplanar with the field of view of said linear image formation and detection module so that the cargo-container can be simultaneously illuminated by said PLIBs and imaged within said field of view of said linear image formation and detection module,

whereby a series of linear images of said cargo-container are sequentially detected by said linear image formation and detection module as said cargo-container moves past first, second and third light transmission apertures, so that said series of linear images can be grabbed and buffered for subsequent use in constructing two-dimensional images of said cargo-container.

15. The PFNA based cargo-container scanning-tunnel system of claim 14, wherein said PLIIM-based subsystem further comprises:

an image frame grabber for grabbing digital linear images formed and detected by said image formation and detection module,

an image data buffer for buffering said grabbed digital linear images for subsequent processing by said image processing computer; and

a camera control computer for controlling said linear image formation and said detection module, and said pair of planar laser illumination arrays.

16. The PFNA based cargo-container scanning-tunnel system of claim 14, wherein said image forming optics have a variable focal distance and a variable focal length providing a variable field of view.

17. The PFNA based cargo-container scanning-tunnel system of claim 13, wherein said linear image formation and detection (IFD) module has an image formation optics with a field of view projectable through said third light transmission aperture and onto said cargo-container moving relative to said first, second and third light transmission apertures during cargo-container illumination and imaging operations;

and each said planar light illumination array (PLIA) including a plurality of light emitting diodes (LEDs) arranged together in a linear manner and said PLIAs being arranged in relation to said linear image formation and detection module, and for producing a pair of planar light illumination beams (PLIBs), and projecting said pair of PLIBs through said first and second light transmission apertures and oriented such that the plane of said PLIBs is coplanar with the field of view of said linear image formation and detection module so that the cargo-container can be simultaneously illuminated by said PLIBs and imaged within said field of view of said linear image formation and detection module,

whereby a series of linear images of said cargo-container are sequentially detected by said linear image formation and detection module as said cargo-container moves past first, second and third light transmission apertures, so that said series of linear images can be grabbed and buffered for subsequent use in constructing two-dimensional images of said cargo-container.

18. The PFNA based cargo-container scanning-tunnel system of claim 17, wherein said PLIIM-based subsystem further comprises:

an image frame grabber for grabbing digital linear images formed and detected by said image formation and detection module,

an image data buffer for buffering said grabbed digital linear images for subsequent processing by said image processing computer; and

a camera control computer for controlling said linear image formation and said detection module, and said pair of planar light illumination arrays.

19. The PFNA based cargo-container scanning-tunnel system of claim 17, wherein said image forming optics have a variable focal distance and a variable focal length providing variable field of view.

20. The PFNA based object scanning-tunnel system of claim 11, wherein said information linking computer subsystem is integrated within said common system housing.

21. A pulsed fast neutron analysis (PFNA) based object scanning-tunnel system for automatically acquiring and linking object identity and attribute information about each object transported through said PFNA object scanning-tunnel system while bearing a bar code symbol and/or graphical indicia on the exterior surface thereof, said PFNA based object scanning-tunnel system, comprising:

a scanning-tunnel housing having an input port and an output port, through which one or more objects can be transported;

a object identification and dimensioning subsystem having a system housing mounted within said scanning-tunnel housing, and containing a planar light illumination and imaging (PLIIM) based object identification subsystem and a laser scanning object dimensioning subsystem;

said system housing having first, second, third and fourth light transmission apertures linearly aligned with and optically isolated from each other, and said third light transmission aperture being disposed between said first and second light transmission apertures;

said PLIIM-based object identification subsystem having

a linear image formation and detection (IFD) module having an image formation optics with a field of view projectable through said third light transmission aperture and onto said object moving relative to said first, second and third light transmission apertures during object illumination and imaging operations,

a pair of planar light illumination arrays (PLIAs) for producing a pair of planar light illumination beam (PLIB) far illuminating the exterior surface of each object and the bar code symbol thereon as said object is transported through said scanning tunnel,

wherein each said planar laser illumination array (PLIA) includes a plurality of laser diodes arranged together in a linear manner and said PLIAs being arranged in relation to said linear image formation and detection module, and for producing said pair of planar laser illumination beams (PLIBs), and projecting said pair of PLIBs through said first and second light transmission apertures and oriented such that the plane of said PLIBs is coplanar with the field of view of said linear image formation and detection module so that the object can be simultaneously illuminated by said PLIBs and imaged within said field of view of said linear image formation and detection module, whereby a series of linear images of said object sequentially detected by said linear image formation and detection module as said object moves past first, second and third light transmission apertures, so that said series of digital linear images can be grabbed and buffered for subsequent use in constructing two-dimensional images of said object, and

an image processing computer for buffering and processing said digital linear images of said object so to construct a 2-D image of the bar code symbol and/or graphical indicia on said object, and processing said 2-D image so as to read said bar code symbol, and identify said object by producing object identity information;

said laser scanning object dimensioning subsystem automatically laser scanning the exterior of each said object transported through said scanning tunnel, and producing object dimension information indicative of dimensional characteristics of the scanned object;

a PFNA scanning subsystem mounted within said scanning-tunnel housing, for producing a neutron energy beam for scanning the interior and/or contents of each object transported through said scanning tunnel, and automatically producing PFNA images of said interior and/or contents; and

an information linking computer subsystem programmed for automatically linking (i) object attribute information such as (1) PFNA images of the interior and/or contents of each said transported object produced by said PFNA scanning subsystem and (2) object dimension information produced by said laser scanning object dimensioning subsystem, with (ii) object identity information produced by said PLIIM-based object identification subsystem, for storage within a relational database management system (RDBMS) for subsequent access and retrieval.

22. The PFNA based object scanning-tunnel system of claim 21, wherein said object dimensioning subsystem comprises:

a first mechanism for producing and projecting a laser scanning beam through said fourth light transmission aperture and across the exterior surface of each said object transported past said fourth light transmission aperture; and

a second mechanism for collecting and processing laser light reflected/scattered off the exterior surface of said object so as to produce object dimension information.

23. The PFNA based object scanning-tunnel system of claim 22, wherein said information linking computer subsystem is integrated within said system housing.

24. The PFNA based object scanning-tunnel system of claim 21, wherein said PLIIM-based object identification subsystem further comprises:

an image frame grabber for grabbing digital linear images formed and detected by said image formation and detection module,

an image data buffer for buffering said grabbed digital linear images for subsequent processing by said image processing computer; and

a camera control computer for controlling said linear image formation and said detection module, and said pair of planar laser illumination arrays.

25. The PFNA based object scanning-tunnel system of claim 21, wherein said image forming optics have a variable focal distance and a variable focal length providing a variable field of view.