Relocatable X-ray imaging system and method for inspecting vehicles and containers

• US 6,542,580 B1
• Filed: 01/15/2002
• Issued: 04/01/2003
• Est. Priority Date: 01/15/2002
• Status: Expired due to Term

• Current Assignee: Rapiscan Systems Incorporated (OSI Systems Incorporated)
• Original Assignee: Rapiscan Security Products USA Incorporated (OSI Systems Incorporated)
• Inventors: Carver, James M., Kotowski, Andreas F.
• Primary Examiner(s): Church, Craig E.
• Application Number:
  US10/052,916
• Time in Patent Office: 441 Days
• Field of Search: 378/57, 378/195-197
• US Class Current: 378/57
• CPC Class Codes: G01N 23/04 and forming images of the material
• CPC Class Codes: G01V 5/20 Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects

Abstract

A readily relocatable X-ray imaging system for inspecting the contents of vehicles and containers, and a method for using the same. In a preferred embodiment, the system is relatively small in size, and is used for inspecting containers and passenger vehicles, such as cars, SUVs, and small trucks, at a variety of sites. The X-ray inspection system includes a substantially rectangular frame having an X-ray imaging system disposed thereon. The frame is detachably connected to a conveyor mechanism having a minimal height, which allows drivers and passengers of vehicles to readily step off of and onto the conveyor mechanism without the aid of steps, railings, and the like. In a preferred configuration, the conveyor mechanism includes two detachable sections comprising a plurality of rollers, or other transport mechanism, having a radio-transparent plate or belt resting thereon for transporting a vehicle or container through the inspection area under the X-ray frame.

Claims

1. A relocatable security inspection system, comprising:

a substantially rectangular frame having first and second substantially vertical leg sections spaced apart from one another by a distance greater than a width of an object to be imaged, the space between the first and second leg sections defining an inspection area;

a conveyor mechanism connected to the frame for transporting the object through the inspection area, the conveyor mechanism configured to rest on a surface and having a height that permits a vehicle driver to readily step off of the conveyor mechanism onto the surface;

an X-ray source disposed on the frame for generating an X-ray beam along an outgoing path toward the object while the object moves through the inspection area;

a detector disposed on the frame in the outgoing path for receiving the X-ray beam after the X-ray beam passes through the object, and for producing an output signal representative of the object and of contents located inside the object;

an image processor for converting the output signal into a visual image of the object and of the contents located inside the object.

2. The system of claim 1 wherein the detector is disposed on at least one of the first and second leg sections.

3. The system of claim 1 wherein the frame includes a substantially horizontal base section connecting the first and second leg sections, the detector disposed on the base section.

4. The system of claim 1 wherein the frame includes a substantially horizontal X-ray generator section connecting the first and second leg sections, the X-ray source disposed on the X-ray generator section.

5. The system of claim 1 wherein the height of the conveyor mechanism is from one inch to two feet.

6. The system of claim 1 wherein the height of the conveyor mechanism is from five inches to seven inches.

7. The system of claim 1 wherein the conveyor mechanism comprises rollers having a platform resting thereon for supporting a vehicle, the platform movable along the rollers through the inspection area in two directions.

8. The system of claim 7 wherein the conveyor mechanism further comprises an activation mechanism for turning the rollers in the two directions.

9. The system of claim 1 wherein the conveyor mechanism comprises two sections connected to the frame on opposite sides of the frame, the two sections having substantially equal dimensions.

10. The system of claim 1 further comprising a raising mechanism disposed on the frame for raising the frame into an imaging position.

11. The system of claim 10 wherein the raising mechanism includes a drive gear for turning pulleys connected to the first and second leg sections, the pulleys configured to guide cables that raise the frame into the imaging position.

12. The system of claim 1 further comprising a vehicle for transporting the frame and the conveyor mechanism from one location to another.

13. The system of claim 1 further comprising a radiation shield adjacent to the frame for preventing radiation produced by the X-ray beam from escaping the inspection area.

14. The system of claim 1 wherein the first and second leg sections are extendable from a transport height to an imaging height.

15. A readily deployable security inspection system, comprising:

a substantially rectangular X-ray frame having first and second substantially vertical leg sections spaced apart from one another by a distance greater than a width of an object to be imaged, the space between the first and second leg sections defining an inspection area;

a first conveyor section detachably connected to the X-ray frame, the first conveyor section having a first transport mechanism disposed thereon for transporting the object into the inspection area, the first conveyor mechanism having a height that permits a vehicle driver to readily step from a vehicle located thereon onto the surface;

a second conveyor section detachably connected to the X-ray frame, the second conveyor section comprising a second transport mechanism disposed thereon for transporting the object out of the inspection area, the second conveyor section having a height that permits a vehicle driver to readily step off of the surface into a vehicle located thereon.

16. The system of claim 15 wherein the first transport mechanism comprises a first plurality of successively arranged rollers, and the second transport mechanism comprises a second plurality of successively arranged rollers.

17. The system of claim 16 further comprising a transport platform for supporting and transporting the object, the transport platform movable through the inspection area along the first and second plurality of rollers.

18. The system of claim 15 further comprising an X-ray source disposed on the X-ray frame for generating an X-ray beam along an outgoing path toward the object while the object moves through the inspection area.

19. The system of claim 18 wherein the X-ray frame includes a substantially horizontal X-ray generator section connecting the first and second leg sections, the X-ray source disposed on the X-ray generator section.

20. The system of claim 18 further comprising a detector disposed on the X-ray frame in the outgoing path for receiving the X-ray beam after the X-ray beam passes through the object, and for producing an output signal representative of the object and of contents located inside the object.

21. The system of claim 20 further comprising means for converting the output signal into a visual image of the object and of the contents located inside the object.

22. The system of claim 20 wherein the detector is disposed on at least one of the first and second leg sections.

23. The system of claim 20 wherein the X-ray frame includes a substantially horizontal base section connecting the first and second leg sections, the detector disposed on the base section.

24. The system of claim 15 wherein the height of each the first and second conveyor sections is from one inch to two feet.

25. The system of claim 15 wherein the height of each the first and second conveyor sections is from five inches to seven inches.

26. The system of claim 15 wherein the transport platform comprises a radio-transparent plate.

27. The system of claim 15 further comprising an activation mechanism for rotating the first and second plurality of rollers to move the transport platform in two directions.

28. The system of claim 15 further comprising a radiation shield adjacent to the X-ray frame for preventing radiation produced by the X-ray beam from escaping the inspection area.

29. The system of claim 15 wherein the first and second leg sections are extendable from a transport height to an imaging height.

30. The system of claim 15 further comprising a raising mechanism disposed on the X-ray frame for raising the X-ray frame into an imaging position.

31. The system of claim 30 wherein the raising mechanism includes a drive gear for turning pulleys connected to the first and second leg sections, the pulleys configured to guide cables that raise the X-ray frame into the imaging position.

32. A method of inspecting an object, comprising the steps of:

deploying a frame having an X-ray source disposed thereon onto a surface;

activating a drive mechanism disposed on the X-ray frame;

raising the frame on support rods into a substantially upright position via the drive mechanism, the frame defining an inspection area therein;

attaching a first conveyor section to a first side of the frame, such that the first conveyor section rests on the surface;

attaching a second conveyor section to a second side of the frame, such that the second conveyor section rests on the surface;

moving an object to be imaged onto the first conveyor section;

generating an X-ray beam from the X-ray source into the inspection area;

transporting the object from the first conveyor section to the second conveyor section such that the object passes through the inspection area wherein the object is penetrated by the X-ray beam;

detecting the X-ray beam after the X-ray beam penetrates the object.

33. The method of claim 32 further comprising the steps of:

producing an output signal representative of the object and of contents located inside the object after the X-ray beam is detected; and

converting the output signal into a visual image of the object and of the contents located inside the object for viewing by an operator.

34. The method of claim 32 further comprising the step of deploying a substantially flat transport platform onto the first conveyor section after the first conveyor section is attached to the frame, the transport platform configured for supporting and transporting the object.

35. The method of claim 34 wherein the step of moving the object onto the first conveyor section comprises moving the object onto the transport platform, and the step of transporting the object comprises moving the transport platform along a first plurality of rollers disposed on the first conveyor section onto a second plurality of rollers disposed on the second conveyor section.

36. The method of claim 35 further comprising the steps of:

moving the object off of the transport platform after the object passes through the inspection area; and

moving the transport platform along the second plurality of rollers onto the first plurality of rollers to receive a new object to be imaged.

37. The method of claim 32 further comprising the step of X-ray imaging the object at a plurality of energy levels such that visual images of metallic materials, organic materials, and inorganic materials located inside the object are readily distinguishable from one another.

38. A method of assembling an X-ray inspection system, the inspection system including a frame having first and second leg sections connected by an X-ray generator section, comprising the steps of:

deploying the frame onto a surface, the first and second leg sections each having a winch mechanism disposed thereon;

attaching a first stabilizing support to a first face of each of the first and second leg sections;

activating the winch mechanisms;

hoisting the frame up on support rods via the first and second winch mechanisms until the first stabilizing supports come to rest on the surface, such that the frame is in a substantially upright position;

attaching a second stabilizing support to a second face of each of the first and second leg sections.

39. The method of claim 38 further comprising the step of extending the first and second leg sections to a height that permits passenger vehicles to readily pass underneath the X-ray generator section of the frame, after the frame is hoisted into the substantially upright position.

40. The method of claim 38 wherein the frame includes a base section connecting the first and second leg sections, the method further comprising the step of attaching a first conveyor section to a first side of the base section, such that the first conveyor section rests on the surface adjacent to a first side of the frame.

41. The method of claim 40 further comprising the step of attaching a second conveyor section to a second side of the base section, such that the second conveyor section rests on the surface adjacent to a second side of the frame.

42. A method of assembling an X-ray inspection system, the inspection system including an X-ray frame having first and second leg sections connected by a X-ray generator section, comprising the steps of:

deploying the X-ray frame onto a surface such that a first face of each of the first and second leg sections faces substantially upward, a second face of each of the first and second leg sections faces substantially sideways and outward from the X-ray frame, and a third face of each of the first and second leg sections faces substantially downward against the surface, the first leg section having a first winch mechanism with a first cable disposed thereon and the second leg section having a second winch mechanism with a second cable disposed thereon;

attaching a first stabilizing support to the first face of first leg section, and a second stabilizing support to the first face of the second leg section;

sliding a first support rod through a support guide located on the second face of the first leg section, and a second support rod through a support guide located on the second face of the second leg section, such that a first end of each support rod engages the surface;

attaching a free end of the first cable to a second end of the first support rod, and a free end of the second cable to a second end of the second support rod;

activating the first and second winch mechanisms to hoist the X-ray frame up on the first and second support rods until the first and second stabilizing supports come to rest on the surface;

attaching a third stabilizing support to the third face of the first leg section, and a fourth stabilizing support to the third face of the second leg section;

activating the first and second winch mechanisms to lower the X-ray frame until the third and fourth stabilizing supports come to rest on the surface.

43. The method of claim 42 wherein the X-ray frame includes a base section connecting the first and second leg sections, the method further comprising the steps of attaching a first conveyor section to a first side of the base section, and a second conveyor section to a second side of the base section, such that the first and second conveyor sections rest on the surface.

44. The method of claim 42 further comprising the step of extending the first and second leg sections to a height that permits passenger vehicles to readily pass underneath the X-ray generator section of the X-ray frame, after the third and fourth stabilizing supports come to rest on the surface.