Self-contained, portable inspection system and method

• US 6,843,599 B2
• Filed: 07/23/2002
• Issued: 01/18/2005
• Est. Priority Date: 07/23/2002
• Status: Expired due to Fees

• Current Assignee: Rapiscan Systems Incorporated (OSI Systems Incorporated)
• Original Assignee: Rapiscan, Inc.
• Inventors: Le, Khai, Kotowski, Andreas F.
• Primary Examiner(s): Church, Craig E.
• Assistant Examiner(s): Kiknadze, Irakli
• Application Number:
  US10/201,543
• Publication Number:
  US 20040017887A1
• Time in Patent Office: 910 Days
• Field of Search: 378/198, 378/102, 378/197, 378/57, 378/58, 378/60, 250/358.1, 250/360.1
• US Class Current: 378/198
• CPC Class Codes: G01V 5/20 Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects

Abstract

The inspection methods and systems of the present invention are mobile, deployable, and capable of scanning a wide variety of receptacles cost-effectively and accurately on uneven surfaces. The inspection system comprises an inspection module that, in a preferred embodiment, is in the form of a mobile trailer capable of being towed and transported to its intended operating site with the help of a tug-vehicle. The tug-vehicle preferably includes at least one source of electromagnetic radiation, a hydraulic lift system to load and unload the radiation source, and at least one radiation shield plate positioned on the back of the driver cabin of the tug-vehicle.

Claims

1. A portable inspection system for generating an image representation of target objects using a radiation source, comprising:

a mobile vehicle;

a housing connected to the vehicle;

a detector array having a first configuration and a second configuration wherein said array is connected to the housing; and

at least one source of radiation wherein said radiation source is capable of being transported to a site by said vehicle and of being positioned separate from the housing

wherein said image is generated by introducing the target objects in between the radiation source and the detector array, exposing said objects to radiation, and detecting radiation.

2. The system of claim 1 wherein the mobile vehicle is a tow vehicle and the housing is a trailer attached to said vehicle.

3. The system of claim 2 wherein the mobile vehicle detaches from the housing.

4. The system of claim 3 further comprising a hydraulic system located in the vehicle to position the radiation source for inspection.

5. The system of claim 3 wherein the mobile vehicle is capable of transporting said target objects in between the radiation source and the detector array.

6. The system of claim 1 further comprising at least one sensor to determine when a target object is positioned between the radiation source and the detector array.

7. The system of claim 6 wherein the sensor, upon being activated by the movement of a target object, transmits a signal to activate said radiation source.

8. The system of claim 1 wherein the mobile vehicle and housing are integrated into a single moving vehicle structure.

9. The system of claim 1 wherein the housing has a base, the first configuration of the detector array extends substantially parallel to said to permit the housing to be transported safely on roadways, and the second configuration of the detector array extends substantially orthogonal to said base.

10. The system of claim 1 wherein the first configuration of the detector array is folded to permit the housing to be transported safely on roadways and the second configuration of the detector array is unfolded to permit detection of radiation.

11. The system of claim 10 wherein the detector array comprises at least two detector panels.

12. The system of claim 11 wherein the second configuration of the detector array comprises a first exposed detector panel, a second exposed detector panel, and a third exposed detector panel.

13. The system of claim 10 further comprising a detector array positioning system capable of moving the detector array from the first configuration to the second configuration.

14. The system of claim 1 wherein the radiation source can be collimated through an adjustable collimator.

15. The system of claim 14 wherein the adjustable collimator has a long snout.

16. The system of claim 1 wherein the radiation source is aligned with the detector system.

17. The system of claim 16 wherein the radiation source is aligned with the detector system using optical triangulation techniques.

18. The system of claim 16 wherein the radiation source is aligned with the detector system using feedback techniques.

19. The system of claim 1 wherein the plane of the detector arrays is skewed with respect to the proximal side of the housing.

20. A method for inspecting objects using a portable inspection system that generates an image representation of a target object using a radiation source, comprising the steps of:

transporting at least one source of radiation to an operation site using a vehicle;

transporting a detector array to an operation site using a trailer wherein the vehicle is attached to the trailer;

detaching the vehicle from the trailer;

deploying the radiation source from the vehicle, said vehicle having a base, by positioning the radiation source separate from the detector array;

deploying the detector array to expose a plurality of detector panels to the radiation source wherein the detector array and radiation source define an inspection space;

towing the target object into the inspection space;

exposing the target object to radiation emitted from the radiation source wherein the exposing step results in secondary radiation; and

detecting secondary radiation by the detector array.

21. The method of claim 20 wherein the target object can be towed so that the target object is in motion relative to the deployed radiation source and deployed detector system.

22. The method of claim 21 wherein the motion of the target object is substantially constant.

23. The method of claim 20 wherein the vehicle comprises a hydraulic system located in the vehicle to position the radiation source for inspection.

24. The method of claim 20 further comprising the step of detecting when the target object enters the inspection space.

25. The method of claim 20 wherein the detector array is deployed into a second configuration from a first configuration, wherein the first configuration of the detector array is folded to permit the housing to be transported safely on roadways and the second configuration of the detector array is unfolded to permit detection of radiation and comprises a first exposed detector panel, a second exposed detector panel, and a third exposed detector panel.

26. The method of claim 20 wherein the detector array is deployed into a second configuration from a first configuration, wherein the first configuration of the detector array is substantially parallel to the base of the vehicle and the second configuration of the detector array is substantially orthogonal to the base of the vehicle.

27. The method of claim 20 wherein the plane of the detector arrays is skewed with respect to the proximal side of the trailer.