Cargo scanning system

• US 8,059,781 B2
• Filed: 08/02/2010
• Issued: 11/15/2011
• Est. Priority Date: 07/23/2002
• Status: Expired due to Fees

• Current Assignee: Rapiscan Systems Incorporated (OSI Systems Incorporated)
• Original Assignee: Rapiscan Systems Incorporated (OSI Systems Incorporated)
• Inventors: Agrawal, Neeraj, Kotowski, Andreas
• Primary Examiner(s): Kiknadze; Irakli
• Application Number:
  US12/848,977
• Publication Number:
  US 20110116597A1
• Time in Patent Office: 470 Days
• Field of Search: 378/57, 378/62, 378/102, 378/146, 378/148, 378/198
• US Class Current: 378/57
• CPC Class Codes: G01N 2223/639 material in a container
• 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
• CPC Class Codes: H05G 1/02 Constructional details

Abstract

The present invention is directed to a portable inspection system for generating an image representation of target objects using a radiation source. A detector array having a first configuration and a second configuration is connected to a housing and at least one source of radiation. The radiation source is capable of being transported to a site by a vehicle and of being positioned separate from the housing. The radiation source is housed in a radiation source box and movable within the radiation source box using an actuator. The actuator is operably connected to the radiation source and provides a translational energy that moves the radiation source between an operational position and a stowed position.

Claims

1. A portable inspection system for inspecting a vehicle and generating an image representation of contents within said vehicle, comprising:

a. a radiation source;

b. a moveable boom containing detectors; and

c. software that, when executed by at least one processor;

i. initiates image generation;

ii. calibrates at least one of said detectors wherein said calibration occurs when the vehicle is not present between the radiation source and the at least one of said detectors being calibrated;

iii. stores a radiation baseline based upon said calibration;

iv. measures photo integration levels of each of said detectors wherein said measurement occurs when the vehicle is present between the radiation source and the detectors being measured; and

v. stores the measured photo integration levels.

2. The portable inspection system of claim 1 wherein the radiation source is a dual energy radiation source.

3. The portable inspection system of claim 2 wherein the detectors are calibrated for two different energies.

4. The portable inspection system of claim 1 wherein the image generation is caused by movement of a trailer containing the boom.

5. The portable inspection system of claim 1 wherein the image generation is caused by sensors detecting a presence of a vehicle to be inspected by the portable inspection system.

6. The portable inspection system of claim 1 wherein the radiation baseline corresponds to a photo current integration level.

7. The portable inspection system of claim 6 wherein at least three photo current integration levels are obtained for each detector.

8. The portable inspection system of claim 1 wherein the software further determines if all of the detectors have been queried for a photo current integration level.

9. A portable inspection system for inspecting a vehicle and generating an image representation of contents within said vehicle, comprising:

a. a dual energy radiation source;

b. a moveable boom containing detectors; and

c. software that, when executed by at least one processor;

i. initiates image generation;

ii. using a first energy level of the dual energy radiation source, calibrates at least one of said detectors wherein said calibration occurs when the vehicle is not present between the radiation source and the at least one of said detectors being calibrated;

iii. stores a radiation baseline based upon said calibration;

iv. using the first energy level of the dual energy radiation source, measures photo integration levels of each of said detectors wherein said measurement occurs when the vehicle is present between the radiation source and the detectors being measured; and

v. stores the measured photo integration levels.

10. The portable inspection system of claim 9 wherein the image generation is caused by movement of a trailer containing the boom.

11. The portable inspection system of claim 10 wherein the image generation is caused by sensors detecting a presence of a vehicle to be inspected by the portable inspection system.

12. The portable inspection system of claim 10 wherein the radiation baseline corresponds to a photo current integration level.

13. The portable inspection system of claim 12 wherein at least three photo current integration levels are obtained for each detector.

14. The portable inspection system of claim 10 wherein the software further determines if all of the detectors have been queried for a photo current integration level.

15. The portable inspection system of claim 10 wherein the software, when executed by the at least one processor,

i. using a second energy level of the dual energy radiation source, calibrates at least one of said detectors wherein said calibration occurs when the vehicle is not present between the radiation source and the at least one of said detectors being calibrated;

ii. stores a radiation baseline based upon said calibration;

iii. using the second energy level of the dual energy radiation source, measures photo integration levels of each of said detectors wherein said measurement occurs when the vehicle is present between the radiation source and the detectors being measured; and

iv. stores the measured photo integration levels.

16. The portable inspection system of claim 15 wherein the image generation is caused by movement of a trailer containing the boom.

17. The portable inspection system of claim 15 wherein the image generation is caused by sensors detecting a presence of a vehicle to be inspected by the portable inspection system.

18. The portable inspection system of claim 15 wherein the radiation baseline corresponds to a photo current integration level.

19. The portable inspection system of claim 18 wherein at least three photo current integration levels are obtained for each detector.

20. The portable inspection system of claim 15 wherein the software further determines if all of the detectors have been queried for a photo current integration level.