Air sampler module for enhancing the detection capabilities of a chemical detection device or system

• US 20080007728A1
• Filed: 07/07/2006
• Published: 01/10/2008
• Est. Priority Date: 07/07/2006
• Status: Active Grant

• Current Assignee: Peraton, Inc.
• Original Assignee: ITT Manufacturing Enterprises, Inc. (ITT, Inc.)
• Inventors: Schneider, Thomas Wayne, Rezac, Jeromy, Jones, James Pendell, Shanna, Ratnesar-Shumate Ashni, Almassy, Robert, Randolph, Claudia, Armstrong, Wayne
• Granted Patent: US 7,511,809 B2
• Time in Patent Office: Days
• US Class Current: 356/301
• CPC Class Codes: G01N 1/2273 Atmospheric sampling
• CPC Class Codes: G01N 2001/022 sampling for security purposes, e.g. contraband, warfare agents
• CPC Class Codes: G01N 21/65 Raman scattering

Abstract

An air sampler module is provided for use with a detection device that monitors liquids and/or solids on a surface using spectroscopy techniques. The air sampler module comprises a housing, an intake port for collecting air containing airborne threats to be analyzed by the detection device, and a port to permit communication of an optical transceiver of the detection device into the housing to permit analysis of the collected air. Thus, the capabilities of a spectroscopy detection system are expanded to include the ability to analyze airborne threats.

Claims

1. An air sampler module for use with a detection device that monitors liquids and/or solids on a surface using spectroscopy techniques, the detection device comprising an optical transceiver, the air sampler module comprising a housing, an intake port for collecting air to be analyzed, a virtual impactor in said housing that sorts the air collected to produce a first flow primarily containing aerosol particles to be analyzed and a second flow primarily containing vapor to be analyzed and a port to permit communication of the optical transceiver of the detection device into said housing to permit analysis of said first and second flows.

2. The air sampler module of claim 1, and further comprising an aerosol concentrator coupled to the first flow that deposits solid and/or liquid aerosol particles onto a first surface for spectroscopy analysis with the use of the optical transceiver of the detection device.

3. The air sampler module of claim 2, and further comprising a vapor concentrator coupled to the second flow that concentrates vapor onto a second surface for spectroscopy analysis with the use of the optical transceiver of the detection device.

4. The air sampler module of claim 3, wherein the vapor collector comprises heating elements that heat the vapor in order to drive off concentrated vapor to allow for reuse of the second surface for a new sample.

5. The air sampler module of claim 3, wherein said second surface is cooled so that vapor condenses to produce liquid on it.

6. The air sampler module of claim 3, and further comprising at least one optical element in said housing that provides a first optical path between said optical transceiver to said first surface and a second optical path between said optical transceiver and said second surface.

7. The air sampler module of claim 6, wherein said at least one optical element is a mirror that is movable between a first position to create the first optical path and a second position to create the second optical path.

8. In combination, the air sampler module of claim 1, and a Raman detection device comprising the optical transceiver, wherein the optical transceiver is capable of being directed to a surface outside of said air sampler module to perform near-standoff or remote detection.

9. A spectroscopy detection system comprising:

a. an optical transceiver that emits a beam of light onto a surface and detects scattered light from the surface for spectroscopy analysis of substances on the surface; and

b. an air sampler module comprising a housing, an intake port for collecting air to be analyzed;

a virtual impactor in said housing that the air collected through the intake port to produce a first flow primarily containing aerosolized particles to be analyzed and a second flow primarily containing vapor to be analyzed and at least one port to permit communication of the optical transceiver into said housing to permit spectroscopy analysis of said first and second flows.

10. The system of claim 9, and further comprising at least one optical element that is capable of providing an optical path between said optical transceiver to a surface outside of said air sampler module to perform near-standoff or remote detection on the surface outside the air sampler module.

11. The system of claim 9, and wherein the air sampler module further comprises an aerosol concentrator coupled to the first flow that deposits solid and/or liquid aerosol particles onto a first surface for spectroscopy analysis with the use of the optical transceiver.

12. The system of claim 11, and further comprising a vapor concentrator coupled to the second flow that concentrates vapor from the second flow on a second surface for spectroscopy analysis with the use of the optical transceiver.

13. The system of claim 12, and further comprising at least one optical element in said housing that provides a first optical path between said optical transceiver to said first surface and a second optical path between said optical transceiver and said second surface.

14. The system of claim 9, wherein said optical transceiver emits a beam of Raman light and detects Raman scattered light.

15. The system of claim 9, wherein the air sampler module further comprises an exhaust port to exhaust air collected in the housing into the atmosphere after it has been analyzed.

16. A method for analyzing airborne and non-airborne threats using spectroscopy techniques, the method comprising:

a. collecting in a housing air to be analyzed;

b. sorting the air collected in the housing into a first flow containing aerosolized liquid and/or solid particles and a second flow containing vapor;

c. depositing the aerosolized liquid and/or solid particles onto a first surface in the housing and the vapor onto a second surface in the housing; and

d. optically coupling the optical transceiver to at least one of said first and second surfaces in the housing to permit spectroscopy analysis of said liquid and/or solid aerosol particles or of said vapor.

17. The method of claim 16, wherein and further comprising heating said vapor from the second flow and condensing liquid from the vapor onto said second surface.

18. The method of claim 16, wherein when analyzing aerosolized particles, said optically coupling comprises directing a beam of light from said optical transceiver to said first surface and directing scattered light from said first surface to said optical transceiver, and when analyzing vapor, said optically coupling comprises directing the beam of light from said optical transceiver to said second surface and directing scattered light from said second surface to said optical transceiver.

19. The method of claim 16, and further comprising creating an optical path between said optical transceiver and a surface outside of said housing to perform near-standoff or remote detection of solid and/or liquid substances on the surface outside of said housing.

20. A method for analyzing airborne and non-airborne threats using spectroscopy techniques, the method comprising:

a. collecting in a housing air to be analyzed;

b. depositing the airborne particles onto at least one surface inside said housing; and

c. optically coupling the optical transceiver to said at least a first surface in the housing to permit spectroscopy analysis of the particles deposited thereon; and

d. optically coupling the optical transceiver to a surface outside of the housing to permit spectroscopy analysis of particles on the surface outside of the housing.

21. The method of claim 20, and further comprising directing vapor from the air collected in the housing to a second surface in said housing, and wherein optically coupling further comprises optically coupling the optical transceiver to said second surface in the housing to permit spectroscopy analysis of the vapor on said second surface.

22. In combination, a detection device comprising an optical transceiver, and an air sampler module comprising a housing, an intake port for collecting air containing to be analyzed, and at least one port to permit communication of the optical transceiver of the detection device into said housing to permit analysis of said air, and further comprising at least one optical element that is capable of providing a first optical path between said optical transceiver of the detection device and a surface outside of said air sampler module to perform near-standoff or remote detection on the surface outside of the air sampler module and providing a second optical path between the optical transceiver and said port of said air sampler module to permit analysis of threats contained in the air collected in said housing.