Distributed biohazard surveillance system and apparatus for adaptive aerosol collection and synchronized particulate sampling

• US 7,082,369 B1
• Filed: 05/20/2004
• Issued: 07/25/2006
• Est. Priority Date: 05/19/2004
• Status: Expired due to Fees

• Current Assignee: the united states of america as represented by the secretary of the navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Chen, Shu-Ching, Rubin, Stuart H.
• Primary Examiner(s): McElheny, Jr., Donald
• Application Number:
  US10/850,004
• Time in Patent Office: 796 Days
• Field of Search: 702/2, 702/3, 702/19, 702/22, 702/24, 702/23, 702/25, 702/26, 702/49, 96/63, 738/630.1, 738/632.3
• US Class Current: 702/19
• CPC Class Codes: G01N 15/1433 using image recognition
• CPC Class Codes: G01N 2001/2223 aerosol sampling devices
• CPC Class Codes: G01N 2015/019 Biological contaminants; Fouling
• CPC Class Codes: G01N 2021/1793 Remote sensing
• CPC Class Codes: G01N 21/05 Flow-through cuvettes G01N21/09 takes precedence; handling fluid samples G01N1/10
• CPC Class Codes: G01N 21/33 using ultraviolet light G01N21/39 takes precedence
• CPC Class Codes: G01N 21/94 Investigating contamination, e.g. dust G01N21/85 takes precedence
• CPC Class Codes: G01N 2201/0696 Pulsed
• CPC Class Codes: G01N 2201/1296 using neural networks

Abstract

A distributed biohazard surveillance system including a plurality of robust miniaturized remote monitoring stations for the detection, localized analysis and reporting of a broad range of biohazards. The remote monitoring station may be adapted to identify many different biological particles and is not limited to particular predetermined biohazard profiles. It is centrally and dynamically reconfigurable and can be adapted to operate unattended in a remote location. The distributed system may be used to locate and report unsuspected sources of biohazards and to monitor the localized effects in real-time cooperation with a centralized data processing facility.

Claims

1. A distributed biological hazard surveillance system comprising:

a central processing assembly including means for receiving and transmitting data; and

a plurality of detector assemblies disposed throughout a physical region under surveillance for capturing and identifying an airborne particle, each detector assembly including;

an intake filter assembly disposed to accept a flow of air containing an airborne particle from the exterior of the detector assembly;

a sampling chamber disposed to accept the flow of air and the airborne particle from the filter assembly;

a fan disposed to move the air flow and the airborne particle through the intake filter assembly and across the sampling chamber;

an optical stage disposed within the sampling chamber, including

an electrostatic precipitator disposed to induce in the airborne particle an electrostatic charge sufficient to facilitate capture of the charged airborne particle,

an optical assembly disposed to magnify the image of the captured particle,

a flash optical source disposed to illuminate the optical stage with an optical pulse,

a digital camera disposed to capture the magnified image of the captured particle during the optical pulse, and

a synchronizing controller coupled to the electrostatic precipitator for coordinating electrostatic precipitator operation with the operation of the digital camera and flash optical source to capture the charged airborne particle in a vortex and to obtain the magnified image thereof;

a processor including memory and processing means together with controlling and processing software for controlling the optical stage, for storing digital image data produced by the digital camera, for analyzing the digital image data to produce analysis data, and for processing and storing the analysis data; and

a transmitter coupled to the processor for transmitting the analysis data to the central assembly.

2. The system of claim 1 further comprising:

an optical stage examination surface disposed within the optical stage to capture the charged airborne particle.

3. The system of claim 2 further comprising:

charge reversing means coupled to the electrostatic precipitator for inducing in the captured particle an electrostatic charge sufficient to repel the captured particle from the optical stage examination surface.

4. The system of claim 1 further comprising:

a neural network disposed to accept the digital image data and to produce the analysis data representing an identification of the captured particle.

5. The system of claim 4 further comprising:

a receiver coupled to the processor for receiving data representing a plurality of neural network weights.

6. The system of claim 1 further comprising:

in the central processing assembly, a graphical user interface (GUI) disposed to accept instructions from a system user.

7. The system of claim 6 further comprising:

a separate telemetric module disposed in communication with the central processing assembly to transmit data representing appropriate warnings of imminent threat to the physical region under surveillance, responsive to the analysis data.

8. The system of claim 1 further comprising:

a separate telemetric module disposed in communication with the central processing assembly to transmit data representing appropriate warnings of imminent threat to the physical region under surveillance, responsive to the analysis data.

9. In a distributed biological hazard surveillance system including a central processing assembly including means for receiving and transmitting data to a plurality of such detector assemblies disposed throughout a physical region under surveillance, a detector assembly for capturing and identifying an airborne particle, the detector assembly comprising:

an intake filter assembly disposed to accept a flow of air containing an airborne particle from the exterior of the detector assembly;

a sampling chamber disposed to accept the flow of air and the airborne particle from the filter assembly;

a fan disposed to move the air flow and the airborne particle through the intake filter assembly and across the sampling chamber;

an optical stage disposed within the sampling chamber, including

an electrostatic precipitator disposed to induce in the airborne particle an electrostatic charge sufficient to facilitate capture of the charged airborne particle,

an optical assembly disposed to magnify the image of the captured airborne particle,

a flash optical source disposed to illuminate the optical stage with an optical pulse,

a digital camera disposed to capture the magnified image of the captured airborne particle during the optical pulse, and

a synchronizing controller coupled to the electrostatic precipitator for coordinating electrostatic precipitator operation with the operation of the digital camera and flash optical source to capture the charged airborne particle in a vortex before capturing the magnified image;

a processor including memory and processing means together with controlling and processing software for controlling the optical stage, for storing digital image data produced by the digital camera, for analyzing the digital image data to produce analysis data, and for processing and storing the analysis data; and

a transmitter coupled to the processor for transmitting the analysis data to the central processing assembly.

10. The assembly of claim 9 further comprising:

an optical stage examination surface disposed within the optical stage to capture the charged airborne particle.

11. The assembly of claim 10 further comprising:

charge reversing means coupled to the electrostatic precipitator for inducing in the captured particle an electrostatic charge sufficient to repel the captured particle from the optical stage examination surface.

12. The system of claim 9 further comprising:

a neural network disposed to accept the digital image data and to produce the analysis data representing an identification of the captured particle.

13. The system of claim 9 further comprising:

a separate telemetric module disposed in communication with the central processing assembly to transmit data representing appropriate warnings of imminent threat to the physical region under surveillance, responsive to the analysis data.