Autonomous monitoring method and system using sensors of different sensitivities

• US 8,285,493 B2
• Filed: 07/25/2011
• Issued: 10/09/2012
• Est. Priority Date: 04/22/2004
• Status: Active Grant

• Current Assignee: Smiths Detection (Smiths Group International Holdings Ltd.)
• Original Assignee: Smiths Detection (Smiths Group International Holdings Ltd.)
• Inventors: Sunshine, Steven A., Burch, Timothy E., Steinthal, Gregory, Plotkin, Neil, Hsiung, Chang-Meng
• Primary Examiner(s): Bui, Bryan
• Application Number:
  US13/190,123
• Publication Number:
  US 20110320136A1
• Time in Patent Office: 442 Days
• Field of Search: 702/32, 702/183, 702/188, 340/506, 340/516, 340/517
• US Class Current: 702/32
• CPC Class Codes: G01N 33/0032 using two or more different physical functioning modes
• CPC Class Codes: G01N 33/0075 for multiple spatially distributed sensors, e.g. for environmental monitoring transmission systems for measured values G08C
• CPC Class Codes: G16B 99/00 Subject matter not provided for in other groups of this subclass

Abstract

A method and system of monitoring for chemical or other toxic agents includes operating a plurality of first type sensors having a first level of sensitivity to an agent in a monitored area. Concurrently a second type sensor is operated having a second level of sensitivity to the agent in the monitored area, where the second level of sensitivity is at least ten times more sensitive than the first level of sensitivity. Input from the plurality of first type sensors and the second type sensor is received and analyzed, at a central location, in order to determine the presence of the agent in the monitored area.

Claims

1. A system for monitoring an area of interest for an agent, the system comprising:

a plurality of sensor nodes of different types configured to generate sensor data; and

a central analysis unit configured to;

wirelessly communicate in a mesh network with the plurality of sensor nodes to monitor an area for an agent,

generate alarm data, and

communicate with a central location via an other network to communicate the alarm data and the sensor data to the central location that is remote from the central analysis unit.

2. The system of claim 1, wherein at least one of said sensor nodes comprises a communication module that is a separate part of the sensor node from a part that includes a sensor.

3. The system of claim 1, wherein at least one of said sensor nodes comprises a weather node.

4. The system of claim 1, wherein the central location is configured to communicate at least a portion of the alarm data and sensor data to a hand-held computing system.

5. The system of claim 1, wherein at least one of said sensors is configured to detect the agent at an immediately dangerous to life or health level and an other of said sensors is configured to detect the agent at a permissible exposure limit level.

6. The system of claim 1, wherein one of said sensor nodes comprises a hand held type sensor.

7. The system of claim 1, wherein the central analysis unit is configured to display system health information.

8. The system of claim 1, wherein the other network comprises the Internet.

9. The system of claim 1, wherein sensor nodes are not co-located with a sensor node of a different type.

10. The system of claim 1, wherein the central analysis unit is configured to determine the presence of the agent in the monitored area based on sensor data from a plurality of said sensor nodes of one type and sensor data from one said sensor node of a different type.

11. The system of claim 1, wherein the central analysis unit includes an algorithm to analyze sensor data associated with one of said sensor nodes that alarmed.

12. The system of claim 1, wherein the central analysis unit is further configured to calibrate at least one of said sensor nodes when field deployed.

13. A method comprising:

receiving sensor data that is multidimensional over a mesh network from sensor nodes, wherein at least one of the sensor nodes includes a communication module that is a separate part of the sensor node from a part that includes a sensor;

receiving alarm data that indicates an agent'"'"'s presence in an area being monitored by the sensor nodes;

interpreting sensor data from more than one of the sensor nodes by a central analysis unit responsive to receipt of the alarm data;

communicating an alarm based on said interpreted sensor data to a central location via an other network to notify a plurality of computing systems of the alarm.

14. The method of claim 13, further comprising receiving raw sensor data from a sensor node that communicated the alarm data responsive to receipt of the alarm data.

15. The method of claim 14, wherein communication of raw sensor data is driven responsive to detection of an event.

16. The method of claim 13, wherein the sensor data comprises data from two types of sensors.

17. The method of claim 16, wherein the two types of sensors comprise one sensor that has a greater sensitivity to the agent than an other type of sensor.

18. One or more non-transitory computer readable media comprising instructions that, when executed by a computing system, cause the computing system to:

control node function of a plurality of sensor nodes of different types that, respectively, are configured to alarm based on an algorithm that is usable to identify an agent'"'"'s presence by pattern matching sensor data with a library;

alarm based on at least one of (i) an alarm received from one of said sensor nodes, and (ii) identification of the agent by the computing system based on sensor data received from one of said sensor nodes; and

communicate the alarm via a network that is different from a network used to communicate with said sensor nodes to hand-held computing systems to notify the hand-held computing systems of said alarm'"'"'s existence.

19. The one or more non-transitory computer readable media of claim 18, wherein the instructions further comprise instructions that, when executed by the computing system, cause the computing system to calibrate the sensor nodes wirelessly over said network used to communicate with said sensor nodes.

20. The one or more non-transitory computer readable media of claim 18, wherein the instructions further comprise instructions that, when executed by the computing system, cause the computing system to identify the agent'"'"'s presence based on sensor data from two different types of sensors.