ENVIRONMENTAL SENSING AND COMMUNICATION

• US 20120179374A1
• Filed: 03/16/2012
• Published: 07/12/2012
• Est. Priority Date: 10/21/2008
• Status: Active Grant

• Current Assignee: Copeland Cold Chain LP
• Original Assignee: PakSense Incorporated (Emerson Electric Company)
• Inventors: Lawler, Casimir E. Jr., Hatchett, James, Debord, Wayne K., Jensen, Thomas P., Byce, Michael L.
• Granted Patent: US 8,494,773 B2
• Time in Patent Office: Days
• US Class Current: 702/2
• CPC Class Codes: G01D 21/00 Measuring or testing not otherwise provided for
• CPC Class Codes: G01D 9/007 Data loggers attached to transport containers for perishable products, e.g. food or medicines
• CPC Class Codes: G01K 1/022 for recording
• CPC Class Codes: G01K 1/024 for remote indication
• CPC Class Codes: G08C 17/02 using a radio link

Abstract

One apparatus embodiment includes an electronic assembly, equipped to sense one or more changes in an environmental condition. The assembly includes a logic circuit coupled to: one or more environmental sensors, memory that provides data storage, and a wireless communicator. The logic circuit is configured to perform time measurement, perform environmental measurement with the one or more environmental sensors, store time-stamped environmental data in the memory, and communicate with particular other electronic assemblies, equipped to sense one or more changes in an environmental condition, via the wireless communicator. The logic circuit is also coupled to a power source that provides power to at least one of the logic circuit and the wireless communicator.

Claims

1. An electronic assembly, comprising:

a wireless communicator; and

a logic circuit coupled to the wireless communicator, wherein the logic circuit is configured to;

communicate via the wireless communicator with particular other electronic assemblies equipped to sense one or more changes in an environmental condition; and

automatically acquire assembly identifiers of the particular other electronic assemblies, equipped to sense one or more changes in an environmental condition.

2. The assembly of claim 1, wherein the electronic assembly further includes one or more environmental sensors coupled to the logic circuit;

and

wherein the logic circuit is further configured to transmit an assembly identifier for the electronic assembly, equipped to sense one or more changes in an environmental condition, via the wireless communicator.

3. The assembly of claim 2, wherein the logic circuit is configured to communicate time-stamped environmental data with the particular other electronic assemblies, equipped to sense one or more changes in an environmental condition, and to a remote reader device via the wireless communicator.

4. The assembly of claim 3, wherein the logic circuit is configured to enter a sleep mode after communicating the time-stamped environmental data to the remote reader device.

5. The assembly of claim 2, wherein the logic circuit is configured to initiate an alarm status when a calculated alarm event occurs based upon the measured time and measured environmental data or received environmental data.

6. The assembly of claim 5, wherein the logic circuit is configured to communicate the alarm status to a remote reader device via the wireless communicator.

7. The assembly of claim 1, wherein the logic circuit is configured to:

receive time-stamped environmental data along with a different assembly identifier from each of the particular other electronic assemblies via the wireless communicator;

append an assembly group identifier to the different assembly identifiers; and

store the received time-stamped environmental data in a memory along with the appended different assembly identifiers.

8. The assembly of claim 1, wherein the assembly includes a protective cover at least partially surrounding the wireless communicator and the logic circuit.

9. The assembly of claim 8, wherein an adhesive graphic label is fitted over the protective cover.

10. The assembly of claim 1, wherein:

the assembly includes one or more light emitting diodes (LEDs) that, when illuminated, are visible from an exterior of the assembly; and

the assembly includes a pushbutton momentary switch configured to activate the assembly.

11. An environmental sensing and communication system, comprising:

a plurality of electronic assemblies, equipped to sense one or more changes in an environmental condition, each electronic assembly including a logic circuit coupled to one or more environmental sensors and a wireless communicator, wherein the logic circuit is encoded with an assembly identifier and configured to;

periodically transmit time-stamped environmental data via the wireless communicator along with the assembly identifier; and

determine a group to include those electronic assemblies, equipped to sense one or more changes in an environmental condition, from which transmissions are received for a period of time.

12. The system of claim 11, wherein:

a number of the plurality of electronic assemblies include memory; and

the logic circuit of each of the number of the plurality of electronic assemblies is configured to store time-stamped environmental data in the memory.

13. The system of claim 11, wherein one of the plurality of electronic assemblies in the group is assigned as a leader for the group.

14. The system of claim 13, wherein the logic circuit is configured to store, when assigned as the leader, time-stamped environmental data and the assembly identifiers received from each electronic assembly of the group in the memory.

15. The system of claim 14, wherein the logic circuit is configured to append a group identifier to the assembly identifiers received from each electronic assembly.

16. The system of claim 15, wherein:

the system includes a reader device, wherein the reader device is configured to transmit a download request signal and to wirelessly download data from the group of electronic assemblies; and

the logic circuit is configured to transmit, when assigned as the leader, the time-stamped environmental data along with the appended assembly identifiers from the memory to the reader device via the wireless communicator upon receipt of the download request signal.

17. The system of claim 16, wherein:

the system includes more than one group;

each group is located within a different shipping container within communication range of the reader device; and

the reader is configured to segregate the time-stamped environmental data for each group according to the appended assembly identifiers.

18. The system of claim 11, wherein the system includes a reader device including:

a wireless communicator to download data from the group of electronic assemblies; and

a physical communication port including a driver to transmit data.

19. A method of environmental sensing and communication, comprising:

collecting environmental data with a group of environmental sensing assemblies;

wirelessly communicating environmental sensing assembly identifiers and environmental data collected by the environmental sensing assemblies between the environmental sensing assemblies of the group; and

assigning one of the environmental sensing assemblies of the group as a leader for the group.

20. The method of claim 19, wherein the method includes storing the environmental data, collected by each environmental sensing assembly of the group, in memory of the leader.

21. The method of claim 20, wherein storing the environmental data in memory of the leader includes storing the environmental data along with a corresponding environmental sensing assembly identifier for each environmental sensing assembly of the group.

22. The method of claim 19, wherein assigning the leader includes assigning the leader by a method selected from the group including:

randomly assigning one of the environmental sensing assemblies as the leader;

assigning one of the environmental sensing assemblies as the leader based on which assembly identifier meets one or more particular criteria with respect to other assembly identifiers;

assigning one of the environmental sensing assemblies as the leader based on which environmental sensing assembly has been active for the greatest amount time; and

assigning one of the environmental sensing assemblies as the leader based on which environmental sensing assembly has been active for the least amount of time.

23. The method of claim 19, including wirelessly communicating the environmental data from the leader to a reader device.

24. An electronic assembly, comprising:

a wireless communicator;

a logic circuit coupled to the wireless communicator, wherein the logic circuit is configured to communicate with particular other electronic assemblies equipped to sense one or more changes in an environmental condition via the wireless communicator;

a power source that provides power to at least one of the logic circuit and the wireless communicator; and

a port for physical contact and electrical communication with a remote reader device, wherein the port is coupled to the power source to provide power from the remote reader device to the power source.

25. The assembly of claim 24, wherein the electronic assembly further includes one or more environmental sensors coupled to the logic circuit.

26. The assembly of claim 24, wherein the port is coupled to the logic circuit and configured to provide communication of time stamped environmental data from the memory to the remote reader device.