Environmentally-powered wireless sensor module

• US 8,508,193 B2
• Filed: 10/07/2009
• Issued: 08/13/2013
• Est. Priority Date: 10/08/2008
• Status: Active Grant

• Current Assignee: Sapurast Research LLC
• Original Assignee: Infinite Power Solutions, Inc. (Apple Inc.)
• Inventors: Keating, Joseph A., Bradow, Timothy N., Johnson, Raymond R., Narayan, Prativadi B.
• Primary Examiner(s): DIAO, M BAYE
• Application Number:
  US12/575,079
• Publication Number:
  US 20100090655A1
• Time in Patent Office: 1,406 Days
• Field of Search: 320/137, 257/254
• US Class Current: 320/137
• CPC Class Codes: G01D 21/00 Measuring or testing not otherwise provided for
• CPC Class Codes: H02J 50/001 Energy harvesting or scavenging
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00308 Overvoltage protection

Abstract

A system that powers a wireless sensor mechanism from ambient sources without the need to replace a battery is disclosed. The present invention uses an energy harvesting mechanism built onto, for example, a substrate to recharge a rechargeable energy storage mechanism that is built on the same substrate. The energy storage mechanism provides power to a transmission/receiving mechanism and microprocessor that may also be arranged on said substrate. The energy-harvesting mechanism may be combined with a power management unit to enable efficient use and regulation of the harvested energy.

Claims

1. An apparatus comprising:

a substrate having a first side surface and a second side surface;

an energy harvesting module on the second side surface of said substrate;

an energy storage device on the first side of said substrate opposite to the energy harvesting module on the second side surface of the substrate and connected to said energy-harvesting module through said substrate between the first and second side surfaces; and

a microprocessor located on the second side of said substrate opposite to the energy storage device on the first side surface of the substrate and connected to said energy storage device through said substrate between the first and second side surfaces,

wherein said first and second side surfaces oppose each other.

2. The apparatus of claim 1, further comprising a power management unit connected to said energy harvesting module.

3. The apparatus of claim 1, wherein said substrate comprises any device selected from the group of:

rigid substrate, semi-rigid substrate and flexible substrate.

4. The apparatus of claim 1, wherein said substrate comprises any material selected from the group of:

polyimide, polyester, polyethylene naphthalate, polyetherimide, aramid, and epoxy.

5. The apparatus of claim 1, further comprising at least one sensor connected to said microprocessor.

6. The apparatus of claim 1, further comprising at least one signal transmitter connected to said microprocessor.

7. The apparatus of claim 1, further comprising at least one signal receiver connected to said microprocessor.

8. The apparatus of claim 1, wherein said energy-harvesting module comprises any device selected from the group of:

piezoelectric transducer, radio-frequency transducer, solar cell, wind turbine, vibration energy scavenger, water movement-to-electric energy converter, rotational movement-to-electric energy converter, and temperature variation-to-electric energy converter.

9. The apparatus of claim 5, wherein said at least one sensor comprises any device selected from the group of:

an altimeter, a pressure gauge, a thermometer, a barometer, a hygrometer, an accelerometer, and an anemometer.

10. The apparatus of claim 1, wherein said energy storage device comprises any device selected from the group of:

battery, thin-film battery, capacitor, thin-film capacitor, magneto-electric element, piezoelectric element, thermal mass container, flywheel, micro-flywheel, micro electro-mechanical system (MEMS), mechanical spring, hydrogen generator with hydrogen container, and ozone generator with ozone container.

11. The apparatus of claim 1, further comprising an energy conversion component connected to the energy harvesting module.

12. The apparatus of claim 1, wherein said energy storage device comprises a thin-film battery with a total thickness that does not exceed 1 centimeter.

13. The apparatus of claim 12, wherein the lateral area of said thin-film battery does not exceed 10 square inches.

14. The apparatus of claim 12, wherein the lateral area of said thin-film battery does not exceed 0.25 square centimeters.

15. The apparatus of claim 12, wherein said thin-film battery contains a heat and pressure-resilient separation layer.

16. The apparatus of claim 12, wherein said thin-film battery contains a metallic lithium anode.

17. The apparatus of claim 12, wherein the electroactive element within said thin-film battery comprises lithium.

18. The apparatus of claim 12, wherein said thin-film battery comprises a lithium-ion cell.

19. The apparatus of claim 12, wherein said thin-film battery is a lithium-free battery.

20. The apparatus of claim 7, wherein said signal receiver receives a signal from a GPS satellite.

21. The apparatus of claim 7, wherein said signal receiver comprises a ZigBee transceiver.

22. A method for communicating information comprising:

converting energy into a useful form on a second side surface of a substrate;

storing said useful form of energy on a first side surface of the substrate by a connection through said substrate between the first and second side surfaces;

powering a processing unit on the second side surface of said substrate opposite to the energy storage device on the first side surface of the substrate with said stored energy on said first side surface of said substrate;

monitoring at least one parameter with at least one sensor on said second side surface of the substrate;

communicating the monitored parameter to said processing unit powered with said stored energy; and

processing said monitored parameter into user data,

wherein said first and second side surfaces oppose each other.

23. The method of claim 22 further comprising:

receiving GPS signals from one or more GPS satellites; and

determining the location of the device from said GPS signals.

24. An apparatus comprising:

an energy storage device;

a substrate having a first side surface positioned on the energy storage device;

an energy harvesting mechanism on a second side surface of said substrate and connected through said substrate between said first and second side surfaces to said energy storage device; and

a microprocessor located on said second surface of said substrate opposite to the energy storage device on the first side surface of the substrate and connected through said substrate between said first and second side surfaces to said energy storage device,

wherein said first and second side surfaces oppose each other.