Energy harvesting for wireless sensor operation and data transmission
First Claim
1. A device for powering a load from an ambient source of energy, comprising:
- an energy harvesting device for harvesting energy from the ambient source of energy, herein the rate energy is harvested from the ambient source of energy is below that required for directly powering the load;
a storage device connected to said energy harvesting device, wherein said storage device receives electrical energy from said energy harvesting device and wherein said storage device is for storing said electrical energy; and
a controller connected to said storage device for monitoring the amount of electrical energy stored in said storage device and for switchably connecting said storage device to the load when said stored energy exceeds a first threshold.
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Accused Products
Abstract
A device for powering a load from an ambient source of energy is provided. The device includes an energy harvesting device for harvesting energy from the ambient source of energy wherein the rate energy is harvested from the ambient source of energy is below that required for directly powering the load. A storage device is connected to the energy harvesting device. The storage device receives electrical energy from the energy harvesting device and is for storing the electrical energy. A controller is connected to the storage device is for monitoring the amount of electrical energy stored in the storage device and for switchably connecting the storage device to the load when the stored energy exceeds a first threshold. The system can be used for
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Citations
76 Claims
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1. A device for powering a load from an ambient source of energy, comprising:
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an energy harvesting device for harvesting energy from the ambient source of energy, herein the rate energy is harvested from the ambient source of energy is below that required for directly powering the load;
a storage device connected to said energy harvesting device, wherein said storage device receives electrical energy from said energy harvesting device and wherein said storage device is for storing said electrical energy; and
a controller connected to said storage device for monitoring the amount of electrical energy stored in said storage device and for switchably connecting said storage device to the load when said stored energy exceeds a first threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 70, 71, 72, 73, 74, 75)
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42. An energy harvesting system comprising:
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a piezoelectric transducer;
a rectifier;
a reactive device having a high impedance approximately matching impedance of said piezoelectric transducer at its operating frequency for efficiently transferring energy from said piezoelectric transducer to said reactive device;
a low impedance high capacity storage device;
a circuit for monitoring voltage across said reactive device, and for transferring said charge from said reactive device to said low impedance high capacity storage device when said voltage across said reactive device reaches a specified voltage value. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69)
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76. A device for sensing temperature or pressure in a tire comprising:
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a tire;
a PZT mounted on said tire;
a circuit for harvesting energy from said PZT, wherein said circuit comprises an element having an impedance approximately matching impedance of said PZT; and
a sensing module connected to said circuit, said sensing module including a sensor and a circuit for wirelessly transmitting sensor information.
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Specification