Energy harvester and wireless sensor device having energy harvester
First Claim
1. A wireless sensor device comprising:
- an energy harvester configured to convert vibration generated from a broadband vibration source into electricity;
an elastic member arranged to receive the vibration and connected to the energy harvester; and
a communication unit fixed by the elastic member, supplied with the converted electricity from the energy harvester, and configured to transmit sensing information obtained by sensing a measurement target,wherein the elastic member operates as a mechanical filter configured to limit a frequency range and an acceleration magnitude of the vibration to be transferred to the communication unit for stabilizing the performance of the communication unit, and the communication unit is arranged to receive vibration passing through the elastic member.
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Abstract
A wireless sensor device includes: an energy harvester configured to convert vibration generated from a broadband vibration source into electricity, an elastic member arranged to receive the vibration and a communication unit fixed by the elastic member, supplied with the converted electricity from the energy harvester, and configured to transmit sensing information obtained by sensing a measurement target. The elastic member operates as a mechanical filter configured to limit a frequency range and an acceleration magnitude of the vibration to be transferred to the communication unit for stabilizing the performance of the communication unit, and the communication unit is arranged to receive vibration passing through the elastic member.
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Citations
11 Claims
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1. A wireless sensor device comprising:
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an energy harvester configured to convert vibration generated from a broadband vibration source into electricity; an elastic member arranged to receive the vibration and connected to the energy harvester; and a communication unit fixed by the elastic member, supplied with the converted electricity from the energy harvester, and configured to transmit sensing information obtained by sensing a measurement target, wherein the elastic member operates as a mechanical filter configured to limit a frequency range and an acceleration magnitude of the vibration to be transferred to the communication unit for stabilizing the performance of the communication unit, and the communication unit is arranged to receive vibration passing through the elastic member. - View Dependent Claims (2, 3, 4)
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5. An energy harvester configured to convert vibration into electricity, comprising:
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a first elastic part configured to vibrate in response to vibration having a first vibration frequency as a center frequency; a first mass part combined with the first elastic part; a first magnetic body combined with the first mass part; a second elastic part configured to vibrate in response to vibration having a second vibration frequency as a center frequency; a second mass part combined with the second elastic part; a second magnetic body combined with the second mass part; a central shaft combined with the first elastic part, the second elastic part, the first mass part, the second mass part, the first magnetic body, and the second magnetic body; and a coil part which is arranged along the central shaft and into which the first magnetic body or the second magnetic body is inserted in response to vibration of the first elastic part or the second elastic part, respectively. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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Specification