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公开(公告)号：US12104864B2
公开(公告)日：2024-10-01
申请号：US17975172
申请日：2022-10-27
发明人： Ziqi Yu , Taehwa Lee , Ercan Mehmet Dede , Masaki Nakaoka
CPC分类号： F28F13/18 , F28F2013/001 , F28F2245/06
摘要： A multi-mode heat transfer system includes an emitter device with an inner core surrounded by an outer core having an outer surface and an emission surface disposed on the outer surface. The emission surface includes a thermal metamaterial configured to direct heat from the inner core in at least two desired directions to an object other than the emitter device. The object can include a thermal receiver devices, for example two receiver devices and the emission surface can direct heat to two different receiver devices spaced apart from the emitter device.
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公开(公告)号：US12063009B1
公开(公告)日：2024-08-13
申请号：US18178213
申请日：2023-03-03
发明人： Ercan M. Dede , Ziqi Yu , Taehwa Lee , Shailesh Joshi
CPC分类号： H02S40/425 , H02S10/30
摘要： Thermophotovoltaic (TPV) systems for energy harvesting with thermal management are provided. The systems include a three-dimensional architected wick having a porous structure for delivering a two-phase working fluid via capillary action to maintain efficient cooling of a TPV cell array. The wick is configured to uniformly deliver working fluid for evaporative cooling of the TPV cells. The wick may be in direct thermal communication with the TPV cell or employed to locally deliver working fluid to an evaporator that is in direct thermal communication with the TPV cell. The increased surface area of porous structure of the wick and the evaporator increases heat dissipation and evaporative cooling providing an improvement in temperature distribution and heat transfer critical to maintaining the TPV cell at a constant temperature.
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公开(公告)号：US20240266975A1
公开(公告)日：2024-08-08
申请号：US18166224
申请日：2023-02-08
发明人： Taehwa Lee , Xiaopeng Li , Ziqi Yu , Yukihiro Tadokoro , Danil Prokhorov
CPC分类号： H02N2/186 , H02K7/1807 , H02N2/181
摘要： An energy harvesting system capable of using vibrational or mechanical energy to direct energy along a line to an energy receiver to transfer the vibrational energy. The energy harvesting system includes an energy transmitter capable of turning rotational or vibrational energy into a linear vibration that travels along the line to an energy receiver that takes the vibrational energy stored in the transverse wave and turns it into rotational motion. The rotational motion can then be used to drive an electric generator. A tension control unit provides tension to the line ensuring the amplitude of the transverse wave is at a maxima when it reaches the energy receiver.
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公开(公告)号：US20240264261A1
公开(公告)日：2024-08-08
申请号：US18166453
申请日：2023-02-08
发明人： Taehwa Lee , Xiaopeng Li , Ziqi Yu
CPC分类号： G01S3/8055 , H04R1/08
摘要： The direction of an acoustic wave can be determined using a single microphone. The single microphone can be operatively positioned within an interior of a resonator. The resonator can include a body that includes an aperture, such as a slit, which allows communication between the interior and an exterior of the resonator. The resonator can be configured to rotate. The single microphone can be configured to acquire sound data of an incident acoustic wave. One or more processors can be operatively connected to the single microphone. The one or more processors can be configured to determine a direction of the incident acoustic wave based on the acquired sound data.
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公开(公告)号：US20240142184A1
公开(公告)日：2024-05-02
申请号：US17975172
申请日：2022-10-27
发明人： Ziqi Yu , Taehwa Lee , Ercan Mehmet Dede , Masaki Nakaoka
IPC分类号： F28F13/18
CPC分类号： F28F13/18 , F28F2013/001 , F28F2245/06
摘要： A multi-mode heat transfer system includes an emitter device with an inner core surrounded by an outer core having an outer surface and an emission surface disposed on the outer surface. The emission surface includes a thermal metamaterial configured to direct heat from the inner core in at least two desired directions to an object other than the emitter device. The object can include a thermal receiver devices, for example two receiver devices and the emission surface can direct heat to two different receiver devices spaced apart from the emitter device.
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公开(公告)号：US20240105155A1
公开(公告)日：2024-03-28
申请号：US17951414
申请日：2022-09-23
发明人： Taehwa Lee , Xiaopeng Li , Ziqi Yu
IPC分类号： G10K11/172 , G10K11/16
CPC分类号： G10K11/172 , G10K11/161
摘要： A sound absorbing device includes a panel with an opening, a duct extending from the panel and in fluid communication with the opening, and a plurality of acoustic resonators embedded in the panel and in fluid communication with the duct. The duct can have a rectangular cuboid shape and the plurality of acoustic resonators can include a first subset of quarter-wavelength tubes extending from a first planar side of the duct, a second subset of quarter-wavelength tubes extending from a second planar side of the duct, a third subset of quarter-wavelength tubes extending from a third planar side of the duct, and a fourth subset of quarter-wavelength tubes extending from a fourth planar side of the duct. Also, the second subset of quarter-wavelength tubes and the fourth subset of quarter-wavelength tubes can have mirror symmetry with the first subset of quarter-wavelength tubes and the third subset of quarter-wavelength tubes, respectively.
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公开(公告)号：US11940417B2
公开(公告)日：2024-03-26
申请号：US17165390
申请日：2021-02-02
发明人： Xiaopeng Li , Taehwa Lee , Hideo Iizuka , Danil V. Prokhorov
CPC分类号： G01N29/07 , G01N29/11 , G06N3/08 , G01N2291/101
摘要： A flexural wave absorption system detects, with a sensor attached to a beam, an incident wave propagating in the beam. The system determines, based on a signal from the sensor generated in response to the incident wave, an amplitude and phase of the incident wave propagating in the beam and controls an actuator connected to the beam to generate a suppression wave, based on the amplitude and the phase of the incident wave, that reduces a coefficient of reflection of the incident wave across a broadband frequency range.
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8.发明授权公开(公告)号：US11681008B2
公开(公告)日：2023-06-20
申请号：US17379482
申请日：2021-07-19
发明人： Ziqi Yu , Xiaopeng Li , Taehwa Lee
CPC分类号： G01S3/8083 , H04R1/406 , H04R3/005
摘要： Systems and methods for virtually coupled resonators to determine an incidence angle of an acoustic wave are described herein. In one example, a system includes a processor and first and second transducers in communication with the processor. The first transducer produces a first signal in response to detecting an acoustic wave, while the second transducer produces a second signal in response to detecting the acoustic wave. The system may also include a memory in communication with the processor and having machine-readable instructions that cause the processor to modify the first signal and the second signal using a virtual resonator mapping function to generate a modified first signal and a modified second signal. The virtual resonator mapping function changes the first signal and the second signal to be representative of signals produced by transducers located within a hypothetical chamber of a hypothetical resonator.
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公开(公告)号：US20230073845A1
公开(公告)日：2023-03-09
申请号：US17976278
申请日：2022-10-28
发明人： Taehwa Lee , Hideo Iizuka
IPC分类号： G10K11/172 , G10K11/34
摘要： Systems for magnetoacoustically transferring sound across an acoustic barrier include first and second acoustic resonators positioned on opposite sides of the barrier. Each of the first and second resonators includes an attached magnet. Via magnetic coupling between the magnets, an acoustic oscillation at the first resonator induces an oscillation of the same frequency at the second resonator. Thus sound waves absorbed at the first resonator are magnetically transferred across the barrier to the second resonator, from which they are emitted.
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公开(公告)号：US20220285604A1
公开(公告)日：2022-09-08
申请号：US17193784
申请日：2021-03-05
发明人： Xiaopeng Li , Taehwa Lee , Hideo Iizuka
IPC分类号： H01L41/113 , H01L41/04 , G10K11/162 , G10K11/172
摘要： In one embodiment, a flexural wave absorption system includes a base member connected to a beam that may be subject to flexural waves, an arm member, connected to the base, disposed substantially in parallel alignment with the beam, a mass member connected to a distal end of the arm member, a piezoelectric patch, connected to the arm member, that generates electricity in response to a flexural wave propagating through the beam, and a shunting circuit, connected to the piezoelectric patch, that dissipates electricity generated by the piezoelectric patch to absorb the flexural wave.
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