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    Electric power generator for a projectile moving through the air
    1.
    发明授权
    Electric power generator for a projectile moving through the air 有权

    公开(公告)号：US12132421B1

    公开(公告)日：2024-10-29

    申请号：US17340154

    申请日：2021-06-07

    Applicant: Dmitriy Yavid ,  Mykola Rabchevskiy

    Inventor： Dmitriy Yavid ,  Mykola Rabchevskiy

    IPC: H02N2/18 ,  F42C11/00 ,  H02K35/02

    CPC classification number: H02N2/185 ,  H02K35/02 ,  H02N2/188 ,  F42C11/008

    Abstract: An electric power generator for a projectile moving through the air is based on vibrational, rather than rotational motion. The electric power generator uses an air stream through, which the projectile is traveling typically 100-250 m/s for mortars to up to 1,500 m/s for sabot or even higher electrically fired rounds. A typical 223 rifle round after being fired has energy of over 1700 J, which is equivalent to 1700 W seconds. If a Nano computer was able to extract energy of for example 50 nanowatts during bullet flight which rarely exceeds two seconds the power needed during the flight would be only a few parts per billion of the bullet's energy. Even allowing for very inefficient extraction of power, the necessary power to operate on onboard electronic devices such as computers and sensors can be extracted from the airstream through which the projectile travels.

    Micro ElectroMechanical System (MEMS) Energy Harvester With Residual Stress Induced Instability
    5.
    发明申请
    Micro ElectroMechanical System (MEMS) Energy Harvester With Residual Stress Induced Instability 审中-公开

    公开(公告)号：US20180316287A1

    公开(公告)日：2018-11-01

    申请号：US15769258

    申请日：2016-10-19

    Applicant: Massachusetts Institute of Technology

    Inventor： Ruize Xu ,  Sang-Gook Kim

    IPC: H02N2/18

    CPC classification number: H01L41/1134 ,  H02N2/188

    Abstract: Described embodiments provide a Micro-Electro-Mechanical System (MEMS) vibration energy harvester. The energy harvester includes a buckled multi-layer beam that includes a plurality of stacked layers. The plurality of stacked layers includes at least one piezoelectric layer. Each one of the plurality of stacked layers has a determined stress level and a determined thickness. The determined stress level includes at least a compressive stress. The plurality of stacked layers achieves a desired total stress level of the beam to achieve substantial deformation of the beam in at least one direction when a proof mass is added to the beam. In response to applied external vibrations having a vibration frequency and an acceleration amplitude, the beam deflects and deforms to provide strain to the at least one piezoelectric layer, thereby generating an electrical charge to provide a continuous power output in response to the external vibrations.

    Power generating device
    6.
    发明授权
    Power generating device 有权

    公开(公告)号：US10008961B2

    公开(公告)日：2018-06-26

    申请号：US15012981

    申请日：2016-02-02

    Applicant: National University Corporation Tohoku University ,  Murata Manufacturing Co., Ltd.

    Inventor： Kanjuro Makihara ,  Hitoshi Sakaguchi ,  Chikahiro Horiguchi

    IPC: H01L41/113 ,  H02N2/18

    CPC classification number: H02N2/181 ,  H01L41/1136 ,  H02N2/188

    Abstract: A power generating device is disclosed that includes a power generating unit, an inductor, a switch connected to the inductor in series, and a control circuit. The power generating unit includes a piezoelectric element, and upper and lower electrodes disposed on surfaces of the piezoelectric element. The inductor is electrically connected to the electrodes in parallel, with the inductor and a capacitance component constituting a resonance circuit. The control circuit has a driving mode in which it controls the switch to an ON state in synchronism with the voltage generated in the piezoelectric element becoming a peak value. Further, in a rest mode, the control circuit controls the switch to be in an OFF state when the voltage generated in the piezoelectric element has the peak value.

    VERY LOW POWER MICROELECTROMECHANICAL DEVICES FOR THE INTERNET OF EVERYTHING
    9.
    发明申请
    VERY LOW POWER MICROELECTROMECHANICAL DEVICES FOR THE INTERNET OF EVERYTHING 审中-公开

    公开(公告)号：US20170148592A1

    公开(公告)日：2017-05-25

    申请号：US15360508

    申请日：2016-11-23

    Applicant: University of Utah Research Foundation

    Inventor： Massood Tabib-Azir

    IPC: H01H35/00 ,  H01H57/00 ,  B81B3/00

    CPC classification number: H01H57/00 ,  G01P15/0802 ,  G01P2015/0828 ,  G01P2015/0831 ,  H01H59/0009 ,  H01H2057/006 ,  H01H2059/0072 ,  H01L41/1132 ,  H01L41/1136 ,  H02N2/186 ,  H02N2/188

    Abstract: A microelectromechanical device is disclosed and described. The microelectromechanical device can include a base having a raised support structure. The microelectromechanical device can also include a biasing electrode supported by the base. The microelectromechanical device can further include a displacement member supported by the raised support structure. The displacement member can have a movable portion extending from the raised support structure and spaced from the biasing electrode by a gap. The movable portion can be movable relative to the base by deflection of the displacement member. The displacement member can also have a piezoelectric material associated with the movable portion. In addition, the microelectromechanical device can include a voltage source electrically coupled to the piezoelectric material and the biasing electrode. The voltage source can apply a biasing voltage to the piezoelectric material and the biasing electrode to cause deflection of the displacement member toward the biasing electrode, thereby reducing the gap between the movable portion and the biasing electrode. Further deflection of the displacement member can cause an increase in voltage across the piezoelectric material and the biasing electrode sufficient to pull the movable portion into contact with the biasing electrode.

    DEVICE FOR GENERATING ELECTRICAL POWER FROM LOW FREQUENCY OSCILLATIONS
    10.
    发明申请
    DEVICE FOR GENERATING ELECTRICAL POWER FROM LOW FREQUENCY OSCILLATIONS 审中-公开

    公开(公告)号：US20170093267A1

    公开(公告)日：2017-03-30

    申请号：US15279063

    申请日：2016-09-28

    Applicant: NUH SADI YUKSEK ,  MAHMOUD ALMASRI

    Inventor： NUH SADI YUKSEK ,  MAHMOUD ALMASRI

    IPC: H02K35/04 ,  H02N1/08 ,  H02N2/18

    CPC classification number: H02K35/04 ,  H02K7/1876 ,  H02N1/08 ,  H02N2/188

    Abstract: An energy harvesting device for generating electrical power from low-frequency oscillations includes a high-frequency cantilever, a plurality of low-frequency cantilevers each configured to contact the high-frequency cantilever in response to environmental vibrations having a frequency within a near-resonance frequency range associated with said low-frequency cantilever, an a generator that produces electrical power in response to contact between at least one of the plurality of low-frequency cantilevers and the high-frequency cantilever. The energy harvesting device may also include an impact mass coupled to a free end of each of the plurality of low-frequency cantilevers. Some aspects may include a common base to which the high-frequency cantilever and the plurality of low-frequency cantilevers are coupled. Other aspects may include the generator comprising one or more of an induction coil and magnet, a variable distance capacitor, or a piezo-electric material.

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