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公开(公告)号：US20240182168A1
公开(公告)日：2024-06-06
申请号：US18279417
申请日：2021-03-03
发明人： Masato MARUYAMA , Jun KATO , Toshihisa MASUDA , Naomichi Nakamura
摘要： A lightning induction system includes a plurality of flight vehicles 3 that fly between a lightning originating point 1 in the sky where lightning is generated and a ground surface 2. The flight vehicles 3 each include: a flight unit 10 that generates lift force and propulsion force; a conductor cable 20 that is engaged with the flight unit 10, extends downward, and has a predetermined length; and a weight unit 30 connected to the lower end of the conductor cable 20. The flight unit 10 is disposed in a Faraday cage 11. The Faraday cage 11 has a sphere shape, and the flight unit 10 is fixed by a support pillar 12 extending downward from the inner side of the top of the sphere.
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公开(公告)号：US20220057442A1
公开(公告)日：2022-02-24
申请号：US17415345
申请日：2019-12-26
发明人： Naruto ARAI , Ken OKAMOTO , Jun KATO
摘要： To easily measure a voltage to ground of electromagnetic interference waves generated on a cable. A capacitance-to-ground measurement mechanism 10 includes a first electrode 11 and a second electrode 12 positioned at equal altitudes to be opposed to the earth, and a first voltage measurement device 15 to measure a voltage generated in a first resistance 14 connected between the first electrode 11 and the second electrode 12 by an output signal from an oscillation circuit 13. A voltage-to-ground measurement mechanism 30 includes a GND electrode 31 positioned at an altitude equal to that of the first electrode 11 and the second electrode 12 to be opposed to the earth, and a second voltage measurement device 33 to measure a voltage generated in a second resistance 32 connected between the GND electrode 31 and a probe 34 that is brought into contact with a cable core 106 as a measurement target. A computation mechanism 50 includes a computation device 51 to calculate a voltage to ground of electromagnetic interference waves generated on a cable based on data of respective voltages measured by the capacitance-to-ground measurement mechanism 10 and the voltage-to-ground measurement mechanism 30.
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公开(公告)号：US20210239739A1
公开(公告)日：2021-08-05
申请号：US17270386
申请日：2019-08-23
发明人： Naruto ARAI , Ken OKAMOTO , Jun KATO
摘要： A common-mode voltage measurement apparatus according to an embodiment includes a measurement electrode attached to a conductor capable of being brought into contact with a coated cable, a measurement circuit configured to measure a common-mode voltage generated in the cable, and a compensation circuit connected in series between the measurement electrode and the measurement circuit, the compensation circuit being configured to compensate for a parasitic capacitive component formed between the measurement electrode and the conductor.
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公开(公告)号：US20210027968A1
公开(公告)日：2021-01-28
申请号：US17044961
申请日：2019-04-03
发明人： Naomichi NAKAMURA , Hidetoshi TAKADA , Jun KATO
IPC分类号： H01H85/143 , H02H7/00
摘要： A fuse (1) with a frequency separation function includes an input port portion (1a), an output port portion (1b), a first transmitting portion (1c) which is provided between the input port portion and the output port portion, the first transmitting portion (1c) configured to transmit a lightning surge current entering the input port portion and guide the lightning surge current to the output port portion, a second transmitting portion (1d) which is provided between the input port portion and the output port portion, the second transmitting portion configured to be capable of transmitting a normal current and an abnormal current entering the input port portion, and a melting mechanism portion (1d-2) which is provided between the second transmitting portion and the input port portion or between the second transmitting portion and the output port portion, the melting mechanism configured not to melt and break when the normal current passes, and configured to melt and break when the abnormal current passes.
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公开(公告)号：US20220077590A1
公开(公告)日：2022-03-10
申请号：US17414475
申请日：2019-12-11
发明人： Go Itami , Yohei Toriumi , Jun KATO
IPC分类号： H01Q15/14
摘要： To provide a frequency selective surface of which an operating frequency and a bandwidth thereof can be readily adjusted. A frequency selective surface structured such that resonators kxy formed by conductive patterns with a same shape are periodically arranged on a dielectric substrate, wherein the resonator kxy includes: a conductor wire part with a lateral pattern 10 and a longitudinal pattern 20 which form a cross above a dielectric substrate 101; and an electrode plate part created by extending, in directions in which the lateral pattern and the longitudinal pattern are orthogonal to each other, respective both end parts of the lateral pattern and the longitudinal pattern having been extended by a prescribed length, the electrode plate part being shaped such that a tip portion thereof opposes a tip portion extended from another direction at an interval above a diagonal line, and the electrode plate part is shaped such that a central portion opposing an electrode plate part of another adjacent resonator is notched in a width of the lateral pattern, the electrode plate part being joined with the electrode plate part of the other adjacent resonator by being extended from a center of the notched portion in a width that is narrower than the width of the lateral pattern 10 and in a length that is shorter than the prescribed length, and the interval of the tip portion is wider than an interval with the electrode plate part of the other adjacent resonator.
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公开(公告)号：US20240256801A1
公开(公告)日：2024-08-01
申请号：US18289689
申请日：2021-05-17
发明人： Tatsuya IIZUKA , Go Itami , Naoko KOSAKA , Masato MARUYAMA , Toshimitsu TANAKA , Jun KATO
CPC分类号： G06K7/10009 , G01S13/583 , G01S7/025 , G01S13/90
摘要： A detecting system includes a tag, a radar device that transmits transmission radio waves to the tag and acquires reception radio waves produced by the transmission radio waves being reflected by the tag, and a detecting apparatus. The tag includes a pattern made of a plurality of materials that reflect or scatter radio waves received from the radar device, and the pattern includes a known pattern known to the detecting apparatus and an unknown pattern unknown to the detecting apparatus. The detecting apparatus includes a specifying unit that calculates a relative velocity between the radar device and the tag, with which the known pattern can be detected from the reception radio waves, and specifies a condition for the radar device to transmit transmission radio waves for estimating the unknown pattern, from the calculated relative velocity, and a notification unit that notifies the radar of the specified condition.
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7.发明公开公开(公告)号：US20240255548A1
公开(公告)日：2024-08-01
申请号：US18559866
申请日：2021-05-12
发明人： Naruto ARAI , Masato MARUYAMA , Jun KATO
CPC分类号： G01R15/16 , G01R19/0053
摘要： A wearable measurement system includes a voltage measurement apparatus and a conversion coefficient acquisition apparatus, and measures a ground voltage of electromagnetic noise generated in a cable. The voltage measurement apparatus includes a lower electrode, an upper electrode arranged opposite to the lower electrode, and a voltage measurement circuit connected between the lower electrode and the upper electrode. The conversion coefficient acquisition apparatus includes a first lower electrode, a second lower electrode arranged side by side at the same height as the first lower electrode, an upper electrode arranged opposite to the lower electrodes, a voltage measurement circuit connected between the lower electrode and the upper electrode, and an oscillation circuit connected to the lower electrode and the upper electrode and outputting a signal of a predetermined frequency. The lower electrodes of the voltage measurement apparatus and the conversion coefficient acquisition apparatus have a container shape.
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公开(公告)号：US20230194691A1
公开(公告)日：2023-06-22
申请号：US17925680
申请日：2020-05-29
发明人： Tatsuya IIZUKA , Yohei TORIUMI , Fumihiko ISHIYAMA , Jun KATO
IPC分类号： G01S13/536 , G01S7/35 , G01S13/42 , G01S7/41
CPC分类号： G01S13/536 , G01S7/354 , G01S13/42 , G01S7/415
摘要： A radar apparatus includes: a transmission unit that transmits a chirp signal; a reception unit that receives a reflected signal that is the chirp signal reflected by a scatterer; and a pole calculation unit that calculates a beat signal based on the chirp signal and the reflected signal and calculates a pole of the beat signal by eigenvalue decomposition of an autocorrelation matrix of the beat signal. The radar apparatus further includes: a complex amplitude calculation unit that calculates a complex amplitude corresponding to the pole by using a least squares method between a basis waveform corresponding to the pole and the beat signal; a distance calculation unit that calculates a distance to the scatterer based on the beat signal; and an intensity calculation unit that calculates an intensity of the reflected signal based on the complex amplitude.
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公开(公告)号：US20220276321A1
公开(公告)日：2022-09-01
申请号：US17632130
申请日：2019-08-14
发明人： Naruto ARAI , Ken OKAMOTO , Jun KATO
摘要： A device includes a resonant voltage measurement unit 10 configured to input a predetermined frequency signal to a circuit including a fixed capacitance formed between a ground and a lower electrode, a variable capacitance formed between an upper electrode that is disposed above the lower electrode and the ground or between the lower electrode and the upper electrode, and a resonance inductor to measure a resonant voltage that is dependent on a current flowing in the resonance inductor when the variable capacitance is changed to cause the circuit to resonate, a pre-correction voltage-to-ground measurement unit 20 configured to measure a pre-correction voltage-to-ground that is a voltage between a measurement electrode, which is disposed at an equal height to the lower electrode and forms a capacitance-to-ground between the measurement electrode and the ground, and a measurement probe connected to a conductor, and a voltage-to-ground correction unit 30 configured to use the fixed capacitance, the variable capacitance, and the resonant voltage to obtain the capacitance-to-ground and to calculate a voltage-to-ground obtained by correcting the pre-correction voltage-to-ground using the capacitance-to-ground.
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公开(公告)号：US20210408693A1
公开(公告)日：2021-12-30
申请号：US17289835
申请日：2019-10-16
发明人： Go ITAMI , Yohei TORIUMI , Jun KATO
摘要： To accurately estimate frequency characteristics from structural parameters of a frequency selective surface. A frequency selective surface design apparatus includes an LC generation unit 20 that receives an input of a structural parameter, and generates an inductance L and a capacitance C of a unit cell, a corrected resonance point calculation unit 30 that receives the number n of times of calculation input from an outside, the inductance L, and the capacitance C, models a correction circuit by using a circuit in which a virtual capacitance is connected in parallel via a transmission line to each distribution inductance obtained by division of the inductance L by the calculation number n and the transmission line is terminated at the capacitance C, and calculates a corrected resonant frequency fC from the impedance of the correction circuit, and a characteristic calculation unit 40 that receives inputs of the inductance L, the capacitance C, and the corrected resonant frequency fC, calculates a pre-correction resonant frequency from the inductance L and the capacitance C, obtains a correction coefficient by dividing the corrected resonant frequency fC by the pre-correction resonant frequency, and calculates a corrected return loss and a corrected insertion loss.
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