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公开(公告)号：US20230092461A1
公开(公告)日：2023-03-23
申请号：US17798350
申请日：2020-12-22
Applicant: Japan Aerospace Exploration Agency
Inventor： Yoshitsugu SONE , Motohiko SATO
IPC: H01M8/04302 , H01M8/04537 , H01M8/04858
Abstract: A method of controlling a fuel cell device includes: a step of supplying hydrogen to a hydrogen supply unit; a step of measuring a voltage between a fuel electrode and an oxidant electrode and determining whether the voltage is equal to or greater than a reference voltage; and a step of discharging a gas containing oxygen from the gas supply unit to the outside while supplying the gas to the gas supply unit when the voltage is equal to or greater than the reference voltage.
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公开(公告)号：US11577823B2
公开(公告)日：2023-02-14
申请号：US16976020
申请日：2019-01-23
Applicant: JAPAN AEROSPACE EXPLORATION AGENCY
Inventor： Tohru Hirai , Mitsuhiro Murayama , Kazuomi Yamamoto , Yasushi Ito , Kentaro Tanaka , Takehisa Takaishi , Yuzuru Yokokawa
Abstract: A noise reduction apparatus, an aircraft, and a noise reduction method capable of increasing the amount of noise reduction are provided. The noise reduction apparatus 1 includes a porous plate 2 disposed to face a fluid flow, the porous plate 2 including a bend region 5 bent toward an upstream side of the fluid flow. The bend region 5 is provided at the end portion 6 of the porous plate 2, and has a concave R-shape on an upstream side of the fluid flow.
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公开(公告)号：US11492149B2
公开(公告)日：2022-11-08
申请号：US16219993
申请日：2018-12-14
Applicant: Japan Aerospace Exploration Agency
Inventor： Takayuki Hirai , Hajime Yano
Abstract: A multi-layer insulation includes a plurality of layers that are laminated on each other. A detection layer that is at least one of the plurality of layers has a piezoelectric film, and a pair of electrode parts installed on both surfaces of the piezoelectric film.
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公开(公告)号：US20220299552A1
公开(公告)日：2022-09-22
申请号：US17669833
申请日：2022-02-11
Applicant: SUBARU CORPORATION , JAPAN AEROSPACE EXPLORATION AGENCY
Inventor： Hiroyuki Tsubata , Hiromitsu Miyaki , Takao Okada
IPC: G01R29/08
Abstract: According to one implementation, an aviation system 100 includes electric field sensors 112 and a ground system 114 including a computer configured to communicate with each of the electric field sensors 112. The computer is configured to: acquire electric field intensities from the electric field sensors 112 respectively, and generate a first electric field distribution on a ground surface 16 based on the electric field intensities; derive a matrix; derive a pseudo inverse matrix of the matrix; derive an electric charge distribution on the horizontal plane by multiplying the pseudo inverse matrix by the first electric field distribution on the ground surface 16; and derive a second electric field distribution on a flight path based on the electric charge distribution. The first electric field distribution on the ground surface 16 is derived by multiplying the matrix by electric charges temporarily set on a horizontal plane at a predetermined altitude.
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公开(公告)号：US20220155460A1
公开(公告)日：2022-05-19
申请号：US17597566
申请日：2020-07-17
Applicant: JAPAN AEROSPACE EXPLORATION AGENCY
Inventor： Hamaki INOKUCHI , Nobuki KOTAKE
Abstract: [Object] To provide a remote airflow observation device, a remote airflow observation method, and a program that are capable of eliminating the influence of scattered waves from the ground or some object and improving the reliability of airflow observation.
[Solving Means] A Doppler Lidar 100 includes: a measurement unit 110 that radiates transmission light including pulse-form laser light, receives reflected light of the radiated transmission light as reception light, and outputs a received signal for calculating a wind speed value on the basis of the transmission light and the reception light; and a signal processor 8 that performs processing for distributing the received signal to range bins by time-dividing the received signal and for removing a signal derived from a hard target from the received signal.-
Patent Agency Ranking
公开(公告)号：US11309623B2
公开(公告)日：2022-04-19
申请号：US16822457
申请日：2020-03-18
Inventor： Hirobumi Saito , Budhaditya Pyne , Jiro Hirokawa
Abstract: An antenna device includes: an antenna panel; one input terminal through which a high-frequency signal is input; and a feeding circuit which distributes the high-frequency signal input to the input terminal to a plurality of antenna elements provided on the antenna panel. The feeding circuit includes: at least one first-stage branch circuit which includes one input and two outputs; at least two second-stage branch circuits which receive outputs of the first-stage branch circuit and include one input and two outputs; and a combining circuit which includes two inputs and one output and receives two outputs selected from the outputs of the first-stage branch circuit and outputs of the second-stage branch circuit.
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公开(公告)号：US11259397B2
公开(公告)日：2022-02-22
申请号：US16652434
申请日：2018-11-22
Applicant: Japan Aerospace Exploration Agency
Inventor： Hitoshi Kuninaka
Abstract: In a microwave plasma source, a tubular magnet portion has a first opening end and a second opening end. The first opening end has a first polarity, and the second opening end has a second polarity. The tubular body is surrounded by the tubular magnet portion. A first magnetic circuit portion closes the first opening end. A second magnetic circuit portion is disposed opposite to the first magnetic circuit portion. The second magnetic circuit portion has a first opening part. An antenna penetrates the first magnetic circuit portion, is introduced to a space, and supplies microwave power to the space. The nozzle portion has a second opening part that has a smaller opening area than the first opening part and communicates with the first opening part. When an inner diameter of the tubular body is represented by a (mm), and a microwave cutoff wavelength of the microwave power being supplied to the space is represented by λ (mm), the microwave plasma source is configured to satisfy a relational expression λ>3.41×(a/2).
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公开(公告)号：US11174879B2
公开(公告)日：2021-11-16
申请号：US16562617
申请日：2019-09-06
Applicant: Japan Aerospace Exploration Agency
Inventor： Susumu Hasegawa , Kouichiro Tani
Abstract: An industrial ejector includes: a Laval nozzle in which a first channel which has a throat and along which a fluid flows in a first direction is formed; and a main body which is formed in a tubular shape, in which the Laval nozzle disposed therein is fixed to a part of an inner surface thereof, and in which a second channel is formed between the rest of the inner surface and the Laval nozzle. The second channel is disposed at a first side with respect to the first channel in a second direction perpendicular to the first direction. An opening is obliquely cut and formed in an end of the first channel at a downstream side and inclined toward the first side in the downstream direction and then toward the second channel.
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公开(公告)号：US11163148B2
公开(公告)日：2021-11-02
申请号：US16479533
申请日：2018-01-23
Applicant: Japan Aerospace Exploration Agency
Inventor： Yoshitomo Maeda , Manabu Ishida , Ryo Iizuka , Takayuki Hayashi
Abstract: A telescope system includes a telescope and a selective shielding unit including at least one member including a passage allowable region for an observation target electromagnetic wave and a passage blocking region for the observation target electromagnetic wave. The telescope includes a position detectable detector that detects the observation target electromagnetic wave on a surface different from a focal plane of the telescope. The selective shielding unit is disposed on a front side of the detector. Patterns of the passage allowable region and the passage blocking region of the at least one member and disposition of the at least one member are set to allow for reconstruction of an observation image based on an image detected in the detector.
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公开(公告)号：US11156571B2
公开(公告)日：2021-10-26
申请号：US16409884
申请日：2019-05-13
Inventor： Hiroyuki Kukita , Shunichi Wakamatsu , Tsuyoshi Shiobara , Takayuki Ishikawa , Eiji Miyazaki , Yuta Tsuchiya
IPC: G01N25/08 , G01K11/26 , H03B5/04 , H03B5/32 , G01N5/04 , G01N29/036 , G01N29/44 , G01N29/30 , G01N29/24 , G01N29/02 , G01N29/34
Abstract: A substance detection system and a substance detection method are provided. The temperature identifying portion identifies a surface temperature of the quartz substrate, based on a difference between a deviation of the fundamental wave frequency from at least any predetermined reference fundamental wave frequency of the reference crystal resonator and the detecting crystal resonator and a deviation of the third harmonic frequency from a predetermined reference third harmonic frequency. The substance identifying portion identifies a temperature at which a contaminant attached to the detecting crystal resonator is desorbed from the detecting crystal resonator to identify the contaminant based on the temperature at which the contaminant is desorbed. The temperature is identified based on a difference between the fundamental wave frequency of the reference crystal resonator and the fundamental wave frequency of the detecting crystal resonator measured by the frequency measuring portion and the temperature identified by the temperature identifying portion.
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