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公开(公告)号：US12153036B2
公开(公告)日：2024-11-26
申请号：US17431571
申请日：2020-02-06
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yosuke Takeuchi , Takuya Kamisho , Masayuki Tsuda
IPC: G01N33/2045 , G01N17/00
Abstract: To improve the accuracy of estimating when a fracture occurred in the metal material. In the estimation apparatus, the fracture temperature estimation unit performs estimate calculation of the fracture temperature of a fractured metal material from the hydrogen embrittlement rate of the fractured metal material, the fracture occurrence time narrowing unit performs calculation by using the temperature information of the installation environment in which the fractured metal material is installed and narrow down the period during which the fracture temperature is obtained as the fracture occurrence period of the metal material, and the fracture time estimation unit performs estimate calculation of the timing of when stress was applied to the fractured metal material during the fracture occurrence period as the timing of when a fracture occurred in the metal material.
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公开(公告)号：US12025608B2
公开(公告)日：2024-07-02
申请号：US17776265
申请日：2019-11-13
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Yosuke Takeuchi , Yosuke Okamura , Junichiro Tamamatsu
CPC classification number: G01N33/383 , G01M5/0033 , G01M5/0058 , G01M99/007
Abstract: An estimation method includes: an acquisition step (S101) of acquiring deflection stress information that indicates a relationship between a deflection and a tensile stress of a specimen (200) of a reinforced concrete structure; and a derivation step (S102) of deriving an estimation formula for estimating a depth of a crack generated in the reinforced concrete structure when a deflection of the reinforced concrete structure is no less than a first deflection of the specimen at a start of a generation of the crack, and is no greater than a second deflection of the specimen at an end of the generation of the crack.
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公开(公告)号：US11913895B2
公开(公告)日：2024-02-27
申请号：US15734654
申请日：2019-05-28
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yosuke Takeuchi , Takuya Kamisho , Masamitsu Watanabe
Abstract: To easily detect a crack having occurred in a steel material. A current measurement device measures a value of a current flowing through a target steel material that is immersed in an electrolyte aqueous solution and applied with tensile stress while subjected to hydrogen charging, and a device for detecting the occurrence of a crack or the like uses the measured current value to determine the occurrence of a crack in the target steel material when the amount of change in the current flowing through the target steel material, the change rate of the amount of change in the current, or the change rate of the change rate of the amount of change in the current exceeds a threshold value. The device for detecting the occurrence of a crack or the like determines the occurrence of a crack in the steel material when the change rate of the change rate of the amount of change in the current is less than a negative value of an absolute value of the threshold value, and determines the occurrence of fracture in the steel material when the change rate exceeds the absolute value of the threshold value.
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公开(公告)号：US20220252490A1
公开(公告)日：2022-08-11
申请号：US17618369
申请日：2019-06-26
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Takuya Kamisho , Ryuta Ishii , Yosuke Takeuchi , Masayuki Tsuda
Abstract: Provided is a method for evaluating a hydrogen embrittlement fracture risk of an iron reinforcing bar that is performed by a hydrogen embrittlement fracture risk evaluation apparatus, the method including: a fracture probability curved surface generation step of obtaining a fracture probability curved surface representing a probability of the iron reinforcing bar fracturing by performing regression analysis on results obtained by repeatedly carrying out a hydrogen embrittlement test while changing an amount of hydrogen absorbed in the iron reinforcing bar provided in a concrete structure and a tensile stress applied to the iron reinforcing bar and using the amount of hydrogen and the tensile stress as variables; a lower limit stress acquisition step of acquiring, from the fracture probability curved surface, a lower limit stress property representing a relationship between a lower limit stress that is a lower limit of the tensile stress at which no fracture occurs in the iron reinforcing bar at a predetermined probability and the amount of hydrogen; and an evaluation step.
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公开(公告)号：US12041707B2
公开(公告)日：2024-07-16
申请号：US17269478
申请日：2019-08-23
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yosuke Takeuchi , Masahiro Sotoma , Takuya Kamisho , Masayuki Tsuda
CPC classification number: H05B6/10 , E04G23/0218 , H05B6/36
Abstract: A repair apparatus for repairing damaged reinforcing bars in a structure includes a strip-shaped conductor including conductive wires arranged in a height direction, the conductive wires being arranged in parallel, a high-frequency current generation unit configured to supply a high-frequency current between the conductive wires of a first end side of the conductor and the conductive wires of a second end side of the conductor, and a connection body configured to connect the conductive wires to each other and connect the first end side and the second end side of the conductor so that the conductive wires form a coil, and the high-frequency current generation unit supplies a high-frequency current between a conductive wire at an upper end or a lower end of the first end side of the conductor and a conductive wire at a lower end or an upper end of the second end side of the conductor.
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Patent Agency Ranking
公开(公告)号：US11506649B2
公开(公告)日：2022-11-22
申请号：US17053586
申请日：2019-04-24
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Takuya Kamisho , Masamitsu Watanabe , Takashi Miwa , Yosuke Takeuchi
IPC: G01N33/2022
Abstract: To estimate penetration behavior of hydrogen up until hydrogen content reaches saturation even if load stress on steel is equal to or higher than threshold stress. A hydrogen penetration behavior estimation device includes a first measurement data input unit adapted to input first measurement data concerning variation of hydrogen content with time up until hydrogen content in steel-to-be-estimated reaches saturation when measurements are taken by applying such stress to the steel that no hydrogen embrittlement fracture occurs; a second measurement data input unit adapted to input second measurement data concerning variation of hydrogen content in the steel-to-be-estimated with time up until the steel fractures when measurements are taken by applying such stress to the steel that hydrogen embrittlement fracture occurs; a ratio calculation unit adapted to calculate increases in hydrogen contents in an initial stage of measurement and calculate a ratio of the second measurement data to the first measurement data in terms of increase in hydrogen content; and a saturated hydrogen content calculation unit adapted to multiply saturated hydrogen content based on the first measurement data by the ratio and designate the product as saturated hydrogen content of the steel-to-be-estimated, the saturated hydrogen content being reached upon application of such stress that hydrogen embrittlement fracture occurs.
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公开(公告)号：US20220016591A1
公开(公告)日：2022-01-20
申请号：US17295988
申请日：2019-11-12
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yosuke Takeuchi , Masayuki Tsuda , Yoko Ono , Takuya Kamisho
Abstract: A hydrogen generation device capable of generating hydrogen using an inexpensive material is provided. The hydrogen generation device includes: a water flow path unit through which a solution flows in from outside and exits; a hydrogen generation unit made of a metal, the hydrogen generation unit generating hydrogen by a reaction with the flowing-in solution; and a hydrogen collection unit for collecting the generated hydrogen, wherein the hydrogen generation unit is disposed so that friction with the flowing-in solution peels off a surface film of the metal to expose an active surface of the metal, the metal being the hydrogen generation unit itself.
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公开(公告)号：US20210381238A1
公开(公告)日：2021-12-09
申请号：US17431953
申请日：2020-02-14
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yosuke Takeuchi , Ryuta Ishii , Takuya Kamisho , Masayuki Tsuda
Abstract: Reinforced concrete is protected from corrosion without conducting an operation involving exposure of rebar. A reinforced concrete structure is provided with a storage part that is formed inside concrete of the reinforced concrete structure, and that retains an anticorrosion solution. The anticorrosion solution diffuses and permeates through the concrete from the storage part, prevents the concrete in the vicinity of rebar from drying, and passivates the rebar.
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公开(公告)号：US20210315066A1
公开(公告)日：2021-10-07
申请号：US17269478
申请日：2019-08-23
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yosuke Takeuchi , Masahiro Sotoma , Takuya Kamisho , Masayuki Tsuda
Abstract: A repair apparatus for repairing damaged reinforcing bars in a structure includes a strip-shaped conductor including a plurality of conductive wires arranged in a height direction, the plurality of conductive wires being arranged in parallel to each other, a high-frequency current generation unit configured to supply a high-frequency current between the plurality of conductive wires of a first end side of the conductor and the plurality of conductive wires of a second end side of the conductor, and a connection body configured to connect the plurality of conductive wires to each other and connect the first end side and the second end side of the conductor so that the plurality of conductive wires form a coil, and the high-frequency current generation unit supplies a high-frequency current between a conductive wire at an upper end or a lower end of the first end side of the conductor and a conductive wire at a lower end or an upper end of the second end side of the conductor.
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20.发明授权Wavelength selection switch system and method for controlling wavelength selection switch 有权波长选择开关系统及波长选择开关控制方法公开(公告)号：US09294826B2
公开(公告)日：2016-03-22
申请号：US14376786
申请日：2013-02-05
Inventor： Tomoyoshi Kataoka , Mitsunori Fukutoku , Etsu Hashimoto , Akio Sahara , Norio Sato , Yosuke Takeuchi
CPC classification number: H04Q11/0005 , G02B26/0816 , H04J14/0212 , H04Q2011/0037
Abstract: A wavelength selection switch system includes a wavelength selection switch including an input port and an output port, a nonvolatile memory in which configuration information for controlling an operation of the wavelength selection switch is stored, a high-speed memory in which reading and writing can be performed at a higher speed than in the nonvolatile memory and that stores a copy of the configuration information stored in the nonvolatile memory, and a control unit that controls an operation of the wavelength selection switch based on the configuration information read from the high-speed memory, wherein the control unit periodically reads the configuration information stored in the nonvolatile memory and writes a copy of the read configuration information to the high-speed memory.
Abstract translation: 波长选择开关系统包括：波长选择开关，包括输入端口和输出端口;非易失性存储器，其中存储用于控制波长选择开关的操作的配置信息;读取和写入可以是高速存储器 以比非易失性存储器更高的速度执行，并且存储存储在非易失性存储器中的配置信息的副本，以及控制单元，其基于从高速存储器读取的配置信息来控制波长选择开关的操作 其中，所述控制单元周期性地读取存储在所述非易失性存储器中的配置信息，并将所读取的配置信息的副本写入所述高速存储器。
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