Patents by Inventor Yoshitake Ageishi

Yoshitake Ageishi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190250202
    Abstract: A method for testing a multicore cable that includes a single common shield covering plural insulated wires. The testing method includes inputting a test signal, by capacitive coupling, to an end portion of the insulated wire under test among end portions of the insulated wires exposed at one end of the multicore cable, and measuring voltages of output signals output by capacitive coupling respectively from end portions of the insulated wires exposed at the other end of the multicore cable, and identifying the other end portion of the insulated wire under test based on the measured voltages. The voltages of output signals are measured in a state that an output variation reduction capacitive element is connected in series with a coupling capacitance generated by the capacitive coupling.
    Type: Application
    Filed: November 21, 2018
    Publication date: August 15, 2019
    Applicant: Hitachi Metals, Ltd.
    Inventors: Yohei SHIRAKAWA, Yoshitake AGEISHI
  • Publication number: 20190212380
    Abstract: A method for testing a multicore cable including a single common shield covering plural insulated wires to identify a correspondence relation between one end portion and the other end portion of the insulated wires exposed from both ends of the multicore cable. The testing method includes allowing the common shield to have a same potential as a measurement system ground, inputting a test signal, by capacitive coupling, to an end portion of the insulated wire under test among end portions of the insulated wires exposed at one end of the multicore cable, and measuring voltages of output signals output by capacitive coupling respectively from end portions of the insulated wires exposed at the other end of the multicore cable, and identifying the other end portion of the insulated wire under test based on the measured voltages.
    Type: Application
    Filed: November 21, 2018
    Publication date: July 11, 2019
    Applicant: HITACHI METALS, LTD.
    Inventors: Yohei SHIRAKAWA, Yoshitake AGEISHI
  • Publication number: 20190212379
    Abstract: A method for testing a multicore cable including not less than three insulated wires to identify a correspondence relationship between one end portion and an other end portion of the insulated wires exposed from both ends of the multicore cable. The method includes inputting a test signal, by capacitive coupling, to an end portion of the tested insulated wire among end portions of the insulated wires exposed at one end of the multicore cable, inputting a phase-inverted test signal in an opposite phase to that of the test signal, by capacitive coupling, to an end portion of the insulated wire, other than the end portion of the tested insulated wire, and measuring voltages of output signals output respectively from end portions of the insulated wires exposed at the other end of the multicore cable to identify an other end portion of the tested insulated wire based on the measured voltages.
    Type: Application
    Filed: November 21, 2018
    Publication date: July 11, 2019
    Applicant: HITACHI METALS, LTD.
    Inventors: Yohei SHIRAKAWA, Yoshitake AGEISHI
  • Patent number: 10270676
    Abstract: A signal detecting device provided in a connector at an end of a communication cable or in a communication device to which the connector is connected. The signal detecting device includes a detection circuit that branches and extracts a portion of a signal transmitted through the communication cable and indicates existence of a data communication based on the extracted signal, and a self-diagnostic circuit that inputs a diagnostic signal into the detection circuit upon diagnosis of the detection circuit.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: April 23, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Yohei Shirakawa, Koki Hirano, Yoshitake Ageishi, Yuki Haga
  • Patent number: 10149378
    Abstract: A communication device is provided wherein a number of the pairs of transmission lines is N, each pair of the transmission lines comprises (N?1) stages of sub-transmission lines generating a same amount of crosstalk as that caused at a connector, and (N?1) stages of connecting portions comprise a transmission path of the connector and a first stage sub-transmission line, and (N?1) stages of the connecting portions to connect an i th stage sub-transmission line and an (i+1) th stage sub-transmission line by the straight/cross connection, and wherein each pair of the transmission lines is different in all pairs in a number of the connecting portion having the cross connection; and as a j th stage connecting portion in any one pair of the transmission lines has cross connection, a (N?j) th stage connecting portion in the any one pair of the transmission lines also has cross connection.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: December 4, 2018
    Assignee: HITACHI METALS, LTD.
    Inventors: Yohei Shirakawa, Koki Hirano, Yoshitake Ageishi, Yuki Haga
  • Patent number: 10075211
    Abstract: A crosstalk reduction method includes providing a signal transmission unit including first to eighth main transmission paths, the first and second paths, the third and sixth paths, the fourth and fifth paths and the seventh and eighth paths being respectively paired to transmit differential signals, providing a first coupling transmission path in the signal transmission unit, the first coupling transmission path being adapted to electrically couple the third main transmission path to the fifth and seventh main transmission paths that are located adjacent to the sixth main path, and providing a second coupling transmission path in the signal transmission unit, the second coupling transmission path being adapted to electrically couple the sixth main transmission path to the second and fourth main transmission path that are located adjacent to the third main transmission path.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: September 11, 2018
    Assignee: HITACHI METALS, LTD.
    Inventors: Yohei Shirakawa, Koki Hirano, Yoshitake Ageishi
  • Patent number: 9842482
    Abstract: A signal detecting device includes a visualization device including a plural connectors to which a communication cable is connected, a plural detecting circuits that are provided for each of the connectors to be detected, branch and extract a part of a signal transmitted through the communication cable connected to the connectors, and indicate an existence of an data communication based on the extracted signal, and a detecting card that is insertable into and detachable from a card connector arranged in the visualization device and mounts at least a part of the detecting circuit.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: December 12, 2017
    Assignee: Hitachi Metals, Ltd.
    Inventors: Yohei Shirakawa, Koki Hirano, Yoshitake Ageishi, Yuki Haga
  • Patent number: 9826631
    Abstract: A repeater includes two connectors each including electrodes and configured to connect a communication cable through which a differential signal is transmitted, a circuit board on which the two connectors are mounted and which includes a signal transmission section configured to connect corresponding electrodes of the two connectors together, and a signal detection circuit mounted on the circuit board and configured to extract a part of a signal transmitted through the signal transmission section and indicate the presence or absence of information communication based on the extracted signal. The circuit board includes a multi-layer substrate including at least an inner layer in which the signal transmission section is formed, two shield layers configured to interpose the signal transmission section therebetween, and an outer layer outside the shield layer on which the signal detection circuit is mounted.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: November 21, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Yohei Shirakawa, Koki Hirano, Yoshitake Ageishi, Yuki Haga
  • Patent number: 9769039
    Abstract: A communication visualization device includes a transformer for converting a magnetic field caused from a LAN cable connected to an information communication apparatus into electric energy at time of information communication, an amplifier circuit for amplifying the electric energy output from the transformer, a rectifier circuit for converting an amplified signal amplified by the amplifier circuit into a DC voltage, and a light-emitting circuit for emitting light when the DC voltage obtained by conversion of the rectifier circuit is supplied thereto.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: September 19, 2017
    Assignee: Hitachi Metals, Ltd.
    Inventors: Yohei Shirakawa, Koki Hirano, Takumi Kobayashi, Yoshitake Ageishi
  • Patent number: 9729354
    Abstract: A cable signal detector for being provided at a connector at an end of a communication cable transmitting differential signals or at a relay connector to be connected to the connector to detect an existence of information communication. The cable signal detector includes an amplifier circuit that branches and extracts a portion of a signal transmitted through the communication cable, amplifies the extracted signal and outputs the amplified signal, and a display portion that display the existence of information communication based on the output of the amplifier circuit. The amplifier circuit is mounted on a detection device formed separately from the connector or the relay connector. The connector or the relay connector is configured to transmit the extracted signal to the detection device.
    Type: Grant
    Filed: October 31, 2015
    Date of Patent: August 8, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Yohei Shirakawa, Koki Hirano, Yoshitake Ageishi
  • Patent number: 9712372
    Abstract: A cable signal detector is configured to detect the presence or absence of information communication in a communication cable including a plurality of signal line pairs for differential signaling. The cable signal detector includes a plurality of detecting portions each of which is configured to partially branch and draw a transmission signal from a different signal line pair, rectify the branched and drawn signal into a direct current, and output that direct current, and a displaying portion configured to display the presence or absence of information communication, based on outputs of the plurality of detecting portions. The outputs of the plurality of detecting portions are connected in series, and the displaying portion is configured to display the presence or absence of information communication, based on an overall output voltage of the plurality of detecting portions connected in series.
    Type: Grant
    Filed: October 31, 2015
    Date of Patent: July 18, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Yohei Shirakawa, Koki Hirano, Yoshitake Ageishi
  • Patent number: 9692683
    Abstract: A communication visualization system includes a wireless power-feeding device for transmitting electromagnetic energy in a wireless manner and a communication visualization device for notifying that a LAN cable connected to an information communication apparatus is performing information communication. The communication visualization device includes an antenna part for receiving the electromagnetic energy transmitted from the wireless power-feeding device, a rectifier circuit for rectifying the electromagnetic energy received by the antenna part to generate a DC voltage, an amplifier circuit for amplifying a communication signal transferred to the communication cable at the time of information communication by using the DC voltage generated by the rectifier circuit as operation power, a rectifier circuit for converting the amplified communication signal into a DC voltage, and a light-emitting circuit for emitting light when the DC voltage after conversion is supplied.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: June 27, 2017
    Assignee: Hitachi Metals, Ltd.
    Inventors: Yohei Shirakawa, Koki Hirano, Takumi Kobayashi, Yoshitake Ageishi
  • Patent number: 9608393
    Abstract: A repeater includes two connectors to each of which a communication cable is connected and a circuit board on which the two connectors are mounted and which includes a signal transmission section configured to connect corresponding ones of electrodes of the two connectors together, and the two connectors are mounted on different surfaces of the circuit board such that the communication cables are inserted in opposite insertion directions.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: March 28, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Yohei Shirakawa, Koki Hirano, Yoshitake Ageishi
  • Publication number: 20170063663
    Abstract: A signal detecting device provided in a connector at an end of a communication cable or in a communication device to which the connector is connected. The signal detecting device includes a detection circuit that branches and extracts a portion of a signal transmitted through the communication cable and indicates existence of a data communication based on the extracted signal, and a self-diagnostic circuit that inputs a diagnostic signal into the detection circuit upon diagnosis of the detection circuit.
    Type: Application
    Filed: August 26, 2016
    Publication date: March 2, 2017
    Inventors: Yohei SHIRAKAWA, Koki Hirano, Yoshitake Ageishi, Yuki Haga
  • Publication number: 20170061769
    Abstract: A signal detecting device includes a visualization device including a plural connectors to which a communication cable is connected, a plural detecting circuits that are provided for each of the connectors to be detected, branch and extract a part of a signal transmitted through the communication cable connected to the connectors, and indicate an existence of an data communication based on the extracted signal, and a detecting card that is insertable into and detachable from a card connector arranged in the visualization device and mounts at least a part of the detecting circuit.
    Type: Application
    Filed: August 26, 2016
    Publication date: March 2, 2017
    Inventors: Yohei SHIRAKAWA, Koki HIRANO, Yoshitake AGEISHI, Yuki HAGA
  • Patent number: 9583894
    Abstract: A cable signal detector includes a detection unit that is provided in a connector attached to an end of a communication cable or in a relay connector to be connected to the connector, and branches, extracts and sends a portion of signal transmitted through the cable, and a visualization unit that is provided separately from the connector or the relay connector and includes a light-emitting circuit to emit a light when receiving the signal sent from the detection unit.
    Type: Grant
    Filed: June 6, 2015
    Date of Patent: February 28, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Yohei Shirakawa, Koki Hirano, Takumi Kobayashi, Yoshitake Ageishi
  • Publication number: 20170013706
    Abstract: A communication device is provided wherein a number of the pairs of transmission lines is N, each pair of the transmission lines comprises (N?1) stages of sub-transmission lines generating a same amount of crosstalk as that caused at a connector, and (N?1) stages of connecting portions comprise a transmission path of the connector and a first stage sub-transmission line, and (N?1) stages of the connecting portions to connect an i th stage sub-transmission line and an (i+1) th stage sub-transmission line by the straight/cross connection, and wherein each pair of the transmission lines is different in all pairs in a number of the connecting portion having the cross connection; and as a j th stage connecting portion in any one pair of the transmission lines has cross connection, a (N?j) th stage connecting portion in the any one pair of the transmission lines also has cross connection.
    Type: Application
    Filed: July 6, 2016
    Publication date: January 12, 2017
    Inventors: Yohei SHIRAKAWA, Koki HIRANO, Yoshitake AGEISHI, Yuki HAGA
  • Publication number: 20160210824
    Abstract: A repeater includes two connectors each including electrodes and configured to connect a communication cable through which a differential signal is transmitted, a circuit board on which the two connectors are mounted and which includes a signal transmission section configured to connect corresponding electrodes of the two connectors together, and a signal detection circuit mounted on the circuit board and configured to extract a part of a signal transmitted through the signal transmission section and indicate the presence or absence of information communication based on the extracted signal. The circuit board includes a multi-layer substrate including at least an inner layer in which the signal transmission section is formed, two shield layers configured to interpose the signal transmission section therebetween, and an outer layer outside the shield layer on which the signal detection circuit is mounted.
    Type: Application
    Filed: January 6, 2016
    Publication date: July 21, 2016
    Inventors: Yohei Shirakawa, Koki Hirano, Yoshitake Ageishi, Yuki Haga
  • Publication number: 20160197425
    Abstract: A repeater includes two connectors to each of which a communication cable is connected and a circuit board on which the two connectors are mounted and which includes a signal transmission section configured to connect corresponding ones of electrodes of the two connectors together, and the two connectors are mounted on different surfaces of the circuit board such that the communication cables are inserted in opposite insertion directions.
    Type: Application
    Filed: January 4, 2016
    Publication date: July 7, 2016
    Inventors: Yohei Shirakawa, Koki Hirano, Yoshitake Ageishi
  • Publication number: 20160132416
    Abstract: A communication monitoring system includes a plurality of detecting portions each provided at a connector at an end of a communication cable or at a relay connector to be connected to the connector to branch, extract and output a portion of a signal transmitted through the communication cable, and a monitoring unit configured to monitor an existence of information communication through each of the communication cables provided with the detecting portions based on an output from the plurality of detecting portions.
    Type: Application
    Filed: October 31, 2015
    Publication date: May 12, 2016
    Inventors: Yohei SHIRAKAWA, Koki Hirano, Yoshitake Ageishi