Patents by Inventor Katsuaki Hamamoto

Katsuaki Hamamoto 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).

  • Patent number: 12062932
    Abstract: Controller (12) of power storage pack (10) communicates with controller (32) of electric moving body (30) in a state where power storage pack (10) is mounted to the electric moving body. Communication wiring (Lc1) connects a node of power line (Lp1) on power source terminal (Tp) side relative to first switch (RYp) and controller (12) of power storage pack (10). Overvoltage protection circuit (19) turns off second switch (SWc) inserted into communication wiring (Lc1) upon detecting an overvoltage of power line (Lp1) during communication between controller (12) of power storage pack (10) and controller (32) of the electric moving body.
    Type: Grant
    Filed: March 18, 2021
    Date of Patent: August 13, 2024
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masaaki Kuranuki, Katsuaki Hamamoto, Ryosuke Nagase
  • Patent number: 11989070
    Abstract: An electric movable body transmits a signal including identification information identical to identification information retained in a first power storage pack via near-field communication when the first power storage pack is detached from the electric movable body. A charging device wiredly transmits the identification information received from the electric movable body to a second power storage pack. The second power storage pack transmits via near-field communication a signal including the identification information received from the charging device. The electric movable body collates whether or not the identification information included in the received signal matches the identification information retained in the first power storage pack.
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: May 21, 2024
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Katsuaki Hamamoto, Masaaki Kuranuki, Ryosuke Nagase
  • Publication number: 20230155401
    Abstract: Controller (12) of power storage pack (10) communicates with controller (32) of electric moving body (30) in a state where power storage pack (10) is mounted to the electric moving body. Communication wiring (Lc1) connects a node of power line (Lp1) on power source terminal (Tp) side relative to first switch (RYp) and controller (12) of power storage pack (10). Overvoltage protection circuit (19) turns off second switch (SWc) inserted into communication wiring (Lc1) upon detecting an overvoltage of power line (Lp1) during communication between controller (12) of power storage pack (10) and controller (32) of the electric moving body.
    Type: Application
    Filed: March 18, 2021
    Publication date: May 18, 2023
    Inventors: MASAAKI KURANUKI, KATSUAKI HAMAMOTO, RYOSUKE NAGASE
  • Publication number: 20230095740
    Abstract: Controller of power storage pack performs communication for authentication with controller of an electric moving body according to the pattern of a current flowing through a power line in a state where power storage pack is mounted to electric moving body. Controller of power storage pack measures contact resistance between power storage pack and the electric moving body based on voltage of the power line on power storage pack side, voltage of the power line on the electric moving body side received from controller of the electric moving body, and current when communication for authentication is performed according to the pattern of a current flowing through the power line.
    Type: Application
    Filed: March 18, 2021
    Publication date: March 30, 2023
    Inventors: MASAAKI KURANUKI, KATSUAKI HAMAMOTO, RYOSUKE NAGASE
  • Publication number: 20230062322
    Abstract: An electric movable body transmits a signal including identification information identical to identification information retained in a first power storage pack via near-field communication when the first power storage pack is detached from the electric movable body. A charging device wiredly transmits the identification information received from the electric movable body to a second power storage pack. The second power storage pack transmits via near-field communication a signal including the identification information received from the charging device. The electric movable body collates whether or not the identification information included in the received signal matches the identification information retained in the first power storage pack.
    Type: Application
    Filed: December 28, 2020
    Publication date: March 2, 2023
    Inventors: Katsuaki HAMAMOTO, Masaaki KURANUKI, Ryosuke NAGASE
  • Publication number: 20230050076
    Abstract: A first power storage pack wiredly transmits identification information retained in the first power storage pack to a charging device when the first power storage pack is detached from an electric movable body. The charging device wiredly transmits the identification information received from the first power storage pack to a second power storage pack. The controller of the second power storage pack transmits via near-field communication a signal including the identification information received from the charging device. The electric movable body collates whether or not the identification information included in the received signal matches the identification information retained in the first power storage pack.
    Type: Application
    Filed: January 6, 2021
    Publication date: February 16, 2023
    Inventors: KATSUAKI HAMAMOTO, MASAAKI KURANUKI, RYOSUKE NAGASE
  • Publication number: 20230046158
    Abstract: A charging device wiredly transmits identification information to a power storage pack after the power storage pack is mounted. The power storage pack transmits via near-field communication a signal including the identification information received from the charging device. The charging device collates whether or not the identification information included in the received signal matches the identification information wiredly transmitted.
    Type: Application
    Filed: December 28, 2020
    Publication date: February 16, 2023
    Inventors: KATSUAKI HAMAMOTO, MASAAKI KURANUKI, RYOSUKE NAGASE
  • Patent number: 11050293
    Abstract: A plurality of controlling circuits control a plurality of respective shutdown switches to turn ON/OFF. A first signal system transmits, in a direction from one end of the plurality of controlling circuits to the other end of the plurality of controlling circuits, a significant signal during a normal operation and a non-significant signal when the operation needs to be stopped. The second signal system transmits, in a direction from the other end of the plurality of controlling circuits to the one end of the plurality of controlling circuits, a significant signal during the normal operation and a non-significant signal when the operation needs to be stopped. The other end of the plurality of controlling circuits transmits the non-significant signal through second signal system when a signal received through first signal system is the non-significant signal.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: June 29, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yuta Kurosaki, Shintaro Hino, Masahiro Arakawa, Katsuaki Hamamoto
  • Patent number: 10877095
    Abstract: In a power storage system, a first switch is connected between a first node and a second node. The first node is connected to a positive terminal of a power storage unit, and the second node is connected to a positive terminal of a load. A second switch is connected between a third node and a fourth node. The third node is connected to a negative terminal of the power storage unit, and the fourth node is connected to a negative terminal of the load. A first comparator circuit compares a first voltage based on a voltage between the first and fourth nodes with a first reference voltage. A second comparator circuit compares a second voltage based on a voltage between the second and third nodes with a second reference voltage.
    Type: Grant
    Filed: September 4, 2017
    Date of Patent: December 29, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Katsuaki Hamamoto
  • Publication number: 20200044465
    Abstract: A plurality of controlling circuits control a plurality of respective shutdown switches to turn ON/OFF. A first signal system transmits, in a direction from one end of the plurality of controlling circuits to the other end of the plurality of controlling circuits, a significant signal during a normal operation and a non-significant signal when the operation needs to be stopped. The second signal system transmits, in a direction from the other end of the plurality of controlling circuits to the one end of the plurality of controlling circuits, a significant signal during the normal operation and a non-significant signal when the operation needs to be stopped. The other end of the plurality of controlling circuits transmits the non-significant signal through second signal system when a signal received through first signal system is the non-significant signal.
    Type: Application
    Filed: October 15, 2019
    Publication date: February 6, 2020
    Inventors: YUTA KUROSAKI, SHINTARO HINO, MASAHIRO ARAKAWA, KATSUAKI HAMAMOTO
  • Publication number: 20190204388
    Abstract: In a power storage system, a first switch is connected between a first node and a second node. The first node is connected to a positive terminal of a power storage unit, and the second node is connected to a positive terminal of a load. A second switch is connected between a third node and a fourth node. The third node is connected to a negative terminal of the power storage unit, and the fourth node is connected to a negative terminal of the load. A first comparator circuit compares a first voltage based on a voltage between the first and fourth nodes with a first reference voltage. A second comparator circuit compares a second voltage based on a voltage between the second and third nodes with a second reference voltage.
    Type: Application
    Filed: September 4, 2017
    Publication date: July 4, 2019
    Inventor: KATSUAKI HAMAMOTO
  • Patent number: 7895505
    Abstract: An input unit inputs sequentially bit data, where the bit data is convolutionally coded by a generator matrix defined according to a constraint length and a coding rate and has the number of streams defined by the coding rate. A temporary decoded data shift register unit delays temporary decoded data over at least a period of time corresponding to the constraint length. A generation unit generates, per stream, bit data serving as candidates for a decoding, by performing exclusive OR based on the generator matrix on the delayed temporary decoded data and the inputted bit data. A comparator and a selector select any of the bit data per stream generated by the generation unit, as a decoding result, and outputs the selected decoding result.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: February 22, 2011
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Katsuaki Hamamoto
  • Publication number: 20090060071
    Abstract: A phase derivation unit derives a phase difference between two symbols for each subcarrier, based on phase components of symbols. A weighting factor derivation unit derives a weighting factor for each subcarrier, based on amplitude components of the symbols. A multiplier weights the phase difference with the weighting factor for each subcarrier. A likelihood accumulation unit accumulates the weighted phase differences for a plurality of subcarriers. A decision units determines a result of accumulation. A substitution unit identifies a portion where known data are to be assigned, among the determined data frames, and substitutes the data in the identified portion with known data. A syndrome computation unit performs a syndrome computation on the data frames. An error detector detects an error in the data frames, based on a result of the syndrome computation.
    Type: Application
    Filed: August 26, 2008
    Publication date: March 5, 2009
    Inventor: Katsuaki HAMAMOTO
  • Publication number: 20090060072
    Abstract: A phase derivation unit derives a phase difference between two symbols for each subcarrier, based on phase components of symbols. A weighting factor derivation unit derives a weighting factor for each subcarrier, based on amplitude components of the symbols. A multiplier weights the phase difference with the weighting factor for each subcarrier. A likelihood accumulation unit accumulates the weighted phase differences for a plurality of subcarriers. A decision units determines a result of accumulation. A substitution unit identifies a portion where known data are to be assigned, among the determined data frames, and substitutes the data in the identified portion with known data. A syndrome computation unit performs a syndrome computation on the data frames. An error detector detects an error in the data frames, based on a result of the syndrome computation.
    Type: Application
    Filed: August 27, 2008
    Publication date: March 5, 2009
    Inventor: Katsuaki HAMAMOTO
  • Patent number: 7457384
    Abstract: A derivation unit derives SNRs corresponding respectively to two repeated OFDM symbols having the same content. The derivation unit generates, from the derived SNRs, a control signal necessary for deriving weighting factors and then outputs this control signal as a combined control signal. An FFT unit performs FFT on a signal combined by a delay symbol synthesizing unit. An equalization unit performs equalization processing on subcarrier signals inputted from the FFT unit. While associating two weighting factors with OFDM symbols of the same content, a synthesis unit weights the OFDM symbols of the same content with the weighting factors and then combines the OFDM symbols of the same content among equalization data.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: November 25, 2008
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Katsuaki Hamamoto
  • Patent number: 7333792
    Abstract: An FFT unit subjects a baseband signal to FFT operation. An IQ-to-phase conversion unit converts an in-phase component value and a quadrature component value of each of a plurality of signals on respective subcarriers subjected to FFT into a phase component value. A phase equalization unit generates a plurality of reference phase values, based on the phase component of each of the plurality of signals on the respective carriers. Further, the phase equalization unit rotates the phase components of the signals on the respective carriers, in accordance with the plurality of reference phase values. A phase correction unit estimates an error in the phase component value of each of the plurality of signals on the respective carriers, based on a phase component of a pilot signal. Further, the phase correction unit rotates the phase component value of each of the plurality of signals on the respective subcarriers for a second time.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: February 19, 2008
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Katsuaki Hamamoto
  • Patent number: 7319712
    Abstract: An orthogonal code generation apparatus can generate a sequence of orthogonal codes without having to prestore orthogonal code sequences in a memory, by applying logic operation on a sequence number and a location number using AND circuits A0, A1, A2, A3, . . . , An and an adder circuit. A scrambling code generation apparatus computes only the values of registers involved with a feedback operation and a spreading operation, and loads respective values into the registers while shifting the shift register. When all the registers store valid values, scrambling codes are generated by a shift operation of the shift register.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: January 15, 2008
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Katsuaki Hamamoto
  • Publication number: 20070222647
    Abstract: An input unit inputs sequentially bit data, where the bit data is convolutionally coded by a generator matrix defined according to a constraint length and a coding rate and has the number of streams defined by the coding rate. A temporary decoded data shift register unit delays temporary decoded data over at least a period of time corresponding to the constraint length. A generation unit generates, per stream, bit data serving as candidates for a decoding, by performing exclusive OR based on the generator matrix on the delayed temporary decoded data and the inputted bit data. A comparator and a selector select any of the bit data per stream generated by the generation unit, as a decoding result, and outputs the selected decoding result.
    Type: Application
    Filed: March 23, 2007
    Publication date: September 27, 2007
    Inventor: Katsuaki Hamamoto
  • Publication number: 20070172000
    Abstract: A general purpose of the present invention includes providing a high-quality transmission in a multi-level modulation. Signal points to which symbols are to be assigned are not fixed and the positions of the signal points are varied for each transmission so as to reduce the symbols assigned only to the signal points having low error resilience. The assignment of bits in each symbol and an arrangement rule for the signal points in a QAM modulation scheme are varied per transmission so as to prevent any particular symbol from constantly exhibiting the low error resilience. The error rate is reduced and the throughput is enhanced.
    Type: Application
    Filed: December 27, 2006
    Publication date: July 26, 2007
    Inventors: Katsuaki Hamamoto, Sanshirou Shiina, Takeshi Sakamoto
  • Publication number: 20060067444
    Abstract: A derivation unit derives SNRs corresponding respectively to two repeated OFDM symbols having the same content. The derivation unit generates, from the derived SNRs, a control signal necessary for deriving weighting factors and then outputs this control signal as a combined control signal. An FFT unit performs FFT on a signal combined by a delay symbol synthesizing unit. An equalization unit performs equalization processing on subcarrier signals inputted from the FFT unit. While associating two weighting factors with OFDM symbols of the same content, a synthesis unit weights the OFDM symbols of the same content with the weighting factors and then combines the OFDM symbols of the same content among equalization data.
    Type: Application
    Filed: September 27, 2005
    Publication date: March 30, 2006
    Inventor: Katsuaki Hamamoto