Patents by Inventor Makoto Tokumaru

Makoto Tokumaru 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: 20240181889
    Abstract: A spinning and sliding detection device in a train includes: a change detection unit that periodically acquires a first detected value from a speed sensor, calculates a first change amount, using the first detected values, periodically acquires a second detected value from an acceleration sensor, calculates a second change amount, using the second detected values, and selects a change mode from a plurality of change modes defined for determining whether spinning or sliding has occurred at the train, using the first change amount, the second change amount, a first threshold, and a second threshold and outputs the selected change mode; and a spinning and sliding determination unit that determines whether spinning or sliding has occurred at the train and determines whether a failure has occurred in either the speed sensor or the acceleration sensor, based on the change mode acquired from the change detection unit.
    Type: Application
    Filed: May 25, 2021
    Publication date: June 6, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akira NAKANISHI, Satoru MATSUOKA, Koji SHIRATSUCHI, Masashi ASUKA, Makoto TOKUMARU
  • Patent number: 11987275
    Abstract: A train control system includes: an image information conversion device that is mounted on a train and outputs first image information obtained by adding train information to image information imaged by an imaging device capable of capturing an area in front of the train; and an obstacle detection device that is installed on the ground and includes: an image information storage unit that records the first image information output from the image information conversion device; an image information comparison unit that compares the first image information with second image information recorded in the image information storage unit; and an image information result output unit that outputs a result from the image information comparison unit.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: May 21, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Makoto Tokumaru
  • Publication number: 20240067239
    Abstract: A train control device (20) to be installed on a train (10) includes an acquisition unit (21) that obtains first pulses from a velocity sensor (31) for detecting the first pulses generated on a first axle of the train (10) and obtains second pulses from a velocity sensor (32) for detecting the second pulses generated on a second axle of the train (10), a storage unit (22) that stores the first pulses and the second pulses, and a control unit (23) that determines occurrence or non-occurrence of a slip or a slide of the train (10) based on a pulse ratio, where the pulse ratio is a ratio between a number of first pulses detected during a time period in which the train (10) traveled a given distance among the first pulses, and a number of second pulses detected during a time period in which the train (10) traveled the given distance among the second pulses.
    Type: Application
    Filed: January 14, 2021
    Publication date: February 29, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masashi ASUKA, Makoto TOKUMARU, Mototsugu KOZAKI, Akira NAKANISHI
  • Publication number: 20240067241
    Abstract: A train control device includes: a control unit that calculates a control speed of the train at a current position with respect to a target speed at a target position of the train, by using a travel distance from the current position to the target position of the train, an altitude difference between the current position and the target position, a braking force of a brake device of the train, first potential energy including an influence of an altitude difference based on a gradient of the track in a section from a head position to a tail position of the train at the current position, and second potential energy including an influence of an altitude difference based on a gradient of the track in a section from a head position to a tail position of the train at the target position.
    Type: Application
    Filed: January 20, 2021
    Publication date: February 29, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masashi ASUKA, Makoto TOKUMARU, Mototsugu KOZAKI, Akira NAKANISHI
  • Publication number: 20240003937
    Abstract: An on-board control device includes a communication unit that is communicable with a tachometer, a pick-up coil, an acceleration sensor a detection axis of which is provided along a traveling direction of the train, and a master controller, a storage unit that stores information regarding a gradient value at each position on a train line where the train travels, and a control unit that specifies a train position by using information acquired from the pick-up coil and the tachometer, determines a traveling state from information acquired from the master controller, and when the train coasts or is stopped, diagnoses soundness of the acceleration sensor based on a comparison result obtained by comparing a first acceleration of the train output from the acceleration sensor with a second acceleration in the traveling direction calculated by using a gravity acceleration and a gradient value at the train position.
    Type: Application
    Filed: November 24, 2020
    Publication date: January 4, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Makoto TOKUMARU, Satoru MATSUOKA, Koji SHIRATSUCHI
  • Patent number: 11634037
    Abstract: A train operation control apparatus mounted on a train includes: a non-contact range sensor that measures a first train interval between a rear end of a preceding train traveling ahead of the train and a head of the train; another non-contact range sensor that measures a second train interval between a head of a following train traveling behind the train and a rear end of the train; and on-board control transmission apparatus that, when being instructed to start control using the second train interval, controls operation of the train using the second train interval on the basis of an instruction from an operation management apparatus that controls operation of a plurality of trains including the train, the preceding train, and the following train.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: April 25, 2023
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Makoto Tokumaru
  • Patent number: 11548540
    Abstract: The present invention includes an on-board control apparatus that generates train position information using ground coil position information and train speed information and outputs the train position information, and a ground control apparatus that receives the train position information outputted by the on-board control apparatus, identifies a position of a train using the train position information and stored track information, generates train control data having a size corresponding to the identified position of the train, and outputs the train control data toward the train.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: January 10, 2023
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Makoto Tokumaru
  • Patent number: 11458999
    Abstract: A platform-door control system includes an on-board control apparatus provided in a train, and a platform-door control apparatus. The on-board control apparatus includes: a ground-coil information storage unit to store information on a ground coil located on a track on which the train runs; a train-position detection unit to detect a position of the train; a train stop-position specification unit to determine a train stop position on the basis of stored information on the ground coil, and train position information detected by the train-position detection unit; a vehicle-door specification unit to determine a vehicle door of the train to be opened/closed, on the basis of the determined train stop position; and a vehicle-door information output unit to output determined vehicle door information of the train. The platform-door control apparatus receives the vehicle door information output from the vehicle-door information output unit, and controls platform doors installed at a station.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: October 4, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Makoto Tokumaru
  • Patent number: 11433933
    Abstract: A ground base device includes a schedule timetable storage unit storing a received schedule timetable periodically transmitted from the central control device; a departure-obstructed condition determination unit determining whether a departure-obstructed condition of a train is resolved and outputting departure-obstructed condition cancel signal when the departure-obstructed condition is resolved; a departure time control unit outputting departure-time appropriate signal when current time is departure time based on the schedule timetable upon receiving the departure-obstructed condition cancel signal; a departure interval control unit outputting departure-interval appropriate signal when intervals between the train and preceding and following trains are a threshold value or more upon receiving the departure-time appropriate signal; and a departure instruction signal output unit outputting a departure instruction signal upon receiving the departure-interval appropriate signal, and, when the central control dev
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: September 6, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Makoto Tokumaru
  • Publication number: 20220081015
    Abstract: An on-board apparatus to be installed on a train, the apparatus including; an on-board control device that controls running and stopping of the train during operation of the train; and an on-board wireless device that performs wireless communication with a ground apparatus, and starts the on-board control device when receiving a first signal from the ground apparatus while the train is staying overnight, the first signal notifying that the train moves, wherein while the train is staying overnight, the on-board control device is started under the control of the on-board wireless device, and performs control so as to stop the train.
    Type: Application
    Filed: January 30, 2019
    Publication date: March 17, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventor: Makoto TOKUMARU
  • Patent number: 11198458
    Abstract: A speed control device that controls a speed of a train using a tacho-generator includes a calculating unit that calculates, when a pulse count signal obtained by conversion from an AC voltage signal that is outputted from the tacho-generator and corresponds to a rotating speed of a wheel of the train cannot be detected, a first speed using notch information, route data, and car characteristic data and calculates, when the pulse count signal can be detected, a second speed using the pulse count signal. The speed control device includes a position calculating unit that calculates a position of the train using the speed calculated by the calculating unit.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: December 14, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Makoto Tokumaru, Satoshi Nakamura
  • Publication number: 20210139053
    Abstract: A platform-door control system includes an on-board control apparatus provided in a train, and a platform-door control apparatus. The on-board control apparatus includes: a ground-coil information storage unit to store information on a ground coil located on a track on which the train runs; a train-position detection unit to detect a position of the train; a train stop-position specification unit to determine a train stop position on the basis of stored information on the ground coil, and train position information detected by the train-position detection unit; a vehicle-door specification unit to determine a vehicle door of the train to be opened/closed, on the basis of the determined train stop position; and a vehicle-door information output unit to output determined vehicle door information of the train. The platform-door control apparatus receives the vehicle door information output from the vehicle-door information output unit, and controls platform doors installed at a station.
    Type: Application
    Filed: March 22, 2017
    Publication date: May 13, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventor: Makoto TOKUMARU
  • Patent number: 10953901
    Abstract: A train operation control system includes: a headcount estimation device that estimates the number of people in a train and the number of people on a platform by using video data outputted from a plurality of on-board cameras and a plurality of ground cameras; and a train rescheduling device that predicts a dwell time required for passengers to board and detrain from the train using the estimated headcount information estimated by the headcount estimation device and schedule information stored in an operation management device, and accordingly performs train operation rescheduling. The train operation control system can predict the dwell time accurately and accordingly perform train operation rescheduling even when the number of passengers fluctuates.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: March 23, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Makoto Tokumaru
  • Publication number: 20200377133
    Abstract: A train control system includes: an image information conversion device that is mounted on a train and outputs first image information obtained by adding train information to image information imaged by an imaging device capable of capturing an area in front of the train; and an obstacle detection device that is installed on the ground and includes: an image information storage unit that records the first image information output from the image information conversion device; an image information comparison unit that compares the first image information with second image information recorded in the image information storage unit; and an image information result output unit that outputs a result from the image information comparison unit.
    Type: Application
    Filed: January 12, 2018
    Publication date: December 3, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventor: Makoto TOKUMARU
  • Patent number: 10829097
    Abstract: A speed control device includes: a first calculation unit to calculate first location information and first speed information from output of a speed generator; a second calculation unit to calculate second location information and second speed information from output of a speed sensor; a route database storage unit to store information to select one of a calculation result of the first calculation unit and a calculation result of the second calculation unit in accordance with a location of a vehicle; and a selection unit to select one of the calculation results on the basis of the information of the route database storage unit to output the information as location information and speed information, in which speed of the vehicle is determined on the basis of the location information and speed information.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: November 10, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Makoto Tokumaru
  • Publication number: 20200262300
    Abstract: A train operation control apparatus mounted on a train includes: a non-contact range sensor that measures a first train interval between a rear end of a preceding train traveling ahead of the train and a head of the train; another non-contact range sensor that measures a second train interval between a head of a following train traveling behind the train and a rear end of the train; and on-board control transmission apparatus that, when being instructed to start control using the second train interval, controls operation of the train using the second train interval on the basis of an instruction from an operation management apparatus that controls operation of a plurality of trains including the train, the preceding train, and the following train.
    Type: Application
    Filed: November 15, 2017
    Publication date: August 20, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventor: Makoto TOKUMARU
  • Publication number: 20190359236
    Abstract: A speed control device that controls a speed of a train using a tacho-generator includes a calculating unit that calculates, when a pulse count signal obtained by conversion from an AC voltage signal that is outputted from the tacho-generator and corresponds to a rotating speed of a wheel of the train cannot be detected, a first speed using notch information, route data, and car characteristic data and calculates, when the pulse count signal can be detected, a second speed using the pulse count signal. The speed control device includes a position calculating unit that calculates a position of the train using the speed calculated by the calculating unit.
    Type: Application
    Filed: February 22, 2016
    Publication date: November 28, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Makoto TOKUMARU, Satoshi NAKAMURA
  • Publication number: 20190315382
    Abstract: The present invention includes an on-board control apparatus that generates train position information using ground coil position information and train speed information and outputs the train position information, and a ground control apparatus that receives the train position information outputted by the on-board control apparatus, identifies a position of a train using the train position information and stored track information, generates train control data having a size corresponding to the identified position of the train, and outputs the train control data toward the train.
    Type: Application
    Filed: December 13, 2016
    Publication date: October 17, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventor: Makoto TOKUMARU
  • Publication number: 20190168789
    Abstract: A ground base device includes a schedule timetable storage unit storing a received schedule timetable periodically transmitted from the central control device; a departure-obstructed condition determination unit determining whether a departure-obstructed condition of a train is resolved and outputting departure-obstructed condition cancel signal when the departure-obstructed condition is resolved; a departure time control unit outputting departure-time appropriate signal when current time is departure time based on the schedule timetable upon receiving the departure-obstructed condition cancel signal; a departure interval control unit outputting departure-interval appropriate signal when intervals between the train and preceding and following trains are a threshold value or more upon receiving the departure-time appropriate signal; and a departure instruction signal output unit outputting a departure instruction signal upon receiving the departure-interval appropriate signal, and, when the central control dev
    Type: Application
    Filed: August 4, 2016
    Publication date: June 6, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventor: Makoto TOKUMARU
  • Publication number: 20190100174
    Abstract: A speed control device includes: a first calculation unit to calculate first location information and first speed information from output of a speed generator; a second calculation unit to calculate second location information and second speed information from output of a speed sensor; a route database storage unit to store information to select one of a calculation result of the first calculation unit and a calculation result of the second calculation unit in accordance with a location of a vehicle; and a selection unit to select one of the calculation results on the basis of the information of the route database storage unit to output the information as location information and speed information, in which speed of the vehicle is determined on the basis of the location information and speed information.
    Type: Application
    Filed: September 14, 2015
    Publication date: April 4, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventor: Makoto TOKUMARU