Patents by Inventor Teppei Hirotsu

Teppei Hirotsu 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: 20210248395
    Abstract: image data captured from a traveling vehicle is considered, and it is not possible to reduce the transmission band of the image data. It is assumed that a radar 4 mounted in a traveling vehicle 10 detects a certain distant three-dimensional object at a time T in a direction of a distance d1 [m] and an angle ?1 . Since the vehicle 10 travels at a vehicle speed Y [km/h], it is predicted that a camera 3 is capable of capturing the distant three-dimensional object at a time (T+?T) and an angle ?1 or at a distance d2 [m]. Therefore, if a control unit 2 outputs a request to the camera 3 in advance, so as to cut out an image of the angle ?1 or the distance d2 [m] at the time (T+?T), when the time (T+?T) comes, the camera 3 transfers a whole image and a high-resolution image being a cutout image of only a partial image, to the control unit 2.
    Type: Application
    Filed: June 3, 2019
    Publication date: August 12, 2021
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tetsuya YAMADA, Teppei HIROTSU, Tomohito EBINA, Kazuyoshi SERIZAWA, Shouji MURAMATSU
  • Publication number: 20210221402
    Abstract: A prediction control device is realized which can respond to changes in the surrounding situations while the own vehicle is traveling and can perform a rapid operation during normal driving and in an emergency as if a person drives. The prediction control device includes a means (103, 104) for detecting a change amount and a change direction of surroundings and the own vehicle, and a means 105 for setting an initial value and a prediction period of a solution search calculation in a prediction control means based on the detection result. The means 105 for setting the initial value and the prediction period has a fail operational control mode in which the initial value and the prediction period set according to the change amount of the surroundings and the own vehicle is set with a previous calculation result of the solution search calculation to the initial value.
    Type: Application
    Filed: June 5, 2019
    Publication date: July 22, 2021
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Toshiaki NAKAMURA, Teppei HIROTSU, Hideyuki SAKAMOTO
  • Publication number: 20210200926
    Abstract: A circuit generation device that implements a standard function and a degeneration function has a first operation synthesis function of generating a circuit description based on a system operation description, there are provided a degenerate parameter extraction function of extracting a degenerate parameter from the operation description, a degeneration parameter change function of changing a value of the degeneration parameter, a second operation synthesis function of generating a degeneration circuit description based on the operation description and the degeneration parameter value, and a determination function of determining whether the performance of the degeneration circuit description satisfies a constraint condition based on the circuit description.
    Type: Application
    Filed: March 5, 2018
    Publication date: July 1, 2021
    Applicant: HITACHI, LTD.
    Inventors: Teruaki SAKATA, Teppei HIROTSU
  • Publication number: 20210109564
    Abstract: There is provided a technology capable of synchronizing a plurality of timers with a simple circuit configuration in an electronic control unit that controls a vehicle. An electronic control unit according to the present invention concatenates a second timer value as the most significant bit of a first timer value reset by a synchronization signal, and counts up the second timer value by the synchronization signal.
    Type: Application
    Filed: April 6, 2018
    Publication date: April 15, 2021
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Teppei HIROTSU, Hiroshi IWASAWA, Atsushi ARATA
  • Patent number: 10961935
    Abstract: A drive device capable of detecting individual variations of an injection quantity of a fuel injection device of each cylinder and adjusting a current waveform provided to an injection pulse width and a solenoid such that the individual variations of the fuel injection devices are reduced. The fuel injection device in the present invention includes a valve body that close a fuel passage by coming into contact with a valve seat and opens the fuel passage by separating from the valve seat and a magnetic circuit constructed of a solenoid, a fixed core, a nozzle holder a housing and a needle and when a current is supplied to the solenoid a magnetic suction force acts on the needle and the needle has a function to open the valve body by colliding against the valve body after performing a free running operation and changes of acceleration of the needle due to collision of the needle against the valve body are detected by a current flowing through the solenoid.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: March 30, 2021
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Ryo Kusakabe, Motoyuki Abe, Ayumu Hatanaka, Toshihiro Aono, Teppei Hirotsu, Hideyuki Sakamoto, Masahiro Toyohara, Osamu Mukaihara, Takao Fukuda, Yoshihito Yasukawa, Akiyasu Miyamoto
  • Patent number: 10962600
    Abstract: To carry out diagnosis of a current sensor while maintaining high reliability. An inverter control device according to the present invention controls an inverter circuit, calculates an estimated direct current value on the basis of a duty value and an alternating current sensor value output by an alternating current sensor, and performs diagnosis of a direct current sensor on the basis of the estimated direct current value and a direct current sensor value output by the direct current sensor.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: March 30, 2021
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Ryoichi Inada, Teppei Hirotsu, Satoru Shigeta
  • Patent number: 10955836
    Abstract: Provided is a method of detecting and preventing soft errors without performing multiplexing. As a result, it is possible to improve reliability of a device while suppressing an increase in mounting cost and reduction in operation speed accompanied with it. A diagnosis system includes an initial parameter generation unit which generates a plurality of initial parameters predicted on the basis of an external input; an operation unit which has a plurality of operators operating optimal solutions to the initial parameters by using an evaluation function describing a control object; and a diagnosis unit which diagnoses the operation unit on the basis of an output of the operation unit. When an optimal solution candidate giving an evaluation value deviating from a value taken by each evaluation value by a constant threshold or more among evaluation values corresponding to the optimal solutions to the initial parameters is found, the diagnosis unit diagnoses an error of the operation unit.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: March 23, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuya Horiguchi, Teppei Hirotsu, Hiroshi Iwasawa
  • Publication number: 20210053580
    Abstract: To provide an electronic control device generating low heat due to a simplified configuration and a reduced verification arithmetic load without multiplexing of sensors and calculations. A sensor fusion processing unit 4 that integrates a plurality of pieces of sensor information having been input from a plurality of first sensors 11 and second sensors 12, a behavior prediction processing unit 5 that obtains a surrounding object prediction map 8 in which a future behavior of a target object is predicted based on an own vehicle surrounding map 9 integrated by the sensor fusion processing unit 4, and a first comparison unit 102 that compares the surrounding object prediction map 8 predicted by the behavior prediction processing unit 5 with output information of each of the first sensors 11 and the second sensors 12 of the sensor fusion processing unit 4 at a predicted time are included.
    Type: Application
    Filed: December 14, 2018
    Publication date: February 25, 2021
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Tatsuya HORIGUCHI, Hideyuki SAKAMOTO, Teppei HIROTSU
  • Patent number: 10804891
    Abstract: An object of the present invention is to diagnose an abnormality detecting circuit that detects an abnormality, such as an overcurrent of a power semiconductor, with the number of insulating elements to be additionally provided, inhibited from increasing. There are provided: a drive circuit configured to output a gate signal to a power semiconductor; an abnormality detecting circuit configured to detect an abnormality of the power semiconductor; and a diagnosis signal applying circuit configured to apply a diagnosis signal to the abnormality detecting circuit. The diagnosis signal applying circuit applies the diagnosis signal, on the basis of the gate signal output by the drive circuit.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: October 13, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Ryoichi Inada, Teppei Hirotsu, Hideyuki Sakamoto, Kouichi Yahata, Keiji Kadota
  • Publication number: 20200301374
    Abstract: A prediction control device controls an actuator for automatic driving of a vehicle including: a command value generation unit generating an operation amount for the actuator and an operation amount candidate as a predicted value; an output prediction unit outputting a control amount candidate as a predicted value corresponding to the actuator output by using an operation model; an evaluation function calculation unit expressing constraint conditions for the automatic driving; a situation degree detection obtaining a measure of giving priority to ride comfort or giving priority to danger avoidance of an own vehicle while traveling; and a responsiveness adjusting unit obtaining a next operation amount candidate from the situation degree from the situation degree detection unit. The operation command value generation unit generates an operation amount for the actuator, and the responsiveness adjusting unit adjusts the output of the evaluation function according to the situation degree.
    Type: Application
    Filed: September 28, 2018
    Publication date: September 24, 2020
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Toshiaki NAKAMURA, Teppei HIROTSU, Tatsuya HORIGUCHI, Tadanobu TOBA, Hideyuki SAKAMOTO
  • Patent number: 10700741
    Abstract: A correct commutation is realized even if a communication error occurs due to a change in an actuator drive current. An electronic control unit that includes a communication section outputting a control signal and that can transmit the control signal to an actuator connected to the electronic control unit via a power line, includes an actuator operation detection section. When the actuator operation detection section detects an actuator operation, the communication section retransmits the control signal at timing of detecting the actuator operation.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: June 30, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hiroki Yamashita, Taizo Yamawaki, Hidehiro Toyoda, Teppei Hirotsu, Ryosuke Ishida, Hirofumi Kurimoto, Kenichi Hoshino
  • Publication number: 20200070847
    Abstract: An electronic control device for a vehicle according to the present invention includes an action prediction unit that predicts the action of an object around the vehicle on the basis of external information acquired from external information detection units that detect external information of the vehicle, and a determination unit for a detection unit that determines whether an abnormality has occurred in the external information detection unit by comparing external information acquired from the external information detection unit at the time corresponding to a prediction result of the action prediction unit to the prediction result of the action prediction unit.
    Type: Application
    Filed: March 8, 2018
    Publication date: March 5, 2020
    Inventors: Tatsuya HORIGUCHI, Hideyuki SAKAMOTO, Teppei HIROTSU
  • Publication number: 20200059264
    Abstract: A correct commutation is realized even if a communication error occurs due to a change in an actuator drive current. An electronic control unit that includes a communication section outputting a control signal and that can transmit the control signal to an actuator connected to the electronic control unit via a power line, includes an actuator operation detection section. When the actuator operation detection section detects an actuator operation, the communication section retransmits the control signal at timing of detecting the actuator operation.
    Type: Application
    Filed: July 6, 2017
    Publication date: February 20, 2020
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hiroki YAMASHITA, Taizo YAMAWAKI, Hidehiro TOYODA, Teppei HIROTSU, Ryosuke ISHIDA, Hirofumi KURIMOTO, Kenichi HOSHINO
  • Publication number: 20200050164
    Abstract: In the invention, a problem is solved in which, in order to achieve high performance and high reliability with the conventional multi-core and lockstep core, a redundant lockstep core is necessarily prepared to execute a multi-core program in which an error has occurred, a circuit area increases, and a cost and a power consumption increase. In the invention, a safe operation of a control system is secured by operating a software program operating on a multi-core in which an error has occurred as degenerate software on a core switched from a lockstep operation to a multi-core operation.
    Type: Application
    Filed: April 25, 2017
    Publication date: February 13, 2020
    Applicant: HITACHI, LTD.
    Inventors: Teruaki SAKATA, Teppei HIROTSU
  • Publication number: 20200023854
    Abstract: An object of the present invention is to enhance the reliability of an autonomous driving system. The autonomous driving system includes: a higher-level control device 1 that outputs a control target value of an actuator group based on an action plan of a vehicle; and a lower-level control device 2 that controls the actuator group of the vehicle based on a command from the higher-level control device 1. The lower-level control device 2 holds the control target value of the vehicle provided by the higher-level control device 1 over a specific period. When the higher-level control device 1 does not satisfy a desired function, the lower-level control device 2 is configured to be controlled based on the held control target value. The action plan is followed by determining and correcting a difference between an actual action value and the control target value of the vehicle.
    Type: Application
    Filed: March 15, 2018
    Publication date: January 23, 2020
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Tatsuya HORIGUCHI, Teppei HIROTSU, Hideyuki SAKAMOTO, Ryohichi INADA
  • Publication number: 20190376799
    Abstract: There is achieved an electronic control device capable of calculating an optimal travel plan even during dynamic reconfiguration of a calculation circuit configuration. When a driving state changes, a travel plan parameter generation/selection unit divides evaluation calculation units into two blocks and performs reconfiguration of the respective evaluation calculation units a plurality of times via a reconfiguration control unit. While the evaluation calculation units are reconfigured, the evaluation calculation units performs evaluation calculation, and while the evaluation calculation units are reconfigured, the evaluation calculation units perform evaluation calculation. Thus, even while some of the evaluation calculation units are being reconfigured, it is possible to continue evaluation of the travel plan in the rest of the evaluation calculation units.
    Type: Application
    Filed: October 26, 2017
    Publication date: December 12, 2019
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Ryoichi INADA, Tatsuya HORIGUCHI, Teppei HIROTSU, Hideyuki SAKAMOTO
  • Patent number: 10498395
    Abstract: A power line communication apparatus includes a drive block including an actuator control circuit and a drive circuit and a communication block. The actuator control circuit generates a control pulse for controlling an actuator, and controls a transition timing of the control pulse during an operation period set within a communication cycle by a communication clock. The drive circuit controls a driving current of the actuator supplied from a DC power source through a power line based on the control pulse in which the transition timing is controlled. The communication block generates the communication clock, and modulates a current flowing through the power line in response to data to be transmitted during a signal transmission period different from the operation period, set within the communication cycle.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: December 3, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Hiroki Yamashita, Taizo Yamawaki, Ming Liu, Teppei Hirotsu, Ryosuke Ishida, Hirofumi Kurimoto
  • Publication number: 20190325311
    Abstract: The present invention addresses the problem of implementing a neural network using a small-scale circuit by simplifying the multiplication of the input data by weight data. The neural network circuit according to the present invention is configured from: a means for multiplying input data by a rounded value of the mantissa part of weight data; a means for shifting the multiplication result by the number of bits of the rounded value; a means for adding the shifted result to the original input data; and a means for shifting the addition result by the number of bits of the exponent part of the weight.
    Type: Application
    Filed: January 10, 2017
    Publication date: October 24, 2019
    Applicant: Hitachi, Ltd.
    Inventors: Toshiaki NAKAMURA, Teppei HIROTSU, Tatsuya HORIGUCHI
  • Publication number: 20190319834
    Abstract: The present invention provides an electronic controller and the like capable of identifying the order of communication apparatuses connected to a bus while minimizing manufacturing cost. In the present invention, bus wiring 2 has one end connected to a port 111 and the other end connected to a port 112. A plurality of lower ECUs 301 to 304 are connected to the bus wiring 2. A current sensor CS measures current Is1 flowing through the port 111 and current Is2 flowing through the port 112 by applying current to the bus wiring 2 from each of the plurality of lower ECUs 301 to 304. The higher controller 12 identifies the order of the plurality of lower ECUs 301 to 304 on the bus wiring 2 on the basis of the current Is1 and the current Is2 which are measured for each of the plurality of lower ECUs 301 to 304.
    Type: Application
    Filed: October 24, 2017
    Publication date: October 17, 2019
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hiroshi IWASAWA, Teppei HIROTSU, Mitsuhiko WATANABE
  • Publication number: 20190300009
    Abstract: A vehicle control device capable of improving safety, even when abnormality in the operation of an arithmetic processing unit occurs. A second microcomputer receives trajectory information transmitted from a first microcomputer via a communication line and calculates control commands to actuators to synchronize the arithmetic processing unit allowing the first and second microcomputers to be synchronized. The second microcomputer performs a calculation and compares the result with the calculation result of the first microcomputer so that the second microcomputer can accurately determine whether or not the first microcomputer is abnormal. When the abnormality occurs in the first microcomputer based on the determination, the actuators are controlled by switching to the control commands calculated by the second microcomputer which is synchronized with the arithmetic processing unit. Thus, the device performs seamless self-driving control without the occurrence of abrupt control gaps.
    Type: Application
    Filed: October 31, 2017
    Publication date: October 3, 2019
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hideyuki SAKAMOTO, Teppei HIROTSU, Satoshi TSUTSUMI, Taisuke UETA