Patents by Inventor Yuhei Yamaguchi
Yuhei Yamaguchi 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).
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Patent number: 11971721Abstract: To effectively enhance the operation efficiency of an autonomous mobile robot, an autonomous mobile robot control system includes a processor and a plurality of environmental cameras. The processor estimates a moving route of each of a plurality of moving bodies on the basis of characteristics of each of the plurality of moving bodies and sets a subset of the plurality of moving bodies whose moving routes overlap among the detected moving bodies as avoidance processing target moving bodies. The processor generates an avoidance procedure for the avoidance processing target moving bodies so the motion of the avoidance processing target moving bodies does not interfere with the motion of other avoidance target moving bodies.Type: GrantFiled: August 3, 2021Date of Patent: April 30, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohisa Takai, Yuhei Yamaguchi, Satoshi Toyoshima, Yuta Watanabe, Tetsuya Taira, Mikio Honda, Shiro Oda, Nobuhisa Otsuki
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Patent number: 11929531Abstract: A substrate for a composite membrane includes a microporous polyolefin membrane for carrying a hydrophilic resin compound within the pores of the microporous membrane wherein: the average pore diameter is 1 nm to 50 nm; the porosity is 50% to 78%; the membrane thickness is 1 ?m to 12 ?m; and, when a mixed solution of ethanol and water (volume ratio 1/2) is dripped onto a surface of the microporous polyolefin membrane which has not undergone hydrophilization treatment, the contact angle ?1 between the droplet and the surface is 0 to 90 degrees 1 second after the dripping, and the contact angle ?2 between the droplet and the surface is 0 to 70 degrees 10 minutes after the dripping, and the rate of change of the contact angle ((?1??2)/?1×100) is 10 to 50%.Type: GrantFiled: March 15, 2022Date of Patent: March 12, 2024Assignee: TEIJIN LIMITEDInventors: Takeo Yamaguchi, Yuhei Oshiba, Hidenori Ohashi, Jin Tomatsu, Koji Furuya, Takao Ohno, Mami Nanbu
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Patent number: 11916454Abstract: A stator includes a stator core that includes a core back portion having an annular shape and with a central axis as a center and tooth portions extending from the core back portion to an inside in a radial direction and arranged in a circumferential direction, insulators that are attached to the tooth portions from the inside in the radial direction, a coil that is wound around the insulator, and a cover that supports an inner surface of the insulator opposing the inside in the radial direction from the inside in the radial direction.Type: GrantFiled: February 4, 2022Date of Patent: February 27, 2024Assignee: NIDEC CORPORATIONInventors: Tatsuro Kawamoto, Yuhei Yamaguchi, Yoshiaki Yamashita
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Patent number: 11899486Abstract: A current mode control type switching power supply device includes a first switch having a first terminal connected to a first application terminal to which an input voltage is applied, and a second switch having a first terminal connected to a second terminal of the first switch and a second terminal connected to a second application terminal to which a predetermined voltage lower than the input voltage is applied. A current sensor is configured to sense current flowing in the second switch. A controller configured to control the first switch and the second switch, wherein the controller is configured to control the first switch and the second switch independently of a difference between the input voltage and an output voltage and in addition in accordance with the current sensed by the current sensor.Type: GrantFiled: February 23, 2022Date of Patent: February 13, 2024Assignee: Rohm Co., Ltd.Inventor: Yuhei Yamaguchi
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Patent number: 11881747Abstract: A motor includes a rotor configured to rotate about a central axis extending in an up-down direction, a stator located radially outside the rotor, a bracket located above the stator, a circuit board held by the bracket and disposed along a plane perpendicular to an axial direction, and a bus bar held by the bracket and connected to the circuit board at a terminal connection portion. The bracket includes a board support portion supporting the circuit board from below, and a wall portion protruding upward to be higher than the board support portion and surrounding the circuit board. The wall portion has a cutout portion extending downward from an upper end of the wall portion.Type: GrantFiled: September 26, 2019Date of Patent: January 23, 2024Assignee: NIDEC CORPORATIONInventors: Yuhei Yamaguchi, Takayuki Makino, Keigo Nakamura, Hisashi Fujihara
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Publication number: 20230406244Abstract: A linear power supply circuit according to the present invention is provided with: an output transistor provided between an input end to which an input voltage is applied and an output end to which an output voltage is applied; and a driver for driving the output transistor on the basis of the difference between a voltage based on the output voltage and a reference voltage. The driver is provided with: a differential amplifier for outputting a voltage according to the difference between the voltage based on the output voltage and the reference voltage; a capacitor one end of which has an output of the differential amplifier applied thereto and the other end of which has the voltage based on the output voltage applied thereto; a converter for converting a voltage based on the output of the differential amplifier into an electrical current and outputting the electrical current; and an electrical current amplifier for amplifying the electrical current of the output of the converter.Type: ApplicationFiled: September 1, 2023Publication date: December 21, 2023Inventors: Isao Takobe, Yuhei Yamaguchi, Tetsuo Tateishi, Takeshi Nagata
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Patent number: 11848611Abstract: A switching power supply device includes first to fourth switches sequentially connected in series, an inductor, a first capacitor whose first end is connected to a connection node of the first switch and the second switch and whose second end is connected to a connection node of the third switch, the fourth switch, and the inductor, a second capacitor whose first end is connected to a connection node of the second switch and the third switch, and a controller that controls switching on and off of the first to fourth switches. In at least one of a first pair configured with the first switch and the third switch and a second pair configured with the second switch and the fourth switch, the controller shifts a timing of switching from off to on between two switches.Type: GrantFiled: June 2, 2022Date of Patent: December 19, 2023Assignee: ROHM CO., LTD.Inventors: Akihiro Kawano, Yuhei Yamaguchi
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Patent number: 11822314Abstract: A conveyance control system according to the present disclosure is a conveyance control system configured to control a conveyance robot to autonomously move and convey a conveyance object to a destination, the conveyance control system including: a reception unit configured to receive, from a scheduled recipient of the conveyance object, a request signal for requesting a third party to collect the conveyance object halfway through conveyance of the conveyance object; and an issuance unit configured to issue, to a terminal of the third party, a temporary electronic key for enabling the conveyance object to be taken out from the conveyance robot based on a set condition when the reception unit receives the request signal.Type: GrantFiled: November 13, 2020Date of Patent: November 21, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohisa Takai, Yuhei Yamaguchi, Satoshi Toyoshima, Yuta Watanabe, Mikio Honda, Shiro Oda, Tetsuya Taira, Nobuhisa Otsuki
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Patent number: 11815883Abstract: A conveyance system includes a plurality of conveyance robots, a storage unit, a stability information acquisition unit, a selection unit, and a system controller, which serves as a controller. The plurality of conveyance robots convey a wagon that accommodates a conveyed object. The storage unit stores robot information regarding features that the plurality of respective conveyance robots include. The stability information acquisition unit acquires stability information regarding stability when the conveyed object is conveyed. The selection unit selects one of the plurality of conveyance robots based on the robot information and the stability information that have been acquired. The system controller instructs the one conveyance robot that has been selected to convey the conveyed object.Type: GrantFiled: November 12, 2020Date of Patent: November 14, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohisa Takai, Yuhei Yamaguchi, Satoshi Toyoshima, Yuta Watanabe, Tetsuya Taira, Mikio Honda, Shiro Oda, Nobuhisa Otsuki
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Patent number: 11772586Abstract: A linear power supply circuit according to the present invention is provided with: an output transistor provided between an input end to which an input voltage is applied and an output end to which an output voltage is applied; and a driver for driving the output transistor on the basis of the difference between a voltage based on the output voltage and a reference voltage. The driver is provided with: a differential amplifier for outputting a voltage according to the difference between the voltage based on the output voltage and the reference voltage; a capacitor one end of which has an output of the differential amplifier applied thereto and the other end of which has the voltage based on the output voltage applied thereto; a converter for converting a voltage based on the output of the differential amplifier into an electrical current and outputting the electrical current; and an electrical current amplifier for amplifying the electrical current of the output of the converter.Type: GrantFiled: April 20, 2022Date of Patent: October 3, 2023Assignee: Rohm Co., Ltd.Inventors: Isao Takobe, Yuhei Yamaguchi, Tetsuo Tateishi, Takeshi Nagata
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Publication number: 20230198397Abstract: A switching power supply device includes first and second switches connected in series between an application terminal for an input voltage and an application terminal for a voltage lower than the input voltage, and a controller configured to turn on and off the first and second switches. The controller has a first state where it keeps the first switch on and the second switch off, followed by a second state where it keeps the first switch off and the second switch on, followed by a third state where it keeps the first and second switches off, followed by a fourth state where it keeps the voltage at the connection node between the first and second switches lower than in the third state. The controller repeats the first, second, third, and fourth states at a fixed cycle.Type: ApplicationFiled: May 28, 2021Publication date: June 22, 2023Inventors: Shingo Hashiguchi, Isao Takobe, Kosuke Sato, Yuhei Yamaguchi
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Patent number: 11656621Abstract: The present disclosure provides a conveyance control system and the like that enable a scheduled recipient of a conveyance object to reliably receive the conveyance object even when a destination of a conveyance robot is changed for any reason. The conveyance control system is a conveyance control system configured to control a conveyance robot to autonomously move and convey a conveyance object to a destination, including: a change unit configured to change the destination after the conveyance robot starts conveying the conveyance object; and a notification unit configured to notify an information terminal of a scheduled recipient of the conveyance object about destination information regarding the destination that has been changed by the change unit.Type: GrantFiled: November 12, 2020Date of Patent: May 23, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohisa Takai, Yuhei Yamaguchi, Satoshi Toyoshima, Yuta Watanabe, Mikio Honda, Shiro Oda, Tetsuya Taira, Nobuhisa Otsuki
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Patent number: 11657634Abstract: A control system controls an operation mode of a mobile robot that autonomously moves in a predetermined area, and includes a feature detection unit, a classifying unit, and a system controller. The feature detection unit detects features of a person who is present in the vicinity of the mobile robot. The classifying unit classifies the person into a predetermined first group or a predetermined second group based on the features. The system controller selects a first operation mode when the person who belongs to the first group is present in the vicinity of the mobile robot and selects a second operation mode that is different from the first operation mode when the person who belongs to the first group is not present in the vicinity of the mobile robot, thereby controlling the mobile robot.Type: GrantFiled: November 12, 2020Date of Patent: May 23, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohisa Takai, Yuhei Yamaguchi, Satoshi Toyoshima, Yuta Watanabe, Tetsuya Taira, Mikio Honda, Shiro Oda, Nobuhisa Otsuki
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Publication number: 20230148873Abstract: A physiological state index calculation system, a physiological state index calculation method, and a non-transitory computer readable medium for capturing subtle changes in a physiological state of a living body are provided. The physiological state index calculation system includes a band-pass filter that filters cerebral blood flow waveform information obtained from a cerebral blood flow of a living body in at least one frequency band, and a complex number conversion unit configured to convert the filtered cerebral blood flow waveform information into a complex number for at least one frequency band. The cerebral blood flow waveform information converted into a complex number by the complex number conversion unit is an oscillator that reflects a physiological state of a living body.Type: ApplicationFiled: October 20, 2022Publication date: May 18, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keiji HAYASHI, Hitoshi YAMADA, Yuhei YAMAGUCHI, Chie IMAMURA
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Patent number: 11607812Abstract: A conveyance control system according to the present disclosure is a conveyance control system configured to control a conveyance robot to autonomously move and convey a conveyance object to a destination, including: a reception unit configured to receive, from a scheduled recipient of the conveyance object, an instruction that the conveyance object is to be collected halfway through conveyance of the conveyance object; and an execution unit configured to execute a predetermined process for enabling collection of the conveyance object halfway through conveyance of the conveyance object when the reception unit receives the instruction.Type: GrantFiled: November 19, 2020Date of Patent: March 21, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohisa Takai, Yuhei Yamaguchi, Satoshi Toyoshima, Yuta Watanabe, Mikio Honda, Shiro Oda, Tetsuya Taira, Nobuhisa Otsuki
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Patent number: 11584017Abstract: The present disclosure provides a conveyance system and the like capable of preferably conveying a conveyed object in accordance with a state of the conveyed object. The conveyance system includes a conveyance robot, a drive controller, which is a controller, an image data acquisition unit, and a setting unit. The conveyance robot conveys the conveyed object. The drive controller controls an operation of the conveyance robot. The image data acquisition unit acquires image data obtained by capturing images of the conveyed object. The setting unit sets an operation parameter of the conveyance robot in the drive controller based on the acquired image data.Type: GrantFiled: November 13, 2020Date of Patent: February 21, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohisa Takai, Yuhei Yamaguchi, Satoshi Toyoshima, Yuta Watanabe, Tetsuya Taira, Mikio Honda, Shiro Oda, Nobuhisa Otsuki
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Patent number: 11588367Abstract: Provided is a motor including: a rotor, a stator, a first and second bearing, a support member, a housing including a first flat part and a cylindrical part, and a bearing holder. The cylindrical part includes: a first inner circumferential surface inside which is provided the stator; a second inner circumferential surface, a distance from the second inner circumferential surface to a central axis being greater than a distance from the first inner circumferential surface to the central axis, and the second inner circumferential surface contacting an outer circumferential surface of the bearing holder; and a stepped surface, connecting the first and the second inner circumferential surfaces, and contacting a lower surface of the bearing holder. The housing further includes a riveting part located on the second inner circumferential surface of the cylindrical part and fixing the bearing holder to the second inner circumferential surface of the cylindrical part.Type: GrantFiled: May 25, 2021Date of Patent: February 21, 2023Assignee: NIDEC CORPORATIONInventors: Quang Danh Ho, Yuhei Yamaguchi
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Patent number: 11567521Abstract: A linear power supply circuit, includes: output transistor between input terminal where input voltage is applied and output terminal where output voltage is applied; a driver driving the output transistor based on difference between voltage based on the output voltage and reference voltage; and phase compensation circuit, wherein the driver includes differential amplifier outputting voltage corresponding to the difference between the voltage based on the output voltage and the reference voltage, a first capacitance having one end where output of the differential amplifier is applied and the other end where ground potential is applied, a converter converting the voltage based on the output of the differential amplifier into current, and a current amplifier amplifying the current output from the converter, and wherein the phase compensation circuit lowers gain of transfer function of the linear power supply circuit and output capacitor connected to the output terminal.Type: GrantFiled: November 18, 2021Date of Patent: January 31, 2023Assignee: Rohm Co., Ltd.Inventors: Takeshi Nagata, Isao Takobe, Yuhei Yamaguchi
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Publication number: 20230013839Abstract: A pulse control device 10 comprises: a switch output unit 100 which generates a pulse output voltage Vo from a direct-current input voltage Vi and supplies the pulse output voltage Vo to a load (such as a relay coil 21 of a mechanical relay 20); a low-pass filter unit 300 which receives a feedback input of the pulse output voltage Vo and generates a feedback voltage Vfb; and an output feedback control unit 200 which receives an input of the feedback voltage Vfb and controls the switch output unit 100 so that an average value of the pulse output voltage Vo becomes constant. The low-pass filter unit 300 may be configured without a coil.Type: ApplicationFiled: September 16, 2022Publication date: January 19, 2023Inventors: Hiroto OSHITA, Tetsuo Tateishi, Yosuke Fukumoto, Yuhei Yamaguchi, Yoju IMAMURA, Genki Tsuruyama
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Patent number: 11550332Abstract: An autonomous moving apparatus control system including a range sensor, a reflection plate, and a control unit. The range sensor is installed in a cage of an elevator and detects a distance to an object by receiving reflected light of signal light applied to the object. The reflection plate is disposed in an elevator hall of a floor on which the elevator stops, and reflects the signal light. The control unit determines whether or not a mobile robot, which is an autonomous moving apparatus, can get on and off the elevator based on a detected distance, the detected distance being a distance to the reflection plate detected by the range sensor.Type: GrantFiled: April 1, 2020Date of Patent: January 10, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohisa Takai, Yuhei Yamaguchi, Satoshi Toyoshima, Yuta Watanabe, Mikio Honda, Shiro Oda, Tetsuya Taira, Nobuhisa Otsuki