Patents by Inventor Hiroki Nagai
Hiroki Nagai 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: 11967137Abstract: According to one embodiment, a method, computer system, and computer program product for object detection. The embodiment may include receiving an annotated image dataset comprising rectangles which surround objects to be detected and labels which specify a class to which an object belongs. The embodiment may include calculating areas of high and low probability of rectangle distribution for each class of objects within images of the dataset. The embodiment may include applying a correction factor to confidence values of object prediction results, obtained during validation of a trained object detection (OD) model, depending on a class label and a rectangle location of an object prediction result and calculating an accuracy of the trained OD model. The embodiment may include increasing the correction factor and re-calculating the accuracy of the trained OD model with every increase. The embodiment may include selecting an optimal correction factor which yields a highest accuracy.Type: GrantFiled: December 2, 2021Date of Patent: April 23, 2024Assignee: International Business Machines CorporationInventors: Hiroki Kawasaki, Shingo Nagai
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Publication number: 20240093474Abstract: A toilet management system includes a toilet bowl device installed in a toilet room, a management device configured to manage a use situation of the toilet bowl device, and a communication device configured to transmit use situation information related to the use situation of the toilet bowl device to the management device. The management device includes an acquirer configured to acquire the use situation information from the communication device, and an abnormality detector configured to detect an abnormality of the toilet bowl device or a facility or equipment installed inside or around the toilet room when the use situation information acquired by the acquirer matches a predetermined condition.Type: ApplicationFiled: November 28, 2023Publication date: March 21, 2024Applicant: LIXIL CorporationInventors: Makoto SARUTA, Shoji Ogawa, Hiroki Shigetomo, Hideyuki Ida, Rina Nagai, Keita Matsudate, Misaki Nagata, Sadaaki Shichino, Toshiki Hashida
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Patent number: 11916563Abstract: Provided are an analog-to-digital (AD) converter, a sensor processing circuit, and a sensor system capable of improving responsiveness of feedback control. AD converter includes input part, AD conversion part, first output part, and second output part. The analog signal output from sensor is input to input part. AD conversion part digitally converts an analog signal to generate first digital data and second digital data. First output part outputs the first digital data to control circuit. Second output part outputs the second digital data to sensor before first output part outputs the first digital data.Type: GrantFiled: March 9, 2020Date of Patent: February 27, 2024Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Jun'Ichi Naka, Koji Obata, Junji Nakatsuka, Hiroki Yoshino, Masaaki Nagai
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Patent number: 11913367Abstract: There is provided an exhaust gas purifying catalyst including a substrate and catalyst portions. The substrate includes an inflow-side cells, outflow-side cells, and porous partition walls, each partition wall separating the inflow-side cell from the outflow-side cell. The catalyst portion includes: (group A) first catalyst portions, each first catalyst portion being provided on a surface of the partition wall that faces the inflow-side cell on an upstream side in an exhaust gas flow direction; and (group B) second catalyst portions being provided on a surface of the partition wall that faces the outflow-side cell on a downstream side in the exhaust gas flow direction. Each catalyst portion of one of group A and group B includes at least one oxidizing catalyst layer and at least one reducing catalyst layer, and each catalyst portion of the other of group A and group B includes at least one oxidizing catalyst layer and/or at least one reducing catalyst layer.Type: GrantFiled: April 17, 2019Date of Patent: February 27, 2024Assignees: Mitsui Mining & Smelting Co., Ltd., HONDA MOTOR CO., LTD.Inventors: Hiroki Kurihara, Yusuke Nagai, Shingo Akita, Yoshinori Endo, Takeshi Mori, Takayuki Watanabe, Tomoko Tsuyama
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Publication number: 20240055830Abstract: A semiconductor laser element that includes a semiconductor layer including a waveguide formed in an intra-layer direction of the semiconductor layer and a window region formed in a front-side end face of the waveguide, has a current-laser optical output characteristic in which, at an operating temperature of 25° C.±3° C., a laser optical output has a maximum value at a first driving current value and the laser optical output is at most 20% of the maximum value at a second driving current value greater than the first driving current value, and is not damaged at the second driving current value.Type: ApplicationFiled: October 13, 2023Publication date: February 15, 2024Inventors: Kazumasa NAGANO, Hiroki NAGAI
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Publication number: 20240046299Abstract: When electrified vehicle is a vehicle capable of externally charging electric power, the point granting device imparts a point in accordance with a ratio of the amount of electric power obtained from renewable energy to the amount of electric power charged. In addition, when electrified vehicle is a vehicle traveling using electric power, the point granting device imparts a point in response to the actual electric power cost achieved by the traveling being equal to or higher than the modeled electric power cost.Type: ApplicationFiled: June 13, 2023Publication date: February 8, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisuke OKANISHI, Hiroki NAGAI, Takaaki MATSUI, Koichiro ISOBE, Kentaro SUZUKI
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Publication number: 20230395891Abstract: A power supply device includes a secondary cell, a detection device, a storage device, and a control device. The secondary cell includes an electrolyte solution. The detection device detects the voltage and temperature of the secondary cell. The storage device stores first information and second information. The first information indicates the relationship among the voltage, the temperature, and the amount of decrease in the electrolyte solution during energization of the secondary cell. The second information indicates the relationship among the voltage, the temperature, and the amount of decrease in the electrolyte solution during storage of the secondary cell. The control device calculates a first index indicating the amount of decrease in the electrolyte solution.Type: ApplicationFiled: May 5, 2023Publication date: December 7, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takaaki MATSUI, Hiroki NAGAI, Hiroki IGUCHI, Koichiro ISOBE, Daisuke OKANISHI
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Publication number: 20230387662Abstract: A semiconductor laser element includes a substrate and a semiconductor stack. The semiconductor stack includes an N-side semiconductor layer, an active layer, a P-side semiconductor layer, and a P-type contact layer. The semiconductor stack includes two end faces. Laser light resonates between the two end faces. The semiconductor stack includes: a ridge portion; and a bottom portion surrounding the ridge portion in a top view of the semiconductor stack. The ridge portion protrudes upward from the bottom portion, is spaced apart from the two end faces, and includes at least a portion of the P-type contact layer. A current injection window is provided only on the ridge portion out of a top face of the semiconductor stack, the current injection window being a region into which a current is injected. A distance from a top face of the active layer to the bottom portion is constant.Type: ApplicationFiled: July 25, 2023Publication date: November 30, 2023Inventors: Yasumitsu KUNOH, Atsushi YAMADA, Hiroki NAGAI, Togo NAKATANI, Naoto YANAGITA, Masayuki HATA
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Patent number: 11824326Abstract: A semiconductor laser element that includes a semiconductor layer including a waveguide formed in an intra-layer direction of the semiconductor layer and a window region formed in a front-side end face of the waveguide, has a current-laser optical output characteristic in which, at an operating temperature of 25° C.±3° C., a laser optical output has a maximum value at a first driving current value and the laser optical output is at most 20% of the maximum value at a second driving current value greater than the first driving current value, and is not damaged at the second driving current value.Type: GrantFiled: January 26, 2021Date of Patent: November 21, 2023Assignee: NUVOTON TECHNOLOGY CORPORATION JAPANInventors: Kazumasa Nagano, Hiroki Nagai
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Publication number: 20230291274Abstract: A power tool includes a resin member in a rotor that is less susceptible to breaking. A power tool includes a stator, a rotor rotatable relative to the stator at a speed of 30000 rpm or greater, and an output unit drivable by the rotor. The stator includes a stator core, an insulator fixed to the stator core, and a coil held on the insulator. The rotor includes a rotor core having a slot, a permanent magnet received in the slot in the rotor core, and a resin member fixing the rotor core and the permanent magnet. The resin member includes an annular portion protruding from an end face of the rotor core. The annular portion includes a cut portion.Type: ApplicationFiled: January 18, 2023Publication date: September 14, 2023Applicant: MAKITA CORPORATIONInventors: Hiroki NAGAI, Takaya YAMADA, Yuya SANO
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Publication number: 20230251322Abstract: ECU evaluates high-rate degradation of a lithium-ion battery, using a score and an in-plane score. The score is an index for evaluating unevenness in salt concentration of an electrode body in a lamination direction of the electrode body. The in-plane score is an index for evaluating unevenness in salt concentration of the electrode body in an in-plane direction of the electrode body. For each computing cycle, ECU calculates a current score, and calculates a current in-plane score based on an SOC (State Of Charge) of the lithium-ion battery. When the absolute value of an in-plane integrated score is beyond a reference value, ECU evaluates the high-rate degradation based on the current score, the current in-plane score, and a degradation score which is obtained by integrating previous scores beyond a deadband. When the absolute value is below the reference value, ECU evaluates the high-rate degradation, based on the degradation score.Type: ApplicationFiled: April 10, 2023Publication date: August 10, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki Nagai, Hiroki Tashiro, Yoshihiro Uchida, Mitsuhiro Kuzuba, Yuki Sugo
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Publication number: 20230194619Abstract: The battery system includes a secondary battery, a voltage sensor, a current sensor, a temperature sensor, and a processor. The processor is configured to calculate a polarization overvoltage by subtracting a voltage drop amount caused by a DC resistance and a reactive resistance of the secondary battery determined in accordance with a temperature and an SOC of the secondary battery from a voltage difference between OCV and CCV of the secondary battery.Type: ApplicationFiled: November 16, 2022Publication date: June 22, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kentaro SUZUKI, Daisuke Okanishi, Hiroki Nagai, Yoshiki Sugino, Nobuyuki Tanaka, Yuki Sugo, Shunya Kobayashi, Ryo Inoue, Takahiro Noguchi, Ryota Takizawa
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Patent number: 11656290Abstract: ECU evaluates high-rate degradation of a lithium-ion battery, using a score and an in-plane score. The score is an index for evaluating unevenness in salt concentration of an electrode body in a lamination direction of the electrode body. The in-plane score is an index for evaluating unevenness in salt concentration of the electrode body in an in-plane direction of the electrode body. For each computing cycle, ECU calculates a current score, and calculates a current in-plane score based on an SOC (State Of Charge) of the lithium-ion battery. When the absolute value of an in-plane integrated score is beyond a reference value, ECU evaluates the high-rate degradation based on the current score, the current in-plane score, and a degradation score which is obtained by integrating previous scores beyond a deadband. When the absolute value is below the reference value, ECU evaluates the high-rate degradation, based on the degradation score.Type: GrantFiled: January 26, 2021Date of Patent: May 23, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki Nagai, Hiroki Tashiro, Yoshihiro Uchida, Mitsuhiro Kuzuba, Yuki Sugo
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Patent number: 11635470Abstract: An ECU is configured to execute SOC estimation control for estimating an SOC of a battery. The ECU obtains “first voltage” indicating an OCV of the battery in the SOC estimation control. The ECU controls an engine and a PCU such that the battery is charged with an amount of electric power equal to or larger than a prescribed amount, when the first voltage is within a voltage range where hysteresis occurs. The ECU obtains “second voltage” indicating an OCV of the charged battery, and estimates the SOC of the battery from the second voltage.Type: GrantFiled: September 4, 2019Date of Patent: April 25, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, PANASONIC HOLDINGS CORPORATIONInventors: Tatsuya Koga, Hiroki Nagai, Mina Nishigaki, Daisuke Nishide, Ryushiro Tokunaga
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Patent number: 11608776Abstract: In a tractor, a radiator is arranged on one front-rear side relative to an engine. A cooling fan is provided between the radiator and an engine. A fan drive belt is wound around a fan support shaft and around an output shaft of the engine extending below the fan support shaft. A compressor is located above the output shaft and is supported to the engine at a position offset to one lateral side of the engine relative to the fan support shaft. A compressor drive belt is wound around the output shaft and a compressor drive shaft. The compressor drive belt is located on a side where the compressor is located relative to the fan support shaft, when viewed in a front-rear direction.Type: GrantFiled: October 14, 2020Date of Patent: March 21, 2023Assignee: Kubota CorporationInventors: Hiroki Nagai, Sachiko Tsujimori, Tomohisa Yamamoto, Taisuke Hashimoto, Kunihiro Yoneguchi
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Publication number: 20230021325Abstract: A semiconductor laser device includes an N-type cladding layer, an active layer, and a P-type cladding layer. The active layer includes a well layer, a P-side first barrier layer above the well layer, and a P-side second barrier layer above the P-side first barrier layer. The P-side second barrier layer has an AI composition ratio higher than an AI composition ratio of the P-side first barrier layer. The P-side second barrier layer has band gap energy greater than band gap energy of the P-side first barrier layer. The semiconductor laser device has an end face window structure in which band gap energy of a portion of the well layer in a vicinity of an end face that emits the laser light is greater than band gap energy of a central portion of the well layer in a resonator length direction.Type: ApplicationFiled: September 28, 2022Publication date: January 26, 2023Inventors: Toru TAKAYAMA, Togo NAKATANI, Hiroki NAGAI, Takashi YUMOTO, Takeshi YOKOYAMA, Shoichi TAKASUKA
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Publication number: 20230018565Abstract: A battery module includes: a plurality of battery cells each of which has a flat shape; a plurality of elastic spacers laminated and disposed alternately with the battery cells; and a restraining member configured to restrain the battery cells and the elastic spacers in a laminating direction of the battery cells. Each of the elastic spacers has a sheet portion that extends between two adjacent battery cells and a plurality of protrusions that protrudes from one surface of the sheet portion. The protrusions are disposed at an equal interval along at least a first direction. When an interval between the protrusions in the first direction is x and a dimension of each protrusion in the first direction is y, relationships of 4 mm?y?18 mm, y?4/9x?10/3, and y?x?2 are satisfied.Type: ApplicationFiled: May 24, 2022Publication date: January 19, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki NAGAI, Takaaki MATSUI, Takafumi NOSE, Koichiro ISOBE, Ryo NOGIMURA, Kazuyuki KANAI
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Publication number: 20230006321Abstract: A power storage module includes: a first power storage cell and a second power storage cell placed to be adjacent to each other, the first power storage cell and the second power storage cell each including a housing having a top face and external terminals provided on the top face; and a spacer having an insulating property and placed between the housings adjacent to each other. The spacer includes a discharge portion via which liquid reaching the spacer from above is discharged to outside the spacer.Type: ApplicationFiled: May 18, 2022Publication date: January 5, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki NAGAI, Takaaki MATSUI, Takafumi NOSE, Koichiro ISOBE
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Patent number: 11515592Abstract: A battery module includes a secondary battery, a cooler, and a heat conducting member disposed between the secondary battery and the cooler. The secondary battery has at least one electrode body and a case. The case has an opposite wall facing the cooler. The opposite wall has a recessed groove shaped so as to be depressed toward the inside of the case. The heat conducting member fills a space between the opposite wall and the cooler including the inside of the recessed groove.Type: GrantFiled: September 2, 2020Date of Patent: November 29, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki Nagai, Keiji Kaita
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Patent number: 11512766Abstract: A vibration damping apparatus including a support member rotatable together with a rotational element, a restoration force generating member coupled to the support member to transmit and receive a torque with the support member, an inertial mass coupled to the support member via the restoration force generating member, a first guide surface on the restoration force generating member, a second guide surface on the inertial mass, and a coupling member having first and second rolling portions. The first and second guide surfaces are formed so that the first rolling portion rolls along the first guide surface and the second rolling portion rolls along the second guide surface along with rotation of the support member causing the restoration force generating member to swing about a rotation center of the rotational element along a radial direction of the support member and causing the inertial mass to swing about the rotation center.Type: GrantFiled: September 28, 2018Date of Patent: November 29, 2022Assignee: AISIN CORPORATIONInventors: Kazuyoshi Ito, Yoichi Oi, Takao Sakamoto, Hiroki Nagai, Kazuhiro Itou