Patents by Inventor Masayuki Tamura

Masayuki Tamura 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: 11190541
    Abstract: An object is to provide a monitor device capable of reducing threat of DoS attacks on a mobile network. A monitor device (10) according to the present invention includes a signal monitor unit (11) for estimating a specific base station communicating with a communication terminal (30) attacking a mobile network according to the number of times an ATTACH procedure is rejected, in which the ATTACH procedure is for registering information about a communication terminal (30) communicating with a base station (20) in a communication device (40) located in the mobile network, and a base station control unit (12) for causing the specific base station to determine whether to execute the ATTACH procedure related to a communication terminal served by the specific base station according to communication terminal identification information set in a signal transmitted from the communication terminal served by the specific base station.
    Type: Grant
    Filed: July 4, 2016
    Date of Patent: November 30, 2021
    Assignee: NEC CORPORATION
    Inventors: Kazuaki Nakajima, Shinji Masuda, Toshiyuki Tamura, Hidemi Ishikawa, Masayuki Shinsho
  • Patent number: 11129113
    Abstract: A system includes a terminal apparatus and a base station. The base station includes a transmitter which transmits an offset value for controlling a transmission power of a sounding reference signal (SRS) to the terminal apparatus, and a receiver which receives the SRS from the terminal apparatus. The terminal apparatus includes a transmission controller which controls the transmission power of the SRS using the offset value, and a transmitter which transmits the SRS. The offset value is set within one of a first offset setting range having a first lower limit value and a first upper limit value and a second offset setting range having a second lower limit value and a second upper limit value, wherein a difference between the first lower limit value and the second lower limit value is equal to a difference between the first upper limit value and the second upper limit value.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: September 21, 2021
    Assignee: Sun Patent Trust
    Inventors: Takashi Iwai, Daichi Imamura, Masayuki Hoshino, Akihiko Nishio, Takashi Tamura, Kazuki Takeda
  • Publication number: 20210262572
    Abstract: A seal structure includes a mounting groove disposed in a first member and a packing unit housed in the mounting groove. The packing unit includes an inner circumferential mounting section and an outer circumferential sliding section. Both side surfaces of the packing unit are conical surfaces which are inclined such that their diameters gradually increase in a direction from the mounting section toward the sliding section and which are inclined in mutually opposite directions. The thickness of the packing unit increases in a gradual manner in the direction from the mounting section toward the sliding section, the thickness in the mounting section is the smallest, and the thickness in the sliding section is the largest.
    Type: Application
    Filed: June 6, 2019
    Publication date: August 26, 2021
    Applicant: SMC CORPORATION
    Inventors: Masayuki KUDO, Kenichi TAKEDA, Masahiko KAWAKAMI, Ken TAMURA, Tsukasa ODAKA
  • Patent number: 10871117
    Abstract: After an engine is started, an ECU performs first regeneration processing of a PM sensor through heating by a heater and, after the first regeneration processing, applies a voltage continuously to detection electrodes for a predetermined voltage application period. The ECU causes PM to adhere to an insulating substrate due to the voltage application and, at a time point after the predetermined time period has elapsed, determines the amount of PM that is adhering to the insulating substrate. When a predetermined condition is satisfied outside the voltage application period, the ECU determines whether the amount of adhering PM on the insulating substrate is equal to or greater than an excess determination threshold value. If the amount of adhering PM is determined to be equal to or greater than the excess determination threshold value, the ECU performs second regeneration processing of the PM sensor, through heating by the heater.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: December 22, 2020
    Assignee: DENSO CORPORATION
    Inventors: Masahiro Yamamoto, Masayuki Tamura, Takashi Araki, Go Miyagawa, Manabu Yoshidome, Masato Katsuno, Toshihiro Sakawa
  • Patent number: 10837878
    Abstract: A particulate matter detection sensor includes a particulate matter detection unit for changing the output of an electrical signal in accordance with change in the electrical characteristics due to the deposition of particulate matter contained in an exhaust gas G discharged from an internal combustion engine, and a cover member having a cylindrical cover wall and disposed to surround the particulate matter detection unit. The particulate matter detection unit includes a deposition portion on which a part of the particulate matter is deposited, and a plurality of detection electrodes disposed being spaced apart from each other on the deposition portion. The deposition portion of the particulate matter detection unit is arranged so as to be oriented towards the tip side of the cover member. The cover wall of the cover member includes a plurality of exhaust gas introduction holes formed at positions closer to the tip side than is the deposition portion.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: November 17, 2020
    Assignee: DENSO CORPORATION
    Inventors: Kazuhiko Koike, Masayuki Tamura, Hirokatsu Imagawa
  • Patent number: 10794811
    Abstract: An apparatus which detects particulate matter is provided. This apparatus estimates a volume of water inside an exhaust passage using estimation sections. When an estimated volume of water is larger than a water drainage threshold, an element portion is heated using a heater by the first temperature range controller, in a temperature range which resists water-induced cracking independent of a volume of water droplets. If the estimated volume of water is less than a water drainage threshold, the water drainage determination section determines that the water drainage of the exhaust passage is completed. Additionally, if it is estimated that the water drainage is completed, the element portion is heated by a second temperature controller at temperature lower than a starting temperature of combustion of particulate matter and in order to repel water adhered onto the element portion in a water-repellent temperature range for a predetermined period.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: October 6, 2020
    Assignee: DENSO CORPORATION
    Inventors: Go Miyagawa, Masayuki Tamura, Masahiro Yamamoto, Takashi Araki, Toshihiro Sakawa, Masato Katsuno, Manabu Yoshidome
  • Patent number: 10648381
    Abstract: A particulate matter detecting device includes: an element unit on which particulate matter contained in exhaust gas from an internal combustion engine is deposited; a heater that heats the element unit; a detecting unit that detects the amount of particulate matter on the basis of electrical characteristics of the element unit; and a control unit that controls the operation of the heater. For a predetermined period that does not include a period in which the particulate matter is deposited on the element unit, the control unit operates the heater using a predetermined amount of control set in advance such that the temperature of the element unit is higher than the temperature of the exhaust gas and lower than a predetermined temperature at which the element unit is thermally degraded.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: May 12, 2020
    Assignee: DENSO CORPORATION
    Inventors: Masayuki Tamura, Takashi Araki, Masahiro Yamamoto, Go Miyagawa, Manabu Yoshidome, Masato Katsuno, Toshihiro Sakawa
  • Patent number: 10627312
    Abstract: A particulate matter sensor and a particulate matter sensing system using such a sensor are provided which are capable of being produced at decreased cost and accurately measuring the temperature of a heater. The particulate matter sensor includes a deposition portion on which particulate matter contained in exhaust gas is accumulated, a pair of electrodes which are disposed on the deposition portion and separate from each other, a heater which heats the deposition portion, and a pair of heater leads which form a path through which electrical current is delivered to the heater. A sensing line is connected to at least one of the heater leads to measure a resistance of the heater lead.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: April 21, 2020
    Assignee: DENSO CORPORATION
    Inventors: Go Miyagawa, Kouji Andoh, Masayuki Tamura, Hirokatsu Imagawa, Takao Mishima, Hideki Yamada, Masahiro Yamamoto
  • Patent number: 10578518
    Abstract: A control unit (6) estimates an output value of a PM sensor (S2) located at a downstream side of a DPF used as a reference filter, and detects whether the estimated output value exceeds a predetermined value (S3). When the estimated output value exceeds the predetermined value (YES in S3), the control unit detects an output value of the PM sensor (S4), and a heater heats the PM sensor (S5). The control unit detects an output value of the PM sensor (S6) after the PM sensor is heated, and calculates a change ratio of the output values of the PM sensor before and after heating (S7). The control unit estimates an average particle size of PM based on the calculated change ratio (S8), and detects whether the DPF has failed based on a comparison result of a corrected output value of the PM sensor with a threshold value.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: March 3, 2020
    Assignee: DENSO CORPORATION
    Inventors: Hironobu Shimokawa, Kazuhiko Koike, Kensuke Takizawa, Manabu Yoshidome, Masayuki Tamura
  • Patent number: 10557815
    Abstract: A sensor element which has a pair of positive and negative detection electrodes disposed on a surface of an insulation body as a detecting portion and a cover body configured to cover an opening of a cylindrical housing. The cover body is provided with gas inlet and outlet holes via which the measuring gas is introduced and discharged. The pair of detection electrodes have a plurality of wire electrodes. The wire electrodes electrically connected to the positive electrode and the wire electrodes electrically connected to the negative electrode are alternately arranged in parallel. Any one of a first insulation layer which is a narrow electrode interval Dn and a second insulation layer which is a wide electrode interval Dw, arranged between adjacent wire electrodes, and the first insulation layer arranged in a center part of the detecting portion.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: February 11, 2020
    Assignee: DENSO CORPORATION
    Inventors: Masahiro Yamamoto, Masayuki Tamura, Go Miyagawa, Toru Katafuchi, Takehito Kimata, Yuto Tamei
  • Patent number: 10487716
    Abstract: A particulate matter detection apparatus is provided with an element portion onto which PM contained in exhaust gas of an engine adheres thereto. A heater which heats the element portion, a quantity detecting portion which detects a quantity of the PM based on electrical properties of the element portion and a temperature detecting portion which detects a temperature of the element portion. The apparatus is further provided with a first and second temperature controller. The first temperature controller heats the element portion using a heater in a first period, which excludes a period in which PM adheres to the element portion based on a detected temperature of the element portion. The element portion is heated in a first temperature range to combust soluble organic fractions contained in the PM and resist melting of ash components contained in the PM. The first period excludes a period in which PM adheres to the element portion.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: November 26, 2019
    Assignee: DENSO CORPORATION
    Inventors: Takashi Araki, Masayuki Tamura, Masahiro Yamamoto, Go Miyagawa, Toshihiro Sakawa, Masato Katsuno, Manabu Yoshidome
  • Patent number: 10439367
    Abstract: An ignition plug for an internal combustion engine includes an electrode protrusion that protrudes from an electrode base material of a ground electrode toward a discharge gap. The electrode protrusion has a base part that is integrated with the electrode base material and a cover part that is joined to the base part and faces the discharge gap. The base part has an end surface facing a protrusion direction of the base part and a side peripheral surface. An outer edge of the end surface has a curved surface. The cover part is formed from a precious metal or a precious metal alloy having a lower linear expansion coefficient than that of a material for forming the base part and covers at least a part of the side peripheral surface and the end surface of the base part. While the ignition plug is attached to an internal combustion engine and the electrode protrusion is heated and then cooled, a projection is formed on an outer surface of a portion covering the side peripheral surface of the base part.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 8, 2019
    Assignee: DENSO CORPORATION
    Inventors: Masayuki Tamura, Nobuo Abe, Masamichi Shibata
  • Patent number: 10422295
    Abstract: A filter malfunction determination apparatus includes a calculator that calculates, upon determination that a rapid output increase has occurred, an amount of change of a parameter value output from a sensor before and after the rapid output increase. The calculator calculates, based on the calculated amount of change, a correction value for correcting at least one of the parameter value output from the sensor and a malfunction determination threshold. The filter malfunction determination apparatus includes an offset corrector configured to perform, based on the correction value, offset correction of at least one of the parameter value output from the sensor and the malfunction determination threshold after determination that the rapid output increase has occurred.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: September 24, 2019
    Assignee: DENSO CORPORATION
    Inventors: Masahiro Yamamoto, Manabu Yoshidome, Masayuki Tamura, Go Miyagawa
  • Publication number: 20190276187
    Abstract: Provided are: a package that is capable of transporting a composite material without generating fluff by suppressing shedding of carbon fibers from the composite material while holding the composite material at a fixed position during transportation; and a method for manufacturing the package. This package is prepared by stacking a composite material in the form of a plurality of plates on a mounting stand having a plurality of fitting holes, wherein: the composite material includes carbon fibers and a thermoplastic resin; the composite material is held by a plurality of holding members detachably attached to the fitting holes; of the contact surfaces of the composite material and the holding members, one of the contact surfaces of either the composite material or the holding members is curved, and the other contact surface is flat or curved.
    Type: Application
    Filed: August 24, 2017
    Publication date: September 12, 2019
    Applicant: Teijin Limited
    Inventors: Masayuki Tamura, Takuro Yoneda
  • Patent number: 10371615
    Abstract: A particulate matter detection sensor has an accumulation section for accumulating a part of particulate matter particles contained in exhaust gas emitted from an internal combustion engine, and a pair of a first detection electrode and a second detection electrode formed on the accumulation section. The second detection electrode is formed separated from the first detection electrode. The first detection electrode has projecting parts which project toward the second detection electrode. Because a separation between the first and second detection electrodes is locally reduced at the projecting parts, the projecting parts attract and accumulate more particulate matter, and this structure makes it possible to allow the particulate matter detection sensor to have improved detection sensitivity.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: August 6, 2019
    Assignee: DENSO CORPORATION
    Inventors: Go Miyagawa, Masayuki Tamura
  • Patent number: 10352226
    Abstract: A particulate matter sensor detecting particulate matter in exhaust emissions is provided, which is resistant to having sensor surfaces buried by particulate matter residue. Detection electrodes are provided, with alternating polarity, laminated in a laminating direction, separated by insulation. Of the detection electrodes, first detection electrodes of one polarity and second detection electrodes of the other polarity are exposed perpendicular to the laminating direction. In the direction perpendicular to the laminating direction, the particulate matter sensor has target accumulating parts on which the particulate matter is accumulated. In the target accumulating parts, the thickness W1 of the first detection electrodes in the laminating direction is greater than the thickness W2 of the second detection electrodes in the laminating direction.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: July 16, 2019
    Assignee: DENSO CORPORATION
    Inventors: Kazuhiko Koike, Hironobu Shimokawa, Masayuki Tamura
  • Patent number: 10352842
    Abstract: A particulate matter detection element 1 includes paired detection electrodes 12 for detecting particulate matter contained in exhaust gas discharged from an internal combustion engine, and insulating member 13 made of electrically insulating material. In the particulate matter detection element 1, at least part of the paired detection electrodes 12 is exposed from the insulating member 13 in the direction perpendicular to the lamination direction of the paired detection electrodes 1, to cause part of the particulate matter to deposit thereon. The surface roughness of at least the insulating member disposed between the paired detection electrodes is between 0.8 ?m and 8.0 ?m in 10-point average roughness.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: July 16, 2019
    Assignee: DENSO CORPORATION
    Inventors: Kazuhiko Koike, Hironobu Shimokawa, Masayuki Tamura, Go Miyagawa, Tomotaka Mouri
  • Publication number: 20190214795
    Abstract: An ignition plug for an internal combustion engine includes an electrode protrusion that protrudes from an electrode base material of a ground electrode toward a discharge gap. The electrode protrusion has a base part that is integrated with the electrode base material and a cover part that is joined to the base part and faces the discharge gap. The base part has an end surface facing a protrusion direction of the base part and a side peripheral surface. An outer edge of the end surface has a curved surface. The cover part is formed from a precious metal or a precious metal alloy having a lower linear expansion coefficient than that of a material for forming the base part and covers at least a part of the side peripheral surface and the end surface of the base part. While the ignition plug is attached to an internal combustion engine and the electrode protrusion is heated and then cooled, a projection is formed on an outer surface of a portion covering the side peripheral surface of the base part.
    Type: Application
    Filed: March 24, 2017
    Publication date: July 11, 2019
    Applicant: DENSO CORPORATION
    Inventors: Masayuki TAMURA, Nobuo ABE, Masamichi SHIBATA
  • Patent number: 10337974
    Abstract: A particulate matter detection sensor has an element part for detecting an amount of PM contained in exhaust gas emitted from an internal combustion engine. A deposition part and at least a pair of detection electrodes are formed on an end surface of the element part. Some of particles of PM is deposited on the deposition part. The pair of detection electrodes are arranged on the deposition part. The particulate matter detection sensor changes its output electrical signal according to variation of electrical properties between the pair of the detection electrodes due to deposition of PM on the deposition part. A concave collection part is formed on the deposition part. The concave collection part has a concaved shape when viewed from the edge surface of the element part.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: July 2, 2019
    Assignee: DENSO CORPORATION
    Inventors: Tomotaka Mouri, Masayuki Tamura, Masahiro Yamamoto, Go Miyagawa, Hironobu Shimokawa, Kazuhiko Koike
  • Patent number: 10208643
    Abstract: A particulate matter detection apparatus includes a particulate matter quantity detection means, a temperature detection means that detects the temperature of exhaust gas, a control unit and a heating means. The particulate matter quantity detection means includes a particulate matter deposition portion that deposits thereon part of particulate matter contained in the exhaust gas emitted from an internal combustion engine and a pair of opposite electrodes arranged apart from each other on the particulate matter deposition portion. The control unit determines a deposition quantity of the particulate matter on the particulate matter deposition portion based on an electrical signal outputted by the particulate matter quantity detection means and receives information on the temperature of the exhaust gas detected by the temperature detection means. The control unit controls the heating means to heat the particulate matter deposition portion to 300° C.-800° C. during a cold start of the internal combustion engine.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: February 19, 2019
    Assignee: DENSO CORPORATION
    Inventors: Go Miyagawa, Hirokatsu Imagawa, Masayuki Tamura