Patents by Inventor Shunsuke Akasaka
Shunsuke Akasaka 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: 20240102879Abstract: A liquid leakage detection system that detects a liquid includes: a liquid leakage sensor including a first detector that detects adhesion of the liquid based on a change in impedance between a first electrode and a second electrode; and a control device that acquires information including the impedance between the first electrode and the second electrode, wherein the liquid leakage sensor includes a heater that heats the first electrode and the second electrode, and wherein the control device determines whether or not liquid leakage or dew condensation has occurred based on the impedance between the first electrode and the second electrode that are in a state of being heated by the heater, and notifies the determination result.Type: ApplicationFiled: August 15, 2023Publication date: March 28, 2024Inventors: Shunsuke AKASAKA, Takashi NAIKI
-
Patent number: 11933813Abstract: Disclosed herein is a wind measuring system including a first flow sensor and plural second flow sensors. The first flow sensor and the plural second flow sensors each include a microheater including a board, an insulating film, and a heater. The board includes a first principal surface and a second principal surface. The board has defined therein an opening portion passing through the board along a direction from the first principal surface toward the second principal surface. The insulating film includes a peripheral portion disposed on the first principal surface, a central portion having the heater disposed thereon, and a connection portion extending from the central portion to be connected to the peripheral portion to support the central portion over the opening portion. The first flow sensor and the plural second flow sensors each output a signal that varies according to a change in electrical resistance value of the heater.Type: GrantFiled: September 13, 2021Date of Patent: March 19, 2024Assignee: ROHM Co., LTD.Inventor: Shunsuke Akasaka
-
Patent number: 11936044Abstract: A carbon material for a non-aqueous secondary battery containing a graphite capable of occluding and releasing lithium ions, and having a cumulative pore volume at pore diameters in a range of 0.01 ?m to 1 ?m of 0.08 mL/g or more, a roundness, as determined by flow-type particle image analysis, of 0.88 or greater, and a pore diameter to particle diameter ratio (PD/d50 (%)) of 1.8 or less, the ratio being given by equation (1A): PD/d50 (%)=mode pore diameter (PD) in a pore diameter range of 0.01 ?m to 1 ?m in a pore distribution determined by mercury intrusion/volume-based average particle diameter (d50)×100 is provided.Type: GrantFiled: January 5, 2017Date of Patent: March 19, 2024Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Shunsuke Yamada, Nobuyuki Ishiwatari, Satoshi Akasaka, Daigo Nagayama, Shingo Morokuma, Koichi Nishio, Iwao Soga, Hideaki Tanaka, Takashi Kameda, Tooru Fuse, Hiromitsu Ikeda
-
Patent number: 11885763Abstract: A gas concentration measurement system includes a limiting current-type gas sensor, a voltage source connected to the limiting current-type gas sensor, a current detector connected to the limiting current-type gas sensor, and a gas concentration arithmetic unit connected to the current detector. The voltage source supplies first and second voltages to the limiting current-type gas sensor. The first and second voltages generate first and second limiting currents corresponding to first and second gases, respectively, in the limiting current-type gas sensor. The current detector acquires first and second limiting current values of the limiting current-type gas sensor when the first and second voltages are applied to the limiting current-type gas sensor, respectively.Type: GrantFiled: February 3, 2021Date of Patent: January 30, 2024Assignee: ROHM Co., LTD.Inventors: Shunsuke Akasaka, Yurina Amamoto, Ken Nakahara
-
Patent number: 11867656Abstract: Disclosed herein is a limiting-current type gas sensor including a solid electrolyte, a first electrode disposed on the solid electrolyte, a second electrode disposed on the solid electrolyte, and a gas feed passage extending between a gas inlet and a first portion of the first electrode, the first portion facing the solid electrolyte. The first electrode is a first porous metal electrode. The gas feed passage is formed of a first porous transition metal oxide having a second melting point higher than a first melting point of the first electrode. The first porous transition metal oxide is Ta2O5, TiO2, or Cr2O3.Type: GrantFiled: February 3, 2021Date of Patent: January 9, 2024Assignee: ROHM Co., LTD.Inventors: Shunsuke Akasaka, Yurina Amamoto, Hiroyuki Yuji
-
Publication number: 20240003859Abstract: A gas sensor includes: a gas detector; and a lid configured to cover the gas detector, wherein the lid is made of a semiconductor material, wherein the lid includes a first main surface facing the gas detector and a second main surface opposite the first main surface, wherein the lid is provided with a plurality of through-holes, each of the plurality of through-holes extending from the first main surface to the second main surface, and wherein each of the plurality of through-holes has a diameter of 50 ?m or less.Type: ApplicationFiled: June 30, 2023Publication date: January 4, 2024Inventor: Shunsuke AKASAKA
-
Patent number: 11753354Abstract: Disclosed is a production system for methane, including a reaction vessel having a solid electrolyte membrane and an electrode group including at least a pair of electrodes arranged on the solid electrolyte membrane, in which one of the electrodes functions as a cathode side electrode, and the other electrode functions as an anode side electrode, and the one electrode that functions as the cathode side electrode includes a hydrogenation catalyst.Type: GrantFiled: October 12, 2021Date of Patent: September 12, 2023Assignee: ROHM CO., LTD.Inventors: Shunsuke Akasaka, Yoshiaki Oku
-
Patent number: 11692860Abstract: Disclosed is a thermal flow sensor including a base member and a cover. The base member includes a heater. The cover is formed by an SOI substrate including a silicon substrate, a silicon dioxide film, and a silicon film. The silicon film has a recessed portion defined therein. A main flow passage portion is defined by an exposed surface of the silicon dioxide film which is exposed from the silicon film and which defines a bottom surface of the recessed portion, the silicon film defining a side surface of the recessed portion, and a first principal surface of the cover.Type: GrantFiled: March 15, 2021Date of Patent: July 4, 2023Assignee: ROHM Co., LTD.Inventors: Shunsuke Akasaka, Yurina Amamoto, Keisuke Wakamoto, Ken Nakahara
-
Publication number: 20220381725Abstract: There is provided a carbon dioxide gas sensor that includes a flow path including an inlet into which a detected target gas is introduced; and a first element and at least one second element arranged in the flow path. The first element includes a first solid electrolyte layer, a first cathode, and a first anode, the first solid electrolyte layer being interposed between the first cathode and the first anode. The at least one second element includes a second solid electrolyte layer, a second cathode, and a second anode, the second solid electrolyte layer being interposed between the second cathode and the second anode. The first solid electrolyte layer and the second solid electrolyte layer are formed of an oxygen ion conductor. The first cathode is inside the flow path. The second cathode and the second anode are inside the flow path and outside the flow path, respectively.Type: ApplicationFiled: May 23, 2022Publication date: December 1, 2022Inventors: Shunsuke AKASAKA, Ken NAKAHARA
-
Publication number: 20220381724Abstract: A gas sensor includes: a substrate; an insulating layer arranged over the substrate; and a solid electrolyte layer, wherein the substrate is formed with a cavity that penetrates the substrate in a thickness direction of the substrate, wherein the insulating layer has a peripheral portion arranged over the substrate around the cavity, and a membrane portion which is located over the cavity and is connected to the peripheral portion, wherein the membrane portion includes a movable portion, wherein a through-hole, which penetrates the membrane portion around the movable portion in the thickness direction, is formed such that the movable portion is capable of being displaced along the thickness direction, and wherein the solid electrolyte layer is arranged over the movable portion.Type: ApplicationFiled: May 19, 2022Publication date: December 1, 2022Inventor: Shunsuke AKASAKA
-
Publication number: 20220373505Abstract: There is provided a method of manufacturing a gas sensor that includes: forming an insulating layer on a main surface of a substrate; forming a porous oxide layer on the insulating layer; and forming a porous metal layer on the porous oxide layer, wherein the forming the porous metal layer is performed by depositing a constituent material of the porous metal layer in an inclined direction with respect to a normal line of a main surface.Type: ApplicationFiled: May 12, 2022Publication date: November 24, 2022Inventor: Shunsuke AKASAKA
-
Publication number: 20220120708Abstract: Provided is a sensor including a substrate that includes a major surface, a sensor part that includes a gas flow path formed of a porous material, and at least one of a heater or a temperature sensor. The heater is capable of heating the sensor part, the temperature sensor is capable of measuring temperature of the sensor part, the sensor part and the at least one of the heater or the temperature sensor are stacked over the major surface, the at least one of the heater or the temperature sensor is an interconnect having forward tapered side surfaces, and the at least one of the heater or the temperature sensor includes a metal interconnect layer, and the forward tapered side surfaces of the interconnect overlap with the gas flow path in plan view of the major surface.Type: ApplicationFiled: October 13, 2021Publication date: April 21, 2022Inventors: Yurina Amamoto, Shunsuke Akasaka
-
Publication number: 20220112139Abstract: Disclosed is a production system for methane, including a reaction vessel having a solid electrolyte membrane and an electrode group including at least a pair of electrodes arranged on the solid electrolyte membrane, in which one of the electrodes functions as a cathode side electrode, and the other electrode functions as an anode side electrode, and the one electrode that functions as the cathode side electrode includes a hydrogenation catalyst.Type: ApplicationFiled: October 12, 2021Publication date: April 14, 2022Inventors: Shunsuke Akasaka, Yoshiaki Oku
-
Publication number: 20220117044Abstract: A microheater includes a first insulating layer, a first adhesion layer on the first insulating layer, a wiring layer on the first adhesion layer, a second adhesion layer that covers the wiring layer, and a second insulating layer above the first insulating layer and on the second adhesion layer. In the microheater, the wiring layer contains platinum, the first adhesion layer and the second adhesion layer each contain a metal oxide, and the metal oxide has an oxygen-deficient region in which the oxygen is deficient in the stoichiometric ratio of metal to oxygen.Type: ApplicationFiled: December 24, 2021Publication date: April 14, 2022Applicant: ROHM CO., LTD.Inventors: Shunsuke AKASAKA, Encho BOKU, Hiroyuki YUJI
-
Publication number: 20220091149Abstract: Disclosed herein is a wind measuring system including a first flow sensor and plural second flow sensors. The first flow sensor and the plural second flow sensors each include a microheater including a board, an insulating film, and a heater. The board includes a first principal surface and a second principal surface. The board has defined therein an opening portion passing through the board along a direction from the first principal surface toward the second principal surface. The insulating film includes a peripheral portion disposed on the first principal surface, a central portion having the heater disposed thereon, and a connection portion extending from the central portion to be connected to the peripheral portion to support the central portion over the opening portion. The first flow sensor and the plural second flow sensors each output a signal that varies according to a change in electrical resistance value of the heater.Type: ApplicationFiled: September 13, 2021Publication date: March 24, 2022Inventor: Shunsuke Akasaka
-
Publication number: 20220077524Abstract: Provided are a heating device and a storage device. The heating device includes a board, and a plurality of microheaters arranged on the board and electrically connected to the board. The plurality of microheaters are arranged in a form of an array. Each of the plurality of microheaters includes a first silicon substrate, an insulating film, and a heater. A first opening portion that penetrates the first silicon substrate along a thickness direction is formed in the first silicon substrate. The insulating film includes a central portion on which the heater is disposed, a peripheral portion disposed on the first silicon substrate, and a connecting portion that connects the central portion and the peripheral portion to each other, and supports the central portion on the first opening portion. The storage device includes a battery pack and the above-described heating device. The board is disposed on the battery pack.Type: ApplicationFiled: September 1, 2021Publication date: March 10, 2022Inventors: Shunsuke Akasaka, Yurina Amamoto, Ken Nakahara
-
Publication number: 20220074886Abstract: Provided is a limiting current gas sensor including a first porous electrode including a main surface; a plurality of solid electrolyte islands provided on the main surface of the first porous electrode and separated from each other; and a second porous electrode provided on the plurality of solid electrolyte islands, in which the first porous electrode is provided across the plurality of solid electrolyte islands, the second porous electrode is provided across the plurality of solid electrolyte islands, and a maximum size of each of the plurality of solid electrolyte islands in plan view of the main surface is equal to or smaller than 50?2 ?m.Type: ApplicationFiled: September 3, 2021Publication date: March 10, 2022Inventor: Shunsuke Akasaka
-
Publication number: 20210293594Abstract: Disclosed is a thermal flow sensor including a base member and a cover. The base member includes a heater. The cover is formed by an SOI substrate including a silicon substrate, a silicon dioxide film, and a silicon film. The silicon film has a recessed portion defined therein. A main flow passage portion is defined by an exposed surface of the silicon dioxide film which is exposed from the silicon film and which defines a bottom surface of the recessed portion, the silicon film defining a side surface of the recessed portion, and a first principal surface of the cover.Type: ApplicationFiled: March 15, 2021Publication date: September 23, 2021Inventors: Shunsuke Akasaka, Yurina Amamoto, Keisuke Wakamoto, Ken Nakahara
-
Publication number: 20210247353Abstract: Disclosed herein is a limiting-current type gas sensor including a solid electrolyte, a first electrode disposed on the solid electrolyte, a second electrode disposed on the solid electrolyte, and a gas feed passage extending between a gas inlet and a first portion of the first electrode, the first portion facing the solid electrolyte. The first electrode is a first porous metal electrode. The gas feed passage is formed of a first porous transition metal oxide having a second melting point higher than a first melting point of the first electrode. The first porous transition metal oxide is Ta2O5, TiO2, or Cr2O3.Type: ApplicationFiled: February 3, 2021Publication date: August 12, 2021Inventors: Shunsuke Akasaka, Yurina Amamoto, Hiroyuki Yuji
-
Publication number: 20210247352Abstract: A gas concentration measurement system includes a limiting current-type gas sensor, a voltage source connected to the limiting current-type gas sensor, a current detector connected to the limiting current-type gas sensor, and a gas concentration arithmetic unit connected to the current detector. The voltage source supplies first and second voltages to the limiting current-type gas sensor. The first and second voltages generate first and second limiting currents corresponding to first and second gases, respectively, in the limiting current-type gas sensor. The current detector acquires first and second limiting current values of the limiting current-type gas sensor when the first and second voltages are applied to the limiting current-type gas sensor, respectively.Type: ApplicationFiled: February 3, 2021Publication date: August 12, 2021Inventors: Shunsuke Akasaka, Yurina Amamoto, Ken Nakahara