Patents by Inventor Yoshio Yamazaki

Yoshio Yamazaki 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: 10816376
    Abstract: A thermal flowmeter includes: a first thermal resistive element disposed on a pipe and sensing a first temperature of a fluid; a second thermal resistive element disposed on the pipe downstream relative to the first thermal resistive element and sensing a second temperature thereof; a control unit causing the second thermal resistive element to generate heat so that the second temperature is kept higher than the first temperature by a predetermined value; a power measurement unit measuring a power supplied to the second thermal resistive element; a temperature difference gradient calculation unit calculating a gradient of a difference between the second and first temperatures; a power compensation unit compensating the measured power based on the gradient of the difference and a value of the power when no fluid is in the pipe; and a flow rate calculation unit calculating a flow rate of the fluid based on the compensated power.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: October 27, 2020
    Assignee: AZBIL CORPORATION
    Inventors: Yuusei Yanagawa, Yoshio Yamazaki, Shinsuke Matsunaga, Wataru Hasebe
  • Patent number: 10788345
    Abstract: A thermal flowmeter includes a casing, a ferrule, a measuring tube penetrating through the ferrule, a sensor for flow rate detection, a joint shaft movably supported by end portions of the casing, one end portion of the joint shaft being connected to the measuring tube and the ferrule with a through hole of the joint shaft and a hollow portion of the measuring tube communicating with each other, the other end portion of the joint shaft sticking out of the casing, and a screw thread-fitted to each of the end portions of the casing, and including a pressing portion pressing the joint shaft into an inside of the casing. A seal structure includes a first tapered surface formed on the ferrule and a second tapered surface formed on the joint shaft and fitting the first tapered surface, and is provided between the ferrule and the joint shaft.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: September 29, 2020
    Assignee: AZBIL CORPORATION
    Inventors: Yoshio Yamazaki, Yasuhiko Oda
  • Patent number: 10788346
    Abstract: A thermal type flowmeter includes a sensor and a flow-rate calculating unit. The sensor includes a heater that heats a fluid to be measured. The sensor is configured to output a sensor value corresponding to a state of thermal diffusion in the fluid heated by the heater which is being driven in such a manner that a difference between a temperature of the heater and a temperature of the fluid at a location free from thermal influence of the heater is equal to a predetermined temperature difference. The flow-rate calculating unit is configured to calculate a flow rate of the fluid from the sensor value by using a flow-rate calculation equation, “sensor value=transformation coefficient A×log (flow rate)2+transformation coefficient B×log (flow rate)+transformation coefficient C”.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: September 29, 2020
    Assignee: AZBIL CORPORATION
    Inventors: Yoshio Yamazaki, Hidenori Hibi
  • Patent number: 10712191
    Abstract: A thermal flowmeter includes a tube, a temperature measuring device disposed on the tube and detecting a first temperature of a fluid, a heating and temperature measuring device disposed on the tube and detecting a second temperature of the fluid, a controller causing the heating and temperature measuring device to generate heat, a power determining unit determining a power consumption of the heating and temperature measuring device, a flow rate obtaining unit converting the power consumption into a flow rate, a flow rate correcting unit correcting the flow rate, a memory unit storing a first zero-point power consumption, a zero-point power ratio calculating unit calculating a zero-point power ratio based on the first zero-point power consumption and a second zero-point power consumption, and a setting unit calculating a correction factor based on the zero-point power ratio and setting the correction factor in the flow rate correcting unit.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: July 14, 2020
    Assignee: AZBIL CORPORATION
    Inventor: Yoshio Yamazaki
  • Patent number: 10551229
    Abstract: A preamplifier substrate on which a preamplifier is mounted, the preamplifier being configured to amplify electromotive forces detected by a pair of surface electrodes, is disposed outside a flux region where a magnetic flux is produced, and the preamplifier substrate extends in a direction intersecting a measuring tube.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: February 4, 2020
    Assignee: AZBIL CORPORATION
    Inventors: Osamu Momose, Hiroyuki Inagaki, Kouichi Mamada, Yoshio Yamazaki, Takumi Yamashita
  • Patent number: 10527471
    Abstract: A first connection line includes a first tube-side wiring pattern formed on an outer periphery of a measuring tube and connected at one end thereof to a first surface electrode, a first substrate-side wiring pattern formed on a preamplifier substrate and connected at one end thereof to a preamplifier, and a first jumper wire connecting the other end of the first tube-side wiring pattern to the other end of the first substrate-side wiring pattern; and a second connection line includes a second tube-side wiring pattern formed on the outer periphery of the measuring tube and connected at one end thereof to a second surface electrode, a second substrate-side wiring pattern formed on the preamplifier substrate and connected at one end thereof to the preamplifier, and a second jumper wire connecting the other end of the second tube-side wiring pattern to the other end of the second substrate-side wiring pattern.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: January 7, 2020
    Assignee: AZBIL CORPORATION
    Inventors: Osamu Momose, Hiroyuki Inagaki, Kouichi Mamada, Yoshio Yamazaki, Takumi Yamashita
  • Publication number: 20190285445
    Abstract: A first connection line includes a first tube-side wiring pattern formed on an outer periphery of a measuring tube and connected at one end thereof to a first surface electrode, a first substrate-side wiring pattern formed on a preamplifier substrate and connected at one end thereof to a preamplifier, and a first jumper wire connecting the other end of the first tube-side wiring pattern to the other end of the first substrate-side wiring pattern; and a second connection line includes a second tube-side wiring pattern formed on the outer periphery of the measuring tube and connected at one end thereof to a second surface electrode, a second substrate-side wiring pattern formed on the preamplifier substrate and connected at one end thereof to the preamplifier, and a second jumper wire connecting the other end of the second tube-side wiring pattern to the other end of the second substrate-side wiring pattern.
    Type: Application
    Filed: March 12, 2019
    Publication date: September 19, 2019
    Applicant: AZBIL CORPORATION
    Inventors: Osamu MOMOSE, Hiroyuki INAGAKI, Kouichi MAMADA, Yoshio YAMAZAKI, Takumi YAMASHITA
  • Publication number: 20190285446
    Abstract: A preamplifier substrate on which a preamplifier is mounted, the preamplifier being configured to amplify electromotive forces detected by a pair of surface electrodes, is disposed outside a flux region where a magnetic flux is produced, and the preamplifier substrate extends in a direction intersecting a measuring tube.
    Type: Application
    Filed: March 12, 2019
    Publication date: September 19, 2019
    Applicant: AZBIL CORPORATION
    Inventors: Osamu MOMOSE, Hiroyuki INAGAKI, Kouichi MAMADA, Yoshio YAMAZAKI, Takumi YAMASHITA
  • Publication number: 20190086248
    Abstract: A thermal type flowmeter includes a sensor and a flow-rate calculating unit. The sensor includes a heater that heats a fluid to be measured. The sensor is configured to output a sensor value corresponding to a state of thermal diffusion in the fluid heated by the heater which is being driven in such a manner that a difference between a temperature of the heater and a temperature of the fluid at a location free from thermal influence of the heater is equal to a predetermined temperature difference. The flow-rate calculating unit is configured to calculate a flow rate of the fluid from the sensor value by using a flow-rate calculation equation, “sensor value=transformation coefficient A×log (flow rate)2+transformation coefficient B×log (flow rate)+transformation coefficient C”.
    Type: Application
    Filed: September 13, 2018
    Publication date: March 21, 2019
    Applicant: AZBIL CORPORATION
    Inventors: Yoshio YAMAZAKI, Hidenori HIBI
  • Publication number: 20190049278
    Abstract: A thermal type flowmeter includes a sensor, a correcting unit, and a flow-rate calculating unit. The sensor outputs a sensor value (first value) corresponding to the state of thermal if fusion in a fluid heated by a heater which is being driven in such a manner that the difference between the temperature of the heater and the temperature of the fluid at a location free from thermal influence of the heater is equal to a predetermined temperature difference. The correcting unit calculates a corrected sensor value (second value) by correcting the sensor value output by the sensor, in accordance with the temperature of the fluid, and outputs the corrected sensor value. The flow-rate calculating unit calculates the flow rate of the fluid from the corrected sensor value calculated by the correcting unit.
    Type: Application
    Filed: August 7, 2018
    Publication date: February 14, 2019
    Applicant: AZBIL CORPORATION
    Inventors: Yoshio YAMAZAKI, Shinsuke Matsunaga, Shigeru Aoshima
  • Publication number: 20190041248
    Abstract: A sensor unit includes a heater that heats a measurement target fluid, and outputs a sensor value that corresponds to a thermal diffusion state of the fluid heated by the heater when the heater is driven so that a difference between a temperature of the heater and a temperature of the fluid at a position where there is no thermal effect of the heater is to be equal to a set temperature difference. A processing unit calculates an estimated value obtained by multiplying the sensor value by a value obtained by dividing the set temperature difference by a difference between the temperature of the heater and a measured temperature of the fluid. A flow rate calculation unit calculates a flow rate of the fluid from the estimated value.
    Type: Application
    Filed: July 19, 2018
    Publication date: February 7, 2019
    Applicant: AZBIL CORPORATION
    Inventors: Yoshio Yamazaki, Shinsuke Matsunaga
  • Publication number: 20190033108
    Abstract: A thermal flowmeter includes a casing, a ferrule, a measuring tube penetrating through the ferrule, a sensor for flow rate detection, a joint shaft movably supported by end portions of the casing, one end portion of the joint shaft being connected to the measuring tube and the ferrule with a through hole of the joint shaft and a hollow portion of the measuring tube communicating with each other, the other end portion of the joint shaft sticking out of the casing, and a screw thread-fitted to each of the end portions of the casing, and including a pressing portion pressing the joint shaft into an inside of the casing. A seal structure includes a first tapered surface formed on the ferrule and a second tapered surface formed on the joint shaft and fitting the first tapered surface, and is provided between the ferrule and the joint shaft.
    Type: Application
    Filed: July 24, 2018
    Publication date: January 31, 2019
    Applicant: AZBIL CORPORATION
    Inventors: Yoshio YAMAZAKI, Yasuhiko ODA
  • Publication number: 20190033110
    Abstract: A thermal flowmeter includes: a first thermal resistive element disposed on a pipe and sensing a first temperature of a fluid; a second thermal resistive element disposed on the pipe downstream relative to the first thermal resistive element and sensing a second temperature thereof; a control unit causing the second thermal resistive element to generate heat so that the second temperature is kept higher than the first temperature by a predetermined value; a power measurement unit measuring a power supplied to the second thermal resistive element; a temperature difference gradient calculation unit calculating a gradient of a difference between the second and first temperatures; a power compensation unit compensating the measured power based on the gradient of the difference and a value of the power when no fluid is in the pipe; and a flow rate calculation unit calculating a flow rate of the fluid based on the compensated power.
    Type: Application
    Filed: July 30, 2018
    Publication date: January 31, 2019
    Applicant: AZBIL CORPORATION
    Inventors: Yuusei YANAGAWA, Yoshio Yamazaki, Shinsuke Matsunaga, Wataru Hasebe
  • Publication number: 20190025104
    Abstract: A thermal flowmeter includes a first thermal resistance element that detects a first temperature of a fluid, a second thermal resistance element disposed downstream to detect a second temperature of the fluid, a control unit that causes the second thermal resistance element to heat to make the second temperature higher than the first temperature by a fixed value, a power measurement unit that measures a power applied to the second thermal resistance element, a power conversion unit that multiplies the power measured by the power measurement unit, by a constant uniquely determined depending on the fluid, thereby converting the power to a power required when the fluid is water, and a flow rate calculation unit that calculates a flow rate of the fluid, by converting the power converted by the power conversion unit to a value of the flow rate, using a flow rate conversion characteristic formula applicable to water.
    Type: Application
    Filed: July 17, 2018
    Publication date: January 24, 2019
    Applicant: AZBIL CORPORATION
    Inventors: Yuusei YANAGAWA, Yoshio YAMAZAKI, Shinsuke MATSUNAGA, Shigeru AOSHIMA
  • Patent number: 9267827
    Abstract: An excitation circuit, which is used in an electromagnetic flow meter, measures a flow rate value for a fluid, based on an electromotive force. An excitation coil, which is provided on an outside of a measurement tube, is supplied with an excitation current, where, in response, the electromotive force, which is perpendicular to a magnetic field of the excitation coil that is generated in the fluid within the measurement tube, is detected by a pair of electrodes provided on the measurement tube.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 23, 2016
    Assignee: AZBIL CORPORATION
    Inventors: Osamu Momose, Hideo Sawada, Ichiro Mitsutake, Yoshio Yamazaki
  • Patent number: 8980167
    Abstract: There is provided a cost-effective stainless steel pipe having excellent expandability for oil country tubular goods, the stainless steel pipe having excellent CO2 corrosion resistance under a severe corrosive environment containing CO2, Cl?, and the like. The stainless steel pipe having excellent expandability for oil country tubular goods contains 0.05% or less C, 0.50% or less Si, Mn: 0.10% to 1.50%, 0.03% or less P, 0.005% or less S, 10.5% to 17.0% Cr, 0.5% to 7.0% Ni, 3.0% or less Mo, 0.05% or less Al, 0.20% or less V, 0.15% or less N, and 0.008% or less O, optionally at least one selected from Nb, Cu, Ti, Zr, Ca, B, and W, in a specific content, and the balance being Fe and incidental impurities, wherein a microstructure mainly having a tempered martensitic phase has an austenitic phase content exceeding 20%.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: March 17, 2015
    Assignee: JFE Steel Corporation
    Inventors: Mitsuo Kimura, Yoshio Yamazaki, Masahito Tanaka
  • Publication number: 20150040682
    Abstract: An excitation circuit, which is used in an electromagnetic flow meter, measures a flow rate value for a fluid, based on an electromotive force. An excitation coil, which is provided on an outside of a measurement tube, is supplied with an excitation current, where, in response, the electromotive force, which is perpendicular to a magnetic field of the excitation coil that is generated in the fluid within the measurement tube, is detected by a pair of electrodes provided on the measurement tube.
    Type: Application
    Filed: March 15, 2013
    Publication date: February 12, 2015
    Applicant: AZBIL CORPORATION
    Inventors: Osamu Momose, Hideo Sawada, Ichiro Mitsutake, Yoshio Yamazaki
  • Patent number: 8512487
    Abstract: A seamless expandable oil country tubular article, which has a superior pipe expansion property in a expanding process at an expand ratio of more than about 30% although having a high strength such as a tensile strength (TS) of about 600 MPa or more, and a manufacturing method thereof, the seamless expandable oil country tubular goods being in an as-rolled state or being processed, optionally necessary, by inexpensive nonthermal-refining type heat treatment.
    Type: Grant
    Filed: October 18, 2004
    Date of Patent: August 20, 2013
    Assignee: JFE Steel Corporation
    Inventors: Yoshio Yamazaki, Yukio Miyata, Mitsuo Kimura, Kei Sakata, Masahito Tanaka
  • Patent number: 8136412
    Abstract: An electromagnetic flowmeter includes a measuring tube, electrodes, an exciting coil for applying, to a fluid, a time-changing magnetic field asymmetrical with respect to a plane PLN, a signal conversion unit which extracts a ?A/?t component, irrelevant to a fluid flow velocity, from a resultant electromotive force of an electromotive force based on the ?A/?t component and an electromotive force based on a v×B component originating from the flow velocity of the fluid, a flow rate output unit which removes a variation factor for a span as a coefficient applied to a magnitude V of a flow velocity of the v×B component in the resultant electromotive force, based on the extracted ?A/?t component, and calculates a flow rate of the fluid from a result obtained by removing the variation factor, and signal lines inclined with respect to a direction of the magnetic field in parallel with the plane PLN.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: March 20, 2012
    Assignee: Yamatake Corporation
    Inventors: Tomoshige Yamamoto, Daisuke Akita, Yoshio Yamazaki, Kenji Yao
  • Patent number: 8120370
    Abstract: The surface of a signal electrode is treated as substrate treatment. An oxide film on the surface of the signal electrode is removed by roughing. The roughened surface is used as a surface treated face. A coating of fluororesin is provided on the surface treated face for lining or thermal welding to the lining material. A signal electrode is provided in the resin lining. Since the oxide film was removed from the surface of the signal electrode for roughening, the adhesive force of the coating of the fluororesin is increased. The fluororesin coating and the resin lining melt each other, and the fluororesin coating is strongly bonded to the resin lining. The adhesion between the signal electrode and the resin lining is increased without opening a hole in the signal electrode. A method uses a primer film formed by substrate treatment on the surface of the signal electrode.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: February 21, 2012
    Assignee: Yamatake Corporation
    Inventors: Yutaka Harada, Keiji Kanehara, Yoshio Yamazaki