Patents by Inventor Masami Wada

Masami Wada 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: 10558202
    Abstract: A signal transmission circuit includes a first photocoupler to which a transmission signal is input, an edge detection circuit which is disposed in a primary side of the first photocoupler, the edge detection circuit being configured to detect a rising edge and a falling edge of the transmission signal, and an edge demodulation circuit which is disposed in a secondary side of the first photocoupler, the demodulation circuit being configured to demodulate the transmission signal by using only one of the rising edge and the falling edge of an edge detection signal output from the edge detection circuit via the first photocoupler.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: February 11, 2020
    Assignee: Yokogawa Electric Corporation
    Inventors: Tatsuro Endo, Masami Wada
  • Publication number: 20200014017
    Abstract: A method of manufacturing an electrode sheet by using an electrode sheet manufacturing apparatus for manufacturing the electrode sheet includes a feeding step of feeding out a sheet body from a roll on which the sheet body is wound, the sheet body including an active layer containing a catalyst laminated on a support layer, and a cutting step of forming the electrode sheet by punching the sheet body by pressing a cutting blade from a side of the support layer against the sheet body that was fed out in the feeding step.
    Type: Application
    Filed: July 2, 2019
    Publication date: January 9, 2020
    Inventors: Keisuke Katayama, Takuto Hayakawa, Yusuke Wada, Masami Kurimoto
  • Publication number: 20180039256
    Abstract: A signal transmission circuit includes a first photocoupler to which a transmission signal is input, an edge detection circuit which is disposed in a primary side of the first photocoupler, the edge detection circuit being configured to detect a rising edge and a falling edge of the transmission signal, and an edge demodulation circuit which is disposed in a secondary side of the first photocoupler, the demodulation circuit being configured to demodulate the transmission signal by using only one of the rising edge and the falling edge of an edge detection signal output from the edge detection circuit via the first photocoupler.
    Type: Application
    Filed: July 25, 2017
    Publication date: February 8, 2018
    Applicant: Yokogawa Electric Corporation
    Inventors: Tatsuro ENDO, Masami WADA
  • Patent number: 9518854
    Abstract: A resonance circuit is configured to receive a pulse density signal obtained by ??-modulating an analog displacement signal by a ?? modulator and a multi-bit signal obtained from the pulse density signal and to generate an excitation signal based on the pulse density signal and the multi-bit signal. The resonance circuit includes an amplification factor controller configured to set an amplification factor depending on a vibration signal obtained from the multi-bit signal, a multiplier configured to amplify a level of the pulse density signal by the amplification factor, and a circuit group configured to generate the excitation signal based on a pulse density signal obtained by further ??-modulating an output of the multiplier. The amplification factor controller is configured to set the amplification factor using a proportional control and an integral control based a difference between an amplitude signal obtained from the vibration signal and a target amplitude value.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: December 13, 2016
    Assignee: YOKOGAWA ELECTRIC CORPORATION
    Inventors: Yuki Ikadai, Masami Wada
  • Publication number: 20160231156
    Abstract: A resonance circuit is configured to receive a pulse density signal obtained by ??-modulating an analog displacement signal by a ?? modulator and a multi-bit signal obtained from the pulse density signal and to generate an excitation signal based on the pulse density signal and the multi-bit signal. The resonance circuit includes an amplification factor controller configured to set an amplification factor depending on a vibration signal obtained from the multi-bit signal, a multiplier configured to amplify a level of the pulse density signal by the amplification factor, and a circuit group configured to generate the excitation signal based on a pulse density signal obtained by further ??-modulating an output of the multiplier. The amplification factor controller is configured to set the amplification factor using a proportional control and an integral control based a difference between an amplitude signal obtained from the vibration signal and a target amplitude value.
    Type: Application
    Filed: February 4, 2016
    Publication date: August 11, 2016
    Applicant: Yokogawa Electric Corporation
    Inventors: Yuki IKADAI, Masami WADA
  • Patent number: 9182783
    Abstract: A synchronization apparatus synchronizing an operation of a first processing unit pre-processing an input signal and an operation of a second processing unit post-processing on signal from the first processing unit, may include: a counting unit that operates with a period sufficiently shorter than a period of a first reference signal governing timing of pre-processing in the first processing unit, and outputting, when counting a set target count value, a second reference signal governing timing of post-processing in the second processing unit; a phase control unit that generates a control value controlling a phase difference of the second reference signal with respect to the first reference signal in accordance with a count value when the first reference signal is input; and a filter unit that filters the generated control value so as to determine the target count value to be set in the counting unit.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: November 10, 2015
    Assignee: YOKOGAWA ELECTRIC CORPORATION
    Inventor: Masami Wada
  • Patent number: 8776614
    Abstract: First and second ?? modulators convert output signals of two sensors into pulse density signals. First and second LPFs convert the pulse density signals into multi-bit signals. A signal computing module calculates a mass flow rate based on the multi-bit signals. A resonance circuit generates an excitation signal based on the output signals of the sensors. A drive output module amplifies the excitation signal. An exciter excites the measurement tube using an amplified excitation signal. A multiplier amplifies one of the pulse density signals to generate a multi-bit signal. An amplification factor controller controls an amplification factor of the multiplier based on the multi-bit signal. A third ?? modulator converts an amplified signal into a pulse density signal. A DAC generates the excitation signal based on the pulse density signal.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: July 15, 2014
    Assignee: Yokogawa Electric Corporation
    Inventor: Masami Wada
  • Publication number: 20130254582
    Abstract: A synchronization apparatus synchronizing an operation of a first processing unit pre-processing an input signal and an operation of a second processing unit post-processing on signal from the first processing unit, may include: a counting unit that operates with a period sufficiently shorter than a period of a first reference signal governing timing of pre-processing in the first processing unit, and outputting, when counting a set target count value, a second reference signal governing timing of post-processing in the second processing unit; a phase control unit that generates a control value controlling a phase difference of the second reference signal with respect to the first reference signal in accordance with a count value when the first reference signal is input; and a filter unit that filters the generated control value so as to determine the target count value to be set in the counting unit.
    Type: Application
    Filed: March 18, 2013
    Publication date: September 26, 2013
    Applicant: YOKOGAWA ELECTRIC CORPORATION
    Inventor: Masami WADA
  • Publication number: 20120096950
    Abstract: First and second ?? modulators convert output signals of two sensors into pulse density signals. First and second LPFs convert the pulse density signals into multi-bit signals. A signal computing module calculates a mass flow rate based on the multi-bit signals. A resonance circuit generates an excitation signal based on the output signals of the sensors. A drive output module amplifies the excitation signal. An exciter excites the measurement tube using an amplified excitation signal. A multiplier amplifies one of the pulse density signals to generate a multi-bit signal. An amplification factor controller controls an amplification factor of the multiplier based on the multi-bit signal. A third ?? modulator converts an amplified signal into a pulse density signal. A DAC generates the excitation signal based on the pulse density signal.
    Type: Application
    Filed: October 20, 2011
    Publication date: April 26, 2012
    Applicant: YOKOGAWA ELECTRIC CORPORATION
    Inventor: Masami WADA
  • Patent number: 7123938
    Abstract: A card device to be inserted into a slot of an electronic apparatus having an electronic apparatus ground and electrically connected to this electronic apparatus, including a single antenna provided on a carrier, a card ground which is disposed on the carrier and electrically connected to the antenna, and a switch for carrying out, at a high frequency, a connection/disconnection of the card ground to/from the electronic apparatus ground in a condition where this card device is inserted in the slot.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: October 17, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shouichi Koga, Michinori Kishimoto, Toshiyuki Wakisaka, Masami Wada
  • Patent number: 7073475
    Abstract: A power generator unit incorporates a generator driven by an engine. The engine has a fuel tank. A fuel petcock is connected through fuel hoses between the fuel tank and the engine. An insulating cover surrounds the generator, the engine and the fuel tank. A control panel is positioned on the insulating cover. A fuel control lever is pivotally mounted on the control panel. The fuel control lever is connected to the fuel petcock through a flexible transmitter to open and close the fuel petcock.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: July 11, 2006
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Masami Wada
  • Patent number: 7049925
    Abstract: Plural magnetic sheets (22) are laminated in circumference direction to form a cylindrical laminated core. Magnetic sheets (22) adjacent to each other have coupling point (25) at an upper section or a lower section and gap (26) on an opposite side of coupling point (25). Coupling point (25) is prepared at upper section (23), then lower section (24), and upper section (23) then lower section (24) alternately. This structure allows assembling a radial laminated core with ease.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: May 23, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shinichiro Kawano, Hiroshi Ueda, Mikio Hirano, Masami Wada
  • Patent number: 7035612
    Abstract: An antenna diversity communications device switches communications paths between a plurality of antennas to improve reception in a frequency diversity communications system. Antenna selection is done in response to measurement of the receiving condition of the selected antenna. A memory unit stores frequency difference information between the current channel and the next channel. When the frequency difference between the current channel and the next channel is small enough to predict good correlation between the channels, and if current receiving conditions are good, the current channel remains connected. When the frequency difference between the current channel and the next channel is large enough to predict poor correlation, or if the receiving conditions on the current channel are bad, one of the other channels is selected.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: April 25, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Michinori Kishimoto, Toshiyuki Wakisaka, Shoichi Koga, Masami Wada
  • Publication number: 20050190725
    Abstract: Reception level frequency distribution is determined. A frequency correlation bandwidth is determined in accordance with intervals between peaks or dips, or alternatively intervals between intersections wherein the reception level frequency distribution intersects a threshold. At the time of reception start, a training mode period is set up to determine a frequency correlation bandwidth. After the training mode period, signals are received in accordance with the determined frequency correlation bandwidth. The frequency correlation bandwidth is determined with increased precision to avoid a large amount of calculation such as Fourier transform. As a result, the entire diversity reception processing requires a reduced amount of calculation.
    Type: Application
    Filed: October 2, 2003
    Publication date: September 1, 2005
    Inventors: Toshiyuki Wakisaka, Shouichi Koga, Michinori Kishimoto, Masami Wada
  • Publication number: 20040025325
    Abstract: Plural magnetic sheets (22) are laminated in circumference direction to form a cylindrical laminated core. Magnetic sheets (22) adjacent to each other have coupling point (25) at an upper section or a lower section and gap (26) on an opposite side of coupling point (25). Coupling point (25) is prepared at upper section (23), then lower section (24), and upper section (23) then lower section (24) alternately. This structure allows assembling a radial laminated core with ease.
    Type: Application
    Filed: August 7, 2003
    Publication date: February 12, 2004
    Inventors: Shinichiro Kawano, Hiroshi Ueda, Mikio Hirano, Masami Wada
  • Publication number: 20030183180
    Abstract: A power generator unit incorporates a generator driven by an engine. The engine has a fuel tank. A fuel petcock is connected through fuel hoses between the fuel tank and the engine. An insulating cover surrounds the generator, the engine and the fuel tank. A control panel is positioned on the insulating cover. A fuel control lever is pivotally mounted on the control panel. The fuel control lever is connected to the fuel petcock through a flexible transmitter to open and close the fuel petcock.
    Type: Application
    Filed: March 25, 2003
    Publication date: October 2, 2003
    Inventor: Masami Wada
  • Publication number: 20030017849
    Abstract: A card device to be inserted into a slot of an electronic apparatus having an electronic apparatus ground and electrically connected to this electronic apparatus, including a single antenna provided on a carrier, a card ground which is disposed on the carrier and electrically connected to the antenna, and a switch for carrying out, at a high frequency, a connection/disconnection of the card ground to/from the electronic apparatus ground in a condition where this card device is inserted in the slot.
    Type: Application
    Filed: July 17, 2002
    Publication date: January 23, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shouichi Koga, Michinori Kishimoto, Toshiyuki Wakisaka, Masami Wada
  • Patent number: 6480812
    Abstract: The invention encompasses a vortex flowmeter for measuring the flow rate of a fluid by detecting an alternating signal produced by Karman vortices using a sensor comprising a low pass filter for passing the frequency band of the alternating signal that is determined by the diameter and flow rate range of the vortex flowmeter; subband filters for splitting the frequency band passing through the low pass filter into a plurality of component bands; a spectrum analyzer for analyzing the plurality of component bands; and a bandpass filter for passing a frequency band to be measured according to the analysis results of the spectrum analyzer, thereby providing flow rate measurement with high precision.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: November 12, 2002
    Assignee: Yokogawa Electric Corporation
    Inventors: Masami Wada, Masanori Hondo, Tetsuo Andoh
  • Publication number: 20020118724
    Abstract: An antenna diversity communications device switches communications paths between a plurality of antennas to improve reception in a frequency diversity communications system. Antenna selection is done in response to measurement of the receiving condition of the selected antenna. A memory unit stores frequency difference information between the current channel and the next channel. When the frequency difference between the current channel and the next channel is small enough to predict good correlation between the channels, and if current receiving conditions are good, the current channel remains connected. When the frequency difference between the current channel and the next channel is large enough to predict poor correlation, or if the receiving conditions on the current channel are bad, one of the other channels is selected.
    Type: Application
    Filed: January 16, 2002
    Publication date: August 29, 2002
    Inventors: Michinori Kishimoto, Toshiyuki Wakisaka, Shoichi Koga, Masami Wada
  • Patent number: 6232902
    Abstract: A sigma-delta analog-to-digital (A/D) converter comprising an input terminal, an adder, an integrator, a comparator and a flip flop circuit connected in series, with an output signal of the flip flop circuit being provided at an output terminal, and being fed back to the adder through a digital-to-analog (D/A) converter, so that the A/D converter provides a pulse density signal corresponding to a given input signal, wherein the comparator output is isolated from the input terminal of the flip flop circuit, and the output of the flip flop circuit is isolated from the D/A converter input terminal thereby achieving reduction of current consumption. The invention is useful in two wire vortex flowmeters, for example.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: May 15, 2001
    Assignee: Yokogawa Electric Corporation
    Inventor: Masami Wada