Patents by Inventor Hiroyuki Toda
Hiroyuki Toda 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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Publication number: 20170363749Abstract: An attitude angle may be calculated with high precision. In a traveling state calculating device, receiving parts may output data for calculation using positioning signals received by antennas, respectively. A phase difference calculating part may calculate a single phase difference for every base line based on the data for calculation outputted by the receivers. An attitude angle calculating part may calculate an attitude angle using the data for calculation and the single phase difference. A calculating condition determining part may determine a contribution of the data for calculation to the calculation of the attitude angle, corresponding to the component of the attitude angle, based on a spatial relationship between the base line and the positioning satellite.Type: ApplicationFiled: November 26, 2015Publication date: December 21, 2017Inventors: Naomi Fujisawa, Hiroyuki Toda, Akihiro Hino, Hiraku Nakamura, Takeshi Nagano, Soichiro Etani, Masashi Sugimoto
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Publication number: 20170350988Abstract: A small-sized state calculating device which may acquire a highly-precise state calculation value is provided. The state calculating device may include antennas, receiving parts, a phase difference calculating part and an operation part. The receiving parts may calculate carrier phase measurements PYA, PYB and PYC of GNSS signals received by the antennas, respectively. The phase difference calculating part may set the antennas to be switched between a master antenna and a slave antenna, and calculate the plurality of inter-antenna phase differences ??AB, ??BC and ??CA, for every combination of the master antenna and the slave antenna, using the carrier phase measurements PYA, PYB and PYC. The operation part may calculate an attitude angle AT using the plurality of inter-antenna phase differences ??AB, ??BC and ??CA.Type: ApplicationFiled: November 26, 2015Publication date: December 7, 2017Applicant: Furuno Electric Co., Ltd.Inventors: Hiraku Nakamura, Naomi Fujisawa, Hiroyuki Toda, Takeshi Nagano
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Patent number: 9714841Abstract: A satellite and/or dead-reckoning navigation integrated positioning device with improved accuracy including position, velocity, etc. is disclosed. A tracking processing module performs, based on a GPS signal, acquisition and tracking thereof and demodulation of a navigation message. A GPS calculation module calculates position, velocity, and the like based on pseudo-range and Doppler frequency observations, and ephemeris data and gives the calculations to output judgment and tracking processing modules. Based on external support information including inertial sensor output, map information or information about differences between map position and measured position, along with the pseudo-range and Doppler observations, an integrated positioning calculation module estimates position, velocity, and the like, and gives the estimates to the output judgment module.Type: GrantFiled: March 21, 2013Date of Patent: July 25, 2017Assignee: FURUNO ELECTRIC COMPANY LIMITEDInventors: Hiroyuki Toda, Masaki Suyama, Hiroshi Hamada, Mika Tanaka (Ninomiya), Kunihiko Hashimoto
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Publication number: 20160061854Abstract: A velocity calculating device is provided, which can accurately calculate a moving velocity of a movable body without depending on signals obtained externally. A navigation device includes an acceleration acquiring module, an angular velocity acquiring module, a time difference detecting module, and a velocity calculating module. The acceleration acquiring module acquires the vertical acceleration of one of the axle of the front wheels and the axle of the rear wheels. The angular velocity acquiring module acquires a pitch angular velocity of the automobile. The time difference detecting module detects a time difference between the acceleration in the vertical directions and the pitch angular velocity. The velocity calculating module calculates a moving velocity of the automobile based on a rate of a wheelbase with respect to the time difference.Type: ApplicationFiled: March 11, 2014Publication date: March 3, 2016Inventors: Youji Takayama, Hiroyuki Toda
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Patent number: 8965690Abstract: Even when inertial navigation is performed, whether or not the correction of a value detected by an external sensor is appropriate can be judged, so that a dramatically degraded positioning result is prevented from being outputted. A navigation device (100) comprises a GPS receiver (11), an acceleration sensor (12) for detecting at least two-axis accelerations in an X-axis direction that is the front-back direction of a moving body and a Y-axis direction that is the right-left direction of the moving body, and a at least one-axis angular velocity sensor (13) for detecting the angular velocity in an azimuth direction around a Z-axis orthogonal to the X-axis direction and the Y-axis direction.Type: GrantFiled: January 21, 2009Date of Patent: February 24, 2015Assignee: Furuno Electrics Co., Ltd.Inventor: Hiroyuki Toda
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Patent number: 8649977Abstract: In a GPS composite navigation apparatus of a configuration having a GPS receiver, variation in an estimated position, an estimated velocity, and an estimated azimuth of a moving body when the moving body is not moving is resolved, and the GPS/INS integrated navigation system with good response characteristics from a stationary state to a moving state. A stationary detector for determining the stationary state of the moving body is provided, and when it is determined to be the stationary state by the stationary detector, a measurement model used for measurement-update of a Kalman filter is changed, while a changed amount of an error covariance matrix by the update is corrected.Type: GrantFiled: November 26, 2007Date of Patent: February 11, 2014Assignee: Furuno Electric Company LimitedInventor: Hiroyuki Toda
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Publication number: 20130311085Abstract: A satellite and/or dead-reckoning navigation integrated positioning device with improved accuracy including position, velocity, etc. is disclosed. A tracking processing module performs, based on a GPS signal, acquisition and tracking thereof and demodulation of a navigation message. A GPS calculation module calculates position, velocity, and the like based on pseudo-range and Doppler frequency observations, and ephemeris data and gives the calculations to output judgment and tracking processing modules. Based on external support information including inertial sensor output, map information or information about differences between map position and measured position , along with the pseudo-range and Doppler observations, an integrated positioning calculation module estimates position, velocity, and the like, and gives the estimates to the output judgment module.Type: ApplicationFiled: March 21, 2013Publication date: November 21, 2013Inventors: Hiroyuki TODA, Masaki SUYAMA, Hiroshi HAMADA, Mika TANAKA (NINOMIYA), Kunihiko HASHIMOTO
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Publication number: 20130238277Abstract: An angular velocity detecting device which can estimate and detect correct mounting angles of a gyro sensor is achieved using outputs from the gyro sensor. The gyro sensor measures angular velocities in a sensor coordinate system and outputs them to an angular velocity calculating unit. A bias component removing unit of the angular velocity calculating unit carries out time average processing of the sensor coordinate system angular velocities, divides the sensor coordinate system angular velocities by time average values, and outputs them to a misalignment angle estimating unit. The misalignment angle estimating unit calculates, during a period in which a movable body is turning, a roll direction misalignment angle ?? using an angular velocity ?yse in a pitch angle ? direction and an angular velocity ?zse in a heading ? direction in the sensor coordinate system.Type: ApplicationFiled: July 15, 2011Publication date: September 12, 2013Applicant: FURUNO ELECTRIC CO., LTD.Inventors: Hiroshi Sasakura, Hiroyuki Toda
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Patent number: 8149163Abstract: To provide a GPS compound device having a configuration including a GPS receiver, that accurately determines abnormality in an output from the GPS receiver based on a difference between a GPS pseudorange measurement and a Doppler frequency measurement, when detecting the abnormality in the outputs from the GPS receiver, while avoiding continuation of the abnormality at the time of the abnormality determination resulting from estimation errors of the GPS pseudorange measurement and the Doppler frequency measurement. When the abnormality of the outputs from the GPS receiver are detected, an abnormal period is counted. When the count value is below a predetermined threshold, the outputs from the GPS receiver are treated as abnormal, and after it exceeded the threshold, the outputs from the GPS receiver are treated as normal. Thus, the abnormality of the outputs from the GPS receiver can be determined accurately.Type: GrantFiled: November 26, 2007Date of Patent: April 3, 2012Assignee: Furuno Electric Company LimitedInventor: Hiroyuki Toda
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Publication number: 20120041702Abstract: To accurately calculate an attached angle of an accelerometer and accurately correct an acceleration that is obtained from the accelerometer: a frequency analyzing module of an acceleration corrector divides a sensor coordinate system acceleration into a bias frequency component, a gravity frequency component, a movement acceleration frequency component, and a noise frequency component, through a wavelet transform. The frequency analyzing module outputs a sum component of the gravity frequency component and the movement acceleration frequency component to an attached angle estimating module and a correcting operation module. The attached angle estimating module estimation-calculates the attached angle of an accelerometer and outputs it to the correcting operation module.Type: ApplicationFiled: April 19, 2010Publication date: February 16, 2012Inventors: Hiroyuki Toda, Ken Yoshitake
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Patent number: 8103170Abstract: The present invention inputs a signal synthesized an optical pulse with a variable-wavelength laser beam different in wavelength from it to a delay unit (S1). The delay unit branches the signal to two optical signals, produces an optical path difference between them to afford a delay, synthesizes them again to generate a multiplexed optical signal, and minutely varies the optical path length of one of them (S2). The present invention measures output variance of the delay unit on a variable-wavelength laser beam resulting from the minute variance (S3), and controls the optical path difference so as to minimize output variance at a position where the output is a maximum or minimum, or is a specific value other than them (S4). This stabilizes a phase difference between adjacent pulses of the multiplexed optical signal outputted from the delay unit (5) with a simple construction in optical time division multiplexing technology.Type: GrantFiled: August 22, 2008Date of Patent: January 24, 2012Assignee: The DoshishaInventor: Hiroyuki Toda
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Patent number: 8014531Abstract: An adder mixes an L-channel sound signal and an R-channel sound signal with each other and then outputs a mixed signal. A switching unit performs a switching operation such that, if power is being supplied to loudspeaker amplifiers, the L-channel sound signal and the R-channel sound signal are respectively supplied to the loudspeaker amplifiers, and if power is not being supplied to the loudspeaker amplifier, an output signal of the adder is supplied to the loudspeaker amplifier. A power down control unit forces a loudspeaker amplifier to which power is not supplied and a preamplifier for driving the loudspeaker amplifier to be in a power-down state.Type: GrantFiled: January 9, 2007Date of Patent: September 6, 2011Assignee: Yamaha CorporationInventor: Hiroyuki Toda
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Publication number: 20110106450Abstract: Disclosed is a satellite navigation/dead-reckoning navigation integrated positioning device with improved accuracy of navigation data including position, velocity, and the like, which can be constituted at low cost. A tracking processing module (31) performs, based on a GPS positioning signal, acquisition processing and tracking processing thereof and demodulation processing of a navigation message. A GPS positioning calculation module (32) calculates position, velocity, and the like based on a pseudo-range observation, a Doppler frequency observation, and ephemeris data and gives the calculated position, velocity, and the like to an output judgment module (43) and the tracking processing module (31).Type: ApplicationFiled: January 20, 2009Publication date: May 5, 2011Applicant: FURUNO ELECTRIC CO., LTD.Inventors: Hiroyuki Toda, Masaki Suyama, Hiroshi Hamada, Mika Tanaka, Kunihiko Hashimoto
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Publication number: 20100332135Abstract: Even when inertial navigation is performed, whether or not the correction of a value detected by an external sensor is appropriate can be judged, so that a dramatically degraded positioning result is prevented from being outputted. A navigation device (100) comprises a GPS receiver (11), an acceleration sensor (12) for detecting at least two-axis accelerations in an X-axis direction that is the front-back direction of a moving body and a Y-axis direction that is the right-left direction of the moving body, and a at least one-axis angular velocity sensor (13) for detecting the angular velocity in an azimuth direction around a Z-axis orthogonal to the X-axis direction and the Y-axis direction.Type: ApplicationFiled: January 21, 2009Publication date: December 30, 2010Inventor: Hiroyuki Toda
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Publication number: 20100283670Abstract: To provide a GPS compound device having a configuration including a GPS receiver, that accurately determines abnormality in an output from the GPS receiver based on a difference between a GPS pseudorange measurement and a Doppler frequency measurement, when detecting the abnormality in the outputs from the GPS receiver, while avoiding continuation of the abnormality at the time of the abnormality determination resulting from estimation errors of the GPS pseudorange measurement and the Doppler frequency measurement. When the abnormality of the outputs from the GPS receiver are detected, an abnormal period is counted. When the count value is below a predetermined threshold, the outputs from the GPS receiver are treated as abnormal, and after it exceeded the threshold, the outputs from the GPS receiver are treated as normal. Thus, the abnormality of the outputs from the GPS receiver can be determined accurately.Type: ApplicationFiled: October 26, 2007Publication date: November 11, 2010Applicant: Furuno Electric Company LimitedInventor: Hiroyuki Toda
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Publication number: 20100211315Abstract: In a GPS composite navigation apparatus of a configuration having a GPS receiver, variation in an estimated position, an estimated velocity, and an estimated azimuth of a moving body when the moving body is not moving is resolved, and the GPS/INS integrated navigation system with good response characteristics from a stationary state to a moving state. A stationary detector for determining the stationary state of the moving body is provided, and when it is determined to be the stationary state by the stationary detector, a measurement model used for measurement-update of a Kalman filter is changed, while a changed amount of an error covariance matrix by the update is corrected.Type: ApplicationFiled: November 26, 2007Publication date: August 19, 2010Applicant: Furuno Electric Company LimitedInventor: Hiroyuki Toda
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Patent number: 7589586Abstract: A high frequency signal detection circuit includes an input terminal for a high frequency signal to be detected, a switch transferring the high frequency signal as intermittent ringing signal to a first node in response to a pulse signal whose frequency is lower than that of the high frequency signal, a transistor amplifying the signal at the first node, and outputting to a second node, a bias generator generating a bias voltage by which the transistor is operated in its weak inversion region, a resonant circuit outputting the bias voltage to the first node, and resonating the high frequency signal, a capacitor removing a high frequency component of the signal at the second node; and a judgment circuit judging whether or not the high frequency signal is inputted by detecting the signal at the second node, which has the same frequency as the pulse signal.Type: GrantFiled: November 21, 2007Date of Patent: September 15, 2009Assignee: Oki Semiconductor Co., Ltd.Inventor: Hiroyuki Toda
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Patent number: 7590460Abstract: An audio signal processor is composed of a data path unit, a mode register and a state machine unit. The data path unit applies one or more arithmetical operation to an audio signal for performing signal processing of the audio signal. The mode register stores mode information specifying the signal processing to be performed by the data path unit. The state machine unit sequentially feeds control signals according to the mode information for enabling the data path unit to apply one or more arithmetical operation to the audio signal so as to perform the signal processing. The performed signal processing is composed of the one or more arithmetical operations, and is specified by the mode information stored in the mode register.Type: GrantFiled: October 28, 2004Date of Patent: September 15, 2009Assignee: Yamaha CorporationInventors: Naotoshi Nishioka, Hiroyuki Toda, Yasuyuki Muraki
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Publication number: 20090226175Abstract: The present invention inputs a signal synthesized an optical pulse with a variable-wavelength laser beam different in wavelength from it to a delay unit (S1). The delay unit branches the signal to two optical signals, produces an optical path difference between them to afford a delay, synthesizes them again to generate a multiplexed optical signal, and minutely varies the optical path length of one of them (S2) The present invention measures output variance of the delay unit on a variable-wavelength laser beam resulting from the minute variance (S3), and controls the optical path difference so as to minimize output variance at a position where the output is a maximum or minimum, or is a specific value other than them (S4). This stabilizes a phase difference between adjacent pulses of the multiplexed optical signal outputted from the delay unit (5) with a simple construction in optical time division multiplexing technology.Type: ApplicationFiled: August 22, 2008Publication date: September 10, 2009Inventor: Hiroyuki Toda
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Patent number: 7466817Abstract: Tone generating sequence data are sequentially read out in accordance with a performance sequence, and tone generation control parameters are decoded from the read-out sequence data. The decoded tone generation control parameters are sequentially written into a control register. Tone signals are generated on the basis of the tone generation control parameters written in the control register. Pattern register stores pattern data representative of a time series of driven states to be taken by a plurality of light emitting elements. On the basis of the tone generation control parameters written in the control register, the pattern data stored in the pattern register are sequentially output to illuminate the light emitting elements. Particular pattern data may be stored in association with a particular caller so that, when an incoming call has been received from the particular caller, the pattern data specific to the particular caller are read out to illuminate the light emitting elements.Type: GrantFiled: October 21, 2004Date of Patent: December 16, 2008Assignee: Yamaha CorporationInventor: Hiroyuki Toda