Patents by Inventor Wataru Tsujita
Wataru Tsujita 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: 20190241118Abstract: Provided are: an inclination angle calculating unit for calculating, when having determined that a vehicle is stationary by referring to vehicle information indicating a traveling state of the vehicle, an inclination angle of the vehicle during a stationary period using inclination angle information indicating an inclination angle of the vehicle and determining a vehicle inclination angle during the stationary period from the calculated inclination angle of the vehicle; and a correction determination processing unit for determining whether an absolute value of a difference between the determined vehicle inclination angle and a reference angle determined previously by the inclination angle calculating unit is less than a first threshold value (threshold value ?) and, if the absolute value of the difference is less than the first threshold value (threshold value ?), performing a correction to rewrite the vehicle inclination angle to the reference angle.Type: ApplicationFiled: October 25, 2016Publication date: August 8, 2019Applicant: Mitsubishi Electric CorporationInventors: Takao FUKUNAGA, Wataru TSUJITA, Tsutomu ASAHINA
-
Publication number: 20190217856Abstract: A parking assistance device includes a pair of left and right sonar devices provided in a vehicle, an obstacle detection controller for determining whether an obstacle present within a determination target distance range on a side of the vehicle is a wall or a curb by comparing a level value of a reflection wave received by one of the sonar devices with each of a first threshold value and a second threshold value that are different from each other, and an automatic parking controller for setting a guiding route for automatic parking depending on a determination result, and the automatic parking controller sets the guiding route requiring a large amount of steering of the vehicle in a case where the determination result indicates a curb, compared with a case where the determination result indicates a wall in the automatic parking in the form of parallel parking.Type: ApplicationFiled: September 9, 2016Publication date: July 18, 2019Applicant: Mitsubishi Electric CorporationInventors: Satoru INOUE, Shinichi HARASE, Ryotaro SUZUKI, Wataru TSUJITA, Tsutomu ASAHINA, Yoshitsugu SAWA
-
Publication number: 20190204120Abstract: An encoder includes a layered structure including a metal plate, a dielectric layer arranged on the metal plate, and a plurality of metallic components arranged on the dielectric layer to form a pattern of resonant circuits. The encoder includes an emitter to emit a waveform of a resonant frequency to the layered structure and a receiver to measure amplitudes of the waveform reflected from the layered structure. The processor operatively connected to a memory storing data relating positions of the emitter with amplitudes of the reflected waveform determines a position of the emitter from the measurements of the amplitudes based on the data. The encoder includes an output interface to render the position of the emitter.Type: ApplicationFiled: March 5, 2018Publication date: July 4, 2019Inventors: Bingnan Wang, Wataru Tsujita, Kota Sadamoto, Yoshitsugu Sawa
-
Publication number: 20190120662Abstract: An encoder including an emitter to emit a waveform to a scene including a structure. A receiver to receive the waveform reflected from the scene and to measure phases of the received waveform for a period of time. A memory to store a signal model relating phase measurements of the received waveform with phase parameters, and to store a state model relating the phase parameters with a state of the encoder. Wherein the signal model includes a motion-induced polynomial phase signal (PPS) component and a sinusoidal frequency modulated (FM) component. Wherein the PPS component is a polynomial function of the phase parameters, and wherein the FM component is a sinusoidal function of the phase parameters. A processor to determine the phase parameters using non-linear mapping of the phase measurements on the signal model and to determine the state of the encoder by submitting the phase parameters into the state model.Type: ApplicationFiled: January 18, 2018Publication date: April 25, 2019Inventors: Pu Wang, Philip Orlik, Kota Sadamoto, Wataru Tsujita
-
Publication number: 20190047600Abstract: The rail fracture detection device detects a rail fracture in a section provided with the track circuit by determining presence or absence of a rail fracture and determining presence or absence of a train on a rail by using information on whether a relay of the track circuit is activated or deactivated and information on a current value of current flowing in the track circuit.Type: ApplicationFiled: January 13, 2017Publication date: February 14, 2019Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Masashi ASUKA, Tomoaki TAKEWA, Wataru TSUJITA, Yoshitsugu SAWA, Daisuke KOSHINO
-
Publication number: 20190031219Abstract: A moving path memory stores a moving path of a train in advance. A signal receiver receives satellite positioning signals. A position calculator calculates measured positions and receiver clock errors, based on the satellite positioning signals and the moving path. A error area calculator sets vector pairs, each consisting of arbitrary two vectors perpendicular to each other on a plane spanned by a tangent vector and a radial vector of a tangent circle of the moving path at the measured positions, and calculates an error area for each vector pair, based on the measured positions, the receiver clock errors, and positions of positioning satellites. A position range extractor extracts a part of the moving path included in each error area, as a candidate position range corresponding to the error area. A position range restrictor determines a common area of the candidate position ranges, as a position range of the train.Type: ApplicationFiled: January 17, 2017Publication date: January 31, 2019Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Tomoaki TAKEWA, Wataru TSUJITA, Masahiro SHIKAI, Tadashi YAMAMOTO, Masashi ASUKA, Seiya NAGASHIMA, Yoshitsugu SAWA
-
Publication number: 20190016248Abstract: An optical axis control apparatus is provided with a relative-road-surface-angle calculating unit which calculates a relative horizontal plane angle being an inclination angle of a vehicle with respect to a horizontal plane by using an output value of an acceleration sensor provided on the vehicle and calculates a relative road surface angle being an inclination angle of the vehicle with respect to a road surface by integrating an amount of change of the relative horizontal plane angle while the vehicle is stationary, a relative-road-surface-angle correcting unit which obtains braking information indicating an operation state of a brake device provided on the vehicle and corrects the relative road surface angle for a change in the braking information, and an optical axis control unit which controls an optical axis of headlights provided on the vehicle using the relative road surface angle corrected by the relative-road-surface-angle correcting unit.Type: ApplicationFiled: March 30, 2016Publication date: January 17, 2019Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Mitsuaki OKADA, Takashi OSAWA, Wataru TSUJITA
-
Publication number: 20190011506Abstract: A first classification circuit obtains first measured values from each of devices, the first measured values of the device including at least one input value to the device and at least one output value from the device, and classifies the first measured values of the devices into normal first measured values and outlier first measured values using the OCSVM (One Class nu-Support Vector Machine). A second classification circuit obtains second measured values from each of devices, the second measured values of the device including at least one input value to the device, and classifies the second measured values of the devices into normal second measured values and outlier second measured values using the OCSVM. A determination circuit determines a device having the outlier first measured values and the normal second measured values, to be a malfunctioning device.Type: ApplicationFiled: December 1, 2016Publication date: January 10, 2019Applicant: Mitsubishi Electric CorporationInventors: Shoichi KOBAYASHI, Wataru TSUJITA, Toshihiro WADA, Tomoki TAKEGAMI
-
Publication number: 20180273063Abstract: A train-position detection device (1) includes: a radio-wave's angle-of-arrival calculator (14) configured to calculate an angle of arrival of a radio wave on the basis of a reception signal received by an array antenna (11) and a receiver (12); a position acquisition unit (13) for a ground-based wireless communication apparatus, configured to acquire information on an installation position of a ground-based wireless communication apparatus (30) from the reception signal; a train-position calculator (15) configured to calculate a train position on the basis of a movement distance of a train (40); a correction-amount-to-train-position calculator (16b) configured to calculate a train-position correction amount, by using the radio wave's angle of arrival calculated by the radio-wave's angle-of-arrival calculator (14), the installation position of the ground-based wireless communication apparatus (30) acquired by the position acquisition unit (13) for a ground-based wireless communication apparatus, and the trainType: ApplicationFiled: October 20, 2015Publication date: September 27, 2018Applicant: Mitsubishi Electric CorporationInventors: Wataru TSUJITA, Seiya NAGASHIMA, Tadashi YAMAMOTO, Kazuhiro TAHARA, Kenji KATAOKA
-
Publication number: 20180257540Abstract: A headlight optical axis control apparatus calculates an inclination angle of a vehicle with respect to a road surface from a ratio of a difference between acceleration signals in the front-and-rear direction measured at two time points (kn, kn+1) to a difference between acceleration signals in the up-and-down direction measured at the two time points (kn, kn+1), the two time points being in the vicinity of a time when the attitude of a vehicle body becomes equivalent to a stationary state, in a period from a time when the travelling vehicle stops to a time when the vehicle body comes to a halt.Type: ApplicationFiled: March 12, 2015Publication date: September 13, 2018Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takashi OHSAWA, Wataru TSUJITA
-
Publication number: 20180203127Abstract: A test signal generator generates a first test signal. A test signal transmitter transmits the first test signal. An RF receiver unit receives the first test signal and a first satellite signal through a receiving antenna, and generates a second test signal and a second satellite signal, respectively. Each of first and second demodulators calculates a correlation value between the second satellite signal and the spreading code to acquire a satellite. A first failure detector unit compares a signal intensity of the second test signal with a threshold to generate a first failure detection signal. A second failure detector compares the satellites acquired by the first and second demodulator to generate a second failure detection signal. A state determiner determines whether and where a failure exists, using the first and second failure detection signals.Type: ApplicationFiled: May 10, 2016Publication date: July 19, 2018Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Tomoaki TAKEWA, Wataru TSUJITA, Yoshitsugu SAWA, Kenji KATAOKA, Tadashi YAMAMOTO, Seiya NAGASHIMA
-
Patent number: 10023211Abstract: A train position detecting device includes: a GPS position guarantee range calculation part for calculating, based on a result of measurement of a position of a train by GPS signals; a tachogenerator-position guarantee range calculation part for calculating, based on a result of measurement of a position of the train by a tachometer generator that measures a relative distance from a measurement carried out previously; and a position determination part that determines, between an end part of the GPS position guarantee range in the first-direction and an end part of the tachogenerator-position guarantee range in the first-direction, a position of an end part on the positive side of the second direction to be a position of the end part of the train in the first-direction.Type: GrantFiled: January 21, 2016Date of Patent: July 17, 2018Assignee: Mitsubishi Electric CorporationInventors: Takaya Katsuragi, Koki Yoshimoto, Wataru Tsujita, Tomoaki Takewa
-
Publication number: 20180180731Abstract: A parking mode determining system includes a distance measurer to measure a distance to an obstacle on the side of a host vehicle; a host-vehicle position measurer to measure a position of the host vehicle; a reflected position calculator to calculate a reflected position of the transmission wave; a grouping unit to group a plurality of the reflected positions for each obstacle; an angle calculator to obtain an approximate line for each of two or more of the reflected positions adjacent to each other, and calculate an angle of inclination of the approximate line or an angle of inclination of a normal line of the approximate line; and a parking mode determiner to determine whether a parking mode is parallel parking, perpendicular parking, or angle parking on the basis of a distribution of a plurality of the angles of inclination.Type: ApplicationFiled: October 6, 2015Publication date: June 28, 2018Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Satoru INOUE, Ryotaro SUZUKI, Wataru TSUJITA, Yoshitsugu SAWA
-
Publication number: 20180162686Abstract: Systems and methods for an elevator. The elevator includes an elevator car to move along a first direction. A transmitter for transmitting a signal having a waveform. A receiver for receiving the waveform. A processor having memory is configured to represent the received waveform as a hybrid sinusoidal frequency modulated (FM)-polynomial phase signal (PPS) model. The hybrid sinusoidal FM-PPS model having PPS phase parameters representing a speed of the elevator car along a first direction and a sinusoidal FM phase parameter representing a vibration of the elevator car along a second direction. The processor solves the hybrid sinusoidal FM-PPS model to produce the speed of the elevator car or the vibration of the elevator car or both. A controller controls an operation of the elevator using the speed of the elevator car or the vibration of the elevator car, or both, to assist in an operational management of the elevator.Type: ApplicationFiled: February 27, 2017Publication date: June 14, 2018Applicants: Mitsubishi Electric Research Laboratories, Inc., Mitsubishi Electric CorporationInventors: Pu Wang, Philip Orlik, Kota Sadamoto, Wataru Tsujita
-
Publication number: 20180065539Abstract: A control unit of an optical axis control device for a headlight calculates a first vehicle angle (??) and a second vehicle angle (??) at different timings in traveling of a vehicle, and calculates a third vehicle angle (?s) at which a difference between acceleration signals in a front-rear direction (?X) is zero. The control unit calculates a representative value (?S) based on a distribution of a plurality of third vehicle angles (?s), and generates a signal for operating an optical axis of the headlight based on the representative value (?S).Type: ApplicationFiled: May 27, 2015Publication date: March 8, 2018Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takashi OHSAWA, Wataru TSUJITA
-
Publication number: 20180009454Abstract: A train position detecting device includes: a GPS position guarantee range calculation part for calculating, based on a result of measurement of a position of a train by GPS signals; a tachogenerator-position guarantee range calculation part for calculating, based on a result of measurement of a position of the train by a tachometer generator that measures a relative distance from a measurement carried out previously; and a position determination part that determines, between an end part of the GPS position guarantee range in the first-direction and an end part of the tachogenerator-position guarantee range in the first-direction, a position of an end part on the positive side of the second direction to be a position of the end part of the train in the first-direction.Type: ApplicationFiled: January 21, 2016Publication date: January 11, 2018Applicant: Mitsubishi Electric CorporationInventors: Takaya KATSURAGI, Koki YOSHIMOTO, Wataru TSUJITA, Tomoaki TAKEWA
-
Publication number: 20170129390Abstract: In a headlight optical-axis control device 10, a controller 15 is configured to: calculate vehicle angles indicating tilt angles of a vehicle relative to a road surface, on the basis of ratios, each being a ratio of a difference between a reference acceleration in a longitudinal direction and a signal indicating an acceleration in the longitudinal direction detected during traveling of the vehicle, to a difference between a reference acceleration in a perpendicular direction and a signal indicating an acceleration in the perpendicular direction detected during traveling of the vehicle by an acceleration sensor 2; calculate a plot of the calculated vehicle angles thereby to derive a vehicle angle corresponding to a case where a change of the acceleration in the longitudinal direction is zero; and generate a signal for controlling the optical axes of headlights 5L and 5R on the basis of the derived vehicle angle.Type: ApplicationFiled: September 16, 2014Publication date: May 11, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Mitsuaki AKAZA, Toshiyuki YAMASHITA, Takashi OHSAWA, Wataru TSUJITA, Takahiko ITO
-
Patent number: 9500747Abstract: A travel distance measurement device includes a transmitting antenna that is disposed in a vehicle and emits a transmission signal, as a radio wave, toward a ground surface, a receiving antenna that is disposed in the vicinity of the transmitting antenna, and receives a radio wave reflected from the ground surface and acquires a reflection signal, and a distance calculator (an IQ demodulator and a phase conversion integrator) that calculates the travel distance of the vehicle on the basis of the phase of the acquired reflection signal.Type: GrantFiled: December 3, 2012Date of Patent: November 22, 2016Assignee: Mitsubishi Electric CorporationInventors: Kenji Inomata, Wataru Tsujita, Kazuhiro Tahara, Seiya Nagashima
-
Publication number: 20160325766Abstract: Based on a ratio between Doppler frequencies calculated from a plurality of reception signals outputted by a receiver, a position detector calculates a relative position of a plurality of antennas in a mobile wireless apparatus to a stationary wireless apparatus. A train position detector calculates a position of a train from the calculated relative position, a placement position of the stationary wireless apparatus and placement positions in the train of the plurality of antennas.Type: ApplicationFiled: October 6, 2014Publication date: November 10, 2016Applicant: Mitsubishi Electric CorporationInventors: Wataru TSUJITA, Kenji INOMATA, Seiya NAGASHIMA, Kazuhiro TAHARA
-
Patent number: 9488500Abstract: A reflector apparatus includes reflectors, which respectively radiate reflected waves in predetermined polarization directions. A polarized wave information reading circuit fixed to a moving body radiates a radio wave toward the reflecting apparatus from a transmitting antenna, receives reflected waves from the reflecting apparatus, and generates a received level difference signal that corresponds to a polarization direction of the received reflected waves. A position calculating circuit calculates a position of the polarized wave information reading circuit based on the received level difference signal.Type: GrantFiled: April 18, 2011Date of Patent: November 8, 2016Assignee: Mitsubishi Electric CorporationInventors: Wataru Tsujita, Kenji Inomata, Masahiro Watanabe, Masahiro Shikai