Patents by Inventor Mitsuo Sasaki

Mitsuo Sasaki 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: 20170274929
    Abstract: A power steering apparatus and a control circuit for a power steering apparatus are provided. The power steering apparatus detects an abnormality in the power steering apparatus based on whether there is a periodic change within a predetermined frequency range with respect to the number of rotations of an electric motor, a steering velocity, or a steering torque.
    Type: Application
    Filed: August 31, 2015
    Publication date: September 28, 2017
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mitsuo SASAKI, Makoto GOTO
  • Publication number: 20170259378
    Abstract: Ejection and stop of a powder flow are switched while maintaining a once generated steady flow without stopping it. A processing nozzle includes a supply source of a fluid containing a powder, a first channel through which the fluid supplied from the supply source passes, a second channel that supplies the fluid to an ejection port of the nozzle, a third channel that releases the fluid outside the nozzle, and a switch that causes the first channel and the second channel to communicate with each other when supplying the fluid to the ejection port, and causes the first channel and the third channel to communicate with each other when not supplying the fluid to the ejection port.
    Type: Application
    Filed: November 11, 2015
    Publication date: September 14, 2017
    Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Hiroshi OHNO, Mitsuo SASAKI, Yuji SASAKI, Satoshi TSUNO, Go OBARA, Tomohiko YAMADA, Yasutomo SHIOMI, Takashi OBARA
  • Publication number: 20170240168
    Abstract: One aspect of the present invention increases or reduces an amplitude or amplitudes of a steering angle sensor output signal and/or a motor rotational angle signal, and outputs a motor instruction signal based on a substitute signal for a torque sensor output signal that is calculated based on at least one of the steering angle sensor output signal and the motor rotational angle signal that is subjected to the adjustment of the amplitude thereof, and the other of the steering angle sensor output signal and the motor rotational angle signal, when an abnormality is detected in the torque sensor output signal.
    Type: Application
    Filed: August 6, 2015
    Publication date: August 24, 2017
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mitsuo SASAKI, Takumi HISAZUMI
  • Patent number: 9707994
    Abstract: A power steering apparatus includes: a steering load average value calculating circuit 39 which calculates a steering torque average value Trav which is the average value of steering torque Tr within a predetermined interval of time; and an abnormality detection circuit 40 which compares steering torque average value Trav with a specified steering torque value Trrf and detects the abnormality of the apparatus when steering torque average value Trav is larger than the specified value.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: July 18, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS STEERING, LTD.
    Inventor: Mitsuo Sasaki
  • Publication number: 20170186143
    Abstract: This specification discloses an optical processing head including a light guide portion that guides, to a process surface, a ray for processing. The light guide portion is further configured to guide, to the process surface, a ray for inspection different in wavelength from the ray for processing. The optical processing head further includes an inspection portion that inspects the state of the process surface based on reflected light of the ray for inspection reflected by the process surface. With the optical processing head, the state of the process surface can be easily inspected even during optical processing.
    Type: Application
    Filed: March 20, 2015
    Publication date: June 29, 2017
    Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Hiroshi OHNO, Takashi OBARA, Yuji SAKAKI, Mitsuo SASAKI, Kazuyuki MASUKAWA
  • Patent number: 9643600
    Abstract: To provide a vehicle control system capable of promptly achieving a travel motion along a travel path. A yaw moment control amount is imparted according to a traveling-direction virtual line extending from an ego vehicle in a traveling direction and a formed angle between the traveling-direction virtual line and a travel-path defining line.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: May 9, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akira Takahashi, Jun Kubo, Mitsuo Sasaki
  • Publication number: 20170087666
    Abstract: This specification discloses a processing nozzle for efficiently performing supply of a powder serving as a material used for processing using an energy line. The processing nozzle includes a powder ejector that ejects a powder serving as a processing material toward a molten pool formed on a process surface by an energy line. The processing nozzle further includes an adjuster that adjusts, in accordance with the shape of the molten pool, the shape and/or position of a powder spot formed by the powder ejector.
    Type: Application
    Filed: March 20, 2015
    Publication date: March 30, 2017
    Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Mitsuo SASAKI, Hiroshi OHNO
  • Publication number: 20170050198
    Abstract: An optical processing nozzle that homogeneously supplies a fluid to a processing surface in optical processing is provided. The optical processing nozzle includes a beam path that is arranged so that a beam can pass through the beam path toward a processing surface in order to perform processing using a beam guided from a light source, and a channel structure that is arranged around the beam path and is configured to eject a fluid toward the processing surface. The channel structure includes an inflow port through which the fluid flows, at least two passage holes through which the fluid flowing from the inflow port passes, a channel that guides the fluid from the inflow port to the passage holes, and an ejection port from which the fluid having passed through the at least two passage holes is ejected toward the processing surface.
    Type: Application
    Filed: February 25, 2015
    Publication date: February 23, 2017
    Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Hiroshi OHNO, Yujio SASAKI, Mitsuo SASAKI, Takashi OBARA, Kazuyuki MASUKAWA
  • Publication number: 20170045462
    Abstract: An optical processing head that detects a trouble of an optical processing head that will be generated at the time of optical processing before the trouble occurs is disclosed. The optical processing head that performs processing by condensing, on a process surface, a ray emitted by a light source for processing includes a cylindrical housing that surrounds a ray for processing emitted by the light source for processing, a ray emitter for inspection that is incorporated in the cylindrical housing and arranged outside the path of the ray for processing, and a light receiver that is incorporated in the cylindrical housing, arranged outside the path of the ray for processing, and receives a ray for inspection emitted by the ray emitter for inspection. The contamination of the inner surface of the cylindrical housing or the concentration of a scattering object flowing into the cylindrical housing is inspected by using a signal acquired from the light receiver.
    Type: Application
    Filed: March 10, 2015
    Publication date: February 16, 2017
    Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Hiroshi OHNO, Yuji SASAKI, Mitsuo SASAKI, Takashi OBARA, Kazuyuki MASUKAWA
  • Publication number: 20170015348
    Abstract: Disclosed is a power steering device having at least two redundant steering torque sensor units TS1 and TS2, at least two redundant steering angel sensor units AS1 and AS2, at least two redundant motor position sensor units 61 and 62 and a control unit configured to: in a normal state, perform steering assist control based on a steering torque detection signal of one of the steering torque sensor units TS1 and TS2, a steering angle detection signal of one of the steering angle sensor units AS1 and AS2 and a motor position detection signal of one of the motor position sensor units 61 and 62; perform redundant monitoring on the steering torque sensor units TS1 and TS2, the steering angel sensor units AS1 and AS2 and the motor position sensor units 61 and 62; and, upon detection of an abnormality in any sensor output signal by the redundant monitoring, switch the abnormal signal to an alternative signal.
    Type: Application
    Filed: January 14, 2015
    Publication date: January 19, 2017
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mitsuo SASAKI, Takumi HISAZUMI
  • Publication number: 20160375521
    Abstract: A machining apparatus that need not exchange a processing nozzle when changing a shaping condition, and increases the use efficiency of a material is disclosed. The processing nozzle that performs processing by ejecting a processing material toward a molten pool formed on a process surface by an energy line includes a cylindrical inner housing that incorporates a path through which the energy line passes, and ejects the energy line from one end, a cylindrical outer housing that incorporates the inner housing, and has an inner surface tapered in the ejection direction of the energy line ejected from the inner housing, and a slide mechanism that changes, along the energy line, the relative position of the outer housing with respect to the inner housing.
    Type: Application
    Filed: March 4, 2015
    Publication date: December 29, 2016
    Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Yuji SASAKI, Hiroshi OHNO, Mitsuo SASAKI, Takashi OBARA, Kazuyuki MASUKAWA
  • Publication number: 20160368097
    Abstract: An optical processing head capable of downsizing an apparatus while increasing the shaping accuracy of optical processing is disclosed. The optical processing head performs processing while moving, in a predetermined moving direction on a processing surface, an optical spot formed by condensing light emitted by a light source. The optical processing head includes an optical element that condenses light emitted by the light source to generate the optical spot of a shape elongated in the moving direction of the optical spot. Part of the optical spot is set as a processing region, the front side and/or rear side of the processing region in the moving direction is set as a pre-heating region and/or post-heating region, and a processing target object before and/or after processing in the region is heated.
    Type: Application
    Filed: February 25, 2015
    Publication date: December 22, 2016
    Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Hiroshi OHNO, Yuji SASAKI, Mitsuo SASAKI, Takashi OBARA, Kazuyuki MASUKAWA
  • Publication number: 20160368087
    Abstract: An optical processing head capable of reducing the energy loss at the time of optical processing is disclosed. The optical processing head includes a first optical element that converts light emitted by a light source into first parallel light, a second optical element that is arranged downstream of the first optical element and converts the first parallel light into first divergent light, a third optical element that is arranged downstream of the second optical element and converts the first divergent light into second parallel light, and a fourth optical element that is arranged downstream of the third optical element and converts the second parallel light into convergent light which is condensed on the processing surface side.
    Type: Application
    Filed: February 20, 2015
    Publication date: December 22, 2016
    Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Hiroshi OHNO, Tetsuo SAKAI, Mitsuo SASAKI, Kazuyuki Masukawa, Takashi OBARA, Yuji SASAKI, Satoshi TSUNO
  • Publication number: 20160332660
    Abstract: An in-vehicle device controller has at least two redundant operating condition detection units. Under normal circumstances, the controller performs actuator drive control based on an operating condition detection signal of one of the operating condition detection units. Upon detection of an abnormality in the signal transmission state, data state or operating status of one of the at least two operating condition detection units, the controller performs actuator drive control based on an operating condition detection signal of another one of the at least two operating condition detection units in which no abnormality is present. By this control, the actuator function is preserved even in the event of the abnormality in the operating condition detection unit or operating condition detection signal.
    Type: Application
    Filed: February 5, 2015
    Publication date: November 17, 2016
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mitsuo SASAKI, Takumi HISAZUMI
  • Publication number: 20160229445
    Abstract: In a power steering device and a control device for a vehicle-mounted instrument, an abnormality detection accuracy of sensor output signals is increased. In an electric power steering device and a control device for a vehicle-mounted instrument, judgment for the abnormality of the sensor output signals is carried out by using at least four or more sensor output signals, in which when the sensor output signals satisfy both a first condition (viz., the number of the output signals showing an identical value is the largest) and a second condition (viz., the number is equal to or larger than “n+1”) (n=the largest number of the sensor output signals that have a common factor), judgement is so made that the sensor output signals that satisfy the first and second conditions are normal and the other signals are abnormal.
    Type: Application
    Filed: July 30, 2014
    Publication date: August 11, 2016
    Applicant: Hitachi Automotive Systems Steering, Ltd.
    Inventors: Mitsuo SASAKI, Takumi HISAZUMI
  • Publication number: 20160200353
    Abstract: In a power steering device and a vehicle-mounted instrument, an abnormality detection accuracy of a state quantity detection means is increased. In an electric power steering device and a vehicle-mounted instrument that are each provided with a plurality of state quantity detection means, an abnormality detection for the state quantity detection means is carried out by comparing detection signals issued from the state quantity detection means provided on a redundant system, and by comparing the detection signals issued from the state quantity detection means with signals that are issued from other state quantity detecting means and calculated to be matched with the same unit as the compared detection signals, a value or close value that is possessed by the largest number of signals is set as a normal value.
    Type: Application
    Filed: July 30, 2014
    Publication date: July 14, 2016
    Applicant: HITACHI AUTOMOTIVE SYSTEMS STEERING, LTD.
    Inventors: Mitsuo SASAKI, Takumi HISAZUMI
  • Publication number: 20160152237
    Abstract: There is provided a vehicle control system capable of ensuring stability even if an ego vehicle runs off a travel path. According to the invention, when yaw moment control is carried out to reduce a formed angle between a travel-path defining line of the travel path, which is recognized from information about an area located in a traveling direction of the ego vehicle, and a traveling-direction virtual line extending from the ego vehicle in the traveling direction, if it is judged that the ego vehicle has departed from the travel-path defining line, the yaw moment control is suspended.
    Type: Application
    Filed: June 3, 2014
    Publication date: June 2, 2016
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akira TAKAHASHI, Jun KUBO, Mitsuo SASAKI
  • Publication number: 20160152232
    Abstract: There is provided a vehicle control system capable of ensuring stability even if a vehicle spins slowly. The invention recognizes a travel-path defining line of a travel path from information about an area located in the traveling direction of an ego vehicle, recognizes a traveling-direction virtual line extending from the ego vehicle in the traveling direction, and controls vehicle motion to reduce a formed angle between the traveling-direction virtual line and the travel-path defining line at least when the formed angle increases.
    Type: Application
    Filed: June 3, 2014
    Publication date: June 2, 2016
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akira TAKAHASHI, Jun KUBO, Mitsuo SASAKI
  • Publication number: 20160144896
    Abstract: Provided is a vehicle control system capable of securing stability even in the event of a collision with a travel-path defining line such as a guardrail. The invention recognizes the travel-path defining line of a travel path from information about an area in a traveling direction of an ego vehicle, recognizes a traveling-direction virtual line extending from the ego vehicle in the traveling direction, and imparts a yaw moment control amount so that a formed angle between the traveling-direction virtual line and the travel-path defining line decreases after the ego vehicle collides with the travel-path defining line.
    Type: Application
    Filed: May 27, 2014
    Publication date: May 26, 2016
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akira TAKAHASHI, Jun KUBO, Mitsuo SASAKI
  • Publication number: 20160107640
    Abstract: To provide a vehicle control system capable of promptly achieving a travel motion along a travel path. A yaw moment control amount is imparted according to a traveling-direction virtual line extending from an ego vehicle in a traveling direction and a formed angle between the traveling-direction virtual line and a travel-path defining line.
    Type: Application
    Filed: May 27, 2014
    Publication date: April 21, 2016
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Akira TAKAHASHI, Jun KUBO, Mitsuo SASAKI