Patents by Inventor Kaoru Kumagai

Kaoru Kumagai 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: 11029154
    Abstract: A deflecting device and surveying instrument comprising a holding member having a ring shape; ring gears disposed on both sides of the holding member with the holding member interposed the ring gears, the ring gears being concentric with the holding member; bearings disposed between the holding member and the ring gears on both sides of the holding member, the bearings being concentric with the holding member; optical deflecting members disposed at central portions of the ring gears and integrated with the ring gears; deflection motors corresponding to the respective ring gears; and a drive transmitting member configured to transmit rotary force of the deflection motors to the ring gears.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: June 8, 2021
    Assignee: TOPCON CORPORATION
    Inventors: Hideyuki Matsumoto, Fumio Ohtomo, Kaoru Kumagai
  • Publication number: 20210116241
    Abstract: An inner frame is rotatably supported by the outer frame through a first shaft, a tilt detecting unit has a tilt sensor and is rotatably supported by the inner frame through a second shaft orthogonal to the first shaft, a first encoder is provided on the first shaft, a second encoder is provided on the second shaft, the tilt detecting device includes the motors provided on the respective shafts so that the respective shafts are rotated, and an arithmetic processing module which drives and controls the respective motors, in which the arithmetic processing module is configured to drive the respective motors so that the tilt sensor detects the horizontality based on a signal issued by the tilt sensor and to calculate a tilt of the outer frame based on the outputs from the first and second encoders when the tilt sensor detected the horizontality, and the arithmetic processing module is configured to reverse the tilt detecting unit 180° at least once based on the outputs from the respective encoders in relation to
    Type: Application
    Filed: October 15, 2020
    Publication date: April 22, 2021
    Inventors: Fumio Ohtomo, Nobuyuki Nishita, Kaoru Kumagai
  • Patent number: 10983196
    Abstract: A laser scanner comprising a distance measuring light projecting unit for emitting at least two distance measuring lights at a known deflection angle with respect to a projecting optical axis, a distance measuring unit for receiving at least two reflected distance measuring lights and performing a distance measurement, respectively, an optical axis deflector for deflecting optical axes of the distance measuring lights and the reflected distance measuring lights at the same deflection angle in the same direction, a projecting direction detecting module for deflecting a deflection angle and a deflecting direction by the optical axis deflector, and an arithmetic control module, wherein the arithmetic control module performs a two-dimensional scanning with the distance measuring lights, draws at least two loci on a plane to be measured, and measures the plane to be measured along at least the two loci substantially at the same time by the distance measuring unit.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: April 20, 2021
    Assignee: TOPCON Corporation
    Inventors: Fumio Ohtomo, Kaoru Kumagai
  • Patent number: 10982957
    Abstract: A surveying system comprising a rover having an illuminating lamp for emitting an illumination light, a second azimuth indicator for detecting an azimuth angle of an optical axis of the illumination light, a surveying instrument comprises a surveying instrument main body and a rotary driving unit capable of rotating the surveying instrument main body in at least a left-and-right direction, wherein the surveying instrument main body comprises a first azimuth indicator for detecting an azimuth angle of a reference optical axis, and as arithmetic control module, and wherein the arithmetic control module is configured to calculate the azimuth angle of the reference optical axis which is in parallel or approximately parallel with the optical axis of the illumination light based on the azimuth angle of the optical axis of the illumination light received from the rover and the azimuth angle of the reference optical axis.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: April 20, 2021
    Assignee: TOPCON Corporation
    Inventors: Fumio Ohtomo, Kaoru Kumagai, Satoshi Yanobe
  • Publication number: 20210088333
    Abstract: A surveying instrument including an optical axis deflector which integrally deflects a distance measuring optical axis and a light receiving optical axis, a narrow-angle image pickup module having an optical axis a part of which is common to the distance measuring optical axis, a distance measurement calculation module and an arithmetic control module, in which the wavelength dispersion compensation prisms which is constituted of a plurality of optical members having the different wavelength characteristics are provided in the part of which is common to the distance measuring optical axis and the narrow-angle image pickup optical axis, the arithmetic control module performs the distance measurement of a measuring point based on a signal of the distance measuring light and a signal of the reflected distance measuring light, and acquires a narrow-angle image in which the dispersion has been compensated by the wavelength dispersion compensation prisms.
    Type: Application
    Filed: September 11, 2020
    Publication date: March 25, 2021
    Inventors: Ikuo Ishinabe, Fumio Ohtomo, Kaoru Kumagai
  • Patent number: 10921430
    Abstract: A target instrument has an illuminating lamp, wherein a total station has an optical axis deflector capable of deflecting a distance measuring optical axis, a projecting direction detecting module for performing an angle measurement of the distance measuring optical axis, an image pickup unit, and an arithmetic control module for controlling a deflecting action of the optical axis deflector and a distance measuring action of a distance measuring unit, wherein the arithmetic control module is configured to detect an illumination light from an image acquired by the image pickup unit, to acquire a direction of the illuminating lamp based on a detection result, to make the optical axis deflector to scan with a distance measuring light around the acquired direction and to perform a distance measurement and an angle measurement along a scanning path.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: February 16, 2021
    Assignee: TOPCON Corporation
    Inventors: Fumio Ohtomo, Kaoru Kumagai, Tetsuji Anai
  • Patent number: 10895632
    Abstract: A target instrument has an object to be measured which is provided with a reflection sheet, wherein the total station has a distance measuring light projecting unit, a light receiving unit, a distance measuring unit for performing a distance measurement of an object to be measured, an optical axis deflector capable of deflecting the distance measuring optical axis two-dimensionally, a projecting direction detecting module for detecting a deflection angle of the distance measuring optical axis and performing an angle measurement, and an arithmetic control module for controlling the optical axis deflector and the distance measuring unit, wherein the arithmetic control module is configured to two-dimensionally scan the object to be measured with the distance measuring light and to perform a distance measurement and an angle measurement with respect to the object to be measured, and further to detect a tilt and a tilt direction of the target instrument.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: January 19, 2021
    Assignee: TOPCON Corporation
    Inventors: Fumio Ohtomo, Kaoru Kumagai, Nobuyuki Nishita
  • Publication number: 20200386547
    Abstract: A surveying instrument include a surveying instrument including a surveying instrument main body, a measuring direction image pickup module for acquiring a first image, a distance measuring unit for measuring a distance to the object, a projecting direction detecting module for detecting a projecting direction of the distance measuring light, a time detector for generating a signal of a reference time, a downward image pickup module for acquiring a second image, an attitude detector for detecting a tilt of the surveying instrument main body and an arithmetic control module, wherein the arithmetic control module is configured to detect a change between the first images or the second images, determine a measuring point of the object with respect to the vertical lower image based on the change between the images and the detection results of the distance measuring unit and the projecting direction detecting module and the reference time.
    Type: Application
    Filed: June 9, 2020
    Publication date: December 10, 2020
    Inventors: Fumio Ohtomo, Tetsuji Anai, Kaoru Kumagai
  • Publication number: 20200386546
    Abstract: A surveying instrument include a monopod installed on a reference point and a surveying instrument main body provided on the monopod, wherein the surveying instrument main body includes a measuring direction image pickup module which acquires first image including an object, a distance measuring unit which measures a distance to the object, a measuring direction detecting module which detects a measuring direction, a time detector which generates a reference time signal and an arithmetic control module, the arithmetic control module associates a distance measurement result with the reference time signal, associates a measuring direction with the reference time signal, and associates the first image with the reference time signal, associates an image change, the measuring direction, and a distance measurement result with each other based on the reference time signal, calculates a measuring direction in the distance measurement and determines a position of a measurement part of the object.
    Type: Application
    Filed: June 9, 2020
    Publication date: December 10, 2020
    Inventors: Fumio Ohtomo, Tetsuji Anai, Kaoru Kumagai
  • Patent number: 10823558
    Abstract: The invention provides a surveying instrument, which comprises a protractor table installed via an installation base and capable of detecting a lateral rotation angle and a surveying instrument main unit mounted on the protractor table via supporting mechanisms capable of rotating longitudinally, wherein the supporting mechanisms enables the surveying instrument main unit to set in a predetermined angle condition with respect to the protractor table, wherein the surveying instrument main unit comprises a distance measuring unit which has a light emitting element for emitting a distance measuring light, a distance measuring light projecting unit for projecting the distance measuring light, a light receiving unit for receiving a reflected distance measuring light and a photodetector for receiving the reflected distance measuring light and for producing a light receiving signal, and the distance measuring unit performs a distance measurement of an object to be measured based on the light receiving signal from th
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: November 3, 2020
    Assignee: TOPCON Corporation
    Inventors: Fumio Ohtomo, Kaoru Kumagai
  • Patent number: 10823823
    Abstract: A surveying instrument comprises a distance measuring unit which includes a light emitting element, a distance measuring light projecting unit, a light receiving unit and a photodetector for producing a light receiving signal, and which performs a distance measurement of an object to be measured based on the light receiving signal, an optical axis deflecting unit for deflecting the distance measuring optical axis, a projecting direction detecting unit for detecting a deflection angle of the distance measuring optical axis and an arithmetic control component, wherein the optical axis deflecting unit comprises a pair of optical prisms capable of rotating and motors which individually and independently rotate the optical prisms, and wherein the arithmetic control component is configured to control the optical axis deflecting unit, to perform a two-dimensional scanning of the distance measuring light, to perform a distance measurement of when the light receiving signal is detected, to measure a horizontal angle a
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: November 3, 2020
    Assignee: TOPCON Corporation
    Inventors: Fumio Ohtomo, Kaoru Kumagai
  • Publication number: 20200340811
    Abstract: A technique for calculating charge in accordance with a state of use of a user in a rental business of total stations is provided. A total station includes a positioning unit, an operation receiving unit, a positioning mode selector, and a counter. The positioning unit performs positioning by using pulsed laser light. The operation receiving unit receives operation of a user. The positioning mode selector selects one of a first positioning mode and a second positioning mode on the basis of operation of the user to the operation receiving unit. In the first positioning mode, positioning is performed at a specific point at a relatively small laser wave number. In the second positioning mode, positioning is performed at a specific point at a relatively large laser wave number. The counter counts up each of the selected times of the first positioning mode and the second positioning mode.
    Type: Application
    Filed: April 20, 2020
    Publication date: October 29, 2020
    Applicant: Topcon Corporation
    Inventor: Kaoru KUMAGAI
  • Patent number: 10809360
    Abstract: A laser scanner comprises a scanner main unit, wherein the scanner main unit has a distance measuring light projecting component for projecting a distance measuring light, a light receiving component for receiving a reflected distance measuring light, a distance measuring component for performing a distance measurement based on a light receiving signal from the light receiving component, an optical axis deflecting unit for deflecting a distance measuring optical axis, a projecting direction detecting unit for detecting a deflection angle of the distance measuring optical axis, a storage component which stores three-dimensional design drawing data of an object to be measured and a control component for controlling the optical axis deflecting unit and the distance measuring component, wherein the control component acquires scanning data by scanning a measurement range and extracts an actual ridge line or an actual intersection point of the object to be measured based on the scanning data.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: October 20, 2020
    Assignee: TOPCON Corporation
    Inventors: Fumio Ohtomo, Kaoru Kumagai
  • Patent number: 10800344
    Abstract: An aerial photogrammetric device comprises an aerial vehicle configured to fly autonomously or remotely controlled, an image pickup device provided on the aerial vehicle and having an optical axis extending in a vertical direction, an attitude detecting device for detecting a tilt angle and a tilting direction with respect to a horizontality or a verticality of the optical axis, a position measuring device, and a control device for controlling a flight of the aerial vehicle, wherein the control device is configured to acquire images at two points by the image pickup device, acquire image acquiring positions at a time of image acquisition from the position measuring device, acquire a detection result of the attitude detecting device at the time of image acquisition, correct the images acquired at the two points into horizontal images based on the detection result, and perform a relative orientation of the obtained horizontal images.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: October 13, 2020
    Assignee: TOPCON Corporation
    Inventors: Fumio Ohtomo, Kaoru Kumagai
  • Publication number: 20200318963
    Abstract: There is provided a surveying instrument including a monopod which is installed on a reference point, a surveying instrument main body which is provided at a known distance from a lower end of the monopod and a known angle with respect to an axis of the monopod, two auxiliary legs which extend downward from an middle portion of the monopod at a predetermined angle, wherein the surveying instrument main body comprises a distance measuring unit configured to measure a distance to an object to be measured, a measuring direction image pickup module configured to acquire an observation image including the object to be measured, an attitude detector configured to detect the tilts of the surveying instrument main body with respect to the horizontality, and an arithmetic control module, and wherein the surveying instrument main body is supported by three points by the monopod and the auxiliary legs.
    Type: Application
    Filed: March 20, 2020
    Publication date: October 8, 2020
    Inventors: Satoshi Hirano, Kaoru Kumagai, Fumio Ohtomo, Kazuki Osaragi, Nobuyuki Nishita, Tetsuji Anai, Noriyasu Kiryuu
  • Publication number: 20200318966
    Abstract: There is provided a surveying instrument including a monopod which is installed on a reference point, a surveying instrument main body which is provided at a known distance from a lower end of the monopod and a known angle with respect to an axis of the monopod, two auxiliary legs which extend downward from an middle portion of the monopod at a predetermined angle, and a lower image pickup module which is provided at a known position with respect to the surveying instrument main body, wherein the surveying instrument main body comprises a measuring unit, a measuring direction image pickup module, and an arithmetic control module, wherein the surveying instrument main body is supported by three points by the monopod and the auxiliary legs, and a positional change or a rotational change of the surveying instrument main body is calculating based on a change of the lower image.
    Type: Application
    Filed: March 20, 2020
    Publication date: October 8, 2020
    Inventors: Satoshi Hirano, Kaoru Kumagai, Fumio Ohtomo, Kazuki Osaragi, Nobuyuki Nishita, Tetsuji Anai, Noriyasu Kiryuu
  • Patent number: 10767991
    Abstract: A laser scanner includes a distance measuring unit which has a light emitting element for emitting a distance measuring light, a distance measuring light projecting unit, a light receiving unit and a photodetector for producing a light receiving signal, and which performs a distance measurement based on the light receiving signal, an optical axis deflecting unit provided on a distance measuring optical axis and for deflecting the distance measuring optical axis, a projecting direction detecting unit for detecting a deflection angle of the distance measuring optical axis and a control component for controlling the optical axis deflecting unit and the distance measuring unit, wherein the optical axis deflecting unit comprises a pair of optical prisms capable of rotating and motors for rotating the optical prisms, and wherein the control component is configured to control the optical axis deflecting unit, scan the distance measuring light and acquire scanning data under scanning conditions corresponding to a mea
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: September 8, 2020
    Assignee: TOPCON Corporation
    Inventors: Fumio Ohtomo, Kaoru Kumagai
  • Publication number: 20200271758
    Abstract: Provided is a target instrument including a pole, a prism provided on the pole, and a terminal device provided on the pole, wherein the terminal device comprises an image pickup module, a tilt sensor which detects tilts in two axial directions, and an arithmetic control module, wherein the image pickup module acquires an image which includes a reference object, the tilt sensor detects a tilt angle of a target instrument, and the arithmetic control module calculates a tilt direction of the target instrument from a position of the reference object in the image, calculates a tilt direction of the target instrument based on tilt angles in the two axial directions of the tilt sensor, acquires a deviation between the two tilt directions, and corrects the tilt angles in the two axial directions of the tilt sensor to tilt angles in directions parallel to an optical axis of the image pickup module and orthogonal to the optical axis based on the deviation.
    Type: Application
    Filed: February 25, 2020
    Publication date: August 27, 2020
    Inventors: Kaoru Kumagai, Minoru Chiba, Akinobu Sugiura
  • Patent number: 10712153
    Abstract: Provided is a method for controlling an ultrasonic motor to reduce deterioration of automatic tracking performance, and a surveying instrument for the same. The present invention provides a method for controlling an ultrasonic motor in a surveying instrument including a rotary shaft, an ultrasonic motor that drives a rotary shaft, a tracking unit that includes a light emitting unit and a light receiving unit and tracks a target, and a clock signal oscillation unit that outputs a clock signal, wherein at the time of low-speed rotation of the ultrasonic motor, based on the clock signal, a ratio of an acceleration period in which a drive signal is applied and a deceleration period in which the drive signal is stopped in a drive cycle of the drive signal of the ultrasonic motor is set, and the light emitting unit is made to emit light in the deceleration period.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: July 14, 2020
    Assignee: TOPCON CORPORATION
    Inventors: Kaoru Kumagai, Satoshi Yanobe, Tetsutaro Kouji
  • Patent number: 10697758
    Abstract: A laser remote length measurement instrument capable of remotely measuring a length between two required points in a non-contact manner is provided. The laser remote length measurement instrument includes a rangefinding unit, an optical axis deflection section, a rotation angle detector, and a computation controller. The rangefinding unit is configured to cause a light emitting element to emit visible rangefinding light and obtain a light reception signal. The optical axis deflection section is configured to scan to-and-fro between two directions with the rangefinding light. The rotation angle detector is configured to detect a divergence angle between the two directions. The computation controller is configured to compute a distance between illuminated points in the two directions illuminated with the rangefinding light on the basis of rangefinding results for the illuminated points and the divergence angle between the two directions.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: June 30, 2020
    Assignee: TOPCON CORPORATION
    Inventors: Fumio Ohtomo, Kaoru Kumagai