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公开(公告)号：US10767991B2
公开(公告)日：2020-09-08
申请号：US15784563
申请日：2017-10-16
Applicant: TOPCON Corporation
Inventor： Fumio Ohtomo , Kaoru Kumagai
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 measurement range.
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公开(公告)号：US20200271758A1
公开(公告)日：2020-08-27
申请号：US16799967
申请日：2020-02-25
Applicant: TOPCON Corporation
Inventor： Kaoru Kumagai , Minoru Chiba , Akinobu Sugiura
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.
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公开(公告)号：US10712153B2
公开(公告)日：2020-07-14
申请号：US15477691
申请日：2017-04-03
Applicant: TOPCON CORPORATION
Inventor： Kaoru Kumagai , Satoshi Yanobe , Tetsutaro Kouji
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.
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公开(公告)号：US20200096334A1
公开(公告)日：2020-03-26
申请号：US16571572
申请日：2019-09-16
Applicant: TOPCON Corporation
Inventor： Fumio Ohtomo , Ikuo Ishinabe , Kaoru Kumagai
Abstract: A surveying instrument comprises a distance measuring light projecting module, a light receiving module, an optical axis deflector which integrally deflects a distance measuring optical axis and a light receiving optical axis, a wide-angle image pickup module, a projecting direction detecting module configured to detect an optical axis deflection angle and a deflecting direction, a narrow-angle image pickup module, a distance measurement calculating module and an arithmetic control module, wherein the arithmetic control module is configured to control the optical axis deflector and the distance measurement calculating module, wherein the distance measurement calculating module is configured to perform a distance measurement of a measuring point based on a light emission timing of a distance measuring light and a light reception timing of a reflected distance measuring light, and wherein the narrow-angle image pickup module is configured to acquire a narrow-angle image with the distance measuring optical axis as an image center.
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公开(公告)号：US20190162853A1
公开(公告)日：2019-05-30
申请号：US16195988
申请日：2018-11-20
Applicant: TOPCON Corporation
Inventor： Kaoru Kumagai , Ken-ichiro Yoshino
Abstract: A surveying instrument comprises a first measuring component having a control module and a second measuring component, wherein the control module acquires point cloud data of a whole circumference in a room with the use of the second measuring component in accordance with each installation point, makes the first measuring component to measure a predetermined position in the room, prepares outer shape data of a same height and a same shape in accordance with each installation point based on a measurement result of the first measuring component or the second measuring component, performs a shape matching of each outer shape data, and registers each point cloud data based on a movement amount and a rotation amount at the time of performing the shape matching.
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Patent Agency Ranking
公开(公告)号：US10211387B2
公开(公告)日：2019-02-19
申请号：US15463920
申请日：2017-03-20
Applicant: TOPCON CORPORATION
Inventor： Kaoru Kumagai , Satoshi Yanobe , Tetsutaro Kouji
IPC: H02P23/20 , H01L41/04 , B06B1/06 , G01C3/08 , G01D5/347 , G01S3/786 , H01L41/09 , G01C15/00 , H02N2/14 , H02N2/16
Abstract: Provided is a method for controlling an ultrasonic motor to reduce noise sounding during low-speed rotation in a surveying instrument adopting the ultrasonic motor for a rotary shaft, and a surveying instrument for the same. In a method for controlling an ultrasonic motor according to an aspect of the present invention, in a low-speed rotation range of an ultrasonic motor, a ratio of an acceleration period as a time of application of the drive signal in a control cycle is controlled, and a time to start the acceleration period is randomly shifted for each control cycle. In a method for controlling an ultrasonic motor according to another aspect, a time to start the acceleration period is regularly shifted for each control cycle. In a method for controlling an ultrasonic motor according to still another aspect, second-half acceleration control and first-half acceleration control are alternately repeated.
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公开(公告)号：US11333496B2
公开(公告)日：2022-05-17
申请号：US16398354
申请日：2019-04-30
Applicant: TOPCON Corporation
Inventor： Fumio Ohtomo , Kaoru Kumagai , Tetsuji Anai
Abstract: A surveying instrument comprises a monopod installed on a reference point, a surveying instrument main body provided at a known distance from a lower end of the monopod and at a known angle with respect to an axis of the monopod and having a reference optical axis, wherein the surveying instrument main body performs an image pickup of an object to be measured and scans the object to be measured by a closed loop scan pattern respectively at a pre-rotation and a post-rotation of the surveying instrument main body, obtains cross points of a locus of a scan pattern of the pre-rotation and the post-rotation, obtains deflection angles of the cross point with respect to the reference optical axis of the pre-rotation and the post-rotation, and calculates a rotation angle of the surveying instrument main body based on a deviation between both of the deflection angles.
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公开(公告)号：US11150346B2
公开(公告)日：2021-10-19
申请号：US15667668
申请日：2017-08-03
Applicant: TOPCON Corporation
Inventor： Fumio Ohtomo , Kaoru Kumagai , Tetsuji Anai
Abstract: A measuring method, wherein point cloud data of a building is acquired by a laser scanner, wherein the laser scanner has an attitude detector for detecting a tilting with respect to a horizontality or a verticality, converts the point cloud data into a horizontal distance and a height or a difference of a height based on the tilting detected by the attitude detector, sets a height line at a predetermined height on a wall surface, averages a horizontal distance information of the point cloud data included in a predetermined width with the height line as a center in a height direction, further develops the horizontal distance information along the height line in a horizontal direction, and measures a horizontal cross section at the predetermined height.
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公开(公告)号：US11029154B2
公开(公告)日：2021-06-08
申请号：US15975049
申请日：2018-05-09
Applicant: TOPCON CORPORATION
Inventor： Hideyuki Matsumoto , Fumio Ohtomo , Kaoru Kumagai
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.
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公开(公告)号：US20210116241A1
公开(公告)日：2021-04-22
申请号：US17070966
申请日：2020-10-15
Applicant: TOPCON Corporation
Inventor： Fumio Ohtomo , Nobuyuki Nishita , Kaoru Kumagai
IPC: G01C15/00
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 the first shaft and the second shaft in a stationary state of the tilt detecting device, and to perform the calibration of the tilt sensor based on the detection signals output from the tilt sensor before and after the reversal.
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