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公开(公告)号：US11460561B2
公开(公告)日：2022-10-04
申请号：US16205420
申请日：2018-11-30
Applicant: TOPCON CORPORATION
Inventor： You Sasaki
Abstract: A technique is provided to enable check of calibrated condition of a total station (TS) having a laser scanner at a surveying site. The TS includes an optical system, a laser positioning part, a plane equation calculator, a laser scanner, a separation amount calculator, and an exterior orientation parameter calculator. The laser positioning part emits laser light on an object via the optical system to position the object. The plane equation calculator calculates an equation of a specific plane on the basis of result from the laser positioning part. The laser scanner scans the specific plane with laser light to obtain scanning points. The separation amount calculator calculates a separation amount of the respective scanning points from the specific plane. The exterior orientation parameter calculator calculates exterior orientation parameters of one or both of the laser positioning part and the laser scanner so that the separation amount will be small.
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公开(公告)号：US11385337B2
公开(公告)日：2022-07-12
申请号：US15850212
申请日：2017-12-21
Applicant: Topcon Corporation
Inventor： You Sasaki , Tadayuki Ito
Abstract: A method for calibrating unevenness of a plurality of measuring elements in an apparatus for evaluating road surface property having a plurality of measuring elements repeats steps of computing separation quantities from a calibration reference plane on a reference area regarding all measuring elements; determining a measuring element where the separation quantity is maximum from among all the measuring element to calibrate the measuring element such that a difference between point cloud data produced from a measurement value of the measuring element where the separation quantity is maximum and the calibration reference plane becomes equal or less than a predetermined value, producing a new calibration reference plane from the measurement values of the measuring elements including the calibrated measuring element, until RMS of point cloud data does not change.
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公开(公告)号：US10353072B2
公开(公告)日：2019-07-16
申请号：US15187291
申请日：2016-06-20
Applicant: TOPCON CORPORATION
Inventor： You Sasaki , Tadayuki Ito
Abstract: Detection of sunlight as noise is avoided in obtaining point clouds by using a laser scanner. A laser scanner controlling device includes a sun direction calculating unit 115, a brightness measuring unit 116, and a scan condition setting unit 118. The sun direction calculating unit 115 calculates the direction of the sun. The brightness measuring unit 116 measures the brightness of an image that contains the direction of the sun. The scan condition setting unit 118 sets a condition for restricting laser scanning in the direction of the sun when the brightness is not less than a predetermined threshold value.
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公开(公告)号：US11725938B2
公开(公告)日：2023-08-15
申请号：US16917941
申请日：2020-07-01
Applicant: Topcon Corporation
Inventor： You Sasaki
CPC classification number: G01C15/006 , G01C15/06 , G01S7/4817 , G01S17/42
Abstract: Reselection of an instrument point, due to the limited emission range of a scanning laser light, is performed with decreased burden. A total station equipped with a laser scanner has a combined structure of a total station and a laser scanner. The total station equipped with the laser scanner includes a point cloud data acquiring unit, a distance acquiring unit, and an instrument point calculator. The point cloud data acquiring unit acquires point cloud data that is obtained through laser scanning performed by the laser scanner set up at a first instrument point. The distance acquiring unit acquires a distance to the laser scanner of each point in the point cloud data. The instrument point calculator calculates a location of a second instrument point on the basis of an upper limit of the distance.
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公开(公告)号：US20220284608A1
公开(公告)日：2022-09-08
申请号：US17653632
申请日：2022-03-04
Applicant: Topcon Corporation
Inventor： You Sasaki
Abstract: Synchronizing between multiple optical data can be maintained by a facilitated method. An optical data processing operational unit 108 includes an optical data obtaining part 301 which obtains laser scan data by a laser scanner mounted on a moving body and image data of a photographed image photographed by a camera mounted on the moving body; and a delay time obtaining part 305 which calculates Δt when the point cloud image viewed from the viewpoint at time a specific time T made based on the laser scan data is obtained and the camera photographs with a delay Δt when the camera is ordered to photograph at time T; wherein relationships of exterior orientation elements of the laser scanner and the camera are known, and Δt is calculated in a condition in which difference in overlapping degree of the point cloud image and the photographed image is minimal.
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Patent Agency Ranking
公开(公告)号：US11307031B2
公开(公告)日：2022-04-19
申请号：US16168924
申请日：2018-10-24
Applicant: TOPCON CORPORATION
Inventor： You Sasaki , Yasushi Tanaka , Nobuyuki Nishita
IPC: G01S17/10 , G01S17/89 , G01S7/48 , G01C15/00 , G02B23/10 , G01S7/51 , G01S7/481 , G01S17/87 , G01C3/08 , G01S7/497 , G01C1/02 , G01S17/42
Abstract: A technique is provided to enable check of a calibrated condition of a total station (TS) having a laser scanner in a surveying site. The TS includes an optical system for sighting an object, a laser positioning part that irradiates the object with laser light via the optical system to position the object, and a plane crossing location identifying part that identifies a crossing location of multiple planes constituting a three-dimensional structure as a first location, on the basis of the positioning result from the laser positioning part. The TS also includes a laser scanner that performs laser scanning in an area containing the crossing location, a plane crossing location calculator that calculates the crossing location as a second location on the basis of laser scanning data from the laser scanner, and a comparing part that compares the first location and the second location with each other.
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公开(公告)号：US11221216B2
公开(公告)日：2022-01-11
申请号：US16963217
申请日：2019-02-14
Applicant: Topcon Corporation
Inventor： Takeshi Sasaki , Nobuyuki Fukaya , You Sasaki
Abstract: [Problem] To obtain high measurement accuracy in aerial photogrammetry while reducing the cost of installing a measurement target. [Solution] According to the present invention, a launching pad for an unmanned aircraft on which a UAV 200 is installed before take off is provided with: a target indication that constitutes a target locating point used for aerial photogrammetry; and position determining units that determine the position of the UAV 200 with respect to the launching pad in a state in which the position of the UAV 200 with respect to the target indication before take off is specified.
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公开(公告)号：US10767990B2
公开(公告)日：2020-09-08
申请号：US15923104
申请日：2018-03-16
Applicant: TOPCON CORPORATION
Inventor： You Sasaki
Abstract: Highly accurate aerial photogrammetry is performed while avoiding increase in cost. A survey data processing device includes an image data receiving part, a location data receiving part, an identification marker detecting part, an identifying part, and a location identifying part. The image data receiving part receives image data of aerial photographs of vehicles. The vehicles are equipped with GNSS location identifying units and identification markers, respectively. The location data receiving part receives location data of the vehicles that are identified by the respective GNSS location identifying units. The identification marker detecting part detects the identification markers of the vehicles from the image data. The identifying part identifies each of the vehicles in the aerial photographs. The location identifying part identifies locations of ground control points (GCPs) in the aerial photographs by using the location data of the vehicles and by using the identification information.
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公开(公告)号：US10697771B2
公开(公告)日：2020-06-30
申请号：US15890617
申请日：2018-02-07
Applicant: TOPCON CORPORATION
Inventor： Nobuyuki Nishita , Kazuki Osaragi , Yasuhito Haijima , You Sasaki , Hiroyuki Ikegami
Abstract: A survey system including a movable photographing device, a surveying device, and an analysis device. The movable photographing device includes a camera mounted on a UAV and taking a plurality of images P for photogrammetry, and a GPS unit including a first time stamping portion stamping a first time Tc relating to a photographing time on the image P taken. The surveying device determines a position of the movable photographing device, and includes a second time stamping portion stamping a second time Tt relating to a surveying time on a survey result R determined above. The analysis device includes a photographing position analysis portion associating each survey result R with a photographing position of the respective image P based on the first time Tc and the second time Tt, and generating data for photogrammetry.
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10.发明授权公开(公告)号：US10578430B2
公开(公告)日：2020-03-03
申请号：US15423746
申请日：2017-02-03
Applicant: TOPCON CORPORATION
Inventor： You Sasaki , Kazuhiro Ogawa , Tadayuki Ito
Abstract: To carry out evaluation of a road surface property easily and in a short period of time without being costly. Measurement data of a road surface measured for a predetermined road width along a path of a road to be measured is acquired; a unit area having a preset length dimension along the path in the road width is set along the path; a model plane in the unit area is set based on the measurement data at each point in the unit area; point group data is generated from a spaced amount of the model plane and each point in the unit area, visualize and display the spaced amount in the path, and display a result of evaluation obtained through statistical processing with the path shown on a map.
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