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1.发明申请公开(公告)号：US20250093155A1
公开(公告)日：2025-03-20
申请号：US18961601
申请日：2024-11-27
Applicant: Topcon Corporation
Inventor： Takeshi SASAKI , Hideki MORITA
IPC: G01C15/00
Abstract: A method and apparatus for determining the position of a laser scanner using one or more optical targets, each arranged at a known point. The apparatus includes: a ground control point position obtaining part which obtains information of arrangement positions of multiple optical reflection targets; a laser scanner approximate position data obtaining part which obtains an approximate position of a laser scanner; a laser scanning data obtaining part which obtains data of multiple luminescent points; a processing objective point extracting part which extracts multiple luminescent points having luminance exceeding a specific threshold value; and a laser scanner position calculating part which gives data of the arrangement position of the optical reflection target to each of the extracted multiple luminescent points so as to calculate position of the laser scanner.
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2.发明公开公开(公告)号：US20230258450A1
公开(公告)日：2023-08-17
申请号：US18168586
申请日：2023-02-14
Applicant: TOPCON CORPORATION
Inventor： Hiroaki SUGIMOTO , Hideki MORITA
IPC: G01C15/00
CPC classification number: G01C15/002
Abstract: A technique for solving problems in laser scanning related to intense light that is reflected back from a reflector target is provided. A laser scanning control device for controlling laser scanning performed by a laser scanning apparatus includes a controller, a distance acquisition unit, and a light controller. The controller executes first laser scanning and second laser scanning. The first laser scanning is performed under conditions in which a detector of the laser scanning apparatus is saturated by light reflected back from each of reflection prisms. The second laser scanning is performed under conditions in which saturation of the detector of the laser scanning apparatus does not occur. The distance acquisition unit acquires distances to the reflection prisms based on the first laser scanning. The light controller adjusts intensity of light to be detected in the second laser scanning, based on the distances to the reflection prisms.
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公开(公告)号：US20230081870A1
公开(公告)日：2023-03-16
申请号：US17931138
申请日：2022-09-12
Applicant: TOPCON CORPORATION
Inventor： Hideki MORITA , Yoshikatsu TOKUDA
Abstract: Scanning density of laser scanning is increased at low cost. A laser scanning apparatus includes a horizontal rotation unit and a controller. The horizontal rotation unit determines an area of laser scanning. The controller controls rotation of the horizontal rotation unit. The horizontal rotation unit is rotated while the laser scanning is performed, whereby scanning using laser scanning light is performed in a vertical angle direction at a predetermined interval. The controller makes the horizontal rotation unit repeatedly rotate multiple times in angular ranges that partially overlap one another, in order to perform the laser scanning multiple times on areas of the laser scanning that overlap one another. Start positions of the rotation of multiple times of the horizontal rotation unit are successively shifted by a predetermined amount. The predetermined amount of shifting corresponds to a distance shorter than the predetermined interval.
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公开(公告)号：US20180088213A1
公开(公告)日：2018-03-29
申请号：US15711299
申请日：2017-09-21
Applicant: TOPCON CORPORATION
Inventor： Hideki MORITA , Ken' ichiro YOSHINO
Abstract: A technique for decreasing attenuation of emitted pulsed light with a pulse width of 2 ns or less is provided. A light emitting circuit configured to emit pulsed light includes a boosting block, a laser diode, a wiring, a charge capacitor with its end connected to the wiring, and a switching element configured to be turned on or off to apply voltage to the laser diode. The inductance of the wiring is not greater than 1.4 nH. The laser diode emits pulsed light with a pulse width of 2 ns or less.
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公开(公告)号：US20180074197A1
公开(公告)日：2018-03-15
申请号：US15702951
申请日：2017-09-13
Applicant: TOPCON CORPORATION
Inventor： Hideki MORITA , Ken'ichiro YOSHINO
IPC: G01S17/10
CPC classification number: G01S17/10 , G01S7/4861 , G01S7/497
Abstract: A distance measuring device is provided at low cost. The distance measuring device includes an avalanche photodiode, a TIA, and damping circuits. The avalanche photodiode detects pulsed light that is reflected from an object to be measured. The TIA is an amplifier circuit that converts electric current output from the avalanche photodiode into a voltage signal. The damping circuits and are arranged in a rear stage of the TIA and convert pulse signals into signals with a damped oscillation waveform. The signal path from the avalanche photodiode to the TIA allows a direct current signal to pass therethrough.
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Patent Agency Ranking
公开(公告)号：US20240102800A1
公开(公告)日：2024-03-28
申请号：US18470744
申请日：2023-09-20
Applicant: TOPCON CORPORATION
Inventor： You SASAKI , Hideki MORITA , Hiroaki SUGIMOTO , Yuto SUZUKI , Shuichi MINAMIGUCHI , Nobuyuki NISHITA , Hideyuki MATSUMOTO
CPC classification number: G01C9/06 , G01C15/06 , G01C2009/066
Abstract: Efficiency of operation related to acquisition of a tilt offset of a surveying apparatus is improved. A total station includes a tilt sensor, a tilt offset acquisition unit that acquires a tilt offset of the tilt sensor, a measurement unit that measures a variable value of a phenomenon that can cause the tilt offset to vary, and a determination unit that determines whether to acquire the tilt offset, based on output from the measurement unit.
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公开(公告)号：US20230080388A1
公开(公告)日：2023-03-16
申请号：US17931123
申请日：2022-09-11
Applicant: TOPCON CORPORATION
Inventor： Hideki MORITA , Yoshikatsu TOKUDA
Abstract: Scanning density of laser scanning is increased at low cost. A laser scanning apparatus includes a vertical rotation unit and a controller. The vertical rotation unit emits pulses of laser scanning light. The controller controls emission of pulses of the laser scanning light. Assuming that a symbol “n” is a natural number of one or more, the controller controls so that a position in a rotation direction of emission of pulses of the laser scanning light for (n+1)th rotation of the vertical rotation unit will be different from that for nth rotation of the vertical rotation unit.
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公开(公告)号：US20190227171A1
公开(公告)日：2019-07-25
申请号：US16369670
申请日：2019-03-29
Applicant: TOPCON CORPORATION
Inventor： Hideki MORITA , Ken'ichiro YOSHINO
Abstract: A circuit configured to emit pulsed light includes a voltage generating circuit, a light emitting element, a circuit wiring that connects the voltage generating circuit and the light emitting element, a charge capacitor with its end connected to the circuit wiring, and a switching element configured to be turned on or off to apply voltage to the light emitting element. The inductance component for the circuit wiring is derived based on a relationship of the pattern length, pattern width and pattern thickness of the circuit wiring. In this manner, an inductance value of not greater than 1.4 nH can be set and suitably used for achieving an attenuation of at or below 3 dB in a circuit emitting light at a pulse width of 2 ns or less.
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公开(公告)号：US20180284238A1
公开(公告)日：2018-10-04
申请号：US15935138
申请日：2018-03-26
Applicant: TOPCON CORPORATION
Inventor： Hideki MORITA , Ken'ichiro YOSHINO , Yasushi TANAKA
CPC classification number: G01S7/4818 , G01B11/002 , G01C15/002 , G01S7/4813 , G01S17/42 , G01S17/89
Abstract: A three-dimensional measurement device includes a light source unit that emits distance measurement light, a projection light optical system that causes the distance measurement light, emitted by the light source unit, to be emitted along a distance measurement light axis, a light receiving optical unit that receives the reflected distance measurement light, a light receiving and splitting unit that splits the reflected distance measurement light that has transmitted through the light receiving optical unit into first reflected split light and second reflected split light, attenuates intensity of the second reflected split light to be lower than intensity of the first reflected split light, and converts the first reflected split light and the second reflected split light into electrical signals, and angle detection units that detect a light emitting direction of the distance measurement light.
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10.发明申请公开(公告)号：US20220307832A1
公开(公告)日：2022-09-29
申请号：US17655702
申请日：2022-03-21
Applicant: Topcon Corporation
Inventor： Takeshi SASAKI , Hideki MORITA
Abstract: A method and apparatus for determining the position of a laser scanner using one or more optical targets, each arranged at a known point. The apparatus includes: a ground control point position obtaining part which obtains information of arrangement positions of multiple optical reflection targets; a laser scanner approximate position data obtaining part which obtains an approximate position of a laser scanner; a laser scanning data obtaining part which obtains data of multiple luminescent points; a processing objective point extracting part which extracts multiple luminescent points having luminance exceeding a specific threshold value; and a laser scanner position calculating part which gives data of the arrangement position of the optical reflection target to each of the extracted multiple luminescent points so as to calculate position of the laser scanner.
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