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公开(公告)号：US20200072977A1
公开(公告)日：2020-03-05
申请号：US16544846
申请日：2019-08-19
Applicant: TOPCON CORPORATION
Inventor： Naoki Shoji , Masae Matsumoto
Abstract: An electro-optical distance measurement method includes: a light emitting step of switchably outputting a first distance measuring light and a second distance measuring light; a photodetection step of receiving a first reflected distance measuring light and a second reflected distance measuring light; an arithmetic step of frequency-converting a photodetection signal to generate a first difference frequency signal and a second difference frequency signal; and a determining step of determining whether identification information indicating a host device is included in the photodetection signal, wherein the light emitting step involves driving a light emitting element so that the identification information is included in a light emission signal, and the arithmetic step involves calculating the distance value when it is determined in the determining step that the identification information is included in the photodetection signal.
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2.发明申请公开(公告)号：US20180356522A1
公开(公告)日：2018-12-13
申请号：US16000261
申请日：2018-06-05
Applicant: TOPCON Corporation
Inventor： Masaho Kikuchi , Naoki Shoji , Masae Matsumoto
CPC classification number: G01S17/36 , G01B9/02004
Abstract: A phase difference frequency generating method comprising: cutting out a reference signal, which is a continuous signal with a predetermined frequency, in a predetermined time and at a predetermined time interval by a signal for intermitting and creating a first intermittent signal, shifting the signal for intermitting by a time corresponding to π/a (a=natural number) of a fundamental frequency of the reference signal, cutting out the reference signal in the predetermined time and at the predetermined time interval by the signal for intermitting as shifted and creating a second intermittent signal, and carrying out a restoration processing for restoring the second intermittent signal by a time as shifted.
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Patent Agency Ranking
3.发明申请公开(公告)号：US20190120944A1
公开(公告)日：2019-04-25
申请号：US16127834
申请日：2018-09-11
Applicant: TOPCON Corporation
Inventor： Naoki Shoji , Masae Matsumoto
Abstract: An electronic distance meter comprises a distance measuring light projecting module, a photodetector, a photodetection circuit, and a control arithmetic module, wherein the distance measuring light projecting module has a light emitter, the light emitter emits a distance measuring light, the photodetector receives a reflected distance measuring light from an object to be measured and produces photodetection signals, the photodetection circuit generates an intermediate frequency signal based on the photodetection signals, and the control arithmetic module controls the photodetection circuit and calculates a distance to the object to be measured based on each of the photodetection signals, and wherein the control arithmetic module coincides a frequency orthogonal to a frequency which a sampling signal has with a frequency of a feedback signal on a curve, which is acquired by performing a DFT processing on the sampling signal acquired by sampling the intermediate frequency signal.
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公开(公告)号：US12123543B2
公开(公告)日：2024-10-22
申请号：US17655548
申请日：2022-03-19
Applicant: Topcon Corporation
Inventor： Fumitoshi Kasahara , Fumio Ohtomo , Naoki Shoji , Masae Matsumoto , Jun Abe
CPC classification number: F16M11/123 , F16M11/18 , G01C15/008
Abstract: The inclination sensor includes a gimbal mechanism rotatably supported around a first shaft and a second shaft, a first motor, a second motor, an acceleration sensor disposed in the gimbal mechanism with an origin point of coordinate axes being coincident with a point of intersection of a shaft center of the first shaft and a shaft center of the second shaft, and a control unit that simultaneously rotates the first shaft and the second shaft to continuously rotate the acceleration sensor around the first shaft and the second shaft and applies frequency analysis to the output values from the acceleration sensor to arithmetically determine the inclination angle with respect to the horizontal direction.
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公开(公告)号：US11269074B2
公开(公告)日：2022-03-08
申请号：US16544846
申请日：2019-08-19
Applicant: TOPCON CORPORATION
Inventor： Naoki Shoji , Masae Matsumoto
Abstract: An electro-optical distance measurement method includes: a light emitting step of switchably outputting a first distance measuring light and a second distance measuring light; a photodetection step of receiving a first reflected distance measuring light and a second reflected distance measuring light; an arithmetic step of frequency-converting a photodetection signal to generate a first difference frequency signal and a second difference frequency signal; and a determining step of determining whether identification information indicating a host device is included in the photodetection signal, wherein the light emitting step involves driving a light emitting element so that the identification information is included in a light emission signal, and the arithmetic step involves calculating the distance value when it is determined in the determining step that the identification information is included in the photodetection signal.
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公开(公告)号：US11105926B2
公开(公告)日：2021-08-31
申请号：US16000261
申请日：2018-06-05
Applicant: TOPCON Corporation
Inventor： Masaho Kikuchi , Naoki Shoji , Masae Matsumoto
IPC: G01S17/36 , G01B9/02 , G01S7/4915 , G01S7/4911
Abstract: A phase difference frequency generating method comprising: cutting out a reference signal, which is a continuous signal with a predetermined frequency, in a predetermined time and at a predetermined time interval by a signal for intermitting and creating a first intermittent signal, shifting the signal for intermitting by a time corresponding to π/a (a=natural number) of a fundamental frequency of the reference signal, cutting out the reference signal in the predetermined time and at the predetermined time interval by the signal for intermitting as shifted and creating a second intermittent signal, and carrying out a restoration processing for restoring the second intermittent signal by a time as shifted.
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7.发明授权公开(公告)号：US11105903B2
公开(公告)日：2021-08-31
申请号：US16127834
申请日：2018-09-11
Applicant: TOPCON Corporation
Inventor： Naoki Shoji , Masae Matsumoto
IPC: G01C3/08 , G01S7/4861 , G01S7/48 , G01S17/36 , G01S7/4913 , G01S7/4912 , G01S17/26 , G01S17/34
Abstract: An electronic distance meter comprises a distance measuring light projecting module, a photodetector, a photodetection circuit, and a control arithmetic module, wherein the distance measuring light projecting module has a light emitter, the light emitter emits a distance measuring light, the photodetector receives a reflected distance measuring light from an object to be measured and produces photodetection signals, the photodetection circuit generates an intermediate frequency signal based on the photodetection signals, and the control arithmetic module controls the photodetection circuit and calculates a distance to the object to be measured based on each of the photodetection signals, and wherein the control arithmetic module coincides a frequency orthogonal to a frequency which a sampling signal has with a frequency of a feedback signal on a curve, which is acquired by performing a DFT processing on the sampling signal acquired by sampling the intermediate frequency signal.
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