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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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公开(公告)号：US20220317149A1
公开(公告)日：2022-10-06
申请号：US17704157
申请日：2022-03-25
Applicant: TOPCON CORPORATION
Inventor： Fumio Ohtomo , Satoshi Yanobe , Kaoru Kumagai , Naoki Shoji
IPC: G01P15/18 , G01P15/093 , G01P15/08
Abstract: An inner frame is rotatably supported by the outer frame via a first shaft, the inertia detecting unit is rotatably supported by the inner frame via a second shaft orthogonal to the first shaft, a first encoder for detecting a rotation angle between the outer frame and the inner frame, a second encoder for detecting a rotation angle between the inner frame and the inertia detecting unit, and rotation powers are provided on the respective shafts. And the arithmetic processing module is configured to drive the respective rotation powers to make the inertia detecting unit to perform a reversal operation of 180° or one rotation at least once based on outputs from the respective encoders regarding the first shaft and the second shaft and to detect a tilt and a rotation based on detection signals output from the inertia detecting unit before and after the reversal.
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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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Patent Agency Ranking
公开(公告)号：US11353586B2
公开(公告)日：2022-06-07
申请号：US16829471
申请日：2020-03-25
Applicant: Topcon Corporation
Inventor： Naoki Shoji
Abstract: A light wave distance meter according to the present invention includes: a light-emitting element that emits a distance measurement light; a light-receiving element that outputs a light-receiving signal; a frequency conversion unit that includes a bandpass filter; an arithmetic control unit that computes a distance value to a measurement object; a signal generator that generates a signal having a predetermined frequency; a waveform conversion unit that generates a waveform conversion signal; pulse generators that generate pulse signals by pulsating the signal having a predetermined frequency so as to have a waveform profile of a signal constituted of desired frequency components on the basis of the signal output from the signal generator and the waveform conversion signal output from the waveform conversion unit; and a drive unit that emits the distance measurement light based on the pulse signals.
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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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8.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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9.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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