JP6991034B2 - 光波距離計及びフィードバック信号の変調周波数決定方法 - Google Patents
光波距離計及びフィードバック信号の変調周波数決定方法 Download PDFInfo
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- JP6991034B2 JP6991034B2 JP2017202901A JP2017202901A JP6991034B2 JP 6991034 B2 JP6991034 B2 JP 6991034B2 JP 2017202901 A JP2017202901 A JP 2017202901A JP 2017202901 A JP2017202901 A JP 2017202901A JP 6991034 B2 JP6991034 B2 JP 6991034B2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
- G01S7/4861—Circuits for detection, sampling, integration or read-out
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S17/36—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
- G01S17/26—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves wherein the transmitted pulses use a frequency-modulated or phase-modulated carrier wave, e.g. for pulse compression of received signals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S17/34—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/4808—Evaluating distance, position or velocity data
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/491—Details of non-pulse systems
- G01S7/4912—Receivers
- G01S7/4913—Circuits for detection, sampling, integration or read-out
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/491—Details of non-pulse systems
- G01S7/4912—Receivers
- G01S7/4917—Receivers superposing optical signals in a photodetector, e.g. optical heterodyne detection
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Measurement Of Optical Distance (AREA)
Description
2 発光素子
3 発光素子駆動回路
5 測距光
6 内部参照光
9 受光素子
10 第1分周器
14 制御演算部
15 記憶部
16 基準信号発生器
17 比較器
18 ループフィルタ
19 電圧制御発振器
21 第2分周器
22 中間周波数信号生成器
23 基準信号
24 フィードバック信号
25 比較信号
26 ローカル信号
31 曲線
32 サンプリング信号
33 中間周波数信号
Claims (3)
- 測距光を発する発光素子と、前記測距光が所定の周波数でバースト発光される様前記発光素子に所定の信号を出力する発光素子駆動回路とを有する測距光射出部と、前記測距光の一部を内部参照光として分割する光路分割部材と、測定対象物からの反射測距光及び前記内部参照光を受光しそれぞれ受光信号を発する受光素子と、前記受光信号に基づき中間周波数信号を生成する受光回路と、該受光回路を制御し、各受光信号を基に前記測定対象物迄の距離を演算する制御演算部とを具備し、
前記受光回路は所定周波数の基準信号を出力する基準信号発生器と、入力される信号の電圧に応じた周波数を有するローカル信号及びフィードバック信号を出力する電圧制御発振器と、前記ローカル信号と前記受光信号に基づき前記中間周波数信号を出力する中間周波数信号生成器と、比較器と、ループフィルタと、前記基準信号の周波数を整数分の1倍する第1分周器と、前記フィードバック信号の周波数を整数分の1倍する第2分周器とを有し、
前記比較器は前記第1分周器を介して入力される前記基準信号と前記第2分周器を介して入力される前記フィードバック信号の位相差に基づき比較信号を出力し、前記ループフィルタは前記比較信号を電圧信号として前記電圧制御発振器に出力し、該電圧制御発振器は前記比較信号に基づき前記フィードバック信号を前記基準信号と同期させ、
前記制御演算部は、前記中間周波数信号をサンプリングして得られたサンプリング信号をDFT処理して得られる曲線上で、該サンプリング信号が有する周波数と直交する周波数と前記フィードバック信号の周波数とが一致する様に前記第2分周器の倍率を設定し、前記基準信号の周波数と前記フィードバック信号の周波数とが一致する様に前記第1分周器の倍率を設定する光波距離計。 - 前記制御演算部は、前記フィードバック信号の周波数が、前記サンプリング信号が有する周波数と直交する周波数と一致する様に、サンプリングする前記中間周波数信号の区間幅を変更し、前記サンプリング信号が有する周波数と直交する周波数を変更する請求項1に記載の光波距離計。
- 電圧制御発振器から出力されるローカル信号と受光信号に基づき中間周波数信号を発し、中間周波数信号を発すると共に、周波数を整数分の1倍する第1分周器を介して基準信号発生器から発せられた基準信号と、周波数を整数分の1倍する第2分周器を介して前記電圧制御発振器から発せられたフィードバック信号との位相差に基づき前記フィードバック信号と前記基準信号を同期させる受光回路を有し、測距光の一部を分割した内部参照光と測定対象物からの反射測距光との位相差により前記測定対象物迄の距離を測定する光波距離計に於いて、前記中間周波数信号をサンプリングして得られたサンプリング信号をDFT処理し、DFT処理により得られる曲線上で、前記サンプリング信号が有する周波数と直交する周波数とフィードバック信号の周波数とが一致する様に前記第2分周器の倍率を設定し、前記基準信号の周波数と前記フィードバック信号の周波数とが一致する様に前記第1分周器の倍率を設定するフィードバック信号の変調周波数決定方法。
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JP2017202901A JP6991034B2 (ja) | 2017-10-19 | 2017-10-19 | 光波距離計及びフィードバック信号の変調周波数決定方法 |
US16/127,834 US11105903B2 (en) | 2017-10-19 | 2018-09-11 | Electronic distance meter and modulated frequency determination method of feedback signal |
EP18194123.8A EP3474035B1 (en) | 2017-10-19 | 2018-09-12 | Electronic distance meter and modulated frequency determination method of feedback signal |
CN201811204161.7A CN109683167B (zh) | 2017-10-19 | 2018-10-16 | 光波测距仪以及反馈信号的调制频率决定方法 |
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JP2009258006A (ja) | 2008-04-18 | 2009-11-05 | Sokkia Topcon Co Ltd | 光波距離計 |
US20140307248A1 (en) | 2011-11-04 | 2014-10-16 | Leica Geosystems Ag | Distance-measuring device |
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JPH05264723A (ja) * | 1992-03-23 | 1993-10-12 | Mitsubishi Heavy Ind Ltd | 測距装置 |
JP2006521536A (ja) * | 2002-11-26 | 2006-09-21 | ジェームス エフ. マンロ | 高精度の距離測定装置およびその方法 |
US20050083513A1 (en) * | 2002-12-20 | 2005-04-21 | Rogers Philip L. | Quadrature processed lidar system |
JP4330902B2 (ja) | 2003-03-06 | 2009-09-16 | モトローラ・インコーポレイテッド | 通信端末機 |
EP1672382A1 (de) | 2004-12-18 | 2006-06-21 | Leica Geosystems AG | Einkanal-Heterodyn -Distanzmessverfahren |
JP5014382B2 (ja) | 2009-06-17 | 2012-08-29 | 株式会社 ソキア・トプコン | 光波距離計 |
EP3690488B1 (de) * | 2014-03-25 | 2022-12-14 | Elmos Semiconductor SE | Sensorsystem zur erkennung mindestens eines objekts in einer übertragungsstrecke |
JP6254741B1 (ja) * | 2017-07-19 | 2017-12-27 | 株式会社Epark | 順番待ちシステム、順番待ち管理装置、順番待ち行列の制御方法、及びプログラム |
US10534084B2 (en) * | 2017-07-27 | 2020-01-14 | Blackmore Sensors & Analytics, Llc | Method and system for using square wave digital chirp signal for optical chirped range detection |
CN109425866A (zh) * | 2017-09-01 | 2019-03-05 | 姚晓天 | 应用光电振荡器(oeo)的光测距雷达(lidar)和光频域反射计(ofdr)系统 |
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JP2009258006A (ja) | 2008-04-18 | 2009-11-05 | Sokkia Topcon Co Ltd | 光波距離計 |
US20140307248A1 (en) | 2011-11-04 | 2014-10-16 | Leica Geosystems Ag | Distance-measuring device |
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CN109683167A (zh) | 2019-04-26 |
US11105903B2 (en) | 2021-08-31 |
JP2019078531A (ja) | 2019-05-23 |
EP3474035A1 (en) | 2019-04-24 |
CN109683167B (zh) | 2022-12-20 |
EP3474035B1 (en) | 2022-05-11 |
US20190120944A1 (en) | 2019-04-25 |
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