JP2016161411A - 光波距離計 - Google Patents
光波距離計 Download PDFInfo
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- JP2016161411A JP2016161411A JP2015040504A JP2015040504A JP2016161411A JP 2016161411 A JP2016161411 A JP 2016161411A JP 2015040504 A JP2015040504 A JP 2015040504A JP 2015040504 A JP2015040504 A JP 2015040504A JP 2016161411 A JP2016161411 A JP 2016161411A
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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
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
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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
- G01S7/4865—Time delay measurement, e.g. time-of-flight measurement, time of arrival measurement or determining the exact position of a peak
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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
- G01S17/10—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
- G01S17/36—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
- 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
- G01S7/4915—Time delay measurement, e.g. operational details for pixel components; Phase measurement
-
- 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
- G01S7/497—Means for monitoring or calibrating
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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)
Abstract
【解決手段】複数の近接周波数をそれぞれ断続し、所定幅にパルス化した断続変調測距光28を近接周波数毎に順次切替え射出する。測定対象物からの反射測距光28′を受光し、それぞれの所定の周波数の差を有する基準周波数信号と断続受光信号をミキシングにより周波数変換し、それぞれの近接周波数信号に対応し、パルス幅を有する断続変換信号を得る。断続受光信号のパルス幅が、断続変換信号の周期より長い時間幅となる様に設定され、複数の近接周波数に対し断続受光信号の位相を求め精密測定距離を演算し、又各断続変換信号相互の位相差を求めて粗測定距離値を演算し、粗測定距離値と精密測定距離値とを合わせることにより距離を測定する。
【選択図】図2
Description
2 射出光学系
3 受光光学系
4 視準光学系
5 測定対象物
6 測距光軸
7 射出光軸
8 受光光軸
9 視準光軸
11 発光素子
14 光量調整器
18 ダイクロイックミラー
21 受光素子
24 内部参照光学系
25 光路切替え器
27 演算処理部
31 基準信号発生器
33 第1信号発生器
34 第2信号発生器
35 第1断続パルス発生器
36 第2断続パルス発生器
39 タイミング信号発生器
43 ミキシング回路
47 演算制御部
Claims (6)
- 測距光を発する発光素子と、複数の近接周波数を生成する信号発生器と、前記複数の近接周波数をそれぞれ断続し、所定幅にパルス化した変調信号と、該変調信号により所定幅にパルス化した断続変調測距光を前記近接周波数毎に順次切替え射出する射出光学系と、測定対象物からの反射測距光を受光し、所定パルス幅の断続受光信号を発生する受光部と、それぞれの所定の周波数の差を有する基準周波数信号を発する基準信号発生器と、前記受光部からの前記断続受光信号を前記基準周波数信号とのミキシングにより周波数変換し、それぞれの近接周波数信号に対応し、パルス幅を有する断続変換信号を得る周波数変換部と、演算制御部とを具備し、前記断続受光信号のパルス幅が、前記断続変換信号の周期より長い時間幅となる様に設定され、又前記断続受光信号の周期は前記測定対象物が移動体であった場合に、該移動体の移動による前記断続変換信号の位相変化が無視できる早さに設定され、前記演算制御部は、複数の近接周波数に対し前記断続受光信号の位相を求め精密測定距離を演算し、又前記各断続変換信号相互の位相差を求めて粗測定距離値を演算し、該粗測定距離値と精密測定距離値とを合わせることにより距離を測定する様構成したことを特徴とする光波距離計。
- 前記断続変調測距光を所定の断続数で一巡する断続パターンを生成させ、前記断続変換信号を断続パターン毎に複数回積算し、得られた積算波形の断続幅、断続周期から、複数の近接周波数を特定し、それぞれの断続変換信号の平均位相を求め、平均位相から精密測定距離値を求め、前記各断続変換信号相互の平均位相差から粗測定距離値を求め、精密測定距離値と、粗測定距離値から測定対象物の距離を測定する請求項1に記載の光波距離計。
- 複数の近接周波数の内、少なくとも2つに対応する断続変換信号の周波数は同じである請求項1に記載の光波距離計。
- 前記演算制御部は、前記断続変調測距光の受光パルスの遅延時間で測距を行う請求項1に記載の光波距離計。
- 前記演算制御部は、複数の近接周波数から得られた精密測定距離値と粗測定距離値の差が所定値以内でない場合、異常信号を発生させる請求項1に記載の光波距離計。
- 複数の近接周波数の断続切替えは、各周波数毎に、所定の周期ずらして行い、周波数変換された前記断続変換信号は、所定の周期ずらしてから位相測定を行う請求項1に記載の光波距離計。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2015040504A JP6410258B2 (ja) | 2015-03-02 | 2015-03-02 | 光波距離計 |
US15/051,706 US10101441B2 (en) | 2015-03-02 | 2016-02-24 | Electro-optical distance meter |
EP16157707.7A EP3064962A1 (en) | 2015-03-02 | 2016-02-26 | Electro-optical distance meter |
CN201610117022.5A CN105938197B (zh) | 2015-03-02 | 2016-03-02 | 光波测距仪 |
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JP2015040504A JP6410258B2 (ja) | 2015-03-02 | 2015-03-02 | 光波距離計 |
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JP2018175094A Division JP6609360B2 (ja) | 2018-09-19 | 2018-09-19 | 光波距離計 |
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JP2016161411A true JP2016161411A (ja) | 2016-09-05 |
JP6410258B2 JP6410258B2 (ja) | 2018-10-24 |
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US (1) | US10101441B2 (ja) |
EP (1) | EP3064962A1 (ja) |
JP (1) | JP6410258B2 (ja) |
CN (1) | CN105938197B (ja) |
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2016
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US20160259039A1 (en) | 2016-09-08 |
US10101441B2 (en) | 2018-10-16 |
CN105938197B (zh) | 2021-04-09 |
CN105938197A (zh) | 2016-09-14 |
EP3064962A1 (en) | 2016-09-07 |
JP6410258B2 (ja) | 2018-10-24 |
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