CN105301597A - Novel phase type laser range finder and phase calibration method thereof - Google Patents
Novel phase type laser range finder and phase calibration method thereof Download PDFInfo
- Publication number
- CN105301597A CN105301597A CN201510657441.3A CN201510657441A CN105301597A CN 105301597 A CN105301597 A CN 105301597A CN 201510657441 A CN201510657441 A CN 201510657441A CN 105301597 A CN105301597 A CN 105301597A
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- laser
- electric control
- optical switch
- control optical
- 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
- 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
-
- 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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention discloses a novel phase type laser range finder which comprises a laser transmitting device, a laser receiving device, a signal unit, a light splitting device and a central processing unit. The light splitting device splits a transmitted laser beam into calibrating laser and measuring laser. The light splitting device is provided with a first electric control optical switch and a second electric control optical switch. The calibrating laser is transmitted out through the first electric control optical switch. The measuring laser is transmitted out through the second electric control optical switch. The central processing unit is connected with the first electric control optical switch and the second electric control optical switch and controls the two electric control optical switches for realizing fixed-time switching-on. The phase type laser range finder provided by the invention utilizes the electric control optical switches for performing fixed-time controlling on the calibrating laser and the measuring laser, and furthermore realizes insulation and quick switching between the two laser beams, thereby ensuring excellent system temperature characteristic and operation stability. Furthermore the phase type laser range finder has advantages of simple structure, convenient maintenance, low production cost and high cost performance.
Description
Technical field
The present invention relates to laser ranging field, be specifically related to a kind of novel phase type laser range finder and phase alignment thereof.
Background technology
Present laser ranging has been widely used in life and engineering, and the phase alignment adopted in existing phase laser distance measurement product has following several: one is adopt the calibration of circuit frequency mixer; Two is adopt mechanical turnover device to carry out switching calibration to light path; Three is be provided with independent optical paths for calibration.But, there is shortcoming separately in above-mentioned phase alignment: when adopting the calibration of circuit frequency mixer, cannot accurate alignment because the avalanche diode gain error that causes of variation of ambient temperature; And when adopting mechanical turnover device to carry out switching calibration to light path, mechanical overturn precision and underspeed, physical construction is fragile simultaneously, and serviceable life is short; Independent optical paths is set and then can carries out accurate calibration for calibration, but its device needs strict coupling, with high costs.
Summary of the invention
In order to solve existing phase laser distance measurement product Problems existing, the object of the present invention is to provide a kind of novel phase type laser range finder and phase alignment thereof.
The technical solution adopted in the present invention is:
A kind of novel phase type laser range finder, comprising:
Laser beam emitting device, for Emission Lasers;
Laser receiver, for receiving calibration laser and measurement laser, and is sent to signal element the signal extracted;
Signal element, for providing the drive singal of Laser emission, receives the signal that laser receiver provides simultaneously;
Light-dividing device, laser beam for being launched by laser beam emitting device is divided into calibration laser and measurement laser, described light-dividing device is provided with the first electric control optical switch and the second electric control optical switch, calibration is with laser by directive laser receiver direct after the first electric control optical switch, and measurement is reflected to laser receiver through target after passing through the second electric control optical switch with laser;
Central processing unit, described central processing unit connects the first electric control optical switch, the second electric control optical switch and signal element respectively, and central processing unit is used for analyzing the signal of signal element, controls two electric control optical switch timesharing simultaneously and opens.
As the further improvement of technique scheme, described first electric control optical switch and the second electric control optical switch are liquid crystal board.
As the further improvement of technique scheme, described first electric control optical switch and the second electric control optical switch are the high permeability liquid crystal board of TN type high speed.
As the further improvement of technique scheme, described laser receiver is avalanche diode.
As the further improvement of technique scheme, be provided with signal amplifier in described signal element, the signal that described laser receiver provides enters in signal element after signal amplifier.
Based on a phase alignment for above-mentioned novel phase type laser range finder, comprise the following steps:
S1, laser beam emitting device Emission Lasers bundle are in light-dividing device;
The laser beam that laser beam emitting device is launched is divided into a drive test amount laser by S2, light-dividing device, a road calibration laser;
S3, central processing unit send steering order, make the first electric control optical switch conducting, the second electric control optical switch cut-off, and calibration laser enters laser receiver by light-dividing device and processes;
S4, central processing unit send steering order, make the first electric control optical switch cut-off, the second electric control optical switch conducting, and measurement by after light-dividing device with laser, enters laser receiver by target reflection and processes;
S5, laser receiver extract the signal of two bundle laser and are sent to signal element, the phase information of being carried by central processing unit analyzing and processing calibration laser and measurement laser;
The phase information that S6, central processing unit obtain according to above-mentioned steps 5 analysis, by the drive singal of control signal unit, calibrates system initial phase.
The invention has the beneficial effects as follows:
Contrast prior art, novel phase type laser range finder of the present invention utilizes electric control optical switch to carry out Time-sharing control to calibration laser and measurement laser, reaches the effect by two bundle laser isolation and rapid translating, thus has the following advantages:
1, calibration laser and measurement laser share laser beam emitting device and laser receiver, thus ensure splendid system temperature characteristic;
2, the photoswitch of light-dividing device adopts automatically controlled mode to control, and without any mechanical movement means, precision is accurate, and long service life, has fabulous degree of stability when ensureing that this stadimeter runs simultaneously;
3, stadimeter structure of the present invention is simple, easy to maintenance, production cost is low, has high cost performance, is convenient to promote.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the schematic diagram of novel phase type laser range finder of the present invention when measuring;
Fig. 2 is the structural representation of light-dividing device.
Embodiment
With reference to Fig. 1, Fig. 2, preferred embodiment provided by the invention, a kind of novel phase type laser range finder, comprises laser beam emitting device 1, laser receiver 2, signal element 3, light-dividing device 4 and central processing unit 5.
Described signal element 3 connects laser beam emitting device 1, and signal element 3 provides drive singal, driving laser emitter 1 Emission Lasers bundle.
Be provided with spectroscope in described light-dividing device 4, the laser beam that laser beam emitting device 1 is launched is divided into calibration laser and measurement laser by spectroscope.Light-dividing device 4 is also provided with the first electric control optical switch 41 and the second electric control optical switch 42, calibration is with laser by directive laser receiver 2 direct after the first electric control optical switch 41, and measurement laser is by reflecting to laser receiver 2 through target 6 after the second electric control optical switch 42.Preferably, described first electric control optical switch 41 and the second electric control optical switch 42 are the high permeability liquid crystal board of TN type high speed.
Described laser receiver 2 receives calibration laser and measurement laser, and in the present embodiment, described laser receiver 2 is avalanche diode.Laser receiver 2 connection signal unit 3, the phase signal extracted from calibration laser and measurement laser is sent to signal element 3 by laser receiver 2.
Signal amplifier is provided with, for the phase signal that amplifying laser receiving trap 2 inputs in described signal element 3.
Described central processing unit 5 connects the first electric control optical switch 41, second electric control optical switch 42 and signal element 3 respectively.Central processing unit 5 is opened for controlling two electric control optical switch timesharing, realizes, by two isolation of bundle laser and rapid translating, being convenient to collect calibrating signal and measuring-signal; Central processing unit 5 also can be analyzed, for calibrating system initial phase the phase signal that signal element 3 receives.
Utilize novel phase type laser range finder of the present invention to carry out phase alignment, comprise the following steps: S1, laser beam emitting device 1 Emission Lasers bundle are in light-dividing device 4; The laser beam that laser beam emitting device 1 is launched is divided into a drive test amount laser by S2, light-dividing device 4, a road calibration laser; S3, central processing unit 5 send steering order, and make the first electric control optical switch 41 conducting, the second electric control optical switch 42 ends, and calibration laser enters laser receiver 2 by light-dividing device 4 and processes; S4, central processing unit 5 send steering order, and the first electric control optical switch 41 is ended, the second electric control optical switch 42 conducting, and measurement by after light-dividing device 4 with laser, enters laser receiver 2 by target 6 reflection and processes; S5, laser receiver 2 extract the signal of two bundle laser and are sent to signal element 3, the phase information of being carried by central processing unit 5 analyzing and processing calibration laser and measurement laser; The phase information that S6, central processing unit 5 obtain according to above-mentioned steps 5 analysis, by the drive singal of control signal unit 3, calibrates system initial phase.
Contrast prior art, novel phase type laser range finder of the present invention utilizes electric control optical switch to carry out Time-sharing control to calibration laser and measurement laser, reaches the effect by two bundle laser isolation and rapid translating, thus has the following advantages:
1) calibration laser and measurement laser share laser beam emitting device 1 and laser receiver 2, thus ensure splendid system temperature characteristic;
2) photoswitch of light-dividing device 4 adopts automatically controlled mode to control, and without any mechanical movement means, precision is accurate, and long service life, has fabulous degree of stability when ensureing that this stadimeter runs simultaneously;
3) stadimeter structure of the present invention is simple, easy to maintenance, production cost is low, has high cost performance, is convenient to promote.
Above concrete structure and dimensional data illustrate preferred embodiment of the present invention, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent distortion or replacement are all included in the application's claim limited range.
Claims (6)
1. a novel phase type laser range finder, is characterized in that, comprising:
Laser beam emitting device, for Emission Lasers;
Laser receiver, for receiving calibration laser and measurement laser, and is sent to signal element the signal extracted;
Signal element, for providing the drive singal of Laser emission, receives the signal that laser receiver provides simultaneously;
Light-dividing device, laser beam for being launched by laser beam emitting device is divided into calibration laser and measurement laser, described light-dividing device is provided with the first electric control optical switch and the second electric control optical switch, calibration is with laser by directive laser receiver direct after the first electric control optical switch, and measurement is reflected to laser receiver through target after passing through the second electric control optical switch with laser;
Central processing unit, described central processing unit connects the first electric control optical switch, the second electric control optical switch and signal element respectively, and central processing unit is used for analyzing the signal of signal element, controls two electric control optical switch timesharing simultaneously and opens.
2. the novel phase type laser range finder of one according to claim 1, is characterized in that: described first electric control optical switch and the second electric control optical switch are liquid crystal board.
3. the novel phase type laser range finder of one according to claim 2, is characterized in that: described first electric control optical switch and the second electric control optical switch are the high permeability liquid crystal board of TN type high speed.
4. the novel phase type laser range finder of one according to claim 1, is characterized in that: described laser receiver is avalanche diode.
5. the novel phase type laser range finder of one according to claim 1, it is characterized in that: be provided with signal amplifier in described signal element, the signal that described laser receiver provides enters in signal element after signal amplifier.
6., based on a phase alignment for the novel phase type laser range finder described in claim 1 to 5, it is characterized in that, comprise the following steps:
S1, laser beam emitting device Emission Lasers bundle are in light-dividing device;
The laser beam that laser beam emitting device is launched is divided into a drive test amount laser by S2, light-dividing device, a road calibration laser;
S3, central processing unit send steering order, make the first electric control optical switch conducting, the second electric control optical switch cut-off, and calibration laser enters laser receiver by light-dividing device and processes;
S4, central processing unit send steering order, make the first electric control optical switch cut-off, the second electric control optical switch conducting, and measurement by after light-dividing device with laser, enters laser receiver by target reflection and processes;
S5, laser receiver extract the signal of two bundle laser and are sent to signal element, the phase information of being carried by central processing unit analyzing and processing calibration laser and measurement laser;
The phase information that S6, central processing unit obtain according to above-mentioned steps 5 analysis, by the drive singal of control signal unit, calibrates system initial phase.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510657441.3A CN105301597A (en) | 2015-10-13 | 2015-10-13 | Novel phase type laser range finder and phase calibration method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510657441.3A CN105301597A (en) | 2015-10-13 | 2015-10-13 | Novel phase type laser range finder and phase calibration method thereof |
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| CN105301597A true CN105301597A (en) | 2016-02-03 |
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| CN201510657441.3A Pending CN105301597A (en) | 2015-10-13 | 2015-10-13 | Novel phase type laser range finder and phase calibration method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249246A (en) * | 2016-07-21 | 2016-12-21 | 湖南拓视觉信息技术有限公司 | Distance-finding method and device, measuring circuit |
| CN107246902A (en) * | 2017-07-05 | 2017-10-13 | 歌尔股份有限公司 | The method for detecting liquid level and system of a kind of 3D printing fluent material |
| CN115079133A (en) * | 2022-06-14 | 2022-09-20 | 韩晓霞 | Calibration range finder based on laser ranging technology and operation method thereof |
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| US6433860B1 (en) * | 1999-11-17 | 2002-08-13 | Kabushiki Kaisha Topcon | Light wave rangefinder |
| CN101762809A (en) * | 2009-12-29 | 2010-06-30 | 广州北才光电科技有限公司 | Calibration method based on liquid crystal light valve principle phase position measurement, calibration device and distance measuring device |
| CN104865577A (en) * | 2015-05-25 | 2015-08-26 | 上海翌森信息科技有限公司 | Laser range finding system |
| CN104897056A (en) * | 2015-03-13 | 2015-09-09 | 中国科学院光电研究院 | Synchronous data acquisition and communication circuit |
| CN205139368U (en) * | 2015-10-13 | 2016-04-06 | 深圳市迈测科技股份有限公司 | Novel phase type laser distance -measurement appearance |
-
2015
- 2015-10-13 CN CN201510657441.3A patent/CN105301597A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6433860B1 (en) * | 1999-11-17 | 2002-08-13 | Kabushiki Kaisha Topcon | Light wave rangefinder |
| CN101762809A (en) * | 2009-12-29 | 2010-06-30 | 广州北才光电科技有限公司 | Calibration method based on liquid crystal light valve principle phase position measurement, calibration device and distance measuring device |
| CN104897056A (en) * | 2015-03-13 | 2015-09-09 | 中国科学院光电研究院 | Synchronous data acquisition and communication circuit |
| CN104865577A (en) * | 2015-05-25 | 2015-08-26 | 上海翌森信息科技有限公司 | Laser range finding system |
| CN205139368U (en) * | 2015-10-13 | 2016-04-06 | 深圳市迈测科技股份有限公司 | Novel phase type laser distance -measurement appearance |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249246A (en) * | 2016-07-21 | 2016-12-21 | 湖南拓视觉信息技术有限公司 | Distance-finding method and device, measuring circuit |
| CN106249246B (en) * | 2016-07-21 | 2018-12-21 | 湖南拓视觉信息技术有限公司 | Distance measuring method and device, measuring circuit |
| CN107246902A (en) * | 2017-07-05 | 2017-10-13 | 歌尔股份有限公司 | The method for detecting liquid level and system of a kind of 3D printing fluent material |
| CN115079133A (en) * | 2022-06-14 | 2022-09-20 | 韩晓霞 | Calibration range finder based on laser ranging technology and operation method thereof |
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Application publication date: 20160203 |