CN108572360A - A kind of reception device of multi-wavelength laser radar - Google Patents
A kind of reception device of multi-wavelength laser radar Download PDFInfo
- Publication number
- CN108572360A CN108572360A CN201810395293.6A CN201810395293A CN108572360A CN 108572360 A CN108572360 A CN 108572360A CN 201810395293 A CN201810395293 A CN 201810395293A CN 108572360 A CN108572360 A CN 108572360A
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- laser
- wavelength
- signal
- laser radar
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Classifications
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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
- G01S7/487—Extracting wanted echo signals, e.g. pulse detection
Abstract
The invention discloses a kind of reception devices of multi-wavelength laser radar, belong to laser radar field.The device is matched with multi-wavelength laser radar, and multi-wavelength laser radar includes collimator, grating, wavelength division multiplexer, multiple-wavelength laser, optical beam-splitter, circulator, photodetector, data collecting card and computer.Laser signal transmitting problem conllinear with the light path received is realized using grating and collimator, substantially increases the detectivity of laser radar and the accuracy of result of detection.Relative to traditional reception device, simple, compact, the easy calibration of the apparatus structure, stability are good.
Description
Technical field
The invention discloses a kind of reception devices of multi-wavelength laser radar, belong to laser radar field.
Background technology
The application of laser radar is very extensive, is related to multiple ambits, no matter militarily or on civilian all
Have broad application prospects.In military aspect：Laser radar can be used for the guidance of cruise missile and navigation, range-measurement system, be used for
Low flying target tracking measurement, the measurement for target flight posture, detecting chemistry, biological warfare agent and Underwater Navigation and communication etc. with
1 mendelevium.At civilian aspect：The dangerous situation that laser radar can be used in atmospheric remote sensing and aeromerric moasurenont, measurement atmospheric ozone, industrial production
Forecast, mapping and the fields such as geodesic survey, collision prevention of vehicle, robot vision, non-destructive testing and medical diagnosis.Laser radar technique
The research to attract people's attention and application achievements are achieved.
Laser radar mainly by laser pulse emission system, echo signal receive system and subsequent digital signal acquisition with
Manage imaging system three parts composition.Reception system is to receive the extremely weak laser pulse returned by target diffusing reflection, it is turned
It is changed to electric impulse signal and is amplified.Reception system determines the detectivity of laser radar and the accuracy of result of detection.
Invention content
It is an object of the invention to devise a kind of reception device of multi-wavelength laser radar, by the device realize for
The detectivity and result of detection of laser radar are promoted.
To achieve the above object, the technical solution adopted by the present invention is a kind of reception device of multi-wavelength laser radar, should
Device is matched with multi-wavelength laser radar, and multi-wavelength laser radar includes multiple-wavelength laser (1), optical beam-splitter (2),
Circulator (3), optical splitter (4), wavelength division multiplexer (5), photodetector (6), data collecting card (7) and computer (8).More waves
The laser that long laser (1) is projected is divided into two bundles by optical beam-splitter (2), a branch of that local oscillator, another beam is used as to enter circulator
(3) 1 mouthful, from 2 mouthfuls of outgoing of circulator (3), 2 mouthfuls of circulator (3) are connected with optical splitter (4), and multiwavelength laser, which utilizes, to be divided
The light splitting of light device (4) acts on, and five wavelength emit laser to object to be measured simultaneously respectively, are reflected and are scattered according to object to be measured
The signal returned again passes by optical splitter and utilizes light path principle, and by the sharp combiner of five wavelength, echo-signal is by annular
3 mouthfuls of device (3) enter dense wave division multiplexer (5) and are split, and the light of five wavelength carries out beat frequency with local oscillator light respectively, by
The conversion that photodetector (6) realizes photosignal is crossed, electric signal enters in data collecting card (7), in data collecting card (7)
Data handled by computer (8), by calculating the multi-wavelength signals laser that is reflected back of object to be measured and local more waves
Time difference between long laser draws out the 3-D view containing information on target object.
The reception device includes collimator (9) and grating (10), is sent out after collimator (9) to object to be measured transmitting laser
It is mapped on grating (10), grating (10) detaches the laser of different wave length, and the different wave length laser after separation is respectively to waiting for
Objective emission is surveyed, object to be measured is reflected emitting the laser signal come, and reflected echo-signal is reversible according to light path
Principle returns to the transmitting of the echo-signal original road of different wave length on grating (10), grating (10) and reflects these echo-signals
On to circulator (3) and enter dense wave division multiplexer (4), finally reaches photoelectric converter (6) and convert optical signals to telecommunications
Number.
Multiple-wavelength laser (1) is solid state laser, semiconductor laser, optical fiber laser, gas laser or Raman
Laser.
The wave-length coverage of multiple-wavelength laser (1) can be from ultraviolet to infrared.
The emitted telescope of laser signal of multiple-wavelength laser (1) expands and compresses homed on its target, optical beam-splitter (2)
The laser echo signal for the different wave length that laser radar is collected into is detached, and is input on photoelectric converter and carries out signal
Conversion is converted into digital signal finally by high-speed a/d and enters computer (8) progress signal processing.
Wherein, the Laser emission light path of laser radar and the light path of echo-signal essentially coincide, this signal transmitting and receiving
Conllinear design be ensure laser radar receive information correctness important indicator and light path adjustment in more complicated one
Item technical work can largely effect on the detectivity of laser radar and the accuracy of result of detection if adjustment is bad.
Description of the drawings
Fig. 1 is the General Principle block diagram of laser radar.
Fig. 2 is the schematic diagram of multi-wavelength laser radar.
Fig. 3 is the structural schematic diagram of receiving system.
In figure：1, multiple-wavelength laser, 2, optical beam-splitter, 3, circulator, 4, optical splitter, 5, wavelength division multiplexer, 6, light
Electric explorer, 7, data collecting card, 8, computer, 9, collimator, 10, grating.
Specific implementation mode
Fig. 1 is the General Principle block diagram of laser radar.Usual laser radar be by emission system, signal processing system and
Reception system composition.
The laser transmitting system being previously mentioned is made of laser and transmitter-telescope etc..The laser arteries and veins that laser is sent out
It rushes signal to send out by transmitter-telescope, signal transmits in an atmosphere, and acting on for the scattering that is subject to and decaying reaches object to be measured
And it is reflected.Wherein backward echo-signal will reflect back into laser radar, be received by the reception system of radar.Receiving system
Mainly there are the parts such as receiving telescope and opto-electronic conversion.Signal processing system is eventually arrived at, the processing and analysis of data are carried out, from
And obtain the parameter and information of object to be measured.
Fig. 2 show the schematic diagram of multi-wavelength laser radar.In figure, multi-wavelength laser radar includes：Multiple-wavelength laser
(1), optical beam-splitter (2), circulator (3), optical splitter (4), wavelength division multiplexer (5), photodetector (6), data collecting card
(7) it is formed with computer (8).
Selected multiple-wavelength laser (1) can be solid state laser, semiconductor laser in Fig. 2, can also be light
Fibre laser, gas laser or Ramar laser.The wave-length coverage of laser can be from ultraviolet to infrared.Laser signal is through hair
It penetrates telescope and expands and compress homed on its target, the laser echo signal for the different wave length that laser radar is collected by spectroscope carries out
Separation, and be input on photoelectric converter progress signal conversion grabs finally by high-speed a/d and changes digital signal into and enter computer
Carry out signal processing.
Fig. 3 is the structural schematic diagram of receiving system.Laser signal is emitted to grating (10) after collimator (9)
On, grating detaches the laser of different wave length, and the different wave length laser after separation emits to object to be measured respectively, mesh to be measured
It marks and reflects emitting the laser signal come, reflected echo-signal can be by different waves according to light path principle
Long echo-signal original road transmitting returns on grating, and 3 ports that these echo-signals are reflected into circulator (3) by grating again enter
Dense wave division multiplexer (4) finally reaches photoelectric converter (6) and converts optical signals to electric signal.
Wherein, the Laser emission light path of laser radar and the light path of echo-signal essentially coincide, this signal transmitting and receiving
Conllinear design be ensure laser radar receive information correctness important indicator and light path adjustment in more complicated one
Item technical work can largely effect on the detectivity of laser radar and the accuracy of result of detection if adjustment is bad.
Claims (4)
1. a kind of reception device of multi-wavelength laser radar, it is characterised in that：The device is matched with multi-wavelength laser radar,
Multi-wavelength laser radar includes multiple-wavelength laser (1), optical beam-splitter (2), circulator (3), optical splitter (4), wavelength-division multiplex
Device (5), photodetector (6), data collecting card (7) and computer (8)；The laser that multiple-wavelength laser (1) projects passes through light
Beam splitter (2) is learned to be divided into two bundles, it is a branch of that local oscillator, another beam is used as to enter 1 mouthful of circulator (3), go out from 2 mouthfuls of circulator (3)
It penetrates, 2 mouthfuls of circulator (3) are connected with optical splitter (4), and multiwavelength laser is acted on using the light splitting of optical splitter (4), five wavelength point
Laser is not emitted to object to be measured not simultaneously, again passing by optical splitter according to object to be measured reflection and back scattered signal utilizes light path
Principle of reversibility, by the sharp combiner of five wavelength, echo-signal enters dense wave division multiplexer (5) by 3 mouthfuls of circulator (3)
Be split, the light of five wavelength carries out beat frequency with local oscillator light respectively, after by photodetector (6) realize turning for photosignal
It changes, electric signal enters in data collecting card (7), and the data in data collecting card (7) are handled by computer (8), are passed through
The time difference between the multi-wavelength signals laser and local multiwavelength laser that object to be measured is reflected back is calculated, is drawn out containing target
The 3-D view of object information；
The reception device includes collimator (9) and grating (10), is emitted to after collimator (9) to object to be measured transmitting laser
On grating (10), grating (10) detaches the laser of different wave length, and the different wave length laser after separation is respectively to mesh to be measured
Mark transmitting, object to be measured are reflected emitting the laser signal come, reflected echo-signal, according to the reversible original of light path
Reason returns to the transmitting of the echo-signal original road of different wave length on grating (10), grating (10) and is reflected into these echo-signals
On circulator (3) and enter dense wave division multiplexer (4), finally reaches photoelectric converter (6) and convert optical signals to electric signal.
2. a kind of reception device of multi-wavelength laser radar according to claim 1, it is characterised in that：Multiple-wavelength laser
(1) it is solid state laser, semiconductor laser, optical fiber laser, gas laser or Ramar laser.
3. a kind of reception device of multi-wavelength laser radar according to claim 1, it is characterised in that：Multiple-wavelength laser
(1) wave-length coverage can be from ultraviolet to infrared.
4. a kind of reception device of multi-wavelength laser radar according to claim 1, it is characterised in that：Multiple-wavelength laser
(1) the emitted telescope of laser signal expands and compresses homed on its target, and laser radar is collected into not by optical beam-splitter (2)
The laser echo signal of co-wavelength is detached, and is input to progress signal conversion on photoelectric converter, finally by high-speed a/d
It is converted into digital signal and enters computer (8) progress signal processing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810395293.6A CN108572360A (en) | 2018-04-27 | 2018-04-27 | A kind of reception device of multi-wavelength laser radar |
| CN201910340887.1A CN109975790A (en) | 2018-04-27 | 2019-04-25 | A kind of reception device of multi-wavelength laser radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810395293.6A CN108572360A (en) | 2018-04-27 | 2018-04-27 | A kind of reception device of multi-wavelength laser radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108572360A true CN108572360A (en) | 2018-09-25 |
Family
ID=63575480
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810395293.6A Withdrawn CN108572360A (en) | 2018-04-27 | 2018-04-27 | A kind of reception device of multi-wavelength laser radar |
| CN201910340887.1A Pending CN109975790A (en) | 2018-04-27 | 2019-04-25 | A kind of reception device of multi-wavelength laser radar |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910340887.1A Pending CN109975790A (en) | 2018-04-27 | 2019-04-25 | A kind of reception device of multi-wavelength laser radar |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490905A (en) * | 2018-11-27 | 2019-03-19 | 苏州仓江行电子科技有限公司 | A kind of ozone monitoring laser radar transmission equipment device |
| CN110780281A (en) * | 2019-11-08 | 2020-02-11 | 吉林大学 | Optical phased array laser radar system |
| CN111983587A (en) * | 2020-08-31 | 2020-11-24 | 上海禾赛科技股份有限公司 | Laser radar, transmitting module, receiving module and detecting method thereof |
| CN113671212A (en) * | 2021-08-16 | 2021-11-19 | 南京牧镭激光科技有限公司 | Optical path switching channel and switching method for measuring three-dimensional air volume based on DWDM optical switch module, and laser radar |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111796297B (en) * | 2020-06-12 | 2022-12-09 | 电子科技大学 | Parallel frequency modulation continuous wave laser ranging device based on erbium glass laser |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526621B (en) * | 2009-02-16 | 2011-08-10 | 北京航空航天大学 | Fast multispectral remote sensing polarization imager |
| CN102253394B (en) * | 2011-04-21 | 2012-10-24 | 北京理工大学 | Multispectral stripe tube three-dimensional lidar imaging apparatus |
| CN103207395B (en) * | 2013-03-26 | 2014-10-08 | 南京理工大学 | Driving anti-collision radar device for automobile |
| KR102136401B1 (en) * | 2013-10-21 | 2020-07-21 | 한국전자통신연구원 | Multi-wave image lidar sensor apparatus and signal processing method thereof |
| CN107003411A (en) * | 2014-12-12 | 2017-08-01 | 三菱电机株式会社 | Laser radar apparatus |
| CN105911535B (en) * | 2016-06-12 | 2018-06-29 | 中国科学院上海技术物理研究所 | Wavelength-division multiplex detection system similar in a kind of laser radar multi-wavelength |
| CN107807367B (en) * | 2017-11-02 | 2019-04-12 | 南京牧镭激光科技有限公司 | A kind of coherent wind laser radar apparatus |
-
2018
- 2018-04-27 CN CN201810395293.6A patent/CN108572360A/en not_active Withdrawn
-
2019
- 2019-04-25 CN CN201910340887.1A patent/CN109975790A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490905A (en) * | 2018-11-27 | 2019-03-19 | 苏州仓江行电子科技有限公司 | A kind of ozone monitoring laser radar transmission equipment device |
| CN110780281A (en) * | 2019-11-08 | 2020-02-11 | 吉林大学 | Optical phased array laser radar system |
| CN111983587A (en) * | 2020-08-31 | 2020-11-24 | 上海禾赛科技股份有限公司 | Laser radar, transmitting module, receiving module and detecting method thereof |
| CN113671212A (en) * | 2021-08-16 | 2021-11-19 | 南京牧镭激光科技有限公司 | Optical path switching channel and switching method for measuring three-dimensional air volume based on DWDM optical switch module, and laser radar |
| CN113671212B (en) * | 2021-08-16 | 2022-07-15 | 南京牧镭激光科技有限公司 | Optical path switching channel and switching method for measuring three-dimensional air volume based on DWDM optical switch module, and laser radar |
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| Publication number | Publication date |
|---|---|
| CN109975790A (en) | 2019-07-05 |
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Application publication date: 20180925 |
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