CN108594266B - Laser radar and laser radar wind measuring system - Google Patents
Laser radar and laser radar wind measuring system Download PDFInfo
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- CN108594266B CN108594266B CN201810873695.2A CN201810873695A CN108594266B CN 108594266 B CN108594266 B CN 108594266B CN 201810873695 A CN201810873695 A CN 201810873695A CN 108594266 B CN108594266 B CN 108594266B
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- 230000003287 optical effect Effects 0.000 claims abstract description 243
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 238000012545 processing Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000004891 communication Methods 0.000 claims description 16
- 239000011521 glass Substances 0.000 claims description 4
- 239000005427 atmospheric aerosol Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000001228 spectrum Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/95—Lidar systems specially adapted for specific applications for meteorological use
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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
- G01S7/481—Constructional features, e.g. arrangements of optical elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The embodiment of the application provides a laser radar and a laser radar wind measurement system. The power supply control board and the laser light source are arranged on the bottom plate, the photoelectric converter is arranged on the top plate, and the laser light source, the optical splitter, the laser amplifier, the optical circulator, the laser transmitting and receiving device, the optical attenuator and the optical coupler are respectively connected with corresponding connection interfaces on the mounting plate. And the detection of the detection target is realized by a laser light source, an optical splitter, a laser amplifier, an optical circulator, a laser transmitting and receiving device, an optical attenuator, an optical coupler, a photoelectric converter and a data acquisition and processing device. The laser light source has the advantages of compact and light structure, easiness in transportation and installation, low maintenance cost, capability of reducing detection noise, capability of increasing the selectivity of the laser light source and effective reduction of cost.
Description
Technical Field
The application relates to the field of radar detection, in particular to a laser radar and a laser radar wind measuring system.
Background
The current laser wind-finding radar has larger detection noise, higher power requirement on a laser light source, complex structure and further increased cost.
Content of the application
In order to overcome the defects in the prior art, the purpose of the application is to provide a laser radar and a laser radar wind measuring system, which are compact and light in structure, easy to transport and install, low in maintenance cost, capable of reducing detection noise, and capable of increasing the selectivity of a laser light source and effectively reducing cost.
In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:
in a first aspect, embodiments of the present application provide a lidar, where the lidar includes a cover and a lidar structure disposed in the cover, where the cover is covered by the lidar structure.
The laser radar structure comprises a bottom plate, a mounting structure, a power supply control board, a laser light source, an optical splitter, a laser amplifier, an optical circulator, a laser transmitting and receiving device, an optical attenuator, an optical coupler, a photoelectric converter and a data acquisition and processing device.
The mounting structure comprises a first side plate, a second side plate, a mounting plate and a top plate, wherein the first side plate and the second side plate are oppositely arranged on the bottom plate, the top plate is fixedly connected with the first side plate and the second side plate respectively, and the mounting plate is arranged on the top plate and comprises a plurality of connecting interfaces.
The power supply control board and the laser light source are arranged on the bottom plate, the laser light source, the optical splitter, the laser amplifier, the optical circulator, the laser transmitting and receiving device, the optical attenuator and the optical coupler are respectively connected with corresponding connection interfaces on the mounting plate, and the photoelectric converter is arranged on the top plate.
The laser light source is electrically connected with the power supply control board and used for generating continuous laser signals, the optical splitter is connected with the laser light source and used for splitting the generated continuous laser signals into first laser signals and second laser signals, the laser amplifier is electrically connected with the optical splitter and used for amplifying the first laser signals to obtain first laser signals after amplifying power, the optical circulator is connected with the laser amplifier and used for outputting the first laser signals in a first preset direction, and the laser emission receiving device is connected with the optical circulator and used for emitting the first laser signals in different directions to detection targets so that atmospheric aerosol particles around the detection targets generate echo optical signals for the first laser signals and receive the echo optical signals and is further used for outputting the echo optical signals in a second preset direction.
The optical attenuator is electrically connected with the optical splitter, and is used for adjusting the optical power of the second laser signal to be the optical power matched with the optical power of the echo optical signal, the optical coupler is respectively connected with the optical attenuator and the optical circulator, and is used for optically coupling the second laser signal output by the optical attenuator and the echo optical signal output by the optical circulator after the optical power adjustment to obtain a mixed signal, the photoelectric converter is connected with the optical coupler, and is used for converting the mixed signal into an electric signal, and the data acquisition processing device and the photoelectric converter are electrically used for acquiring and processing the electric signal.
Optionally, the data acquisition and processing device includes:
and the data acquisition plate is arranged on the first side plate. And
And the processing device is arranged on the bottom plate and is electrically connected with the data acquisition plate.
Optionally, the laser radar further comprises:
and the optical isolator is connected between the laser light source and the optical splitter and used for blocking the return of the echo optical signal to the laser light source.
Optionally, the laser emission receiving device includes a switch, optical antennas connected to the switch and each emitting direction, and a window mirror disposed corresponding to the optical antennas, where the switch is used to control the emitting direction of the first laser signal, so that the first laser signal is emitted to the detection target via the optical antenna in the corresponding direction and via the window mirror.
Optionally, the mounting plates include two, a first mounting plate and a second mounting plate, respectively.
The first mounting plate and the second mounting plate are oppositely arranged on the top plate, an optical isolator inlet, a laser amplifier inlet, an optical attenuator inlet and an optical attenuator outlet are sequentially arranged on one side of the first mounting plate, which faces the second mounting plate, and an optical beam splitter inlet, an optical beam splitter first outlet, an optical beam splitter second outlet and an optical coupler first inlet are sequentially arranged on one side of the first mounting plate, which is far away from the second mounting plate.
The second mounting plate is provided with an optical isolator inlet, an optical circulator outlet and an echo light outlet correspondingly towards one side of the first mounting plate, and a laser light source light outlet, a laser amplifier outlet, a switching optical switch inlet and an optical coupler second inlet correspondingly are arranged on one side of the second mounting plate away from the first mounting plate.
The laser light source with the laser light source light outlet is connected, the optical isolator respectively with optical isolator entry with optical isolator exit linkage, the optical beam splitter respectively with optical beam splitter first export and optical beam splitter second exit linkage, the laser amplifier respectively with laser amplifier entry with laser amplifier exit linkage, the optical circulator respectively with optical circulator entry with optical circulator exit linkage, the optical switch with optical switch entry linkage, the optical coupler with optical coupler first entry with optical coupler second entry linkage, the optical attenuator with optical attenuator entry with optical attenuator exit linkage.
Optionally, the window mirror is an infrared light-transmitting glass, and an infrared antireflection film and a waterproof film are plated on the infrared light-transmitting glass.
Optionally, a lightning protection device is further arranged on the second side plate.
Optionally, a temperature control device and a heating device are further arranged on one side, close to the bottom plate, of the top plate, the temperature control device is electrically connected with the heating device and used for adjusting the heating temperature of the heating device, and the heating device heats the top plate according to the heating temperature.
Optionally, the laser radar further comprises a power supply and a communication device, the base plate is further provided with a power supply connection interface and a communication interface, the power supply is connected with the power supply connection interface, and the communication device is connected with the communication interface.
In a second aspect, an embodiment of the present application further provides a laser radar wind measurement system, where the laser radar wind measurement system includes a server and the above laser radar communicatively connected to the server.
Compared with the prior art, the application has the following beneficial effects:
the embodiment of the application provides a laser radar and a laser radar wind measurement system. The power supply control board and the laser light source are arranged on the bottom plate, the photoelectric converter is arranged on the top plate, and the laser light source, the optical splitter, the laser amplifier, the optical circulator, the laser transmitting and receiving device, the optical attenuator and the optical coupler are respectively connected with corresponding connection interfaces on the mounting plate. And the detection of the detection target is realized by a laser light source, an optical splitter, a laser amplifier, an optical circulator, a laser transmitting and receiving device, an optical attenuator, an optical coupler, a photoelectric converter and a data acquisition and processing device. The laser light source has the advantages of compact and light structure, easiness in transportation and installation, low maintenance cost, capability of reducing detection noise, capability of increasing the selectivity of the laser light source and effective reduction of cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting in scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a lidar according to an embodiment of the present application;
FIG. 2 is one of the block diagrams of the lidar according to the embodiment of the present application;
FIG. 3 is a second block diagram of a lidar according to an embodiment of the present application;
fig. 4 is a block diagram of the structure of the laser transmitting and receiving device shown in fig. 3;
fig. 5 is a schematic view of the structure of the laser transmitting and receiving device shown in fig. 3;
fig. 6 is a schematic structural diagram of a lidar structure according to an embodiment of the present application;
FIG. 7 is an enlarged schematic view of section I shown in FIG. 6;
fig. 8 is a schematic structural diagram of a base plate according to an embodiment of the present disclosure;
fig. 9 is a second schematic structural diagram of a lidar structure according to an embodiment of the present application.
Icon: 10-laser radar; 100-a cover body; 200-laser radar structure; 210-a bottom plate; 211-a power supply control board; 212-a laser light source; 213-a laser amplifier; 214-a power connection interface; 215-a communication interface; 216-reinforcing ribs; 217-supporting the anchor mount; 220-a first side plate; 230-a second side plate; 240-mounting plate; 242-a first mounting plate; 2421-an optical isolator inlet; 2422-a laser amplifier inlet; 2423-an optical attenuator inlet; 2424-an optical attenuator outlet; 2425-a beamsplitter inlet; 2426-a first outlet of a beam splitter; 2427-a second outlet of the beam splitter; 2428-an optocoupler first inlet; 244-a second mounting plate; 2441-an optical isolator inlet; 2442-optical circulator inlet; 2443-optical circulator outlet; 2444-echo light outlet; 2445-a laser light source light outlet; 2446-laser amplifier outlet; 2447-switching the optical switch inlet; 2448-an optocoupler second inlet; 250-top plate; 251-optical isolator; 252-optical splitters; 253-light circulator; 254-optical attenuator; 255-optocoupler; 256-photoelectric converter; 260-a laser transmitting and receiving device; 262-switching the optical switch; 264-an optical antenna; 265-an antenna securing assembly; 266-window mirror; 270-a data acquisition and processing device; 272-a data acquisition board; 274-a processing device; 280-a lightning protection device; 291-temperature control device; 292-heating device.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that some terms indicating an orientation or a positional relationship are based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship conventionally put in use of the product of the application, are merely for convenience of description of the present application and for simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, a schematic diagram of a laser radar 10 according to an embodiment of the present application is shown. In this embodiment, the lidar 10 includes a cover 100 and a lidar structure 200 disposed in the cover 100, and the cover 100 is covered on the lidar structure 200.
Referring to fig. 1 and 2 in combination, the lidar structure 200 may include a chassis 210, a mounting structure, a power supply control board 211, a laser light source 212, an optical splitter 252, a laser amplifier 213, an optical circulator 253, a laser transmitting and receiving device 260, an optical attenuator 254, an optical coupler 255, an optical-to-electrical converter 256, and a data acquisition and processing device 270.
Referring to fig. 1, the mounting structure includes a first side plate 220, a second side plate 230, a mounting plate 240, and a top plate 250, wherein the first side plate 220 and the second side plate 230 are oppositely disposed on the bottom plate 210, the top plate 250 is fixedly connected with the first side plate 220 and the second side plate 230, and the mounting plate 240 is disposed on the top plate 250 and includes a plurality of connection interfaces.
The power control board 211 and the laser light source 212 are disposed on the base plate 210, the laser light source 212, the optical splitter 252, the laser amplifier 213, the optical circulator 253, the laser transmitting and receiving device 260, the optical attenuator 254 and the optical coupler 255 are respectively connected with corresponding connection interfaces on the mounting plate 240, and the photoelectric converter 256 is disposed on the top plate 250.
Referring to fig. 2, the laser light source 212 is electrically connected to the power control board 211 for generating a continuous laser signal. The optical splitter 252 is connected to the laser light source 212 for splitting the generated continuous laser signal into a first laser signal and a second laser signal. The laser amplifier 213 is electrically connected to the optical splitter 252, and is configured to perform laser amplification on the first laser signal to obtain a first laser signal with amplified power. The optical circulator 253 is connected to the laser amplifier 213 for outputting the first laser signal in a first predetermined direction. The laser transmitting and receiving device 260 is connected to the optical circulator 253, and is configured to transmit the first laser signal to a detection target in different directions, so that the first laser signal is generated by the atmospheric aerosol particles around the detection target, and the echo optical signal is received. The optical circulator 253 is further configured to output the echo optical signal in a second predetermined direction.
The optical attenuator 254 is electrically connected to the optical splitter 252, and is configured to adjust the optical power of the second laser signal to an optical power that matches the optical power of the echo optical signal. The optical coupler 255 is connected to the optical attenuator 254 and the optical circulator 253, and is configured to optically couple the second laser signal output by the optical attenuator 254 and having the optical power adjusted with the echo optical signal output by the optical circulator 253 to obtain a mixed signal. The photoelectric converter 256 is connected to the optical coupler 255 and is configured to convert the mixed signal into an electrical signal, and the data collecting and processing device 270 is electrically connected to the photoelectric converter 256 and is configured to collect and process the electrical signal.
It should be noted that the detection target may be a wind field, an airport, an environmental climate, or the like, and is not particularly limited herein.
Based on the above design, the laser radar 10 provided in this embodiment is compact and portable, easy to transport and install, and low in maintenance cost, and can reduce detection noise by adding the optical attenuator 254 to adjust the optical power of the local oscillator light to match the optical power of the echo optical signal returned by detection, and meanwhile, by adding the optical amplifier and the optical attenuator 254, the stability of the laser is ensured, the selectivity of the laser light source 212 is increased, and the cost is effectively reduced.
Optionally, referring to fig. 3, the lidar 10 may further include an optical isolator 251, where the optical isolator 251 is connected between the laser light source 212 and the optical splitter 252, and is configured to block the return of the echo optical signal to the laser light source 212. Therefore, the isolation of the optical isolator 251 ensures that the optical path is transmitted along one direction, reduces the return of the echo optical signal to the laser light source 212, ensures the stability of the laser light source 212, and reduces the system noise.
Optionally, referring to fig. 4 and fig. 5 in combination, the laser transmitting and receiving device 260 may include a switch 262, an optical antenna 264 connected to the switch 262 and having respective transmitting directions, and a window mirror 266 corresponding to the optical antenna 264, where the switch 262 is configured to control the transmitting direction of the first laser signal, so that the first laser signal is transmitted to the detection target via the optical antenna 264 having the corresponding direction and via the window mirror 266.
Referring to fig. 5, in this embodiment, the laser transmitting and receiving device 260 may further include an antenna fixing component 265 for fixing the optical antennas 264 in each transmitting direction, each optical antenna 264 is fixed on the antenna fixing component 265, where a through hole is disposed on the antenna fixing component 265, and the window mirror 266 is fixed in the through hole, so that the transmitting direction of each optical antenna 264 is aligned with the window mirror 266.
The optical switch 262 may be used to complete optical path switching, and in order to ensure the switching speed, the optical switch 262 may use a high-speed optical switch 262 to make the switching speed within 1 ms.
Alternatively, the optical antennas 264 may use focusing mirrors or scanning mirrors, so that the detection range is wider, and the number of the optical antennas 264 may be matched according to the requirements of actual detection points, which is not limited in particular herein.
Optionally, the window mirror 266 may be an infrared light-transmitting glass, on which an infrared anti-reflection film and a waterproof film are coated, through which the transmittance of infrared light can be increased, so that the light path transmission is facilitated, and meanwhile, dust can be prevented from adhering to the window mirror 266 through the waterproof film, thereby affecting the light path transmission.
Optionally, referring to fig. 6 in combination, the data acquisition and processing device 270 may include a data acquisition board 272 and a processing device 274, where the data acquisition board 272 is disposed on the first side board 220, and the processing device 274 is disposed on the bottom board 210 and electrically connected to the data acquisition board 272. In detail, the data acquisition board 272 is configured to acquire the electrical signal converted by the photoelectric converter 256, perform signal processing on the electrical signal to obtain an accumulated spectrum signal, and send the accumulated spectrum signal to the processing device 274. The processing device 274 calculates three-dimensional wind field distribution information of the detection target based on the accumulated spectrum signals.
Alternatively, the processing device 274 may be an fpga+industrial control computer in the prior art, or a combination of an fpga+singlechip or an fpga+dsp, which is not limited herein.
Optionally, a lightning protection device 280 may be further disposed on the second side plate 230, and when the lightning protection device 280 works normally, the switching element is turned off, and when a lightning stroke wave comes, the switching element is turned on to discharge the surge current to the ground, so that the laser radar 10 is protected from being damaged by the surge impact.
Still referring to fig. 6, in one embodiment, the mounting plate 240 may include two first and second mounting plates 242, 244, respectively, with the first and second mounting plates 242, 244 being disposed opposite the top plate 250.
As shown in fig. 7, an optical isolator inlet 2421, a laser amplifier inlet 2422, an optical attenuator inlet 2423, and an optical attenuator outlet 2424 are sequentially disposed on a side of the first mounting plate 242 facing the second mounting plate 244, and an optical splitter inlet 2425, an optical splitter first outlet 2426, an optical splitter second outlet 2427, and an optical coupler first inlet 2428 are sequentially disposed on a side of the first mounting plate 242 facing away from the second mounting plate 244. An optical isolator inlet 2441, an optical circulator inlet 2442, an optical circulator outlet 2443 and an echo light outlet 2444 are correspondingly arranged on one side of the second mounting plate 244 facing the first mounting plate 242, and a laser light source light outlet 2445, a laser amplifier outlet 2446, a switching optical switch inlet 2447 and an optical coupler second inlet 2448 are correspondingly arranged on one side of the second mounting plate 244 far away from the first mounting plate 242.
In this embodiment, the laser light source 212 is connected to the laser light source light outlet 2445, the optical isolator is connected to the optical isolator inlet and the optical isolator outlet, the optical splitter is connected to the optical splitter, the optical splitter first outlet 2426 and the optical splitter second outlet 2427, the laser amplifier 213 is connected to the laser amplifier inlet 2422 and the laser amplifier outlet 2446, the optical circulator 253 is connected to the optical circulator inlet 2442 and the optical circulator outlet 2443, the optical switch is connected to the optical switch inlet, the optical coupler 255 is connected to the optical coupler first inlet 2428 and the optical coupler second inlet 2448, and the optical attenuator 254 is connected to the optical attenuator inlet 2423 and the optical attenuator outlet 2424.
Based on the above design, the connection between the optical fiber devices can be realized through the interfaces on the first mounting plate 242 and the second mounting plate 244, so that the overall structure is more compact and light, the transportation and the installation are easy, and the maintenance cost is low.
Optionally, referring to fig. 8, the lidar 10 may further include a power supply and a communication device (not shown in the drawing), and a power supply connection interface 214 and a communication interface 215 may be further disposed on the base plate 210, where the power supply is connected to the power supply connection interface 214, and the communication device is connected to the communication interface.
Still referring to fig. 8, optionally, the base plate 210 may further be provided with a reinforcing rib 216 and a supporting fixing base 217, where the strength of the base plate 210 may be enhanced by providing the reinforcing rib 216, and the laser radar 10 may be fixed to an external structure by providing the supporting fixing base 217.
Optionally, referring to fig. 9, a temperature control device 291 and a heating device 292 may be further disposed on a side of the top plate 250 near the bottom plate 210, where the temperature control device 291 is electrically connected to the heating device 292 and is used for adjusting a heating temperature of the heating device 292, and the heating device 292 heats the top plate 250 according to the heating temperature, so that a temperature of the laser radar 10 may meet a working temperature requirement.
Further, the embodiment of the application also provides a laser radar wind measuring system, which comprises a server and the laser radar 10 which is in communication connection with the server.
In summary, the laser radar and the laser radar wind measurement system provided in the embodiments of the present application. The power supply control board and the laser light source are arranged on the bottom plate, the photoelectric converter is arranged on the top plate, and the laser light source, the optical splitter, the laser amplifier, the optical circulator, the laser transmitting and receiving device, the optical attenuator and the optical coupler are respectively connected with corresponding connection interfaces on the mounting plate. And the detection of the detection target is realized by a laser light source, an optical splitter, a laser amplifier, an optical circulator, a laser transmitting and receiving device, an optical attenuator, an optical coupler, a photoelectric converter and a data acquisition and processing device. The laser light source has the advantages of compact and light structure, easiness in transportation and installation, low maintenance cost, capability of reducing detection noise, capability of increasing the selectivity of the laser light source and effective reduction of cost.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The laser radar is characterized by comprising a cover body and a laser radar structure arranged in the cover body, wherein the cover body covers the laser radar structure;
the laser radar structure comprises a bottom plate, a mounting structure, a power supply control board, a laser light source, an optical divider, a laser amplifier, an optical circulator, a laser transmitting and receiving device, an optical attenuator, an optical coupler, a photoelectric converter and a data acquisition and processing device;
the mounting structure comprises a first side plate, a second side plate, a mounting plate and a top plate, wherein the first side plate and the second side plate are oppositely arranged on the bottom plate, the top plate is fixedly connected with the first side plate and the second side plate respectively, and the mounting plate is arranged on the top plate and comprises a plurality of connecting interfaces;
the power supply control board and the laser light source are arranged on the bottom plate, the laser light source, the optical splitter, the laser amplifier, the optical circulator, the laser transmitting and receiving device, the optical attenuator and the optical coupler are respectively connected with corresponding connection interfaces on the mounting plate, and the photoelectric converter is arranged on the top plate;
the laser light source is electrically connected with the power supply control board and used for generating continuous laser signals, the optical splitter is connected with the laser light source and used for splitting the generated continuous laser signals into first laser signals and second laser signals, the laser amplifier is electrically connected with the optical splitter and used for amplifying the first laser signals to obtain amplified first laser signals, the optical circulator is connected with the laser amplifier and used for outputting the first laser signals along a first preset direction, and the laser emission receiving device is connected with the optical circulator and used for emitting the first laser signals along different directions to detection targets so that atmospheric aerosol particles around the detection targets generate echo optical signals for the first laser signals and receive the echo optical signals and is also used for outputting the echo optical signals along a second preset direction;
the optical attenuator is electrically connected with the optical splitter and is used for adjusting the optical power of the second laser signal to be the optical power matched with the optical power of the echo optical signal, the optical coupler is respectively connected with the optical attenuator and the optical circulator and is used for optically coupling the second laser signal output by the optical attenuator and the echo optical signal output by the optical circulator after the optical power adjustment to obtain a mixed signal, the photoelectric converter is connected with the optical coupler and is used for converting the mixed signal into an electric signal, and the data acquisition processing device and the photoelectric converter are electrically used for acquiring and processing the electric signal;
the data acquisition processing device comprises: the data acquisition plate is arranged on the first side plate; the processing device is arranged on the bottom plate and is electrically connected with the data acquisition plate;
the lidar further comprises: and the optical isolator is connected between the laser light source and the optical splitter and used for blocking the return of the echo optical signal to the laser light source.
2. The lidar according to claim 1, wherein the laser light emitting and receiving device comprises a switching optical switch for controlling the emitting direction of the first laser signal so that the first laser signal is emitted toward the detection target via the optical antenna of the corresponding direction and via the window mirror, an optical antenna of each emitting direction connected to the switching optical switch, and a window mirror provided corresponding to the optical antenna.
3. The lidar of claim 2, wherein the mounting plate comprises two, a first mounting plate and a second mounting plate;
the first mounting plate and the second mounting plate are oppositely arranged on the top plate, an optical isolator inlet, a laser amplifier inlet, an optical attenuator inlet and an optical attenuator outlet are sequentially arranged on one side of the first mounting plate, which faces the second mounting plate, and an optical beam splitter inlet, an optical beam splitter first outlet, an optical beam splitter second outlet and an optical coupler first inlet are sequentially arranged on one side of the first mounting plate, which is far away from the second mounting plate;
an optical isolator inlet, an optical circulator outlet and an echo light outlet are correspondingly arranged on one side, facing the first mounting plate, of the second mounting plate, and a laser light source light outlet, a laser amplifier outlet, a switching optical switch inlet and an optical coupler second inlet are correspondingly arranged on one side, far away from the first mounting plate, of the second mounting plate;
the laser light source with the laser light source light outlet is connected, the optical isolator respectively with optical isolator entry with optical isolator exit linkage, the optical beam splitter respectively with optical beam splitter first export and optical beam splitter second exit linkage, the laser amplifier respectively with laser amplifier entry with laser amplifier exit linkage, the optical circulator respectively with optical circulator entry with optical circulator exit linkage, the optical switch with optical switch entry linkage, the optical coupler with optical coupler first entry with optical coupler second entry linkage, the optical attenuator with optical attenuator entry with optical attenuator exit linkage.
4. The lidar of claim 2, wherein the window mirror is an infrared transparent glass coated with an infrared anti-reflection film and a waterproof film.
5. The lidar of claim 1, wherein the second side plate is further provided with a lightning protection device.
6. The lidar of claim 1, wherein a temperature control device and a heating device are further arranged on one side of the top plate, which is close to the bottom plate, and the temperature control device is electrically connected with the heating device and is used for adjusting the heating temperature of the heating device, and the heating device heats the top plate according to the heating temperature.
7. The lidar of claim 1, further comprising a power supply and a communication device, wherein the backplane is further provided with a power supply connection interface and a communication interface, wherein the power supply is connected to the power supply connection interface, and wherein the communication device is connected to the communication interface.
8. A laser radar anemometry system comprising a server and the laser radar of any one of claims 1-7 in communication with the server.
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| CN113138376B (en) * | 2021-05-21 | 2023-09-22 | 中国科学院长春光学精密机械与物理研究所 | Device for thermo-optical automatic correction of laser radar |
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