CN107238843A - laser imaging control method and device - Google Patents
laser imaging control method and device Download PDFInfo
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- CN107238843A CN107238843A CN201710423918.0A CN201710423918A CN107238843A CN 107238843 A CN107238843 A CN 107238843A CN 201710423918 A CN201710423918 A CN 201710423918A CN 107238843 A CN107238843 A CN 107238843A
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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
- G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
-
- 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
- G01S7/484—Transmitters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
- G01S7/4861—Circuits for detection, sampling, integration or read-out
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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)
Abstract
Laser imaging control method proposed by the present invention and device, the temperature of light source can be accurately controlled, light source is set to reach the operating temperature of setting, the laser beam quality sent is more stable, it can switch simultaneously between direct detection and coherent detection, not only have fast in closely place's imaging, high resolution, the advantages of realizing simple, but also with the remote ability using coherent detection high sensitivity target range, need to obtain single-point operating distance as far as possible with practical application medium and long distance, acquisition target multicast range information is closely needed to be consistent beneficial to target identification.
Description
Technical field
The present invention relates to laser controlling imaging field, a kind of laser imaging control method and device are especially related to.
Background technology
High light large power semiconductor laser is the preferable pumping source of solid state laser and optical fiber laser, extensive use
In fields such as material processing, free space communication, medical treatment.With the extensive use of high-power semiconductor laser, reliability into
To limit the important factor in order of its application.
In semiconductor laser, with the raising of power output, requirement to laser heat-sinking capability also more and more higher,
Mode competition occurs in device when temperature is raised, meanwhile, the spectrum width of spectrum becomes big, therefore, radiating turn into influence device lifetime and
The important indicator of reliability, is related to quality and the success or failure of laser device performance.If laser radiates not in time, Shi Bizao
Into junction temperature rise, so that the threshold current density rise of laser, electro-optical efficiency reduction, laser wavelength occurs serious
Temperature drift, has a strong impact on the life and reliability of device.For using semiconductor laser as the fiber optic communication field of light source, with
And for dense wavelength division multiplexing system (DWDM), due to the wavelength interval very little of interchannel, keep the stabilization of wavelength just to become
Obtain extremely important.If the temperature to laser tube core is not controlled by, small temperature change will cause whole system not
It can use.In addition, semiconductor laser is thermally sensitive device, its threshold current, output wavelength and power output it is steady
Qualitative all very sensitive to temperature, its working life is also closely related with its default operating temperature.Experiment shows that temperature is often raised
The life-span of 30 DEG C of lasers can reduce an order of magnitude.Therefore how to eliminate the heat converted by dissipated power in time is realization
Efficiently, high reliability and the key of high stability semiconductor laser.
In laser image forming apparatus, although the thermal power of light source is relatively small.But it is warm due under high-precision imaging system
Degree can produce certain influence to light source, and then produce image-quality problems.
The content of the invention
The main object of the present invention is provides a kind of laser imaging control device and method, during solution laser imaging
Light-source temperature control problem, improves laser imaging quality.
The invention provides a kind of laser imaging control method, comprise the following steps：
The temperature of light source is detected, the light source is reached default operating temperature；
Laser beam is produced by the light source and is divided into two-way, to wherein all the way laser beam be modulated, amplify and
Shape correction, regard another road laser beam as local oscillation signal；
Laser beam after ovennodulation, amplification and Shape correction is divided into after multichannel beamlet and launched to mesh to be detected
Mark；
Receive each road echo-signal of target reflection to be detected；
It is in the detection target and laser radar under remote pattern, by each road echo-signal and the local oscillator
Signal carries out Frequency mixing processing, obtains mixing Hou Ge roads echo-signal, will mixing Hou Ge roads echo-signal carry out opto-electronic conversion,
Shaping and enhanced processing, and obtain waiting to visit according to by mixing, opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal
Survey the range information of target；
It is in the detection target and laser radar under closely pattern, each road echo-signal is carried out into photoelectricity turns
Change, shaping and enhanced processing, and obtain to be detected according to by opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal
The Range Profile of target each point.
Preferably, the detector includes N × N number of detection using array avalanche photodide APD, the array APD
Unit.
Preferably, it is described to obtain to be detected by mixing, opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal
The range information of target, including：
To carrying out segmentation frequency domain processing by mixing, opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal, look for
Go out frequency spectrum it is maximum when signal segment delay, the distance letter of target to be detected is obtained according to the delay of signal segment of frequency spectrum when maximum
Breath.
Preferably, it is described to be in the detection target and laser radar under closely pattern, each road echo is believed
Number opto-electronic conversion, shaping and enhanced processing are carried out, and believed according to by opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo
The Range Profile of target each point to be detected number is obtained, including：
To after opto-electronic conversion, shaping and enhanced processing echo-signal carry out time-domain analysis, and with the threshold value of setting
It is compared, pulse signal is produced during up to or over threshold value, the distance of target each point to be detected is obtained according to pulse signal
Picture.
The invention also provides a kind of laser imaging control device, including light source, optical splitter, laser processing modules, laser
Beam splitting module, local oscillator switch, echo signal reception module, frequency mixing module, detector, signal processing module, temperature control module；
The temperature control module, the temperature for detecting the light source, makes the light source reach default operating temperature；
The light source, for producing laser beam；
The optical splitter, for the laser beam to be divided into two-way, riches all the way is incident upon laser processing modules, conduct all the way
Local oscillation signal is launched to local oscillator switch；
The laser processing modules, for being modulated, amplifying and Shape correction to the laser beam；
The laser beam splitter module, for the laser beam after ovennodulation, amplification and Shape correction to be divided into many ways
Launch after light beam to target to be detected；
The local oscillator switch, for being in the detection target and laser radar under remote pattern, exports described
Signal shake to frequency mixing module；It is in the detection target and laser radar under closely pattern, forbids exporting the local oscillator letter
Number arrive frequency mixing module；
The echo signal reception module, for receiving each road echo-signal of target reflection to be detected, and is exported to institute
State frequency mixing module；
The frequency mixing module, for when receiving the local oscillation signal, by each road echo-signal and the local oscillator
Signal carries out Frequency mixing processing, obtains mixing Hou Ge road echo-signals and exports to the detector；Described is not being received
Shake signal when, each road echo-signal is exported to the detector；
The detector, for respectively to carrying out light by Frequency mixing processing or without each road echo-signal of Frequency mixing processing
Exported after electricity conversion, shaping and enhanced processing to signal processing module；
The signal processing module, for according to by mixing, opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo
Signal obtains the range information of target to be detected, or believes according to by opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo
Number obtain the Range Profile of target each point to be detected.
Preferably, the laser processing modules include modulator, amplifier and reshaper；
The modulator, processing is modulated for the laser beam；
The amplifier, for being amplified processing to the laser beam after modulation；
The reshaper, for carrying out Shape correction to the laser beam after amplification.
Preferably, the detector includes N × N number of detection using array avalanche photodide APD, the array APD
Unit；
The laser beam splitter module, for the laser beam after ovennodulation, amplification and Shape correction to be divided into N × N number of
Launch after beamlet to target to be detected.
Preferably, the signal processing module includes,
Processing unit, for being divided by mixing, opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal
Section frequency domain processing, find out frequency spectrum it is maximum when signal segment delay, obtain waiting to visit according to the delay of signal segment of frequency spectrum when maximum
Survey the range information of target；
Analytic unit, with carrying out time-domain analysis to the echo-signal after opto-electronic conversion, shaping and enhanced processing, and with
The threshold value of setting is compared, and pulse signal is produced during up to or over threshold value, and target to be detected is obtained according to pulse signal
The Range Profile of each point.
Preferably, the LASER Light Source uses pulse laser.
Preferably, the laser beam splitter module uses diffraction beam splitting system.
Laser imaging control method proposed by the present invention and device, can accurately control the temperature of light source, reach light source
The operating temperature of setting, the laser beam quality sent is more stable, while can switch between direct detection and coherent detection,
Not only have the advantages that closely place's imaging is fast, high resolution, realize it is simple, but also with utilizing relevant spy remote
The ability of high sensitivity target range is surveyed, needs to obtain single-point operating distance as far as possible with practical application medium and long distance, closely
Distance needs acquisition target multicast range information to be consistent beneficial to target identification.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the embodiment of laser imaging control method one of the present invention；
Fig. 2 is the structural representation of the embodiment of laser imaging control device one of the present invention.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
The embodiment of the present invention proposes a kind of laser imaging control method and device, can accurately control the temperature of light source, make
Light source reaches the operating temperature of setting, and the laser beam quality sent is more stable, while can be in direct detection and coherent detection
Between switch, not only have the advantages that closely place's imaging is fast, high resolution, realize it is simple, but also with remote
Utilize the ability of coherent detection high sensitivity target range.
The embodiments of the invention provide a kind of laser imaging control method and device, below in conjunction with accompanying drawing and embodiment,
The present invention will be described in further detail.
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, the present invention is not limited.
The method according to the invention embodiment is there is provided a kind of laser imaging control method, and Fig. 1 is that the inventive method is implemented
The schematic flow sheet of the laser imaging control method of example.As shown in figure 1, the laser imaging control that the inventive method embodiment is proposed
Method, including：
S10, the temperature for detecting light source, make the light source reach default operating temperature；
S20, laser beam is produced by the light source and is divided into two-way, to wherein laser beam is modulated, put all the way
Big and Shape correction, regard another road laser beam as local oscillation signal；
S30, the laser beam after ovennodulation, amplification and Shape correction is divided into after multichannel beamlet and launched to be detected
Target；
S40, each road echo-signal for receiving target reflection to be detected；
S50, in detection target and the laser radar under remote pattern, by each road echo-signal with it is described
Local oscillation signal carries out Frequency mixing processing, obtains mixing Hou Ge roads echo-signal, and mixing Hou Ge roads echo-signal is carried out into photoelectricity
Conversion, shaping and enhanced processing, and obtained according to by mixing, opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal
To the range information of target to be detected；
S60, it is under closely pattern in detection target and the laser radar, by each road echo-signal progress light
Electricity conversion, shaping and enhanced processing, and treated according to by opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal
Detect the Range Profile of target each point.
Wherein, the temperature control step in S10 is to perform completion by temperature control module.Temperature control module, including temperature induction unit,
Heat unit, cooling unit, constant temperature unit, temperature control unit.Temperature induction unit is used for the temperature for measuring light source.The temperature
Spending control unit is used for when light-source temperature is not in preset temperature range, the corresponding heating unit of control or cooling unit, adjusts
Light-source temperature is saved, it is fallen into preset temperature range.The constant temperature unit, is made up of the material of big specific heat, is surrounded on light source week
Enclose, light source is had a stable temperature environment.
The detector uses array APD, including N × N number of probe unit.Corresponding, step S30 specifically includes following step
Suddenly：
Laser beam after ovennodulation, amplification and Shape correction is divided into after N × N number of beamlet and launched to mesh to be detected
Mark.
Specifically, described obtain to be detected by mixing, opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal
The range information of target, comprises the following steps：
To carrying out segmentation frequency domain processing by mixing, opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal, look for
Go out frequency spectrum it is maximum when signal segment delay, the distance letter of target to be detected is obtained according to the delay of signal segment of frequency spectrum when maximum
Breath.
Specifically, the process opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal obtain target to be detected
The Range Profile of each point, comprises the following steps：
To after opto-electronic conversion, shaping and enhanced processing echo-signal carry out time-domain analysis, and with the threshold value of setting
It is compared, pulse signal is produced during up to or over threshold value, the distance of target each point to be detected is obtained according to pulse signal
Picture.
In order to which the laser imaging control method of the present invention is described in detail, example 1 is provided.In example 1, laser imaging control
Method processed, comprises the following steps：
(1) pulse laser, is opened, LASER Light Source is reached default operating temperature；
(2), start LASER Light Source, produce laser beam；
(3) laser beam, is divided into two-way, all the way by frequency modulation(PFM), copped wave and power amplification, another road enters local oscillator
Switch；
(4), the laser signal after amplification enters laser beam splitter system by shaping, and beam of laser is divided into N × N
Light beam, then transmitting is to detection target, and records beam emissions moment tl, and the pixel of detector is also N × N；Adjustment is received
Camera lens, detector, the position of laser beam splitter system so that each beamlet can be returned to accordingly after target object reflects
Detector pixel；
(5) laser pick-off camera lens receives each road echo-signal of target reflection to be detected；
(6) it is in the detection target and laser radar under remote pattern, local oscillator switch is in open mode, will
Each road echo-signal carries out Frequency mixing processing with the local oscillation signal, obtains mixing Hou Ge roads echo-signal；The mixing
Hou Ge roads echo-signal has respectively entered N × N faces battle array APD corresponding probe unit, and each probe unit is sharp to detecting
Optical signal carries out opto-electronic conversion, and the electric signal after conversion is by shaping, amplification；To by mixing, opto-electronic conversion, shaping and amplification
Handle Hou Ge roads echo-signal and carry out segmentation frequency domain processing, find out frequency spectrum it is maximum when signal segment delay, according to frequency spectrum most
The delay of signal segment when big obtains the range information of target to be detected；
(7) it is in the detection target and laser radar under closely pattern, is closed local oscillator switch, directly
The corresponding probe unit for making each road echo-signal have respectively entered N × N faces battle array APD is connect, each probe unit is to detection
Opto-electronic conversion is carried out to laser signal, the electric signal after conversion is by shaping, amplification, to by opto-electronic conversion, shaping and amplification
Echo-signal after processing carries out time-domain analysis, and is compared with the threshold value of setting, and arteries and veins is produced during up to or over threshold value
Signal is rushed, the Range Profile of target each point to be detected is obtained according to pulse signal；
(8) Range Profile of target each point, is sent to host computer, and is color coded, by target each point three in visual field
Dimension image is shown.
Reference picture 2, the embodiments of the invention provide a kind of laser imaging control device.Apparatus of the present invention embodiment includes control
Warm module, light source, optical splitter, laser processing modules, laser beam splitter module, local oscillator switch, echo signal reception module, mixing mould
Block, detector and signal processing module.The modules of the embodiment of the present invention are described in detail below.
Specifically, the temperature control module, including temperature induction unit, heating unit, cooling unit, constant temperature unit, temperature
Control unit.Temperature induction unit is used for the temperature for measuring light source.The temperature control unit is used for when light-source temperature is not pre-
If when in temperature range, the corresponding heating unit of control or cooling unit adjust light-source temperature, it is fallen into preset temperature model
Enclose.The constant temperature unit, is made up of the material of big specific heat, is surrounded on around light source, light source is had a stable temperature environment.
The LASER Light Source, for producing laser beam.More specific, the LASER Light Source uses pulse laser.
The optical splitter, for the laser beam to be divided into two-way, riches all the way is incident upon laser processing modules, conduct all the way
Local oscillation signal is launched to local oscillator switch.
Specifically, the laser processing modules, for being modulated, amplifying and Shape correction to the laser beam.
More specific, the laser processing modules include modulator, amplifier and reshaper；
The modulator, processing is modulated for the laser beam；
The amplifier, for being amplified processing to the laser beam after modulation；
The reshaper, for carrying out Shape correction to the laser beam after amplification.
Specifically, the laser beam splitter module, for the laser beam after ovennodulation, amplification and Shape correction to be divided into
Launch after multichannel beamlet to target to be detected.More specific, the laser beam splitter module uses diffraction beam splitting system, preferably
For efficiently extension beam splitting system.
In apparatus of the present invention embodiment, the detector uses array APD (avalanche photodide), including N × N number of
Probe unit；Corresponding, the laser beam splitter module is specifically for by the laser light after ovennodulation, amplification and Shape correction
Beam, which is divided into after N × N number of beamlet, to be launched to target to be detected.
Specifically, the local oscillator switch, for being in the detection target and laser radar under remote pattern, output
The local oscillation signal is to frequency mixing module；It is in the detection target and laser radar under closely pattern, forbids output described
Local oscillation signal is to frequency mixing module.
Specifically, the echo signal reception module, each road echo-signal for receiving target reflection to be detected.
More specific, the echo signal reception module is laser pick-off camera lens, and the laser pick-off camera lens can be
Single port footpath camera lens.
Specifically, the frequency mixing module, for when receiving the local oscillation signal, by each road echo-signal and institute
State local oscillation signal and carry out Frequency mixing processing, obtain mixing Hou Ge road echo-signals and export to the detector；Do not receiving
During the local oscillation signal, directly each road echo-signal is exported to the detector.
Specifically, the detector, for respectively to believing by Frequency mixing processing or without each road echo of Frequency mixing processing
Exported after number carrying out opto-electronic conversion, shaping and enhanced processing to signal processing module.
In the present invention, echo signal reception module, detector, the position of laser beam splitter module to be adjusted so that each
Beamlet can return to corresponding detector cells after target to be detected reflection.
Specifically, the signal processing module, for according to after mixing, opto-electronic conversion, shaping and enhanced processing
Each road echo-signal obtains the range information of target to be detected, or according to each after opto-electronic conversion, shaping and enhanced processing
Road echo-signal obtains the Range Profile of target each point to be detected.
It is more specific, the signal processing module specifically for,
To carrying out segmentation frequency domain processing by mixing, opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal, look for
Go out frequency spectrum it is maximum when signal segment delay, the distance letter of target to be detected is obtained according to the delay of signal segment of frequency spectrum when maximum
Breath；
To after opto-electronic conversion, shaping and enhanced processing echo-signal carry out time-domain analysis, and with the threshold value of setting
It is compared, pulse signal is produced during up to or over threshold value, the distance of target each point to be detected is obtained according to pulse signal
Picture.
In the laser imaging control device that apparatus of the present invention embodiment is provided, LASER Light Source uses pulse laser, visits
Survey device and use array APD (avalanche photodide), using dual-mode laser Detecting System, receive mode and switched by local oscillator straight
Connect and switch between detection and coherent detection, when detecting target range laser radar farther out, open at local oscillator switch, laser radar
In coherent detection mode, detector array is used as single-element detector, local oscillation signal and echo-signal is mixed, by when
Signal after frequency analysis mixing measures the range information of target point；When laser radar distance objective is nearer, closes local oscillator and open
Close, detector array is used as multiunit detector, each probe unit can detect sub-light all the way on detector array
The range information that beam is returned, finally gives high resolution range profile, is conducive to target detail to recognize.
Laser imaging control method proposed by the present invention and device, can accurately control the temperature of light source, reach light source
The operating temperature of setting, the laser beam quality sent is more stable, while can switch between direct detection and coherent detection,
Not only have the advantages that closely place's imaging is fast, high resolution, realize it is simple, but also with utilizing relevant spy remote
The ability of high sensitivity target range is surveyed, needs to obtain single-point operating distance as far as possible with practical application medium and long distance, closely
Distance needs acquisition target multicast range information to be consistent beneficial to target identification.
Embodiments of the invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included within scope of the presently claimed invention.
Claims (10)
1. a kind of laser imaging control method, it is characterised in that comprise the following steps：
The temperature of light source is detected, the light source is reached default operating temperature；
Laser beam is produced by the light source and is divided into two-way, to wherein laser beam is modulated, amplified and shaping all the way
Processing, regard another road laser beam as local oscillation signal；
Laser beam after ovennodulation, amplification and Shape correction is divided into after multichannel beamlet and launched to target to be detected；
Receive each road echo-signal of target reflection to be detected；
It is in the detection target and laser radar under remote pattern, by each road echo-signal and the local oscillation signal
Frequency mixing processing is carried out, mixing Hou Ge roads echo-signal is obtained, mixing Hou Ge roads echo-signal is subjected to opto-electronic conversion, shaping
And enhanced processing, and obtain mesh to be detected according to by mixing, opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal
Target range information；
Be in detection target and the laser radar under closely pattern, will each road echo-signal progress opto-electronic conversion,
Shaping and enhanced processing, and obtain mesh to be detected according to by opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal
Mark the Range Profile of each point.
2. laser imaging control method according to claim 1, it is characterised in that the detector uses array snowslide light
Electric diode APD, the array APD include N × N number of probe unit.
3. laser imaging control method according to claim 1, it is characterised in that described to turn according to by mixing, photoelectricity
Change, shaping and enhanced processing Hou Ge roads echo-signal obtain the range information of target to be detected, including：
To carrying out segmentation frequency domain processing by mixing, opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal, frequency is found out
The delay of signal segment when spectrum is maximum, the range information of target to be detected is obtained according to the delay of signal segment of frequency spectrum when maximum.
4. laser imaging control method according to claim 1, it is characterised in that described in the detection target and laser
Radar is under closely pattern, and each road echo-signal is carried out into opto-electronic conversion, shaping and enhanced processing, and according to process
Opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal obtain the Range Profile of target each point to be detected, including：
Time-domain analysis is carried out to the echo-signal after opto-electronic conversion, shaping and enhanced processing, and is carried out with the threshold value of setting
Compare, pulse signal is produced during up to or over threshold value, the Range Profile of target each point to be detected is obtained according to pulse signal.
5. a kind of laser imaging control device, it is characterised in that including light source, optical splitter, laser processing modules, laser beam splitter mould
Block, local oscillator switch, echo signal reception module, frequency mixing module, detector, signal processing module, temperature control module；
The temperature control module, the temperature for detecting the light source, makes the light source reach default operating temperature；
The light source, for producing laser beam；
The optical splitter, for the laser beam to be divided into two-way, riches all the way is incident upon laser processing modules, all the way as local oscillator
Signal is launched to local oscillator switch；
The laser processing modules, for being modulated, amplifying and Shape correction to the laser beam；
The laser beam splitter module, for the laser beam after ovennodulation, amplification and Shape correction to be divided into multichannel beamlet
After launch to target to be detected；
The local oscillator switch, for being in the detection target and laser radar under remote pattern, exports the local oscillator letter
Number arrive frequency mixing module；It is in detection target and the laser radar under closely pattern, forbids exporting the local oscillation signal and arrive
Frequency mixing module；
The echo signal reception module, for receiving each road echo-signal of target reflection to be detected, and is exported to described mixed
Frequency module；
The frequency mixing module, for when receiving the local oscillation signal, by each road echo-signal and the local oscillation signal
Frequency mixing processing is carried out, mixing Hou Ge road echo-signals is obtained and exports to the detector；The local oscillator letter is not being received
Number when, each road echo-signal is exported to the detector；
The detector, for respectively to carrying out photoelectricity turn by Frequency mixing processing or without each road echo-signal of Frequency mixing processing
Change, export to signal processing module after shaping and enhanced processing；
The signal processing module, for according to by mixing, opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal
The range information of target to be detected is obtained, or is obtained according to by opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal
To the Range Profile of target each point to be detected.
6. laser imaging control device according to claim 5, it is characterised in that the laser processing modules include modulation
Device, amplifier and reshaper；
The modulator, processing is modulated for the laser beam；
The amplifier, for being amplified processing to the laser beam after modulation；
The reshaper, for carrying out Shape correction to the laser beam after amplification.
7. laser imaging control device according to claim 5, it is characterised in that the detector uses array snowslide light
Electric diode APD, the array APD include N × N number of probe unit；
The laser beam splitter module, for the laser beam after ovennodulation, amplification and Shape correction to be divided into N × N number of sub-light
Launch after beam to target to be detected.
8. laser imaging control device according to claim 5, it is characterised in that the signal processing module includes,
Processing unit, for carrying out segmentation frequency by mixing, opto-electronic conversion, shaping and enhanced processing Hou Ge roads echo-signal
Domain is handled, find out frequency spectrum it is maximum when signal segment delay, mesh to be detected is obtained according to the delay of signal segment of frequency spectrum when maximum
Target range information；
Analytic unit, with carrying out time-domain analysis to the echo-signal after opto-electronic conversion, shaping and enhanced processing, and with setting
Threshold value be compared, produce pulse signal during up to or over threshold value, target each point to be detected obtained according to pulse signal
Range Profile.
9. laser imaging control device according to claim 5, it is characterised in that the LASER Light Source uses pulse laser
Device.
10. laser imaging control device according to claim 5, it is characterised in that the laser beam splitter module, which is used, spreads out
Penetrate beam splitting system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710423918.0A CN107238843A (en) | 2017-06-07 | 2017-06-07 | laser imaging control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710423918.0A CN107238843A (en) | 2017-06-07 | 2017-06-07 | laser imaging control method and device |
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| Publication Number | Publication Date |
|---|---|
| CN107238843A true CN107238843A (en) | 2017-10-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133615A (en) * | 2019-04-17 | 2019-08-16 | 深圳市速腾聚创科技有限公司 | A kind of laser radar system |
| WO2020142955A1 (en) * | 2019-01-09 | 2020-07-16 | 深圳市大疆创新科技有限公司 | Ranging device and mobile platform |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597468A (en) * | 2016-11-16 | 2017-04-26 | 中国电子科技集团公司第十研究所 | Dual-mode laser imaging system and imaging method |
| CN106707260A (en) * | 2016-12-23 | 2017-05-24 | 中国电子科技集团公司第十研究所 | Light frequency tracking and locking system and method for laser coherent ranging |
-
2017
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597468A (en) * | 2016-11-16 | 2017-04-26 | 中国电子科技集团公司第十研究所 | Dual-mode laser imaging system and imaging method |
| CN106707260A (en) * | 2016-12-23 | 2017-05-24 | 中国电子科技集团公司第十研究所 | Light frequency tracking and locking system and method for laser coherent ranging |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020142955A1 (en) * | 2019-01-09 | 2020-07-16 | 深圳市大疆创新科技有限公司 | Ranging device and mobile platform |
| CN111684298A (en) * | 2019-01-09 | 2020-09-18 | 深圳市大疆创新科技有限公司 | Distance measuring device and mobile platform |
| CN110133615A (en) * | 2019-04-17 | 2019-08-16 | 深圳市速腾聚创科技有限公司 | A kind of laser radar system |
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