CN207074262U - Laser radar and its two dimensional phased battle array laser emission element - Google Patents
Laser radar and its two dimensional phased battle array laser emission element Download PDFInfo
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- CN207074262U CN207074262U CN201720669527.2U CN201720669527U CN207074262U CN 207074262 U CN207074262 U CN 207074262U CN 201720669527 U CN201720669527 U CN 201720669527U CN 207074262 U CN207074262 U CN 207074262U
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Abstract
It the utility model is related to a kind of laser radar and its two dimensional phased battle array laser emission element.Two dimensional phased battle array laser emission element includes laser beam splitter component, multiple light transmitting antennas in matrix distribution and multiple phase regulators.Coordinated by laser beam splitter component and multiple smooth transmitting antennas, multi-path laser can be sent.Multi-path laser can be made fixed skew to be present moreover, adjusting the phase of multi-path laser by phase regulator, so as to obtain antenna pattern by interference in far field, to form most strong main beam in particular directions, realize scanning.Further, the phase for changing multi-path laser can obtain different antenna patterns, so as to realize comprehensive scanning.Therefore, laser radar just can realize comprehensive monitoring without mechanical gyro unit.Moreover, the speed of Laser Radar Scanning is determined by phase-adjusted frequency, therefore the sweep speed of laser radar is also faster.Therefore, the small volume of above-mentioned laser radar and its two dimensional phased battle array laser emission element and sweep speed is higher.
Description
Technical field
Technical field of laser detection is the utility model is related to, more particularly to a kind of laser radar and its two dimensional phased battle array laser
Transmitter unit.
Background technology
Laser radar is a kind of sensor with lidar light detection and ranging, its principle and common sound radar and sonar class
Seemingly.Go out laser pulse to objective emission with emitter, surveyed by the delay and intensity of reception device measurement return pulse
Measure the distance and reflectivity of target.
To realize comprehensive monitoring, radar need to carry out the scanning in 360 degree of spaces.Traditional radar is typically driven using machinery
Dynamic pattern, i.e. mechanical device drive the transmitter unit all-direction rotation of radar, to realize 360 degree of scannings.But such thunder
Up to the bulky mechanical device of use so that sweep speed is slow.Moreover, mechanical rotation device is difficult to continue normally after failure
Use.
Similar with traditional ordinary radar, laser radar in the market also carries out 360 using the mode of mechanical rotation
The spacescan of degree.This has resulted in laser radar as conventional radar, and product has that volume is big, scanning is slow, price is high
The shortcomings that with being difficult to continue normal use after mechanical device failure, so as to be unfavorable for large-scale use in consumer electronics field.
Utility model content
Based on this, it is necessary to for the problem of existing laser radar volume is big, scanning is slow, there is provided a kind of small volume and sweep
Retouch the higher laser radar of speed and its two dimensional phased battle array laser emission element.
A kind of two dimensional phased battle array laser emission element, including：
Laser beam splitter component, including light incident side and multiple light exit sides, laser beam is after the light incident side incidence
It is emitted respectively from the multiple light exit side, to obtain multi-path laser；
It is multiple to be used to launching the light transmitting antennas of the multi-path laser, the multiple smooth transmitting antenna respectively with it is the multiple
Light exit side coordinates, to be formed multiple parallel with one another and launched for the laser optical path of multi-path laser transmission, the multiple light
Antenna is in NxM matrix distributions, and wherein M, N is the integer more than or equal to 2；And
Multiple phase regulators, each phase regulator are described more on the corresponding laser optical path for adjusting
The phase of road laser.
In one of the embodiments, the laser beam splitter component arrives M photo-couplers including 1 to N photo-couplers and N number of 1,
Wherein, the incidence end of described 1 to N photo-couplers arrives the exit end of M photo-couplers as institute as the light incident side, described 1
State light exit side, and output end of the incidence end respectively with described 1 to N photo-couplers of N number of described 1 to M photo-couplers connects.
In one of the embodiments, described 1 to M photo-couplers and described 1 to N photo-couplers be edge couplers or light
Grid coupler.
In one of the embodiments, the multiple phase regulator is respectively arranged on the multiple laser optical path.
In one of the embodiments, positioned at the NxM matrixes with the smooth transmitting antenna institute in a line or same row
The corresponding laser optical path, phase adjusted is realized by the phase regulator of synchronization.
In one of the embodiments, positioned at the NxM matrixes with the smooth transmitting antenna institute in a line or same row
The corresponding laser optical path, phase adjusted is realized by the same phase regulator.
In one of the embodiments, the smooth transmitting antenna is grating coupler.
In one of the embodiments, the phase regulator is to include fiber waveguide and for adding to the fiber waveguide
The microheater of heat, the fiber waveguide are located on the laser optical path.
In one of the embodiments, the phase regulator includes Pn sections and for adjusting the Pn sections both end voltage
Voltage regulator, the Pn sections are on the laser optical path.
A kind of laser radar, it is characterised in that including：
Two dimensional phased battle array laser emission element as any one of above-mentioned preferred embodiment；
Echo receiving unit, for receiving the multi-path laser to interfere in far field, the radiation main beam to be formed is anti-through subject matter
Penetrate caused echo-signal；And
With the two dimensional phased battle array laser emission element and the processor of Echo receiving unit communication connection.
Above-mentioned laser radar and its two dimensional phased battle array laser emission element, day is launched by laser beam splitter component and multiple light
Line coordinates, and can send multi-path laser.Moreover, by phase regulator regulation multi-path laser can be made fixed phase difference to be present, from
And antenna pattern is obtained by interference in far field, to form most strong main beam in particular directions, realize scanning.Further
, the phase change of multi-path laser can obtain different antenna patterns in far field, so that the direction of most strong main beam
Realize that dynamic adjusts, finally realize comprehensive scanning.Therefore, laser radar just can be realized comprehensive without mechanical gyro unit
Monitoring, so as to be advantageous to reduce volume.Further, the speed of Laser Radar Scanning is determined by phase-adjusted frequency, without
It can be limited by mechanical gyro unit rotary speed, therefore the sweep speed of laser radar is also faster.Therefore, above-mentioned laser radar
And its small volume and sweep speed of two dimensional phased battle array laser emission element are higher.
Brief description of the drawings
Fig. 1 is the module diagram of laser radar in the utility model preferred embodiment；
Fig. 2 is the structural representation of two dimensional phased battle array laser emission element in laser radar shown in Fig. 1.
Embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
State.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can come in many different forms
Realize, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is made to of the present utility model
The understanding of disclosure more thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model
The implication that the technical staff in domain is generally understood that is identical.It is simply in term used in the description of the present utility model herein
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " include
The arbitrary and all combination of one or more related Listed Items.
Referring to Fig. 1, the laser radar 10 in the utility model preferred embodiment includes two dimensional phased battle array Laser emission list
Member 100, Echo receiving unit 101 and processor 102.
Two dimensional phased battle array laser emission element 100 is used to send multi-path laser, and laser can produce back after subject matter reflects
Ripple signal.
Specifically, it is that relevant (frequency is identical and with solid between the multichannel light that phased-array laser transmitter unit 100 is sent
Phase bit is poor).Therefore, multi-path laser can form specific antenna pattern after interfering in far field.I.e. in a particular direction
A branch of most strong main beam can be formed, other weaker sub-beams are had in other direction of the launch.Main beam and sub-beams are simultaneously
It is not parallel, but there is corresponding angle.Laser radar 10 runs into target in use, the echo-signal gathered is the main beam
The signal obtained after thing reflection.
Echo receiving unit 101 is used for receives echo-signal.Processor 102 carries out Treatment Analysis to echo-signal, so as to
Obtain the parameters such as shape, the distance of subject matter.
Also referring to Fig. 2, the utility model also provides a kind of two dimensional phased battle array laser emission element 100, including laser
Beam splitting component 110, light transmitting antenna 120 and phase regulator 130.
Laser beam splitter component 110 includes light incident side and multiple light exit sides.Laser beam divides after light incident side incidence
It is not emitted from multiple light exit sides, to obtain multi-path laser.When laser radar 10 works, laser light that LASER Light Source 20 is sent
Beam enters laser beam splitter component 110 from light incident side, is finally emitted from light exit side, obtains more beam power identical laser signals
(i.e. " multi-path laser ").
Light transmitting antenna more than 120.Wherein, multiple smooth transmitting antennas are in NxM matrix distributions, and M, N are to be more than or wait
In 2 integer.Multiple smooth transmitting antennas 120 coordinate with multiple light exit sides respectively, to be formed multiple parallel with one another and supply multichannel
The laser optical path of laser transmission.Specifically, light exit side can be connected with light transmitting antenna 120 by fiber waveguide, to realize light beam
Transmit therebetween.Wherein, fiber waveguide can be silicon, optical fiber etc..Therefore, the multi-path laser signal sent through light exit side can
Into light transmitting antenna 120, and further it is transmitted into by multiple smooth transmitting antennas 120 in space.
Due to being parallel with one another between multiple laser optical paths, thus it is relatively independent between each laser optical path.Even if wherein
One laser optical path (fiber waveguide of light transmitting antenna 120 or connection light transmitting antenna 120) is broken down, and also remaining will not be swashed
Light light path has an impact.Therefore, the function of two dimensional phased battle array laser emission element 100 still can be normal when there is local fault
Realize, so as to improve the reliability of laser radar 10.
Phase regulator 130 is multiple.Wherein, each phase regulator 130 is used to adjust on corresponding laser optical path
The phase of multi-path laser.Phase regulator 130 can be one-to-one or one-to-many with laser optical path.
The multi-path laser signal that multiple smooth transmitting antennas 120 are sent interferes in far field, so as to form specific direction
Most strong beam, realize to the scanning in particular range.And multi-path laser signal interfere the direction of obtained most strong beam with
Phase per laser signal all the way is relevant.Therefore, multi-path laser is adjusted by phase regulator 130 respectively according to preset rules
Phase, multi-path laser can be made to obtain different scanning ranges by interference in the distance, so that scanning range is dynamic, entered
And realize comprehensive scanning.
Further, the speed that laser radar 10 scans carries out phase-adjusted frequency by phase regulator 130 and determined, and
It will not be limited by mechanical gyro unit rotary speed.And phase-adjusted speed can realize circuit control, response is rapid, therefore
The sweep speed of laser radar 10 is also faster.
In the present embodiment, multiple phase regulators 130 are respectively arranged on multiple laser optical paths.
Each laser optical path corresponds to a phase regulator 130, i.e., phase regulator 130 and laser optical path are a pair
One.Therefore, for the laser signal by the transmission of each laser optical path, the independent regulation of phase can be carried out respectively, mutually not shadow
Ring.
In the present embodiment, positioned at NxM matrixes with the light transmitting antenna 120 in a line or same row corresponding to laser light
Road, phase adjusted is realized by the phase regulator 130 of synchronization.
Specifically, the phase regulator 130 by synchronization is realized that phase-adjusted laser optical path is referred to as synchronous laser optical path.
Wherein, synchronous laser optical path, the laser optical path of the laser signal of multiple transmission same phases, its corresponding light transmitting antenna are referred to
The 120 laser signal phases sent are also identical.Specifically in the present embodiment, the light transmitting antenna corresponding to synchronous laser optical path
120 are located at the same row of NxM matrixes.Pass through the laser signal sent to the light transmitting antenna 120 in same a line or same row
Synchronization Control is realized, operand can be reduced while meeting that laser radar 10 scans demand.
In another embodiment, positioned at NxM matrixes with the light transmitting antenna in a line or same row corresponding to laser
Light path, phase adjusted is realized by same phase regulator 130.
Specifically, same phase regulator 130 realizes that phase-adjusted multiple light paths are formed and upper one embodiment phase
Same synchronous laser optical path.Its difference is：Synchronous laser optical path in upper one embodiment is by multiple synchronous phase adjusteds
Device 130 realizes phase adjusted, and the synchronous laser optical path in the present embodiment realizes that phase is adjusted by same phase regulator 130
Section, i.e. phase regulator 130 are one-to-many with laser optical path.
Further, can by same row or with a line set a unified phase regulator 130, so as to respectively
Realize the phase adjusted of laser signal in the laser optical path in corresponding row or column.It is right by using same phase regulator 130
Same row or the phase of the laser signal sent with the light transmitting antenna 120 in a line synchronize control, can make laser thunder
Performance up to 10 meets demand.Meanwhile it can also effectively simplify structure.
When laser radar 10 is scanned, the light transmitting antenna 120 being located in synchronous laser optical path of same row is launched
The laser signal of same phase.And the light transmitting antenna 120 on other row can then launch the laser signal of out of phase (as schemed
Shown in 2, φ1, φ2, φ3..., φM).By controlling phase regulator 130, so that the light transmitting antenna 120 of different lines is launched
The laser signal gone out carries out Phase-switching, so as to generate a dynamic scan scope by interfering in far field.
In the present embodiment, laser beam splitter component 110 arrives M photo-couplers 113 including 1 to N photo-couplers 111 and N number of 1.
Wherein, the incidence end of 1 to N photo-couplers 111 is used as light incident side, and 1 arrives the exit end of M photo-couplers 113 as light exit side,
And output end of the incidence end respectively with 1 to N photo-couplers 111 of N number of 1 to M photo-couplers 113 connects.
Specifically, the effect of 1 to N photo-couplers 111 is that incident light is equally divided into N beam emergent lights, 1 arrives M photo-couplers
113 effect is also identical.The laser beam that LASER Light Source 20 is sent obtains the outgoing of N beams after 1 arrives the incidence of N photo-couplers 111
Light；Further, N beams emergent light respectively from N number of 1 to M photo-couplers 113 incidence end it is incident；Finally, obtain M and be multiplied by N beams swashing
Optical signal (i.e. multi-path laser).Corresponding, the quantity of light transmitting antenna 120 is also multiplied by N number of for M.
It is pointed out that in other embodiments, laser beam splitter component 110 can be also made up of multiple beam splitters.Its
In, multiple beam splitters are divided into multiple levels, the light beam splitting of the incidence end of the beam splitter of next level and a upper level
The exit end connection of device.Beam splitter can be one-to-two beam splitter, or one point of other kinds of beam splitter of the fourth class.
In the present embodiment, 1 to N photo-couplers 111 and 1 to M photo-couplers 113 be edge couplers (edge
) or grating coupler (grating coupler) couple.
In the present embodiment, light transmitting antenna 120 is grating coupler.
Wherein, 1 can to M photo-couplers 113, light transmitting antenna 120 and phase regulator 130 to N photo-couplers 111 and 1
It is integrated on chip, so as to further reduce the volume of two dimensional phased battle array laser emission element 100 and laser radar 10.Specifically
, 1 to N photo-couplers 111,1 to M photo-couplers 113, light transmitting antenna 120 and phase regulator 130 can by based on
CMOS technology compatible " silicon integreted phontonics light path technology " is implemented on chip.
In the present embodiment, phase regulator 130 be include fiber waveguide and for heated to fiber waveguide miniature plus
Hot device, fiber waveguide are located on laser optical path.
Specifically, fiber waveguide is located on laser optical path, then multi-path laser can pass through fiber waveguide in transmitting procedure.Laser exists
The phase propagated in fiber waveguide is determined by its effective refractive index (effective refractive index) in fiber waveguide.
And effective refractive index changes with the temperature of fiber waveguide, i.e., " thermo-optic effect ".Therefore, fiber waveguide is carried out using microheater
Heating stops heating the temperature that just can change fiber waveguide, so as to adjust the phase of corresponding multi-path laser.
In another embodiment, phase regulator 130 includes the voltage tune that Pn is saved and both end voltage is saved for adjusting Pn
Device is saved, Pn sections are on laser optical path.
Specifically, effective refractive index is also relevant with the concentration of carrier in fiber waveguide (electronics and hole), i.e. " plasma color
Dissipate effect ".Pn knots both ends add different voltages that the concentration of carrier in fiber waveguide can be caused to change, so as to change effective folding
Penetrate rate, and then the phase of multi-path laser corresponding to change.
It is pointed out that in other embodiments, phase regulator 130 realizes that phase-adjusted mode is not limited to the above
Two kinds.
Above-mentioned laser radar 10 and its two dimensional phased battle array laser emission element 100, by laser beam splitter component 110 with it is multiple
Light transmitting antenna 120 coordinates, and can send multi-path laser.Moreover, it is solid to exist multi-path laser by the regulation of phase regulator 130
Fixed phase difference, it is real to form most strong main beam in particular directions so as to obtain antenna pattern by interference in far field
Now scan.Further, the phase change of multi-path laser can obtain different antenna patterns in far field, so that most strong
The direction of main beam realizes that dynamic adjusts, and finally realizes comprehensive scanning.Therefore, laser radar 10 is without mechanical gyro unit
Just comprehensive monitoring can be realized, so as to be advantageous to reduce volume.Further, the speed that laser radar 10 scans is by phase adjusted
Frequency determine that without being limited by mechanical gyro unit rotary speed, therefore the sweep speed of laser radar 10 is also faster.
Therefore, the small volume of above-mentioned laser radar 10 and its two dimensional phased battle array laser emission element 100 and sweep speed is higher.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that the common skill for this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
- A kind of 1. two dimensional phased battle array laser emission element, it is characterised in that including：Laser beam splitter component, including light incident side and multiple light exit sides, laser beam are distinguished after the light incident side incidence It is emitted from the multiple light exit side, to obtain multi-path laser；Multiple light transmitting antennas for being used to launch the multi-path laser, the multiple smooth transmitting antenna go out with the multiple light respectively Penetrate end to coordinate, to form laser optical path that is multiple parallel with one another and transmitting for the multi-path laser, the multiple smooth transmitting antenna In NxM matrix distributions, wherein M, N is the integer more than or equal to 2；AndMultiple phase regulators, the multichannel that each phase regulator is used to adjust on the corresponding laser optical path swash The phase of light.
- 2. two dimensional phased battle array laser emission element according to claim 1, it is characterised in that the laser beam splitter component includes 1 to N photo-couplers and N number of 1 arrive M photo-couplers, wherein, described 1 arrives the incidence ends of N photo-couplers as the light incident side, Described 1 to M photo-couplers exit end as the light exit side, and N number of described 1 to M photo-couplers incidence end respectively with The output end of described 1 to N photo-couplers connects.
- 3. two dimensional phased battle array laser emission element according to claim 2, it is characterised in that described 1 arrives M photo-couplers and institute State 1 to N photo-couplers be edge couplers or grating coupler.
- 4. two dimensional phased battle array laser emission element according to claim 1, it is characterised in that the multiple phase regulator point It is not arranged on the multiple laser optical path.
- 5. two dimensional phased battle array laser emission element according to claim 4, it is characterised in that same positioned at the NxM matrixes The laser optical path corresponding to the smooth transmitting antenna on row or same row, phase is realized by the phase regulator of synchronization Position regulation.
- 6. two dimensional phased battle array laser emission element according to claim 1, it is characterised in that same positioned at the NxM matrixes The laser optical path corresponding to the smooth transmitting antenna on row or same row, phase is realized by the same phase regulator Position regulation.
- 7. two dimensional phased battle array laser emission element according to claim 1, it is characterised in that the smooth transmitting antenna is grating Coupler.
- 8. according to any one of claim 1 to the 7 two dimensional phased battle array laser emission element, it is characterised in that the phase is adjusted It is to include fiber waveguide and the microheater for being heated to the fiber waveguide to save device, and the fiber waveguide is located at the laser In light path.
- 9. according to any one of claim 1 to the 7 two dimensional phased battle array laser emission element, it is characterised in that the phase is adjusted Section device includes the voltage regulator that Pn is saved and both end voltage is saved for adjusting the Pn, and the Pn sections are located at the laser optical path On.
- A kind of 10. laser radar, it is characterised in that including：Two dimensional phased battle array laser emission element as described in above-mentioned any one of claim 1~9；Echo receiving unit, for receiving the multi-path laser to interfere in far field, the radiation main beam to be formed reflects institute through subject matter Caused echo-signal；AndWith the two dimensional phased battle array laser emission element and the processor of Echo receiving unit communication connection.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108459448A (en) * | 2018-03-29 | 2018-08-28 | 中国科学院西安光学精密机械研究所 | Two-dimensional light beam scanning method based on optical phased array and optical phased array |
| CN108693513A (en) * | 2017-06-09 | 2018-10-23 | 深圳市涵光半导体有限公司 | Laser radar and its two dimensional phased battle array laser emission element |
| CN109444851A (en) * | 2018-11-19 | 2019-03-08 | 深圳市速腾聚创科技有限公司 | Laser body and phased-array laser radar |
| CN110456324A (en) * | 2019-07-11 | 2019-11-15 | 中国电子科技集团公司信息科学研究院 | Integrated phased-array laser radar system |
| CN110531440A (en) * | 2019-09-26 | 2019-12-03 | 中国科学院长春光学精密机械与物理研究所 | Airfield runway foreign matter monitoring system based on phased laser array technology |
| CN111198353A (en) * | 2018-11-19 | 2020-05-26 | 深圳市速腾聚创科技有限公司 | Laser emission system, laser radar and laser emission method |
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2017
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693513A (en) * | 2017-06-09 | 2018-10-23 | 深圳市涵光半导体有限公司 | Laser radar and its two dimensional phased battle array laser emission element |
| CN108459448A (en) * | 2018-03-29 | 2018-08-28 | 中国科学院西安光学精密机械研究所 | Two-dimensional light beam scanning method based on optical phased array and optical phased array |
| CN109444851A (en) * | 2018-11-19 | 2019-03-08 | 深圳市速腾聚创科技有限公司 | Laser body and phased-array laser radar |
| CN111198353A (en) * | 2018-11-19 | 2020-05-26 | 深圳市速腾聚创科技有限公司 | Laser emission system, laser radar and laser emission method |
| CN110456324A (en) * | 2019-07-11 | 2019-11-15 | 中国电子科技集团公司信息科学研究院 | Integrated phased-array laser radar system |
| CN110531440A (en) * | 2019-09-26 | 2019-12-03 | 中国科学院长春光学精密机械与物理研究所 | Airfield runway foreign matter monitoring system based on phased laser array technology |
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