CN207851292U - Laser radar - Google Patents
Laser radar Download PDFInfo
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- CN207851292U CN207851292U CN201820066594.XU CN201820066594U CN207851292U CN 207851292 U CN207851292 U CN 207851292U CN 201820066594 U CN201820066594 U CN 201820066594U CN 207851292 U CN207851292 U CN 207851292U
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Abstract
A kind of laser radar is disclosed in the embodiments of the present invention, laser radar includes：Semiconductor laser, for emitting shoot laser；The first collimation unit of transmitting terminal, the shoot laser for collimating the semiconductor laser；Microlens array is emitted sub- laser for the shoot laser after collimation to be divided into N beams, and the N beams is emitted sub- laser coupled and enter N fibre delay line；Fibre delay line, the outgoing time for postponing the sub- laser of outgoing；Bundling device, the sub- laser of outgoing for exporting fibre delay line are combined into a shoot laser；The second collimation unit of transmitting terminal, for collimating the shoot laser from the bundling device.The utility model can improve the launch point frequency of laser radar, to improve the angular resolution of laser radar.
Description
Technical field
The utility model is related to detection field, more particularly to a kind of laser radar.
Background technology
Laser radar is to emit laser beam come the radar system of the characteristic quantities such as the position, the speed that detect target, work
It is first to objective emission exploring laser light light beam, then by the reflected signal of slave target received and transmitting signal as principle
It is compared, after making proper treatment, so that it may obtain target for information about, such as target range, orientation, height, speed, appearance
The parameters such as state, even shape.
Transmitter is the component for emitting shoot laser in laser radar, is the important component of laser radar.It is real
On border, the laser of transmitter transmitting is discontinuous, is sent with impulse form, the pulse that transmitter generates in one second
Number is known as the repetition of transmitter.The repetition of transmitter is higher, and the points being presented in the unit interval on laser radar are more,
So also referred to as laser radar launch point frequency.And it is presented on that the points on laser radar are more, in the visual field one of laser radar
In the case of fixed, then at angle interval between points with regard to smaller, i.e. the angular resolution of laser radar is higher.
In the prior art, the launch point frequency that there are no a kind of by improving laser radar is to improve laser radar angular resolution
The method of rate.
Utility model content
Provided in the utility model embodiment a kind of laser radar and, the launch point frequency of laser radar can be improved, improved
The angular resolution of laser radar.
In order to solve the above-mentioned technical problem, the utility model embodiment discloses following technical solution：
On the one hand, a kind of laser radar is provided, including：
Semiconductor laser, for emitting shoot laser；
The first collimation unit of transmitting terminal, the shoot laser for collimating the semiconductor laser；
Microlens array is emitted sub- laser for the shoot laser after collimation to be divided into N beams, and the N beams is emitted son
Laser coupled enters N fibre delay line；
Fibre delay line, the outgoing time for postponing the sub- laser of outgoing；
Bundling device, the sub- laser of outgoing for exporting fibre delay line are combined into a shoot laser；
The second collimation unit of transmitting terminal, for collimating the shoot laser from the bundling device.
Optionally, the first collimation unit of the transmitting terminal includes：
Slow axis collimation unit collimates the shoot laser for the slow axis in the semiconductor laser；
Fast axis collimation unit is used for the shoot laser described in the fast axis collimation of the semiconductor laser.
Optionally, the delay-time difference between the fibre delay line and adjacent fiber delay line is：
C/ (N*f),
Wherein, c is the light velocity, and N is the item number for being emitted sub- laser, and f is the launch point frequency of semiconductor laser.
A kind of laser radar, including semiconductor laser are disclosed in the embodiments of the present invention, for emitting outgoing
Laser；The first collimation unit of transmitting terminal, the shoot laser for collimating the semiconductor laser；Microlens array is used
It is emitted sub- laser in the shoot laser after collimation is divided into N beams, and the sub- laser coupled of N beams outgoing is entered into N optical fiber and is prolonged
Slow line；Fibre delay line, the outgoing time for postponing the sub- laser of outgoing；Bundling device, for exporting fibre delay line
The sub- laser of outgoing be combined into a shoot laser；The second collimation unit of transmitting terminal, for collimating the outgoing from the bundling device
Laser.In the utility model embodiment, N beams have the time difference between being emitted sub- laser, can be emitted to the same detection successively
On point, it is equivalent to the laser particle number improved in the unit interval on the same test point, therefore the utility model embodiment
Laser radar can improve the launch point frequency of laser radar, to improve the angular resolution of laser radar.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 show the structural schematic diagram of the laser radar of the utility model embodiment；
Fig. 2 show the structural schematic diagram of the laser radar of the utility model embodiment；
Fig. 3 show the laser facula schematic diagram of the laser radar of the utility model embodiment.
Specific implementation mode
The utility model following examples provide a kind of laser radar, can improve the launch point frequency of laser radar, improve
The angular resolution of laser radar.
Fig. 1 show the structural schematic diagram of the laser radar of the utility model embodiment, as shown in Figure 1, the laser thunder
Up to including：
Semiconductor laser 110, for emitting shoot laser；
The first collimation unit of transmitting terminal 120, the shoot laser for collimating the transmitting of the semiconductor laser 110；
Microlens array 130 is emitted sub- laser for the shoot laser after collimation to be divided into N beams, and the N beams is emitted
Sub- laser coupled enters N fibre delay line；
Fibre delay line 140, the outgoing time for postponing the sub- laser of outgoing；
Bundling device 150, the sub- laser of outgoing for exporting fibre delay line are combined into a shoot laser；
The second collimation unit of transmitting terminal 160, for collimating the shoot laser from the bundling device.
The distance that fibre delay line can transmit optical fiber increases or reduces, and prolongs from the time to reach output laser
Slow device.In the utility model embodiment, the delay time between any one fibre delay line and adjacent fiber delay line
Difference is：
C/ (N*f),
Wherein, c is the light velocity, and N is the item number for being emitted sub- laser, and f is the launch point frequency of semiconductor laser.
After setting the time difference, laser can be made uniformly to be emitted on test point in time.
In the utility model embodiment, fibre delay line can be numbered, respectively 1,2 ... N,
In the utility model embodiment, due to the presence of fibre delay line, N beams have the time difference between being emitted sub- laser,
It can successively be emitted on the same test point, be equivalent to the laser particle improved in the unit interval on the same test point
Number, therefore the laser radar of the utility model embodiment can improve the launch point frequency of laser radar, to improve laser thunder
The angular resolution reached.
Fig. 2 show the structural schematic diagram of the laser radar of the utility model embodiment, in laser radar shown in Fig. 2,
Including semiconductor laser 110, the first collimation unit of transmitting terminal 120, microlens array 130, fibre delay line 140, bundling device
150, the second collimation unit of transmitting terminal 160, wherein the first collimation unit of transmitting terminal 120 includes slow axis collimation unit 121 and fast axle
Collimation unit 122.
Slow axis collimation unit 121 is used to collimate the shoot laser in the slow axis of the semiconductor laser；
Fast axis collimation unit 122 is used for the shoot laser described in the fast axis collimation of the semiconductor laser.
Semiconductor laser is different in two mutually orthogonal direction angles of divergence, and the size that shines is also different, and fast axle refers to hair
The larger direction in angle is dissipated, slow axis refers to the smaller direction of the angle of divergence, it is therefore desirable to carry out collimation respectively for fast axle and slow axis
Best collimating effect can be reached.
Fig. 3 show the schematic diagram of the laser facula of the laser radar of the utility model embodiment, through slow axis collimation unit
121 and fast axis collimation unit 122 after laser facula such as Fig. 3 (a) shown in, be a strip shaped laser spot；Through microlens array 130
Shown in such as Fig. 3 (b) of laser facula afterwards, N parts have been divided into it.This N beam is emitted sub- laser by after N optical fiber delay wire delay, meeting
It is emitted to monitoring point successively, to improve the launch point frequency of laser radar.
A kind of laser radar is disclosed in the embodiments of the present invention, laser radar includes：Semiconductor laser is used for
Emit shoot laser；The first collimation unit of transmitting terminal, the shoot laser for collimating the semiconductor laser；Lenticule
Array is emitted sub- laser for the shoot laser after collimation to be divided into N beams, and the N beams is emitted sub- laser coupled and enter N items
Fibre delay line；Fibre delay line, the outgoing time for postponing the sub- laser of outgoing；Bundling device is used for optical fiber delay
The sub- laser of outgoing of line output is combined into a shoot laser；The second collimation unit of transmitting terminal comes from the bundling device for collimating
Shoot laser.In the utility model embodiment, N beams have the time difference between being emitted sub- laser, can be emitted to successively same
On a test point, it is equivalent to the laser particle number improved in the unit interval on the same test point, therefore the utility model is real
The launch point frequency of laser radar can be improved by applying the laser radar of example, to improve the angular resolution of laser radar.
Those skilled in the art can be understood that the technology in the utility model embodiment can add by software
The mode of required common hardware realizes that common hardware includes universal integrated circuit, universal cpu, general-purpose storage, universal element
Device etc., naturally it is also possible to by specialized hardware include application-specific integrated circuit, dedicated cpu, private memory, special components and parts etc.
It realizes, but the former is more preferably embodiment in many cases.Based on this understanding, the skill in the utility model embodiment
Substantially the part that contributes to existing technology can be expressed in the form of software products art scheme in other words, the calculating
Machine software product can be stored in a storage medium, as read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc, CD etc., including some instructions are used so that a computer equipment
(can be personal computer, server either network equipment etc.) executes each embodiment of the utility model or embodiment
Method described in certain parts.
Each embodiment in this specification is described in a progressive manner, identical similar portion between each embodiment
Point just to refer each other, and each embodiment focuses on the differences from other embodiments.Especially for system reality
For applying example, since it is substantially similar to the method embodiment, so description is fairly simple, related place is referring to embodiment of the method
Part explanation.
Above-described the utility model embodiment, does not constitute the restriction to scope of protection of the utility model.It is any
Modifications, equivalent substitutions and improvements made within spirit of the present utility model and principle etc., should be included in the utility model
Protection domain within.
Claims (3)
1. a kind of laser radar, which is characterized in that including：
Semiconductor laser, for emitting shoot laser；
The first collimation unit of transmitting terminal, the shoot laser for collimating the semiconductor laser；
Microlens array is emitted sub- laser for the shoot laser after collimation to be divided into N beams, and the N beams is emitted sub- laser
It is coupled into N fibre delay line；
Fibre delay line, the outgoing time for postponing the sub- laser of outgoing；
Bundling device, the sub- laser of outgoing for exporting fibre delay line are combined into a shoot laser；
The second collimation unit of transmitting terminal, for collimating the shoot laser from the bundling device.
2. laser radar as described in claim 1, which is characterized in that the first collimation unit of the transmitting terminal includes：
Slow axis collimation unit collimates the shoot laser for the slow axis in the semiconductor laser；
Fast axis collimation unit is used for the shoot laser described in the fast axis collimation of the semiconductor laser.
3. laser radar as claimed in claim 2, which is characterized in that between the fibre delay line and adjacent fiber delay line
Delay-time difference be：
C/ (N*f),
Wherein, c is the light velocity, and N is the item number for being emitted sub- laser, and f is the launch point frequency of semiconductor laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820066594.XU CN207851292U (en) | 2018-01-15 | 2018-01-15 | Laser radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820066594.XU CN207851292U (en) | 2018-01-15 | 2018-01-15 | Laser radar |
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| Publication Number | Publication Date |
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| CN207851292U true CN207851292U (en) | 2018-09-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226898A (en) * | 2018-01-15 | 2018-06-29 | 深圳市速腾聚创科技有限公司 | Laser radar and the method for improving laser radar launch point frequency |
| CN111521994A (en) * | 2020-05-13 | 2020-08-11 | 广东博智林机器人有限公司 | Method and testing device for measuring angular resolution and vertical field angle of laser radar |
-
2018
- 2018-01-15 CN CN201820066594.XU patent/CN207851292U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226898A (en) * | 2018-01-15 | 2018-06-29 | 深圳市速腾聚创科技有限公司 | Laser radar and the method for improving laser radar launch point frequency |
| CN111521994A (en) * | 2020-05-13 | 2020-08-11 | 广东博智林机器人有限公司 | Method and testing device for measuring angular resolution and vertical field angle of laser radar |
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