CN210401654U - Coaxial multiline laser radar of receiving and dispatching - Google Patents
Coaxial multiline laser radar of receiving and dispatching Download PDFInfo
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- CN210401654U CN210401654U CN201921146487.9U CN201921146487U CN210401654U CN 210401654 U CN210401654 U CN 210401654U CN 201921146487 U CN201921146487 U CN 201921146487U CN 210401654 U CN210401654 U CN 210401654U
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Abstract
The utility model discloses a coaxial multi-line laser radar of receiving and dispatching, include: the optical fiber ring oscillator comprises a transmitting module, an optical fiber coupler, an optical fiber circulator, a transmitting and receiving lens, a receiving module, a two-dimensional MEMS (micro-electromechanical systems) galvanometer and a control module, wherein a transmitting light source is arranged inside the transmitting module and is coupled into the optical fiber through the optical fiber coupler, the optical fiber circulator consists of a crystal and a polarizing device and is connected with the optical fiber, the transmitting and receiving lens is aligned to the two-dimensional MEMS galvanometer inclined at 45 degrees, and the MEMS galvanometer vibrates to scan so as to transmit the light source. The utility model provides a radar compact structure, transmission and receiving use same light path, have reduced the emission source and have received the detector, and the cost is reduced, and it is convenient to install and transfer simultaneously.
Description
Technical Field
The utility model belongs to the technical field of laser rangefinder, in particular to coaxial multi-line laser radar of receiving and dispatching.
Background
The laser scanning range radar can be used for detecting the position, the outline and the speed of a target, gradually expands the application field of the laser range radar, accurately measures, navigates and positions, safely avoids barriers and starts to be applied to the unmanned technology, and the laser scanning radar forms a scanning cross section by scanning and emitting emitted laser beams so as to test the characteristic information of an object to be tested. The three-dimensional scanning laser radar is in multilayer scanning in the vertical direction, can well reflect the characteristic information of an object to be detected, and is suitable for multiple fields such as unmanned navigation and shape contour detection.
The existing three-dimensional scanning laser radar mostly adopts a multi-line scanning mode, namely, a plurality of laser tubes are used for transmitting in sequence, the structure is that the plurality of laser tubes are longitudinally arranged, a certain included angle is formed between every two laser tubes, the vertical transmitting view field is 30-40 degrees, a receiving module receives at a corresponding angle, each receiving detector corresponds to a transmitting angle, the structure is that the receiving module and the transmitting module are symmetrically arranged at two sides, a reflector is used for turning a light path inside, then three-dimensional scanning ranging is realized by rotating in the horizontal direction, scanning test information is quickly obtained to meet the requirement, more characteristic information is collected to improve dot matrix pixels, the multi-line laser radar controls a plurality of transmitting diodes to transmit in sequence in the vertical direction, and meanwhile, the receiving detectors with the same number are installed corresponding to the plurality of transmitting diodes to cause the increase of the volume in the, the power dissipation is improved, wireless power supply and wireless transmission are needed, the cost is high, and the development of the multi-line laser radar is restricted.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art not enough, provide a coaxial multi-line laser radar of receiving and dispatching.
The technical scheme is as follows:
a transmit-receive coaxial multiline lidar comprising: the optical fiber vibration device comprises a transmitting module, an optical fiber coupler, an optical fiber circulator, a transmitting and receiving lens, a receiving module, a two-dimensional MEMS (micro-electromechanical systems) galvanometer and a control module, and is characterized in that a transmitting light source is arranged inside the transmitting module and is coupled into the optical fiber through the optical fiber coupler, the optical fiber circulator consists of a crystal and a polarizing device and is connected with the optical fiber, the transmitting and receiving lens is aligned to the two-dimensional MEMS galvanometer inclined at 45 degrees, and the MEMS galvanometer vibrates to scan and transmits the light source.
Specifically, the light source is any one of a semiconductor laser, a solid laser, or a fiber laser.
A light source in the transmitting module is coupled into an optical fiber through an optical fiber coupler, and is irradiated onto the two-dimensional MEMS galvanometer through shaping of the transmitting and receiving lens to be scanned and transmitted through the optical fiber circulator, and meanwhile, the transmitting and receiving lens receives a signal returned by the two-dimensional MEMS galvanometer into the optical fiber, and then the signal is received by the receiving detector through the optical fiber circulator to generate a signal. The control module controls the two-dimensional MEMS galvanometer to scan, and simultaneously obtains angle information and distance information to output three-dimensional point cloud data. The radar has a compact structure, uses the same light path for transmitting and receiving, reduces a transmitting source and a receiving detector, reduces the cost, and is convenient to install and adjust.
Drawings
Fig. 1 is a schematic structural diagram of a transmitting-receiving coaxial multiline lidar, wherein arrows represent schematic optical paths.
Description of reference numerals:
the system comprises a transmitting module 1, an optical fiber 2, an optical fiber 3, an optical fiber circulator 4, a transmitting and receiving lens 5, a receiving module 6, a two-dimensional MEMS galvanometer 7 and a control module 7.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention provides a coaxial multiline lidar for transmitting and receiving signals, which is described in detail below with reference to the following embodiments. The following examples are intended to illustrate the invention and are not intended to limit the scope of the invention.
Example 1
Fig. 1 is a schematic structural diagram of a transmitting-receiving coaxial multiline lidar, which includes: the device comprises a transmitting module 1, an optical fiber 2, an optical fiber coupler, an optical fiber circulator 3, a transmitting and receiving lens 4, a receiving module 5, a two-dimensional MEMS galvanometer 6 and a control module 7.
The transmitting module 1 is internally provided with a transmitting light source which can be any one of a semiconductor laser, a solid laser or a fiber laser and is coupled into the optical fiber 2 through a fiber coupler. The optical fiber circulator 3 connected with the optical fiber 2 consists of a crystal and a polarization device, so that emitted light is converted into polarized light to be directionally transmitted along the optical fiber 2, and received light can be transmitted along the opposite direction of the emitted light without mutual interference. The emitted light is collimated through the transmitting and receiving lens 4, the transmitting and receiving lens 4 is aligned with the two-dimensional MEMS galvanometer 6 inclined at 45 degrees, and the MEMS galvanometer vibrates to scan and emit a light source. The two-dimensional MEMS galvanometer 6 simultaneously reflects the received echo back to the transmitting and receiving lens 4 for receiving, and transmits the received echo to a receiving detector of the receiving module 5 through the optical fiber 2 and the optical fiber circulator 3 which are the same as the transmitting echo. The control module 7 controls the two-dimensional MEMS galvanometer 6 to scan and transmit the information by the transmitting module 1, and the information received by the receiving module 5 is processed to obtain angle information and distance information to output three-dimensional point cloud data.
The arrows in fig. 1 represent schematic light paths. A light source in the transmitting module 1 is coupled into an optical fiber 2 through an optical fiber coupler, passes through an optical fiber circulator 3, is shaped through a transmitting and receiving lens 4 and irradiates on a two-dimensional MEMS (micro-electromechanical system) galvanometer 6 for scanning and transmitting, and meanwhile, the transmitting and receiving lens 4 receives a signal returned by the two-dimensional MEMS galvanometer 6 into the optical fiber 2, and then the signal is received by a receiving detector through the optical fiber circulator 3 to generate a signal. The control module 7 controls the two-dimensional MEMS galvanometer 6 to scan, and simultaneously obtains angle information and distance information to output three-dimensional point cloud data. The radar has a compact structure, uses the same light path for transmitting and receiving, reduces a transmitting source and a receiving detector, reduces the cost, and is convenient to install and adjust.
The present invention is not limited to the above-described examples, and various changes can be made without departing from the spirit of the present invention within the knowledge range of those skilled in the art.
Claims (2)
1. A transmit-receive coaxial multiline lidar comprising: the device comprises a transmitting module, an optical fiber coupler, an optical fiber circulator, a transmitting and receiving lens, a receiving module, a two-dimensional MEMS galvanometer and a control module, and is characterized in that a transmitting light source is arranged in the transmitting module, the optical fiber circulator consists of a crystal and a polarizing device and is connected with the optical fiber, the transmitting and receiving lens is aligned to the two-dimensional MEMS galvanometer inclined at 45 degrees, the MEMS galvanometer vibrates to scan and transmit the light source, the light source in the transmitting module is coupled into the optical fiber through the optical fiber coupler, and is shaped through the transmitting and receiving lens to irradiate the two-dimensional MEMS galvanometer to scan and transmit, and meanwhile, the transmitting and receiving lens receives a signal returned by the two-dimensional MEMS galvanometer into the optical fiber and then is received by a receiving detector through the optical fiber circulator to generate.
2. The transmit-receive coaxial multiline lidar of claim 1 wherein the light source is any one of a semiconductor laser, a solid-state laser or a fiber laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921146487.9U CN210401654U (en) | 2019-07-22 | 2019-07-22 | Coaxial multiline laser radar of receiving and dispatching |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921146487.9U CN210401654U (en) | 2019-07-22 | 2019-07-22 | Coaxial multiline laser radar of receiving and dispatching |
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| CN210401654U true CN210401654U (en) | 2020-04-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261844A (en) * | 2019-07-22 | 2019-09-20 | 北京因泰立科技有限公司 | It is a kind of to receive and dispatch coaxial multi-line laser radar |
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2019
- 2019-07-22 CN CN201921146487.9U patent/CN210401654U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261844A (en) * | 2019-07-22 | 2019-09-20 | 北京因泰立科技有限公司 | It is a kind of to receive and dispatch coaxial multi-line laser radar |
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