CN218886154U

CN218886154U - Laser cloud detection radar

Info

Publication number: CN218886154U
Application number: CN202223048197.5U
Authority: CN
Inventors: 李启坤; 霍鹏飞; 徐梓毅; 黄志红
Original assignee: Nanjing Xinhuan Photoelectric Technology Co ltd
Current assignee: Nanjing Xinhuan Photoelectric Technology Co ltd
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2023-04-18
Anticipated expiration: 2032-11-16

Abstract

The utility model discloses a laser cloud-finding radar, which comprises a telescope component, wherein the bottom end of the telescope component is provided with a successor light path component, the bottom of the front surface of the telescope component is provided with a laser transmitter, and the middle position of the front surface of the telescope component is provided with a coated high-reflection lens and a coated full-reflection lens; the top of the front surface of the telescope component is provided with an optical wedge component. The utility model constructs the receiving system composed of the telescope component and the subsequent light path component, and the transmitting light path is completely arranged on the receiving system shell, so that the stability of the optical-mechanical system under high and low temperature and vibration environment is higher, and the environmental adaptability is stronger; through the optical wedge component arranged on the transmitting optical path, the convenient adjustment of the parallelism of the receiving and transmitting shafts of the system is realized, and meanwhile, the requirements on the structure processing precision and the difficulty of installation and adjustment are also reduced.

Description

Laser cloud detection radar

Technical Field

The utility model relates to a laser radar technical field particularly, relates to a laser cloud detection radar.

Background

The existing laser cloud detection radar has the main problems of insufficient system stability and environmental adaptability, large volume, heavy weight and high requirements on production, processing, assembly and adjustment processes, increases the cost, and brings inconvenience for transportation, installation, use and maintenance, thereby reducing the social and economic benefits of products.

For example, chinese patent No. CN102928831B discloses a laser measurement optical-mechanical system, which adopts a modular assembly structure, a collimating lens in a laser emitting assembly collimates laser emitted from a pulse semiconductor laser diode into parallel light, the parallel light is transmitted from a hollow portion of a hollow reflector to a telescope assembly, and the telescope assembly expands the beam of the parallel light and compresses a divergence angle. And the laser echo received by the telescope assembly is also a parallel beam. Therefore, the light paths among the laser emission assembly, the laser reflection assembly, the telescope assembly and the laser detection assembly are parallel light paths, so that the requirement on the adjustment accuracy among the assemblies in the optical-mechanical system is lowered, and the assemblies of the optical-mechanical system can be installed or replaced without accurate measurement and positioning through the installation interfaces which are respectively connected with the laser emission assembly, the telescope assembly and the laser detection assembly in the connecting device of the laser reflection assembly. Thereby facilitating the installation and maintenance of the laser measuring optical-mechanical system.

However, the laser system still has certain defects, such as the defects of complex manufacturing and adjusting process of the hollow reflector and cost performance brought by high requirements; in addition, the hollow reflector occupies a part of the signal receiving area due to the emitted light, so that the signal-to-noise ratio of the system is reduced, the detection performance is lost, and the detection efficiency is reduced.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

To the problem in the correlation technique, the utility model provides a laser cloud finding radar to overcome the above-mentioned technical problem that current correlation technique exists.

Therefore, the utility model discloses a specific technical scheme as follows:

a laser cloud-measuring radar comprises a telescope component, wherein a successor light path component is arranged at the bottom end of the telescope component, a laser transmitter is arranged at the bottom of the front surface of the telescope component, and a coated high-reflection lens and a coated total-reflection lens are arranged in the middle of the front surface of the telescope component; the top of the front surface of the telescope component is provided with an optical wedge component.

Furthermore, in order to realize that the telescope cylinder is used as a carrier of the whole laser emission system and improve the compact structure degree and the stability, the telescope component comprises the telescope cylinder, and a lens is arranged at the top in the telescope cylinder.

Furthermore, in order to construct a whole set of light path reflection propagation line, namely, the path of laser is changed through the action of two groups of reflectors, the collection and control of laser signals are realized, the laser transmitter is positioned on one side of the front bottom of the telescope barrel, the coated high-reflection lens is positioned right above the laser transmitter, the coated full-reflection lens is positioned on one side of the coated high-reflection lens and positioned at the same height, the optical wedge assembly is positioned right above the coated full-reflection lens, an included angle is formed between the mirror surface of the coated high-reflection lens and the laser transmitter transmission line, and the coated full-reflection lens and the coated high-reflection lens are kept parallel.

Furthermore, in order to realize the detection and the reception of laser in the air and finally convert an optical signal into an electric signal, the subsequent optical path component comprises an optical path shell positioned at the center of the bottom end of the telescope cylinder, a photoelectric detector is arranged at the bottom inside the optical path shell, and a focusing lens, a filter lens, a collimating lens and a small-hole diaphragm are sequentially arranged in the optical path shell from top to bottom through the photoelectric detector.

Furthermore, in order to adjust the light beam, enlarge the directive control range of light beam to make the transmission beam parallel with receiving system optical axis, the optical wedge subassembly is including setting up at the positive mirror holder of telescope barrel, and the bottom all is provided with rotatory mirror holder with interior top in the mirror holder, the inside coating film optical wedge lens that is provided with of rotatory mirror holder, and the mirror holder both sides all are provided with and rotate mirror holder matched with locking screw.

The utility model has the advantages that:

1. by constructing a receiving system consisting of the telescope component and the subsequent light path component and completely installing the transmitting light path on the receiving system outer shell, the optical mechanical system under high and low temperature and vibration environments has higher stability and stronger environmental adaptability.

2. Through the optical wedge component arranged on the transmitting optical path, the convenient adjustment of the parallelism of the receiving and transmitting shafts of the system is realized, and meanwhile, the requirements on the structure processing precision and the difficulty of installation and adjustment are also reduced.

3. Through reasonable design and component distribution layout, the whole structure of the optical-mechanical system is more compact, and the miniaturization and the light weight of the laser cloud-measuring radar system can be realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a three-dimensional structure of a laser cloud radar according to an embodiment of the present invention;

fig. 2 is a second schematic perspective view of a laser cloud radar according to an embodiment of the present invention;

fig. 3 is a schematic front view of a laser cloud radar according to an embodiment of the present invention;

fig. 4 is a top view of a laser cloud radar according to an embodiment of the present invention;

fig. 5 is a side cross-sectional view of a laser cloud radar according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an optical wedge assembly in a laser cloud radar according to an embodiment of the present invention;

fig. 7 is a partially enlarged view of a portion a in fig. 5.

In the figure:

1. a telescope assembly; 101. a telescope cylinder; 102. a lens; 2. a subsequent optical path component; 201. a light path housing; 202. a photodetector; 203. a focusing mirror; 204. a filter; 205. a collimating mirror; 206. a small aperture diaphragm; 3. a laser transmitter; 4. coating a film on the high-reflection lens; 5. coating a film on the full-reflection lens; 6. an optical wedge assembly; 601. a frame; 602. rotating the mirror frame; 603. coating a film optical wedge lens; 604. and locking the screw.

Detailed Description

For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.

According to the utility model discloses an embodiment provides a laser cloud radar.

Referring now to the drawings and the detailed description, as shown in fig. 1-7, the laser cloud radar according to the embodiment of the present invention comprises a telescope assembly 1, wherein a subsequent light path assembly 2 is arranged at the bottom end of the telescope assembly 1, a laser emitter 3 is arranged at the bottom of the front surface of the telescope assembly 1, and a coated high-reflection lens 4 and a coated full-reflection lens 5 are arranged at the middle position of the front surface of the telescope assembly 1; the top of the front surface of the telescope component 1 is provided with an optical wedge component 6.

By means of the technical scheme, the receiving system composed of the telescope component 1 and the subsequent light path component 2 is constructed, and the transmitting light paths are all arranged on the receiving system outer shell, so that the optical mechanical system under high and low temperature and vibration environments is higher in stability and stronger in environmental adaptability. Through the optical wedge assembly 6 arranged on the transmitting light path, the parallelism of a receiving and transmitting shaft of the system can be conveniently adjusted, and meanwhile, the requirements on the structure processing precision and the difficulty in installation and adjustment are also reduced. Through reasonable design and component distribution layout, the whole structure of the optical-mechanical system is more compact, and the miniaturization and the light weight of the laser cloud-measuring radar system can be realized.

In one embodiment, for the telescope assembly 1, the telescope assembly 1 comprises a telescope cylinder 101, and a lens 102 is arranged at the top inside the telescope cylinder 101, so that the telescope cylinder 101 is used as a carrier of the whole laser emission system, and the compactness and the stability are improved.

In one embodiment, for the above laser transmitter 3, the laser transmitter 3 is located on one side of the bottom of the front surface of the telescope barrel 101, the coated high-reflection lens 4 is located directly above the laser transmitter 3, the coated fully-reflective lens 5 is located on one side of the coated high-reflection lens 4 and is located at the same height, the optical wedge assembly 6 is located directly above the coated fully-reflective lens 5, an included angle of 45 ° is formed between the mirror surface of the coated high-reflection lens 4 and the transmission line of the laser transmitter 3, and the coated fully-reflective lens 5 and the coated high-reflection lens 4 are kept parallel, so as to construct a whole set of light path reflection transmission line, that is, the path of laser light is changed through the action of the two sets of reflectors, thereby realizing the collection and control of laser signals.

In one embodiment, for the subsequent optical path component 2, the subsequent optical path component 2 includes an optical path housing 201 located at the bottom center position of the telescope barrel 101, a photoelectric detector 202 is disposed at the bottom inside the optical path housing 201, and a focusing mirror 203, a filter 204, a collimating mirror 205 and an aperture stop 206 are sequentially disposed inside the optical path housing 201 from the photoelectric detector 202 to the top, so as to detect and receive laser light in the air, and finally convert an optical signal into an electrical signal.

In an embodiment, for the optical wedge assembly 6, the optical wedge assembly 6 includes a frame 601 disposed on the front surface of the telescope body 101, a rotating frame 602 is disposed on the bottom and the top of the frame 601, a coated optical wedge lens 603 is disposed inside the rotating frame 602, and locking screws 604 matched with the rotating frame 602 are disposed on both sides of the frame 601, so as to adjust the light beam, enlarge the adjustment range of the light beam direction, and make the emitted light beam parallel to the optical axis of the receiving system.

For the convenience of understanding the technical solution of the present invention, the following detailed description is made on the working principle or the operation mode of the present invention in the practical process.

In practical application, the telescope component 1 and the subsequent optical path component 2 form a receiving system of a radar, and the device on the surface of the telescope cylinder 101 forms a transmitting system of the radar, and in the practical operation process: firstly, a laser emitter 3 is used for emitting detection laser, the laser emitter 3 is a passive Q-switched laser, the divergence angle is smaller than or equal to 0.2mrad after collimation and beam expansion, the detection laser sequentially passes through a coated high-reflection lens 4 (mainly reflects the laser emitted by the laser emitter 3, and simultaneously penetrates a small part of the laser to be used for signal acquisition and control of the laser) and a coated full-reflection lens 5 for reflection, and finally, the detection laser is emitted on a lens of an optical wedge component 6 (composed of 1

lens frame

601, 2 rotating lens frames 602, 2 coated optical wedge lenses 603 with the diameter of 1 inch and 2 locking screws 604).

The coated optical wedge lens 603 is installed in the installation groove of the rotating mirror bracket 602 and fixed into a whole through optical adhesive, then the coated optical wedge lens is installed on one side of the mirror bracket 601, the coated optical wedge lens 603 is driven to rotate through the rotating mirror bracket 602 so as to adjust the polarization state of the light beam and further realize the adjustment of the light beam direction, and finally the rotating mirror bracket 602 is fixed through the locking screw 604 so as to fix the coated optical wedge lens 603; another set of the same coated wedge optics 603 is mounted on the other side of the frame 601 to expand the adjustment range of the beam pointing direction.

When the emitted laser meets cloud layers in the air to generate backscatter signals, the signal light is transmitted back to a receiving system, the lens 102 focuses the signal light to a small hole of the small-hole diaphragm 206, the small hole of the small-hole diaphragm 206 is used for limiting a receiving field angle, the return light signal penetrating through the small-hole diaphragm 206 is collimated by the collimating mirror 205, unnecessary light signals are filtered by the optical filter 204 and then focused to a receiving surface of the photoelectric detector 202 by the focusing mirror 203, and finally the return light signal is converted into an electric signal.

To sum up, with the help of the utility model discloses an above-mentioned technical scheme is through founding the receiving system who constitutes based on telescope subassembly 1 and successor light path subassembly 2 to all install the transmission light path on the receiving system shell body, make the ray apparatus system stability under high low temperature and the vibration environment higher, environmental suitability is stronger. Through the optical wedge assembly 6 arranged on the transmitting light path, the parallelism of a receiving and transmitting shaft of the system can be conveniently adjusted, and meanwhile, the requirements on the structure processing precision and the difficulty in installation and adjustment are also reduced. Through reasonable design and component distribution layout, the whole structure of the optical-mechanical system is more compact, and the miniaturization and the light weight of the laser cloud-measuring radar system can be realized.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser cloud-finding radar comprises a telescope component (1) and is characterized in that,

a subsequent light path component (2) is arranged at the bottom end of the telescope component (1), a laser emitter (3) is arranged at the bottom of the front surface of the telescope component (1), and a coated high-reflectivity lens (4) and a coated total-reflectivity lens (5) are arranged in the middle of the front surface of the telescope component (1);

and the top of the front surface of the telescope component (1) is provided with an optical wedge component (6).

2. A lidar according to claim 1, wherein the telescope assembly (1) comprises a telescope barrel (101), and the telescope barrel (101) is provided with a lens (102) at the inner top.

3. The lidar of claim 2, wherein the laser transmitter (3) is located at the bottom side of the front surface of the telescope cylinder (101), the coated high-reflectivity lens (4) is located right above the laser transmitter (3), the coated fully-reflective lens (5) is located at the same height as the coated high-reflectivity lens (4), and the optical wedge assembly (6) is located right above the coated fully-reflective lens (5).

4. The lidar of claim 3, wherein the mirror surface of the coated highly reflective mirror (4) forms an angle of 45 ° with the transmission line of the laser transmitter (3), and the coated highly reflective mirror (5) and the coated highly reflective mirror (4) are parallel.

5. The laser cloud radar according to claim 2, wherein the subsequent light path component (2) comprises a light path housing (201) located at the bottom center position of the telescope cylinder (101), a photoelectric detector (202) is arranged at the bottom in the light path housing (201), and a focusing mirror (203), a filter (204), a collimating mirror (205) and an aperture stop (206) are sequentially arranged in the light path housing (201) from the photoelectric detector (202) to the top.

6. The lidar according to claim 3, wherein the optical wedge assembly (6) comprises a frame (601) disposed on the front surface of the telescope cylinder (101), the frame (601) is provided with a rotating frame (602) at the bottom and the top, the rotating frame (602) is provided with a coated optical wedge lens (603) inside, and the frame (601) is provided with locking screws (604) at both sides for matching with the rotating frame (602).