CN217846640U

CN217846640U - Laser radar system for atmospheric detection

Info

Publication number: CN217846640U
Application number: CN202221642569.4U
Authority: CN
Inventors: 况志强; 刘�东; 汤兢业; 刘本利; 王来彬
Original assignee: Hefei Institute Of Technology Innovation Engineering
Current assignee: Hefei Institute Of Technology Innovation Engineering
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-11-18
Anticipated expiration: 2032-06-28

Abstract

The utility model belongs to the technical field of laser radar, in particular to an atmosphere detection laser radar system, which comprises a signal processing unit, and a laser transmitting unit, a laser receiving unit and a laser debugging unit which are connected with corresponding ports of the signal processing unit; the laser receiving unit is used for receiving the light beam emitted into the atmosphere by the laser emitting unit; the laser emission unit comprises a laser light source, a color separation sheet and a full-return mirror which are sequentially arranged according to a light path; the laser debugging unit comprises an indicating light source and a second reflecting mirror which are arranged according to a light path, and further comprises a small-hole diaphragm assembly arranged behind the total-return mirror, wherein light beams reflected by the second reflecting mirror are incident on the total-return mirror after passing through a color separation sheet and then are reflected by the small-hole diaphragm assembly; and the signal processing unit is connected with a controlled end of an indicating light source in the laser debugging unit. The utility model provides a can assist outfield fortune dimension personnel quick adjustment atmosphere to survey the laser radar light path, realize the scheme that laser radar detection performance optimizes.

Description

Laser radar system for atmospheric detection

Technical Field

The utility model belongs to the technical field of laser radar, especially, relate to an atmosphere detection laser radar system.

Background

Laser has been widely applied to various fields since the advent of laser, researchers in the united states have successfully developed a laser radar for atmospheric stratosphere detection in 1963, and after 3 years, china has also developed a ruby laser radar, and since 1970, the laser radar technology has been used to effectively perform detection of various atmospheric parameters, such as molecules, smoke concentration, temperature, wind speed, wind direction, water vapor content in the atmosphere, and the like, so as to achieve the purposes of monitoring the atmospheric environment and forecasting disastrous weather such as storm, sandstorm and the like.

In recent years, due to the development of laser radar technology and the growing concern of people about atmospheric environment, more and more laser radar devices are put into monitoring of atmospheric environment. At present, laser radars for atmospheric aerosol and cloud detection mainly use laser light sources with the wavelengths of 355nm, 532nm and 1064nm, laser radars for ozone and water vapor detection mainly use laser light sources with ultraviolet wave bands, laser radars for wind speed and wind direction detection and greenhouse gas detection mainly use laser light sources with near infrared and intermediate infrared wave bands, and except for the aerosol and cloud detection laser radars which are mature at present and use the wavelength of 532nm, other laser light sources invisible to human eyes are used.

The laser radar is in transportation or long-term work back because its transmission optical axis deviates from the design position with receiving optical axis because of vibrations, temperature variation etc. and leads to unable accurate detection atmospheric signal, and maintainer can only blindly adjust the first speculum of transmitting unit owing to can't see the laser beam of transmission, need consume very long time under this kind of mode, and inefficiency, and in case the skew angle of transmission laser is great, probably can't adjust back to original state, has restricted laser radar's business and has used. Meanwhile, because the energy of the laser light source used by the laser radar is large, the laser radar cannot judge whether the laser emits light through human eyes in the maintenance and operation processes, and the laser radar is very easy to cause physical damage to workers, particularly human eyes.

SUMMERY OF THE UTILITY MODEL

In order to indicate the position and the light emitting state of invisible laser of human eyes, the damage of a laser radar to human bodies, particularly human eyes, is reduced, the dimming efficiency of maintenance personnel is improved, and the business application capability of the laser radar equipment is improved. The utility model provides an atmosphere detection laser radar system, concrete technical scheme is as follows:

an atmosphere detection laser radar system comprises a signal processing unit, and a laser transmitting unit, a laser receiving unit and a laser debugging unit which are connected with corresponding ports of the signal processing unit;

the laser receiving unit is used for receiving the light beam emitted into the atmosphere by the laser emitting unit;

the laser emission unit comprises a laser light source, a color separation sheet and a full-return mirror which are sequentially arranged according to a light path;

the laser debugging unit comprises an indicating light source and a second reflector which are arranged according to a light path, and further comprises a small-hole diaphragm assembly arranged behind the full-return mirror, and a light beam reflected by the second reflector is incident on the full-return mirror after passing through a color separation sheet and then is reflected by the small-hole diaphragm assembly; and the signal processing unit is connected with a controlled end of an indicating light source in the laser debugging unit.

Specifically, the aperture diaphragm assembly comprises a plurality of aperture diaphragms which are sequentially arranged in an array mode, and a diaphragm tool is formed.

Specifically, the aperture diaphragm comprises a third aperture diaphragm and a fourth aperture diaphragm which are arranged in sequence.

Specifically, the laser debugging unit further comprises a power meter, and the power meter is used for detecting laser power before and after the aperture diaphragm assembly and between adjacent aperture diaphragms in the aperture diaphragm assembly.

Specifically, the laser receiving unit comprises a receiving telescope, a first small hole diaphragm, a dimming component and a detector which are sequentially arranged according to a light path, and a signal end of the detector is connected with a corresponding port of the signal processing unit.

Specifically, the light-adjusting component comprises a collimating mirror, a first reflecting mirror, a light filter and a converging lens which are sequentially arranged along a light path.

Specifically speaking, including collector and industrial computer, the collector gathers in the detector signal and sends to the industrial computer, the industrial computer is connected with the laser light source of laser emission unit.

The utility model has the advantages of:

(1) The utility model provides a can assist outfield fortune dimension personnel rapid adjustment atmosphere detection laser radar light path, realize the scheme of laser radar detection performance optimization.

(2) The small-hole diaphragm assembly is used as a diaphragm tool, can be installed on equipment without being used as an auxiliary part for adjusting the equipment, and therefore the cost of the equipment is reduced.

(3) According to the method, the visible light is used, and the laser optical axis and the indicating light optical axis are superposed, so that a worker can adjust the laser optical axis better and faster.

Drawings

Fig. 1 is a system configuration diagram.

Fig. 2 is a structural view of a laser debugging unit portion.

Fig. 3 is a flow chart of a method.

In the figure:

1. a receiving telescope; 2. a first aperture diaphragm; 3. a collimating mirror; 4. a first reflector; 5. an optical filter; 6. a converging lens; 7. a detector; 8. a collector; 9. an industrial personal computer; 10. a laser light source; 11. an indicating light source; 12. a full return mirror; 13. color separation sheets; 14. a second reflector; 15. an indicator light axis; 16. a laser optical axis; 17. a third aperture diaphragm; 18. and a fourth aperture stop.

Detailed Description

As shown in fig. 1-2, an atmospheric sounding lidar system includes a laser emitting unit, a laser receiving unit, a signal processing unit, and a laser debugging unit;

the laser emission unit comprises a laser light source 10, a color separation sheet 13 and a full-return mirror 12 which are sequentially arranged according to a light path, and a controlled end of the laser light source 10, which is used for emitting laser, is connected with a corresponding port of the signal processing unit.

The laser receiving unit comprises a receiving telescope 1, a first small-hole diaphragm 2, a collimating mirror 3, a first reflecting mirror 4, an optical filter 5, a converging lens 6 and a detector 7 which are sequentially arranged according to a light path, and a signal end of the detector 7 is connected with a corresponding port of the signal processing unit.

The signal processing unit comprises a collector 8 and an industrial personal computer 9, the collector 8 collects signals of the detector 7 and sends the signals to the industrial personal computer 9, and the industrial personal computer 9 is connected with a laser light source 10 of the laser emitting unit.

The laser debugging unit comprises an indicating light source 11 and a second reflecting mirror 14 which are arranged according to a light path, and further comprises a small-hole diaphragm assembly arranged behind a full-return mirror 12, light beams reflected by the second reflecting mirror 14 are incident on the full-return mirror 12 after passing through a color separation sheet 13, and then are reflected by the small-hole diaphragm assembly, the small-hole diaphragm assembly comprises a plurality of small-hole diaphragms which are sequentially arranged, in the scheme, the laser debugging unit comprises a third small-hole diaphragm 17 and a fourth small-hole diaphragm 18, and the sizes of the third small-hole diaphragm 17 and the fourth small-hole diaphragm 18 are consistent with the size of laser beams. The aperture diaphragm assembly is a diaphragm tool, the laser debugging unit comprises a power meter, and the power meter is used for detecting laser power between the front and back of the aperture diaphragm assembly and adjacent aperture diaphragms in the aperture diaphragm assembly.

As shown in fig. 3, the method for debugging the atmospheric sounding lidar system includes the following steps:

s0, setting before delivery; opening the system, enabling the laser to emit laser beams, placing the small-hole diaphragm assembly at a set position, detecting laser power at a corresponding position between the front end and the rear end of the small-hole diaphragm assembly and between two adjacent small-hole diaphragms by using a laser power meter, and adjusting the position and the angle of the total-return mirror 12 to enable the difference of the laser power at all the positions to be within a set range; turning off the laser, turning on the indicating light source 11, adjusting the angle and/or position of the second mirror 14 so that the visible light passes through the aperture stop assembly, and then fixing the second mirror 14;

s1, when equipment is influenced by an external environment, firstly, judging whether maintenance is needed, when maintenance is needed, turning on an indicating light source 11, observing indicating light by human eyes, and roughly adjusting the angle and the position of a total returning mirror 12;

the step of judging whether maintenance is needed is as follows: and turning on the laser light source 10, collecting signals, and observing whether the strength of the detection signals displayed on the industrial personal computer 9 reaches a set range.

S2, turning off the indicating light source 11, turning on the laser light source 10, and finely adjusting the angle and the position of the total returning mirror 12 through the signal intensity of the detector 7 until the signal intensity of the detector 7 reaches a set range, namely, the maintenance is finished.

According to the method, visible light is used, and the laser optical axis 16 is coincided with the indicating light optical axis 15, so that workers can adjust the laser optical axis 16 better and faster.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. An atmosphere detection laser radar system is characterized by comprising a signal processing unit, and a laser transmitting unit, a laser receiving unit and a laser debugging unit which are connected with corresponding ports of the signal processing unit;

the laser emission unit comprises a laser light source (10), a color separation sheet (13) and a total return mirror (12) which are sequentially arranged according to a light path;

the laser debugging unit comprises an indicating light source (11) and a second reflecting mirror (14) which are arranged according to a light path, and further comprises a small-hole diaphragm assembly arranged behind the total-return mirror (12), wherein light beams reflected by the second reflecting mirror (14) are incident on the total-return mirror (12) after passing through a color separation sheet (13) and then are reflected by the small-hole diaphragm assembly; the signal processing unit is connected with a controlled end of an indicating light source (11) in the laser debugging unit.

2. The atmospheric sounding lidar system of claim 1, wherein the aperture stop assembly comprises a plurality of aperture stops arranged in a sequential array and forming a stop fixture.

3. The atmospheric sounding lidar system of claim 1, wherein the aperture stop comprises a third aperture stop and a fourth aperture stop arranged in series.

4. The atmospheric sounding lidar system of claim 1, wherein the laser debugging unit further comprises a power meter for detecting laser power before and after the aperture stop assembly and between adjacent aperture stops in the aperture stop assembly.

5. The atmospheric sounding lidar system according to claim 1, wherein the laser receiving unit comprises a receiving telescope (1), a first aperture diaphragm (2), a dimming component and a detector (7) which are arranged in sequence according to an optical path, and a signal end of the detector (7) is connected with a corresponding port of the signal processing unit.

6. An atmosphere detection lidar system according to claim 5, wherein the light-adjusting component comprises a collimator (3), a first reflector (4), a filter (5) and a converging lens (6) arranged in sequence along the light path.

7. The atmosphere detection lidar system according to claim 1, characterized by comprising a collector (8) and an industrial personal computer (9), wherein the collector (8) collects the signal of the detector (7) and transmits the signal to the industrial personal computer (9), and the industrial personal computer (9) is connected with the laser light source (10) of the laser emission unit.