Carbon dioxide laser radar and ground monitoring base station

Abstract

The invention provides a carbon dioxide laser radar, which relates to the technical field of atmosphere detection and comprises a shell, a laser transmitter and a receiver. The laser transmitter is rotatably installed on the shell and comprises at least two transmission assemblies arranged side by side, each transmission assembly is suitable for emitting laser outwards, and any two adjacent transmission assemblies are constructed to be that the coverage area of the emitted laser has an overlapped first area and a non-overlapped second area; the receiver is arranged on the shell and is suitable for receiving a laser signal generated by the action of the laser and the atmosphere outside the shell; wherein the receiver obtains the long-distance carbon dioxide concentration according to the laser signal of the first area, and obtains the short-distance carbon dioxide concentration according to the laser signal of the second area, so that the laser coverage range and the detection precision are improved. The invention also provides a ground monitoring base station.

Description

Technical Field

[0001] The present invention relates to the technical field of atmospheric detection, and particularly to a carbon dioxide lidar and a ground monitoring base station. Background Art

[0002] As a high-precision radar device, lidar can exhibit excellent detection performance in a variety of complex environments due to its outstanding anti-interference ability, fast response, etc. This technology emits laser beams into the surrounding three-dimensional space and receives the echo signals reflected by objects, thereby accurately obtaining key information such as the distance and speed of the target object.

[0003] As a cutting-edge remote sensing detection tool, carbon dioxide lidar is dedicated to monitoring the distribution of carbon dioxide in the atmosphere, can perform high-precision carbon dioxide concentration measurements in a vast area, and is of great significance for deeply understanding the global climate change mechanism, evaluating the distribution of greenhouse gases, and conducting environmental monitoring.

[0004] However, in the application of existing carbon dioxide lidar technology, its laser emission and reception systems are usually fixed at specific positions and directions, resulting in limited detection areas and heights, thus affecting the detection range and detection accuracy. There is an urgent need for improvement to enhance the detection ability of carbon dioxide lidar. Summary of the Invention

[0005] To solve at least one of the technical problems in the prior art, an embodiment of the present invention provides a carbon dioxide lidar, in which the laser emitter is rotatably arranged and has at least two transmissive components arranged side by side, so that the emitted laser has an overlapping area and a non-overlapping area, improving the coverage range and detection accuracy of the laser and enhancing the detection ability.

[0006] The present invention provides a carbon dioxide lidar, including a housing, a laser emitter and a receiver. The laser emitter is rotatably installed in the housing and includes at least two transmissive components arranged side by side. Each transmissive component is adapted to emit laser light outward. Any two adjacent transmissive components are configured such that the coverage areas of the emitted laser light have an overlapping first area and a non-overlapping second area; the receiver is installed in the housing and is adapted to receive the laser signal generated by the interaction of the laser with the atmosphere outside the housing; wherein, the receiver obtains the long-distance carbon dioxide concentration based on the laser signal in the first area, and the short-distance carbon dioxide concentration based on the laser signal in the second area.

[0007] Optionally, the carbon dioxide lidar further includes a rotating base rotatably installed in the housing; and a driving component installed in the housing and adapted to drive the rotating base to rotate; wherein, the laser emitter is installed on the rotating base and rotates with the rotating base in response to the drive of the driving component to change the coverage area of the emitted laser light.

[0008] Optionally, any two adjacent transmissive components include a first light-transmitting mirror and a second light-transmitting mirror that are spaced apart in the first direction; the first light-transmitting mirror and the second light-transmitting mirror are respectively mounted on the rotating base through connecting frames, and are adapted to emit laser light in the radial direction of the rotating base; wherein, the first light-transmitting mirror and the second light-transmitting mirror are configured to have different transmission ranges, so that the coverage area of the laser light has a first area and a second area.

[0009] Optionally, the laser emitter further includes a light source, which is installed inside the housing; a light guiding component, which is adapted to guide the laser light output by the light source to the outside of the housing; a refractive mirror, which is adapted to refract a part of the laser light output from the light guiding component to the first light-transmitting mirror for emission; and a reflecting mirror, which is adapted to reflect another part of the laser light not refracted by the refractive mirror to the second light-transmitting mirror for emission; wherein, the refractive mirror and the reflecting mirror are arranged along the axis of the rotating base.

[0010] Optionally, the refractive mirror and the reflecting mirror are mounted on the rotating base through a connecting rod.

[0011] Optionally, the light guiding component includes: a connecting sleeve, which is installed on the housing; and a guiding tube, which is connected to the output end of the light source and extends through the connecting sleeve to the outside of the housing to guide the laser light output by the light source to the refractive mirror.

[0012] Optionally, the light source, the guiding tube and the connecting sleeve are coaxially arranged along the axis of the rotating base.

[0013] Optionally, the carbon dioxide lidar further includes a control unit, which is installed inside the housing and is adapted to control the laser emitter. The control unit is electrically connected to the laser emitter through a cable.

[0014] Optionally, the driving component includes a driving wheel, and the driving wheel is connected to the rotating base through a transmission belt.

[0015] On the other hand, the present invention provides a ground monitoring base station, including: a mounting bracket; a carbon dioxide lidar, which is installed on the mounting bracket; a monitor, which is installed on the mounting bracket and is communicatively connected to the carbon dioxide lidar, and is adapted to collect and process the detection results of the carbon dioxide lidar; and a power supply, which is adapted to provide electrical energy for the carbon dioxide lidar and the monitor.

[0016] According to the carbon dioxide lidar provided by the present invention, by adopting a rotatable laser emitter, and the laser emitter having at least two transmissive components arranged side by side, the improvement of the laser coverage range and detection ability is achieved. The rotating design enables the laser emitter to change the range of the emitted laser, and the transmissive components arranged side by side cause the emitted laser to form overlapping and non-overlapping regions in space, thereby increasing the detection range. The receiver respectively obtains the carbon dioxide concentration information at long distances and short distances according to the laser signals in different regions. The detection range and detection accuracy of the laser are improved, and the detection performance of the carbon dioxide lidar is enhanced. Brief Description of the Drawings

[0017] Figure 1 Shows a three-dimensional schematic diagram of a carbon dioxide lidar according to an embodiment of the present invention;

[0018] Figure 2 Shows a cross-sectional view of a carbon dioxide lidar according to an embodiment of the present invention;

[0019] Figure 3 Shows a cross-sectional view of the laser emitter of a carbon dioxide lidar according to an embodiment of the present invention;

[0020] Figure 4 Shows a partial top view of a carbon dioxide lidar according to an embodiment of the present invention;

[0021] Figure 5 Shows a schematic diagram of a ground monitoring base station according to an embodiment of the present invention.

[0022] In the said drawings, the meanings of the reference numerals are specifically as follows:

[0023] 1. Housing;

[0024] 11. Bottom plate;

[0025] 12. Transmission part;

[0026] 13. Transmission bearing;

[0027] 2. Laser emitter;

[0028] 21. First light-transmitting mirror;

[0029] 22. Second light-transmitting mirror;

[0030] 23. Connecting frame;

[0031] 24. Light source;

[0032] 25. Refractive mirror;

[0033] 26. Reflecting mirror;

[0034] 27. Connecting rod;

[0035] 28. Light guide component;

[0036] 281. Guide tube;

[0037] 282. Connecting sleeve;

[0038] 29. Connecting seat;

[0039] 3. Receiver;

[0040] 4. Rotating seat;

[0041] 5. Driving component;

[0042] 51. Driving wheel;

[0043] 52. Transmission belt;

[0044] 6. Flexible cable;

[0045] 7. Power supply;

[0046] 8. Monitor; and

[0047] 9. Mounting bracket. Detailed implementation manners

[0048] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0049] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "including", "comprising", etc. used herein indicate the presence of the described features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.

[0050] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0051] In the case of using expressions such as "at least one of A, B, and C, etc.", generally, it should be interpreted according to the meaning that those skilled in the art usually understand this expression. For example, "a system having at least one of A, B, and C" should include but not be limited to a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc. In the case of using expressions such as "at least one of A, B, or C, etc.", generally, it should be interpreted according to the meaning that those skilled in the art usually understand this expression. For example, "a system having at least one of A, B, or C" should include but not be limited to a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.

[0052] Figure 1 A three-dimensional schematic diagram of a carbon dioxide lidar according to an embodiment of the present invention is shown.

[0053] According to an embodiment of the present invention, a carbon dioxide lidar is provided, as Figure 1 shown, including a housing 1, a laser emitter 2, and a receiver 3. The laser emitter 2 is rotatably mounted on the housing 1 and includes at least two transmissive components arranged side by side. Each transmissive component is adapted to emit laser light outward. Any two adjacent transmissive components are configured such that the coverage areas of the emitted laser light have an overlapping first area and a non-overlapping second area; the receiver 3 is mounted on the housing 1 and is adapted to receive the laser signal generated by the interaction of the laser light with the atmosphere outside the housing 1; wherein, the receiver 3 obtains the long-distance carbon dioxide concentration according to the laser signal in the first area and obtains the short-distance carbon dioxide concentration according to the laser signal in the second area.

[0054] According to the above setting method, by adopting the rotatable laser emitter 2 and the laser emitter 2 having at least two transmissive components arranged side by side, the coverage range and detection ability of the laser are improved. The rotating design enables the laser emitter 2 to change the irradiation area of the emitted laser light. The transmissive components arranged side by side cause the emitted laser light to form an overlapping first area and a non-overlapping second area in space. The receiver 3 obtains the carbon dioxide concentration information at long distance and short distance respectively according to the laser signals in different areas. The detection range and detection accuracy of the laser are improved, and the detection performance of the carbon dioxide lidar is enhanced.

[0055] Specifically, based on the lidar principle, a target is detected by emitting laser pulses of a specific wavelength and receiving the reflected optical signals. In the present invention, the laser coverage areas emitted by the transmission components of the laser emitter 2 partially overlap (i.e., the first area) to increase measurement redundancy and improve data quality. Specifically, the design of the overlapping area allows the carbon dioxide lidar to perform multiple measurements in the same area to reduce random errors and improve detection accuracy. Further, advanced signal processing techniques can distinguish the laser signals in the overlapping and non-overlapping areas, and precisely control the laser emission time and the time resolution of the receiver 3, enabling precise measurement of the carbon dioxide concentration at different distances. This design can improve the measurement accuracy and allow separate monitoring of the carbon dioxide concentration at different distances.

[0056] In a schematic embodiment, as Figure 1 shown, the carbon dioxide lidar further includes a bottom plate 11. Among them, the housing 1 is configured to have a U-shaped cross-sectional structure, and the bottom plate 11 is installed at the bottom end of the housing 1 and cooperates with the housing 1 to form an accommodation space to protect the components installed inside the housing 1.

[0057] In a schematic embodiment, as Figure 1 shown, the carbon dioxide lidar further includes a rotating base 4 rotatably installed in the housing 1; and a driving assembly 5 installed in the housing 1 and adapted to drive the rotating base 4 to rotate; wherein, the laser emitter 2 is installed on the rotating base 4 and rotates with the rotating base 4 in response to the drive of the driving assembly 5 to change the coverage area of the emitted laser.

[0058] According to the above setting method, setting the driving assembly 5 and the rotatable rotating base 4 to drive the laser emitter 2 to rotate can change the coverage area of the emitted laser, so that the carbon dioxide concentration in the circumferential area of the atmospheric environment can be monitored, increasing the monitoring range of the carbon dioxide lidar, and at the same time, the monitoring area can be dynamically adjusted to efficiently monitor the carbon dioxide concentration in different areas.

[0059] In a schematic embodiment, the laser emitter 2 can rotate one week and emit laser in the radial 360° range.

[0060] In a schematic embodiment, as Figure 1 shown, the receiver 3 is installed on one side of the housing 1. Specifically, when the laser emitter 2 rotates and emits laser for different areas, the position and receiving mode of the receiver 3 remain unchanged. This setting method can enable the laser signals received by the receiver 3 to form a comparison of areas to improve the monitoring effect for different areas.

[0061] In an alternative illustrative embodiment, the receiver 3 is mounted on the side wall of the laser emitter 2 or the side wall of the rotating base 4, and the receiving path of the receiver 3 is parallel to the emission path of the laser emitter 2.

[0062] According to the above setting method, the receiver 3 can rotate with the laser emitter 2 or the rotating base 4, so that the receiving path of the receiver 3 is always parallel to the emission path of the laser emitter 2, enabling the receiver 3 to continuously receive the laser signals generated by the interaction between the laser emitted from the laser emitter 2 and the atmosphere, thereby achieving continuous monitoring. At the same time, the parallel emission and receiving paths can reduce interference from other directions, improving the purity of the laser signals and the accuracy of monitoring.

[0063] Figure 2 A cross-sectional view of a carbon dioxide lidar according to an embodiment of the present invention is shown; Figure 3 A cross-sectional view of the laser emitter of a carbon dioxide lidar according to an embodiment of the present invention is shown.

[0064] In a schematic embodiment, as Figures 1 to 3 shown, any two adjacent transmission components include a first light-transmitting mirror 21 and a second light-transmitting mirror 22 spaced apart in a first direction; the first light-transmitting mirror 21 and the second light-transmitting mirror 22 are respectively mounted on the rotating base 4 through a connecting frame 23, and are adapted to emit laser light in the radial direction of the rotating base 4; wherein, the first light-transmitting mirror 21 and the second light-transmitting mirror 22 are configured to have different transmission ranges, so that the coverage area of the laser has a first area and a second area.

[0065] Specifically, as Figure 2 and as shown in FIG. 3, the first direction is parallel to the direction of the rotation axis of the rotating base 4. Spacing the transmission components in the first direction enables the laser emitter 2 to have a large laser coverage area in the axial direction while being able to change the circumferential coverage range of the laser, further increasing the monitoring range of the carbon dioxide lidar.

[0066] Specifically, as Figure 2 and as shown in FIG. 3, one of the first light-transmitting mirror 21 and the second light-transmitting mirror 22 is a convex lens, and the other is a plane mirror, so that the laser light emitted by the first light-transmitting mirror 21 and the second light-transmitting mirror 22 has different transmission ranges, making the coverage area have an overlapping first area and a non-overlapping second area. In the overlapping first area, the laser light is emitted at different angles and directions, and the laser signals are received at the same position, enabling multiple measurements to collect more data. This redundancy helps reduce errors caused by atmospheric disturbances or other interference factors, thereby improving the monitoring accuracy.

[0067] In an alternative exemplary embodiment, both the first light-transmitting lens 21 and the second light-transmitting lens 22 are convex lenses, and it is only necessary to emit laser light in a planar shape towards the atmosphere so that the covered area has an overlapping first area and a non-overlapping second area.

[0068] In an exemplary embodiment, as Figure 2 and Figure 3 shown, the laser emitter 2 further includes a light source 24 installed inside the housing 1; a light guiding assembly 28 adapted to guide the laser light output by the light source 24 to the outside of the housing 1; a refractive mirror 25 adapted to refract a part of the laser light output from the light guiding assembly to the first light-transmitting lens 21 for emission; and a reflecting mirror 26 adapted to reflect another part of the laser light not refracted by the refractive mirror 25 to the second light-transmitting lens 22 for emission; wherein, the refractive mirror 25 and the reflecting mirror 26 are arranged along the axis of the rotating base 4.

[0069] In an exemplary embodiment, the refractive mirror 25 and the first light-transmitting lens 21 have the same horizontal height, and the reflecting mirror 26 and the second light-transmitting lens 22 have the same horizontal height.

[0070] In an exemplary embodiment, the refractive angle of the refractive mirror 25 is 90°.

[0071] In an exemplary embodiment, the refractive mirror 25 is a beam splitter adapted to split the incident laser light into two beams of laser light according to a certain ratio.

[0072] According to the above setting method, the light guiding assembly 28 is set to accurately guide the laser light output by the light source 24 to the outside of the housing 1 while ensuring the intensity of the laser light. The design of the refractive mirror 25 and the reflecting mirror 26 realizes the splitting of the laser light, and only by controlling a single light source can the first light-transmitting lens 21 and the second light-transmitting lens 22 emit laser light simultaneously, simplifying the structure of the carbon dioxide lidar and improving the controllability.

[0073] In an exemplary embodiment. As Figure 2 shown, the refractive mirror 25 and the reflecting mirror 26 are installed on the rotating base 4 through a connecting rod 27.

[0074] According to the above setting method, the refractive mirror 25 and the reflecting mirror 26 can rotate with the rotating base 4 to change the refraction and reflection paths so that the laser light can be emitted from the refractive mirror 25 and the reflecting mirror 26.

[0075] In an exemplary embodiment, as Figure 3 shown, the housing 1 includes a transmission part 12 provided at the top of the housing 1, and the transmission part 12 is configured to be annular; wherein, the rotating base 4 is installed on the circumference of the transmission part 12 through a transmission bearing 13 so that the rotating base 4 can rotate.

[0076] In an exemplary embodiment, asFigure 3 As shown, the laser emitter 2 further includes a connecting base 29, which is configured to be annular. The connecting base 29 is mounted on the rotating base 4. Among them, the connecting base 29 and the rotating base 4 are clamped at the upper and lower ends of the transmission bearing 13, so that the laser emitter 2 and the rotating base 4 can rotate through the transmission bearing 13.

[0077] According to the above setting method, the combination of the annular transmission part 12 of the housing 1 and the transmission bearing 13, and the cooperation of the annular connecting base 29 of the laser emitter 2 and the transmission bearing 13 together ensure the precise rotation of the rotating base 4, while maintaining the compact structure of the CO2 lidar.

[0078] In a schematic embodiment, as Figure 3 shown, the connecting base 29 and the rotating base 4 are connected by screws.

[0079] In a schematic embodiment, as Figure 3 shown, the refractive mirror 25 and the reflecting mirror 26 are mounted on the connecting base 29 through the connecting rod 27.

[0080] In a schematic embodiment, as Figure 3 shown, the light guide assembly 28 includes: a connecting sleeve 282, which is mounted on the housing 1; and a guiding tube 281, which is connected to the output end of the light source 24 and extends through the connecting sleeve 282 to the outside of the housing 1 to guide the laser output by the light source 24 to the refractive mirror 25.

[0081] According to the above method, the laser output by the light source 24 can be precisely guided by the guiding tube 281. The guiding tube 281 is fixed through the connecting sleeve 282 and passes through the housing 1, so that the laser is guided to the outside of the housing 1.

[0082] In a schematic embodiment, as Figure 3 shown, the light source 24, the guiding tube 281 and the connecting sleeve 282 are coaxially arranged along the axis of the rotating base 4.

[0083] Specifically, the connecting sleeve 282 is configured to be annular and sleeved inside the connecting part 12. The connecting sleeve 282 and the connecting part 12 are connected by screws.

[0084] According to the above setting method, during the transmission of the laser output by the light source 24, it can be not affected by the rotation of the rotating base 4 and the laser emitter 2, so that the laser can be accurately guided to the refractive mirror 25 and the reflecting mirror 26, and is emitted by the first lens 21 and the second lens 22 after refraction and reflection.

[0085] In a schematic embodiment, the inner circle of the guiding tube 281 is coated with a reflective layer.

[0086] In an illustrative embodiment, the carbon dioxide laser radar further includes a control unit installed inside the housing 1 and adapted to control the laser emitter 2 . The control unit is electrically connected to the laser emitter 2 via a flat cable 6 .

[0087] According to the above-mentioned setting method, the control unit is electrically connected to the laser emitter 2 through the cable 6, thereby realizing precise control and signal transmission of the laser emitter 2, and ensuring the efficient operation of the carbon dioxide laser radar and the accuracy of data collection.

[0088] In an illustrative embodiment, the control unit adopts an integrated PCB circuit board design.

[0089] Figure 4 A partial top view of a carbon dioxide laser radar according to an embodiment of the present invention is shown.

[0090] In an illustrative embodiment, Figure 2 and Figure 4 As shown, the driving assembly 5 includes a driving wheel 51 , and the driving wheel 51 is connected to the rotating seat 4 via a transmission belt 52 .

[0091] According to the above arrangement, the driving assembly 5 can effectively drive the rotating seat 4 to rotate, thereby realizing the angle adjustment and coverage change of the laser emitter 2. The transmission belt 52 is used as a connecting member to transmit the rotation force of the driving wheel 51 to the rotating seat 4, ensuring the stable transmission of the driving force and the smooth rotation of the rotating seat.

[0092] In an illustrative embodiment, the driving assembly 5 further includes a motor, and an output end of the motor is connected to the driving wheel 51 to drive the driving wheel 51 to rotate.

[0093] In an illustrative embodiment, Figure 1 As shown, the outer side walls of the driving wheel 51 and the rotating seat 4 are both provided with protruding teeth.

[0094] According to the above-mentioned configuration, the convex teeth can increase the friction between the transmission belt 52 and the outer side wall of the driving wheel 51 and the rotating seat 4, thereby preventing relative displacement from occurring and thus affecting the driving effect.

[0095] In an alternative exemplary embodiment, the laser transmitter 2 includes a plurality of light sources 24, and the output end of each light source 24 is connected to a transmission component via an optical fiber, so that the output laser is emitted through the transmission component.

[0096] According to the above-mentioned configuration, by integrating multiple light sources 24 and connecting them respectively to the transmission components, higher laser power and stronger signal strength can be provided, thereby improving the detection distance and detection accuracy; the optical fiber can ensure the stable transmission and isolation of the laser.

[0097] In an alternative illustrative embodiment, as Figure 4 shown, the housing 1 is provided with a wire hole, and the cable 6 is arranged through the wire hole to connect the laser emitter 2 and the control unit. Among them, the terminal of the cable 6 is rotationally electrically connected to the laser emitter 2.

[0098] According to the above setting method, when the laser emitter 2 rotates to change the angle, the cable 6 can still maintain stable electrical signal transmission.

[0099] Figure 5 Shows a schematic diagram of a ground monitoring base station according to an embodiment of the present invention.

[0100] According to another aspect of the embodiment of the present invention, a ground monitoring base station is provided, as Figure 5 shown, including a mounting bracket 9; a carbon dioxide lidar is installed on the mounting bracket 9; a monitor 8 is installed on the mounting bracket 9 and is communicatively connected to the carbon dioxide lidar, and is suitable for collecting and processing the detection results of the carbon dioxide lidar; and a power supply 7, which is suitable for providing electrical energy for the carbon dioxide lidar and the monitor.

[0101] Specifically, the mounting bracket 9 is installed on the ground, the housing 1 of the carbon dioxide lidar is installed at the top of the mounting bracket 9, and the carbon dioxide lidar emits laser with a specific wavelength to the atmospheric environment through the laser emitter 2. These lasers propagate in the atmosphere and interact with carbon dioxide molecules to generate laser signals. The receiver 3 receives the laser signals and converts them into electrical signals, and extracts parameters such as the concentration and distribution of carbon dioxide through signal processing technology, and then feeds these parameters back to the monitor 8. The monitor 8 is responsible for collecting and further processing and analyzing the concentration and distribution of carbon dioxide from the carbon dioxide lidar, analyzing the change trend of the atmospheric environment, and providing data support for fields such as environmental monitoring and climate change research.

[0102] In a schematic embodiment, as Figure 5 shown, the power supply 7 is a photovoltaic panel.

[0103] Those skilled in the art can understand that the features described in the various embodiments of the present invention can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features described in the various embodiments of the present invention can be combined and / or combined in various ways. All such combinations and / or combinations fall within the scope of the present invention.

[0104] The embodiments of the present invention have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although the embodiments have been described separately above, this does not mean that the measures in each embodiment cannot be used advantageously in combination. Without departing from the scope of the present invention, those skilled in the art can make various substitutions and modifications, and all such substitutions and modifications should fall within the scope of the present invention.

Claims

1. A carbon dioxide laser radar, characterized in that: include: Housing (1); A laser emitter (2) is rotatably mounted on the housing (1), comprising at least two transmission components arranged side by side, each of the transmission components being adapted to emit laser light outwardly, and any two adjacent transmission components being configured such that the coverage area of ​​the emitted laser light has a first overlapping area and a second non-overlapping area; as well as A receiver (3) mounted on the housing (1) and adapted to receive a laser signal generated by the interaction of the laser with the atmosphere outside the housing (1); The receiver (3) acquires the long-distance carbon dioxide concentration based on the laser signal in the first area, and acquires the short-distance carbon dioxide concentration based on the laser signal in the second area.

2. The carbon dioxide laser radar according to claim 1, characterized in that: Also includes: A rotating seat (4) rotatably mounted on the housing (1); as well as A driving assembly (5) is installed in the housing (1) and is suitable for driving the rotating seat (4) to rotate; The laser emitter (2) is mounted on the rotating seat (4), and rotates with the rotating seat (4) in response to the drive of the drive assembly (5), so as to change the coverage area of ​​the emitted laser.

3. The carbon dioxide laser radar according to claim 2, characterized in that: Any two adjacent transmission components comprise a first light-transmitting mirror (21) and a second light-transmitting mirror (22) arranged at an interval in a first direction; The first light-transmitting mirror (21) and the second light-transmitting mirror (22) are respectively mounted on the rotating seat (4) via a connecting frame (23), and are suitable for emitting the laser in a radial direction of the rotating seat (4); The first light-transmitting mirror (21) and the second light-transmitting mirror (22) are configured to have different transmission ranges, so that the coverage area of ​​the laser has the first area and the second area.

4. The carbon dioxide laser radar according to claim 3, characterized in that: The laser transmitter (2) further comprises: A light source (24) is installed in the housing (1); A light guide component (28), adapted to guide the laser light output by the light source (24) to the outside of the housing (1); A refracting mirror (25) adapted to refract a portion of the laser light output from the light guide component (28) to be emitted from the first light transmitting mirror (21); and A reflector (26) adapted to reflect another portion of the laser light that is not refracted by the refracting mirror (25) to the second light transmitting mirror (22) for emission; Wherein, the folding mirror (25) and the reflecting mirror (26) are arranged along the axis of the rotating seat (4).

5. The carbon dioxide laser radar according to claim 4, characterized in that: The folding mirror (25) and the reflecting mirror (26) are mounted on the rotating seat (4) via a connecting rod (27).

6. The carbon dioxide laser radar according to claim 4, characterized in that: The light guide assembly (28) comprises: A connecting sleeve (282) mounted on the housing (1); and A guide tube (281) is connected to the output end of the light source (24) and extends through the connecting sleeve (282) to the outside of the housing (1) to guide the laser output by the light source (24) to the folding mirror (25).

7. The carbon dioxide laser radar according to claim 6, characterized in that: The light source (24), the guide tube (281) and the connecting sleeve (282) are coaxially arranged along the axis of the rotating seat (4).

8. The carbon dioxide laser radar according to claim 2, characterized in that: It also comprises a control unit, which is installed inside the housing (1) and is suitable for controlling the laser emitter (2), and the control unit is electrically connected to the laser emitter (2) via a flat cable (6).

9. The carbon dioxide laser radar according to claim 2, characterized in that: The driving assembly (5) comprises a driving wheel (51), and the driving wheel (51) is connected to the rotating seat (4) via a transmission belt (52).

10. A ground monitoring base station, characterized in that: include: Mounting bracket (9) ； The carbon dioxide laser radar according to any one of claims 1 to 9, mounted on the mounting bracket (9); A monitor (8), mounted on the mounting bracket (9), in communication connection with the carbon dioxide laser radar, and adapted to collect and process detection results of the carbon dioxide laser radar; and A power supply (7) is suitable for providing electrical energy to the carbon dioxide laser radar and the monitor.

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