Calibration device for a coherent doppler wind lidar telescope

Abstract

The utility model relates to laser radar telescope calibration technical field especially, more particularly to a kind of calibration device of coherent Doppler wind lidar telescope, comprising: fiber laser, drive mechanism, focusing mirror and light spot analyzer, fiber laser is connected with the rear end of telescope, telescope is installed on drive mechanism, and it is used to adjust the position of telescope along X-axis direction, Z-axis direction, focusing mirror is located at the front side of telescope, and light spot analyzer is located at the side of focusing mirror away from telescope.The utility model adjusts the position of telescope in X-axis direction, Z-axis direction, to adapt to different caliber size telescope, so as to be able to quickly calibrate the imaging quality of different caliber size telescope, and reduce the determination error of laser radar telescope calibration, improve the accuracy of laser radar telescope calibration, provide guarantee for subsequent data accuracy and sensitivity of atmospheric wind field detection.

Description

Technical Field

[0001] This utility model relates to the field of lidar telescope calibration technology, and in particular to a calibration device for a coherent Doppler wind-measuring lidar telescope. Background Technology

[0002] Precise measurement of atmospheric wind fields can greatly benefit human production and daily life, effectively reducing the occurrence of various disasters. Differences in telescope aperture and focal length directly affect the detection performance of lidar, as the wind field levels measured vary. Upper-level atmospheric wind fields have a significant impact on space science experiments, aerospace safety, and medium- to long-term weather forecasting; middle-level atmospheric wind fields significantly influence weather and climate, atmospheric dynamics, and atmospheric circulation; and lower-level atmospheric wind fields significantly affect aircraft and drone flights, typhoon paths, and short-term weather forecasting. Compared to Doppler wind-measuring acoustic radar and microwave radar, coherent Doppler wind-measuring lidar boasts advantages such as high detection accuracy, fast response speed, and wide measurement range. The telescope is the most crucial component, and its calibration accuracy directly affects the detection results. Therefore, we urgently need a calibration device for coherent Doppler wind-measuring lidar telescopes.

[0003] Currently, the calibration of lidar telescopes includes the following methods: 1. The star spot method requires the use of a light source of appropriate size to observe the size and energy distribution of the diffuse spot after the optical system images to evaluate the imaging quality. This method is relatively difficult to subjectively judge the imaging quality of a spot of a few micrometers. 2. Wave phase difference method: This method requires the use of an interferometer to measure the deviation between the actual wavefront and the ideal wavefront of the telescope. The operating conditions are harsh, and it must be in a stable environment with vibration isolation and temperature control. Moreover, the interferometer is expensive and has strict calibration requirements. Even a small mistake can lead to measurement error. 3. Target imaging method: This method is generally applicable to telescope systems with a large field of view and large aperture. The imaging quality is judged by subjective evaluation of the clarity of the image, which has a high probability of misjudgment due to subjective factors. Utility Model Content

[0004] The technical problem this invention aims to solve is: to address the issue that existing lidar telescope calibration devices cannot match telescopes of various aperture sizes and have large judgment errors. This invention provides a calibration device for a coherent Doppler wind-measuring lidar telescope. By improving the structure of the lidar telescope calibration device, it can adapt to telescopes of different aperture sizes, reduce the judgment error in lidar telescope calibration, and improve the accuracy of lidar telescope calibration.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a calibration device for a coherent Doppler wind lidar telescope, comprising: a fiber laser, a driving mechanism, a focusing lens, and a spot analyzer. The fiber laser is connected to the rear end of the telescope and is used to emit a light spot of the actual wavelength used by the telescope. The telescope is mounted on the driving mechanism and is used to adjust the position of the telescope along the X-axis and Z-axis. The focusing lens is located on the front side of the telescope, and the spot analyzer is located on the side of the focusing lens away from the telescope. The focusing lens is used to focus the large light spot emitted by the telescope onto the sensitive area of ​​the spot analyzer to calibrate the telescope.

[0006] Therefore, by adjusting the position of the telescope in the X-axis and Z-axis directions through the drive mechanism, this method is simpler in structure and easier to operate than existing calibration methods. By adjusting the position of the telescope in the X-axis and Z-axis directions, it can adapt to telescopes of different aperture sizes, thereby enabling rapid calibration of the imaging quality of telescopes of different aperture sizes, reducing the judgment error of lidar telescope calibration, improving the accuracy of lidar telescope calibration, and ensuring the accuracy and sensitivity of subsequent atmospheric wind field detection data.

[0007] As a further improvement to the above technical solution: a first driving member is provided at the bottom of the focusing lens, and the focusing lens is mounted on the first driving member by a first fixing member.

[0008] As a further improvement to the above technical solution: a second driving component is provided at the bottom of the spot analyzer, and the spot analyzer is mounted on the second driving component by a second fixing component.

[0009] As a further improvement to the above technical solution, it also includes a light source, which is mounted on the second fixing member.

[0010] As a further improvement to the above technical solution: the driving mechanism includes a first driving unit, a second driving unit, and two third driving units. One third driving unit is connected to the driving end of the first driving unit, and the other third driving unit is connected to the driving end of the second driving unit. The driving ends of the two third driving units are used together to mount the telescope. Thus, by activating the light source, the first driving unit, the second driving unit, and the third driving units, the light emitted by the light source passes sequentially through the focusing lens and the telescope. The cooperation of the first driving unit, the second driving unit, and the third driving units ensures that the optical axes of the light source, the focusing lens, and the telescope are kept at the same height. This allows the light source to simultaneously pass through the center positions of the front and rear ends of the telescope, at which point the telescope height adjustment is considered complete.

[0011] As a further improvement to the above technical solution: the first driving unit has the same structure as the second driving unit; the first driving unit includes: a fixed base, a third driving member, a slider, and two guide rods. The third driving member is connected to the fixed base, and the slider is connected to the telescopic end of the third driving member. The third driving member is used to drive the slider to move along the X-axis direction. The two guide rods are located on both sides of the slider, pass through the slider, and are slidably connected to the slider. The slider is connected to the fixed base; the third driving unit is mounted on the slider. Thus, the first and second driving units ensure that the telescope is placed stably in the X-axis direction. In addition, the guide rods and the slider cooperate with each other to support the slider, thereby providing effective support force for the telescope and ensuring stable support of the telescope.

[0012] As a further improvement to the above technical solution: the third driving unit includes a fourth driving member and a third fixing member. The fourth driving member is mounted on the slider, and the third fixing member is mounted on the telescopic end of the fourth driving member. The fourth driving member is used to drive the third fixing member to move along the Z-axis direction. The third fixing members on both third driving units are used together to mount the telescope. Thus, the third driving unit ensures that the telescope is stably positioned in the Z-axis direction.

[0013] As a further improvement to the above technical solution, the drive mechanism further includes four pressure sensors, which are installed on the side of the third fixing member away from the third drive unit and are used to detect the pressure of the telescope; wherein the four pressure sensors are divided into two groups, with two pressure sensors in each group. Therefore, by using the monitoring data from the four pressure sensors, the telescope can be placed stably in the Z-axis direction, thereby further improving the calibration efficiency and accuracy of the telescope.

[0014] As a further improvement to the above technical solution, it also includes a control system, wherein the fiber laser, the driving mechanism, the first driving element, and the second driving element are all connected to the control system. Thus, the control system controls the fiber laser, the driving mechanism, the first driving element, and the second driving element, thereby controlling the calibration process of the entire calibration device.

[0015] As a further improvement to the above technical solution, it also includes: a base, wherein the fiber laser, the driving mechanism, the first driving component, and the second driving component are all connected to the base.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model adjusts the position of the telescope in the X-axis and Z-axis directions through a drive mechanism. Compared with existing calibration methods, this method has a simple structure and is easy to operate. By adjusting the position of the telescope in the X-axis and Z-axis directions, it can adapt to telescopes of different aperture sizes, thereby quickly calibrating the imaging quality of telescopes of different aperture sizes, reducing the judgment error of lidar telescope calibration, improving the accuracy of lidar telescope calibration, and providing a guarantee for the accuracy and sensitivity of subsequent atmospheric wind field detection data.

[0017] 2. This utility model activates the light source, the first driving component, the second driving component, and the third driving unit so that the light emitted by the light source passes through the focusing lens and the telescope in sequence. By utilizing the cooperation of the first driving component, the second driving component, and the third driving unit, the optical axes of the light source, the focusing lens, and the telescope are kept at the same height. Thus, the light source can pass through the center position of the front and rear ends of the telescope simultaneously, and the height adjustment of the telescope is considered to be complete. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the calibration device for the coherent Doppler wind lidar telescope of this utility model. Figure 2 This is an adjustment diagram of the optical axis consistency of this utility model; Figure 3 This is a schematic diagram of the drive mechanism of this utility model; Figure 4 This is a schematic diagram of the structure of the third drive unit of this utility model; Figure 5 This is a control block diagram of the calibration device for the coherent Doppler wind lidar telescope of this utility model; Figure 6 This is a diagram showing the debugging effect of the light spot analyzer of this utility model.

[0020] In the diagram: 1. Fiber laser; 2. Telescope; 3. Drive mechanism; 301, First drive unit; 3011, Fixed base; 3012, Third drive component; 3013, Slider; 3014, Guide rod; 302, Second drive unit; 303, Third drive unit; 3031, Fourth drive component; 3032, Third fixed component; 304, Pressure sensor; 4. Focusing lens; 401. First driving component; 402. First fixing component; 5. Spot analyzer; 501. Second driving component; 502. Second fixing component; 6. Light source; 7. Control system; 8. Base. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figures 1 to 6The diagram shows the preferred embodiment of this utility model. The calibration device for the coherent Doppler wind lidar telescope in this embodiment includes: a fiber laser 1, a drive mechanism 3, a focusing lens 4, and a spot analyzer 5. The fiber laser 1 is connected to the rear end of the telescope 2 and is used to emit a light spot of the actual wavelength used by the telescope 2. The telescope 2 is mounted on the drive mechanism 3 and is used to adjust the position of the telescope 2 along the X-axis and Z-axis directions. The focusing lens 4 is located in front of the telescope 2, and the spot analyzer 5 is located on the side of the focusing lens 4 away from the telescope 2. The focusing lens 4 is used to focus the large light spot emitted by the telescope 2 onto the sensitive surface area of ​​the spot analyzer 5 to calibrate the telescope 2. Therefore, by adjusting the position of telescope 2 in the X-axis and Z-axis directions through the drive mechanism 3, compared with the existing calibration method, this method has a simple structure and is easy to operate. By adjusting the position of telescope 2 in the X-axis and Z-axis directions, it can adapt to telescopes 2 with different aperture sizes, thereby quickly calibrating the imaging quality of telescopes 2 with different aperture sizes, reducing the judgment error of lidar telescope 2 calibration, improving the accuracy of lidar telescope 2 calibration, and providing a guarantee for the accuracy and sensitivity of subsequent atmospheric wind field detection data.

[0025] In other words, the current calibration methods for coherent Doppler wind lidar telescopes 2 mainly include: the star point method, the wave phase aberration method, and the target imaging method. The star point method is limited by the size of the light source 6 and cannot be matched with telescopes 2 of various aperture sizes. Moreover, human judgment errors are relatively large, especially for aberration results of small light spots. The wave phase aberration method has harsh operating conditions and expensive testing instruments. The target imaging method is only suitable for measurement work of telescopes 2 with a large field of view. Subjective judgment can easily lead to large system calibration errors. None of these three methods can guarantee that the imaging spot of telescope 2 can be effectively focused at the center position of the fiber core of a few micrometers. However, this application can achieve this through the drive mechanism 3. Adjusting telescope 2 along the X and Z axes overcomes the problem of repeated manufacturing and debugging of the entire calibration device due to different aperture sizes of telescope 2, resulting in high manpower and time costs. In addition, it can also overcome the problem of large calibration errors and the inability of the light spot to be effectively coupled into the fiber core (i.e., it has the characteristics of high calibration accuracy, simple operation, strong adaptability, etc., and can solve the problem of low optical signal reception of telescope 2, resulting in low system detection performance and large wind field error). It provides reliable device guarantee for the assembly, adjustment and signal standardization of lidar, and provides certain support for the accuracy of subsequent wind measurement data.

[0026] Specifically, depending on the detection capability of the coherent Doppler wind lidar, the aperture and optical structure length of the selected telescope 2 are different. At the same time, because the telescope 2 couples the return light signal into the fiber core of an optical fiber that is tens of micrometers or even a few micrometers in size, the low coupling efficiency will seriously affect the quality of the received optical signal.

[0027] It should be noted that the spot analyzer 5 is used to display the intensity Q, roundness C, and center position information of the light spot emitted by the fiber optic driver, and feeds this information back to the control system 7 to determine the debugging effect of the telescope 2.

[0028] Specifically, the spot analyzer 5 and the focusing lens 4 are kept horizontal.

[0029] Specifically, fiber laser 1 is connected to the FC / APC interface at the back end of telescope 2 via optical fiber. Fiber laser 1 is an erbium-doped pulsed fiber laser with an emission wavelength of 1550nm, an average emission power of not less than 0.2W, a pulse repetition frequency of not less than 5kHz, and a numerical aperture of not more than 0.12.

[0030] Specifically, telescope 2 can expand and amplify the detection beam emitted by fiber laser 1; telescope 2 is a coherent Doppler wind lidar telescope 2, weighing m, equipped with an FC / APC interface for connecting to fiber laser 1, and also equipped with a debugging mechanism to complete the debugging of the three-dimensional optical path. Telescope 2 adopts a Galilean transmission telescope 2, and the debugging structure adopts a three-top three-pull structure. When the wavelength of telescope 2 is 1550nm, its transmittance is not less than 99.0%, the aperture is generally not less than 40mm, and the magnification is generally not less than 10 times.

[0031] Specifically, the spot analyzer 5 adopts either a camera-type spot analyzer 5 or a slit-type spot analyzer 5, with a working wavelength of 900nm-1700nm, a pixel size of no more than 20um, a resolution of no less than 2Mpixel, a spot detection range of no less than 10*10mm, and a power range of no less than 500mW.

[0032] Specifically, focusing lens 4 is a plano-convex lens or a biconvex lens, with an optical focal length not exceeding [a certain value]. The aperture of the focusing lens 4 is not less than the optical aperture of telescope 2, and its transmittance is not less than 99.5% when the wavelength is 1550nm; among which, This indicates the distance between the spot analyzer 5 or the light source 6 and the focusing lens 4.

[0033] In this embodiment, a first driving member 401 is provided at the bottom of the focusing lens 4, and the focusing lens 4 is mounted on the first driving member 401 by a first fixing member 402.

[0034] In this embodiment, a second driving component 501 is provided at the bottom of the spot analyzer 5, and the spot analyzer 5 is mounted on the second driving component 501 by a second fixing component 502.

[0035] In this embodiment, a light source 6 is also included, which is mounted on the second fixing member 502. Thus, activating the light source 6, the first driving member 401, the second driving member 501, and the third driving unit 303 causes the light emitted by the light source 6 to pass sequentially through the focusing lens 4 and the telescope 2. The cooperation of the first driving member 401, the second driving member 501, and the third driving unit 303 ensures that the optical axes of the light source 6, the focusing lens 4, and the telescope 2 are kept at the same height. This allows the light source 6 to simultaneously pass through the center positions of the front and rear ends of the telescope 2, at which point the height adjustment of the telescope 2 is considered complete.

[0036] Specifically, the light source 6 adopts an LD light source 6 or a solid-state light source 6, with a wavelength of 532um or other visible light bands, a beam divergence angle of no more than 1mrad, a spot size of no more than 2mm, and a pulse repetition rate of no less than 1kHz.

[0037] In this embodiment, the drive mechanism 3 includes: a first drive unit 301, a second drive unit 302, two third drive units 303, and four pressure sensors 304. One third drive unit 303 is connected to the drive end of the first drive unit 301, and the other third drive unit 303 is connected to the drive end of the second drive unit 302. The drive ends of the two third drive units 303 are used to mount the telescope 2. The first drive unit 301 and the second drive unit 302 have the same structure. The first drive unit 301 includes: a fixed base 3011, a third drive member 3012, a slider 3013, and two guide rods 3014. The third drive member 3012 is connected to the fixed base 3011, and the slider 3013 is connected to the telescopic end of the third drive member 3012. The third drive member 3012 is used to drive the slider 3013 to move along the X-axis direction. The two guide rods 3014 are located on the slider. The block 3013 extends through both sides of the slider 3013 and is slidably connected to the slider 3013. The slider 3013 is connected to the fixed base 3011. The third drive unit 303 is mounted on the slider 3013. The third drive unit 303 includes a fourth drive member 3031 and a third fixing member 3032. The fourth drive member 3031 is mounted on the slider 3013, and the third fixing member 3032 is mounted on the telescopic end of the fourth drive member 3031. The fourth drive member 3031 is used to drive the third fixing member 3032 to move along the Z-axis. The third fixing members 3032 on the two third drive units 303 are used to mount the telescope 2. The pressure sensor 304 is mounted on the side of the third fixing member 3032 away from the third drive unit 303 and is used to detect the pressure of the telescope 2. The four pressure sensors 304 are divided into two groups, and each group has two pressure sensors 304. Thus, the first drive unit 301 and the second drive unit 302 ensure that the telescope 2 is placed stably in the X-axis direction; in addition, the guide rod 3014 and the slider 3013 cooperate with each other to support the slider 3013 through the guide rod 3014, so as to provide effective support force for the telescope 2 and ensure that the telescope 2 is supported stably; the third drive unit 303 ensures that the telescope 2 is placed stably in the Z-axis direction; and the monitoring data of the four pressure sensors 304 ensures that the telescope 2 is placed stably in the Z-axis direction, thereby further improving the calibration efficiency and calibration accuracy of the telescope 2.

[0038] It should be noted that the monitoring values ​​of the four pressure sensors 304 are as follows: ,like and If the telescope 2 is level, it is considered to be horizontal; otherwise, it is considered not level and the third drive unit 303 needs to adjust the levelness of the telescope 2 until it is level. and So that telescope 2 is placed horizontally.

[0039] Specifically, the displacement sensor has an accuracy of no less than 0.05 mm and a step range of no less than 500 mm, while the pressure sensor 304 has an accuracy of no less than 100 Pa and a range of no less than 100 MPa.

[0040] In this embodiment, a control system 7 is also included, and the fiber laser 1, driving mechanism 3, first driving element 401, and second driving element 501 are all connected to the control system 7. Thus, the control system 7 controls the fiber laser 1, driving mechanism 3, first driving element 401, and second driving element 501, thereby controlling the calibration process of the entire calibration device.

[0041] Specifically, the control system 7 adopts a computer or industrial control computer, which includes: a control module and a data analysis and processing module. The fiber laser 1, the first driving component 401, the second driving component 501, the third driving component 3012, the fourth driving component 3031, the pressure sensor 304, the spot analyzer 5, and the data analysis and processing module are all connected to the control module.

[0042] Specifically, the control system 7 can control the opening and closing of the fiber laser 1, the magnitude of the optical energy, and also judge the calibration and debugging effect of the telescope 2.

[0043] In this embodiment, the system also includes: a base 8, and the fiber laser 1, the driving mechanism 3, the first driving component 401, and the second driving component 501 are all connected to the base 8. Specifically, the fiber laser 1, the mounting base 3011, the first driving component 401, and the second driving component 501 are all connected to the base 8.

[0044] It should be noted that: 1. By cooperating with the displacement sensor and the pressure sensor 304, the optical axis consistency of the telescope 2, focusing lens 4, and spot analyzer 5 can be finely adjusted. The spot analyzer 5 can be used to precisely adjust and calibrate the imaging spot quality of the telescope 2. In addition, the entire debugging process does not require human judgment and the calibration accuracy is high. 2. The actual imaging results of telescope 2 are measured and calibrated using fiber laser 1 and spot analyzer 5 at the actual working wavelength. This method is fast, low-cost, and easy to operate.

[0045] The calibration process of the lidar telescope 2 of this utility model is as follows: First, the positions of the two third drive units 303 in the X-axis direction are adjusted by the first drive unit 301 and the second drive unit 302 respectively. Then, the telescope 2 to be calibrated is placed on the third drive unit 303, and the telescope 2 is placed horizontally by adjusting the extension and retraction of the third drive unit 303 according to the monitoring data of the four pressure sensors 304. Next, the light source 6 is placed on the second fixing member 502, and the light source 6, the first drive unit 401, the second drive unit 501 and the third drive unit 303 are started to keep the optical axes of the light source 6, the focusing lens 4 and the telescope 2 at the same height. Then, the light source 6 is removed from the second fixing member 502 and replaced with the spot analyzer 5. Finally, the fiber laser 1 and the spot analyzer 5 are started so that the fiber laser 1 emits laser light at the actual system working wavelength (i.e., wavelength of 1550nm, and laser intensity of: The light beam is magnified by telescope 2, then imaged onto the light spot analyzer 5 by focusing lens 4. The intensity of the light spot is adjusted by regulating the three-top, three-pull structure of telescope 2. Roundness Location of the center of mass If the calibration is complete, then the telescope 2 is considered to be calibrated.

[0046] In summary, this invention adjusts the position of the telescope 2 in the X-axis and Z-axis directions through the drive mechanism 3. Compared with existing calibration methods, this method has a simpler structure and is easier to operate. By adjusting the position of the telescope 2 in the X-axis and Z-axis directions, it can adapt to telescopes 2 with different aperture sizes, thereby quickly calibrating the imaging quality of telescopes 2 with different aperture sizes, reducing the judgment error of lidar telescope 2 calibration, improving the accuracy of lidar telescope 2 calibration, and providing a guarantee for the accuracy and sensitivity of subsequent atmospheric wind field detection data.

[0047] The above description is based on the preferred embodiments of this utility model. Through the above explanation, those skilled in the art can make various changes and modifications without departing from the technical concept of this invention. The technical scope of this invention is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A calibration device for a coherent Doppler wind lidar telescope, characterized in that, include: A fiber laser (1) is connected to the rear end of a telescope (2), and the fiber laser (1) is used to emit a light spot of the actual wavelength used by the telescope (2). Drive mechanism (3), the telescope (2) is mounted on the drive mechanism (3) and used to adjust the position of the telescope (2) along the X-axis and Z-axis directions; A focusing lens (4) and a spot analyzer (5) are provided. The focusing lens (4) is located in front of the telescope (2), and the spot analyzer (5) is located on the side of the focusing lens (4) away from the telescope (2). The focusing lens (4) is used to focus the large spot emitted by the telescope (2) onto the sensitive area of ​​the spot analyzer (5) to calibrate the telescope (2).

2. The calibration device for the coherent Doppler wind lidar telescope according to claim 1, characterized in that, The bottom of the focusing lens (4) is provided with a first driving member (401), and the focusing lens (4) is mounted on the first driving member (401) by a first fixing member (402).

3. The calibration device for the coherent Doppler wind lidar telescope according to claim 2, characterized in that, The bottom of the spot analyzer (5) is provided with a second driving component (501), and the spot analyzer (5) is mounted on the second driving component (501) by a second fixing component (502).

4. The calibration device for the coherent Doppler wind lidar telescope according to claim 3, characterized in that, Also includes: Light source (6), which is mounted on the second fixture (502).

5. The calibration device for the coherent Doppler wind lidar telescope according to claim 1, characterized in that, The drive mechanism (3) includes: The system comprises a first drive unit (301), a second drive unit (302), and two third drive units (303). One of the third drive units (303) is connected to the drive end of the first drive unit (301), and the other third drive unit (303) is connected to the drive end of the second drive unit (302). The drive ends of the two third drive units (303) are used together to mount the telescope (2).

6. The calibration device for the coherent Doppler wind lidar telescope according to claim 5, characterized in that, The first driving unit (301) and the second driving unit (302) have the same structure; The first drive unit (301) includes: The device comprises a fixed base (3011), a third driving member (3012), a slider (3013), and two guide rods (3014). The third driving member (3012) is connected to the fixed base (3011). The slider (3013) is connected to the telescopic end of the third driving member (3012). The third driving member (3012) is used to drive the slider (3013) to move along the X-axis. The two guide rods (3014) are located on both sides of the slider (3013), pass through the slider (3013), and are slidably connected to the slider (3013). The slider (3013) is connected to the fixed base (3011). The third drive unit (303) is mounted on the slider (3013).

7. The calibration device for the coherent Doppler wind lidar telescope according to claim 6, characterized in that, The third drive unit (303) includes: A fourth driving member (3031) and a third fixing member (3032) are provided. The fourth driving member (3031) is mounted on the slider (3013), and the third fixing member (3032) is mounted on the telescopic end of the fourth driving member (3031). The fourth driving member (3031) is used to drive the third fixing member (3032) to move along the Z-axis. The third fasteners (3032) on the two third drive units (303) are used together to mount the telescope (2).

8. The calibration device for the coherent Doppler wind lidar telescope according to claim 7, characterized in that, The drive mechanism (3) further includes: Four pressure sensors (304) are mounted on the side of the third fixture (3032) away from the third drive unit (303) and are used to detect the pressure of the telescope (2); The four pressure sensors (304) are divided into two groups, with two pressure sensors (304) in each group.

9. The calibration device for the coherent Doppler wind lidar telescope according to claim 3, characterized in that, Also includes: The control system (7) is connected to the fiber laser (1), the driving mechanism (3), the first driving component (401), and the second driving component (501).

10. The calibration device for the coherent Doppler wind lidar telescope according to claim 3, characterized in that, Also includes: The base (8) is connected to the fiber laser (1), the driving mechanism (3), the first driving component (401), and the second driving component (501).

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