An ozone radar light receiving and transmitting path alignment system

Abstract

The present invention discloses an automatic alignment system for an ozone radar light receiving and transmitting circuit, comprising: a light emitting unit, a light splitting unit, a first light path system, a second light path system, a beam combining unit and an analysis and control device, wherein the analysis and control device comprises an industrial computer and a collection and control device, wherein the collection and control device is used for receiving data from the first light path system and the second light path system, and sending control information to the first light path system and the second light path system, and the industrial computer is used for processing the data received by the collection and control device, and sending the processed result to the collection and control device. The present invention overcomes the shortcomings of the prior art, optimizes the overall light receiving and transmitting circuit step by step, and can optimize the light path to an optimal state, which has obvious advantages over conventional manual adjustment and reaches a level that cannot be achieved manually.

Description

Technical Field

[0001] The invention belongs to the field of laser radar system detection equipment, and in particular relates to an ozone radar light receiving and transmitting circuit alignment system. Background Art

[0002] Laser radar can obtain information about atmospheric molecules, aerosol particles, ozone, etc. As a tool for detecting ozone, ozone laser radar has developed rapidly, but the existing ozone laser radar has the problem of low overall stability. The reason is that ozone laser radar adopts differential absorption method. The laser light source required by differential absorption laser radar is usually limited by the laser medium, and its output wavelength is limited. In order to expand the output wavelength of the laser and reduce the cost of the equipment itself, stimulated Raman tubes are mostly used in the market to obtain the required wavelength through the Raman effect. Due to the use of Raman tubes and multiple wavelengths, the light-receiving and light-emitting circuits of ozone laser radar are relatively complex. At the same time, in order to obtain more ideal signals, ozone laser radars mostly use high-power lasers. High-power lasers are greatly affected by ambient temperature, and the quality and angle of the laser spot often change due to slight changes in temperature. In order to obtain long-term stable data, we often need to calibrate the optical path regularly. The present invention can remotely realize the automatic alignment of the light-receiving and light-emitting circuits of ozone laser radars. Summary of the invention

[0003] The purpose of the present invention is to provide a system for automatically aligning the light transmission and receiving light path of an ozone radar, by which the light transmission light path of a laser radar can be automatically aligned.

[0004] To solve the above problems, the technical solutions adopted by the present invention are as follows:

[0005] An ozone radar light receiving and transmitting circuit automatic alignment system, comprising:

[0006] A light emitting unit, used for emitting laser;

[0007] A light splitting unit, used for splitting the laser emitted by the light emitting unit;

[0008] A first optical path system, used to adjust the direction of the laser in the first optical path system;

[0009] A second optical path system, used to adjust the direction of the laser in the second optical path system;

[0010] A beam combining unit, used for combining the laser beams of the first optical path system and the second optical path system;

[0011] The analysis control device includes an industrial computer and a collection control device. The collection control device is used to receive data from the first optical path system and the second optical path system, and send control information to the first optical path system and the second optical path system. The industrial computer is used to process the data received by the collection control device and send the processed results to the collection control device.

[0012] Among them, the first optical path system and the second optical path system are also equipped with a monitoring device five, and the monitoring device five is installed on the displacement device one. The beam combining unit also includes a monitoring device six, and the monitoring device six is ​​installed on the displacement device two.

[0013] Among them, the light-emitting unit is a laser, and the spectroscopic unit includes a spectroscope 1 and a reflector 4 arranged behind the spectroscope 1. The spectroscope 1 and the reflector 4 are located on the optical path of the laser emitted by the light-emitting unit. The spectroscope 1 divides the laser emitted by the light-emitting unit into a first laser and a second laser. The first laser enters the first optical path system, and the second laser enters the second optical path system through the reflector 4. Micromotors are installed at the rear of the spectroscope 1 and the reflector 4, and the micromotors are electrically connected to the acquisition control device.

[0014] Among them, the first optical path system includes reflector 1, detection hole 1, monitoring device 1, Raman tube 1, detection hole 2, monitoring device 2, reflector 2, reflector 3, beam expander 1, and reflector 8. The monitoring device 5 is located behind reflector 3, and the monitoring device 6 can be moved to the rear of reflector 8. The reflector 1 can reflect the laser to reflector 2, reflector 2 can reflect the laser to reflector 3, and reflector 3 can reflect the laser to reflector 8. Then the laser leaves the first optical path system from reflector 8 and enters the beam combining unit, and the reflector 1, reflector 2, reflector 3 and reflector 8 are installed vertically and crosswise between two adjacent ones, wherein the detection hole 1, Raman tube 1 and detection hole 2 are installed on the optical path between reflector 1 and reflector 2 in turn, and the monitoring device 1 and the monitoring device 2 are installed respectively. Installed behind detection hole one and detection hole two, beam expander one is installed on the optical path between reflector three and reflector eight, micro-motors are installed on the rear of reflector one, reflector two, reflector three and reflector eight, detection hole two and detection hole one are both high-temperature ceramic rings, displacement mechanisms are installed on detection hole two and detection hole one, the displacement mechanisms and micro-motors are electrically connected to the acquisition control device, monitoring device one and monitoring device two have the same mechanism, consisting of attenuation plate one and attenuation plate two, laser diode and wireless transmission module, attenuation plate one and attenuation plate two are installed in front of the laser diode at intervals, the laser diode is data-connected to the wireless transmission module, wherein the laser diode and the wireless transmission module are powered by an external power supply, and the wireless transmission module is data-connected to the acquisition control device.

[0015] Wherein, the second optical path system comprises a reflector five, a detection hole three, a monitoring device three, a Raman tube two, a detection hole four, a monitoring device four, a reflector six, a beam expander two, a monitoring device five, and a reflector seven. The monitoring device five is located behind the reflector seven. The reflector five can reflect the laser to the reflector six, and the reflector six can reflect the laser to the reflector seven. Then the laser leaves the second optical path system from the reflector seven and enters the beam combining unit. The reflector five, the reflector six, and the reflector seven are installed vertically and crosswise between two adjacent ones. The detection hole three, the Raman tube two, and the detection hole four are installed on the optical path between the reflector five and the reflector six in turn. The monitoring device three and the monitoring device four are installed behind the detection hole three and the detection hole four, respectively. The beam expander Device 2 is installed on the optical path between reflector 6 and reflector 7, and micro-motors are installed at the rear of reflector 5, reflector 6 and reflector 7. Detection hole 3 and detection hole 4 are both high-temperature ceramic rings. Displacement mechanisms are installed on detection hole 3 and detection hole 4. The displacement mechanisms and micro-motors are electrically connected to the acquisition control device. Monitoring device 3 and monitoring device 4 have the same mechanism, which are composed of attenuation plate 1 and attenuation plate 2, laser diode and wireless transmission module. Attenuation plate 1 and attenuation plate 2 are installed in front of the laser diode at intervals. The laser diode is connected to the wireless transmission module by data, wherein the laser diode and the wireless transmission module are powered by an external power supply, and the wireless transmission module is connected to the acquisition control device by data.

[0016] Among them, the beam combining unit includes a beam combining mirror, a reflector nine and a beam combining and deflecting mirror. The monitoring device six can be moved to the rear of the beam combining mirror and the reflector nine. The beam combining mirror combines the laser beams of the first optical path system and the second optical path system and reaches the reflector nine. After being reflected by the reflector nine, it reaches the beam combining and deflecting mirror, and then is reflected to the sky by the beam combining and deflecting mirror. Micromotors are installed at the rear of the beam combining mirror and the reflector nine, and the displacement mechanism and the micromotors are electrically connected to the acquisition control device.

[0017] The present invention also provides an alignment method, comprising the following steps:

[0018] (1) dividing the laser light emitted by the laser into a first laser light and a second laser light;

[0019] (2) blocking the second laser beam, and combining the first laser beam after four reflections, wherein the energy value difference of the first laser beam before and after the first reflection is less than 15%, and during the second, third, and fourth reflections, the energy value difference of the laser beam before and after each reflection is optimized to the maximum value by a stepwise optimization method;

[0020] (3) blocking the first laser beam, and combining the second laser beam after four reflections, wherein the energy value difference of the second laser beam before and after the first reflection is less than 15%, and during the second, third, and fourth reflections, the energy value difference of the laser beam before and after each reflection is optimized to the maximum value by a stepwise optimization method;

[0021] (4) The first laser beam and the second laser beam are combined, and the combined laser beam is reflected once and then reflected to the sky by a beam combining and deflecting mirror.

[0022] The step-by-step optimization method is as follows: determining the reflection angle of the laser at the previous reflection by the maximum value of the transmitted backscattered energy at the next reflection.

[0023] The present invention collects and measures scattered light, so that traditional detection units can be applied. Conventional detection units are easily saturated under strong light conditions, causing irreversible damage. The energy monitoring device controls the light intensity within an acceptable range by using a combination of attenuation plates with different transmittances, and then obtains the energy correspondence between the measured value and the actual value through a large amount of data measurement, thereby enabling energy monitoring. By combining the displacement mechanism with the energy monitoring device, a single detection unit can monitor multiple points of energy. The detection hole uses a ceramic ring to achieve high-energy position measurement. The laser is adjusted in both horizontal and vertical dimensions through micro-motor adjustment, and then the adjustment position of the micro-motor is determined through the monitoring device. The laser is adjusted to an ideal state through micro-motor adjustment, and the overall laser optical path is adjusted through step-by-step adjustment and monitoring.

[0024] Compared with the prior art, the present invention has the following beneficial effects: first, the entire transmitting optical path is in a monitoring state, which can realize real-time feedback of the overall state of the laser radar, thereby preventing the occurrence of faults in advance; second, the transmitted light can be selected for monitoring; third, the application of the displacement mechanism enables a single energy monitoring device to detect energy at multiple points, greatly reducing the overall cost. Fourth, the combined application of the attenuation plate and the photodiode enables energy monitoring to achieve low cost, high precision and fast response; fifth, the overall light-receiving and light-emitting path is optimized step by step, and the optical path can be optimized to the best state, which has obvious advantages over conventional manual adjustment and reaches a level that cannot be achieved manually. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall system of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the energy monitoring device of the present invention;

[0027] Figure 3 It is the front view of the detection hole of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The monitoring device 1, monitoring device 2, monitoring device 3, monitoring device 4, monitoring device 5 and monitoring device 6 used in the present invention are all the same monitoring device, and the monitoring device is composed of attenuation sheet 1 661 and attenuation sheet 2 662, laser diode 663 and wireless transmission module 664. Attenuation sheet 1 661 and attenuation sheet 2 662 are installed in front of laser diode 663 at intervals. Laser diode 663 is data connected with wireless transmission module 664, wherein laser diode 663 and wireless transmission module 664 are powered by an external power supply. Detection hole 1, detection hole 2, detection hole 3 and detection hole 4 have the same structure, and all use high temperature ceramic ring 601. The thickness of high temperature ceramic ring 601 is greater than the inner diameter of the high temperature ceramic ring. High temperature ceramic ring 601 can be installed on displacement mechanism 602, such as electric telescopic rod, and the position of high temperature ceramic ring 601 can be adjusted to block the laser passing through high temperature ceramic ring 601.

[0032] The rear parts of the beam splitter 1, reflector 1, reflector 2, reflector 3, reflector 4, reflector 5, reflector 6, reflector 7, reflector 8, reflector 9 and beam combiner of the present invention are all equipped with micro-motors, which can adjust the above lenses in two dimensions horizontally and vertically respectively; and the micro-motors are all electrically connected to the acquisition control device 19; the monitoring device 5 is installed on the displacement device 1, and the monitoring device 6 is installed on the displacement device 2. The displacement device 1 and the displacement device 2 are both Yinguan IX-05 series embedded electric slides, and the embedded electric slides are electrically connected to the acquisition control device 19.

[0033] Refer to the attached Figure 1-3 Laser 1 emits a laser with a certain energy intensity W1. The laser first passes through a beam splitter 2, and then the emitted light is divided into a first laser and a second laser by reflection and transmission. The energies of the first laser and the second laser are W2 and W3 respectively. The first laser reaches a reflector 4, and the second laser reaches a reflector 3.

[0034] (1) Adjust the first laser

[0035] By adjusting the detection hole three 52 , the second light source can be completely blocked; by adjusting the detection hole one 51 , the first laser can pass through the detection hole one 51 .

[0036] The first laser is first reflected by the reflector 4, and then passes through the detection hole 51. Then the monitoring device 61 at the detection hole 51 measures the direction-finding scattering energy of the first laser at the monitoring device 61. Then, the obtained scattering energy value is sent to the industrial computer 20 for analysis through the acquisition control device 19. The measured value W2a is calculated by the energy formula. According to the difference between W2a and W2, the micro-motor is controlled by the control device 19 to adjust the spectroscope 2 multiple times. At the same time, the energy curve is recorded to obtain the energy peak curve. Then, according to the position of the energy peak, W2a is adjusted to more than 85% of W2, and then the reflector 4 is adjusted until the difference between W2a and W2 is within 5%.

[0037] Then the first laser passes through the Raman tube 1 7 and then through the detection hole 2 53, and then the monitoring device 2 62 at the detection hole 2 53 measures the scattered energy of the first laser after transmitting the Raman tube, and then the acquired energy value W2b is compared with W2 through the acquisition control device 19, and then the micro-motor is controlled by the control device 19 to adjust the reflector 1 4, the acquisition control device 19 synchronously records the energy curve, and then the peak point is obtained, and the reflector 1 4 is adjusted to the position corresponding to the peak point; then the first laser reaches the reflector 2 9, and the monitoring device 5 65 is adjusted to the rear of the reflector 3 10 to measure the transmitted backscattered energy, and at the same time, the micro-motor is controlled by the control device 19 to adjust the reflector 2 9 alternately and reciprocally, and the acquired energy value is sent to the industrial computer 20 for analysis and drawing through the acquisition control device 19, and then the peak point is obtained, and the reflector 2 9 is adjusted to the position corresponding to the peak point; then the first laser passes through the reflectors in turn. Three 10, collimator one 112, at this time, the monitoring device six 66 is adjusted to 6A behind the reflector eight 13, and the transmitted backscattered energy at the reflector eight 13 is measured, and the micro-motor is controlled by the control device 19 to adjust the reflector three 10 alternately and reciprocatingly, and then the energy value obtained is sent to the industrial computer 20 for analysis and drawing through the acquisition control device 19, and then the peak point is obtained, and the reflector three 10 is adjusted to the position corresponding to the peak point; then the first laser passes through the reflector eight 13 and the beam combiner 14 respectively, and then the monitoring device six 66 is moved to 6B behind the beam combiner 14 and 6C behind the reflector nine 15 respectively, and the micro-motor is controlled by the control device 19 to adjust the reflector eight 13 and the beam combiner 14 in turn, and then the energy value obtained is analyzed and drawn through the acquisition control device 19, and then the peak point is obtained, and the reflector two 9 and the beam combiner 14 are adjusted to the positions corresponding to the peak point respectively.

[0038] (2) Adjust the second laser

[0039] Then, by adjusting the detection hole 1 51, the first light source can be completely blocked; by adjusting the detection hole 3 52, the second laser can pass through the detection hole 3 52, and then the side scattering energy at the detection hole 3 52 is measured by the monitoring device 3 63, and then the obtained scattered energy value is sent to the industrial computer 20 for analysis and drawing through the acquisition control device 19, and the measurement value W3a is calculated by the energy formula, and according to the difference between W3a and W3, the micro-motor is controlled by the control device 19 to adjust the reflector 4 3 for multiple times, and the energy curve is recorded at the same time to obtain the energy peak curve, and then according to the position of the energy peak, W3a is adjusted to more than 85% of W3, and then the micro-motor is controlled by the control device 19 to adjust the reflector 5 16 until the difference between W3a and W3 is within 5%.

[0040] Then the second laser passes through the Raman tube two 8 and then through the detection hole four 54, and then the monitoring device four 64 at the detection hole four 54 measures the backscattered energy of the second laser, and at the same time, the control device 19 controls the micro-motor to reciprocate the reflector five 16, and the energy value obtained is sent to the industrial computer 20 for analysis and drawing through the acquisition control device 19, and then the peak point is obtained, and the reflector five 16 is adjusted to the position corresponding to the peak point; then the second laser passes through the reflector six 17 and the beam expander two 111 in turn, and at this time the monitoring device five 65 is adjusted to 5B behind the reflector seven 18, and the control device 19 controls the micro-motor to reciprocate the reflector six 17 for multiple times to measure the backscattered energy of the transmitted laser, and then the acquisition control device 19 sends the obtained energy value to the industrial computer 20 for analysis and drawing, and then the peak point is obtained, and the reflector six 17 is adjusted to the position corresponding to the peak point; then the second laser passes through the reflector seven 18, and then the monitoring device six 66 is adjusted to 6B behind the beam combiner 14, and the micro-motor is controlled by the control device 19 to adjust the reflector seven 18 back and forth alternately, and the side scattering of the transmitted laser is monitored, and then the energy value obtained is plotted and analyzed by the acquisition control device 19, and then the peak point is obtained, and the reflector seven 18 is adjusted to the position corresponding to the peak point; then the second laser passes through the beam combiner 14, and the monitoring device six 66 is also moved to 6C behind the reflector nine 15, and the micro-motor is controlled by the control device 19 to adjust the beam combiner 14, and the side scattering of the transmitted laser is monitored, and then the energy value obtained is sent to the industrial computer 20 for analysis and mapping by the acquisition control device 19, and then the peak point is obtained, and the beam combiner 14 is adjusted to the position corresponding to the peak point.

[0041] (3) Bundle

[0042] According to the above method, the two light sources are optimized to the beam combining mirror 14, and then reach the reflector nine 15. The reflector nine 15 is adjusted by the control device 19 to control the micro motor, and then reflected to the sky through the beam combining and turning mirror 12.

[0043] After the above optimization of the energies W2 and W3 generated by the emitted energy W1, the second laser is blocked by adjusting the detection hole 3 52, and the detection hole 1 51 is restored to the initial middle position; then the energy is monitored synchronously through the monitoring device 1 61, the monitoring device 2 62, the monitoring device 5 65, and the monitoring device 6 66. Then the first laser is blocked to optimize the second laser. After the two-step optimization is completed, the reflector 9 15 is finally optimized and adjusted according to the signal state returned by the ozone radar acquisition software. The final optimization here is judged in combination with the received signal. The default judgment is based on the signal-to-noise ratio at three kilometers, which can be adjusted according to different radar systems.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ozone radar light receiving and transmitting circuit automatic alignment system, characterized in that: include: A light emitting unit, used for emitting laser; A light splitting unit, used for splitting the laser emitted by the light emitting unit; A first optical path system, used to adjust the direction of the laser in the first optical path system; A second optical path system, used to adjust the direction of the laser in the second optical path system; A beam combining unit, used for combining the laser beams of the first optical path system and the second optical path system; The analysis control device includes an industrial computer and a collection control device, wherein the collection control device is used to receive data from the first optical path system and the second optical path system, and send control information to the first optical path system and the second optical path system, and the industrial computer is used to process the data received by the collection control device and send the processed results to the collection control device; A monitoring device five is also installed in the first optical path system and the second optical path system, and the monitoring device five is installed on the displacement device one. The beam combining unit also includes a monitoring device six, and the monitoring device six is ​​installed on the displacement device two. The light-emitting unit is a laser, and the spectroscopic unit includes a spectroscope one and a reflector four arranged behind the spectroscope one. The spectroscope one and the reflector four are located on the optical path of the laser emitted by the light-emitting unit. The spectroscope one divides the laser emitted by the light-emitting unit into a first laser path and a second laser path. The first laser path enters the first optical path system, and the second laser path enters the second optical path system through the reflector four. Micromotors are installed at the rear of the spectroscope one and the reflector four, and the micromotors are electrically connected to the acquisition control device.

2. The ozone radar light receiving and transmitting circuit automatic alignment system according to claim 1 is characterized in that: The first optical path system includes a reflector 1, a detection hole 1, a monitoring device 1, a Raman tube 1, a detection hole 2, a monitoring device 2, a reflector 2, a reflector 3, a beam expander 1, and a reflector 8. The monitoring device 5 is located behind the reflector 3, and the monitoring device 6 can be moved to the rear of the reflector 8. The reflector 1 can reflect the laser to the reflector 2, the reflector 2 can reflect the laser to the reflector 3, and the reflector 3 can reflect the laser to the reflector 8. Then the laser leaves the first optical path system from the reflector 8 and enters the beam combining unit. The reflector 1, the reflector 2, the reflector 3 and the reflector 8 are installed vertically and crosswise between two adjacent ones. The detection hole 1, the Raman tube 1 and the detection hole 2 are installed on the optical path between the reflector 1 and the reflector 2 in turn. The monitoring device 1 and the monitoring device 2 are installed respectively. Behind the detection hole one and the detection hole two, the beam expander one is installed on the optical path between the reflector three and the reflector eight. The rear parts of the reflector one, the reflector two, the reflector three and the reflector eight are all installed with micro-motors. The detection hole two and the detection hole one are both high-temperature ceramic rings. The detection hole two and the detection hole one are both installed with displacement mechanisms. The displacement mechanisms and the micro-motors are electrically connected to the acquisition control device. The monitoring device one and the monitoring device two have the same mechanism, and are composed of an attenuation plate one and an attenuation plate two, a laser diode and a wireless transmission module. The attenuation plate one and the attenuation plate two are installed at intervals in front of the laser diode. The laser diode is data-connected to the wireless transmission module, wherein the laser diode and the wireless transmission module are powered by an external power supply, and the wireless transmission module is data-connected to the acquisition control device.

3. The ozone radar light receiving and transmitting circuit automatic alignment system according to claim 1, characterized in that: The second optical path system includes a reflector five, a detection hole three, a monitoring device three, a Raman tube two, a detection hole four, a monitoring device four, a reflector six, a beam expander two, a monitoring device five, and a reflector seven. The monitoring device five is located behind the reflector seven. The reflector five can reflect the laser to the reflector six, and the reflector six can reflect the laser to the reflector seven. Then the laser leaves the second optical path system from the reflector seven and enters the beam combining unit. The reflector five, the reflector six, and the reflector seven are installed vertically and crosswise between two adjacent ones. The detection hole three, the Raman tube two, and the detection hole four are installed on the optical path between the reflector five and the reflector six in turn. The monitoring device three and the monitoring device four are installed behind the detection hole three and the detection hole four, respectively. The beam expander two Installed on the optical path between reflector six and reflector seven, the rear parts of reflector five, reflector six and reflector seven are all installed with micro-motors, the detection hole three and detection hole four are both high-temperature ceramic rings, and the detection hole three and detection hole four are both installed with displacement mechanisms, and the displacement mechanisms and micro-motors are electrically connected to the acquisition control device. The monitoring device three and the monitoring device four have the same mechanism, and are composed of attenuation plate one and attenuation plate two, a laser diode and a wireless transmission module. The attenuation plate one and attenuation plate two are installed at intervals in front of the laser diode, and the laser diode is data-connected to the wireless transmission module, wherein the laser diode and the wireless transmission module are powered by an external power supply, and the wireless transmission module is data-connected to the acquisition control device.

4. The ozone radar light receiving and transmitting circuit automatic alignment system according to claim 3 is characterized in that: The beam combining unit includes a beam combining mirror, a reflector nine and a beam combining deflection mirror. The monitoring device six can be moved to the rear of the beam combining mirror and the reflector nine. The beam combining mirror combines the laser beams of the first optical path system and the second optical path system and reaches the reflector nine. After being reflected by the reflector nine, it reaches the beam combining deflection mirror and then is reflected to the sky by the beam combining deflection mirror. Micromotors are installed at the rear of the beam combining mirror and the reflector nine, and the displacement mechanism and the micromotors are electrically connected to the acquisition control device.

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