Wind measurement laser radar capable of realizing automatic steering according to wind direction

Abstract

The invention belongs to the technical field of wind measurement laser radars, and particularly relates to a wind measurement laser radar capable of realizing automatic steering according to the wind direction, which comprises a wind measurement laser radar body, the front end of the wind measurement laser radar body is connected with a mounting frame, and a lens is mounted in a notch of the mounting frame. The bottom end of the wind measurement laser radar body is connected with a connecting seat, through gear linkage of the driving wheel and the driven wheel, rotation of the connecting column is achieved, and then the wind measurement laser radar body is driven to adjust the direction. In cooperation with the controller, the controller can transmit an instruction to start the stepping motor and drive the driving wheel to rotate, so that the automatic steering function of the anemometry laser radar body is ensured. The measurement accuracy is obviously improved, and the measurement error caused by the fact that the wind measurement laser radar cannot be adjusted along with the blade angle of the wind power generator set is avoided. Meanwhile, the control strategy of the wind power generator set is optimized, the power generation efficiency is improved, and stable operation and maximum wind energy utilization of the set are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of wind measuring laser radars, and in particular relates to a wind measuring laser radar which can realize automatic steering according to wind direction. Background Art

[0002] Wind Lidar is a remote sensing technology that uses laser pulses to measure wind speed and direction in the atmosphere. Wind Lidar uses laser as a carrier signal to generate echo signals through the interaction of aerosol particles and atmospheric molecules in the atmosphere. According to the Doppler effect, when the emitted laser beam is scattered by aerosol particles, the frequency of the scattered light will shift due to the relative motion between the particles and the laser source. By measuring this frequency shift, the speed of the particles, that is, the wind speed, can be calculated. At the same time, by scanning in different directions, three-dimensional wind field information can be obtained.

[0003] In existing wind turbines, wind-measuring lidar can accurately measure wind speed and direction, which are key parameters for wind turbine operation. By monitoring wind field data in real time, wind turbines can adjust their blade angles and rotation speeds to maximize wind energy capture efficiency. However, existing nacelle-type wind-measuring lidars are used in wind turbines, and the control strategies of wind turbines need to be adjusted according to real-time wind conditions and unit status. If the nacelle-type wind-measuring lidar cannot be adjusted along with the blade angle, the wind condition data it provides may deviate from the actual wind field conditions. This will limit the optimization of the control strategy, make it impossible to fully utilize wind energy, and may even cause the unit to operate under adverse wind conditions, increasing mechanical stress and operation and maintenance costs.

[0004] In view of this, we provide a wind measurement lidar that can automatically steer according to wind direction. Summary of the invention

[0005] The purpose of the present invention is to provide a wind measuring laser radar that can automatically turn according to wind direction, aiming to solve the problem in the prior art that the nacelle-type wind measuring laser radar cannot be adjusted along with the blade angle.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wind measuring laser radar that can realize automatic steering according to wind direction, comprising a wind measuring laser radar body, a mounting frame connected to the front end of the wind measuring laser radar body, a lens installed inside the recess of the mounting frame, a connecting seat connected to the bottom end of the wind measuring laser radar body, a base provided at the bottom end of the connecting seat, a fixing block installed at the top end of the base, a connecting column connected inside the fixing block, a first bearing installed at the bottom end of the connecting column, a driven wheel fixedly connected to the surface of the connecting column, a stepping motor installed inside the cavity of the fixing block, a driving wheel connected to the output shaft of the stepping motor, a controller and a battery connected inside the cavity of the fixing block, and a solar panel installed on the top surface of the base.

[0007] As a preferred wind measuring laser radar of the present invention that can realize automatic steering according to wind direction, the top end of the connecting column is connected to the connecting seat, and the connecting column is rotatably connected to the fixed block through the first bearing.

[0008] As a preferred embodiment of the wind measuring laser radar of the present invention that can realize automatic steering according to wind direction, the tooth spacing of the driving wheel and the driven wheel are meshed, and the connecting column forms a gear linkage between the driven wheel and the driving wheel.

[0009] As a preferred wind measuring laser radar of the present invention that can realize automatic steering according to wind direction, the outer wall of the mounting frame is adaptively connected with a protective cover, the top and bottom ends of the mounting frame are provided with sliding grooves, the inner wall of the protective cover is installed with a sliding block, and the top of the protective cover is installed with a sunlight sensor and a humidity sensor.

[0010] As a preferred embodiment of the wind measuring laser radar of the present invention that can realize automatic steering according to wind direction, the protective cover is slidably connected to the mounting frame through a slider and a slide groove.

[0011] As a preferred wind measuring laser radar of the present invention that can realize automatic steering according to wind direction, an electric pole is installed at the front end of the wind measuring laser radar body, the telescopic end of the electric pole is connected to a connecting block, the top end of the connecting block is connected to the bottom end of the protective cover, and the protective cover is telescopically connected to the mounting frame through the connecting block.

[0012] As a preferred wind measuring laser radar of the present invention that can realize automatic steering according to wind direction, two corresponding protrusions are installed on the inner side wall of the protective cover, and the corresponding side walls of the two protrusions are provided with grooves, and the interiors of the two grooves are respectively equipped with a screw and a guide rod, a second bearing is installed at one end of the screw, and a servo motor is installed at the other end of the screw, and a wiping cotton is connected between the two protrusions.

[0013] As a preferred wind measuring laser radar of the present invention that can realize automatic steering according to wind direction, the wiping cotton is adaptively connected in the groove, the wiping cotton and the screw rod are threadedly connected, and the wiping cotton and the guide rod are socket-connected.

[0014] As a preferred wind measuring laser radar of the present invention that can realize automatic steering according to wind direction, the four corners of the base are connected with threaded rods, the bottom end of the threaded rods is connected with a limiting block, the bottom end of the threaded rods is provided with a support block, the top end of the support block is connected with a mounting block, the top end of the wind measuring laser radar body is installed with a level bubble, and the threaded rod is rotatably connected with the mounting block through the limiting block.

[0015] As a preferred wind measuring laser radar of the present invention that can realize automatic steering according to wind direction, the controller, stepper motor, solar panel and battery are electrically connected, and the controller is electrically connected to the electric pole, sunlight sensor and humidity sensor.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention realizes the rotation of the connecting column through the gear linkage of the driving wheel and the driven wheel, thereby driving the wind laser radar body to adjust the direction. In conjunction with the controller, the controller can transmit instructions to start the stepper motor, drive the driving wheel to rotate, thereby ensuring the automatic steering function of the wind laser radar body. This innovative design significantly improves the accuracy of the measurement and avoids the measurement error caused by the inability of the wind laser radar to adjust with the blade angle of the wind turbine generator set. At the same time, it also optimizes the control strategy of the wind turbine generator set, improves the power generation efficiency, ensures the stable operation of the unit and maximizes the utilization of wind energy.

[0018] Then, when the electric rod is started, it pushes the connection block to extend and retract, and the connection block drives the protective cover to extend and retract accordingly, effectively shielding the lens, preventing sunlight from directly irradiating the lens, thereby avoiding abnormal increase in light signal intensity and spectral aliasing, ensuring that the laser radar can accurately identify the target signal and reduce the possibility of false alarms or missed alarms.

[0019] Secondly, through the cooperation of the servo motor, lead screw and guide rod, the wiping cotton can easily move back and forth to wipe the lens, effectively avoiding the accumulation of dust or water mist on the lens surface, thereby ensuring that the performance of the LiDAR is not affected.

[0020] Finally, by rotating the threaded rod, the support block can be driven to move up and down. With the use of a level bubble, the leveling function is realized to ensure that the wind laser radar body is installed smoothly and avoid the adverse effects of uneven installation on the performance of the laser radar. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the main structure of the present invention when viewed from above;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the fixing block of the present invention;

[0025] Figure 4 It is a schematic diagram of the separation structure of the protective cover and the mounting frame of the present invention;

[0026] Figure 5 This is a schematic diagram of the installation structure of the wiping cotton of the present invention;

[0027] Figure 6 It is a schematic diagram of the connection structure between the threaded rod and the support block of the present invention.

[0028] In the figure: 1. Wind laser radar body; 2. Mounting frame; 3. Lens; 4. Connecting seat; 5. Base; 6. Fixing block; 7. Connecting column; 8. First bearing; 9. Driven wheel; 10. Stepping motor; 11. Driving wheel; 12. Controller; 13. Battery; 14. Solar panel; 15. Protective cover; 16. Slider; 17. Sunlight sensor; 18. Humidity sensor; 19. Connecting block; 20. Electric rod; 21. Slide; 22. Bump; 23. Groove; 24. Screw; 25. Second bearing; 26. Servo motor; 27. Guide rod; 28. Level bubble; 29. ​​Threaded rod; 30. Support block; 31. Limit block; 32. Mounting block; 33. Wiping cotton. DETAILED DESCRIPTION

[0029] 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.

[0030] Embodiment 1

[0031] See also Figure 1-6The present invention provides the following technical solutions: a wind measuring laser radar that can realize automatic steering according to wind direction, comprising a wind measuring laser radar body 1, a mounting frame 2 is connected to the front end of the wind measuring laser radar body 1, a lens 3 is installed inside the recess of the mounting frame 2, a connecting seat 4 is connected to the bottom end of the wind measuring laser radar body 1, a base 5 is provided at the bottom end of the connecting seat 4, a fixing block 6 is installed at the top end of the base 5, a connecting column 7 is connected inside the fixing block 6, a first bearing 8 is installed at the bottom end of the connecting column 7, a driven wheel 9 is fixedly connected to the surface of the connecting column 7, a stepping motor 10 is installed inside the cavity of the fixing block 6, a driving wheel 11 is connected to the output shaft of the stepping motor 10, a controller 12 and a battery 13 are connected inside the cavity of the fixing block 6, and a solar panel 14 is installed on the top surface of the base 5.

[0032] In the preferred embodiment, the top end of the connecting column 7 is connected to the connecting seat 4 , and the connecting column 7 is rotatably connected to the fixing block 6 via the first bearing 8 .

[0033] In the preferred embodiment, the tooth spacing of the driving wheel 11 is meshed with that of the driven wheel 9 , and the connecting column 7 forms a gear linkage between the driven wheel 9 and the driving wheel 11 .

[0034] In the embodiment, after the stepper motor 10 is started, it can control the driving wheel 11 to rotate. Subsequently, the driving wheel 11 drives the driven wheel 9 to rotate synchronously through the transmission mechanism. The rotation of the driven wheel 9 further drives the connecting column 7 to rotate smoothly in the inner ring of the first bearing 8. The rotation of the connecting column 7 directly drives the wind laser radar body 1 to rotate in all directions, thereby realizing the direction adjustment function of the wind laser radar body 1.

[0035] It is worth noting that the power supply of the entire system depends on the battery 13, which provides the necessary power for the stepper motor 10 to ensure its normal operation. In order to maintain the sufficient power of the battery 13, a solar panel 14 is also provided, which can effectively convert solar energy into electrical energy and charge the battery 13, thereby ensuring that the entire system can operate continuously and stably.

[0036] Embodiment 2

[0037] See also Figure 1-6 The outer wall of the mounting frame 2 is matched with a protective cover 15, the top and bottom of the mounting frame 2 are provided with slide grooves 21, the inner wall of the protective cover 15 is provided with a slider 16, and the top of the protective cover 15 is provided with a sunlight sensor 17 and a humidity sensor 18.

[0038] In the preferred embodiment, the protective cover 15 is slidably connected to the mounting frame 2 via the slider 16 and the slide groove 21 .

[0039] In the preferred embodiment: an electric pole 20 is installed at the front end of the wind measuring laser radar body 1, the telescopic end of the electric pole 20 is connected to a connecting block 19, the top of the connecting block 19 is connected to the bottom end of the protective cover 15, and the protective cover 15 is telescopically connected to the mounting frame 2 through the connecting block 19.

[0040] In the embodiment, the electric rod 20 starts to work, and its telescopic end drives the connecting block 19 to move. Then, the connecting block 19 pulls the protective cover 15 to move accordingly. Then, the protective cover 15 drives the slider 16 to slide in the slide groove 21, and finally cooperates with the mounting frame 2 to block the lens 3 to prevent the sunlight from directly irradiating the lens 3. In this way, the abnormal increase of the light signal intensity and the occurrence of spectrum aliasing are avoided, ensuring that the laser radar can accurately identify the target signal and reduce the possibility of false alarm or missed alarm.

[0041] Embodiment 3

[0042] See also Figure 1-6 Two corresponding protrusions 22 are installed on the inner side wall of the protective cover 15, and grooves 23 are opened on the corresponding side walls of the two protrusions 22. The insides of the two grooves 23 are respectively equipped with a screw rod 24 and a guide rod 27. A second bearing 25 is installed at one end of the screw rod 24, and a servo motor 26 is installed at the other end of the screw rod 24. A wiping cotton 33 is connected between the two protrusions 22.

[0043] In the preferred embodiment, the wiping cotton 33 is adapted to be connected in the groove 23 , the wiping cotton 33 and the screw rod 24 are threadedly connected, and the wiping cotton 33 and the guide rod 27 are sleeve-connected.

[0044] In the embodiment, after the servo motor 26 is started, its output shaft drives the screw 24 to rotate in the inner ring of the second bearing 25. Then, the wiping cotton 33 moves back and forth in the groove 23 according to the thread on the surface of the screw 24. At the same time, the other end of the wiping cotton 33 slides along the guide rod 27. In this way, the wiping cotton 33 moving back and forth cleans the lens 3. It effectively avoids the accumulation of dust or the generation of water mist on the surface of the lens 3, thereby ensuring that the performance of the laser radar is not affected.

[0045] Embodiment 4

[0046] See also Figure 1-6 The four corners of the base 5 are connected with threaded rods 29, the bottom end of the threaded rods 29 is connected with a limiting block 31, the bottom end of the threaded rods 29 is provided with a support block 30, the top of the support block 30 is connected with a mounting block 32, and the top of the wind measuring laser radar body 1 is installed with a level bubble 28, and the threaded rods 29 are rotatably connected with the mounting block 32 through the limiting block 31.

[0047] In the preferred embodiment, the controller 12 , the stepper motor 10 , the solar panel 14 and the battery 13 are electrically connected, and the controller 12 and the electric rod 20 , the sunlight sensor 17 and the humidity sensor 18 are electrically connected.

[0048] In the embodiment, the threaded rod 29 rotates on the surface of the base 5 to rise and fall, while driving the support block 30 to rise and fall. Then, with the use of the level bubble 28, the leveling function is realized to ensure that the wind measuring laser radar body 1 is installed stably and avoid the adverse effects of uneven installation on the performance of the laser radar.

[0049] In summary, when using the wind laser radar body 1, first, the threaded rod 29 rotates on the surface of the base 5 to rise and fall, and at the same time drives the support block 30 to rise and fall, and then the support block 30 is close to the wind turbine, and then after contacting the wind turbine, the wind laser radar body 1 is fixed on the wind turbine through the fixed structure, and then the level bubble 28 is used to observe whether it is stable. If it is not stable, turn the threaded rod 29 again. At this time, the threaded rod 29 drives the limit block 31 to rotate inside the mounting block 32 without affecting the lifting of the threaded rod 29, and then lifts the position of the wind laser radar body 1. In this process, the leveling function is realized to ensure that the wind laser radar body 1 is installed stably and avoid the adverse effects of uneven installation on the performance of the laser radar.

[0050] Then, the controller 12 is electrically connected to the control system of the wind turbine generator set, and then when the wind laser radar body 1 is in use, the control system adjusts the blade angle data of the wind turbine generator set and can be transmitted to the controller 12, and then the controller 12 starts the stepper motor 10 to work. After the stepper motor 10 is started, it can control the driving wheel 11 to rotate. Subsequently, the driving wheel 11 drives the driven wheel 9 to rotate synchronously through the transmission mechanism. The rotation of the driven wheel 9 further drives the connecting column 7 to rotate smoothly in the inner ring of the first bearing 8. The rotation of the connecting column 7 directly drives the wind laser radar body 1 to rotate, thereby realizing the automatic adjustment function of the wind laser radar body 1. In this process, the accuracy of the measurement is significantly improved, and the measurement error caused by the inability of the wind laser radar to adjust with the blade angle of the wind turbine generator set is avoided. At the same time, it also optimizes the control strategy of the wind turbine generator set, improves the power generation efficiency, ensures the stable operation of the unit and maximizes the utilization of wind energy.

[0051] Next, the controller 12 is also electrically connected to the sunlight sensor 17 and the humidity sensor 18, so that when the wind laser radar body 1 is in use, the sunlight sensor 17 can sense the data of strong sunlight, and then transmit a signal to the controller 12, so that the controller 12 starts the electric rod 20 to start working, and its telescopic end drives the connecting block 19 to move. Subsequently, the connecting block 19 pulls the protective cover 15 to move accordingly. Then, the protective cover 15 drives the slider 16 to slide in the slide groove 21, and finally cooperates with the mounting frame 2 to block the lens 3 to prevent sunlight from directly shining on the lens 3. In this process, the abnormal increase in the intensity of the light signal and the occurrence of spectral aliasing are avoided, ensuring that the laser radar can accurately identify the target signal and reduce the possibility of false alarms or missed alarms.

[0052] The humidity sensor 18 can sense humidity data. If the humidity exceeds the set value, it will transmit a signal to the controller 12, so that the controller 12 starts the servo motor 26 to start working. After the servo motor 26 is started, its output shaft drives the screw 24 to rotate in the inner ring of the second bearing 25. Subsequently, the wiping cotton 33 moves back and forth in the groove 23 according to the thread on the surface of the screw 24. At the same time, the other end of the wiping cotton 33 slides along the guide rod 27. In this way, the wiping cotton 33 that moves back and forth two to three times cleans the lens 3. In this process, dust accumulation or water mist on the surface of the lens 3 is effectively avoided, thereby ensuring that the performance of the laser radar is not affected.

[0053] It should be noted that the generation of water mist on the surface of the lens 3 is mainly due to the influence of moisture in the air. The moisture will gradually decrease when the sunlight comes out. The wind laser radar body 1 is installed on a wind turbine generator set, and the wind turbine generator set is located in an outdoor environment. Due to the large temperature difference outdoors, water mist is easily generated on the lens 3. In order to deal with this problem, the design includes a wiping cotton 33, which can not only effectively deal with the water mist on the lens 3 during the back and forth movement, but also remove the dust on the lens 3 at the same time.

[0054] It is further supplemented that the working frequency of the wiping cotton 33 should not be too high, and the controller 12 is used to set the time, such as the time period with the highest humidity in the morning to make the wiping cotton 33 work. Avoid the wiping cotton 33 having too high a frequency that affects the normal use of the wind laser radar body 1.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wind laser radar capable of automatically steering according to wind direction, comprising a wind laser radar body (1), a mounting frame (2) connected to the front end of the wind laser radar body (1), a lens (3) installed inside a recess of the mounting frame (2), characterized in that: The bottom end of the wind laser radar body (1) is connected to a connecting seat (4), the bottom end of the connecting seat (4) is provided with a base (5), the top end of the base (5) is provided with a fixing block (6), and the interior of the fixing block (6) is connected to a connecting column (7); A first bearing (8) is installed at the bottom end of the connecting column (7), a driven wheel (9) is fixedly connected to the surface of the connecting column (7), a stepper motor (10) is installed inside the cavity of the fixing block (6), an output shaft of the stepper motor (10) is connected to a driving wheel (11), a controller (12) and a storage battery (13) are connected inside the cavity of the fixing block (6), and a solar panel (14) is installed on the top surface of the base (5).

2. The wind laser radar capable of automatically steering according to wind direction according to claim 1, characterized in that: The top end of the connecting column (7) is connected to the connecting seat (4), and the connecting column (7) is rotatably connected to the fixing block (6) via a first bearing (8).

3. The wind laser radar capable of automatically steering according to wind direction according to claim 1, characterized in that: The tooth spacing of the driving wheel (11) and the driven wheel (9) is meshed, and the connecting column (7) forms a gear linkage between the driven wheel (9) and the driving wheel (11).

4. The wind laser radar capable of automatically turning according to wind direction according to claim 1, characterized in that: The outer side wall of the mounting frame (2) is matched with a protective cover (15), the top and bottom ends of the mounting frame (2) are provided with sliding grooves (21), the inner side wall of the protective cover (15) is provided with a sliding block (16), and the top end of the protective cover (15) is provided with a sunlight sensor (17) and a humidity sensor (18).

5. The wind laser radar capable of automatically steering according to wind direction according to claim 4, characterized in that: The protective cover (15) is slidably connected to the mounting frame (2) via a sliding block (16) and a sliding groove (21).

6. The wind laser radar capable of automatically turning according to wind direction according to claim 1, characterized in that: An electric rod (20) is installed at the front end of the wind laser radar body (1); the telescopic end of the electric rod (20) is connected to a connecting block (19); the top end of the connecting block (19) is connected to the bottom end of the protective cover (15); and the protective cover (15) is telescopically connected to the mounting frame (2) via the connecting block (19).

7. The wind laser radar capable of automatically turning according to wind direction according to claim 4, characterized in that: The inner side wall of the protective cover (15) is provided with two corresponding protrusions (22), and the corresponding side walls of the two protrusions (22) are provided with grooves (23). The insides of the two grooves (23) are respectively equipped with a screw rod (24) and a guide rod (27), one end of the screw rod (24) is provided with a second bearing (25), and the other end of the screw rod (24) is provided with a servo motor (26), and a wiping cotton (33) is connected between the two protrusions (22).

8. The wind laser radar capable of automatically turning according to wind direction according to claim 7, characterized in that: The wiping cotton (33) is adapted to be connected in the groove (23), the wiping cotton (33) and the screw rod (24) are threadedly connected, and the wiping cotton (33) and the guide rod (27) are sleeve-connected.

9. The wind laser radar capable of automatically turning according to wind direction according to claim 1, characterized in that: The four corners of the base (5) are connected with threaded rods (29), the bottom end of the threaded rod (29) is connected to a limiting block (31), the bottom end of the threaded rod (29) is provided with a support block (30), the top end of the support block (30) is connected to a mounting block (32), a level bubble (28) is installed at the top end of the wind measuring laser radar body (1), and the threaded rod (29) is rotatably connected to the mounting block (32) through the limiting block (31).

10. The wind laser radar capable of automatically turning according to wind direction according to claim 1, characterized in that: The controller (12), the stepper motor (10), the solar panel (14) and the storage battery (13) are electrically connected, and the controller (12) is electrically connected to the electric rod (20), the sunlight sensor (17) and the humidity sensor (18).

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