Automatic balancing device for wind measurement laser radar

Abstract

The utility model discloses an automatic balancing device for a wind measurement laser radar, which relates to the technical field of radar balancing devices and comprises a wind measurement laser radar, a rotor support capable of carrying the wind measurement laser radar, a support frame arranged outside the rotor support and a mounting base arranged outside the support frame, and central axes of a flywheel rotor and the rotor support are collinear. The device further comprises a rotatable flywheel rotor, and the flywheel rotor and the wind measurement laser radar are coaxially distributed. According to the utility model, angular momentum is generated through high-speed rotation of the flywheel rotor, and when an external balance state is changed, under the action of the angular momentum, the rotor support and the center shaft of the wind measurement laser radar can be always kept in a vertical state without external interference. Therefore, the horizontal attitude position of the equipment can be kept in real time, the laser beam emitted by the radar is ensured to be perpendicular to the received signal, and the data accuracy of the wind measurement laser radar when the wind measurement laser radar is used on a mobile platform is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of radar balancing devices, in particular to an automatic balancing device for a wind measuring laser radar. Background Art

[0002] Wind lidar uses the Doppler effect of wind-borne aerosol particles on laser light. Using a principle similar to radio heterodyne reception, it emits a monochromatic laser (local oscillator light, with a frequency of ω1) onto the aerosol particles. The scattered laser signal (with a frequency of ω1 + 2πfd) is collected and coherently heterodyned with the radar system's local oscillator light (ω1). The resulting Doppler-shifted frequency signal (with a frequency of fd) is detected on a photodetector. Based on the functional relationship between the Doppler shift and the aerosol particle velocity, the aerosol velocity relative to the beam direction (Vr) can be calculated, thereby determining the wind velocity component of the aerosol particles along the beam direction (i.e., the radial wind velocity).

[0003] Most existing wind lidars use a wedge-shaped conical scanning method, scanning four directions with a cone at an angle of 15° or 30° from the vertical axis of the lidar's light output. After the lidar completes sending and receiving signals in one radial path, it begins measuring the radial velocity distribution in the next direction until it completes the predetermined number of directions. Once radial Doppler measurements in all directions are complete, the wind speed and direction can be determined based on the principle of vector synthesis. Therefore, during the measurement process, wind speed and direction are directly related to the central axis of the wind lidar's laser. The stability of this axis is particularly important in mobile measurement scenarios such as under-the-hood vehicle monitoring and ocean wind measurement, as it directly affects the accuracy of the measurement results.

[0004] However, in different mobile monitoring scenarios, if the existing mobile platform that can carry wind measuring radar shakes during movement, it is easy to cause the wind measuring lidar to deviate, and then cause the laser center axis to deviate, affecting the accuracy of the measurement work. Utility Model Content

[0005] In response to the above problems, the present application provides an automatic balancing device for a wind measuring lidar.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions: an automatic balancing device for a wind measuring laser radar, comprising a wind measuring laser radar, a rotor bracket capable of carrying the wind measuring laser radar, a support frame arranged outside the rotor bracket, and a mounting base arranged outside the support frame, wherein the central axes of the flywheel rotor and the rotor bracket are collinear.

[0007] It also includes a rotatable flywheel rotor, which is coaxially distributed with the wind measuring laser radar. When the flywheel rotor is located below the wind measuring laser radar and rotates at a high speed, angular momentum can be generated.

[0008] Furthermore, a DC motor is provided at the bottom end of the rotor bracket, and a cross mounting plate is provided inside the rotor bracket, and the cross mounting plate is located below the wind measuring laser radar. One end of the flywheel rotor is connected to the output shaft of the DC motor through a coupling, and the other end is connected to the cross mounting plate through a bearing. The center of mass of the flywheel rotor is located on the central axis of the rotor bracket.

[0009] Furthermore, the wind measuring laser radar is a cylindrical rotating body structure as a whole, and the light outlet and the center of gravity are both located on its central axis.

[0010] Furthermore, the rotor bracket is provided with a pair of second convex shafts along its radial direction, and the support frame is provided with a horizontal hole that can accommodate the pair of second convex shafts. The second convex shafts are installed in the horizontal holes through bearings. Under the action of gravity, the combination formed by the rotor bracket and the wind measuring laser radar is vertical to the horizontal plane, and the center of gravity of the combination is located below the second convex shafts.

[0011] Furthermore, the support frame is provided with a pair of first convex shafts along its radial direction, and the mounting base is provided with a horizontal hole that can accommodate the pair of first convex shafts. The first convex shafts are installed in the horizontal hole through bearings. Under the action of gravity, the support frame maintains a natural drooping state, and the center axis of the support frame is perpendicular to the horizontal plane.

[0012] Furthermore, the distribution paths of the first protruding axis and the second protruding axis are in the same plane, and the distribution paths of the first protruding axis and the second protruding axis are perpendicular to each other.

[0013] In summary, the technical effects and advantages of the utility model are:

[0014] This new device generates angular momentum through the high-speed rotation of the flywheel rotor. When the external equilibrium state changes, this angular momentum keeps the rotor bracket and the central axis of the wind laser radar perpendicular to each other, free from external interference. This allows the device to maintain a horizontal position in real time, ensuring the perpendicularity of the laser beam emitted by the radar and the received signal, thereby ensuring data accuracy when the wind laser radar is used on a mobile platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0017] Figure 2 This is a schematic diagram of the operating trajectory of the flywheel rotor of the utility model.

[0018] Figure 3 This is a schematic diagram of maintaining the operating posture of the wind measuring laser radar when the installation base of the utility model is offset.

[0019] In the figure: 1. Mounting base; 2. Support frame; 21. First cam; 3. DC motor; 4. Flywheel rotor; 5. Cross mounting plate; 6. Rotor bracket; 61. Second cam; 7. Wind laser radar. DETAILED DESCRIPTION

[0020] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0021] Example: Reference Figure 1-3 The illustrated automatic balancing device for a wind laser radar includes a wind laser radar 7, a rotor bracket 6 capable of carrying the wind laser radar 7, a support frame 2 disposed externally to the rotor bracket 6, and a mounting base 1 disposed externally to the support frame 2. The flywheel rotor 4 and the rotor bracket 6 have collinear central axes, forming a rigid assembly. The mounting base 1 is connected to a mobile platform, enabling the wind laser radar 7 to reach a designated position within the wind measurement path as the mobile platform moves.

[0022] It also includes a rotatable flywheel rotor 4, which is coaxially distributed with the wind measuring laser radar 7. When the flywheel rotor 4 is located below the wind measuring laser radar 7 and rotates at high speed, angular momentum can be generated.

[0023] Specifically, to ensure smooth rotation of the flywheel rotor 4, a DC motor 3 is mounted at the bottom of a rotor bracket 6. A cross-mounting plate 5 is located within the rotor bracket 6 and positioned below the wind laser radar 7. One end of the flywheel rotor 4 is connected to the output shaft of the DC motor 3 via a coupling, while the other end is connected to the cross-mounting plate 5 via a bearing. The DC motor 3 rotates quickly, eliminating the need for a speed reducer. The center of mass of the flywheel rotor 4 is located on the central axis of the rotor bracket 6. The flywheel rotor 4 is made of stainless steel.

[0024] When powered, the DC motor 3 drives the flywheel rotor 4 to rotate at high speed, generating angular momentum. Therefore, when the external equilibrium state changes, the angular momentum keeps the rotor bracket 6 and the central axis of the wind laser radar 7 perpendicular, free from external interference. This maintains the stability of the wind laser radar 7, preventing deviation caused by external factors and improving measurement accuracy.

[0025] In order to maintain the uniformity of the mass of the wind measuring laser radar 7 itself, the wind measuring laser radar 7 as a whole is a cylindrical rotating body structure, and the light outlet and the center of gravity are both located on its central axis.

[0026] The rotor bracket 6 is provided with a pair of second protruding shafts 61 along its radial direction. The support frame 2 is provided with horizontal holes that can accommodate the pair of second protruding shafts 61. The second protruding shafts 61 are mounted in the horizontal holes via bearings. The wind laser radar 7 is fixedly connected to the rotor bracket 6 and can be considered as an integral unit.

[0027] When assembly is complete and DC motor 3 is not powered on, gravity holds the assembly formed by rotor bracket 6 and wind laser radar 7 vertically in the horizontal plane, with its center of gravity located below second protruding shaft 61. Therefore, leveling is unnecessary and the assembly automatically maintains a horizontal position. Once powered on, DC motor 3 drives flywheel rotor 4 to generate angular momentum about its central axis, ensuring that the assembly of wind laser radar 7 and rotor bracket 6 remains vertical despite changes in external posture.

[0028] In order to maintain the stability of the support frame 2, the support frame 2 is provided with a pair of first protruding shafts 21 along its radial direction, and the mounting base 1 is provided with a horizontal hole that can accommodate the pair of first protruding shafts 21. The first protruding shafts 21 are installed in the horizontal hole through a bearing. Under the action of gravity, the support frame 2 maintains a natural drooping state, and the central axis of the support frame 2 is perpendicular to the horizontal plane.

[0029] The distribution paths of the first protrusion 21 and the second protrusion 61 are in the same plane, and the distribution paths of the first protrusion 21 and the second protrusion 61 are perpendicular to each other. Therefore, after the support frame 2, the rotor bracket 6 and the wind laser radar 7 are installed, they can maintain balance in two dimensions. The combination of the first protrusion 21 and the second protrusion 61 allows the mounting base 1 and the support frame 2 to move to different angles. Therefore, when the balance state of the mobile platform is broken and changes occur, the mounting base 1 and the support frame 2 can adapt to changes in the external environment. Because the flywheel rotor 4 generates angular momentum under high-speed rotation, when the angle of the mounting base 1 and the support base 2 changes, the central axis of the rotor bracket 6 and the wind laser radar 7 always remains perpendicular to the horizontal plane.

[0030] Finally, it should be noted that the above 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 make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic balancing device for a wind laser radar, characterized in that: It comprises a wind measuring laser radar (7), a rotor bracket (6) capable of carrying the wind measuring laser radar (7), a support frame (2) arranged outside the rotor bracket (6), and a mounting base (1) arranged outside the support frame (2), wherein the central axes of the flywheel rotor (4) and the rotor bracket (6) are collinear; The invention also includes a rotatable flywheel rotor (4), which is coaxially distributed with a wind-measuring laser radar (7). When the flywheel rotor (4) is located below the wind-measuring laser radar (7) and rotates at a high speed, angular momentum can be generated.

2. The automatic balancing device for wind laser radar according to claim 1, characterized in that: A DC motor (3) is provided at the bottom end of the rotor bracket (6), and a cross mounting plate (5) is provided inside the rotor bracket (6). The cross mounting plate (5) is located below the wind measuring laser radar (7). One end of the flywheel rotor (4) is connected to the output shaft of the DC motor (3) through a coupling, and the other end is connected to the cross mounting plate (5) through a bearing. The center of mass of the flywheel rotor (4) is located on the central axis of the rotor bracket (6).

3. The automatic balancing device for wind laser radar according to claim 1, characterized in that: The wind measurement laser radar (7) is a cylindrical rotating body structure as a whole, and the light outlet and the center of gravity are both located on its central axis.

4. The automatic balancing device for wind laser radar according to claim 1, characterized in that: The rotor bracket (6) is provided with a pair of second convex shafts (61) along its radial direction, and the support frame (2) is provided with a horizontal hole capable of accommodating the pair of second convex shafts (61). The second convex shafts (61) are installed in the horizontal hole through bearings. Under the action of gravity, the combination formed by the rotor bracket (6) and the wind measuring laser radar (7) is vertical to the horizontal plane, and the center of gravity of the combination is located below the second convex shafts (61).

5. The automatic balancing device for wind laser radar according to claim 4, characterized in that: The support frame (2) is provided with a pair of first convex shafts (21) along its radial direction, and the mounting base (1) is provided with a horizontal hole capable of accommodating the pair of first convex shafts (21). The first convex shafts (21) are mounted in the horizontal hole via bearings. Under the action of gravity, the support frame (2) maintains a naturally drooping state, and the central axis of the support frame (2) is perpendicular to the horizontal plane.

6. The automatic balancing device for wind laser radar according to claim 5, characterized in that: The distribution paths of the first convex shaft (21) and the second convex shaft (61) are located in the same plane, and the distribution paths of the first convex shaft (21) and the second convex shaft (61) are perpendicular to each other.

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