Laser wind measuring device

Abstract

The invention relates to a laser wind measuring device, which comprises a shell, a laser wind measuring device, a laser wind measuring device, a laser wind measuring device, a laser wind measuring device and a laser wind measuring device, and is characterized in that a hollow cavity is formed in the shell; the four laser radar transmitting assemblies are arranged in the hollow cavity through a radar mounting bracket, and the radar mounting bracket is provided with a mounting surface extending in the vertical direction; wherein the four laser radar transmitting assemblies are arranged on the mounting surface in the width direction of the radar mounting bracket, and the central axes of every two adjacent laser radar transmitting assemblies are arranged in a mutually crossed manner in the horizontal direction and / or the vertical direction; the four laser radar transmitting assemblies are arranged in the detection window, so that light rays transmitted by the four laser radar transmitting assemblies respectively form a detection point at the target distance of the detection window, and the four detection points form a detection plane parallel to the mounting surface.

Description

Technical Field

[0001] This application relates to the technical field of measuring devices, and particularly to a laser wind measurement device. Background Art

[0002] Relying on single-frequency laser technology, a lidar wind measurement radar performs coherent heterodyne detection on the local oscillator light and the backscattered signal of the laser by atmospheric aerosol. By carefully capturing the subtle changes in the Doppler frequency shift, the device can accurately calculate the radial wind speed. Further, with the help of multi-beam scanning technology, the radar can obtain wind speed information in multiple directions and inversely calculate real-time wind field data based on this.

[0003] However, in traditional lidar wind measurement devices, due to the need to set multiple laser emission lenses, the overall size and weight of the device are large. In order to reduce the overall size, how to reasonably arrange the laser emission lenses in the nacelle is an urgent problem to be solved. Summary of the Invention

[0004] An embodiment of this application provides a laser wind measurement device. The lens barrel assembly adopts a staggered layout, effectively utilizing the structural space and reducing the overall size and weight of the device.

[0005] In an embodiment of this application, a laser wind measurement device is provided, including: A housing, which forms a hollow cavity, and the front surface of the housing has a detection window; Four lidar emission components, which are installed in the hollow cavity via a radar mounting bracket, and the radar mounting bracket has a mounting surface extending in the vertical direction; Wherein, the four lidar emission components are arranged on the mounting surface along the width direction of the radar mounting bracket, and the central axes of every two adjacent lidar emission components are arranged to intersect with each other in the horizontal direction and / or the vertical direction, so that the light rays emitted by the four lidar emission components respectively form a detection point at the target distance of the detection window, and the four detection points form a detection plane parallel to the mounting surface.

[0006] In an embodiment, the optical axis of each lidar emission component has a yaw angle forming a first angle with the vertical plane and a pitch angle forming a second angle with the horizontal plane; Wherein, the pitch angles of a pair of spaced-apart lidar emission components are the same, and the yaw angles are opposite.

[0007] In an embodiment, the pitch angles of one pair of spaced-apart lidar emission components are configured to tilt upward, and the pitch angles of the other pair of spaced-apart lidar emission components are configured to tilt downward; and / or The yaw angles of a pair of spaced-apart lidar emission components are configured to be inclined towards one of the lidar emission components between them.

[0008] In one embodiment, two adjacent lidar emission components are mounted on the mounting surface in an interleaved manner in the vertical direction and are in contact with each other.

[0009] In one embodiment, the height, width, and thickness of the hollow cavity are related to the first angle and the second angle; wherein, if the target value of the height is set, when d / cosy° ≤ 2Lsiny°, A min = 2Lsiny° + 3d / cosy°, when d / cosy° > 2Lsiny°, A min = 3Lsiny° + 2.5d / cosy°; wherein, if the target value of the width is set, then C min = 2L1sinx° + 2dcosx° + 2d / cosx°; The minimum value of B is the larger one of B = Lcosy° + dsiny° or B = L1cosx°; wherein, d is the outer diameter of the lidar emission component, L is the dimension of the lidar emission component protruding from the mounting surface relative to the vertical plane, L1 is the dimension of the lidar emission component protruding from the mounting surface relative to the horizontal plane, A min is the minimum value of the A value, C min is the minimum value of the C value.

[0010] In one embodiment, it includes: At least three horizontal adjustment components, the horizontal adjustment components support the housing from the bottom, and the horizontal adjustment components are not arranged in the same straight line, and the height of the horizontal adjustment components in the vertical direction is adjustable to adjust the angle between the housing and the horizontal plane; A first adapter plate, the first adapter plate is connected to the bottom of the housing, and the horizontal adjustment components are supported and connected to the first adapter plate.

[0011] In one embodiment, each horizontal adjustment component includes: A support seat, the support seat is fixed to the carrier surface; A screw, the screw extends in the vertical direction, the bottom of the screw is rotationally supported around the vertical direction on the support seat, and the top is threadedly connected to the first adapter plate; A first nut, the first nut is in threaded cooperation with the screw, and locks or unlocks the screw and the first adapter plate by abutting against or disengaging from the first adapter plate; A second nut, which is in threaded engagement with the screw rod and makes the screw rod and the support base locked or unlocked by abutting against or disengaging from the top surface of the support base via the second nut; Wherein, the distance between the first adapter plate and the support base forms the height of the horizontal adjustment assembly.

[0012] In one embodiment, each horizontal adjustment assembly includes: A third nut, which is in threaded engagement with the screw rod and abuts against the bottom surface of the support base.

[0013] In one embodiment, the lidar emission assembly includes: A lens barrel, which is formed in a cylindrical shape; A lens assembly, which is installed at the first end of the lens barrel, and the central axis of the lens barrel coincides with the optical axis of the lens assembly; A laser emission end, which is installed at the second end of the lens via an optical fiber flange; Wherein, the lens assembly is fixed to the lens barrel in the optical axis direction via a lens retaining ring and in the radial direction perpendicular to the optical axis via at least one set screw.

[0014] In one embodiment, the optical fiber flange is installed on the lens barrel via a spacing adjustment assembly, wherein the spacing adjustment assembly is threadedly connected to the inner wall of the lens barrel, the lens barrel has an annular groove recessed inward along the central axis direction from the end face of the second end, the outer edge of the spacing adjustment assembly is received in the annular groove, and is fixedly connected to the annular groove via a colloid.

[0015] As can be seen from the above technical solutions, in the lidar anemometry device of this embodiment, the lens barrel assembly adopts a staggered layout, effectively utilizing the structural space and reducing the overall size and weight of the device. Further, the leveling structure of the device realizes the leveling of the device by adjusting the screw rod, and the operation is simple. In addition, in this example, the lens assembly is fixed synchronously by a retaining ring and set screws, with high reliability, and the laser emission docking flange is provided with a threaded adjustment structure to realize fine adjustment of the distance of the fixed position. After adjustment, it is fixed by potting, which is convenient for adjustment and has high reliability. Description of the Drawings

[0016] The following drawings only make schematic illustrations and explanations of this application, and do not limit the scope of this application.

[0017] Figure 1 It is a schematic structural diagram of the lidar anemometry device of this application.

[0018] Figure 2 It is a schematic layout diagram of the laser emission assembly in the lidar anemometry device of this application.

[0019] Figure 3 This is a layout schematic diagram of the laser emission component in the laser anemometry device of the present application.

[0020] Figure 4 This is a structural schematic diagram of the horizontal adjustment device in the laser anemometry device of the present application.

[0021] Figure 5 This is a structural schematic diagram of the laser emission component in the laser anemometry device of the present application. Detailed implementation manners

[0022] For a clearer understanding of the technical features, objectives, and effects of the invention, the detailed implementation manners of the present invention will now be described with reference to the accompanying drawings. The same reference numerals in the figures denote the same parts.

[0023] In this document, "schematic" means "serving as an example, instance, or illustration", and any illustration or implementation manner described as "schematic" in this document should not be construed as a more preferred or more advantageous technical solution.

[0024] To simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and do not represent the actual structure of the product. Additionally, to simplify the drawings for easy understanding, in some figures, for components with the same structure or function, only one of them is schematically shown, or only one of them is labeled.

[0025] In this document, "upper", "lower", "front", "rear", "left", "right", etc. are only used to represent the relative positional relationship between relevant parts, rather than limiting the absolute positions of these relevant parts.

[0026] In this document, "first", "second", etc. are only used for mutual distinction, rather than indicating importance, order, or a prerequisite for mutual existence, etc.

[0027] In this document, "equal", "same", etc. are not strict mathematical and / or geometric limitations, and also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use, etc. Unless otherwise specified, the numerical ranges in this document include not only the entire range between its two endpoints, but also several sub-ranges included therein.

[0028] The embodiments of the present application provide a laser anemometry device. The lens barrel assembly adopts a staggered layout, effectively utilizing the structural space and reducing the overall size and weight of the machine.

[0029] Now, each exemplary embodiment will be described more fully with reference to the accompanying drawings.

[0030] As Figures 1 to 5As shown in the figure, an embodiment of the present application provides a laser anemometry device, including: A housing 1, the housing 1 forms a hollow cavity, and the front surface of the housing 1 has a detection window; Four lidar emission components 2, the four lidar emission components 2 are installed in the hollow cavity via a radar mounting bracket 3, and the radar mounting bracket 3 has a mounting surface extending in the vertical direction; Among them, the four lidar emission components 2 are arranged on the mounting surface along the width direction of the radar mounting bracket 3, and the central axes of every two adjacent lidar emission components 2 are arranged in a cross pattern in the horizontal direction and / or the vertical direction, so that the light rays emitted by the four lidar emission components 2 respectively form a detection point at the target distance of the detection window, and the four detection points form a detection plane parallel to the mounting surface.

[0031] The lidar anemometer is a remote sensing device that uses the Doppler frequency shift generated by the interaction between laser and aerosol particles in the atmosphere to measure the atmospheric wind field. The whole machine in this example includes 4 lidar emission components 2. The barrel of each lidar emission component 2 has an angle with one or both of the horizontal plane and the vertical plane, so that the laser beams emitted by the 4 barrels form a plane at a predetermined position in front of the housing. The wind speed within a specified range can be obtained through software analysis. The 4 barrels adopt a staggered layout, which can effectively utilize the internal cavity space of the structure and reduce the size and weight of the whole machine.

[0032] Among them, the lidar anemometer in this example can be particularly applied to the wind field measurement in an environment such as a windmill use environment to calculate the wind field intensity acting on the windmill blades. Therefore, in this example, the emitted light rays of each lidar emission component 2 can each form a detection point at a target distance from the detection window, and the lidar emission components arranged in a cross pattern can form multiple detection points (more than three) that are not on the same straight line. Thus, it is certain that a quadrilateral detection plane can be formed at a target distance from the detection window, and this detection plane is parallel to the mounting surface. The wind speed within the formed detection plane can be obtained through software analysis.

[0033] Specifically, the four lidar emission components 2 are installed in the hollow cavity via a radar mounting bracket 3. The radar mounting bracket 3 has a mounting surface extending in the vertical direction. The lidar emission components 2 are installed on the radar mounting bracket 3 in a manner close to perpendicular to the mounting surface, so that the optical axes of the lidar emission components 2 are emitted towards the detection window on the front surface of the housing 1 in a generally horizontal forward manner.

[0034] Specifically, the four lidar emission components 2 are arranged in a row along the width direction of the installation surface, being close to and approximately on the same horizontal plane, but not exactly on the same horizontal plane. However, the optical axes of each lidar emission component 2 are all oriented in different directions, and the central axes of every two adjacent lidar emission components 2 intersect with each other in the horizontal direction and / or the vertical direction to form a staggered arrangement.

[0035] Among them, the staggered arrangement means that the central axes of two adjacent lidar emission components 2 form an angle and are not coplanar. This arrangement enables the internal space of the cabin to be shared by two adjacent lidar emission components both in the horizontal direction and in the vertical direction. In the case of ensuring that the optical axes of each lidar emission component 2 are all oriented in different directions, the staggered arrangement can reduce the overall space occupied by the four lidar emission components 2.

[0036] In this example, the vertical direction refers to the plane extending along the direction of gravity, and the horizontal direction is the plane direction perpendicular to the vertical direction. Among them, the vertical plane can refer to the plane extending along the direction of gravity and perpendicular to the installation surface, and the horizontal plane can refer to the plane perpendicular to both the installation surface and the vertical plane.

[0037] In a specific example, the optical axis of each lidar emission component 2 has a yaw angle forming a first angle with the vertical plane and a pitch angle forming a second angle with the horizontal plane; Among them, the pitch angles of a pair of spaced-apart lidar emission components 2 are the same, and the yaw angles are opposite.

[0038] The yaw angle is the angle describing the rotation of an object around the vertical axis in the horizontal plane, specifically manifested as left-right rotation. The pitch angle is the angle describing the rotation of an object around the horizontal axis in the vertical plane, manifested as up-down offset. Taking Figure 2 the coordinate system in it as an example, when the optical axis of the lidar emission component 2 is inclined towards a direction lower than the horizontal plane, its pitch angle can be defined as negative; when the optical axis of the lidar emission component 2 is inclined towards a direction higher than the horizontal plane, its pitch angle can be defined as positive; when the optical axis of the lidar emission component 2 deflects towards the left side (the first side) of the vertical plane, its yaw angle can be defined as positive; when the optical axis of the lidar emission component 2 deflects towards the right side (the second side) of the vertical plane, its yaw angle can be defined as negative.

[0039] Among them, the staggered arrangement of the four lidar emission components 2 is such that the pitch angles of a pair of spaced-apart lidar emission components 2 are the same, and the yaw angles are opposite.

[0040] Taking Figure 2The direction from left to right is sequential. The leftmost is the No. 1 lens barrel assembly, and the rightmost is the No. 4 lens barrel assembly. Among them, the No. 1 lens barrel assembly and the No. 3 lens barrel assembly are arranged at intervals, and the No. 2 lens barrel assembly and the No. 4 lens barrel assembly are arranged at intervals. The pitch angles of the No. 1 lens barrel assembly and the No. 3 lens barrel assembly are the same, and the yaw angles are opposite; the pitch angles of the No. 2 lens barrel assembly and the No. 4 lens barrel assembly are the same, and the yaw angles are opposite.

[0041] For example, taking the first included angle as y and the second included angle as x, the included angles of the No. 1 lens barrel assembly, the No. 2 lens barrel assembly, the No. 3 lens barrel assembly, and the No. 4 lens barrel assembly with the horizontal plane and the vertical plane are (x°, -y°), (-x°, -y°), (x°, y°), and (-x°, y°) respectively.

[0042] Furthermore, the pitch angles of one pair of the spaced laser radar transmitting assemblies 2 are configured to be inclined upward, and the pitch angles of the other pair of the spaced laser radar transmitting assemblies 2 are configured to be inclined downward.

[0043] Optionally, the yaw angles of a pair of the spaced laser radar transmitting assemblies 2 are configured to be skewed toward a laser radar transmitting assembly 2 clamped between this pair of laser radar assemblies 2. A laser radar transmitting assembly 2 is clamped between each pair of the spaced laser radar transmitting assemblies 2, and this pair of laser radar transmitting assemblies 2 are inclined toward the middle laser radar transmitting assembly 2 relative to each other. For example, the No. 1 lens barrel assembly and the No. 3 lens barrel assembly are arranged at intervals, and both the No. 1 lens barrel assembly and the No. 3 lens barrel assembly are inclined toward the No. 2 lens barrel assembly. Among them, the relative manner means that a pair of laser radar transmitting assemblies 2 are arranged in a manner that their front ends are close to each other.

[0044] Then the No. 1 lens barrel assembly and the No. 3 lens barrel assembly are opposite to each other, the No. 2 lens barrel assembly and the No. 4 lens barrel assembly are opposite to each other, the No. 1 lens barrel assembly and the No. 3 lens barrel assembly are inclined upward, and the No. 2 lens barrel assembly and the No. 4 lens barrel assembly are inclined downward. Optionally, the No. 1 lens barrel assembly and the No. 3 lens barrel assembly are opposite to each other, the No. 2 lens barrel assembly and the No. 4 lens barrel assembly are opposite to each other, the No. 1 lens barrel assembly and the No. 3 lens barrel assembly are inclined downward, and the No. 2 lens barrel assembly and the No. 4 lens barrel assembly are inclined upward.

[0045] Through this staggered arrangement, in the width direction (left - right direction), the relative manner can reduce the space occupied by the laser radar transmitting assemblies due to the inclined setting. For example, in the width direction, the No. 1 lens barrel assembly and the No. 3 lens barrel assembly are opposite to each other, and by setting the pitch angle opposite to that of the No. 2 lens barrel assembly, the No. 1 lens barrel assembly and the No. 3 lens barrel assembly can share the space above the No. 2 lens barrel assembly. Similarly, the No. 2 lens barrel assembly and the No. 4 lens barrel assembly can share the space below the No. 3 lens barrel assembly. In the height direction (up - down direction), the back - to - back manner can contribute to the realization of space sharing.

[0046] Further, two adjacent lidar emission components 2 are installed on the installation surface in a vertically staggered manner and are in contact with each other.

[0047] Specifically, as Figure 3 shown, the positions of two adjacent lidar emission components 2 on the installation surface are not on the same horizontal plane, but two adjacent lidar emission components 2 are arranged in a staggered manner, one above the other. By arranging them in a vertically staggered and mutually contacting manner, the width occupied by the lidar emission components 2 in the horizontal direction can be shortened. Optionally, the positions of two spaced-apart lidar emission components 2 on the installation surface are on the same horizontal plane.

[0048] In a specific example, usually, the width of the radar mounting bracket 3 is determined by the width of the circuit board of the laser anemometry device. Then, when the width of the radar mounting bracket 3 is determined, the height difference between two adjacent lidar emission components 2 in the vertical direction can be determined in combination with the diameter of the lidar emission components 2. The increase in the height difference is associated with the decrease in the width of the radar mounting bracket 3.

[0049] Wherein, the height, width, and thickness of the hollow cavity are associated with the first included angle and the second included angle.

[0050] For example, the included angles of the No. 1 barrel assembly, No. 2 barrel assembly, No. 3 barrel assembly, and No. 4 barrel assembly with the horizontal plane and the vertical plane are (x°, -y°), (-x°, -y°), (x°, y°), (-x°, y°) respectively; the outer diameter of the barrel assembly is d, the length L (the inner side dimension of the barrel relative to the vertical plane protruding from the installation surface), and the length L1 (the inner side dimension of the barrel relative to the horizontal plane protruding from the installation surface); it is assumed that the length, width, and height of the space occupied by the four barrel assemblies are A, B, and C respectively.

[0051] Wherein, based on the arrangement of the barrel assemblies, the height and width of the hollow cavity are mutually related. When the width of the hollow cavity is set to a target value, the height of the hollow cavity can be determined based on the first included angle, the second included angle, and the dimensions of the barrel assembly. Similarly, when the height of the hollow cavity is set to a target value, the width of the hollow cavity can be determined based on the first included angle, the second included angle, and the dimensions of the barrel assembly. And, usually, this target value is usually taken as the minimum value. Then the corresponding other parameter can also be determined as the minimum value.

[0052] For example, when it is required that the value of C is the minimum value: When d / cosy° ≤ 2Lsiny°, Amin = 2Lsiny° + 3d / cosy°; When d / cosy° > 2Lsiny°, Amin = 3Lsiny° + 2.5d / cosy°.

[0053] Among them, judging the value relationship between d / cosy° and 2Lsiny° is to determine which of the length and diameter of the lens barrel assembly is the main parameter affecting the space occupied by the lens barrel assembly. When d / cosy° ≤ 2Lsiny°, the influence of the length of the lens barrel assembly is greater than that of the diameter. When d / cosy° > 2Lsiny°, the influence of the diameter of the lens barrel assembly is greater than that of the length.

[0054] Similarly, when the value of A is required to be the minimum: Cmin = 2L1sinx° + 2dcosx° + 2d / cosx°.

[0055] The thickness B of the hollow cavity is only related to the first included angle, the second included angle and the size of the lens barrel assembly, and the minimum value of the thickness B is the maximum value of B = Lcosy° + dsiny° and Bmin = L1cosx°. That is, when the value of B = Lcosy° + dsiny° is greater than B = L1cosx°, the minimum value of the thickness B is Bmin = Lcosy° + dsiny°.

[0056] Among them, the thickness B depends on the installation method of the lens barrel assembly relative to the installation surface. When B = Lcosy° + dsiny°, it can be approximately regarded that the tail of the lens barrel assembly is flush with the installation surface. When B = L1cosx°, the lens barrel assembly can be installed on the installation surface through the side wall of the lens barrel assembly.

[0057] In a specific example, x = 12.5°, y = 15°, d = 60mm, L = 127mm, L1 = 142mm. Since the overall length is controlled by other devices on the base and the width of the radar mounting bracket 3 is determined by the circuit board width of the laser anemometry device, the height (C) is set to the minimum value as the goal.

[0058] Based on d / cosy° = 62.12mm, 2Lsiny° = 65.74, d / cosy° < 2Lsiny°, therefore, Amin = 2Lsiny° + 3d / cosy° = 252.09mm. Considering manufacturability and assembly issues, A = 268mm can be determined. Under this condition, when 4 lens barrels are arranged in the space of A value, C = 147mm can be obtained.

[0059] Based on Lcosy° + dsiny° = 138.2mm, L1cosx° = 138.64mm, Lcosy° + dsiny < L1cosx°, therefore, Bmin = L1cosx° = 138.64mm. Considering manufacturability, B = 140mm is determined.

[0060] In a specific example, as Figure 4 shown, it includes: At least three horizontal adjustment components 30, the horizontal adjustment components 30 support the housing 1 from the bottom, and the horizontal adjustment components 30 are not simultaneously arranged on the same straight line. The height of the horizontal adjustment components 30 along the vertical direction is adjustable to adjust the angle between the housing 1 and the horizontal plane; The first adapter plate 40, the first adapter plate 40 is connected to the bottom of the housing 1, and the horizontal adjustment component 30 is supported and connected to the first adapter plate 40.

[0061] Among them, three points can determine a plane. Then, the three horizontal adjustment components 30 adjust their heights respectively to determine the extension direction of the bottom surface of the housing 1, that is, the angle with the horizontal plane. Optionally, the horizontal inclination sensor arranged in the housing can be arranged within the range enclosed by the three horizontal adjustment components 30.

[0062] Specifically, each horizontal adjustment component 30 includes: The support base 31, the support base 31 is fixed to the surface of the carrier; The screw 32, the screw 32 extends along the vertical direction. The bottom of the screw 32 is rotationally supported around the vertical direction by the support base 31, and the top is threadedly connected to the first adapter plate 40; The first nut 33, the first nut is in threaded cooperation with the screw 32, and locks or unlocks the screw 32 and the first adapter plate 40 by abutting against or disengaging from the first adapter plate 40; The second nut 34, the second nut 34 is in threaded cooperation with the screw 32, and locks or unlocks the screw 32 and the support base 31 by the second nut 34 abutting against or disengaging from the top surface of the support base 31; Among them, the distance between the first adapter plate 40 and the support base 31 forms the height of the horizontal adjustment component 30.

[0063] Furthermore, each horizontal adjustment component 30 includes: The third nut 35, the third nut 35 is in threaded cooperation with the screw 32 and abuts against the bottom surface of the support base 31.

[0064] As Figure 4 shown, a single horizontal adjustment component 30 is composed of a support base, a screw and 3 nuts. One end of the horizontal adjustment component is matched with the thread on the host adapter plate through the thread on the screw, and the other end, the support base and the bracket adapter plate are fixed by screws. Among them, the third nut and the screw are fixedly welded.

[0065] Among them, the third nut 35 is in threaded cooperation with the screw rod 32 to form a structure that can be defined as fixed inside the support base 31. Among them, the screw rod 32 has a rotatable degree of freedom relative to the support base 31, and the screw rod 32 also has a rotatable degree of freedom relative to the first adapter plate 40. The cooperation between the second nut 34 and the third nut 35 can limit the rotational degree of freedom of the screw rod 32 relative to the support base 31, and the position of the first nut 33 on the screw rod 32 can limit the distance between the first adapter plate 40 and the support base 31.

[0066] Adjustment process: When horizontal adjustment is required, turn the second nut upward and the first nut downward. At this time, the screw rod can rotate relative to the support base, and at the same time, the height from the main machine adapter plate to the bracket adapter plate can be adjusted by rotating the screw rod. Through the height adjustment of the two horizontal adjustment components, the leveling of the device can be achieved.

[0067] Adjustment and fixation: After the height is adjusted, turn the first nut upward to support the main machine adapter plate, and at the same time turn the second nut downward. By pressing with the third nut, ensure that the screw rod and the support adapter plate no longer rotate.

[0068] In a specific example, as Figure 5 shown, the lidar emission component 2 includes: A lens barrel 21, and the lens barrel 21 is formed into a cylindrical shape; A lens assembly 22, and the lens assembly 22 is installed at the first end of the lens barrel 21, and the central axis of the lens barrel 21 coincides with the optical axis of the lens assembly 22; A laser emission end 23, and the laser emission end 23 is installed at the second end of the lens 21 via an optical fiber flange 24; Among them, the lens assembly 22 is fixed to the lens barrel 21 in the optical axis direction via a lens retaining ring 25, and is fixed to the lens barrel 21 in the radial direction perpendicular to the optical axis via at least one setscrew 26.

[0069] In this example, the lens assembly 22 and the lens retaining ring 25 are in threaded cooperation with the inner wall of the lens barrel 21. Among them, the inner side of the lens assembly 22 is limited by the lens barrel step surface, and the lens retaining ring 25 is located outside the lens assembly 22 to press and limit the lens assembly 22. Among them, the lens retaining ring 25 is limited in the direction of the central axis of the lens barrel 21 by threads, but is limited only by friction in the rotational direction around the central axis. Further, setscrews 26 are added to the sides of the lens assembly 22 and the lens retaining ring 25, and the setscrews 26 achieve strong fixation of the lens retaining ring 25 in the rotational direction around the central axis to ensure the reliability of lens fixation.

[0070] Specifically, the fiber optic flange 24 is installed on the lens barrel 21 via a spacing adjustment assembly 27, wherein the spacing adjustment assembly 27 is threadedly connected to the inner wall of the lens barrel 21. The fiber optic flange 24 is fixed on the optical distance adjustment assembly 27, and the optical distance adjustment assembly 27 is fixed on the lens barrel 21 by threads.

[0071] Among them, the lens barrel 21 has an annular groove 28 recessed inward along the central axis direction from the end face of the second end. The outer edge of the optical distance adjustment assembly 27 is received in the annular groove 28 and is fixedly connected to the annular groove 28 via a colloid.

[0072] An outer ring structure is added to the optical distance adjustment assembly 27, and its outer ring structure is inserted into the U-shaped groove of the lens barrel. When the distance from the fiber optic flange 24 to the lens assembly 22 is adjusted to meet the requirements through the threaded cooperation between the optical distance adjustment assembly 27 and the lens barrel 21, glue can be poured into the annular groove of the lens barrel 21, so that the fiber optic adjustment assembly 27 and the lens barrel 21 are strongly fixed, thereby ensuring that the distance from the fiber optic flange 24 to the lens assembly 22 is locked and the reliability is increased.

[0073] As can be seen from the above technical solutions, in the laser anemometry device of this embodiment, the lens barrel assembly adopts a staggered layout, effectively utilizing the structural space and reducing the overall size and weight of the machine. Further, the leveling structure of the device realizes the leveling of the device through an adjusting screw, and the operation is simple. In addition, the lens assembly in this example is fixed synchronously by a retaining ring and set screws, with high reliability, and the laser emission docking flange is provided with a threaded adjustment structure to realize fine adjustment of the distance at the fixed position. After adjustment, it is fixed by pouring glue, which is convenient for adjustment and has high reliability.

[0074] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of protection of the present application.

Claims

1. A laser anemometer, characterized in that, Comprising: A housing (1), the housing (1) forming a hollow cavity, and a detection window being provided on the front end surface of the housing (1); Four lidar emission components (2), the four lidar emission components (2) being installed in the hollow cavity via a radar mounting bracket (3), and the radar mounting bracket (3) having a mounting surface extending in the vertical direction; Wherein, the four lidar emission components (2) are arranged on the mounting surface along the width direction of the radar mounting bracket (3), and the central axes of every two adjacent lidar emission components (2) are arranged to intersect each other in the horizontal direction and / or the vertical direction, so that the light rays emitted by the four lidar emission components (2) respectively form a detection point at the target distance of the detection window, and the four detection points form a detection plane parallel to the mounting surface.

2. The laser anemometry device according to claim 1, characterized in that, The optical axis of each lidar emission component (2) has a yaw angle forming a first angle with the vertical plane and a pitch angle forming a second angle with the horizontal plane; Wherein, the pitch angles of a pair of lidar emission components (2) arranged at intervals are the same, and the yaw angles are opposite.

3. The laser anemometry device according to claim 2, wherein, The pitch angles of one pair of lidar emission components (2) arranged at intervals are configured to be inclined upward, and the pitch angles of the other pair of lidar emission components (2) arranged at intervals are configured to be inclined downward; and / or The yaw angles of a pair of lidar emission components (2) arranged at intervals are configured to be inclined towards one lidar emission component (2) between them.

4. The laser anemometry device according to claim 1, characterized in that, Two adjacent lidar emission components (2) are installed on the mounting surface in an interleaved manner in the vertical direction and are in contact with each other.

5. The laser anemometry device according to claim 2 or 3, characterized in that, The height (C), width (A), and thickness (B) of the hollow cavity are related to the first angle (y) and the second angle (x); Among them, if the target value of the set height (C) is set, when d / cosy° ≤ 2Lsiny°, A min = 2Lsiny° + 3d / cosy°, when d / cosy° > 2Lsiny°, A min = 3Lsiny° + 2.5d / cosy°; Among them, if the target value of the set width (A) is set, then C min = 2L1sinx° + 2dcosx° + 2d / cosx°; The minimum value of B is the larger one of B = Lcosy° + dsiny° or B = L1cosx°; Wherein, d is the outer diameter of the lidar emission component (2), L is the dimension of the lidar emission component (2) protruding from the mounting surface relative to the vertical plane, L1 is the dimension of the lidar emission component (2) protruding from the mounting surface relative to the horizontal plane, A min is the minimum value of the A value, C min is the minimum value of the C value.

6. The laser anemometry device according to claim 1, characterized in that Comprising: At least three horizontal adjustment components (30), the horizontal adjustment components (30) supporting the housing (1) from the bottom, and the horizontal adjustment components (30) not being arranged in the same straight line, and the height of the horizontal adjustment components (30) along the vertical direction being adjustable to adjust the angle between the housing (1) and the horizontal plane; A first adapter plate (40), the first adapter plate (40) being connected to the bottom of the housing (1), and the horizontal adjustment components (30) being supported and connected to the first adapter plate (40).

7. The laser anemometry device according to claim 6, wherein Each horizontal adjustment component (30) includes: A support seat (31), the support seat (31) being fixed to the surface of the carrier; A screw rod (32), the screw rod (32) extending in the vertical direction, the bottom of the screw rod (32) being rotatably supported around the vertical direction on the support seat (31), and the top being threadedly connected to the first adapter plate (40); A first nut (33), the first nut being in threaded cooperation with the screw rod (32), and locking or unlocking the screw rod (32) and the first adapter plate (40) by abutting against or disengaging from the first adapter plate (40); A second nut (34) that is in threaded engagement with the screw rod (32) and that causes the screw rod (32) and the support base (31) to be locked or unlocked by abutting against or disengaging from the top surface of the support base (31) via the second nut (34); wherein, the distance between the first adapter plate (40) and the support base (31) forms the height of the horizontal adjustment assembly (30).

8. The laser anemometer according to claim 7, characterized in that, Each horizontal adjustment assembly (30) includes: A third nut (35) that is in threaded engagement with the screw rod (32) and that abuts against the bottom surface of the support base (31).

9. The laser anemometry device according to claim 1, wherein, The lidar emission assembly (2) includes: A lens barrel (21) that is formed in a cylindrical shape; A lens assembly (22) that is installed at a first end of the lens barrel (21), and the central axis of the lens barrel (21) coincides with the optical axis of the lens assembly (22); A laser emission end (23) that is installed at a second end of the lens (21) via an optical fiber flange (24); wherein, the lens assembly (22) is fixed to the lens barrel (21) in the optical axis direction via a lens retaining ring (25), and is fixed to the lens barrel (21) in a radial direction perpendicular to the optical axis via at least one set screw (26).

10. The laser anemometry device according to claim 9, characterized in that, The optical fiber flange (24) is installed on the lens barrel (21) via a spacing adjustment assembly (27), wherein, the spacing adjustment assembly (27) is threadedly connected to the inner wall of the lens barrel (21), the lens barrel (21) has an annular groove (28) that is recessed inward from the end face of the second end along the central axis direction, the outer edge of the spacing adjustment assembly (27) is received in the annular groove (28), and is fixedly connected to the annular groove (28) via a colloid.

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