Ultrasonic wind meter

Abstract

The utility model relates to an ultrasonic anemoscope, which comprises an anemoscope body, a reflection unit and a rain scattering piece, and is characterized in that the anemoscope body and the reflection unit are oppositely arranged, and the anemoscope body is provided with an ultrasonic transmitter for transmitting ultrasonic waves towards the reflection unit and an ultrasonic receiver for receiving the ultrasonic waves reflected by the reflection unit; a plurality of drainage grooves are formed in one side, facing the anemoscope body, of the reflection unit, and each drainage groove extends to the edge of the reflection unit; the rain scattering piece covers the side, facing the wind meter body, of the reflection unit and covers the drainage groove, and the rain scattering piece is in a grid shape. According to the application, rainwater scattered by the rainwater scattering part is gathered and discharged through the arrangement of the drainage groove, so that the influence of the rainwater on the detection result of the ultrasonic anemometer is reduced.

Description

Technical Field

[0001] The present application relates to the field of meteorological measurement equipment, and in particular to an ultrasonic anemometer. Background Art

[0002] Wind monitoring is a parameter in meteorological monitoring.

[0003] In related technologies, ultrasonic waves are used to measure wind speed, usually by using an ultrasonic transmitter to send ultrasonic waves to a transmitting unit, and then a receiver receives the ultrasonic waves reflected by the transmitting unit, and measures the wind speed and direction by the time difference of the ultrasonic waves propagating in the air.

[0004] The reflection of ultrasonic waves by the transmitting unit will directly affect the measurement accuracy. Ultrasonic wind meters are used in outdoor environments, and rain will have a significant impact on the transmitting unit, affecting the measurement results. Utility Model Content

[0005] The present application provides an ultrasonic anemometer to reduce the impact of rain on the detection results of the ultrasonic anemometer.

[0006] The present application provides an ultrasonic anemometer, comprising an anemometer body, a reflective unit, and a rain scattering member, wherein the anemometer body and the reflective unit are arranged opposite to each other, and the anemometer body is provided with an ultrasonic transmitter for transmitting ultrasonic waves toward the reflective unit and an ultrasonic receiver for receiving ultrasonic waves reflected by the reflective unit;

[0007] A plurality of drainage grooves are provided on a side of the reflection unit facing the anemometer body, each of the drainage grooves extending to an edge of the reflection unit;

[0008] The rain scattering piece covers the side of the reflecting unit facing the anemometer body and covers the drainage groove, and the rain scattering piece is in a grid shape.

[0009] Furthermore, the plurality of drainage grooves are arranged at intervals; and the plurality of drainage grooves are arranged around the center of the reflection unit.

[0010] Furthermore, the depth of the drainage groove gradually increases from the center of the reflecting unit to the edge of the reflecting unit;

[0011] And / or, the cross-sectional dimension of the drainage groove gradually increases along the direction from the center of the reflection unit to the edge of the reflection unit.

[0012] Furthermore, the wall of the drainage groove is an arc surface;

[0013] And / or, a plurality of guide grooves are further provided on a side of the reflection unit facing the anemometer body, and the guide grooves are connected to the drainage grooves.

[0014] Furthermore, the side of the reflection unit facing the anemometer includes a central area and an edge area, the edge area is arranged around the central area; the central area protrudes toward the anemometer body; and the drainage groove is arranged in the edge area.

[0015] Furthermore, the edge area is arranged at an inclination.

[0016] Furthermore, the rain scattering member is attached to the central area;

[0017] Alternatively, there is a gap between the rain scattering piece and the central area, and the size of the gap is less than 0.6 mm.

[0018] Furthermore, the size range of the mesh holes of the rain scattering piece is 0.15-0.28 mm.

[0019] Furthermore, the rain scattering member is a metal mesh, and the edge of the metal mesh has a flange.

[0020] Furthermore, it also includes a support column, the two ends of which are respectively connected to the reflection unit and the anemometer body; and the support column presses the rain scattering piece against the reflection unit.

[0021] The above technical solution provided by this application has the following advantages compared with the existing technology:

[0022] In the technical solution of the present application, an ultrasonic transmitter transmits ultrasonic waves to a transmitting unit. The ultrasonic waves, after being reflected by the transmitting unit, are received by an ultrasonic receiver. The anemometer body analyzes the transmission information of the ultrasonic transmitter and the reception information of the ultrasonic receiver to obtain wind force detection results. In the present application, a grid-shaped rain-scattering element is provided to quickly disperse raindrops falling on the reflective unit on the surface of the reflective unit. A drainage groove is provided between the rain-scattering element and the reflective unit to reduce the thickness of the accumulated liquid on the surface of the reflective unit, thereby reducing the impact of the accumulated liquid on the detection results and improving the accuracy and precision of the ultrasonic anemometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings herein are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0024] In order to more clearly illustrate the embodiments of the present invention 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0026] Figure 1 A schematic structural diagram of an ultrasonic anemometer provided in an embodiment of the present application;

[0027] Figure 2 for Figure 1 Assembly diagram of the middle launch unit, rain scattering components, and support columns;

[0028] Figure 3 for Figure 2 Schematic diagram of the decomposition structure;

[0029] Figure 4 for Figure 2 Another decomposition structure diagram of;

[0030] Figure 5 for Figure 1 A schematic cross-sectional view of the middle launch unit and the rain scattering component;

[0031] Figure 6 This is a schematic diagram of the assembly of the emission unit and the rain scattering member in another embodiment of the present application;

[0032] Figure 7 for Figure 1 Schematic diagram of the local structure of the central rain-scattering component;

[0033] Figure 8 This is a schematic diagram of the assembly of the launch unit and the support column in another embodiment of the present application.

[0034] Description of reference numerals:

[0035] Anemometer body 1, reflection unit 2, drainage groove 2a, central area 21, edge area 22, support boss 23, rain scattering piece 3, flange 31, ultrasonic transmitter 4, support column 6, gap (A), fixing point B. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0038] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0039] Ultrasonic anemometers are usually used outdoors, where raindrops fall onto the reflector unit and take on a hemispherical shape due to surface tension.

[0040] Surface tension is the tension acting on any boundary along the surface of a liquid due to the uneven attraction of molecules on the surface. Generally, the forces acting on molecules at the interface are different from those acting on molecules within the liquid. Within the liquid itself, that is, within the interior of the liquid, the net force acting on a water molecule by the surrounding water molecules is zero, but the situation is different for water molecules on the surface of the liquid. Above the liquid surface is air, and the attraction of gas-phase molecules to the interfacial water molecules is less than the attraction of liquid-phase molecules within the liquid. Therefore, the net force acting on the interfacial water molecules is not zero. The direction of this net force is perpendicular to the liquid surface, pointing into the liquid, causing the liquid surface to have a tendency to shrink automatically. This contraction force is called surface tension.

[0041] Due to the surface tension of the liquid, raindrops take on a hemispherical shape, meaning they rise above the surface of the emitter. Furthermore, due to the attraction and friction between the liquid molecules and the emitter molecules, the hemispherical liquid doesn't immediately flow away. Instead, it grows larger as more liquid lands on the emitter, causing a significant amount of liquid to accumulate on the emitter. Even if the emitter could be physically tilted to a certain angle, this still wouldn't solve the problem of liquid accumulation on the emitter.

[0042] As liquid accumulates on the launch unit, it can be at a certain angle to the horizontal plane, so gravity forces the liquid to flow out of the edge of the launch unit. However, the launch unit is not completely hydrophilic, so the liquid will leave a "water mark" on the launch unit, and the "water mark" may be discontinuous.

[0043] A substance's hydrophilicity refers to its molecules, which have polar groups, showing a strong affinity for water, attracting it or dissolving in it. Simply put, the substance has a strong attraction to water, so even if the liquid flows away, some of it will remain attached to the emitter, leaving a trace.

[0044] In practice, under the influence of gravity, hydrophilicity, friction and other factors, the water mark is discontinuous, which means that after the first liquid accumulation, the path of the liquid flowing out of the emission unit may be random.

[0045] Raindrops have a certain momentum when they fall on the transmitting unit. The momentum causes splashing, which means that multiple small water droplets will be splashed. The landing points of the small water droplets are random, which makes the landing points of raindrops on the transmitting unit more random when it rains.

[0046] This randomness makes it impossible for the ultrasonic anemometer to reduce or eliminate the influence of liquid accumulation on the transmitting unit on the measurement results through predetermined algorithms and predetermined means.

[0047] The refractive index, reflectivity and absorptivity of water are different from those of air, and also different from the plane of the transmitting unit. Due to the existence of water droplets above the plane and the random accumulation of water droplets on the reflecting surface, their random shapes and heights may cause the ultrasonic path to change from reflection to scattering, resulting in a decrease in the amplitude of the echo signal and a change in the reflection path distance, leading to erroneous detection results, resulting in a large error in the detected wind speed.

[0048] In the prior art, in order to solve the above problem, a non-hydrophilic, ie, waterproof, nano-coating is applied on the upper surface of the emitting unit.

[0049] Nano coatings are non-hydrophilic substances, that is, the attraction between nano materials and water molecules is small, so applying nano coatings on the emission unit can reduce the accumulation of water molecules on the emission unit.

[0050] However, ensuring that liquid completely or even mostly accumulates on the transmitter requires a high level of nanomaterial application, typically requiring machine application. While ultrasonic anemometers are used outdoors, the transmitter can be machine-coated with a nanocoating during installation and factory delivery. However, nanocoatings have a limited lifespan, with their effectiveness diminishing after about two weeks and becoming completely ineffective within two to three months. Continuing to use a machine to apply the nanocoating would require the transmitter to be returned to the factory, which is extremely costly. Manual application also yields reduced effectiveness.

[0051] In addition, the cost of the nano coating itself is also very high, so the method of using the nano coating in the existing technology cannot solve both the cost problem and the accuracy problem of the detection results.

[0052] In order to solve the influence of rain on the detection results of ultrasonic anemometers in the prior art, the present application provides an ultrasonic anemometer to reduce the thickness of accumulated liquid on the surface of the reflecting unit, reduce the influence of accumulated liquid on the detection results, and improve the accuracy and precision of the ultrasonic anemometer.

[0053] Figure 1 An ultrasonic anemometer provided in an embodiment of the present application includes an anemometer body 1, a reflection unit 2 and a rain-scattering piece 3. The anemometer body 1 and the reflection unit 2 are arranged relative to each other. The anemometer body 1 is provided with an ultrasonic transmitter 4 for emitting ultrasonic waves toward the reflection unit 2 and an ultrasonic receiver for receiving ultrasonic waves reflected by the reflection unit 2; a plurality of drainage grooves 2a are provided on the side of the reflection unit 2 facing the anemometer body 1, and each drainage groove 2a extends to the edge of the reflection unit 2; the rain-scattering piece 3 covers the side of the reflection unit 2 facing the anemometer body 1 and covers the drainage grooves 2a, and the rain-scattering piece 3 is in a grid shape.

[0054] In this embodiment, an ultrasonic transmitter 4 transmits ultrasonic waves to a transmitting unit. After being reflected by the transmitting unit, the ultrasonic waves are received by an ultrasonic receiver. The anemometer body 1 analyzes the transmission information from the ultrasonic transmitter 4 and the reception information from the ultrasonic receiver to obtain wind force detection results. Furthermore, a grid-shaped rain-dispersing element 3 is provided to quickly disperse raindrops falling on the reflective unit 2. A drainage groove 2a is provided between the rain-dispersing element 3 and the reflective unit 2 to reduce the thickness of accumulated liquid on the surface of the reflective unit 2, thereby reducing the impact of accumulated liquid on the detection results and improving the accuracy and precision of the ultrasonic anemometer.

[0055] In the technical solution of this embodiment, the mesh size of the rain scattering element 3 ranges from 0.15 to 0.28 mm, that is, the mesh size of the rain scattering element 3 is smaller than the diameter of a raindrop and larger than the diameter of a water molecule. In this embodiment, the rain scattering element 3 is a metal mesh with a mesh size of 70 to 100.

[0056] It's understandable that the rain-dispersing element 3 has a certain thickness. Furthermore, the mesh holes in the element are much smaller than a raindrop's diameter but larger than a water molecule's. This results in different forces acting on the raindrops landing on the mesh cover. At the mesh lines, the liquid experiences both the upward support of the mesh lines and gravity, while at the mesh holes, the liquid experiences only gravity.

[0057] The diameter of a water molecule is much smaller than the size of the mesh. Therefore, the water molecules in the liquid within the mesh holes tend to drip downward due to gravity. As raindrops accumulate on the rain scatterer 3, and because the mesh lines of the rain scatterer 3 have a certain thickness, some of the raindrops within the mesh holes will fall below the surface of the rain scatterer 3.

[0058] Some raindrops fall below the surface of the rain scattering element 3, which destroys the surface tension of the water droplets, causing the raindrops to scatter faster when falling on the reflecting unit 2 than when there is no rain scattering element 3. The flatter the raindrops are, the smaller the impact on the reflection of ultrasonic waves.

[0059] Thus, in this embodiment, a rain scattering member 3 is provided on the transmitting unit, which can disperse the raindrops more quickly and prevent the raindrops from piling up too high on the transmitting unit, thereby reducing the influence of the raindrops on the ultrasonic reflection and improving the accuracy and precision of the ultrasonic anemometer.

[0060] Among them, the rain scattering piece 3 is made of a material with high reflectivity to ultrasonic waves. In the embodiment of the present utility model, the rain scattering piece 3 is provided on the transmitting unit, which will not affect the reflection of ultrasonic waves by the reflecting unit 2. In the ultrasonic anemometer, the emission diameter of the ultrasonic transmitter 4 is at the centimeter level. Because the ultrasonic transmitter 4 is emitted at an angle and the emitted ultrasonic waves have a certain dispersion, the reflection spot of the ultrasonic waves on the reflecting unit 2 is even larger. The size and thickness of the ultrasonic grid holes are 0.1 mm or less. The grid lines can reflect ultrasonic waves, and the reflecting units 2 corresponding to the grid holes will also reflect ultrasonic waves. Even if diffuse reflection occurs, the reflecting unit 2 of the embodiment of the present utility model will still reflect most of the ultrasonic waves.

[0061] In the embodiment of the present invention, the ultrasonic path length is greater than 5 cm, while the path change caused by the thickness of the rain scattering element 3 on the reflective unit 2 is only 0.1 mm, resulting in a path error rate of less than 0.2%. The ultrasonic anemometer uses ultrasonic waves to detect wind speed and direction based on the time difference generated by the path, and the rain scattering element 3 has little effect on this time difference. Furthermore, if the grid size and thickness of the rain scattering element 3 are determined, the effect on the reflected ultrasonic wave can be determined or estimated. Therefore, the effect of the rain scattering element 3 on the detection results can be corrected, ensuring that even if the rain scattering element 3 is installed, it will not affect the detection results of the ultrasonic anemometer.

[0062] At the same time, this embodiment is provided with a drainage groove 2a below the rain scattering piece 3, which can promptly discharge the raindrops scattered by the rain scattering piece 3, reduce the thickness of the accumulated liquid on the surface of the reflecting unit 2, reduce the influence of the accumulated liquid on the detection results, and improve the accuracy and precision of the ultrasonic anemometer.

[0063] In the technical solution of this embodiment, the rain scattering member 3 is made of water-wetting material.

[0064] In an embodiment of the present invention, the area of ​​the rain-scattering piece 3 is less than or equal to the area of ​​the side of the reflecting unit 2 facing the anemometer body 1. This is because the edge of the reflecting unit 2 does not need to reflect ultrasonic waves. Therefore, the area of ​​the rain-scattering piece 3 is less than or equal to the area of ​​the reflecting unit 2, which can reduce costs.

[0065] like Figure 2 、 Figure 3 and Figure 4 As shown, in the technical solution of this embodiment, a plurality of drainage grooves 2a are arranged at intervals; the plurality of drainage grooves 2a are arranged around the center of the reflective unit 2. In this way, rainwater from all angles can be drained in time.

[0066] like Figure 4 and Figure 5 As shown, in the technical solution of this embodiment, the depth of the drainage groove 2a gradually increases along the direction from the center of the reflecting unit 2 to the edge of the reflecting unit 2. The closer to the edge of the reflecting unit, the greater the depth of the drainage groove 2a, so that the drainage groove 2a is inclined as a whole, which can speed up the flow of rainwater in the drainage groove 2a and improve the drainage efficiency.

[0067] like Figure 4 As shown, in the technical solution of this embodiment, the cross-sectional size of the drainage groove 2a gradually increases in the direction from the center of the reflecting unit 2 to the edge of the reflecting unit 2. In this way, the groove wall of the drainage groove 2a will not interfere with the flow of rainwater in the drainage groove 2a, thereby ensuring the smooth outflow of rainwater in the drainage groove 2a.

[0068] like Figure 4As shown, in the technical solution of this embodiment, the groove wall of the drainage groove 2a is an arc surface, which allows rainwater to fall smoothly when sliding down the groove wall of the drainage groove 2a, avoiding splashing of rainwater in the drainage groove 2a.

[0069] In other embodiments, the reflector unit 2 is further provided with a plurality of diversion grooves on the side facing the anemometer body 1. The diversion grooves are connected to the drainage grooves 2a. This allows rainwater that falls outside the drainage grooves 2a after passing through the rain scattering element 3 to be diverted to the drainage grooves 2a, thereby improving the efficiency of rainwater collection in the drainage grooves 2a.

[0070] like Figure 3 As shown, in the technical solution of this embodiment, the side of the reflection unit 2 facing the anemometer includes a central area 21 and an edge area 22, and the edge area 22 is arranged around the central area 21; the central area 21 protrudes toward the anemometer body 1; and the drainage groove 2a is arranged in the edge area 22.

[0071] It is understandable that, with such a design, the central area 21 is higher than the edge area 22 , which is conducive to the rainwater in the central area 21 sliding down to the drainage trough 2 a and preventing the rainwater from gathering in the central area 21 .

[0072] like Figure 3 As shown, in the technical solution of this embodiment, the edge area 22 is set at an angle, which can guide rainwater to the edge of the reflection unit 2, avoid rainwater gathering in the area near the center area 21, and reduce the impact on the reflection process.

[0073] In the technical solution of this embodiment, the rain scattering piece 3 is attached to the central area 21 .

[0074] Preferably, there is a gap A between the rain scattering piece 3 and the central area 21. In this way, it can be ensured that the rainwater scattered by the rain scattering piece 3 corresponding to the central area 21 can smoothly slide along the central area 21 to the drainage groove 2a, and the size of the gap A is less than 0.6mm. The gap A between the rain scattering piece 3 and the central area 21 should not be too large. On the one hand, it is not conducive to the fixed installation of the rain scattering piece 3. On the other hand, if the gap exceeds 0.6mm, the rainwater falling through the grid holes of the rain scattering piece 3 will have a longer distance to the central area 21, which may cause splashing when the rainwater collides with the central area 21, affecting the reflection effect.

[0075] like Figure 7 As shown, in the technical solution of this embodiment, the rain scattering member 3 is a metal mesh, and the edge of the metal mesh has a flange 31. Because the edge of the metal mesh will have burrs and scratch your hands after cutting, the metal mesh is processed with a flange 31, which can effectively solve the problem of scratching your hands.

[0076] like Figure 3 and Figure 4As shown, the technical solution of this embodiment further includes a support column, the two ends of which are respectively connected to the reflector unit 2 and the anemometer body 1; and the support column presses the rain scattering member 3 against the reflector unit 2. It can be understood that the support column serves the purpose of supporting the connection between the reflector unit 2 and the anemometer body 1, and during the installation process with the reflector unit 2, the support column will pass through the rain scattering member 3 and press the rain scattering member 3 against the reflector unit 2, thereby improving the connection stability of the rain scattering member 3.

[0077] like Figure 6 As shown, to improve the connection stability of the rain scattering member 3, in another embodiment, the edge of the rain scattering member 3 is fixedly connected to the edge of the reflective unit 2 via fixing points B. There are multiple fixing points B, which are arranged at intervals. The fixing points B are used to adhere and / or weld the rain scattering member 3 to the reflective unit 2.

[0078] In some other embodiments, the rain scattering piece 3 is snap-fitted to the reflecting unit 2 , and a snap-fit ​​socket may be designed on the edge of the reflecting unit 2 , and the rain scattering piece 3 is connected to the reflecting unit 2 by being inserted into the snap-fit ​​socket.

[0079] like Figure 7 As shown, in another embodiment, the entire edge region 22 surrounds the central region 21 and is connected to the central region 21 in a stepped manner. Thus, the entire edge region 22 acts as a drainage trough 2a. A support boss 23 is provided at the edge of the reflective unit 2. The edge of the rain scattering element 3 is fixed to the support boss 23, and the support column is connected to the support boss 23. Because the support boss 23 supports the rain scattering element 3, a gap can be maintained between the rain scattering element 3 and the edge region 22, ensuring that rainwater dispersed by the rain scattering element 3 flows smoothly along the edge region 22 to the edge of the emitting unit and is discharged.

[0080] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0081] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0083] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0084] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0085] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0086] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, as long as these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

[0087] The above description is a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An ultrasonic anemometer, characterized in that: The anemometer comprises an anemometer body (1), a reflection unit (2), and a rain scattering member (3), wherein the anemometer body (1) and the reflection unit (2) are arranged relative to each other, and the anemometer body (1) is provided with an ultrasonic transmitter (4) for transmitting ultrasonic waves toward the reflection unit (2), and an ultrasonic receiver for receiving ultrasonic waves reflected by the reflection unit (2); A plurality of drainage grooves (2a) are provided on a side of the reflection unit (2) facing the anemometer body (1), and each drainage groove (2a) extends to an edge of the reflection unit (2); The rain scattering member (3) covers the side of the reflective unit (2) facing the anemometer body (1) and covers the drainage groove (2a); the rain scattering member (3) is in a grid shape.

2. The ultrasonic anemometer according to claim 1, characterized in that: The plurality of drainage grooves (2a) are arranged at intervals; the plurality of drainage grooves (2a) are arranged around the center of the reflection unit (2).

3. The ultrasonic anemometer according to claim 1, wherein: The depth of the drainage groove (2a) gradually increases from the center of the reflecting unit (2) to the edge of the reflecting unit (2); And / or, the cross-sectional dimensions of the drainage groove (2a) gradually increase in a direction from the center of the reflection unit (2) to the edge of the reflection unit (2).

4. The ultrasonic anemometer according to claim 1, wherein: The wall of the drainage groove (2a) is in the form of an arc surface; And / or, a plurality of guide grooves are further provided on a side of the reflection unit (2) facing the anemometer body (1), and the guide grooves are connected to the drainage grooves (2a).

5. The ultrasonic anemometer according to claim 1, wherein: The side of the reflection unit (2) facing the anemometer comprises a central area (21) and an edge area (22), wherein the edge area (22) is arranged around the central area (21); the central area (21) protrudes toward the anemometer body (1); and the drainage groove (2a) is arranged in the edge area (22).

6. The ultrasonic anemometer according to claim 5, characterized in that: The edge area (22) is arranged in an inclined manner.

7. The ultrasonic anemometer according to claim 5, characterized in that: The rain scattering member (3) is attached to the central area (21); Alternatively, there is a gap between the rain scattering piece (3) and the central area (21), and the size of the gap is less than 0.6 mm.

8. The ultrasonic anemometer according to claim 1, characterized in that: The size range of the mesh holes of the rain scattering piece (3) is 0.15-0.28 mm.

9. The ultrasonic anemometer according to claim 1, characterized in that: The rain scattering member (3) is a metal mesh, and the edge of the metal mesh has a flange (31).

10. The ultrasonic anemometer according to claim 1, wherein: It also includes a support column, the two ends of which are respectively connected to the reflection unit (2) and the anemometer body (1); and the support column presses the rain scattering piece (3) against the reflection unit (2).

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