Ultrasonic wind speed measuring device with rain day false detection prevention function

Abstract

The application relates to the technical field of ultrasonic measurement, in particular to an ultrasonic wind measuring device with rain day false detection prevention function, which comprises a wind measuring instrument main body, the wind measuring instrument main body is connected with a top cover, the top cover is installed with a detection unit, the top cover is provided with a scraping mechanism for scraping a water film, the scraping mechanism comprises a driving unit, the driving unit is connected with a flexible scraping strip at the output end, and when the flexible scraping strip is stretched out, the cleaning working surface is closely combined with the receiving and transmitting end surface of the detection unit. Through the arrangement of the rotatable flexible scraping strip, the surface of the detection unit can be actively scraped, the generation of the water film on the surface of the detection unit can be effectively avoided by cooperating with a heating ring, and the measurement precision affected by the water film can be further reduced.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic measurement technology, and specifically to an ultrasonic wind measuring device with rain-proof function. Background Technology

[0002] An ultrasonic anemometer is a wind speed and direction measuring instrument developed based on the ultrasonic principle. It is widely used due to its advantages such as high measurement accuracy, no mechanical rotating parts, and strong environmental adaptability. In order to reduce measurement errors in rainy weather, most of them now adopt the method of placing the ultrasonic detection unit under the top cover to achieve physical rain protection. At the same time, a hydrophobic coating is sprayed on the surface of the detection unit, and the back-end software algorithm is combined to filter and correct abnormal data, thereby reducing rain interference.

[0003] When it rains, the tiny water droplets formed by rain splashes and the suspended water vapor in the air will continuously contact the transmitting and receiving surfaces of the detection unit. Although the hydrophobic coating can only reduce the adhesion of water for a short time, in heavy rain, some water marks or water films will still accumulate at the transmitting and receiving ends of the detection unit, affecting the measurement accuracy of the detection unit. The software algorithm can only filter and correct distorted data, and the compensation effect is limited, so the final measurement data still has a certain error.

[0004] Therefore, it is necessary to invent an ultrasonic wind measuring device with rain-proof function to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an ultrasonic wind measuring device with rain-proof function. By setting active wiping and passive rain protection, the device aims to reduce the water film on the surface of the detection unit and reduce measurement errors.

[0006] To achieve this objective, the present invention adopts the following technical solution: An ultrasonic anemometer with rain-resistant false detection function is provided, comprising an anemometer body connected to a top cover, a detection unit mounted on the top cover, and a scraping mechanism for scraping water film on the top cover. The scraping mechanism includes a drive unit, and a flexible scraper is connected to the output end of the drive unit. When the flexible scraper extends, its cleaning working surface is in close contact with the transceiver end face of the detection unit.

[0007] As a preferred embodiment of an ultrasonic wind measuring device with rain-proof function, the top cover is provided with a placement groove, the placement groove is provided with an elastic clamping mechanism for restricting the movement of the flexible scraper, the elastic clamping mechanism includes an installation groove in the placement groove, a slide rod is installed in the installation groove, a slider is slidably connected to the slide rod, a clamping strip is connected to the slider, and a fixing spring is sleeved on the outside of the slide rod.

[0008] As a preferred embodiment of an ultrasonic wind measuring device with rain-resistant anti-false detection function, one side of the clamping strip is inclined, and the clamping strip has multiple anti-slip textures.

[0009] As a preferred embodiment of an ultrasonic wind measuring device with rain-proof function, the placement slot is provided with a rain-blocking mechanism. The rain-blocking mechanism includes a rotating rod rotatably connected in the placement slot, a torsion spring sleeved on the outside of the rotating rod, a rain curtain connected to the rotating rod, a locking strip connected to a connecting rod, and a limiting structure for restricting the accidental rotation of the rain curtain.

[0010] As a preferred embodiment of an ultrasonic wind measuring device with rain-proof function, the limiting structure includes a locking hole connected to the rain curtain, and the connecting rod is connected to a locking block that engages with the locking hole.

[0011] As a preferred embodiment of an ultrasonic wind measuring device with rain-proof function, the inner wall of the placement groove is provided with a number of elastic protrusions along the sliding direction of the flexible scraper, and the number of elastic protrusions are arranged in an alternating pattern.

[0012] As a preferred embodiment of an ultrasonic wind measuring device with rain-proof function, the placement slot is provided with a fixing slot, and a heating wire is installed in the fixing slot.

[0013] As a preferred embodiment of an ultrasonic wind measuring device with rain-proof function, the flexible scraper is equipped with a drainage seat and has a drainage channel.

[0014] As a preferred embodiment of an ultrasonic wind measuring device with rain-proof function, a heating ring is installed on the outside of the detection unit, and a heating element is installed inside the heating ring.

[0015] As a preferred embodiment of an ultrasonic wind measuring device with rain-proof function, the detection unit is installed at the bottom of the top cover, and the cross-sectional area of ​​the top cover is larger than the cross-sectional area of ​​the main body of the wind measuring instrument.

[0016] The beneficial effects of this invention are as follows: 1. By driving the flexible scraper to actively scrape the transceiver end of the detection unit through the operation of the drive unit, combined with the passive rain protection of the device itself, the formation of a continuous water film on the surface of the detection unit by rainwater and splashing water vapor can be reduced, thereby avoiding the accuracy loss caused by the water film changing the ultrasonic propagation medium; at the same time, the heating ring covering the surface of the detection unit has a built-in heating element, which can dry the detection unit at low temperature in the case of residual fine water vapor after scraping or in light rain, further eliminating the interference of moisture on the surface of the detection unit and greatly reducing the measurement error of wind speed and wind direction in rainy weather.

[0017] 2. During the process of the flexible scraper returning to the locking position after cleaning, the staggered elastic protrusions continuously squeeze the flexible scraper, causing it to vibrate continuously to shake off the water droplets adhering to the surface. The rain curtain can then further scrape off the residual water droplets hanging on the outer wall of the detection unit. The drainage seat can catch and drain the water flowing down the surface of the flexible scraper due to gravity, effectively preventing water from dripping back onto the surface of the detection unit and causing secondary water contamination. At the same time, after the flexible scraper is completely locked, the heating wire can be used to dry the residual moisture on the surface of the flexible scraper again, preventing the flexible scraper from carrying water into the next round of cleaning and ensuring a long-term stable water removal and scraping effect.

[0018] 3. The rain curtain reduces the heating space of the heating wire, which improves the drying efficiency of the flexible scraper and reduces the energy consumption of the heating wire. At the same time, the normally closed rain curtain reduces the impact of external rainwater entering the placement tank and causing corrosion to the components of the elastic clamping mechanism or the heating wire. Furthermore, after the flexible scraper has fully returned to its original position, the elastic clamping mechanism can be used to limit and hold the flexible scraper, ensuring that the flexible scraper is stationary and vibration-free, avoiding the swaying of the flexible scraper caused by strong winds, eliminating airflow turbulence interference caused by component swaying, and ensuring a stable wind measurement environment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the invention viewed from below.

[0021] Figure 2 This is a schematic diagram of a partial cross-sectional structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the top cover structure of the present invention viewed from below.

[0023] Figure 4 This is a partial cross-sectional structural diagram of the placement groove of the present invention.

[0024] Figure 5 This is the present invention. Figure 4 Enlarged structural diagram at point A in the middle.

[0025] Figure 6 This is a three-dimensional exploded view of the scraping mechanism of the present invention.

[0026] Figure 7 This is the present invention. Figure 6 Enlarged structural diagram at point B.

[0027] Figure 8 This is a schematic diagram of the flexible scraper of the present invention during the switching process from the locking position.

[0028] In the picture: 1. Top cover; 2. Detection unit; 21. Heating ring; 3. Anemometer body; 4. Sweeping mechanism; 41. Placement slot; 42. Elastic protrusion; 43. Elastic clamping mechanism; 431. Slider; 432. Mounting slot; 433. Fixing spring; 434. Slide rod; 435. Clamping strip; 44. Heating wire; 45. Shielding mechanism; 451. Connecting rod; 452. Rain curtain; 453. Torsion spring; 454. Rotating rod; 455. Clamping block; 456. Clamping hole; 46. Drive unit; 47. Flexible scraper; 471. Drainage seat; 48. Fixing slot. Detailed Implementation

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0031] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they 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, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0032] In the description of this invention, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating a connection between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] refer to Figures 1 to 8This invention provides an ultrasonic wind measuring device with rain-proof function, including a wind measuring instrument body 3, a top cover 1 connected to the top of the wind measuring instrument body 3, a detection unit 2 installed on the top cover 1, and a scraping mechanism 4 for scraping water film provided at the bottom of the top cover 1. The scraping mechanism 4 includes a drive unit 46, and a flexible scraper 47 is connected to the output end of the drive unit 46. When the flexible scraper 47 extends, its cleaning working surface is closely attached to the receiving end surface of the detection unit 2. The detection unit 2 preferably uses an ultrasonic probe, with four probes divided into two groups of opposing units, arranged symmetrically in pairs; the drive unit 46 is fixedly connected to the bottom of the top cover 1, and the drive unit 46 preferably uses a micro stepper motor, which precisely controls the rotation angle of the rotating shaft through pulse signals, thereby driving the flexible scraper 47 to precisely switch to the scraping station to scrape the transceiver end of the detection unit 2 or to lock it into the placement slot 41 for storage; the flexible scraper 47 is preferably made of polytetrafluoroethylene or methyl vinyl silicone rubber, and the scraping side in contact with the detection unit 2 is coated with a nano-ceramic fiber wear-resistant thin layer; at the same time, the surfaces of all parts of the detection unit 2 and the scraping mechanism 4 are coated with a hydrophobic coating.

[0034] Specifically, such as Figures 4 to 6 As shown, the top cover 1 has a placement groove 41, and the placement groove 41 is provided with an elastic clamping mechanism 43 for restricting the movement of the flexible scraper 47. The elastic clamping mechanism 43 includes a mounting groove 432 opened in the placement groove 41. A slide rod 434 is installed on the inner wall of the mounting groove 432. A slider 431 is slidably connected to the outer side of the slide rod 434. A clamping strip 435 is connected to one side of the slider 431. A fixing spring 433 is sleeved on the outer side of the slide rod 434.

[0035] Specifically, such as Figure 5 and Figure 6 As shown, one side of the clamping strip 435 is beveled, and the clamping strip 435 has multiple anti-slip textures.

[0036] In this embodiment, a flexible rubber strip is provided on the inner wall of the placement groove 41 near the flexible scraper 47. This allows the flexible rubber strip to flexibly limit the movement of the flexible scraper 47 when the drive unit 46 rotates and enters the placement groove 41 into the locking position, providing buffer contact during rotation and retraction. Simultaneously, when the flexible scraper 47 returns to the locking position, it causes the clamping strip 435 to slide, thereby causing the slider 431 to slide on the surface of the slide rod 434, stretching and fixing the spring 433. When the flexible scraper 47 returns to the locking position... After the strip 47 rotates into position, the elastic force of the fixed spring 433 can be used to make the clamping strip 435 elastically clamp the two sides of the flexible scraper strip 47, thereby clamping and limiting the flexible scraper strip 47 to prevent external strong winds from entering the placement groove 41 and causing the flexible scraper strip 47 to shake slightly. This prevents the airflow around the detection unit 2 from becoming unstable due to the shaking, thus ensuring that the measurement environment is not affected. When it is necessary to scrape the transceiver end of the detection unit 2, the drive unit 46 works to drive the flexible scraper strip 47 to rotate in the opposite direction.

[0037] Specifically, such as Figures 4 to 6 As shown, the placement slot 41 is provided with a rain shielding mechanism 45. The rain shielding mechanism 45 includes a rotating rod 454 rotatably connected in the placement slot 41. A torsion spring 453 is sleeved on the outside of the rotating rod 454. One end of the rotating rod 454 is connected to a rain curtain 452. A connecting rod 451 is connected to the clamping strip 435. The connecting rod 451 is provided with a limiting structure to restrict the accidental rotation of the rain curtain 452.

[0038] Specifically, such as Figure 7 As shown, the limiting structure includes a locking hole 456 connected to the rain curtain 452, and a locking block 455 that engages with the locking hole 456 is connected to one end of the connecting rod 451.

[0039] In this embodiment, during the rotation of the flexible scraper 47 to the locking position, it first contacts the rain curtain 452, causing it to rotate and drive the rotating rod 454 to rotate. Simultaneously, as the rain curtain 452 rotates, one end of it scrapes the surface of the flexible scraper 47, further reducing moisture on its surface. After the flexible scraper 47 rotates past the rain curtain 452, the spring force of the torsion spring 453 causes the rotating rod 454 to rotate, gradually returning the rain curtain 452 to its original position. Upon reaching the locking position, the clamping strip 435 slides away from the flexible scraper 47, thereby moving the connecting rod 451 and causing the locking block 455 to engage with the locking hole 456. This limits the rotation of the rain curtain 452, allowing... The rain curtain 452 will not move when subjected to external wind or a small amount of splashing rain. At the same time, the normally closed rain curtain 452 can form a smaller space with the inner wall of the placement slot 41, so that the heat of the heating wire 44 can be more concentrated in this space. When the flexible scraper 47 needs to switch the scraping position, after the flexible scraper 47 rotates and separates from the clamping strip 435 (when it just separates, the flexible scraper 47 has not yet contacted the rain curtain 452), the elastic force of the fixed spring 433 can be used to make the clamping strip 435 slide and drive the connecting rod 451 to slide back to its original position, thereby releasing the restriction on the rain curtain 452. Then the flexible scraper 47 can continue to rotate and allow the rain curtain 452 to rotate and open normally, so that it will not hinder the flexible scraper 47 from switching the scraping position.

[0040] Specifically, such as Figure 4 As shown, the inner wall of the placement groove 41 is provided with a number of elastic protrusions 42 along the sliding direction of the flexible scraper 47, and the number of elastic protrusions 42 are arranged in an alternating manner.

[0041] In this embodiment, the elastic protrusions 42 are evenly distributed on both sides of the inner wall of the placement groove 41, and the corresponding elastic protrusions 42 on both sides are staggered, so that during the rotation and locking of the flexible scraper 47, the elastic protrusions 42 will cause the flexible scraper 47 to swing back and forth, which makes it easier to shake away the water scraped on the surface of the flexible scraper 47.

[0042] Specifically, such as Figure 5 and Figure 8 As shown, a fixing groove 48 is provided in the placement groove 41, and a heating wire 44 is installed on the inner wall of the fixing groove 48. The heating wire 44 is preferably a PTC constant temperature heating wire that is fully covered with silicone rubber and sealed. It is waterproof and has a waterproof sealing joint at the lead wire, which can work stably in outdoor high humidity and splashing water environments.

[0043] In this embodiment, after the flexible scraper 47 returns to the locking position, it stops for a period of time (e.g., 1-3 seconds), and then the heating wire 44 is started to work for a period of time (working temperature 40℃-50℃, heating time 60s-120s). This effectively dries the residual moisture on the surface of the flexible scraper 47, preventing residual moisture from affecting the scraping effect on the transceiver end of the detection unit 2 in the next operation. At the same time, after the heating and drying are completed, a period of time (30s-60s) is required to allow the hot and humid air generated during drying to be completely discharged, avoiding local hot air disturbance of the horizontally opposed ultrasonic wind field and ensuring the measurement accuracy of the detection unit 2.

[0044] Specifically, such as Figure 4 and Figure 6 As shown, a drainage seat 471 is installed on the flexible scraper 47, and a drainage groove is provided on the flexible scraper 47.

[0045] In this embodiment, when the flexible scraper 47 returns to the locking position, the water on its surface will slide down its surface into the drain seat 471 under the influence of gravity, and be guided by it to drip away from the detection unit 2, so as to prevent the water on the surface of the flexible scraper 47 from dripping onto the surface of the detection unit 2 again.

[0046] Specifically, such as Figure 4 As shown, a heating ring 21 is installed on the outside of the detection unit 2, and a heating element is provided inside the heating ring 21.

[0047] In this embodiment, after light rain or scraping by the flexible scraper 47, the heating element inside the heating ring 21 (operating temperature of 30℃~38℃, heating time of 30s~60s) can be activated to eliminate the fine water marks at the transmitting and receiving ends of the detection unit 2 by heat conduction, further avoiding the influence of water vapor on its measurement accuracy. At the same time, in rainy or snowy weather, the detection unit 2 can be continuously heated at a low temperature (preferably operating temperature of 30℃) to prevent rainwater from freezing at low temperatures and forming a hard ice film.

[0048] Specifically, such as Figure 1 and Figure 2 As shown, the detection unit 2 is installed at the bottom of the top cover 1, and the cross-sectional area of ​​the top cover 1 is larger than the cross-sectional area of ​​the anemometer body 3.

[0049] In this embodiment, during rainfall, the top cover 1 can directly receive most of the falling rainwater and guide it to the outside of the device, greatly reducing the probability of rainwater splashing directly onto the top surface of the anemometer body 3, thereby reducing the impact of rainwater on the top surface of the anemometer body 3 and splashing onto the surface of the detection unit 2.

[0050] When using this invention, the main body 3 of the anemometer is installed in a suitable position. During normal operation, the top cover 1 can provide good rain protection, and the detection unit 2 is located at the bottom of the top cover 1, further reducing the impact of external rainwater. In light rain, the heating element inside the heating ring 21 can be used for intermittent cyclic heating to prevent water vapor from accumulating at the transmitting and receiving ends of the detection unit 2. In heavy rain, the drive unit 46 can be activated before the detection unit 2 is measured to make the flexible scraper 47 rotate and scrape the transmitting and receiving ends of the detection unit 2, which can effectively prevent the formation of a thick water film on the surface of the detection unit 2. After the flexible scraper 47 completes one sweep, it is rotated back to the locking position inside the placement slot 41. At this time, the elastic protrusion 42 and the rain curtain 452 can remove the water from the surface of the flexible scraper 47. Then, the heating wire 44 is activated to dry the remaining water on the surface of the flexible scraper 47. At the same time, the heating plate inside the heating ring 21 is activated to dry the water marks remaining at the transceiver end of the detection unit 2. After a period of time, the process is stopped to allow the hot and humid air to be completely discharged into the environment. Then, the detection unit 2 is used to measure wind direction, wind force, etc. That is, when the scraping mechanism 4 is working, the detection unit 2 does not perform measurement work to avoid measurement errors caused by the operation of the flexible scraper 47. After the scraping mechanism 4 stops working, there is no water film at the transceiver end of the detection unit 2, and the measurement work is then performed to ensure measurement accuracy and further reduce the measurement error rate in rainy weather. At the same time, when the flexible scraper 47 is in the locking position, it will not obstruct the transceiver end of the detection unit 2, thus not affecting the normal measurement operation of the detection unit 2.

[0051] It should be stated that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to the present invention. However, such variations, as long as they do not depart from the spirit of the present invention, should be within the scope of protection of the present invention. Furthermore, some terminology used in this specification and claims is not limiting, but merely for ease of description.

Claims

1. An ultrasonic wind measuring device with rain-resistant false detection function, characterized in that: The device includes a main body (3) of an anemometer, which is connected to a top cover (1). The top cover (1) is equipped with a detection unit (2). The top cover (1) is provided with a scraping mechanism (4) for scraping water film. The scraping mechanism (4) includes a drive unit (46). The output end of the drive unit (46) is connected to a flexible scraper (47). When the flexible scraper (47) extends, its cleaning working surface is closely attached to the receiving end face of the detection unit (2).

2. The ultrasonic wind measuring device with rain-resistant false detection function according to claim 1, characterized in that: The top cover (1) has a placement groove (41), and the placement groove (41) is provided with an elastic clamping mechanism (43) for restricting the movement of the flexible scraper (47). The elastic clamping mechanism (43) includes an installation groove (432) opened in the placement groove (41). A slide rod (434) is installed in the installation groove (432). The slide rod (434) is slidably connected to a slider (431). The slider (431) is connected to a clamping strip (435). A fixing spring (433) is sleeved on the outside of the slide rod (434).

3. The ultrasonic wind measuring device with rain-resistant false detection function according to claim 2, characterized in that: One side of the clamping strip (435) is inclined, and the clamping strip (435) has multiple anti-slip textures.

4. An ultrasonic wind measuring device with rain-resistant false detection function according to claim 2, characterized in that: The placement slot (41) is provided with a rain shielding mechanism (45), which includes a rotating rod (454) rotatably connected to the placement slot (41). A torsion spring (453) is sleeved on the outside of the rotating rod (454). The rotating rod (454) is connected to a rain curtain (452). The clamping strip (435) is connected to a connecting rod (451). The connecting rod (451) is provided with a limiting structure to restrict the accidental rotation of the rain curtain (452).

5. An ultrasonic wind measuring device with rain-resistant false detection function according to claim 4, characterized in that: The limiting structure includes a locking hole (456) connected to the rain curtain (452), and the connecting rod (451) is connected to a locking block (455) that engages with the locking hole (456).

6. An ultrasonic wind measuring device with rain-resistant false detection function according to claim 2, characterized in that: The inner wall of the placement groove (41) is provided with a number of elastic protrusions (42) along the sliding direction of the flexible scraper (47) and the number of elastic protrusions (42) are arranged in an alternating manner.

7. An ultrasonic wind measuring device with rain-resistant false detection function according to claim 2, characterized in that: A fixing groove (48) is provided in the placement groove (41), and a heating wire (44) is installed in the fixing groove (48).

8. An ultrasonic wind measuring device with rain-resistant false detection function according to claim 1, characterized in that: The flexible scraper (47) is equipped with a drainage seat (471), and the flexible scraper (47) has a drainage channel.

9. An ultrasonic wind measuring device with rain-resistant false detection function according to claim 1, characterized in that: A heating ring (21) is installed on the outside of the detection unit (2), and a heating element is provided inside the heating ring (21).

10. An ultrasonic wind measuring device with rain-resistant false detection function according to claim 1, characterized in that: The detection unit (2) is installed at the bottom of the top cover (1), and the cross-sectional area of ​​the top cover (1) is greater than the cross-sectional area of ​​the anemometer body (3).

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