Portable wind sensor field calibration device and calibration method

Abstract

This invention discloses a portable on-site calibration device and method for wind sensors. The calibration device includes an execution unit, which, from bottom to top, comprises a base, a stepper motor gear compartment, and a ring angle encoder. A fixing bracket is provided on the side of the gear compartment. A wind speed generating unit includes a horizontally continuous chamber with an air outlet at the rear end. Inside the chamber, a fan module and a honeycomb panel are arranged sequentially along the wind speed direction. The honeycomb panel has uniformly arranged, closely spaced horizontal through holes with an equivalent diameter of 4-8 mm. This invention's wind speed generating unit uses only a combination of a fan module and a honeycomb panel to output a low-speed, uniform wind field. It is compact, low-cost, and has a fully open structure. Combined with an angle scale, angle stop bar, and electromagnet, it can automatically complete the wind direction sensor calibration process.

Description

Technical Field

[0001] This invention relates to the field of wind sensor calibration technology, specifically a field calibration device. Background Technology

[0002] The calibration of wind sensors mainly involves the following methods: CN222506588U describes a wind speed and direction calibration device based on a straight-path wind tunnel. The operating components, such as the scale, are located outside the wind tunnel and are rotated manually. This system needs to be installed inside the wind tunnel, resulting in high construction costs and requiring manual operation throughout the process.

[0003] CN119335215A discloses a wind direction standard device system and a wind direction calibration method, which can automatically realize the traceability of wind direction angle of wind sensor in wind tunnel. The system needs to be installed in wind tunnel, the system construction cost is high, and the calibration of wind speed of wind vane start-up still needs to be performed manually.

[0004] In 2025, JJG 1211-2025, the Verification Procedure for Wind Sensors of Automatic Weather Stations, was released. It requires that wind sensors be tested for starting wind speed and wind direction angle in a wind field environment of 5 m / s. Existing technical solutions mostly utilize existing meteorological wind tunnels in laboratories (with wind speed limits of 30 m / s, 40 m / s, and 70 m / s). The test equipment including the wind tunnel is expensive, and the entire sensor is located inside the closed wind tunnel during wind direction testing, which is not convenient for testing the wind vane starting wind speed (the wind vane needs to be manually deflected to two initial angles of 15° and 345° respectively). Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a portable wind sensor field calibration device and calibration method, which facilitates the on-site verification and calibration of the wind sensor for the start-up wind speed item.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: This invention first provides a portable wind sensor field calibration device, comprising: The execution unit, from bottom to top, includes a base, a stepper motor, a gearbox, and a ring angle encoder. The ring angle encoder includes an encoder body and a mounting ring located above the encoder body and rotating relative to it. The gearbox has a vertical through hole, and the encoder body is fixedly connected to the upper surface of the gearbox. A hollow shaft passes through the ring angle encoder and the vertical through hole of the gearbox from top to bottom, and all three are coaxial. The hollow shaft is connected to the ring angle encoder mounting ring through a boss in its middle, and an angle scale is provided on the surface of the boss. The wind sensor is detachably fixed to the top of the hollow shaft, and the bottom of the hollow shaft is connected to the stepper motor gear inside the gear compartment; a fixing bracket is provided on the side of the gear compartment; The wind field control unit includes a wind speed generating unit and a hot-wire anemometer. The wind speed generating unit includes a horizontally connected cabin with an air outlet at the rear end. Inside the cabin, a fan module and a honeycomb panel are arranged sequentially along the wind speed direction. The hot-wire anemometer is vertically fixed to the mounting bracket at the front end of the execution unit; as well as The control unit is connected to and controls the execution unit, wind speed generating unit, wind sensor, and hot-wire anemometer.

[0007] The present invention provides a portable wind sensor field calibration device, wherein the wind sensor is a wind direction sensor, including a wind direction sensor body and a wind vane mounted on the wind direction sensor body that can rotate in the horizontal direction. The center of the rotation plane of the wind vane coincides with the central axis of the air outlet of the cabin. The height of the air outlet of the cabin is not less than 1.5 times the height of the tail fin of the wind vane, and the width of the air outlet of the cabin is not less than 5 times the projection width of the wind vane at the air outlet of the cabin when it is deflected 15 degrees along the axial direction of the cabin.

[0008] The portable wind sensor field calibration device provided by the present invention has a honeycomb panel with uniformly arranged and closely spaced horizontal through holes, the equivalent diameter of which is 2 mm to 20 mm, and the fan module has at least two fans.

[0009] The portable wind sensor field calibration device provided by the present invention has an equivalent diameter of 4 mm to 8 mm for the horizontal through hole.

[0010] The portable wind sensor field calibration device provided by the present invention has multiple support legs detachably connected to the bottom of the cabin, and the height of the support legs is adjustable.

[0011] The portable wind sensor field calibration device provided by this invention has an angle stop bar insertion hole and an angle stop bar corresponding to the angle stop bar insertion hole on one side of the gear compartment. The perpendicular line from the angle stop bar insertion hole to the hollow shaft axis forms an angle of positive or negative 15 degrees with the wind speed direction; or An angle stop bar insertion hole and an angle stop bar corresponding to the angle stop bar insertion hole are respectively provided on both sides of the gear compartment. The perpendicular line from the angle stop bar insertion hole to the hollow shaft axis is ±15 degrees from the wind speed direction. Furthermore, the height of the angle stop bar after it is fixed in the angle stop bar insertion hole is higher than the rotation plane of the wind vane's horizontal bar.

[0012] The portable wind sensor field calibration device provided by the present invention has an electromagnet installed at the corresponding position of each angle stop bar and the wind vane bar. The wind vane is temporarily fixed on the angle stop bar by energizing the electromagnet.

[0013] The portable wind sensor field calibration device provided by the present invention further includes a metal buckle for engaging with the electromagnet, the metal buckle being detachably mounted on the crossbar of a non-ferromagnetic wind vane.

[0014] The portable wind sensor field calibration device provided by the present invention has a control unit equipped with an execution unit connection socket, a wind speed generating unit connection socket, a hot-wire anemometer connection socket, a wind direction sensor connection socket, a wind speed sensor connection socket, and a touch screen. The execution unit is connected to the execution unit connection socket by cable, the wind speed generating unit is connected to the wind speed generating unit connection socket by cable, the hot-wire anemometer is connected to the hot-wire anemometer connection socket by cable, and the wind sensor is connected to the wind direction sensor connection socket or the wind speed sensor connection socket by cable through the central hole of the hollow shaft.

[0015] The portable wind sensor field calibration device provided by the present invention further includes: The mobile terminal includes a camera; the control unit encrypts and encodes the calibration result data, and displays the encrypted calibration result on the touch screen in graphic encoding form. The mobile terminal scans the graphic encoding output by the touch screen through the camera and decrypts it, realizing encrypted transmission and information collection of calibration data.

[0016] The portable wind sensor field calibration device provided by the present invention includes a wind field control unit that further includes a fixing rod. The lower end of the fixing rod is vertically fixed to a bracket at the front end of the execution unit. The height of the fixing rod is adjustable, and the top end of the fixing rod is used to fix the wind vane.

[0017] The present invention provides a portable wind sensor field calibration device, wherein the wind sensor is a wind speed sensor, including a wind speed sensor body and a wind speed measuring component installed on the wind speed sensor body, and the measuring center point of the wind speed measuring component coincides with the central axis of the air outlet of the cabin.

[0018] This invention provides a portable wind sensor field calibration method, comprising: Verification steps for the wind direction sensor's wind vane starting wind speed: Offset the wind direction sensor's wind vane by 15 degrees along the center axis of the wind speed generator unit's outlet. The control unit controls the stepper motor of the execution unit to lock the hollow shaft rotation. The control unit controls the wind speed generator unit to gradually increase the output wind speed from zero. When the control unit detects a change in the wind direction sensor's output, it records the output value of the hot-wire anemometer as the first reading of the wind direction sensor's starting wind speed value. The control unit then controls the wind speed generator unit to stop outputting wind speed. Manually offset the wind direction sensor's wind vane by 15 degrees in the opposite direction and repeat the above steps to perform a 345-degree starting wind speed verification. The average value of each reading is taken as the wind direction sensor's wind vane starting wind speed value.

[0019] The calibration method provided by this invention further includes: Wind direction sensor angle calibration steps: After the wind speed calibration is completed, the control unit controls the wind speed generator to gradually increase the output wind speed. When the control unit detects that the output value of the hot-wire anemometer is 5 m / s, it stabilizes the wind speed output of the wind speed generator, so that the output of the hot-wire anemometer is kept within the range of (5±0.2) m / s. The wind vane of the wind direction sensor will continue to point in the direction of the wind speed. The control unit controls the stepper motor of the execution unit to start. The stepper motor drives the wind sensor to rotate through the hollow shaft. When the control unit detects that the output value of the wind sensor is 0 degrees, the control unit sets the output of the ring angle encoder to 0 degrees. The control unit controls the wind sensor to continue to rotate so that the output value of the wind sensor reaches the first preset calibration angle. The control unit records the output value of the ring angle encoder as the reading of the first wind direction calibration point. The wind sensor output value minus the output value of the ring angle encoder is the error value of the first preset calibration angle. The above steps are repeated to calibrate other preset calibration angles.

[0020] The calibration method provided by this invention includes: Wind direction sensor angle calibration steps: Adjust the height of the fixing rod to fix the position of the wind vane. The control unit controls the stepper motor of the execution unit to start. The stepper motor drives the wind direction sensor to rotate through the hollow shaft. When the control unit detects that the output value of the wind direction sensor is 0 degrees, the control unit sets the output of the ring angle encoder to 0 degrees. The control unit controls the wind direction sensor to continue rotating until the output value of the wind direction sensor reaches the first preset calibration angle. The control unit records the output value of the ring angle encoder. The output value of the wind direction sensor minus the output value of the ring angle encoder is used as the error value of the first preset calibration angle. Repeat the above steps to calibrate other preset calibration angles.

[0021] The calibration method provided by this invention includes: Wind speed sensor start-up wind speed calibration steps: The control unit controls the stepper motor of the execution unit to lock the rotation of the hollow shaft. The control unit controls the wind speed generating unit to gradually increase the output wind speed from zero. When the control unit detects a change in the output of the wind speed sensor, the control unit records the output value of the hot-wire anemometer as the start-up wind speed value of the wind speed sensor.

[0022] The calibration method provided by this invention further includes: Wind speed calibration steps for low wind speed range of wind speed sensor: After the wind speed verification is completed, the control unit controls the wind speed generating unit to continue to gradually increase the output wind speed. When the control unit detects that the output value of the hot-wire anemometer reaches the first preset calibration wind speed point, the wind speed output of the wind speed generating unit is stabilized. After the stabilization time is reached, the control unit records the output value of the hot-wire anemometer as the standard value of the first wind speed calibration point, and records the output value of the wind speed sensor as the indication value of the first wind speed calibration point. The output value of the wind speed sensor minus the output value of the hot-wire anemometer is used as the error value of the first wind speed calibration point. The above steps are repeated to calibrate other preset wind speed calibration points.

[0023] Beneficial effects of this invention: 1. The wind speed generating unit of the device of the present invention uses only a combination of fan module and honeycomb plate to output a low-speed uniform wind field. It is small in size and low in cost. With a fully open structure, it can automatically complete the wind direction sensor calibration process when combined with angle scale, angle stop bar and electromagnet. 2. The device of the present invention can simultaneously realize the wind speed starting speed of the wind speed sensor cup and the wind speed calibration in the low wind speed range.

[0024] 3. The device of the present invention has a compact and portable structure, a high degree of automation, and its components can be combined for use to realize the calibration of wind direction and wind speed sensors at the meteorological observation station. 4. The control unit of the device of the present invention includes a touch screen, which can output calibration results in graphic encoding form and realize the information collection of calibration data by scanning the code with a mobile terminal. Attached image description: Figure 1 This is a component diagram of a portable wind direction and speed sensor field calibration device according to the present invention; Figure 2 This is a schematic diagram of the assembly of the execution unit of the present invention; Figure 3 This is a schematic diagram of the wind speed generating unit assembly of the present invention; Figure 4 This is a front view of the fan module and honeycomb panel of the present invention; Figure 5 This is an axial view of the fan module and honeycomb panel of the present invention; Figure 6 This is a schematic diagram of the control unit of the present invention; Figure 7 This is a connection diagram of Embodiment 1 of the portable wind direction and speed sensor field calibration device of the present invention; Figure 8 This is a schematic diagram of the axial projection of the wind sensor wind vane and wind speed generating unit in Embodiment 1 of the portable wind direction and wind speed sensor field calibration device of the present invention; Figure 9 This is a connection diagram of Embodiment 2 of the portable wind direction and speed sensor field calibration device of the present invention; Figure 10 This is a schematic diagram of Embodiment 3 of the portable wind direction and speed sensor field calibration device of the present invention; Figure 11 This is a top view of some components of a portable wind direction and speed sensor field calibration device according to Embodiment 3 of the present invention; Figure 12 This is a connection diagram of Embodiment 4 of the portable wind direction and speed sensor field calibration device of the present invention; Figure 13 This is a schematic diagram of embodiment 5 of the portable wind direction and speed sensor field calibration device of the present invention.

[0025] Figure 14 This is a schematic diagram of Embodiment 6 of the portable wind direction and speed sensor field calibration device of the present invention. Attached image description: 1-Actuation unit, 11-Base, 12-Stepper motor, 13-Gear compartment, 131-Angle stop bar socket, 132-Angle stop bar, 133-First electromagnet, 134-Second electromagnet, 135-Metal buckle, 14-Ring angle encoder, 15-Hollow shaft, 151-Boss, 16-Angle dial, 17-Fixed bracket, 18-Hot wire anemometer, 19-Fixed rod, 2-Wind speed generating unit, 21-Bucket, 22-Fan module, 23-Honeycomb panel, 24-Support leg, 3-Control unit, 31-Actuation unit connection socket, 32-Wind speed generating unit connection socket, 33-Hot wire anemometer connection socket, 34-Wind direction sensor connection socket, 35-Wind speed sensor connection socket, 36-Touch screen, 4-Wind direction sensor, 5-Wind speed sensor, 6-Mobile terminal. Detailed Implementation

[0027] Example 1 like Figure 1 As shown, the portable wind sensor field calibration device of the present invention includes: an execution unit 1, a wind speed generation unit 2, a control unit 3, and a hot-wire anemometer 18.

[0028] like Figure 2As shown, the execution unit 1 includes, from bottom to top, a base 11, a stepper motor 12, a gearbox 13, and a ring angle encoder 14. The ring angle encoder 14 includes a ring angle encoder 14 body and a mounting ring located above the body and rotating relative to the body. The gearbox 13 is provided with a vertical through hole. The ring angle encoder 14 body is fixedly connected to the upper surface of the gearbox 13. A hollow shaft 15 passes through the vertical through hole of the ring angle encoder 14 and the gearbox 13 from top to bottom, and the three are coaxial. A boss 151 is provided in the middle of the hollow shaft 15. The boss 151 can be provided with multiple vertical screw holes to form a flange. The hollow shaft 15 is bolted to the mounting ring of the ring angle encoder 14 through the boss 151. An angle scale 16 is provided on the upper surface of the boss. The wind direction sensor 4 is fixed to the top of the hollow shaft 15 by fastening bolts. The bottom end of the hollow shaft 15 is connected to the stepper motor 12 gear in the gearbox 13. The gear compartment 13 is provided with a fixing bracket 17 on the side, which can vertically fix the hot wire anemometer 18 or the fixing rod 19 to the front end of the actuator 1.

[0029] like Figure 3 As shown, the wind speed generating unit 2 includes a horizontally penetrating cabin 21. Inside the cabin 21, a fan module 22 and a honeycomb panel 23 are arranged sequentially along the wind speed direction. Multiple support legs 24 are detachably connected to the bottom of the cabin 21, and the height of the support legs 24 is adjustable.

[0030] like Figure 4 and Figure 5 As shown, the fan module has no less than two fans, and the rotation axis of each fan is parallel to the axis of the compartment 21. The honeycomb panel is provided with horizontal through holes, which are hexagonal in shape. Each horizontal through hole is parallel to the axis of the compartment 21, and the equivalent diameter of the horizontal through holes can be 2 mm to 20 mm, preferably 4 mm to 8 mm.

[0031] like Figure 6 As shown, the control unit 3 is equipped with an execution unit connection socket 31, a wind speed generating unit connection socket 32, a hot wire anemometer connection socket 33, a wind direction sensor connection socket 34, a wind speed sensor connection socket 35, and a touch screen 36.

[0032] like Figure 7 As shown, when the device of the present invention is used to detect the wind direction sensor 4, the front end of the execution unit 1 is placed opposite the air outlet end of the wind speed generating unit 2 housing 21. The hot-wire anemometer 18 is fixed on the fixing bracket 17 at the front end of the execution unit 1. The wind direction sensor 4 is installed on the top of the hollow shaft 15 and secured by the mounting bolts on the wind direction sensor 4. The height of the support leg 24 of the wind speed generating unit 2 is adjusted so that the central axis of the air outlet coincides with the center of the wind vane rotation plane of the wind direction sensor 4. Figure 8As shown, the height of the air outlet of the wind speed generating unit 2 cabin 21 should not be less than 1.5 times the height of the tail fin of the wind direction sensor 4 wind vane, and the width of the air outlet of the cabin 21 should not be less than 5 times the projection width of the wind direction sensor 4 wind vane at the air outlet of the cabin 21 when it is deflected 15 degrees along the axial direction of the cabin 21.

[0033] like Figure 7 As shown, the execution unit 1 is connected to the execution unit connection socket 31 of the control unit 3 by a cable, the wind speed generating unit 2 is connected to the wind speed generating unit connection socket 32 ​​of the control unit 3 by a cable, the hot wire anemometer 18 is connected to the hot wire anemometer connection socket 33 of the control unit 3 by a cable, and the wind direction sensor 4 is connected to the wind direction sensor connection socket 34 of the control unit 3 by a cable through the center hole of the hollow shaft 15.

[0034] Verification steps for the wind direction sensor 4 wind vane start-up wind speed: Visually inspect the angle dial 16 and manually offset the wind direction sensor 4 wind vane by 15 degrees along the central axis of the air outlet of the wind speed generating unit 2. Control unit 3 controls the stepper motor 12 of the execution unit 1 to lock the rotation of the hollow shaft 15. Control unit 3 controls the wind speed generating unit 2 to gradually increase the output wind speed from zero. When control unit 3 detects a change in the output of wind direction sensor 4, control unit 3 records the output value of the hot-wire anemometer 18 as the first reading of the wind direction sensor 4 start-up wind speed value. Control unit 3 controls the wind speed generating unit 2 to stop the wind speed output. Manually offset the wind direction sensor 4 wind vane in the opposite direction by 15 degrees and repeat the above steps to perform a 345-degree start-up wind speed verification. The average value of each reading is taken as the wind direction sensor 4 wind vane start-up wind speed value.

[0035] The wind direction sensor 4 angle calibration steps are as follows: Control unit 3 controls wind speed generating unit 2 to gradually increase the output wind speed. When control unit 3 detects that the output value of hot wire anemometer 18 is 5 m / s, it stabilizes the wind speed output of wind speed generating unit 2, so that the output of hot wire anemometer 18 is kept within the range of (5±0.2) m / s. The wind vane of wind direction sensor 4 will keep pointing in the direction of the wind speed. Control unit 3 controls the stepper motor 12 of execution unit 1 to start. Stepper motor 12 drives wind direction sensor 4 to rotate through hollow shaft 15. When control unit 3 detects that the output value of wind direction sensor 4 is 0 degrees, control unit 3 sets the output of ring angle encoder 14 to 0 degrees. Control unit 3 controls wind direction sensor 4 to continue rotating so that the output value of wind direction sensor 4 reaches the first preset calibration angle. Control unit 3 records the output value of ring angle encoder 14 as the reading of the first wind direction calibration point. The output value of wind direction sensor 4 minus the output value of ring angle encoder 14 is the error value of the first preset calibration angle. The above steps are repeated to calibrate other preset calibration angles.

[0036] Example 2 like Figure 9As shown, based on Embodiment 1, in order to make the device of the present invention more portable, when it is not necessary to verify the wind speed of the wind vane and only to perform the angle calibration of the wind direction sensor 4, the fixing rod 19 can be used instead of the stable wind field generated by the wind speed generating unit 2 and the hot wire anemometer 18 used in Embodiment 1 to fix the wind vane of the wind direction sensor 4.

[0037] like Figure 9 As shown, the fixing rod 19 is fixed to the fixing bracket 17 at the front end of the execution unit 1. The top of the fixing rod 19 is provided with a groove. Adjusting the height of the fixing rod 19 allows the wind vane of the wind direction sensor 4 to be embedded in the groove of the fixing rod 19. The execution unit 1 is connected to the execution unit connection socket 31 of the control unit 3 by a cable. The wind direction sensor 4 is connected to the wind direction sensor 4 connection socket 34 of the control unit 3 by a cable through the center hole of the hollow shaft 15.

[0038] Wind direction sensor 4 angle calibration steps: Control unit 3 controls the stepper motor 12 of execution unit 1 to start. Stepper motor 12 drives wind direction sensor 4 to rotate through hollow shaft 15. When control unit 3 detects that the output value of wind direction sensor 4 is 0 degrees, control unit 3 sets the output of ring angle encoder 14 to 0 degrees. Control unit 3 controls wind direction sensor 4 to continue rotating so that the output value of wind direction sensor 4 reaches the first preset calibration angle. Control unit 3 records the output value of ring angle encoder 14. The output value of wind direction sensor 4 minus the output value of ring angle encoder 14 is used as the error value of the first preset calibration angle. Repeat the above steps to calibrate other preset calibration angles.

[0039] Example 3 like Figure 10 and Figure 11 As shown, based on Embodiment 1, the device of the present invention further includes two angle stop bar insertion holes 131 and one or two angle stop bars 132. The two angle stop bar insertion holes 131 are disposed on the upper surface of the gear compartment 13 of the execution unit 1. The perpendicular lines from the two angle stop bar insertion holes 131 to the axis of the hollow shaft 15 form angles of 15 degrees and -15 degrees with the wind speed direction, respectively.

[0040] The angle stop bar 132 is fixed at a height higher than the horizontal rotation plane of the wind direction sensor 4 after being fixed in the angle stop bar insertion hole 131.

[0041] When the wind vane is activated for wind speed detection, the angle stop lever 132 can be used to more easily offset the initial angle of the wind vane by 15 degrees and the reverse angle by 15 degrees.

[0042] Example 4 like Figure 12As shown, based on Embodiment 3, the device of the present invention further includes a first electromagnet 133 and a second electromagnet 134. Angle stop 132 is fixed to the upper surface of gear compartment 13. The height of angle stop 132 is adjustable. There are two angle stop 132. The first electromagnet 133 and the second electromagnet 134 are respectively disposed at the top of the two angle stop 132. The geometric center of the first electromagnet 133 and the second electromagnet 134 is located in the horizontal rotation plane of the wind direction sensor 4.

[0043] When the wind vane starts to detect the wind speed, the first electromagnet 133 or the second electromagnet 134 can be turned on and off by the control unit 3. When the electromagnet is turned on, it attracts the wind vane, so that the starting angle of the wind vane is automatically offset by 15 degrees or offset by 15 degrees in the opposite direction. Without the need for manual intervention, the wind direction sensor 4 can continuously execute the wind speed detection steps and the angle calibration steps of the wind direction sensor 4.

[0044] The device of the present invention also includes a metal clip 135, which is made of ferromagnetic metal. The metal clip 135 is mounted on the crossbar of the wind direction sensor 4, and is positioned on the axial side of the crossbar between the first electromagnet 133 and the second electromagnet 134. When the crossbar of the wind direction sensor 4 is made of non-ferromagnetic metal, the solution of this embodiment can be achieved by adding the metal clip 135.

[0045] Example 5 The device of this invention can also be used for the start-up wind speed verification and low-wind-speed calibration of cup-type or ultrasonic wind speed sensors. Figure 13 As shown, based on Embodiment 1, the wind speed sensor 5 is installed on the top of the hollow shaft 15 and secured with mounting bolts on the wind speed sensor 5. The height of the support leg 24 of the wind speed generating unit 2 is adjusted so that the central axis of the air outlet coincides with the center of the wind cup rotation plane / ultrasonic measurement center of the wind speed sensor 5.

[0046] like Figure 13 As shown, the wind speed generating unit 2 and the control unit 3 are connected by a cable to the wind speed generating unit connection socket 32, the hot wire anemometer 18 is connected by a cable to the hot wire anemometer connection socket 33 of the control unit 3, and the wind speed sensor 5 is connected by a cable to the wind speed sensor connection socket 35 of the control unit 3 through the center hole of the hollow shaft 15.

[0047] Wind speed sensor start-up wind speed calibration steps: Control unit 3 controls stepper motor 12 of execution unit 1 to lock the hollow shaft 15 to rotate. Control unit 3 controls wind speed generating unit 2 to gradually increase the output wind speed from zero. When control unit 3 detects a change in the output of wind speed sensor 5, control unit 3 records the output value of hot wire anemometer 18 as the wind speed sensor start-up wind speed value.

[0048] Wind speed calibration steps for low wind speed range of wind speed sensor: After the wind speed verification is completed, the control unit 3 controls the wind speed generating unit 2 to continue to gradually increase the output wind speed. When the control unit 3 detects that the output value of the hot wire anemometer 18 has reached the first preset calibration wind speed point, the wind speed output of the wind speed generating unit 2 is stabilized. After the stabilization time is reached, the control unit 3 records the output value of the hot wire anemometer 18 as the standard value of the first wind speed calibration point. The control unit 3 records the output value of the wind speed sensor 5 as the indication value of the first wind speed calibration point. The output value of the wind speed sensor 5 minus the output value of the hot wire anemometer 18 is the error value of the first wind speed calibration point. The above steps are repeated to calibrate other preset wind speed calibration points.

[0049] Example 6 like Figure 14 As shown, the device of the present invention may further include a mobile terminal 6, which includes a camera.

[0050] Based on Examples 1-5, after the calibration process is completed, the control unit 3 encrypts and encodes the calibration result data and displays the encrypted calibration result on the touch screen (36) in the form of a graphic code. The graphic code is a QR code, preferably QR Code or Data Matrix. The mobile terminal (6) scans the graphic code output by the touch screen (36) through the camera and decrypts it, thereby realizing the encrypted transmission and information collection of calibration data.

Claims

1. A portable wind sensor field calibration device, characterized in that, include: The execution unit (1) includes, from bottom to top, a base (11), a stepper motor (12), a gearbox (13), and a ring angle encoder (14). The ring angle encoder (14) includes an encoder body and a mounting ring located above the encoder body and rotating relative to the encoder body. The gearbox (13) is provided with a vertical through hole. The encoder body is fixedly connected to the upper surface of the gearbox (13). A hollow shaft (15) passes through the vertical through hole of the ring angle encoder (14) and the gearbox (13) from top to bottom, and the three are coaxial. The hollow shaft (15) is connected to the mounting ring of the ring angle encoder (14) through a boss (151) in its middle part. An angle scale (16) is provided on the surface of the boss. The wind sensor is detachably fixed to the top of the hollow shaft (15), and the bottom end of the hollow shaft (15) is connected to the gear of the stepper motor (12) in the gear compartment (13); a fixing bracket (17) is provided on the side of the gear compartment (13). The wind field control unit includes a wind speed generating unit (2) and a hot-wire anemometer (18). The wind speed generating unit (2) includes a horizontally penetrating cabin (21), with the rear end of the cabin (21) serving as an air outlet. Inside the cabin (21), a fan module (22) and a honeycomb panel (23) are arranged sequentially along the wind speed direction. The hot-wire anemometer (18) is vertically fixed to the bracket (17) at the front end of the execution unit (1); as well as The control unit (3) is connected to and controls the execution unit (1), the wind speed generating unit (2), the wind sensor and the hot-wire anemometer (18).

2. The portable wind sensor field calibration device according to claim 1, characterized in that, The wind sensor is a wind direction sensor (4), which includes a wind direction sensor body and a wind vane mounted on the wind direction sensor body that can rotate in the horizontal direction. The center of the rotation plane of the wind vane coincides with the central axis of the air outlet of the cabin (21). The height of the air outlet of the cabin (21) is not less than 1.5 times the height of the tail fin of the wind vane. The width of the air outlet of the cabin (21) is not less than 5 times the width of the wind vane projected onto the air outlet of the cabin (21) when the wind vane is deflected 15 degrees along the axial direction of the cabin (21).

3. The portable wind sensor field calibration device according to claim 1, characterized in that, The honeycomb panel (23) is uniformly and closely arranged with horizontal through holes, the equivalent diameter of which is 2 mm ~ 20 mm, and the number of fans in the fan module is at least 2.

4. The portable wind sensor field calibration device according to claim 3, characterized in that, The equivalent diameter of the horizontal through hole is 4 mm to 8 mm.

5. The portable wind sensor field calibration device according to claim 1, characterized in that, Multiple support legs (24) are detachably connected to the bottom of the cabin (21), and the height of the support legs (24) is adjustable.

6. The portable wind sensor field calibration device according to claim 1, characterized in that, An angle stop bar insertion hole (131) and an angle stop bar (132) corresponding to the angle stop bar insertion hole are provided on one side of the gear compartment (13). The perpendicular line from the angle stop bar insertion hole (131) to the axis of the hollow shaft (15) forms an angle of positive or negative 15 degrees with the wind speed direction; or An angle stop bar insertion hole (131) and an angle stop bar (132) corresponding to the angle stop bar insertion hole are respectively provided on both sides of the gear compartment (13). The perpendicular line from the angle stop bar insertion hole (131) to the axis of the hollow shaft (15) is positive and negative 15 degrees from the wind speed direction. Furthermore, the height of the angle stop bar (132) after it is fixed in the angle stop bar insertion hole (131) is higher than the horizontal rotation plane of the wind vane.

7. The portable wind sensor field calibration device according to claim 6, characterized in that, An electromagnet is provided at the position corresponding to the wind vane bar of each angle stop (132). The wind vane is temporarily fixed on the angle stop (132) by energizing the electromagnet.

8. The portable wind sensor field calibration device according to claim 7, characterized in that, It also includes a metal clip (135) for engaging with the electromagnet, the metal clip (135) being detachably mounted on the crossbar of the non-ferromagnetic wind vane.

9. The portable wind sensor field calibration device according to claim 1, characterized in that, The control unit (3) is equipped with an execution unit connection socket (31), a wind speed generating unit connection socket (32), a hot wire anemometer connection socket (33), a wind direction sensor connection socket (34), a wind speed sensor connection socket (35), and a touch screen (36). The execution unit (1) is connected to the execution unit connection socket (31) by cable, the wind speed generating unit (2) is connected to the wind speed generating unit connection socket (32) by cable, the hot wire anemometer (18) is connected to the hot wire anemometer connection socket (33) by cable, and the wind sensor is connected to the wind direction sensor connection socket (34) or the wind speed sensor connection socket (35) by cable through the center hole of the hollow shaft (15).

10. The portable wind sensor field calibration device according to claim 1, characterized in that, Also includes: The mobile terminal (6) includes a camera; the control unit (3) encrypts and encodes the calibration result data, and displays the encrypted calibration result on the touch screen (36) in the form of graphic encoding. The mobile terminal (6) scans the graphic encoding output by the touch screen (36) through the camera and decrypts it, so as to realize the encrypted transmission and information collection of calibration data.

11. The portable wind sensor field calibration device according to claim 2, characterized in that, The wind field control unit also includes a fixing rod (19), the lower end of which is vertically fixed to the card seat (17) at the front end of the execution unit (1). The height of the fixing rod (19) is adjustable, and the top of the fixing rod (19) is used to fix the wind vane.

12. The portable wind sensor field calibration device according to claim 1, characterized in that, The wind sensor is a wind speed sensor (5), which includes a wind speed sensor body and a wind speed measuring component installed on the wind speed sensor body. The measuring center point of the wind speed measuring component coincides with the central axis of the air outlet of the cabin (21).

13. A calibration method based on the portable wind sensor field calibration device according to any one of claims 1-10, characterized in that, include: Verification steps for the wind direction sensor (4) wind vane start-up wind speed: The wind direction sensor (4) wind vane is offset by 15 degrees along the central axis of the air outlet of the wind speed generating unit (2). The control unit (3) controls the stepper motor (12) of the execution unit (1) to lock the hollow shaft (15) to rotate. The control unit (3) controls the wind speed generating unit (2) to gradually increase the output wind speed from zero. When the control unit (3) detects a change in the output of the wind direction sensor (4), the control unit (3) records the output value of the hot wire anemometer (18) as the first reading of the wind direction sensor (4) start-up wind speed value. The control unit (3) controls the wind speed generating unit (2) to stop the wind speed output. The wind direction sensor wind vane is manually offset by 15 degrees in the opposite direction. The above steps are repeated to perform a 345-degree start-up wind speed verification. The average value of each reading is taken as the wind direction sensor (4) wind vane start-up wind speed value.

14. The calibration method according to claim 13, characterized in that, Also includes: Wind direction sensor (4) angle calibration steps: After the wind speed calibration is completed, the control unit (3) controls the wind speed generating unit (2) to continue to gradually increase the output wind speed. When the control unit (3) detects that the output value of the hot wire anemometer (18) is 5 m / s, the wind speed output of the wind speed generating unit (2) is stabilized so that the output of the hot wire anemometer (18) is maintained at (5 ± 0.2). In the m / s range, the wind vane of the wind direction sensor (4) will remain pointing in the direction of the wind speed. The control unit (3) controls the stepper motor (12) of the execution unit (1) to start. The stepper motor (12) drives the wind sensor to rotate through the hollow shaft (15). When the control unit (3) detects that the output value of the wind sensor is 0 degrees, the control unit (3) sets the output of the ring angle encoder (14) to 0 degrees. The control unit (3) controls the wind sensor to continue to rotate so that the output value of the wind sensor reaches the first preset calibration angle. The control unit (3) records the output value of the ring angle encoder (14) as the reading of the first wind direction calibration point. The output value of the wind sensor minus the output value of the ring angle encoder (14) is the error value of the first preset calibration angle. The above steps are repeated to calibrate other preset calibration angles.

15. A calibration method based on the portable wind sensor field calibration device according to claim 11, characterized in that, include: Wind direction sensor (4) angle calibration steps: Adjust the height of the fixing rod (19) to fix the position of the wind vane. The control unit (3) controls the stepper motor (12) of the execution unit (1) to start. The stepper motor (12) drives the wind direction sensor (4) to rotate through the hollow shaft (15). When the control unit (3) detects that the output value of the wind direction sensor (4) is 0 degrees, the control unit (3) sets the output of the ring angle encoder (14) to 0 degrees. The control unit (3) controls the wind direction sensor (4) to continue to rotate so that the output value of the wind direction sensor (4) reaches the first preset calibration angle. The control unit (3) records the output value of the ring angle encoder (14). The output value of the wind direction sensor (4) minus the output value of the ring angle encoder (14) is used as the error value of the first preset calibration angle. Repeat the above steps to calibrate other preset calibration angles.

16. A calibration method based on the portable wind sensor field calibration device according to claim 12, characterized in that, include: Wind speed sensor (5) start wind speed calibration steps: control unit (3) controls the stepper motor (12) of execution unit (1) to lock the rotation of hollow shaft (15), control unit (3) controls wind speed generating unit (2) to gradually increase the output wind speed from zero, when control unit (3) detects that the output of wind speed sensor (5) changes, control unit (3) records the output value of hot wire anemometer (18) as the wind speed sensor start wind speed value.

17. The calibration method according to claim 16, characterized in that, Also includes: Wind speed sensor (5) low wind speed range wind speed calibration steps: After the wind speed calibration is completed, the control unit (3) controls the wind speed generating unit (2) to continue to gradually increase the output wind speed. When the control unit (3) detects that the output value of the hot wire anemometer (18) reaches the first preset calibration wind speed point, the wind speed generating unit (2) stabilizes the wind speed output. After the stabilization time is reached, the control unit (3) records the output value of the hot wire anemometer (18) as the standard value of the first wind speed calibration point. The control unit (3) records the output value of the wind speed sensor (5) as the indication value of the first wind speed calibration point. The output value of the wind speed sensor (5) minus the output value of the hot wire anemometer (18) is the error value of the first wind speed calibration point. The above steps are repeated to calibrate other preset wind speed calibration points.

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