Anemoscope calibration device

Abstract

The utility model provides an anemoscope calibrating device which comprises an annular wind tunnel, an anemoscope rotating module, a three-dimensional pitot tube and a microcontroller, the anemoscope rotating module comprises a standard dial, a servo motor, a rotating speed reducer and an anemoscope clamping mechanism, and the standard dial is fixed at the bottom of an annular wind tunnel pipeline. An input shaft of the rotating speed reducer is an output shaft of the servo motor, and an output shaft of the rotating speed reducer penetrates through the standard dial and a through hole preset in the bottom of the annular wind tunnel pipeline and extends into the annular wind tunnel to be fixed with the lower end of the anemoscope clamping mechanism, and the upper end of the anemoscope clamping mechanism is used for mounting and fixing a calibrated anemoscope; the three-dimensional pitot tube is fixed to the top of the annular wind tunnel pipeline, the probe is located in the annular wind tunnel, and the three-dimensional pitot tube and the servo motor are electrically connected with the microcontroller. According to the device, the three-dimensional pitot tube is used for correcting the deviation generated by the standard wind direction of the annular wind tunnel due to the wind blocking face of the anemoscope, detection is carried out in the state closer to the actual use process of the anemoscope, and the reliability and accuracy of anemoscope detection are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind vane measurement and detection, in particular to a wind vane calibration device. Background Art

[0002] Wind speed and wind direction are important meteorological parameters, which are of great significance in many fields such as environmental monitoring, energy utilization, agricultural production, urban planning, etc. With the advancement of detection technology and the improvement of people's requirements for the environment, people's requirements for the measurement accuracy of wind speed and wind direction detection are also getting higher and higher.

[0003] Up to now, the measurement and transmission system for wind direction measurement and detection has not been established, and there are few regulations and specifications specifically for the traceability of wind vane measuring instruments. In the existing metrological verification regulations of the "Portable Three-Cup Wind Direction and Anemometer", there is only a qualitative functional check on the wind direction parameters, and no mention of quantitative detection methods and error requirements; the verification regulations of the "Automatic Weather Station Wind Direction and Speed ​​Sensor" are mainly for the verification of wind speed and direction sensors with electrical signal output; the "Ultrasonic Wind Direction and Speed ​​Measuring Instrument Calibration Specifications" are mainly for the calibration methods of ultrasonic wind direction and anemometers.

[0004] The inventor of this application has found through research that the above metrological regulations and specifications related to wind direction do not consider the key problem that the wind shielding surface of the wind vane itself will affect the measurement result of wind direction during the actual use of the wind vane. Based on the need to improve the traceability of wind direction parameter measurement, it is necessary to propose a wind vane calibration device. Utility Model Content

[0005] In view of the fact that the existing metrological regulations and specifications related to wind direction have not considered the key technical problem that the wind shielding surface of the wind vane itself will affect the wind direction measurement result during the actual use of the wind vane, the utility model provides a wind vane calibration device.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A wind vane calibration device comprises an annular wind tunnel, a wind vane rotation module, a three-dimensional pitot tube and a microcontroller. The wind vane rotation module comprises a standard dial, a servo motor, a rotary reducer and a wind vane clamping mechanism. The standard dial is fixedly arranged at the bottom of a pipe of the annular wind tunnel, the zero scale line of the standard dial is parallel to the axis of the annular wind tunnel, the input shaft of the rotary reducer is the output shaft of the servo motor, the output shaft of the rotary reducer passes through preset through holes on the standard dial and the bottom of the pipe of the annular wind tunnel and extends into the annular wind tunnel, the wind vane clamping mechanism is arranged inside the annular wind tunnel, the lower end of the wind vane clamping mechanism is fixedly connected to the output shaft of the rotary reducer extending into the annular wind tunnel, the upper end of the wind vane clamping mechanism is used to install and fix the calibrated wind vane, the three-dimensional pitot tube is fixed at the top of the pipe of the annular wind tunnel and the probe of the three-dimensional pitot tube is located in the annular wind tunnel, and the three-dimensional pitot tube and the servo motor are electrically connected to the microcontroller.

[0008] Compared with the prior art, the wind vane calibration device provided by the utility model utilizes the standard wind field provided by the annular wind tunnel to provide a stable wind field environment for the wind vane calibration, and utilizes the three-dimensional pitot tube to correct the deviation of the standard wind direction in the annular wind tunnel. Specifically, when the air in the annular wind tunnel flows through the probe of the three-dimensional pitot tube, different differential pressure values ​​may be generated at different pressure-taking holes on the three-dimensional pitot tube. By interpolating the existing three-dimensional pitot tube angle and pressure calibration curve, the spatial angle of the air flowing through the position can be obtained. This angle is the deviation effect of the windshield of the wind vane itself on the standard wind direction. The angle is corrected. Specifically, the three-dimensional pitot tube transmits this angle information to the microcontroller. The microcontroller controls the servo motor to drive the wind vane clamping mechanism to rotate to the measured angle, and the wind direction zero point in the actual detection process of the wind vane is obtained. The difference between the zero scale line of the standard dial and the rotation angle of the wind vane clamping mechanism is the actual rotation angle, that is, the standard wind direction value. The angle displayed by the wind vane is the wind direction value to be tested. If the wind vane to be tested is very accurate, the standard wind direction value and the wind direction value to be tested are very close. Based on this, the wind vane to be tested can be calibrated according to the difference between the wind direction value to be tested and the standard wind direction value. This device uses a three-dimensional pitot tube to correct the deviation caused by the wind vane's own wind shield to the standard wind direction of the annular wind tunnel, and performs detection under a state closer to the actual use process of the wind vane, thereby improving the reliability and accuracy of wind vane detection.

[0009] Furthermore, the wind vane clamping mechanism includes a base plate, the bottom of the base plate is provided with a support rod fixedly connected to the output shaft of the rotating reducer, side plates are provided on opposite sides of the base plate, a through hole is provided on the base plate next to one side plate, and a clamping plate is placed on the base plate next to the other side plate, and screws are threadedly connected between the other side plate and the clamping plate.

[0010] Furthermore, a rotation angle pointer is provided on the output shaft of the rotation reducer at the lower side of the standard degree dial. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is a schematic diagram of the structure of a wind vane calibration device.

[0012] In the figure, 1. annular wind tunnel; 2. wind vane rotation module; 21. standard dial; 22. servo motor; 23. rotation reducer; 24. wind vane clamping mechanism; 241. bottom plate; 242. support rod; 243. side plate; 244. clamping plate; 245. screw; 25. rotation angle pointer; 3. three-dimensional pitot tube; 4. wind vane. DETAILED DESCRIPTION

[0013] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0014] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0015] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] Please refer to Figure 1As shown, the utility model provides a wind vane calibration device, comprising an annular wind tunnel 1, a wind vane rotation module 2, a three-dimensional pitot tube 3 and a microcontroller (not shown in the figure), wherein the annular wind tunnel is a device for performing air experiments by using a power device to generate an airflow that is similar to the real atmospheric conditions and controllable in a specially designed pipeline, and its specific structure is well known to those skilled in the art; the wind vane rotation module 2 comprises a standard dial 21, a servo motor 22, a rotation reducer 23 and a wind vane clamping mechanism 24, wherein the standard dial 21 is fixedly arranged at the bottom of the pipeline of the annular wind tunnel 1, the zero scale line of the standard dial 21 is parallel to the axis of the annular wind tunnel 1, the standard dial 21 is used as a standard for the rotation angle, and its rotation range is 0 to 360°, the input shaft of the rotation reducer 23 is the output shaft of the servo motor 22, and the output shaft of the rotation reducer 23 passes through the standard dial 21 and the through holes preset on the bottom of the annular wind tunnel pipeline and extends into the annular wind tunnel 1, The rotating reducer 23 plays the role of reducing the rotation speed and increasing the torque between the servo motor 22 and the wind vane clamping mechanism 24. The wind vane clamping mechanism 24 is arranged inside the annular wind tunnel 1. The lower end of the wind vane clamping mechanism 24 is fixedly connected to the rotating reducer output shaft extending into the annular wind tunnel 1. The upper end of the wind vane clamping mechanism 24 installs and fixes the calibrated wind vane 4. The wind vane clamping mechanism 24 can be configured with different sizes according to different models and specifications of wind vanes, so as to fix the wind vane so that it rotates synchronously with the wind vane clamping mechanism 24; the three-dimensional pitot tube 3 is fixed on the top of the pipe of the annular wind tunnel 1 and the probe of the three-dimensional pitot tube 3 is located in the annular wind tunnel 1. The three-dimensional pitot tube is a flow calibration device, which can be used to measure air flow, pressure and temperature. Its specific structure and working principle are well known to those skilled in the art. The three-dimensional pitot tube 3 and the servo motor 22 are electrically connected to a microcontroller, and the microcontroller can be specifically implemented by an existing single-chip microcomputer or other controller.

[0017] Compared with the prior art, the wind vane calibration device provided by the utility model utilizes the standard wind field provided by the annular wind tunnel to provide a stable wind field environment for the wind vane calibration, and utilizes the three-dimensional pitot tube to correct the deviation of the standard wind direction in the annular wind tunnel. Specifically, when the air in the annular wind tunnel flows through the probe of the three-dimensional pitot tube, different differential pressure values ​​may be generated at different pressure-taking holes on the three-dimensional pitot tube. By interpolating the existing three-dimensional pitot tube angle and pressure calibration curve, the spatial angle of the air flowing through the position can be obtained. This angle is the deviation effect of the windshield of the wind vane itself on the standard wind direction. The angle is corrected. Specifically, the three-dimensional pitot tube transmits this angle information to the microcontroller. The microcontroller controls the servo motor to drive the wind vane clamping mechanism to rotate to the measured angle, and the wind direction zero point in the actual detection process of the wind vane is obtained. The difference between the zero scale line of the standard dial and the rotation angle of the wind vane clamping mechanism is the actual rotation angle, that is, the standard wind direction value. The angle displayed by the wind vane is the wind direction value to be tested. If the wind vane to be tested is very accurate, the standard wind direction value and the wind direction value to be tested are very close. Based on this, the wind vane to be tested can be calibrated according to the difference between the wind direction value to be tested and the standard wind direction value. This device uses a three-dimensional pitot tube to correct the deviation caused by the wind vane's own wind shield to the standard wind direction of the annular wind tunnel, and performs detection under a state closer to the actual use process of the wind vane, thereby improving the reliability and accuracy of wind vane detection.

[0018] As a specific example, please refer to Figure 1 As shown, the wind vane clamping mechanism 24 includes a bottom plate 241, a support rod 242 fixedly connected to the output shaft of the rotary reducer is provided at the bottom of the bottom plate 241, side plates 243 are provided on opposite sides of the bottom plate 241, a through hole is provided on the bottom plate 241 next to one side plate 243, a clamping plate 244 is placed on the bottom plate 241 next to the other side plate 243, and a screw 245 is threadedly connected to the other side plate 243 and the clamping plate 244. When the wind vane clamping mechanism 24 provided in this embodiment is used, the support rod of the calibrated wind vane 4 is first inserted into the through hole on the bottom plate 241, and then the screw 245 is rotated to clamp and fix the support rod of the wind vane 4 through the clamping plate 244 and a side plate 243, thereby completing the installation and fixation of the wind vane 4. Of course, those skilled in the art can also use other clamping mechanisms to achieve it.

[0019] As a specific example, please refer to Figure 1 As shown, a rotation angle pointer 25 is provided on the output shaft of the rotation reducer on the lower side of the standard dial 21. The rotation angle pointer 25 is aligned with the zero scale line on the standard dial 21 in the initial state. Therefore, when the servo motor 22 drives the wind vane clamping mechanism 24 to rotate to the measured angle, the specific angle of rotation can be observed by aligning the rotation angle pointer 25 with the scale line on the standard dial 21, which effectively improves the practicability of the device.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A wind vane calibration device, characterized in that: The invention comprises an annular wind tunnel, a wind vane rotating module, a three-dimensional pitot tube and a microcontroller. The wind vane rotating module comprises a standard dial, a servo motor, a rotary reducer and a wind vane clamping mechanism. The standard dial is fixedly arranged at the bottom of the pipe of the annular wind tunnel, the zero scale line of the standard dial is parallel to the axis of the annular wind tunnel, the input shaft of the rotary reducer is the output shaft of the servo motor, the output shaft of the rotary reducer passes through preset through holes on the standard dial and the bottom of the pipe of the annular wind tunnel and extends into the annular wind tunnel, the wind vane clamping mechanism is arranged inside the annular wind tunnel, the lower end of the wind vane clamping mechanism is fixedly connected to the output shaft of the rotary reducer extending into the annular wind tunnel, the upper end of the wind vane clamping mechanism is used to install and fix the calibrated wind vane, the three-dimensional pitot tube is fixed at the top of the pipe of the annular wind tunnel and the probe of the three-dimensional pitot tube is located in the annular wind tunnel, the three-dimensional pitot tube and the servo motor are electrically connected to the microcontroller.

2. The wind vane calibration device according to claim 1, characterized in that: The wind vane clamping mechanism includes a base plate, a support rod fixedly connected to the output shaft of the rotating reducer is provided at the bottom of the base plate, side plates are provided on the opposite sides of the base plate, a through hole is provided on the base plate next to one side plate, a clamping plate is placed on the base plate next to the other side plate, and screws are threadedly connected between the other side plate and the clamping plate.

3. The wind vane calibration device according to claim 1, characterized in that: A rotation angle pointer is arranged on the output shaft of the rotation reducer at the lower side of the standard degree plate.

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