Wind direction standard device system and wind direction verification method
By designing a wind direction standard device system and using a multi-hole probe to detect the airflow deflection angle and correct the turntable angle, the problems of limited accuracy and poor traceability of existing wind direction measurement methods have been solved, and high accuracy and consistency of wind direction measurement data have been achieved.
Patent Information
- Application Number
- CN202411533747.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-01-21
AI Technical Summary
The accuracy of existing wind direction measurement methods is limited by the scale interval of the standard dial and it is easy to introduce artificial errors. External environmental factors also affect the measurement accuracy, resulting in the inability to trace the wind vector value.
A wind direction standard device system is designed, including a high-precision turntable body, a corrector, a measurement standard, a wind direction sensor and a controller. The airflow deflection angle is detected through a multi-hole probe, and the airflow deflection angle is calculated through the probe collector, and is fed back to the controller to correct the turntable angle, thereby achieving traceability of the wind direction angle.
It realizes the high-precision calibration of the wind direction sensor in the wind tunnel, ensures the reliability and consistency of the wind direction measurement data, and solves the problem that the wind vector value cannot be traced to its source.
Smart Images
Figure CN119335215A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of metrology and calibration technology, and in particular to a wind direction standard device system and a wind direction calibration method. Background Art
[0002] Wind direction can be measured by instruments such as wind vane sensors, anemometers, and laser wind radars. Since the wind direction traceability system is not perfect in China, the wind direction angle measurement was previously carried out by comparing with the standard dial in accordance with the "JJG (Meteorology) 004-2011 Automatic Weather Station Wind Direction and Wind Speed Sensor Calibration Procedure". However, the standard dial usually has a fixed scale interval, which means that the accuracy of the measurement results is limited by these scales. For some application scenarios that require high-precision measurements, this method may not meet the requirements. In addition, manually reading the readings on the dial is prone to human errors, and external environmental factors such as temperature, humidity, and electromagnetic interference may affect the accuracy of the measurement. Therefore, there is an urgent need for a wind direction standard device and wind direction calibration solution that can solve the problem of wind vector values being unable to be traced. Summary of the invention
[0003] The present disclosure provides a wind direction standard device system and a wind direction calibration method. According to a first aspect of the present disclosure, a wind direction standard device system is provided, comprising a main structure, a corrector, a measurement standard, at least one wind direction sensor and a controller:
[0004] The main structure includes a high-precision turntable body and a wind direction test fixture for fixedly connecting the high-precision turntable body and at least one wind direction sensor;
[0005] The corrector is installed on the side of the main structure, and includes a multi-hole probe for collecting wind field differential pressure data, a probe collector for processing the differential pressure data and calculating the airflow deflection angle, and a pipeline for connecting the multi-hole probe and the probe collector;
[0006] The measuring standard, installed at the bottom of the main structure, includes an electronic pressure scanning valve for collecting the differential pressure data and an angle encoder for measuring the rotation angle of the high-precision turntable body;
[0007] The controller is connected to the measurement standard and is used to receive feedback information from the corrector and control the rotation of the high-precision turntable body.
[0008] According to the above aspects and any possible implementation, an implementation is further provided, wherein the high-precision turntable body comprises:
[0009] A turntable body, wherein the turntable body is provided with a central axis for achieving precise rotation;
[0010] A loop wind tunnel system comprises at least one fan and a flow guide device. The fan generates airflow and guides the airflow through the flow guide device to flow around the turntable body to form a loop wind tunnel.
[0011] According to the above aspects and any possible implementation, an implementation is further provided, wherein the high-precision turntable body comprises:
[0012] A turntable body, wherein the turntable body is provided with a central axis for achieving precise rotation;
[0013] A straight wind tunnel system, the straight wind tunnel system comprises at least one fan and a straight flow guide channel, the airflow generated by the fan directly acts on the turntable body through the straight flow guide channel to form a straight wind tunnel.
[0014] According to the above aspects and any possible implementation, there is further provided an implementation, wherein the high-precision turntable body further comprises:
[0015] A code disk is installed on the bottom surface of the test section of the loop wind tunnel system or the straight wind tunnel system. The "0 degree" mark of the code disk is aligned with the rotation axis of the wind direction sensor to measure the angle change of the wind direction sensor.
[0016] According to the aspects and any possible implementations described above, an implementation is further provided, wherein the wind direction sensor includes but is not limited to one of ZQZ-TF, EC9-1A, WMT700 or WA151.
[0017] According to the aspects described above and any possible implementation, there is further provided an implementation, wherein the angle encoder is a 7-level photoelectric shaft angle encoder.
[0018] According to a second aspect of the present disclosure, a method for wind direction verification based on the wind direction standard device system as described above is provided, comprising:
[0019] Step S1: Zero adjustment: the encoder is installed on the bottom surface of the test section of the loop wind tunnel system or the straight wind tunnel system, and the "0 degree" mark of the encoder is aligned with the rotation axis of the wind direction sensor;
[0020] Step S2: Turn to 90° laser alignment: The north scale of the wind direction sensor, the 0° scale of the turntable body and the corrector are simultaneously aligned to the code disk 90°, and the laser level outside the test section is hit on the 90° scale of the code disk for alignment;
[0021] Step S3: Return to 0° position: close the test door of the wind tunnel test section, rotate the turntable body -90°, and align the pointer with the 0° position of the code disk;
[0022] Step S4: Corrector feedback, controller zeroing: Turn on the wind tunnel motor, and when the wind speed reaches the set wind speed, collect the current airflow angle through the corrector and feed it back to the controller. The controller reversely controls the rotating turntable according to the feedback information until the airflow angle collected by the corrector is 0°;
[0023] Step S5: After the zero calibration is completed, according to the calibration procedures, the turntable is rotated to the preset calibration points in sequence, and the standard readings and the readings of the meter under test corresponding to the calibration points are recorded.
[0024] According to the above aspects and any possible implementation, an implementation is further provided, wherein the calculating the current airflow deflection angle by the probe collector according to the differential pressure data comprises:
[0025] Calculating a calibration coefficient according to the differential pressure data, wherein the calibration coefficient includes an angle coefficient and a speed coefficient;
[0026] According to the angle coefficient and the speed coefficient, the current airflow deflection angle is calculated by a fitting formula.
[0027] According to the above aspects and any possible implementation, an implementation is further provided, wherein the fitting formula is:
[0028]
[0029] Among them, C pq are the fitting coefficients, is the speed coefficient, is the angle coefficient.
[0030] The present invention provides a wind direction standard device system and a wind direction calibration method, which can realize the wind direction starting wind speed and wind direction angle of the wind direction sensor in the wind tunnel, and realize the traceability of the wind direction angle. At the same time, the present invention uses a multi-hole probe to detect the airflow deviation angle of the wind tunnel itself (the wind speed direction will have deviations at different wind speeds, different times, and different environments), and the influence of the wind direction sensor on the wind speed direction after installation. After the initial deviation angle is detected, the feedback controller corrects it to zero, which can solve the fundamental problem that the wind vector value cannot be traced, and ensure the reliability and consistency of the wind direction measurement data.
[0031] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. The accompanying drawings are used to better understand the present solution and do not constitute a limitation of the present disclosure. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, among which:
[0033] Figure 1 A schematic diagram of a wind direction standard device system according to an embodiment of the present disclosure is shown;
[0034] Figure 2 A schematic diagram of a loop wind tunnel solution according to an embodiment of the present disclosure is shown;
[0035] Figure 3 A schematic diagram of a straight-path wind tunnel solution according to an embodiment of the present disclosure is shown;
[0036] Figure 4 A flow chart of a wind direction verification method according to an embodiment of the present disclosure is shown;
[0037] Figure 5 A flow chart of wind direction sensor calibration service operations capable of implementing the embodiments of the present disclosure is shown. DETAILED DESCRIPTION
[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.
[0039] In addition, the term "and / or" in this article is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.
[0040] The present disclosure proposes a wind direction standard device system, including a main structure, a corrector, a measuring standard, at least one wind direction sensor and a controller, wherein the main structure includes a high-precision turntable main body and a wind direction test fixture for fixing the high-precision turntable main body and at least one wind direction sensor; the corrector is installed on the side of the main structure, including a multi-hole probe for collecting wind field differential pressure data, a probe collector for processing the differential pressure data and calculating the airflow deflection angle, and a pipeline for connecting the multi-hole probe and the probe collector; the measuring standard is installed at the bottom of the main structure, including an electronic pressure scanning valve for collecting the differential pressure data and an angle encoder for measuring the rotation angle of the high-precision turntable main body; the controller is connected to the measuring standard, and is used to receive feedback information from the corrector and control the rotation of the high-precision turntable main body. In this way, the wind direction angle can be traced back to ensure the reliability and consistency of the wind direction measurement data.
[0041] A specific embodiment of a wind direction standard device system provided by the present disclosure is described below in conjunction with the accompanying drawings.
[0042] Figure 1 FIG. 1 shows a schematic diagram of a wind direction standard device system according to an embodiment of the present disclosure. Figure 1 As shown, the system includes:
[0043] A main structure, a corrector, a measuring standard, at least one wind direction sensor, and a controller;
[0044] Wherein, the main structure comprises a high-precision turntable body and a wind direction test fixture for fixedly connecting the high-precision turntable body and at least one wind direction sensor;
[0045] The corrector is installed on the side of the main structure, and includes a multi-hole probe for collecting wind field differential pressure data, a probe collector for processing the differential pressure data and calculating the airflow deflection angle, and a pipeline for connecting the multi-hole probe and the probe collector;
[0046] The measuring standard, installed at the bottom of the main structure, includes an electronic pressure scanning valve for collecting the differential pressure data and an angle encoder for measuring the rotation angle of the high-precision turntable body;
[0047] The controller is connected to the measurement standard and is used to receive feedback information from the corrector and control the rotation of the high-precision turntable body.
[0048] In some embodiments, Figure 2 As shown, the high-precision turntable body includes a turntable body and a loop wind tunnel system, wherein:
[0049] The turntable body is provided with a central axis for realizing precise rotation; the loop wind tunnel system comprises at least one fan and a flow guide device, the fan generates airflow and guides the airflow to flow around the turntable body through the flow guide device to form a loop wind tunnel.
[0050] In some embodiments, Figure 3 As shown, the high-precision turntable body includes a turntable body and a straight-path wind tunnel system, wherein the turntable body is provided with a central axis for realizing precise rotation, and the straight-path wind tunnel system includes at least one fan and a straight-path guide channel, and the airflow generated by the fan directly acts on the turntable body through the straight-path guide channel to form a straight-path wind tunnel.
[0051] In some embodiments, the turntable body is a hollow turntable, which is convenient for replacing different wind direction sensors and communication lines and preventing the sensor communication lines from getting tangled.
[0052] In some embodiments, the high-precision turntable body further includes:
[0053] A code disk is installed on the bottom surface of the test section of the loop wind tunnel system or the straight wind tunnel system. The "0 degree" mark of the code disk is aligned with the rotation axis of the wind direction sensor to measure the angle change of the wind direction sensor.
[0054] In some embodiments, the angle encoder is a 7-level photoelectric axis angle encoder.
[0055] In some embodiments, a porous probe is a probe that uses multiple small holes to sense fluid pressure. Its principle is based on the Bernoulli equation and the continuity equation, and uses the pressure difference between different small holes to calculate the speed and flow direction of the fluid. According to the different number of holes and arrangement methods, the porous probe can be divided into three-hole probes, five-hole probes, seven-hole probes, etc. Before using the porous probe, it is necessary to obtain the calibration coefficient and fitting formula through experimental fitting, and then use the probe for measurement operations.
[0056] Specifically, the three-hole probe is mainly used for steady two-dimensional flow field measurement. Its measurement range is generally within ±18°. It can be divided into cylindrical, wedge and conical types. The five-hole probe is used for three-dimensional flow field measurement. Theoretically, the measurement range can reach ±40°, but in order to ensure the accuracy of the measurement value, the angle range is limited to ±30° in actual use. The seven-hole probe can also measure the three-dimensional velocity and flow direction of the fluid. In high subsonic and low subsonic measurement environments, the measurement range can reach 65° and 75° respectively.
[0057] In some embodiments, wind sensors that can be used to test the mainstream include, but are not limited to, ZQZ-TF, EC9-1A, WMT700, or WA151.
[0058] In some embodiments, the controller can effectively control the 360° horizontal rotation of the high-precision turntable. The communication mode is COM communication, and the default serial port is 9600, 8, N, 1.
[0059] In some embodiments, the measuring standard is an angle measuring device that can monitor the angle changes of the turntable body and feed back to the controller. When sending the standard for inspection, it only needs to be disassembled.
[0060] According to the embodiments of the present disclosure, the following technical effects are achieved:
[0061] The present invention provides a wind direction standard device system and a wind direction calibration method, which can realize the wind direction starting wind speed and wind direction angle of the wind direction sensor in the wind tunnel, and realize the traceability of the wind direction angle. At the same time, the present invention uses a multi-hole probe to detect the airflow deviation angle of the wind tunnel itself (the wind speed direction will have deviations at different wind speeds, different times, and different environments), and the influence of the wind direction sensor on the wind speed direction after installation. After the initial deviation angle is detected, the feedback controller corrects it to zero, which can solve the fundamental problem that the wind vector value cannot be traced, and ensure the reliability and consistency of the wind direction measurement data.
[0062] The above is an introduction to the system embodiment. The following is a method embodiment to further illustrate the solution disclosed in the present disclosure.
[0063] like Figure 4 As shown, the present disclosure provides a flow chart of a wind direction verification method, such as Figure 4 As shown, the method includes:
[0064] Step S1: Zero adjustment: the encoder is installed on the bottom surface of the test section of the loop wind tunnel system or the straight wind tunnel system, and the "0 degree" mark of the encoder is aligned with the rotation axis of the wind direction sensor;
[0065] Step S2: Turn to 90° laser alignment: The north scale of the wind direction sensor, the 0° scale of the turntable body and the corrector are simultaneously aligned to the code disk 90°, and the laser level outside the test section is hit on the 90° scale of the code disk for alignment;
[0066] Step S3: Return to 0° position: close the test door of the wind tunnel test section, rotate the turntable body -90°, and align the pointer with the 0° position of the code disk;
[0067] Step S4: Corrector feedback, controller zeroing: Turn on the wind tunnel motor, and when the wind speed reaches the set wind speed, collect the current airflow angle through the corrector and feed it back to the controller. The controller reversely controls the rotating turntable according to the feedback information until the airflow angle collected by the corrector is 0°;
[0068] Step S5: After the zero calibration is completed, according to the calibration procedures, the turntable is rotated to the preset calibration points in sequence, and the standard readings and the readings of the meter under test corresponding to the calibration points are recorded.
[0069] In some embodiments, laser alignment can be used to detect whether the wind vane and the dial are aligned when initially installed, which can help researchers ensure the correct relative position between the wind vane and the dial, thereby improving the accuracy and reliability of wind tunnel tests.
[0070] In some embodiments, collecting the current airflow deflection angle through a corrector includes: detecting the wind pressure change in the wind tunnel wind field through a porous probe to obtain the wind tunnel wind field differential pressure data; and calculating the current airflow deflection angle through a probe collector based on the differential pressure data.
[0071] In some embodiments, according to the differential pressure data, calculating the current airflow angle by the probe collector includes:
[0072] According to the differential pressure data, a calibration coefficient is calculated, wherein the calibration coefficient includes an angle coefficient and a speed coefficient; according to the angle coefficient and the speed coefficient, a current airflow deflection angle is calculated by a fitting formula.
[0073] In some embodiments, the calibrated three-hole probe only needs to measure the pressure of the three pressure measuring holes, and the airflow deflection angle can be calculated according to the characteristic curve or fitting function. Specifically, the calibration of the three-hole probe is carried out in a normal temperature wind tunnel. The general process is: install the probe on the angle displacement mechanism at the wind tunnel outlet, measure the three-hole pressure data p1, p2, p3 under different Mach numbers Ma and angles α, and the calculation formula of the calibration coefficient (speed coefficient, angle coefficient) is as follows:
[0074]
[0075] p m =(p1+p2) / 2;
[0076] In some embodiments, the fitting formula is:
[0077]
[0078] Among them, C pq are the fitting coefficients, is the speed coefficient, is the angle coefficient.
[0079] According to the embodiments of the present disclosure, the following technical effects are achieved:
[0080] The present invention provides a wind direction standard device system and a wind direction calibration method, which can realize the wind direction starting wind speed and wind direction angle of the wind direction sensor in the wind tunnel, and realize the traceability of the wind direction angle. At the same time, the present invention uses a multi-hole probe to detect the airflow deviation angle of the wind tunnel itself (the wind speed direction will have deviations at different wind speeds, different times, and different environments), and the influence of the wind direction sensor on the wind speed direction after installation. After the initial deviation angle is detected, the feedback controller corrects it to zero, which can solve the fundamental problem that the wind vector value cannot be traced, and ensure the reliability and consistency of the wind direction measurement data.
[0081] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should be aware that the present disclosure is not limited by the order of the actions described, because according to the present disclosure, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required by the present disclosure.
[0082] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the described module can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.
[0083] In the technical solution disclosed herein, the acquisition, storage and application of user personal information involved are in compliance with the provisions of relevant laws and regulations and do not violate public order and good morals.
[0084] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of this disclosure can be achieved, and this document is not limited here.
[0085] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.
Claims
1. A wind direction standard device system, comprising a main structure, a corrector, a measuring standard, at least one wind direction sensor and a controller, characterized in that: The main structure includes a high-precision turntable body and a wind direction test fixture for fixedly connecting the high-precision turntable body and at least one wind direction sensor; The corrector is installed on the side of the main structure, and includes a multi-hole probe for collecting wind field differential pressure data, a probe collector for processing the differential pressure data and calculating the airflow deflection angle, and a pipeline for connecting the multi-hole probe and the probe collector; The measuring standard, installed at the bottom of the main structure, includes an electronic pressure scanning valve for collecting the differential pressure data and an angle encoder for measuring the rotation angle of the high-precision turntable body; The controller is connected to the measurement standard and is used to receive feedback information from the corrector and control the rotation of the high-precision turntable body.
2. The wind direction standard device system according to claim 1, characterized in that: The high-precision turntable main body comprises: A turntable body, wherein the turntable body is provided with a central axis for achieving precise rotation; A loop wind tunnel system comprises at least one fan and a flow guide device. The fan generates airflow and guides the airflow through the flow guide device to flow around the turntable body to form a loop wind tunnel.
3. The wind direction standard device system according to claim 2, characterized in that: The high-precision turntable main body comprises: A turntable body, wherein the turntable body is provided with a central axis for achieving precise rotation; A straight wind tunnel system, the straight wind tunnel system comprises at least one fan and a straight flow guide channel, the airflow generated by the fan directly acts on the turntable body through the straight flow guide channel to form a straight wind tunnel.
4. The wind direction standard device system according to any one of claim 3, characterized in that: The high-precision turntable body also includes: A code disk is installed on the bottom surface of the test section of the loop wind tunnel system or the straight wind tunnel system. The "0 degree" mark of the code disk is aligned with the rotation axis of the wind direction sensor to measure the angle change of the wind direction sensor.
5. The wind direction standard device system according to claim 4, characterized in that: The wind direction sensor includes but is not limited to one of ZQZ-TF, EC9-1A, WMT700 or WA151.
6. The wind direction standard device system according to claim 1, characterized in that: The angle encoder is a 7-level photoelectric shaft angle encoder.
7. A wind direction verification method, based on the wind direction standard device system according to any one of claims 1 to 6, characterized in that: include: Step S1: Zero adjustment: install the code disk on the bottom surface of the test section of the loop wind tunnel system or the straight wind tunnel system, and align the "0 degree" mark of the code disk with the rotation axis of the wind direction sensor; Step S2: Turn to 90° laser alignment: The north scale of the wind direction sensor, the 0° scale of the turntable body and the corrector are simultaneously aligned to the code disk 90°, and the laser level outside the test section is hit on the 90° scale of the code disk for alignment; Step S3: Return to 0° position: close the test door of the wind tunnel test section, rotate the turntable body -90°, and align the pointer with the 0° position of the code disk; Step S4: Corrector feedback, controller zeroing: Turn on the wind tunnel motor, and when the wind speed reaches the set wind speed, collect the current airflow angle through the corrector and feed it back to the controller. The controller reversely controls the rotating turntable according to the feedback information until the airflow angle collected by the corrector is 0°; Step S5: After the zero calibration is completed, according to the calibration procedures, the turntable is rotated to the preset calibration points in sequence, and the standard readings and the readings of the meter under test corresponding to the calibration points are recorded.
8. The wind direction verification method according to claim 7, characterized in that: The collecting of the current airflow angle by the corrector includes: The wind tunnel wind field wind pressure changes are detected by multi-hole probes to obtain the wind tunnel wind field differential pressure data; The current airflow angle is calculated by the probe collector according to the differential pressure data.
9. The wind direction verification method according to claim 8, characterized in that: Calculating the current airflow angle by a probe collector according to the differential pressure data includes: Calculating a calibration coefficient according to the differential pressure data, wherein the calibration coefficient includes an angle coefficient and a speed coefficient; According to the angle coefficient and the speed coefficient, the current airflow deflection angle is calculated by a fitting formula.
10. The wind direction verification method according to claim 9, characterized in that: The fitting formula is: Among them, C pq are the fitting coefficients, is the speed coefficient, is the angle coefficient.
Citation Information
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