Wind direction standard device of wind direction sensor

Abstract

The utility model provides a wind direction standard device of a wind direction sensor. The device is applied to the technical field of sensor detection and comprises a wind tunnel system used for generating a wind field required by testing; the main body structure is located on one side of the wind tunnel system, and the wind direction sensor used for testing is located on the main body structure; the rotary table is rotationally connected to the fixed bottom plate, and a fixed tool is arranged on the rotary table; the wind direction testing clamp is detachably connected to the fixing tool and used for being connected with a wind direction sensor; the dial is fixedly connected to the fixed bottom plate, and the dial and the rotating center of the rotary table are coaxially arranged; and the corrector is used for acquiring the pressure difference data of the wind field of the wind tunnel system. And the measurement standard device is fixedly connected to the fixed bottom plate and is used for acquiring the pressure difference data and the rotation angle of the rotary table. In this way, the wind direction sensor provided by the utility model can effectively improve the problem of poor measurement precision in the detection process of the current wind direction sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor detection, in particular to a wind direction standard device of a wind direction sensor. Background Art

[0002] A wind direction sensor is an instrument used to measure wind direction. It typically uses mechanical, electronic, or ultrasonic technologies to detect wind direction. Mechanical wind direction sensors primarily detect changes in wind direction through the rotation of components such as a cup or vane, converting this information into an electrical output. Electronic wind direction sensors utilize microelectronics to determine wind direction by sensing wind pressure, flow velocity, and other parameters. Ultrasonic wind direction sensors utilize the propagation characteristics of ultrasonic waves in air to measure wind direction.

[0003] At present, existing wind direction sensors usually use a standard dial to measure the wind direction angle during the detection process. However, the standard dial usually has a fixed scale interval, which means that the accuracy of the measurement results is limited by these scales, resulting in insufficient measurement accuracy. Utility Model Content

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to disclose a wind direction standard device for a wind direction sensor, so as to improve the problem of poor measurement accuracy of the current wind direction sensor during the detection process.

[0005] To achieve the above-mentioned and other related purposes, the present invention discloses a wind direction standard device for a wind direction sensor, comprising:

[0006] Wind tunnel system, used to generate the wind field required for testing;

[0007] A main structure is located on one side of the wind tunnel system, and the wind direction sensor to be tested is located on the main structure, and the main structure includes:

[0008] Fixed bottom plate;

[0009] a turntable rotatably connected to the fixed base plate, and provided with a fixed tooling;

[0010] a wind direction test fixture, detachably connected to the fixed fixture and used to connect to the wind direction sensor;

[0011] a scale plate fixedly connected to the fixed base plate and coaxially arranged with the rotation center of the turntable;

[0012] a corrector for collecting pressure difference data of a wind field of the wind tunnel system; and

[0013] a measuring standard, fixedly connected to the fixed base plate, for obtaining the pressure difference data and the rotation angle of the turntable;

[0014] Wherein, a driving member is connected to the turntable, and the driving member can be used to drive the turntable to rotate.

[0015] In one embodiment of the present invention, the wind tunnel system is a straight wind tunnel system or a loop wind tunnel system.

[0016] In one embodiment of the present invention, the airflow generated by the straight wind tunnel system directly acts on the turntable.

[0017] In one embodiment of the present invention, the airflow generated by the loop wind tunnel system flows around the turntable.

[0018] In one embodiment of the present invention, a lifting mechanism is further included, which is connected to the fixed base plate, and the lifting mechanism is used to drive the main structure to adjust its height in the vertical direction.

[0019] In one embodiment of the present invention, a limit sensor is fixedly connected to the fixed base plate, and a limit block is fixedly connected to the side of the turntable;

[0020] The limit block may allow the limit sensor to be triggered.

[0021] In one embodiment of the present invention, the fixing fixture is rotatably connected to the turntable.

[0022] In one embodiment of the present invention, the corrector is located on the side of the main structure, and includes a porous probe, a probe collector, and a pipeline connected to the porous probe and the probe collector.

[0023] In one embodiment of the present invention, the scale plate is located on the bottom surface of the experimental section of the wind tunnel system, and the "0 degree" mark of the scale plate is aligned with the rotation axis of the wind direction sensor.

[0024] In one embodiment of the present invention, a controller is further included, which is electrically connected to the corrector and the measurement standard.

[0025] In summary, the present invention discloses a wind direction standard device for a wind direction sensor. The device automatically adjusts the height of a multi-hole probe to accommodate different wind direction sensors, allowing for more accurate detection of wind speed and direction at the wind vane position. The wind direction standard probe (encoder) can be quickly disassembled and sent for inspection. At the same time, by raising and lowering the entire device, different wind direction sensors can be tested in the center of the wind tunnel. The device is horizontally arranged, and its built-in level indicator facilitates checking the levelness during installation, facilitating detection of the accuracy of the wind direction sensor.

[0026] At the same time, by using a multi-hole probe to detect the wind tunnel's own airflow deviation angle (wind speed and direction will deviate at different wind speeds, at different times, and in different environments), and the impact of the wind direction sensor's installation on wind speed and direction, the feedback controller corrects the initial deviation angle to zero after detection. This can solve the fundamental problem of wind vector values ​​being unable to be traced, ensuring the reliability and consistency of wind direction measurement data. This can effectively improve the current problem of poor measurement accuracy of wind direction sensors during the detection process.

[0027] It should be understood that the contents described in the summary of the utility model are not intended to limit the key or important features of the embodiments of the utility model, nor are they intended to limit the scope of the utility model. Other features of the utility model will become easier to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other features, advantages and aspects of the various embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. The accompanying drawings are provided for a better understanding of the present invention and do not constitute a limitation of the present invention. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, among which:

[0029] Figure 1 This is a schematic structural diagram of a wind direction standard device of a wind direction sensor in one embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of an axonometric structure of a wind direction standard device of a wind direction sensor in one embodiment of the present invention;

[0031] Figure 3 This is a schematic structural diagram of a wind direction standard device of a wind direction sensor of the present invention, which uses a claw-type ultrasonic wind sensor in one embodiment;

[0032] Figure 4 for Figure 3 Schematic diagram of the structure from a top view.

[0033] Description of reference numerals:

[0034] 100, wind tunnel system; 200, main structure; 210, fixed base plate; 220, turntable; 221, fixed fixture; 222, limit sensor; 223, limit block; 230, wind direction test fixture; 240, dial;

[0035] 300, corrector; 310, multi-hole probe; 320, leather tube;

[0036] 400. Measuring standards. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0039] See also Figures 1 to 4 It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of this utility model. Therefore, they have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the efficacy and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0040] See also Figures 1 to 4 The utility model discloses a wind direction standard device for a wind direction sensor, which can be used to improve the problem of poor measurement accuracy of the current wind direction sensor during the detection process.

[0041] Specifically, the wind direction standard device for a wind direction sensor provided by the present disclosure may include a wind tunnel system 100, a main structure 200, a corrector 300, and a measurement standard 400. The wind tunnel system 100 is used to generate the wind field required for testing, and the main structure 200 is located at the exit of the wind tunnel. It will be understood that the main structure 200 is positioned on the side facing the wind, and the wind direction sensor being tested is located on the main structure 200.

[0042] Furthermore, in some embodiments, the main structure 200 includes at least a fixed base plate 210, a turntable 220, a wind direction test fixture 230, and a dial 240. The turntable 220 is rotatably connected to the fixed base plate 210, and a drive member is connected between the turntable 220 and the fixed base plate 210. The drive member can be used to drive the turntable 220 to rotate. For example, in some embodiments, the drive member can be a servo motor, but this is not limited to this. The configuration of the drive member can be determined based on actual needs.

[0043] A fixing fixture 221 is provided on the turntable 220 , and the fixing fixture 221 is rotatably connected to the turntable 220 .

[0044] As will be appreciated, the wind direction test fixture 230 is detachably connected to the fixture 221 and is used to connect to a wind direction sensor. Different wind direction sensors can correspond to different wind direction test fixtures 230. By making the wind direction test fixture 230 detachable, the applicability of the device in actual use can be improved.

[0045] The fixed base plate 210 is fixedly connected to a limit sensor 222, and the side of the turntable 220 is fixedly connected to a limit block 223, which allows the limit sensor 222 to be triggered. Therefore, the limit sensor 222 can be triggered by the limit block 223 to sense the initial position of the turntable 220.

[0046] Furthermore, the dial 240 is located on the bottom surface of the test section of the wind tunnel system 100, with the "0 degree" mark on the dial 240 aligned with the rotation axis of the wind direction sensor. A pointer may be fixedly attached to the side of the fixed fixture 221, and the pointer may point to the scale value on the dial 240. It will be understood that the dial 240 and the rotation center of the fixed fixture 221 are coaxial, and the wind direction test fixture 230 is located at the centerline of the fixed fixture 221.

[0047] In some embodiments, the corrector 300 is located on one side of the main structure 200 and is used to collect pressure differential data of the wind field of the wind tunnel system 100. A measurement standard 400 is fixedly connected to the fixed base plate 210 and is used to obtain pressure differential data and the rotation angle of the turntable 220.

[0048] Specifically, the corrector 300 includes a multi-hole probe 310, a probe collector, and a pipeline 320 connecting the multi-hole probe 310 and the probe collector. The multi-hole probe 310 is a probe that uses multiple small holes to sense fluid pressure. Its principle is based on the Bernoulli equation and the continuity equation. The pressure difference between different small holes is used to calculate the fluid speed and flow direction. Depending on the number and arrangement of holes, the multi-hole probe 310 can be divided into three-hole probes, five-hole probes, seven-hole probes, etc. Before use, the multi-hole probe 310 needs to be experimentally fitted to obtain calibration coefficients and fitting formulas, and then the probe can be used for measurement.

[0049] As will be appreciated, the device also includes a controller electrically connected to the corrector 300 and the measurement standard 400. The controller effectively controls the 360° horizontal rotation of the high-precision turntable 220. The communication mode is COM communication, with the default serial port number being 9600, 8, N, 1.

[0050] The measurement standard 400 is an angle measurement device that monitors the angle changes of the turntable 220 and provides feedback to the controller. For inspection, the standard only needs to be disassembled. Specifically, the measurement standard 400 is mounted on the bottom of the main structure 200 and includes an electronic pressure scanning valve for collecting differential pressure data and an angle encoder for measuring the rotation angle of the main body of the turntable 220. For example, in one embodiment, the angle encoder can be a 7-level optical axis angle encoder.

[0051] Specifically, during the actual use of this device, first, the scale plate 240 of the wind direction standard device is installed on the bottom surface of the wind tunnel test section, and 0° is aligned with the axial direction of the wind tunnel. Secondly, the north scale of the wind sensor, the turntable 2200° of the wind direction standard device and the corrector 300 are simultaneously aligned with the code disk 90°, and the laser level outside the test section is hit on the 90° scale of the code disk for alignment. Furthermore, the test door of the wind tunnel test section is closed, and the turntable 220 is rotated -90°, and the pointer is aligned with the 0° position of the code disk. Furthermore, the wind tunnel motor is turned on. When the wind speed reaches the set wind speed, the corrector 300 will collect the current airflow deviation angle (the airflow deviation angle of the wind tunnel itself + the airflow deviation angle caused by the wind sensor) and feed it back to the controller. The controller controls the rotation of the turntable in reverse until the airflow deviation angle measured by the corrector 300 is 0°, and the zeroing of the wind direction standard device is completed.

[0052] Furthermore, if the wind direction sensor reading is not 0° after this calibration, it is recorded as a systematic error of the wind direction sensor.

[0053] After zeroing is completed, according to the verification procedures, rotate the turntable 220 to 45°, 90°, 135°, 180°, 225°, 270°, and 315° in sequence, and record the standard readings and the readings of the meter being tested at the corresponding verification points.

[0054] Finally, the calibration results can be obtained according to the corresponding regulations and the calibration report can be exported.

[0055] It should be noted that the wind tunnel system 100 can be either a straight-path wind tunnel system 100 or a loop wind tunnel system 100. Different wind tunnel systems 100 generate different air paths. Different wind tunnel systems 100 generate different air paths for testing different sensors. Specifically, the airflow generated by a straight-path wind tunnel system 100 directly impacts the turntable 220, while the airflow generated by a loop wind tunnel system 100 flows around the turntable 220.

[0056] For example, in certain embodiments, when the wind tunnel system 100 is a straight-path wind tunnel system 100, the straight-path wind tunnel system 100 includes at least one fan and a linear guide channel. The airflow generated by the fan directly acts on the turntable 220 through the linear guide channel, forming a straight-path wind tunnel. When the wind tunnel system 100 is a loop wind tunnel system 100, the loop wind tunnel system 100 includes at least one fan and a guide device. The fan generates airflow and guides the airflow around the turntable 220 through the guide device, forming a loop wind tunnel.

[0057] For example, 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] For example, in some embodiments, the wind sensor may be a claw-type ultrasonic wind sensor.

[0059] In some embodiments, in order to improve the applicability of the device in actual use, a lifting mechanism may be provided. The lifting mechanism is connected to the fixed base plate 210 to achieve the height position of the wind direction sensor during the actual measurement process.

[0060] It should be noted that the lifting mechanism can use a servo cylinder, and the servo cylinder is connected to a controller. Therefore, the controller can be used to control the state of the servo cylinder and realize the detection position of the wind direction sensor.

[0061] In summary, the present invention discloses a wind direction standard device for a wind direction sensor. The multi-hole probe 310 automatically adjusts its height to accommodate different wind direction sensors, allowing for more accurate detection of wind speed and direction at the wind vane position. The wind direction standard probe (encoder) can be quickly disassembled and sent for inspection. At the same time, by raising and lowering the entire device, different wind direction sensors can be tested in the center of the wind tunnel. The device is horizontally arranged, and its built-in level indicator facilitates checking the levelness during installation, facilitating detection of the accuracy of the wind direction sensor.

[0062] At the same time, by using the porous probe 310 to detect the airflow deviation angle of the wind tunnel itself (the wind speed direction will deviate at different wind speeds, at different times, and in different environments), and the impact of the wind direction sensor on the wind speed direction after installation, the feedback controller is corrected to zero after the initial deviation angle is detected, 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.

[0063] Therefore, the utility model can effectively improve the problem of poor measurement accuracy of the current wind direction sensor during the detection process, and has high utilization value and use significance.

[0064] The above-described specific embodiments of the present invention do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A wind direction standard device for a wind direction sensor, characterized in that: include: A wind tunnel system (100) for generating a wind field required for testing; A main structure (200) is located on one side of the wind tunnel system (100), and a wind direction sensor to be tested is located on the main structure (200). The main structure (200) includes: Fixed bottom plate (210); A turntable (220) is rotatably connected to the fixed base plate (210), and a fixed tool (221) is provided on the turntable (220); a wind direction test fixture (230), detachably connected to the fixing fixture (221) and used for connecting to the wind direction sensor; a scale plate (240) fixedly connected to the fixed base plate (210) and coaxially arranged with the rotation center of the turntable (220); A corrector (300) for collecting pressure difference data of the wind field of the wind tunnel system (100); and a measuring standard (400) fixedly connected to the fixed base plate (210) and used to obtain the pressure difference data and the rotation angle of the turntable (220); Wherein, a driving member is connected to the turntable (220), and the driving member can be used to drive the turntable (220) to rotate.

2. The wind direction standard device of the wind direction sensor according to claim 1, characterized in that: The wind tunnel system (100) is a straight wind tunnel system (100) or a loop wind tunnel system (100).

3. The wind direction standard device of the wind direction sensor according to claim 2, characterized in that: The airflow generated by the straight wind tunnel system (100) directly acts on the turntable (220).

4. The wind direction standard device of the wind direction sensor according to claim 2, characterized in that: The airflow generated by the loop wind tunnel system (100) flows around the turntable (220).

5. The wind direction standard device of the wind direction sensor according to claim 1, characterized in that: It also includes a lifting mechanism connected to the fixed base plate (210), and the lifting mechanism is used to drive the main structure (200) to adjust its height in the vertical direction.

6. The wind direction standard device of the wind direction sensor according to claim 1, characterized in that: A limit sensor (222) is fixedly connected to the fixed base plate (210), and a limit block (223) is fixedly connected to the side of the turntable (220); The limit block (223) can allow the limit sensor (222) to be triggered.

7. The wind direction standard device of the wind direction sensor according to claim 1, characterized in that: The fixed tool (221) is rotatably connected to the turntable (220).

8. The wind direction standard device of the wind direction sensor according to claim 1, characterized in that: The corrector (300) is located on the side of the main structure (200) and includes: A multi-hole probe (310), a probe collector, and a pipeline (320) connected to the multi-hole probe (310) and the probe collector.

9. The wind direction standard device of the wind direction sensor according to claim 1, characterized in that: The scale plate (240) is located on the bottom surface of the experimental section of the wind tunnel system (100), and a "0 degree" mark of the scale plate (240) is aligned with the rotation axis of the wind direction sensor.

10. The wind direction standard device of the wind direction sensor according to claim 1, characterized in that: It also includes a controller which is electrically connected to the corrector (300) and the measurement standard (400).

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