Wind speed calibration device

Abstract

The utility model relates to a wind speed calibration device. The wind speed calibration device comprises an air pipe, a wind speed sensor and a controller, wherein a test cavity is formed in the air pipe; the fan is used for conveying air flow into the test cavity; the test assembly comprises a standard wind speed tester, a temperature sensor and a pressure sensor, the standard wind speed tester, the temperature sensor and the pressure sensor are arranged in the test cavity at intervals, the standard wind speed tester is used for testing the flow speed of the air flow, the temperature sensor is used for testing the internal temperature of the test cavity, and the pressure sensor is used for detecting the internal temperature of the test cavity. And the pressure sensor is used for testing the internal pressure of the test cavity. The wind speed calibration device provided by the utility model has abundant functions, can accurately measure the wind speed, temperature and pressure of the air flow in the air pipe, more comprehensively characterizes calibration conditions, and improves the reliability and stability of calibration results.

Description

TECHNICAL FIELD

[0001] The utility model relates to test equipment technical field, concretely relates to wind speed calibration device. BACKGROUND

[0002] The wind speed calibration device (or called wind tunnel) can simulate different wind speed conditions, calibrate and test the output of wind speed sensor, anemometer, wind direction meter, transmitter and other samples, determine the error range, and evaluate whether the performance meets the requirements. The wind speed calibration device is widely used in various fields that need to accurately measure wind speed, such as meteorological observation station, environmental monitoring station, power plant boiler system, industrial production, aerospace and many other fields.

[0003] The wind speed calibration device usually includes wind pipe, air source, wind speed sensor and controller and other components. Among them, the wind pipe can simulate various wind speed and wind direction; the air source can generate stable air flow; the wind speed sensor is used to measure the actual wind speed in the wind tunnel, so as to compare with the measurement result of the sample to be calibrated; the controller is used to control the operation of the air source, realize the automation of the whole calibration process, and record all the data in the calibration process. However, the existing wind speed calibration device has too single function, and cannot accurately measure the actual situation of air flow in the wind pipe, resulting in poor reliability and stability of the calibration result.

[0004] Therefore, there is a need in the art for a new technical solution to solve the above problems. UTILITY MODEL CONTENT

[0005] In order to solve or improve the technical problem of single function of the wind speed calibration device in the prior art to a certain extent, the utility model provides a wind speed calibration device. The wind speed calibration device comprises: a wind pipe, a test cavity is arranged in the wind pipe; a fan, the fan is used for conveying air flow into the test cavity; and a test assembly, the test assembly comprises a standard wind speed tester, a temperature sensor and a pressure sensor arranged in the test cavity at intervals, wherein the standard wind speed tester is used for testing the flow rate of the air flow, the temperature sensor is used for testing the internal temperature of the test cavity, and the pressure sensor is used for testing the internal pressure of the test cavity.

[0006] The skilled in the art can understand that the wind speed calibration device includes a wind pipe, a fan and a test assembly. The test cavity is arranged in the wind pipe, and appropriate samples to be calibrated such as wind speed sensors, anemometers, wind direction indicators and transmitters can be placed in the test cavity. The fan can deliver stable air flow into the test cavity. The test assembly includes a standard wind speed tester, a temperature sensor and a pressure sensor arranged in the test cavity at intervals. The standard wind speed tester is used to test the flow rate of the air flow in the test cavity, so as to compare the output results of the sample to be calibrated. The temperature sensor is used to test the internal temperature of the test cavity, and the pressure sensor is used to test the internal pressure of the test cavity (especially the absolute pressure of the test cavity), which further enriches the functions of the wind speed calibration device, accurately measures the actual situation of the air flow in the wind pipe, more comprehensively represents the calibration conditions, and further improves the reliability and stability of the calibration results.

[0007] In the preferred technical scheme of the wind speed calibration device, the wind speed calibration device further includes a controller configured to be in communication connection with the fan, the standard wind speed tester, the temperature sensor and the pressure sensor respectively. The controller can accurately control the operation of the fan, improve the automation of the entire calibration process, and conveniently obtain test data such as wind speed, temperature and pressure.

[0008] In the preferred technical scheme of the wind speed calibration device, a crystal oscillator timer is arranged on the controller. The crystal oscillator timer has many advantages such as good stability, high precision, low power consumption, wide working temperature range and easy integration, which can improve the control accuracy and control efficiency of the controller.

[0009] In the preferred technical scheme of the wind speed calibration device, the wind pipe includes a stable section, a contraction section, a test section and a diffusion section connected in sequence, and the test cavity is arranged in the test section. Through the above arrangement, the stability, uniformity and controllability of the air flow during the calibration process can be ensured, and the accuracy and reliability of the calibration results can be improved. At the same time, this design is also helpful to save energy, reduce energy consumption and reduce the interference to the environment.

[0010] In the preferred technical scheme of the wind speed calibration device, the standard wind speed tester includes a standard pitot tube. The standard pitot tube can accurately measure the differential pressure in the test cavity, and then combined with parameters such as air density and pitot tube coefficient in the test cavity, the actual wind speed of the air flow can be obtained conveniently and accurately. The standard pitot tube has many advantages such as wide measurement range, high precision, good compatibility, low cost, simple operation and good durability, which can ensure the test accuracy and service life of the wind speed calibration device.

[0011] In the preferred technical scheme of the wind speed calibration device, the standard pitot tube is detachably fixed on the test section by a clamping mechanism, so as to facilitate dismounting, mounting, maintenance and replacement.

[0012] In the preferred technical scheme of the wind speed calibration device, the fan is arranged on the side of the diffusion section away from the test section, or the fan is arranged on the side of the stabilization section away from the contraction section. Arranging the fan on the side of the diffusion section away from the test section can obtain a "suction type" fan arrangement, so as to obtain an air flow with uniform distribution of flow rate, which is beneficial to the accuracy of the test. In addition, arranging the fan on the side of the stabilization section away from the contraction section can obtain a "blowing type" fan arrangement, so as to reduce the influence of the air tightness of the air pipe on the calibration result.

[0013] In the preferred technical scheme of the wind speed calibration device, the honeycomb flow straightener and the damping net are arranged in the stabilization section and are spaced apart from each other. The honeycomb flow straightener can play a role of flow straightening, and improve the uniformity and stability of the air flow. The damping net can reduce the turbulence intensity and non-uniformity of the air flow, and further improve the uniformity and stability of the air flow.

[0014] In the preferred technical scheme of the wind speed calibration device, an observation window is arranged on the test section. The arrangement of the observation window can allow the test personnel to visually observe the actual situation of the test sample to be calibrated in the air flow, and provide valuable visual information for analysis of the calibration data and conclusion.

[0015] In the preferred technical scheme of the wind speed calibration device, the test assembly further comprises a temperature and humidity sensor arranged outside the air pipe and in communication connection with the controller, and used for testing the temperature and humidity of the external environment. The temperature and humidity sensor can further enrich the function of the test assembly, and more comprehensively represent the temperature and humidity of the external environment. BRIEF DESCRIPTION OF DRAWINGS

[0016] The preferred embodiments of the utility model will be described below in combination with the drawings, in which:

[0017] Figure 1 is the perspective structural schematic diagram of the embodiment of the wind speed calibration device of the utility model;

[0018] Figure 2 is the front view of the embodiment of the wind speed calibration device of the utility model;

[0019] Figure 3 is the internal structural schematic diagram of the embodiment of the wind speed calibration device of the utility model.

[0020] LIST OF REFERENCE NUMERALS

[0021] 100, wind speed calibration device; 110, base frame; 120, wind pipe; 121, stabilizing section; 1211, honeycomb straightener; 1212, damping net; 122, contraction section; 123, test section; 1231, test cavity; 1232, observation window; 124, diffusion section; 130, fan; 140, test assembly; 141, standard wind speed tester; 142, clamping mechanism; 143, temperature sensor; 144, pressure sensor; 145, temperature and humidity sensor. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present application will be described below with reference to the drawings. Those skilled in the art will understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0023] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "front", "back", "inner", "outer" and the like indicate the direction or positional relationship of the terms based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and is not intended to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In order to solve or improve the technical problem of single function of the wind speed calibration device in the prior art to some extent, the present application provides a wind speed calibration device 100. The wind speed calibration device 100 comprises: a wind pipe 120, a test cavity 1231 is arranged in the wind pipe 120; a fan 130, the fan 130 is used for conveying air flow into the test cavity 1231; and a test assembly 140, the test assembly 140 comprises a standard wind speed tester 141, a temperature sensor 143 and a pressure sensor 144 arranged in the test cavity 1231 and spaced from each other, wherein the standard wind speed tester 141 is used for testing the flow rate of the air flow, the temperature sensor 143 is used for testing the internal temperature of the test cavity 1231, and the pressure sensor 144 is used for testing the internal pressure of the test cavity 1231.

[0026] Figure 1 is a three-dimensional structure schematic diagram of an embodiment of the wind speed calibration device of the present application;Figure 2 is a front view of an embodiment of the wind speed calibration device of the present application; Figure 3 is a schematic view of the internal structure of an embodiment of the wind speed calibration device of the present application. As shown in Figures 1-3 , in one or more embodiments, the wind speed calibration device 100 of the present application comprises a wind pipe 120, a fan 130, and a test assembly 140, etc. Among them, the wind pipe 120 allows the air flow to flow therein; the fan 130 is used to generate the air flow delivered into the wind pipe 120; the test assembly 140 is used to test the wind speed, temperature, and pressure, etc. parameters in the wind pipe 120. Alternatively, the wind speed calibration device 100 of the present application also comprises, but is not limited to, display operation units, communication interfaces, emergency stop buttons, overload protections, overheat protections, etc. components (not shown in the figure) to further enrich the functionality and safety of the wind speed calibration device 100.

[0027] As shown in Figures 1-3 , in one or more embodiments, the wind pipe 120 comprises a stable section 121, a contraction section 122, a test section 123, and a diffusion section 124 connected in sequence. The stable section 121, the contraction section 122, the test section 123, and the diffusion section 124 can be processed by suitable materials, such as stainless steel, etc., so as to have good mechanical properties. In addition, the connection mode between the stable section 121, the contraction section 122, the test section 123, and the diffusion section 124 can be, but is not limited to, welding, screwing, etc., as long as it can ensure that the wind pipe 120 has good stability and air tightness.

[0028] Continuing to refer to Figure 3 , the vertical cross section of the stable section 121 is configured to be substantially the same along the flow direction of the air flow (based on the orientation shown in Figure 3 , i.e. from left to right direction). The stable section 121 can stabilize the turbulent and uneven air flow with sufficient time and space, attenuate the vortex in the air flow, and provide uniformity of the direction and speed of the air flow. In one or more embodiments, the stable section 121 is provided with a honeycomb flow straightener 1211 and a damping net 1212 spaced apart from each other. Among them, the honeycomb flow straightener 1211 has a unique honeycomb structure design. When the air flow passes through these honeycomb structures, the small passages of the honeycomb can make the air flow more uniform and stable, play a role of flow straightening, and improve the stability and uniformity of the air flow. The damping net 1212 has a suitable mesh and number of layers. When the air flow passes through the damping net 1212, the damping net 1212 can significantly reduce the turbulence intensity and unevenness of the air flow, further improve the stability and uniformity of the air flow, optimize the distribution of the air flow, and ensure the consistency and repeatability of the calibration conditions.

[0029] Continuing to refer to Figure 3, the vertical cross section of the contraction section 122 is configured to gradually decrease along the flow direction of the air flow. Such gradually narrowing pipe design not only accelerates the air flow to the required rate according to the continuity principle, but also further eliminates the turbulence and vortex in the air flow, ensures the smooth flow of the air flow, and appropriately improves the energy ratio, saving energy.

[0030] Continuing to refer to Figure 3 , the vertical cross section of the test section 123 is configured to be substantially the same along the flow direction of the air flow. The test section 123 is formed with a test cavity 1231 inside. The test cavity 1231 can provide a stable and uniform air flow environment, simulate various atmospheric boundary layer conditions, and calibrate various types of test samples (such as wind speed sensors, anemometers, wind direction indicators, transmitters, etc.) placed in the test cavity 1231. In one or more embodiments, an observation window 1232 is provided on the test sample section. The observation window 1232 can be made of a suitable transparent material (such as glass, etc.), so that the test personnel can directly observe the actual situation of the test sample in the air flow through the observation window 1232, providing valuable visual information for the analysis of calibration data and the conclusion.

[0031] Continuing to refer to Figure 3 , the vertical cross section of the diffusion section 124 is configured to gradually increase along the flow direction of the air flow. Such gradually expanding pipe design can reduce the flow rate of the air flow, so that the air flow is discharged into the external environment at a smaller flow rate, reducing the energy loss of the air flow and reducing the disturbance to the environment.

[0032] As shown in Figure 1 and Figure 2 , in one or more embodiments, the utility model wind speed calibration device 100 further comprises a base frame 110. The base frame 110 is connected with the wind pipe 120 to stably support the wind pipe 120. The base frame 110 can be made of a suitable metal material (such as stainless steel, etc.), so that it has good mechanical properties. The fixing mode between the base frame 110 and the wind pipe 120 is not limited, such as welding, screwing, etc. In one or more embodiments, the base frame 110 is arranged at the stable section 121 and the diffusion section 124 of the wind pipe 120 respectively. In other words, the base frame 110 is arranged at the left and right ends (based on the orientation shown in Figure 2 ) of the wind pipe 120 respectively, so as to improve the stability of the base frame 110 supporting the wind pipe 120.

[0033] As shown in Figure 3 , in one or more embodiments, the fan 130 is arranged on the side of the diffusion section 124 of the wind pipe 120 away from the test section 123. In other words, based on the orientation shown in Figure 3In the shown position, the fan 130 is arranged at the right side of the diffusion section 124. Therefore, when the fan 130 rotates, the air flow will pass through the stabilization section 121, the contraction section 122, the test section 123 and the diffusion section 124 in sequence, forming a "suction type" fan 130 arrangement, so as to obtain an air flow with uniform distribution of flow rate, which is conducive to the accuracy of the test. Alternatively, the fan 130 is arranged at the side of the stabilization section 121 of the air duct 120 away from the contraction section 122. In other words, based on the position of the fan 130, the air flow will pass through the test section 123 and the diffusion section 124 in sequence, forming a "blow type" fan 130 arrangement, so as to reduce the influence of the air tightness of the air duct 120 on the calibration result. It should be noted that the type of the fan 130 is not limited, such as an axial fan 130, etc. Figure 3 In the shown position, the fan 130 is arranged at the right side of the diffusion section 124. Therefore, when the fan 130 rotates, the air flow will pass through the stabilization section 121, the contraction section 122, the test section 123 and the diffusion section 124 in sequence, forming a "suction type" fan 130 arrangement, so as to obtain an air flow with uniform distribution of flow rate, which is conducive to the accuracy of the test. Alternatively, the fan 130 is arranged at the side of the stabilization section 121 of the air duct 120 away from the contraction section 122. In other words, based on the position of the fan 130, the air flow will pass through the test section 123 and the diffusion section 124 in sequence, forming a "blow type" fan 130 arrangement, so as to reduce the influence of the air tightness of the air duct 120 on the calibration result. It should be noted that the type of the fan 130 is not limited, such as an axial fan 130, etc.

[0034] As shown in Figure 3 In one or more embodiments, the test assembly 140 includes a standard air speed tester 141, a temperature sensor 143 and a pressure sensor 144 arranged in the test cavity 1231 at intervals from each other. Among them, the standard air speed tester 141 is used to test the flow rate of the air flow, the temperature sensor 143 is used to test the internal temperature of the test cavity 1231, and the pressure sensor 144 is used to test the internal pressure of the test cavity 1231. In one or more embodiments, the standard air speed tester 141 includes a standard pitot tube. The standard pitot tube can accurately measure the differential pressure in the test cavity, and then combined with the air density, pitot tube coefficient and other parameters in the test cavity, the actual air speed of the air flow can be obtained conveniently and accurately. The standard pitot tube has many advantages such as wide measurement range, high precision, good compatibility, low cost, simple operation and good durability, which can ensure the test precision and service life of the air speed calibration device 100. In one or more embodiments, the standard pitot tube is clamped by a clamping mechanism 142 (see Figure 1 and Figure 2) can be detachably fixed on the test section 123, so as to facilitate disassembly, installation, maintenance and replacement. Alternatively, the standard wind speed tester 141 can also be provided as a standard ultrasonic flowmeter or other suitable standard wind speed tester 141. The type of the temperature sensor 143 can be but not limited to a thermocouple sensor, a thermal resistance sensor, a thermistor sensor, etc. The arrangement position of the temperature sensor 143 can be adjusted according to actual needs, for example, arranged at the connection between the test section 123 and the contraction section 122. The type of the pressure sensor 144 can be but not limited to a piezoresistive sensor, a piezoelectric sensor, a capacitive sensor, etc. The arrangement position of the pressure sensor 144 can be adjusted according to actual needs, for example, arranged at the connection between the test section 123 and the diffusion section 124. In addition, the absolute pressure of the test cavity 1231 obtained by the pressure sensor 144 can also be further calculated to obtain the air density in the test cavity 1231, so as to further enrich the functionality of the wind speed calibration device 100.

[0035] As shown in Figure 3 one or more embodiments, the test assembly 140 further comprises a temperature and humidity sensor 145. The temperature and humidity sensor 145 is arranged outside the air pipe 120, for testing the temperature and humidity of the external environment. The type of the temperature and humidity sensor 145 can be but not limited to a resistance sensor, a capacitive sensor, etc. The arrangement position of the temperature and humidity sensor 145 can be adjusted according to actual needs, for example, arranged outside the test section 123.

[0036] In one or more embodiments, the utility model wind speed calibration device 100 further comprises a controller (not shown in the figure). The controller is in communication connection with the fan 130, the standard wind speed tester 141, the temperature sensor 143 and the pressure sensor 144 respectively. The controller can accurately control the operation of the fan 130, improve the automation of the entire calibration process, and conveniently acquire, process and analyze the test data such as wind speed, temperature, pressure, etc. In one or more embodiments, a crystal oscillator timer (not shown in the figure) is arranged on the controller. The crystal oscillator timer has many advantages such as good stability, high precision, low power consumption, wide working temperature range, easy integration, etc., which can improve the control precision and control efficiency of the controller. In one or more embodiments, the controller is also in communication connection with the temperature and humidity sensor 145, so as to automatically acquire the temperature and humidity of the external environment measured by the temperature and humidity sensor 145. It should be pointed out that the connection mode between the controller and the fan 130, the standard wind speed tester 141, the temperature sensor 143, the pressure sensor 144 and the temperature and humidity sensor 145 can be wired connection or wireless connection.

[0037] The technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but the person skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. The person skilled in the art can make equivalent changes or replacements to the related technical features without deviating from the principles of the utility model, and the technical schemes after the changes or replacements will all fall within the protection scope of the utility model.

Claims

1. A wind speed calibration device (100), characterized in that, The wind speed calibration device (100) comprises: a wind pipe (120) in which a test cavity (1231) is arranged; a fan (130) for conveying an air flow into the test cavity (1231); and a test assembly (140) comprising a standard wind speed tester (141), a temperature sensor (143) and a pressure sensor (144) arranged in the test cavity (1231) at intervals, wherein the standard wind speed tester (141) is used to test the flow rate of the air flow, the temperature sensor (143) is used to test the internal temperature of the test cavity (1231), and the pressure sensor (144) is used to test the internal pressure of the test cavity (1231).

2. The wind speed calibration device (100) according to claim 1, characterized in that The wind speed calibration device (100) further comprises: a controller configured to be in communication connection with the fan (130), the standard wind speed tester (141), the temperature sensor (143) and the pressure sensor (144), respectively.

3. The wind speed calibration device (100) according to claim 2, characterized in that A crystal oscillator timer is arranged on the controller.

4. The wind speed calibration device (100) according to any one of claims 1-3, characterized in that, The wind pipe (120) comprises a stable section (121), a contraction section (122), a test section (123) and a diffusion section (124) connected in sequence, wherein the test cavity (1231) is arranged in the test section (123).

5. The wind speed calibration device (100) according to claim 4, characterized in that The standard wind speed tester (141) comprises a standard pitot tube.

6. The wind speed calibration device (100) according to claim 5, characterized in that The standard pitot tube is detachably fixed on the test section (123) through a clamping mechanism (142).

7. The wind speed calibration device (100) according to claim 4, characterized in that The fan (130) is arranged on the side of the diffusion section (124) away from the test section (123); or the fan (130) is arranged on the side of the stable section (121) away from the contraction section (122).

8. The wind speed calibration device (100) according to claim 4, characterized in that A honeycomb flow straightener (1211) and a damping net (1212) are arranged in the stable section (121) at intervals.

9. The wind speed calibration device (100) according to claim 4, characterized in that An observation window (1232) is arranged on the test section (123).

10. The wind speed calibration device (100) according to claim 2, characterized in that The test assembly (140) further comprises: a temperature and humidity sensor (145) arranged outside the wind pipe (120) and in communication connection with the controller, for testing the temperature and humidity of the external environment.

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