Wind field structure and sensing device for wind turbine generator

Abstract

The utility model provides a wind field structure and a sensing device used for a wind turbine generator, and the wind field structure comprises an arc-shaped air duct, one end of the air duct is provided with an air inlet, and the other end of the air duct is provided with an air outlet; the air pipe is arranged on the inner side of the air duct, the air outlet end of the air pipe is connected with the air inlet, and the air inlet end of the air pipe extends in the direction away from the air outlet; the controllable air source is used for forming an air field in the air duct in the direction from the air inlet to the air outlet. According to the wind field structure and the sensing device for the wind turbine generator, through cooperation of the arc-shaped air channel and the air pipe, the problems of air disturbance, vortexes and the like in the air channel are effectively reduced, and then it is guaranteed that the wind field has high uniformity; in addition, the air duct is arranged in an arc shape, so that the wind field has a long acting distance, and meanwhile, the occupied area is greatly reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wind farms, and in particular to a wind farm structure and a sensor device for a wind turbine. Background Art

[0002] With the continuous improvement of industrial level, more and more sensor devices are involved in automated operation. For some sensor devices that need to set up wind fields, the uniformity of the wind field is one of the key factors affecting the accuracy of the sensor device. At the same time, if the wind field occupies a large area, it will also limit the application of the sensor device. Therefore, how to ensure that the wind field has high uniformity and a small occupied area is a problem that needs to be solved. Summary of the invention

[0003] The present disclosure aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, an object of the present disclosure is to provide a wind farm structure and a sensor device for a wind turbine.

[0005] To achieve the above-mentioned purpose, the first aspect of the present disclosure provides a wind field structure, including: an air duct, which is arranged in an arc shape, and an air inlet is arranged at one end of the air duct, and an air outlet is arranged at the other end of the air duct; an air duct, which is arranged on the inner side of the air duct, and the air outlet end of the air duct is connected to the air inlet, and the air inlet end of the air duct extends in a direction away from the air outlet; and a controllable wind source, which is used to form a wind field in the air duct along the direction from the air inlet to the air outlet.

[0006] Optionally, the air duct includes: a plurality of mesh holes, and the plurality of mesh holes are arranged at the air inlet end of the air duct.

[0007] Optionally, the air duct further includes: a filter screen, the filter screen is mounted on the air inlet end of the air duct, and the filter screen covers a plurality of the mesh holes, and the air permeability of the filter screen is greater than a set threshold.

[0008] Optionally, the air outlet is arranged along the length direction of the air duct.

[0009] Optionally, the wind farm structure further includes: a wind speed sensor, a detection end of the wind speed sensor is arranged in the wind duct, and an output end of the wind speed sensor is connected to an input end of the controllable wind source.

[0010] Optionally, the controllable wind source includes: a fan blade, which is rotatably arranged in the air duct and is close to the air inlet; a drive motor, which is transmission-connected to the fan blade, and is used to drive the fan blade to rotate so that the wind field is formed in the air duct along the direction from the air inlet to the air outlet.

[0011] A second aspect of the present disclosure provides a sensing device for a wind turbine generator set, comprising: a wind farm structure; a temperature and humidity sensor, the temperature and humidity sensor comprising: a dry-bulb thermometer and a wet-bulb thermometer, the dry-bulb thermometer and the wet-bulb thermometer are respectively arranged in the wind duct of the wind farm structure.

[0012] Optionally, the arc shape of the air duct is an arc of three-quarters of a circle, and the dry-bulb thermometer and the wet-bulb thermometer are respectively arranged between one-third of the air duct and two-thirds of the air duct.

[0013] Optionally, the dry-bulb thermometer and / or the wet-bulb thermometer is a platinum resistance thermometer.

[0014] The technical solution provided by the present disclosure may have the following beneficial effects:

[0015] When the controllable wind source forms a wind field along the direction from the air inlet to the air outlet in the air duct, the curved air duct can play a role in smooth guidance. At the same time, since the air outlet end of the air duct is connected to the air inlet and the air inlet end of the air duct extends in the direction away from the air outlet, the air entering the air inlet can be away from the air outlet of the air outlet, thereby effectively reducing the influence of the air outlet on the air entering the air inlet. Therefore, through the cooperation of the curved air duct and the air duct, the air disturbance, vortex and other problems in the air duct are effectively reduced, thereby ensuring that the wind field has a high uniformity; moreover, since the air duct is arranged in an arc shape, the wind field has a longer effective distance while the occupied area is greatly reduced, thereby effectively reducing the volume of the wind field structure, so that the sensor device can be applied to more fields.

[0016] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present disclosure will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0018] Figure 1 is a three-dimensional schematic diagram of a sensor device for a wind turbine generator set proposed in an embodiment of the present disclosure;

[0019] Figure 2 is a top cross-sectional schematic diagram of a sensor device for a wind turbine generator set proposed in one embodiment of the present disclosure;

[0020] Figure 3 is a three-dimensional schematic diagram of a controllable wind source in a sensor device for a wind turbine generator set proposed in one embodiment of the present disclosure;

[0021] As shown in the figure: 1. Wind farm structure;

[0022] 11. air duct, 111. air inlet, 112. air outlet;

[0023] 12. air duct, 121. mesh, 122. filter;

[0024] 13. controllable wind source, 131. fan blade, 132. driving motor;

[0025] 14. Wind speed sensor;

[0026] 2. Temperature and humidity sensor;

[0027] 21. Dry-bulb thermometer, 22. Wet-bulb thermometer. DETAILED DESCRIPTION

[0028] Embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and are not to be construed as limitations of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications, and equivalents that fall within the spirit and connotation of the appended claims.

[0029] like Figure 1 and Figure 2 As shown, the embodiment of the present disclosure proposes a wind field structure 1, including an air duct 11, an air pipe 12 and a controllable wind source 13. The air duct 11 is arranged in an arc shape, and an air inlet 111 is arranged at one end of the air duct 11, and an air outlet 112 is arranged at the other end of the air duct 11. The air duct 12 is arranged on the inner side of the air duct 11, and the air outlet end of the air duct 12 is connected to the air inlet 111, and the air inlet end of the air duct 12 extends in a direction away from the air outlet 112. The controllable wind source 13 is used to form a wind field in the air duct 11 along the direction from the air inlet 111 to the air outlet 112.

[0030] It can be understood that when the controllable wind source 13 forms a wind field along the direction from the air inlet 111 to the air outlet 112 in the air duct 11, the curved air duct 11 can play a smooth guiding role. At the same time, since the air outlet end of the air duct 12 is connected to the air inlet 111, and the air inlet end of the air duct 12 extends in a direction away from the air outlet 112, the air entering the air inlet 111 can be away from the air outlet 112, thereby effectively reducing the influence of the air outlet 112 on the air entering the air inlet 111. Therefore, through the cooperation of the curved air duct 11 and the air duct 12, the air disturbance, vortex and other problems in the air duct 11 are effectively reduced, thereby ensuring that the wind field has a high uniformity; moreover, since the air duct 11 is arranged in an arc shape, the wind field has a longer effective distance while the occupied area is greatly reduced, thereby effectively reducing the volume of the wind field structure 1, so that the sensor device can be applied to more fields.

[0031] It should be noted that the air duct 11 is used to cooperate with the controllable wind source 13 to form a wind field with higher uniformity. The specific type of the air duct 11 can be set according to actual needs and is not limited to this. For example, the air duct 11 can be a tube structure. The air duct 11 is arranged in a ring shape, and a gap is provided in the length direction of the air duct 11. The gap makes the air duct 11 form a first free end and a second free end relatively set. The air inlet 111 is set on the first free end, and the air outlet 112 is set on the second free end. Among them, except for the positions where the air inlet 111 and the air outlet 112 are set, the other positions of the first free end and the second free end are closed structures to reduce interference from the external environment and ensure stable air inlet and outlet of the air duct 11.

[0032] The air inlet 111 is used for the air intake of the air duct 11. The specific type of the air inlet 111 can be set according to actual needs and is not limited to this. For example, the air inlet 111 can be set along the length direction of the air duct 11 or along the width direction of the air duct 11. The size setting of the air inlet 111 should be able to meet the stable air intake of the air duct 11.

[0033] The air outlet 112 is used for exhausting the air duct 11. The specific type of the air outlet 112 can be set according to actual needs and is not limited to this. For example, the air outlet 112 can be set along the length direction of the air duct 11 or along the width direction of the air duct 11. The size setting of the air outlet 112 should be able to meet the stable exhaust requirements of the air duct 11.

[0034] The air duct 12 is used for the air intake of the air inlet 111. The specific type of the air duct 12 can be set according to actual needs, and there is no limitation on this. For example, the air duct 12 can be a pipe structure, and the air duct 12 can be close to an "L" shape, a "U" shape, etc., so that the air intake end of the air duct 12 can extend in a direction away from the air outlet 112, thereby reducing the impact of the air outlet 112 on the air intake of the air duct 12. The air duct 12 has two ports, one as an air intake end and the other as an air outlet end. The air intake end is used for the air intake of the air duct 12, and the air outlet end is used for the air outlet of the air duct 12.

[0035] The size of the air duct 12 can be set according to actual needs, and there is no limitation on this. For example, the diameter of the air duct 12 can be larger than the diameter of the air inlet 111.

[0036] The air inlet structure of the air duct 12 can be set according to actual needs, and there is no limitation to this. For example, the air inlet of the air duct 12 can be one or more opening structures set on the end face and / or circumferential surface of the air duct 12, and a filtering air inlet structure covering the opening structure can also be set on the air inlet of the air duct 12. The circumferential surface of the air duct 12 refers to the surface where the air duct 12 is located in the circumferential direction, which constitutes the tubular structure of the air duct 12, and the end face of the air duct 12 refers to the surface perpendicular to the axial direction of the air duct 12, and the end face of the air duct 12 is used to block the open port formed by the tubular structure.

[0037] The controllable wind source 13 is used to form a uniform wind field with controllable wind speed. The specific type of the controllable wind source 13 can be set according to actual needs and is not limited to this.

[0038] The wind speed value of the wind farm can be set according to actual needs, and there is no limitation on this. For example, the wind speed range of the wind farm can be 2.5m / s-3.5m / s. Preferably, the wind speed of the wind farm can be 3m / s.

[0039] like Figure 2 As shown, in some embodiments, the air duct 12 includes a plurality of meshes 121 , and the plurality of meshes 121 are disposed at the air inlet end of the air duct 12 .

[0040] It can be understood that since the multiple mesh holes 121 are arranged at the air inlet end of the air duct 12, the external air can enter the air duct 12 through the multiple mesh holes 121, and enter the air duct 11 from the air duct 12, thereby ensuring the stable formation of the wind field in the air duct 11. At the same time, through the setting of the multiple mesh holes 121, while realizing the air intake of the air duct 11, it is also possible to prevent larger particles from entering the wind field, further ensuring the stable formation of the wind field in the air duct 11.

[0041] It should be noted that the mesh 121 is used for external air to enter the air duct 12. The specific type of the mesh 121 can be set according to actual needs and is not limited to this. For example, the mesh 121 can be a circular hole, a rectangular hole, a diamond hole, etc. The mesh 121 can be distributed on the circumferential surface of the air inlet end of the air duct 12, and can also be distributed on the end face of the air inlet end of the air duct 12.

[0042] like Figure 1 As shown, in some embodiments, the air duct 12 further includes a filter 122, which is sleeved on the air inlet end of the air duct 12, and the filter 122 covers a plurality of meshes 121, and the air permeability of the filter 122 is greater than a set threshold.

[0043] It can be understood that since the air permeability of the filter 122 is greater than the set threshold, more external air can pass through the filter 122 into the air duct 12. At the same time, since the filter 122 is mounted on the air inlet end of the air duct 12 and the filter 122 covers a plurality of mesh holes 121, when external air enters the air duct 12, debris with smaller particle sizes cannot pass through the mesh holes 121 and are blocked outside the air duct 11, thereby further ensuring the stable formation of the wind field in the air duct 11.

[0044] It should be noted that the filter 122 is used to block smaller particles in the air. The specific type of the filter 122 can be set according to actual needs and is not limited to this.

[0045] The threshold value may be set according to actual needs, and there is no limitation on this. For example, the threshold value may be 60%, 70%, etc.

[0046] like Figure 1 and Figure 2 As shown, in some embodiments, the air outlet 112 is arranged along the length direction of the air duct 11 .

[0047] It is understandable that by arranging the air outlet 112 along the length direction of the air duct 11, the vortex and other problems at the air outlet 112 of the air duct 11 can be effectively reduced, thereby ensuring the stable formation of the wind field in the air duct 11 and ensuring that the wind field has a high uniformity.

[0048] It should be noted that the air outlet 112 may be an opening that runs through the air duct 11 along the length direction.

[0049] like Figure 1 and Figure 2 As shown, in some embodiments, the wind farm structure 1 further includes a wind speed sensor 14 , a detection end of the wind speed sensor 14 is arranged in the wind duct 11 , and an output end of the wind speed sensor 14 is connected to an input end of the controllable wind source 13 .

[0050] It can be understood that, by setting the wind speed sensor 14, the controllable wind source 13 can control the wind field according to the wind speed detected by the wind speed sensor 14, so that the wind speed of the wind field is stabilized within the required range, thereby meeting different detection requirements.

[0051] It should be noted that the wind speed sensor 14 is used to detect the wind speed of the wind field in the wind duct 11. The specific type of the wind speed sensor 14 can be set according to actual needs and is not limited to this.

[0052] like Figure 3As shown, in some embodiments, the controllable wind source 13 includes a fan blade 131 and a drive motor 132. The fan blade 131 is rotatably arranged in the air duct 11, and the fan blade 131 is close to the air inlet 111. The drive motor 132 is transmission-connected to the fan blade 131. The drive motor 132 is used to drive the fan blade 131 to rotate, so that a wind field is formed in the air duct 11 along the direction from the air inlet 111 to the air outlet 112.

[0053] It is understandable that the drive motor 132 drives the fan blades 131 to rotate, so that the fan blades 131 are used to form wind in the air duct 11 along the direction from the air inlet 111 to the air outlet 112, thereby ensuring the stable formation of a uniform wind field in the air duct 11.

[0054] It should be noted that the drive motor 132 is used to drive the fan blades 131 to rotate. The specific type of the drive motor 132 can be set according to actual needs and is not limited to this. For example, the drive motor 132 can be a brushless motor, a small motor, etc. The drive motor 132 can be set in the air duct 11 using a bracket.

[0055] The fan blade 131 is used to form a wind field in the air duct 11 by rotating. The specific type of the fan blade 131 can be set according to actual needs, and there is no limitation on this. For example, the fan blade 131 includes a ring seat and a plurality of blades. The ring seat is sleeved on the shaft of the drive motor 132, and the plurality of blades are arranged along the circumference of the ring seat. The central axis of the fan blade 131 coincides with the central axis of the shaft of the drive motor 132, and the axial direction of the fan blade 131 is located in the length direction of the air duct 11.

[0056] like Figure 1 and Figure 2 As shown, the embodiment of the present disclosure also proposes a sensing device for a wind turbine, including a wind farm structure 1 and a temperature and humidity sensor 2 as in the embodiment of the present disclosure, the temperature and humidity sensor 2 includes a dry-bulb thermometer 21 and a wet-bulb thermometer 22, and the dry-bulb thermometer 21 and the wet-bulb thermometer 22 are respectively arranged in the air duct 11 of the wind farm structure 1.

[0057] It can be understood that since the dry-bulb thermometer 21 and the wet-bulb thermometer 22 are respectively arranged in the air duct 11, and the wind field in the air duct 11 is formed by the controllable wind source 13, the dry-bulb thermometer 21 and the wet-bulb thermometer 22 can be under the same wind speed condition, so that the temperature and humidity sensor 2 can detect the first temperature using the dry-bulb thermometer 21 and the second temperature using the wet-bulb thermometer 22, and calculate the relative humidity of the air according to the first temperature, the second temperature and the wind speed of the wind field, thereby meeting the detection requirements of the relative humidity.

[0058] Among them, since the dry-bulb thermometer 21 and the wet-bulb thermometer 22 are respectively arranged in the wind field formed by the controllable wind source 13, the wind speed of the wind field where the dry-bulb thermometer 21 and the wet-bulb thermometer 22 are located is fixed, so that it is convenient for the temperature and humidity sensor 2 to determine the precise dry-bulb and wet-bulb coefficient A according to the fixed wind speed, and then accurately calculate the relative humidity of the air according to the precise dry-bulb and wet-bulb coefficient A, thereby effectively improving the measurement accuracy of the temperature and humidity sensor 2 and meeting the demand for accurate measurement of relative humidity.

[0059] At the same time, when the controllable wind source 13 forms a wind field along the direction from the air inlet 111 to the air outlet 112 in the air duct 11, the arc-shaped air duct 11 can play a smooth guiding role. At the same time, since the air outlet end of the air duct 12 is connected to the air inlet 111, and the air inlet end of the air duct 12 extends in a direction away from the air outlet 112, the air entering the air inlet 111 can be away from the air outlet 112, thereby effectively reducing the influence of the air outlet 112 on the air entering the air inlet 111. Therefore, through the cooperation of the arc-shaped air duct 11 and the air duct 12, the air disturbance, vortex and other problems in the air duct 11 are effectively reduced, thereby ensuring that the wind field has a high uniformity; moreover, since the air duct 11 is arranged in an arc shape, the wind field has a longer effective distance while the occupied area is greatly reduced, thereby effectively reducing the volume of the wind field structure 1, so that the sensor device can be applied to more fields.

[0060] It should be noted that the temperature and humidity sensor 2 can obtain the relative humidity of the air according to the first formula, wherein the first formula is:

[0061] U=(e w -A×p×(t s -t w )) / e s ×100%;

[0062] U is the relative humidity of the air; w is the saturated water vapor pressure at the second temperature, in hPa; e s is the saturated water vapor pressure at the first temperature, in hPa; A is the influence coefficient of the dry-bulb thermometer 21 and the wet-bulb thermometer 22, i.e., the dry-bulb and wet-bulb coefficients; p is the air pressure (barometric pressure), generally 1013.25 hPa; t s is the first temperature in degrees Celsius; t w is the second temperature in degrees Celsius.

[0063] Among them, the dry-bulb coefficient A can be obtained according to the second formula, and the second formula is:

[0064] A=0.0001×(65+6.75 / v);

[0065] v is the wind speed in the wind field, in m / s.

[0066] The saturated water vapor pressure at different temperatures can be obtained according to the third formula, which is:

[0067] InE=53.67957-6743.769 / T-4.8451InT;

[0068] E is the saturated water vapor pressure, in hPa.

[0069] T can be obtained according to the fourth formula, which is:

[0070] T=273.15+t;

[0071] t is the temperature corresponding to E, the unit of t is Celsius, and the unit of T is absolute temperature scale.

[0072] Among them, the value of the dry-bulb coefficient A is determined by the type of the dry-bulb thermometer 21 and the wet-bulb thermometer 22 and the wind speed at the dry-bulb thermometer 21 and the wet-bulb thermometer 22. Under different wind speed conditions, it is necessary to fit the dry-bulb coefficient A corresponding to the wind speed condition, and there is a certain error in the fitting process, which leads to low measurement accuracy of the temperature and humidity sensor 2. However, in this embodiment, since the wind speed of the wind field is determined, the dry-bulb coefficient A of the temperature and humidity sensor 2 can also be accurately determined, for example:

[0073] After the sensor device is processed, it is placed in a certain detection environment, that is, the relative humidity of the air in the detection environment is fixed. The known relative humidity of the air can be used to infer the accurate dry-bulb coefficient A, thereby eliminating the fitting error of the dry-bulb coefficient A and improving the measurement accuracy of the temperature and humidity sensor 2.

[0074] Specifically, according to "JJG (Meteorology) 003-2011 Automatic Weather Station Humidity Sensor Calibration Procedure", the calibration points are 30%RH, 40%RH, 55%RH, 75%RH, 95%RH, a total of 5 points, the maximum allowable error of the humidity sensor is +4%RH (≤80%RH) and +8%RH (>80%RH), 4 humidity sensors of different models are selected for experiments, and accurate humidity calibration devices such as humidity and temperature control boxes are used. At a fixed wind speed, a dry-bulb thermometer 21 is used to detect the first temperature, and a wet-bulb thermometer 22 is used to detect the second temperature. The dry-bulb coefficient A is inverted according to the first formula, and the accurate dry-bulb coefficient A of the temperature and humidity sensor 2 is obtained by using the average value and standard deviation of the 4 dry-bulb coefficients A.

[0075] The saturated water vapor pressure will change with the change of temperature. In this embodiment, the detection environment temperature range of the sensor device can be 0°C-100°C.

[0076] The controllable wind source 13 is used to form a uniform wind field with controllable wind speed. The specific type of the controllable wind source 13 can be set according to actual needs and is not limited to this.

[0077] The dry-bulb thermometer 21 is a dry temperature probe, which is used to detect the first temperature in the air. The specific type of the dry-bulb thermometer 21 can be set according to actual needs and is not limited to this.

[0078] The wet-bulb thermometer 22 is a moist temperature probe, and is used to detect the second temperature in the air. The specific type of the wet-bulb thermometer 22 can be set according to actual needs, and there is no limitation on this.

[0079] The dry-bulb thermometer 21 and the wet-bulb thermometer 22 may be disposed on the side wall of the air duct 11 by a detachable structure such as bolt fixing or thread fixing.

[0080] like Figure 1 and Figure 2 As shown, in some embodiments, the arc shape of the air duct 11 is a three-quarter circle arc, and the dry-bulb thermometer 21 and the wet-bulb thermometer 22 are respectively arranged between one-third of the air duct 11 and two-thirds of the air duct 11.

[0081] It can be understood that since the arc shape of the air duct 11 is an arc of three-quarters of a circle, and the air inlet 111 and the air outlet 112 are respectively arranged at the two ends of the air duct 11, air disturbances are prone to occur at the air inlet 111 and the air outlet 112 of the air duct 11, thereby causing an uneven wind field. Therefore, the dry-bulb thermometer 21 and the wet-bulb thermometer 22 are respectively arranged between one-third of the air duct 11 and two-thirds of the air duct 11, which can ensure that the dry-bulb thermometer 21 and the wet-bulb thermometer 22 are stably in a uniform wind field, thereby ensuring that the temperature and humidity sensor 2 accurately detects the relative humidity of the air.

[0082] It should be noted that air disturbance is easy to occur at the air inlet 111 and the air outlet 112 of the air duct 11 , while the wind field between one-third of the air duct 11 and two-thirds of the air duct 11 is extremely uniform.

[0083] In some embodiments, the dry-bulb thermometer 21 and / or the wet-bulb thermometer 22 is a platinum resistance thermometer.

[0084] It is understandable that the platinum resistance thermometer has higher detection accuracy, so that the dry-bulb thermometer 21 can accurately detect the first temperature, and / or the wet-bulb thermometer 22 can accurately detect the second temperature, thereby effectively improving the measurement accuracy of the temperature and humidity sensor 2 and meeting the demand for accurate measurement of relative humidity.

[0085] It should be noted that only the dry-bulb thermometer 21 may be a platinum resistance thermometer, only the wet-bulb thermometer 22 may be a platinum resistance thermometer, or both the dry-bulb thermometer 21 and the wet-bulb thermometer 22 may be platinum resistance thermometers, and there is no limitation to this.

[0086] The sensing device of the present embodiment can be used to detect the operating environment of the fan in the wind turbine set, the relative humidity inside the machinery, the relative humidity of the operating environment of the equipment in various prefabricated cabins of the booster station, etc. Since the sensing device of the present embodiment has high measurement accuracy, the wind turbine set can use the sensing device of the present embodiment to accurately obtain the relative humidity of the environment, thereby accurately realizing automatic control according to the obtained relative humidity, reducing problems such as misjudgment and malfunction in the wind turbine set, and thus ensuring the stable operation of the wind turbine set.

[0087] In the relevant embodiments, the sensing device adopts a capacitive humidity sensor or an acoustic temperature and humidity sensor 2. The structure of the capacitive humidity sensor is a flat plate capacitor. The upper and lower electrodes constitute two upper and lower plates. The humidity-sensitive film in the middle changes the dielectric constant by absorbing water molecules to cause the capacitance value of the flat plate capacitor to change. Therefore, the capacitive humidity sensor can be used to detect the relative humidity of the air; and the principle of the acoustic temperature and humidity sensor 2 is to use the fact that when water molecules are adsorbed on hydrophilic materials, the mechanical properties will change. Since the material absorbs the surrounding water vapor, it will cause a change in density, and the change in material density will cause the frequency of the sound waves passing through it to change. Therefore, the acoustic humidity sensor can be used to detect the relative humidity of the air.

[0088] Among them, whether it is a capacitive humidity sensor or an acoustic temperature and humidity sensor 2, the wind speed in the wind field in which it is located cannot be controlled, resulting in a large error in the value of the dry-bulb coefficient A, which in turn leads to low measurement accuracy of relative humidity. The sensing device of this embodiment can control the wind speed of the wind field, thereby greatly reducing the error of the dry-bulb coefficient A, and effectively improving the measurement accuracy of relative humidity.

[0089] At the same time, the capacitive humidity sensor requires the entire moisture-sensitive film to completely absorb moisture in order to truly measure the relative humidity. Therefore, it has the overall disadvantages of long moisture absorption time and slow response speed. Similarly, the acoustic temperature and humidity sensor 2 also has the same disadvantages. In addition, the acoustic temperature and humidity sensor 2 also needs to control the surrounding noise, so the usage scenarios are limited and the application capabilities are not strong.

[0090] The sensing device of this embodiment uses a highly sensitive platinum resistance thermometer probe, which can effectively shorten the response time, increase the response speed, and thus achieve instantaneous measurement.

[0091] Therefore, the test system using the sensor device of this embodiment not only has high measurement accuracy but also has a high response speed, thereby meeting different application requirements.

[0092] The test system can be a system for long-term continuous detection, short-term instantaneous detection, etc., including humidity detection in feasibility tests and use in industrial production. For example: the test system can be a dry-wet cycle detection test system. The material needs to undergo a dry-wet cycle test (such as a dry-wet cycle durability test for concrete). The dry-wet cycle detection test system can use the high response speed and measurement accuracy of the sensor device to reflect the influence of relative humidity on the material in real time and accurately, thereby improving the accuracy of the test; the test system can be an environmental acceleration test system, which accelerates the material environment by increasing the temperature and humidity and shortening the action time of different temperature and humidity environments. The environmental acceleration test system can use the high response speed and measurement accuracy of the sensor device to achieve accurate instantaneous acquisition, thereby improving the accuracy of the test; the test system can be a fan scale wind tunnel test system. The fan scale wind tunnel test system uses the high response speed and measurement accuracy of the sensor device to achieve accurate control of relative humidity, so that the wind tunnel test can be carried out in an extremely constant relative humidity environment, thereby improving the accuracy of the test.

[0093] Embodiment 1:

[0094] According to the sensing device of this embodiment, the first temperature is 30° C., the second temperature is 29° C., and the wind speed of the wind field is 3 m / s.

[0095] The first temperature and the second temperature are respectively substituted into the fourth formula to convert into Calvin K, and the first temperature is obtained to be 303.15K and the second temperature is 302.15K.

[0096] The first temperature and the second temperature converted into Calvin are respectively substituted into the third formula to calculate the saturated water vapor pressure at the first temperature and the saturated water vapor pressure at the second temperature.

[0097] Saturated water vapor pressure at the first temperature: InE=53.67957-6743.769 / 303.15-4.8451In303.15=3.748, E=42.436hPa.

[0098] Saturated water vapor pressure at the second temperature: InE=53.67957-6743.769 / 302.15-4.8451In302.15=3.690, E=40.045hPa.

[0099] It is found through experiments that when the wind speed is 3 m / s, the dry-bulb coefficient is approximately 0.0067, so in this embodiment, A is temporarily set to 0.0067.

[0100] The saturated water vapor pressure at the first temperature, the saturated water vapor pressure at the second temperature, the dry-bulb coefficient, the pressure of the air, the first temperature and the second temperature are substituted into the first formula to calculate the relative humidity of the air.

[0101] Relative humidity of air: U=(40.045-0.0067×1013.25×(30-29)) / 42.436×100%=78.37%.

[0102] Embodiment 2:

[0103] According to the sensing device of this embodiment, the first temperature is 31° C., the second temperature is 30.5° C., and the wind speed of the wind field is 3 m / s.

[0104] Substituting the first temperature and the second temperature into the fourth formula respectively to convert into Calvin K, the first temperature is 304.15K and the second temperature is 303.65K.

[0105] The first temperature and the second temperature converted into Calvin are respectively substituted into the third formula to calculate the saturated water vapor pressure at the first temperature and the saturated water vapor pressure at the second temperature.

[0106] Saturated water vapor pressure at the first temperature: InE=53.67957-6743.769 / 304.15-4.8451In304.15=3.805, E=44.925hPa.

[0107] Saturated water vapor pressure at the second temperature: InE=53.67957-6743.769 / 303.65-4.8451In303.65=3.777, E=43.685hPa.

[0108] It is found through experiments that when the wind speed is 3 m / s, the dry-bulb coefficient is approximately 0.0067, so in this embodiment, A is temporarily set to 0.0067.

[0109] The saturated water vapor pressure at the first temperature, the saturated water vapor pressure at the second temperature, the dry-bulb coefficient, the pressure of the air, the first temperature and the second temperature are substituted into the first formula to calculate the relative humidity of the air.

[0110] Relative humidity of air: U=(43.685-0.0067×1013.25×(31-30.5)) / 44.925×100%=74.57%.

[0111] Embodiment three:

[0112] According to the sensing device of this embodiment, the first temperature is 30° C., the second temperature is 28° C., and the wind speed of the wind field is 3 m / s.

[0113] Substituting the first temperature and the second temperature into the fourth formula respectively to convert into Calvin K, the first temperature is 303.15K and the second temperature is 301.15K.

[0114] The first temperature and the second temperature converted into Calvin are respectively substituted into the third formula to calculate the saturated water vapor pressure at the first temperature and the saturated water vapor pressure at the second temperature.

[0115] Saturated water vapor pressure at the first temperature: InE=53.67957-6743.769 / 303.15-4.8451In303.15=3.748, E=42.436hPa.

[0116] Saturated water vapor pressure at the second temperature: InE=53.67957-6743.769 / 301.15-4.8451In301.15=3.632, E=37.788hPa.

[0117] It is found through experiments that when the wind speed is 3 m / s, the dry-bulb coefficient is approximately 0.0067, so in this embodiment, A is temporarily set to 0.0067.

[0118] The saturated water vapor pressure at the first temperature, the saturated water vapor pressure at the second temperature, the dry-bulb coefficient, the pressure of the air, the first temperature and the second temperature are substituted into the first formula to calculate the relative humidity of the air.

[0119] Relative humidity of air: U=(37.788-0.0067×1013.25×(30-28)) / 42.436×100%=57.05%.

[0120] It should be noted that, in the description of the present disclosure, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, the meaning of "plurality" is two or more.

[0121] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0122] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0123] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A wind farm structure, characterized in that: include: An air duct, wherein the air duct is arranged in an arc shape, and an air inlet is arranged at one end of the air duct, and an air outlet is arranged at the other end of the air duct; An air duct, wherein the air duct is arranged inside the air duct, and an air outlet end of the air duct is connected to the air inlet, and the air inlet end of the air duct extends in a direction away from the air outlet; A controllable wind source is used to form a wind field in the wind duct along the direction from the air inlet to the air outlet.

2. The wind farm structure according to claim 1, characterized in that: The air duct comprises: A plurality of meshes are provided at the air inlet end of the air duct.

3. The wind farm structure according to claim 2, characterized in that: The air duct also includes: The filter net is sleeved on the air inlet end of the air duct, and the filter net covers a plurality of the mesh holes, and the air permeability of the filter net is greater than a set threshold.

4. The wind farm structure according to claim 1, characterized in that: The air outlet is arranged along the length direction of the air duct.

5. The wind farm structure according to claim 1, characterized in that: The wind farm structure also includes: A wind speed sensor, wherein the detection end of the wind speed sensor is arranged in the wind duct, and the output end of the wind speed sensor is connected to the input end of the controllable wind source.

6. The wind farm structure according to claim 1, characterized in that: The controllable wind source comprises: A fan blade, the fan blade is rotatably arranged in the air duct, and the fan blade is close to the air inlet; A drive motor is connected to the fan blades in a transmission manner, and the drive motor is used to drive the fan blades to rotate so that the wind field is formed in the air duct along the direction from the air inlet to the air outlet.

7. A sensor device for a wind turbine, characterized in that: include: The wind farm structure according to any one of claims 1 to 6; A temperature and humidity sensor, wherein the temperature and humidity sensor comprises a dry-bulb thermometer and a wet-bulb thermometer, wherein the dry-bulb thermometer and the wet-bulb thermometer are respectively arranged in the air duct of the wind field structure.

8. The sensor device for a wind turbine according to claim 7, characterized in that: The arc shape of the air duct is a three-quarter arc, and the dry-bulb thermometer and the wet-bulb thermometer are respectively arranged between one-third of the air duct and two-thirds of the air duct.

9. The sensor device for a wind turbine according to claim 7, characterized in that: The dry-bulb thermometer and / or the wet-bulb thermometer is a platinum resistance thermometer.

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