An angle adjustment mechanism for the direction probe of a closed test section

Abstract

The present invention discloses an angle adjustment mechanism for a direction probe in a closed test section, which includes a direction probe, and also includes a test section with both ends open along the axial direction, a plenum chamber located below the test section, and a probe support mechanism installed in the plenum chamber. The probe support mechanism is used to connect the direction probe, and the direction probe is located in the test section. The probe support mechanism includes a pitch angle adjustment mechanism and a sideslip angle adjustment mechanism. The pitch angle adjustment mechanism is used to adjust the pitch angle of the direction probe, and the sideslip angle adjustment mechanism is used to adjust the sideslip angle of the direction probe. The present invention provides an angle adjustment mechanism for a direction probe in a closed test section to solve the problem that the direction probe adjustment mechanism in the prior art cannot be adapted to the closed test section wind tunnel and cannot be used in the closed test section wind tunnel, and achieve the purpose of being able to carry out the calibration operation of the direction probe in the wind tunnel of the closed test section and improving the calibration accuracy of the direction probe.

Description

Technical Field

[0001] The present invention relates to the field of measuring wind tunnel flow field parameters, and particularly to an angle adjustment mechanism for a direction probe in a closed test section. Background Art

[0002] A direction probe is a pneumatic probe for measuring three-dimensional flow field parameters, which can be used to obtain parameter information such as the air flow velocity, air flow direction, total pressure, and static pressure in a three-dimensional flow field. It has good stiffness and machinability and is widely used in aerodynamic related tests and technical research; for example: in the aviation field, the test data of the direction probe is an important reference for correcting the flight angle parameters of an aircraft; in the field of aero-engines, the direction probe is the main method for obtaining the air flow parameters between blade stages; in the wind tunnel test field, the test data of the direction probe is the assessment basis for the air flow deflection index. The above fields have relatively high requirements for the test accuracy of the direction probe, and calibration is required to ensure data accuracy. At the same time, each pressure measurement hole of the direction probe actually has different mechanical characteristics due to processing factors, and each pressure measurement hole has different aerodynamic characteristics with different air flow conditions. In order to ensure the quality of test data, each probe must undergo strict calibration.

[0003] Most of the direction probe calibration work in the prior art is carried out based on a wind tunnel with an open test section, and the corresponding probe angle adjustment mechanism is also designed based on the open test section and normal temperature state, and cannot be used in a wind tunnel with a closed test section. Calibrating a direction probe based on a wind tunnel with an open test section has the advantages that the design of the adjustment mechanism is not restricted by space and is easy to install. However, due to the characteristics of the wind tunnel with an open test section, it cannot achieve the functions of temperature adjustment and pressure regulation, and also limits the wind speed to a relatively low level, and cannot increase the transonic or supersonic wind speed.

[0004] The inventors' team of this case found during the research process that the calibration of the direction probe has a strong correlation with the Mach number of the flow field, and the Mach number is the derived result of the flow field pressure, temperature, and velocity. Therefore, for each probe under different angle conditions, calibration tests of flow fields with different pressures, temperatures, and velocities need to be carried out to improve the calibration accuracy. The number of calibration points is at least hundreds of points and at most thousands of points, and the calibration workload is very large. When using the adjustment mechanism based on the wind tunnel with an open test section in the prior art, there are at least the following limitations: First, the flow field temperature of the wind tunnel with an open test section is normal temperature, and the calibration result cannot correct the error influence caused by high and low temperature changes; Second, the flow field wind speed of the wind tunnel with an open test section is much lower than that of the flow field of the closed test section, resulting in a limited calibration range of the wind speed of the direction probe; Third, the wind tunnel with an open test section cannot adjust the pressure and cannot achieve the calibration of the direction probe under the state of pressure change.

[0005] Therefore, if the calibration of the direction probe can be carried out based on the wind tunnel with a closed test section, the calibration accuracy can be significantly improved. However, the direction probe adjustment mechanisms in the existing technologies cannot be adapted to the wind tunnel with a closed test section and cannot be used in the wind tunnel with a closed test section. Summary of the Invention

[0006] The present invention provides an angle adjustment mechanism for a direction probe in a closed test section to solve the problem that the direction probe adjustment mechanism in the existing technology cannot be adapted to the wind tunnel with a closed test section and cannot be used in the wind tunnel with a closed test section, and to achieve the purpose of being able to carry out the calibration operation of the direction probe in the wind tunnel of the closed test section and improving the calibration accuracy of the direction probe.

[0007] The present invention is realized through the following technical solutions:

[0008] An angle adjustment mechanism for a direction probe in a closed test section includes a direction probe, and also includes a test section with both ends open along the axis, a plenum chamber located below the test section, and a probe support mechanism installed in the plenum chamber. The probe support mechanism is used to connect the direction probe, and the direction probe is located in the test section; the probe support mechanism includes a pitch angle adjustment mechanism and a sideslip angle adjustment mechanism. The pitch angle adjustment mechanism is used to adjust the pitch angle of the direction probe, and the sideslip angle adjustment mechanism is used to adjust the sideslip angle of the direction probe.

[0009] Aiming at the problem that the direction probe adjustment mechanism in the existing technology cannot be adapted to the wind tunnel with a closed test section and cannot be used in the wind tunnel with a closed test section, the present invention proposes an angle adjustment mechanism for a direction probe in a closed test section, in which the test section and the plenum chamber are distributed up and down. The direction probe is located in the test section and is supported by the probe support mechanism. The probe support mechanism is installed in the plenum chamber, and the pitch angle of the direction probe is adjusted through the pitch angle adjustment mechanism therein, and the sideslip angle of the direction probe is adjusted through the sideslip angle adjustment mechanism therein.

[0010] When the present application is specifically used, the test section is connected to the existing wind tunnel with a closed test section, so that the flow channel size in the test section and the mechanical interfaces between the test section and the upstream and downstream sections are consistent with the existing wind tunnel with a closed test section. The direction probe to be calibrated is installed on the probe support mechanism. After obtaining the initial pitch angle and the initial sideslip angle, the wind tunnel test is started. During the test process, the pitch angle and the sideslip angle are flexibly adjusted as needed to change, so as to realize the rapid measurement of a large number of calibration points, significantly reducing the calibration workload. At the same time, compared with the existing technology, the present application can be adapted to the wind tunnel with a closed test section and can be used in the wind tunnel with a closed test section, overcoming the defect that the existing technology can only be calibrated at normal temperature, normal pressure and relatively low wind speed, and can realize the calibration of the direction probe at different temperatures, different pressures and a wider wind speed state, significantly improving the calibration accuracy of the direction probe and being beneficial to broadening the use environment and operating conditions of the direction probe.

[0011] Further, the probe support mechanism further includes a support rod and a probe clamping device connected to the top end of the support rod. The probe clamping device is used to clamp the direction probe. In this solution, the probe clamping device is located inside the test section, and part of the support rod is located inside the test section and part is located inside the plenum chamber.

[0012] Further, the support rod has a hollow structure, and a perforation is provided on the side wall of the top of the support rod. During the use of the direction probe, an air duct hose needs to be connected. In this solution, the air duct hose penetrates into the support rod through the perforation at the top of the support rod and is led out through the hollow support rod and finally penetrates out of the plenum chamber. This setting can reduce the interference of the air duct hose of the direction probe on the flow field of the closed test section wind tunnel, and at the same time avoid adverse conditions such as shaking caused by a large amount of exposure of the air duct hose in the wind tunnel under high-speed flow fields (such as transonic or supersonic wind speeds), thereby improving the calibration accuracy.

[0013] Further, the probe clamping device includes a connecting block, clamping heads and fairing heads detachably connected to opposite ends of the connecting block; the top end of the support rod is connected to the connecting block, the clamping heads are used to clamp the direction probe, and through holes for the direction probe to pass through are provided on both the connecting block and the fairing head.

[0014] When this solution is in use, the head of the direction probe is inserted into the fairing head, the connecting block and the clamping heads in sequence, and the direction probe is clamped by the clamping heads. Among them, the fairing head can be implemented by any existing fairing structure, and the clamping head can be implemented by any existing clamping method, and specific limitations are not made here. In this solution, both the clamping head and the fairing head are detachably connected to the connecting block. Therefore, clamping heads and fairing heads of different specifications or sizes can be flexibly replaced according to needs, which is beneficial to adapting to the calibration use of direction probes with different outer diameters, different lengths or different shapes, and at the same time can conveniently install and disassemble the direction probe. Since the connecting block remains relatively fixed compared with the support rod, different direction probes can also maintain a relatively stable position with the connecting block after installation, which is beneficial to ensuring a high coaxiality of different direction probes after installation, thereby improving the calibration consistency.

[0015] Further, a first mounting surface is provided on the top of the connecting block, and a second mounting surface is provided on the side wall of the connecting block. The first mounting surface and the second mounting surface are perpendicular to each other; a spirit level is detachably connected to the first mounting surface, an extension rod is detachably connected to the second mounting surface, the length direction of the extension rod is parallel to the axial direction of the through hole, and a first mirror positioning device for connecting a mirror is provided at one end of the extension rod away from the connecting block.

[0016] Both the first mounting surface and the second mounting surface in this solution are flat surfaces. The first mounting surface is used to mount a level, facilitating the initial installation and positioning of the direction probe. The second mounting surface is used to mount an extension rod, which extends towards the end of the direction probe. A mirror can be temporarily connected to it and cooperate with an external collimator to provide a guarantee for obtaining the initial sideslip angle.

[0017] Furthermore, the pitch angle adjustment mechanism includes an arc-shaped guide rail, a slider slidably engaged with the arc-shaped guide rail, and a first power mechanism for driving the slider to slide along the arc-shaped guide rail. The support rod is arc-shaped, and the centers of the support rod and the arc-shaped guide rail are both located on the axis of the test section.

[0018] In this solution, the first power mechanism drives the slider to make a circular motion along the arc-shaped guide rail, and then drives the support rod to make a circular motion synchronously, realizing the adjustment of the pitch angle of the direction probe. In addition, both the support rod and the arc-shaped guide rail in this solution are arc-shaped structures and are coaxial, which is beneficial to ensuring that the head position of the direction probe remains unchanged during the operation of the pitch angle adjustment mechanism, and further ensuring that the probe head is always located at the core flow of the device test section. Among them, the first power mechanism can drive the slider to slide along the arc-shaped guide rail in any existing manner, and its specific driving method is not specifically limited here, as long as the driving accuracy meets the set requirements.

[0019] Furthermore, the sideslip angle adjustment mechanism includes a turntable, a second power mechanism for driving the turntable to rotate, and a mounting bracket located on the turntable. The arc-shaped guide rail is connected to the mounting bracket.

[0020] In this solution, the second power mechanism drives the turntable to rotate, driving the mounting bracket, the arc-shaped guide rail and the support rod to rotate synchronously, and then realizing the adjustment of the sideslip angle of the direction probe. Among them, the second power mechanism can drive the turntable to rotate in any existing manner, and its specific driving method is not specifically limited here, as long as the driving accuracy meets the set requirements.

[0021] Furthermore, a second mirror positioning device is also provided on the side wall of the test section. The second mirror positioning device is used to connect the mirror to the inner wall of the test section.

[0022] Before starting the calibration, a mirror can be temporarily connected at the second mirror positioning device and cooperate with an external collimator to provide a guarantee for obtaining the initial sideslip angle.

[0023] Both the first mirror positioning device and the second mirror positioning device in this application can be realized by any existing device that can temporarily connect the mirror, and are not specifically limited here.

[0024] Further, an observation window is provided on the surface of the test section. When obtaining the initial sideslip angle of the direction probe, it is necessary to cooperate with a collimator outside the mechanism. Therefore, the existence of the observation window can ensure the smooth optical path between the collimator and the mirror inside the test section, avoiding the use of a complex optical path design and reducing the installation and initialization difficulty of this application. In addition, the existence of the observation window also facilitates the staff to observe the internal situation of the test section with the naked eye before and after calibration and promptly discover fault conditions, etc.

[0025] Further, a heat preservation device located outside the test section and / or the stagnation chamber is also included to meet the calibration requirements of this application under high temperature or low temperature, which is beneficial to ensuring the stability of the temperature field in the test area. Any existing external heat preservation means can be applied to the heat preservation device of this application.

[0026] Compared with the prior art, the present invention has at least the following advantages and beneficial effects:

[0027] 1. The angle adjustment mechanism of the direction probe for the closed test section of the present invention can be adapted to the wind tunnel of the closed test section and can be used in the wind tunnel of the closed test section. It overcomes the defect that the prior art can only be calibrated at normal temperature, normal pressure and relatively low wind speed, and can realize the calibration of the direction probe under different temperatures, different pressures, and a wider wind speed range, significantly improving the calibration accuracy of the direction probe and being beneficial to broadening the use environment and operating conditions of the direction probe.

[0028] 2. The angle adjustment mechanism of the direction probe for the closed test section of the present invention can be flexibly adjusted according to needs during the test process to change the pitch angle and sideslip angle, that is, it can realize the rapid measurement of a large number of calibration points, significantly reducing the calibration workload.

[0029] 3. The angle adjustment mechanism of the direction probe for the closed test section of the present invention can reduce the interference of the gas path hose of the direction probe on the flow field of the wind tunnel of the closed test section, and at the same time avoid adverse conditions such as shaking caused by a large amount of exposure of the gas path hose in the wind tunnel under a high-speed flow field, thereby improving the calibration accuracy.

[0030] 4. The angle adjustment mechanism of the direction probe for the closed test section of the present invention can be adapted to the calibration use of direction probes with different outer diameters, different lengths or different shapes, and at the same time can conveniently realize the installation and disassembly of the direction probe, which is beneficial to ensuring a high coaxiality after the installation of different direction probes, thereby improving the calibration consistency.

[0031] 5. The angle adjustment mechanism of the direction probe for the closed test section of the present invention can simply and conveniently obtain the initial installation angle of the direction probe, which is convenient for angle correction during the calibration process of the direction probe.

[0032] 6. The angle adjustment mechanism of the direction probe in the closed test section of the present invention can ensure that the head of the direction probe is always located at the core flow of the test section during the angle adjustment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0034] Figure 1 is a schematic structural diagram of a specific embodiment of the present invention;

[0035] Figure 2 is a schematic structural diagram of the specific embodiment of the present invention with the insulation device hidden;

[0036] Figure 3 is a schematic structural diagram of the test section in the specific embodiment of the present invention;

[0037] Figure 4 is a split schematic diagram of the test section and the probe support mechanism in the specific embodiment of the present invention;

[0038] Figure 5 is a schematic structural diagram of the probe support mechanism in the specific embodiment of the present invention;

[0039] Figure 6 is a schematic structural diagram of the probe clamping device in the specific embodiment of the present invention;

[0040] Figure 7 is a partial schematic diagram of the mirror installed on the first mirror positioning device in the specific embodiment of the present invention;

[0041] Figure 8 is a partial schematic diagram of the mirror installed on the second mirror positioning device in the specific embodiment of the present invention.

[0042] Reference numerals in the drawings and corresponding component names:

[0043] 1 - test section, 2 - plenum chamber, 3 - direction probe, 4 - second mirror positioning device, 5 - observation window, 6 - insulation device, 7 - opening, 8 - plenum chamber bracket, 9 - universal wheel, 10 - universal foot cup, 11 - mirror;

[0044] 101 - support rod, 102 - perforation;

[0045] 201 - connection block, 202 - clamping head, 203 - fairing head, 204 - first mirror positioning device, 205 - first mounting surface, 206 - second mounting surface, 207 - extension rod;

[0046] 301 - Arc-shaped guide rail, 302 - Slide block, 303 - Turntable, 304 - Mounting bracket, 305 - First motor, 306 - Arc-shaped rack, 307 - Second motor, 308 - Pitch limit switch, 309 - Grating scale, 310 - Positioning disk, 311 - Encoder. Detailed implementation manner

[0047] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments and the accompanying drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention. In the description of the present application, it should be understood that the orientation or positional relationships indicated by terms such as "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the protection scope of the present application.

[0048] Embodiment 1

[0049] As Figures 1 to 5 shown, a direction probe angle adjustment mechanism for a closed test section includes a test section 1 with both ends open axially, a stationary chamber 2 located below the test section 1, and a probe support mechanism installed in the stationary chamber 2. The probe support mechanism is used to connect a direction probe 3, and the direction probe 3 is located in the test section 1; the probe support mechanism includes a pitch angle adjustment mechanism and a sideslip angle adjustment mechanism. The pitch angle adjustment mechanism is used to adjust the pitch angle of the direction probe 3, and the sideslip angle adjustment mechanism is used to adjust the sideslip angle of the direction probe 3.

[0050] The probe support mechanism further includes a support rod 101 and a probe clamping device connected to the top of the support rod 101. The probe clamping device is used to clamp the direction probe 3.

[0051] The pitch angle adjustment mechanism includes an arc-shaped guide rail 301, a slide block 302 slidably matched with the arc-shaped guide rail 301, and a first power mechanism for driving the slide block 302 to slide along the arc-shaped guide rail 301; the support rod 101 is arc-shaped, and the centers of the support rod 101 and the arc-shaped guide rail 301 are both located on the axis of the test section 1. Among them, the arc-shaped guide rail extends longitudinally.

[0052] The sideslip angle adjustment mechanism includes a turntable 303, a second power mechanism for driving the turntable 303 to rotate, and a mounting bracket 304 located on the turntable 303. The arc-shaped guide rail 301 is connected to the mounting bracket 304.

[0053] It also includes a heat preservation device 6 located outside the test section 1 and / or the stationary chamber 2.

[0054] In this embodiment, the test section 1, the probe support mechanism and the stationary chamber 2 are formed as a sealed whole and are sealed from the outside.

[0055] In this embodiment, the control accuracy of the first power mechanism over the pitch angle and the second power mechanism over the sideslip angle is better than ±0.05°.

[0056] Preferably, Figure 5 As shown: the first power mechanism in this embodiment includes a first motor 305, the output end of the first motor 305 is meshed with an arc rack 306 through a gear, and the arc rack 306 is fixed on the arc guide rail 301 and the two are coaxial; the second power mechanism includes a second motor 307, and the output end of the second motor 307 drives the turntable 303 through a gear / gear set. The first motor 305 and the second motor 307 are preferably servo motors.

[0057] Preferably, it also includes a grating ruler 309 matched with the first power mechanism and an encoder 311 matched with the second power mechanism; the grating ruler 309 and the encoder 311 are respectively used to accurately position the pitch angle adjustment mechanism and the side slip angle adjustment mechanism to improve the angle adjustment accuracy. A pitch limit switch 308 matched with the slider 302 can also be set on the mounting frame 304 to prevent the slider 302 from detaching from the arc guide rail 301. A side slip limit switch matched with the turntable 303 can also be set to limit the rotation range of the turntable 303.

[0058] More preferably, Figure 4 and Figure 5 As shown, a positioning plate 310 is fixedly connected to the top of the mounting frame 304, and an opening 7 matching the positioning plate 310 is provided at the bottom of the test section 1. When the station chamber 2 is connected to the test section 1, the positioning plate 310 just blocks the opening 7. The positioning plate 310 is provided with a hole for the support rod 101 to pass through, and of course, the hole can allow the support rod 101 to adjust the pitch angle within the travel range.

[0059] More preferably, at least the portion of the support rod 101 extending into the interior of the test section 1 is a cylindrical structure to reduce flow field resistance.

[0060] More preferably, the support rod 101 and the arc-shaped guide rail 301 are both arc-shaped structures and are coaxial, and the axes of the two are preferably collinear with the axis of the test section 1 .

[0061] More preferably, the heat preservation device 6 is a heat preservation box or a heat preservation layer; the heat preservation device 6 of the test section 1 is a structure that is convenient to open, close or disassemble. The heat preservation box or the heat preservation layer includes a polyurethane foam board, and may also include an aluminum foil layer superimposed on the inner wall of the polyurethane foam board.

[0062] More preferably, an openable plugging plate is provided on the surface of the test section 1, and when the plugging plate is closed, an airtight connection is maintained between the body of the test section 1. The plugging plate is preferably located at the top of the test section 1.

[0063] Example 2

[0064] A closed test section direction probe angle adjustment mechanism, based on embodiment 1, as Figures 1 to 8 As shown, the support rod 101 is a hollow structure, and a through hole 102 is provided on the top side wall of the support rod 101 .

[0065] In this embodiment, the air hose matching the direction probe 3 is led out from the end of the direction probe, penetrates into the support rod 101 through the perforation 102, and passes out from the end of the support rod 101. After reserving a certain length of movable section, it is fixed on the mounting frame 304, extends downward along the mounting frame 304, then passes through the turntable 303 and leads out, and then seals and passes out of the resident chamber 2.

[0066] The probe clamping device includes a connection block 201, a clamping head 202 and a rectifier head 203 detachably connected to opposite ends of the connection block 201, and the rectifier head 203 has a rectifier appearance. The top end of the support rod 101 is fixedly connected to the connection block 201, the clamping head 202 is used to clamp the direction probe 3, and the connection block 201 and the rectifier head 203 are both provided with through holes for the direction probe 3 to pass through.

[0067] In this embodiment, a first mounting surface 205 is set on the top of the connecting block 201, and a second mounting surface 206 is set on the side wall of the connecting block 201, and the first mounting surface 205 and the second mounting surface 206 are perpendicular to each other; a spirit level can be detachably connected to the first mounting surface 205, and an extension rod 207 can be detachably connected to the second mounting surface 206, and the length direction of the extension rod 207 is parallel to the axial direction of the through hole, and a first reflector positioning device 204 for connecting a reflector is set at one end of the extension rod 207 away from the connecting block 201.

[0068] In this embodiment, a second reflector positioning device 4 is further provided on the side wall of the test section 1 , and the second reflector positioning device 4 is used to connect the reflector to the inner wall of the test section 1 .

[0069] The left and / or right surfaces of the test section 1 are provided with an observation window 5, which is preferably made of optical glass.

[0070] Preferably, the clamping head 202 is provided with a matching set screw. After inserting the end of the direction probe 3 into the clamping head 202, clamping is achieved by tightening the set screw.

[0071] Preferably, both the first mirror positioning device 204 and the second mirror positioning device 4 adopt magnetic components, and the back of the corresponding mirror has a magnetic metal object that can be magnetically adsorbed. The magnetic components can be realized by, for example, neodymium magnets.

[0072] More preferably, the second mirror positioning device 4 includes an installation groove opened on the outer wall of the test section 1, and the corresponding magnetic component is fixed in the installation groove.

[0073] Embodiment 3

[0074] A direction probe angle adjustment mechanism for a closed test section, based on Embodiment 1 or 2, as Figure 1 and Figure 2 shown, further includes a test section support 8 for carrying the test section 2. Universal wheels 9 and universal feet 10 are installed at the bottom of the test section support 8. After moving the adjustment mechanism of the present application into place, rotating the universal feet 10 can adjust the height of the test section support 8, and further adjust the height of the test section 1 to better match the existing closed test section. In addition, if the universal feet 10 are adjusted to different heights, the overall inclination degree of the present application in different directions can be adjusted, which is more convenient for installation and alignment.

[0075] Embodiment 4

[0076] Based on the usage method of the direction probe angle adjustment mechanism for the closed test section in any of the above embodiments, it includes the following steps:

[0077] S1. Move the direction probe angle adjustment mechanism for the closed test section to the wind tunnel closed test section, adjust the height so that the heights of the two axial ends of the test section 1 are the same as those of the front and rear sections of the wind tunnel, and tighten the connection with bolts;

[0078] S2. Open the test section 1, install the direction probe 3 into the probe clamping device, and adjust the front and rear distances of the direction probe 3 to keep the tip of the probe at the center position of the test section 1;

[0079] S3. Measure the initial pitch angle and initial sideslip angle of the direction probe 3;

[0080] S4. Close the test section 1, start the wind tunnel, and control the actions of the pitch angle adjustment mechanism and the sideslip angle adjustment mechanism according to the design scheme to calibrate the direction probe.

[0081] Among them, opening and closing the test section 1 can be achieved by opening or closing the plug plate on the surface of the test section.

[0082] More preferably, in step S3, the initial pitch angle of the direction probe 3 is measured by the following method: A level is installed on the first mounting surface 205 at the top of the connecting block 201, and the initial pitch angle is measured based on the display of the level.

[0083] More preferably, in step S3, the initial sideslip angle of the direction probe 3 is measured by the following method:

[0084] S301. Place a collimator outside the test section 1 so that the optical path between the collimator and the direction probe 3 is linearly conducted through the observation window 5;

[0085] S302. Install the mirror 11 on the side wall inside the test section 1 opposite to the observation window 5 through the second mirror positioning device 4, and measure the first angle through the collimator; Remove the mirror;

[0086] S303. Install the extension rod 207 on the second mounting surface 206, install the mirror 11 on the extension rod 207 through the first mirror positioning device 204, and measure the second angle through the collimator; Remove the mirror;

[0087] S304. Based on the first angle and the second angle, the initial sideslip angle can be calculated. The specific calculation method of the initial sideslip angle here belongs to the general technology in this field and can be completed through simple mathematical operations, so it will not be elaborated here.

[0088] The specific embodiments described above have further detailed the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0089] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. In addition, the term "connected" used in this article, without special explanation, can be directly connected or indirectly connected through other components.

Claims

1. A closed test section direction probe angle adjustment mechanism, comprising a direction probe (3), characterized in that: It also comprises a test section (1) open at both ends along the axial direction, a stationary chamber (2) located below the test section (1), and a probe support mechanism installed in the stationary chamber (2), the probe support mechanism being used to connect the direction probe (3), the direction probe (3) being located in the test section (1); the probe support mechanism comprising a pitch angle adjustment mechanism and a sideslip angle adjustment mechanism, the pitch angle adjustment mechanism being used to adjust the pitch angle of the direction probe (3), and the sideslip angle adjustment mechanism being used to adjust the sideslip angle of the direction probe (3); The probe support mechanism further comprises a support rod (101) and a probe clamping device connected to the top end of the support rod (101), the probe clamping device being used to clamp the direction probe (3); The support rod (101) has a hollow structure, and a through hole (102) is provided on the top side wall of the support rod (101); The pitch angle adjustment mechanism comprises an arc-shaped guide rail (301), a slider (302) slidably matched with the arc-shaped guide rail (301), and a first power mechanism for driving the slider (302) to slide along the arc-shaped guide rail (301); the support rod (101) is arc-shaped, and the center of the support rod (101) and the center of the arc-shaped guide rail (301) are both located on the axis of the test section (1); The sideslip angle adjustment mechanism comprises a rotating disk (303), a second power mechanism for driving the rotating disk (303) to rotate, and a mounting frame (304) located on the rotating disk (303), and the arc-shaped guide rail (301) is connected to the mounting frame (304).

2. A closed test section direction probe angle adjustment mechanism according to claim 1, characterized in that: The probe clamping device comprises a connecting block (201), a clamping head (202) and a rectifying head (203) detachably connected to opposite ends of the connecting block (201); the top end of the support rod (101) is connected to the connecting block (201), the clamping head (202) is used to clamp the direction probe (3), and the connecting block (201) and the rectifying head (203) are both provided with through holes for the direction probe (3) to pass through.

3. The closed test section direction probe angle adjustment mechanism according to claim 2, characterized in that: A first mounting surface (205) is arranged on the top of the connection block (201), and a second mounting surface (206) is arranged on the side wall of the connection block (201); the first mounting surface (205) and the second mounting surface (206) are perpendicular to each other; a level gauge is detachably connected to the first mounting surface (205), and an extension rod (207) is detachably connected to the second mounting surface (206); the length direction of the extension rod (207) is parallel to the axial direction of the through hole; and a first reflector positioning device (204) for connecting a reflector is arranged at one end of the extension rod (207) away from the connection block (201).

4. The closed test section direction probe angle adjustment mechanism according to claim 1, characterized in that: The side wall of the test section (1) is also provided with a second reflector positioning device (4), and the second reflector positioning device (4) is used to connect the reflector to the inner wall of the test section (1).

5. The closed test section direction probe angle adjustment mechanism according to claim 1, characterized in that: An observation window (5) is provided on the surface of the test section (1).

6. The closed test section direction probe angle adjustment mechanism according to claim 1, characterized in that: It also includes a heat preservation device (6) located outside the test section (1) and / or the stationary chamber (2).

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