CN111766037A - Mounting platform of standard pitot tube for small wind tunnel experiment flow field calibration and use method thereof - Google Patents
Mounting platform of standard pitot tube for small wind tunnel experiment flow field calibration and use method thereof Download PDFInfo
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- CN111766037A CN111766037A CN202010645943.5A CN202010645943A CN111766037A CN 111766037 A CN111766037 A CN 111766037A CN 202010645943 A CN202010645943 A CN 202010645943A CN 111766037 A CN111766037 A CN 111766037A
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- pitot tube
- lead screw
- standard pitot
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
- G01P21/025—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers for measuring speed of fluids; for measuring speed of bodies relative to fluids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
- G01P5/16—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid using Pitot tubes, e.g. Machmeter
- G01P5/165—Arrangements or constructions of Pitot tubes
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- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a mounting platform of a standard pitot tube for small wind tunnel experiment flow field calibration and a using method thereof. The device comprises a small wind tunnel test section mounting platform, a side lead screw motion system, a vertical lead screw motion system, a straddle lead screw motion system, a standard pitot tube mounting and fixing system and an automatic control system; the standard pitot tube is fixedly arranged on the detachable moving slide block, and the servo motor and each lead screw motion system are driven by the automatic control system to complete the motion and measurement of the standard pitot tube in a three-dimensional space. The invention is suitable for calibrating and measuring the quality of the wind tunnel flow field before a formal wind tunnel experiment, realizes accurate positioning and control by installing and fixing a standard pitot tube and utilizing a laser range finder and an automatic control system so as to finish accurate acquisition of flow field data at different positions in the wind tunnel. The method is simple in use, convenient to install, accurate in positioning, high in automation degree and suitable for small wind tunnel flow field calibration and measurement experiments with different measurement requirements.
Description
Technical Field
The invention discloses a mounting platform of a standard pitot tube for calibrating a small wind tunnel experiment flow field and a using method thereof, and particularly aims at measuring flow field data at any position in the small wind tunnel flow field.
Background
In order to ensure that the fluid motion state in the wind tunnel meets the experimental requirements during the wind tunnel experiment, measurement and calibration of indexes such as the wind speed range, the flow field uniformity and the flow field stability of the wind tunnel flow field are required to be performed by using measurement devices such as a standard pitot tube, a micro-pressure transformer and a temperature and humidity sensor before formal experiments. When a standard pitot tube is used for measurement, the position of the pitot tube needs to be constantly moved, the currently adopted method is a scheme that the pitot tube is held by a hand to measure or is fixed after fixed point measurement is carried out manually, the installation accuracy is low, meanwhile, when the uniformity of a flow field is corrected, a plurality of measuring points need to be arranged within the ranges of 90% and 80% of the width and the height of a measuring section, and the position of the pitot tube needs to be constantly updated and changed, so that the position of the pitot tube needs to be manually measured and adjusted when the measuring point is changed every time, the measurement efficiency is low, and the measurement accuracy cannot be guaranteed. In addition, when the wind speed in the flow field is high, the pitot tube is disturbed, the stability of the pitot tube is affected, and the accuracy of the measurement result is also affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a mounting platform of a standard pitot tube for calibrating a flow field of a small wind tunnel experiment and a using method thereof.
The invention discloses a mounting platform of a standard pitot tube for calibrating a small wind tunnel experiment flow field, which comprises a small wind tunnel test section mounting platform, two sets of lateral screw motion systems, two sets of vertical screw motion systems, a straddle screw motion system, a standard pitot tube mounting and fixing system and an automatic control system;
two sets of side lead screw motion systems are fixed on the small wind tunnel test section mounting platform, and side servo motors of the two sets of lead screw motion systems are connected through a motor synchronization device.
Two sets of side lead screw motion systems are respectively arranged on two sides of a small wind tunnel test section mounting platform, each set of side lead screw motion system is composed of a side servo motor, a side lead screw, a side guide rail and a side lead screw nut, the side servo motor drives the side lead screw to rotate, and the side lead screw is fixed on the upper side of the side guide rail.
The two sets of vertical lead screw motion systems are composed of vertical servo motors, vertical lead screws, vertical guide rails, vertical lead screw nuts and sliding blocks, the vertical servo motors drive the vertical lead screws to rotate, the vertical lead screws are fixed on one sides of the vertical guide rails, the bottoms of the vertical guide rails are matched with the side lead rails of the side lead screw systems through horizontal sliding blocks, and the horizontal sliding blocks are matched with the side lead screws through the side lead screw nuts.
The straddle type screw motion system is composed of a straddle type servo motor, a straddle type screw, a straddle type guide rail, a straddle type screw nut and a slide block, wherein the straddle type servo motor drives the straddle type screw to rotate, the straddle type screw is fixed on the upper side of the straddle type guide rail, the straddle type guide rail is matched with a vertical guide rail of the vertical type screw motion system through two vertical type slide blocks arranged at two ends, and the vertical type slide block is matched with the vertical type screw through the vertical type screw nut.
The standard pitot tube mounting and fixing system consists of a standard pitot tube, a detachable moving slide block and a supporting and limiting frame, wherein the detachable moving slide block is matched with a straddle screw rod through a straddle screw nut, the standard pitot tube is matched with the detachable moving slide block through a through hole formed in the detachable moving slide block, two parts of the detachable moving slide block are connected through bolts, the supporting and limiting frame is fixed on the detachable moving slide block through fastening screws, and the upper end of the standard pitot tube is provided with a horizontal output end and a vertical output end; the horizontal output end of the standard pitot tube is matched with the supporting and limiting frame through a through hole formed in the supporting and limiting frame, and the two output ends of the standard pitot tube are respectively and correspondingly connected with the input end of the micro-voltage transformer.
The automatic control system consists of an interactive panel, a laser range finder, a singlechip, a servo motor and a plurality of wires. The interactive panel is connected with a driving device of the servo motor through a lead, an output port of the laser range finder is connected with an input port of the single chip microcomputer through a lead, and an output port of the single chip microcomputer is connected with the driving device of the servo motor through a lead. The automatic control system takes a computer as an operation and interaction environment.
Among the above-mentioned technical scheme, further, the both ends of each lead screw all are provided with infrared ray collision alarm generator, on the basis of guaranteeing the normal work of moving system, prevent because the mistake of control system takes place the interference or the collision of mechanism, promote the security of whole mechanism.
Furthermore, the measuring head of the standard pitot tube is also provided with a laser range finder integrated block which is externally connected with a dome shell so as to reduce air resistance.
Furthermore, a servo motor of each lead screw motion system is connected with the single chip microcomputer, and the automatic control system performs feedback control on the servo motor of each lead screw motion system through the single chip microcomputer by combining position information of a point to be measured and position information fed back by the laser range finder integrated block, so that the standard pitot tube moves to different measuring points to perform accurate measurement.
The use method of the installation platform of the standard pitot tube for the calibration of the small wind tunnel experiment flow field comprises the following steps:
1) and (3) mounting and fixing the laser range finder integrated block on the head of a standard pitot tube, and measuring the distance between the integrated block and the head relative to the central axis of the standard pitot tube so as to eliminate measurement errors.
2) The method comprises the steps of disassembling a bolt capable of disassembling a movable sliding block to enable the two parts of the sliding block to be separated from each other, disassembling a fastening screw on a top cover of a support limiting frame, removing the top cover, putting a standard pitot tube into a through hole of the detachable sliding block, adjusting the direction of the standard pitot tube to enable the standard pitot tube to be opposite to the direction of air flow, adjusting the height of the standard pitot tube to enable the horizontal output end of the standard pitot tube to just fall into the through hole of the support limiting frame, covering the top cover, screwing the fastening screw on the top cover of the support limiting frame, combining the detachable movable. Two output ends of the standard pitot tube are correspondingly connected with the input end of the micro-voltage transformer respectively.
3) The fixed standard pitot tube realizes the movement in the Z direction through two sets of vertical lead screws, and realizes the two-dimensional movement of the standard pitot tube in an X-Y plane through two sets of side lead screws and a straddle lead screw. The laser range finder integrated block arranged on the head of the standard pitot tube can monitor the motion position of the standard pitot tube in real time and output the position information to an automatic control system. The position information of the point to be measured in the flow field is input into an automatic control system, the automatic control system controls the movement of each lead screw through a single chip microcomputer, the accurate measurement of different positions by a standard pitot tube is realized, and finally the flow field data of the corresponding position is obtained through a micro-pressure transformer connected with the automatic control system.
The invention has the beneficial effects that: the device can automatically, quickly and accurately complete the position adjustment work of the standard pitot tube, realize automatic control, reduce the times of manual adjustment and improve the measurement efficiency. The device can automatically realize the accurate positioning and control of the standard pitot tube by utilizing the automatic control system and the driving motor, and compared with the manual fixed-point installation arrangement, the device reduces the operation difficulty, improves the measurement accuracy and improves the automation degree and the measurement efficiency of the system. Meanwhile, for the measurement of flow field data of different measurement points, the free movement of the standard pitot tube in a three-dimensional space can be realized through each lead screw motion system, and the problem that the position of the measurement point needs to be manually adjusted every time the measurement point is changed is solved. The laser range finder can be used for accurately positioning the standard pitot tube, the measurement precision is high, and manual operation is not needed. The motion of a plurality of degrees of freedom of standard pitot tube can be restricted through supporting spacing, prevents that it from taking place the disturbance, guarantees the stability of device and measuring result's accuracy.
Drawings
FIG. 1 is a schematic view of a mounting platform of a standard pitot tube for small wind tunnel experiment flow field calibration according to the present invention;
FIG. 2 is a schematic structural diagram of a side lead screw system of a mounting platform of a standard pitot tube for small wind tunnel experiment flow field calibration according to the present invention;
FIG. 3 is a schematic structural view of a vertical screw system of a mounting platform of a standard pitot tube for small wind tunnel experiment flow field calibration according to the present invention;
FIG. 4 is a schematic structural view of a straddle screw system of a mounting platform of a standard pitot tube for small wind tunnel experiment flow field calibration according to the present invention;
FIG. 5 is a schematic structural view of a standard pitot tube mounting and fixing system of a mounting platform of a standard pitot tube for small wind tunnel experiment flow field calibration according to the present invention;
FIG. 6 is a control flow chart of an automatic control system of a standard pitot tube mounting platform for small wind tunnel experiment flow field calibration according to the present invention;
in the figure, a small wind tunnel test section mounting platform 1, a laser range finder integrated block 2, a standard pitot tube 3, a side guide rail 4, a side servo motor 5, a side lead screw 6, an infrared collision alarm generator 7, a horizontal slide block 8, a vertical guide rail 9, a vertical slide block 10, a vertical lead screw 11, a vertical servo motor 12, a support limiting frame 13, a straddle servo motor 14, a straddle lead screw 15, a detachable movable slide block 16, a straddle guide rail 17 and a motor synchronizer 18.
Detailed Description
As shown in fig. 1, the installation platform of the standard pitot tube for the calibration and measurement of the small wind tunnel experiment flow field comprises a small wind tunnel test section installation platform 1, two sets of lateral screw motion systems, two sets of vertical screw motion systems, a straddle screw motion system, a standard pitot tube installation fixing system and an automatic control system;
two sets of side lead screw motion systems are fixed on the small wind tunnel test section mounting platform 1, and side servo motors 5 of the two sets of side lead screw motion systems are connected through a motor synchronization device 18.
As shown in fig. 2, the side lead screw system is a schematic structural diagram, two sets of side lead screw motion systems are respectively arranged on two sides of the upper end of the small wind tunnel test section mounting platform 1, each set of side lead screw motion system is composed of a side servo motor 5, a side lead screw 6, a side guide rail 4 and a side lead screw nut, the side servo motor 5 drives the side lead screw 6 to rotate, and the side lead screw 6 is fixed on the upper side of the side guide rail 4.
As shown in fig. 3, the structural schematic diagram of the vertical lead screw system is shown, the two sets of vertical lead screw motion systems are composed of a vertical servo motor 12, a vertical lead screw 11, a vertical guide rail 9, a vertical lead screw nut and a horizontal slider 8, the vertical servo motor 12 drives the vertical lead screw 11 to rotate, the vertical lead screw 11 is fixed on one side of the vertical guide rail 9, the bottom of the vertical guide rail 9 is matched with the side guide rail 4 of the side lead screw system through the horizontal slider 8, and the horizontal slider 8 is matched with the side lead screw 6 through the side lead screw nut.
As shown in fig. 4, the structural schematic diagram of the straddle lead screw system is shown, the straddle lead screw motion system is composed of a straddle servo motor 14, a straddle lead screw 15, a straddle guide rail 17, a straddle lead screw nut and a vertical slider 10, the straddle servo motor 14 drives the straddle lead screw 15 to rotate, the straddle lead screw 15 is fixed on the upper side of the straddle guide rail 17, the straddle guide rail 17 is matched with the vertical guide rail 9 of the vertical lead screw motion system through two vertical sliders 10 arranged at two ends, and the vertical slider 10 is matched with the vertical lead screw 11 through the vertical lead screw nut. Both ends of each screw are provided with infrared collision alarm generators 7.
As shown in fig. 5, the structural schematic diagram of the standard pitot tube mounting and fixing system is shown, the standard pitot tube mounting and fixing system is composed of a standard pitot tube 3, a detachable moving slider 16, a supporting and limiting frame 13 and the like, the detachable moving slider 16 is matched with a straddle screw 15 through a straddle screw nut, the standard pitot tube 3 is matched with the detachable moving slider 16 through a through hole formed in the detachable moving slider 16, two parts of the detachable moving slider 16 are connected through bolts, the supporting and limiting frame 13 is fixed on the detachable moving slider 16 through fastening screws, a horizontal output end of the standard pitot tube 3 is matched with the supporting and limiting frame 13 through a through hole formed in the supporting and limiting frame 13, and two output ends of the standard pitot tube 3 are respectively and correspondingly connected with an input end of a micro-voltage transformer. The standard pitot tube 3 can be limited to move in multiple degrees of freedom by supporting the limiting frame 13, the standard pitot tube 3 is prevented from being disturbed and disturbed under the action of flow field airflow, and the stability and the accuracy of a measuring result are guaranteed.
The automatic control system consists of an interactive panel, a laser range finder, a singlechip, a servo motor and a plurality of wires. The interactive panel is connected with a driving device of the servo motor through a lead, an output port of the laser range finder is connected with an input port of the single chip microcomputer through a lead, and an output port of the single chip microcomputer is connected with the driving device of the servo motor through a lead. The automatic control system takes a computer as an operation and interaction environment. Fig. 6 is a control flow chart of the automatic control system. The servo motors of the lead screw motion systems are connected with the single chip microcomputer, and the automatic control system performs feedback control on the servo motors of the lead screw motion systems through the single chip microcomputer by combining position information of points to be measured and position information fed back by the laser range finder integrated block 2, so that the standard pitot tube 3 moves to different measuring points to perform accurate measurement.
The use method of the mounting platform of the standard pitot tube for calibrating the flow field of the small wind tunnel experiment comprises the following steps:
1) and (3) mounting and fixing the laser range finder integrated block 2 on the head of the standard pitot tube 3, and measuring the distance between the laser range finder integrated block 2 and the head relative to the central axis of the standard pitot tube 3 so as to eliminate measurement errors.
2) Disassembling a bolt of the detachable movable sliding block 16 to separate two parts of the sliding block from each other, disassembling a fastening screw on the supporting limiting frame 13, removing the top cover, putting the standard pitot tube 3 into a through hole of the detachable movable sliding block 16, adjusting the direction of the standard pitot tube 3 to enable the standard pitot tube 3 to be opposite to the air flow direction, adjusting the height of the standard pitot tube 3 to enable the horizontal output end of the standard pitot tube 3 to just fall into the through hole of the supporting limiting frame 13, covering the top cover, screwing the screw on the top cover of the supporting limiting frame 13, combining the detachable movable sliding block 16 and screwing the bolt to fix the standard pitot tube 3. Two output ends of the standard pitot tube 3 are correspondingly connected with the input end of the micro-voltage transformer respectively.
3) The fixed standard pitot tube 3 realizes the movement in the Z direction through two sets of vertical lead screws 11, and realizes the two-dimensional movement of the standard pitot tube 3 in an X-Y plane through two sets of side lead screws 6 and a straddle lead screw 15. The laser range finder integrated block 2 mounted on the head of the standard pitot tube 3 can monitor the motion position of the standard pitot tube 3 in real time and output the position information to an automatic control system. The laser range finder integrated package 2 is externally connected with a dome shell. The position information of the point to be measured in the flow field is input into an automatic control system, the automatic control system controls the movement of each lead screw through a single chip microcomputer, the accurate measurement of different positions by a standard pitot tube 3 is realized, and the flow field data of the corresponding position is obtained through a micro-pressure transformer connected with the standard pitot tube.
By adopting the structure, the following effects can be realized:
the automatic control system and the driving motor can be used for automatically realizing the accurate positioning and control of the standard pitot tube, and compared with manual fixed-point installation and arrangement, the automatic control system reduces the operation difficulty, improves the measurement accuracy and improves the automation degree and the measurement efficiency of the system.
And secondly, for the measurement of flow field data of different measurement points, the free movement of the standard pitot tube in a three-dimensional space can be realized through each lead screw motion system, and the problem that the position of the measurement point needs to be manually adjusted every time the measurement point is changed is solved.
And the laser range finder can realize accurate positioning of the standard pitot tube, has high measurement precision and does not need manual operation.
And fourthly, the movement of a plurality of degrees of freedom of the standard pitot tube can be limited by the supporting and limiting frame, the movement is prevented from being disturbed, and the stability of the device and the accuracy of the measuring result are ensured.
Claims (5)
1. A mounting platform of a standard pitot tube for calibrating a small wind tunnel experiment flow field is characterized by comprising a small wind tunnel test section mounting platform (1), two sets of lateral lead screw motion systems, two sets of vertical lead screw motion systems, a straddle lead screw motion system, a standard pitot tube mounting and fixing system and an automatic control system;
two sets of side lead screw motion systems are respectively arranged on two sides of the upper end of the small wind tunnel test section mounting platform (1), each set of side lead screw motion system comprises a side servo motor (5), a side lead screw (6), a side guide rail (4) and a side lead screw nut, the side servo motor (5) drives the side lead screw (6) to rotate, and the side lead screw (6) is fixed on the upper side of the side guide rail (4); the side servo motors (5) of the two sets of side lead screw motion systems are connected through a motor synchronizer (18);
each set of vertical lead screw motion system comprises a vertical servo motor (12), a vertical lead screw (11), a vertical guide rail (9), a vertical lead screw nut and a horizontal sliding block (8), wherein the vertical servo motor (12) drives the vertical lead screw (11) to rotate, the vertical lead screw (11) is fixed on one side of the vertical guide rail (9), the bottom of the vertical guide rail (9) is matched with the side guide rail (4) of the side lead screw system through the horizontal sliding block (8), and the horizontal sliding block (8) is matched with the side lead screw (6) through the side lead screw nut;
the straddle lead screw motion system comprises a straddle servo motor (14), a straddle lead screw (15), a straddle guide rail (17), a straddle lead screw nut and a vertical slide block (10), wherein the straddle servo motor (14) drives the straddle lead screw (15) to rotate, the straddle lead screw (15) is fixed on the upper side of the straddle guide rail (17), the straddle guide rail (17) is matched with a vertical guide rail (9) of the vertical lead screw motion system through two vertical slide blocks (10) arranged at two ends, and the vertical slide block (10) is matched with the vertical lead screw (11) through the vertical lead screw nut;
the standard pitot tube mounting and fixing system comprises a standard pitot tube (3), a detachable movable sliding block (16) and a supporting and limiting frame (13), wherein the detachable movable sliding block (16) is matched with a straddle screw (15) through a straddle screw nut; the detachable moving sliding block (16) is divided into two parts which are connected through a bolt, a through hole is formed in the detachable moving sliding block (16), the standard pitot tube (3) is matched with the detachable moving sliding block (16) through the through hole, and a horizontal output end and a vertical output end are arranged at the upper end of the standard pitot tube (3); the supporting and limiting frame (13) is fixed on the detachable movable sliding block (16) through a fastening screw, a through hole is formed in the supporting and limiting frame (13), and the horizontal output end of the standard pitot tube (3) is matched with the supporting and limiting frame (13) through the through hole;
the automatic control system comprises an interactive panel, a laser range finder, a single chip microcomputer, a servo motor and a plurality of wires, wherein the interactive panel is connected with a driving device of the servo motor through the wires; the automatic control system takes a computer as an operation and interaction environment.
2. The mounting platform for the standard pitot tube for the calibration of the small wind tunnel experiment flow field according to claim 1, wherein two ends of each lead screw are respectively provided with an infrared collision alarm generator (7), so that on the basis of ensuring the normal work of a motion system, the interference or collision of a mechanism caused by the error of a control system is prevented, and the safety of the whole mechanism is improved.
3. The mounting platform for the standard pitot tube for the calibration of the small wind tunnel experiment flow field according to claim 1, wherein a laser range finder integrated block (2) is mounted at a measuring head of the standard pitot tube (3), and the laser range finder integrated block (2) is externally connected with a flow guide cover shell to reduce air resistance.
4. The mounting platform for the standard pitot tube for the flow field calibration of the small wind tunnel experiment as claimed in claim 1, wherein the servo motors of the lead screw motion systems are connected with a single chip microcomputer, and the automatic control system performs feedback control on the servo motors of the lead screw motion systems through the single chip microcomputer by combining the position information of the point to be measured and the position information fed back by the laser range finder integrated block (2), so that the standard pitot tube (3) moves to different measuring points for accurate measurement.
5. A use method of the installation platform of the standard pitot tube for the small wind tunnel experiment flow field calibration according to any one of claims 1 to 4, is characterized by comprising the following steps:
1) fixedly mounting the laser range finder integrated block (2) on the head of a standard pitot tube (3), and measuring the distance between the laser range finder integrated block (2) and the head relative to the central axis of the standard pitot tube (3) so as to eliminate measurement errors;
2) disassembling a bolt of the detachable movable sliding block (16) to separate the two parts of the detachable movable sliding block from each other, disassembling a fastening screw on a top cover of the supporting limiting frame (13), removing the top cover, putting the standard pitot tube (3) into a through hole of the detachable movable sliding block (16), adjusting the direction of the standard pitot tube (3) to enable the standard pitot tube to be opposite to the direction of air flow, adjusting the height of the standard pitot tube (3) to enable the horizontal output end of the standard pitot tube to just fall into the through hole of the supporting limiting frame (13), covering the top cover, screwing the fastening screw on the top cover of the supporting limiting frame (13), combining the detachable movable sliding block (16) and screwing the bolt to fix the standard pitot tube (; two output ends of the standard pitot tube (3) are respectively and correspondingly connected with the input end of the micro-voltage transformer;
3) the fixed standard pitot tube (3) can move in the Z direction through two sets of vertical lead screws (11), the two-dimensional movement of the standard pitot tube (3) in an X-Y plane is realized through two sets of side lead screws (6) and a straddle lead screw (15), and a laser range finder integrated block (2) arranged at the head of the standard pitot tube (3) can monitor the movement position of the standard pitot tube (3) in real time and output the position information to an automatic control system; the position information of the point to be measured in the flow field is input into an automatic control system, the automatic control system controls the movement of each lead screw through a single chip microcomputer, the accurate measurement of different positions by a standard pitot tube (3) is realized, and finally the flow field data of the corresponding position is obtained through a micro-pressure transformer connected with the standard pitot tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010645943.5A CN111766037A (en) | 2020-07-07 | 2020-07-07 | Mounting platform of standard pitot tube for small wind tunnel experiment flow field calibration and use method thereof |
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| CN202010645943.5A CN111766037A (en) | 2020-07-07 | 2020-07-07 | Mounting platform of standard pitot tube for small wind tunnel experiment flow field calibration and use method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112798816A (en) * | 2021-02-10 | 2021-05-14 | 北京市计量检测科学研究院(北京市能源计量监测中心) | Multi-azimuth ultrasonic wind speed measuring device |
| CN113687105A (en) * | 2021-06-24 | 2021-11-23 | 山东省产品质量检验研究院 | Mechanical arm device for detecting portable three-cup wind direction and anemometer |
| CN114486156A (en) * | 2021-12-28 | 2022-05-13 | 中国航天空气动力技术研究院 | Environmental wind tunnel flow field calibration and measurement system |
| CN115435999A (en) * | 2022-10-26 | 2022-12-06 | 中国航空工业集团公司北京长城计量测试技术研究所 | A remove test jig for test room flow field parameter test is used |
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| CN112798816A (en) * | 2021-02-10 | 2021-05-14 | 北京市计量检测科学研究院(北京市能源计量监测中心) | Multi-azimuth ultrasonic wind speed measuring device |
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| CN115435999A (en) * | 2022-10-26 | 2022-12-06 | 中国航空工业集团公司北京长城计量测试技术研究所 | A remove test jig for test room flow field parameter test is used |
| CN115435999B (en) * | 2022-10-26 | 2023-03-24 | 中国航空工业集团公司北京长城计量测试技术研究所 | A remove test jig for test room flow field parameter test is used |
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