CN110793747A - Multi freedom removes measuring mechanism - Google Patents
Multi freedom removes measuring mechanism Download PDFInfo
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- CN110793747A CN110793747A CN201910960649.0A CN201910960649A CN110793747A CN 110793747 A CN110793747 A CN 110793747A CN 201910960649 A CN201910960649 A CN 201910960649A CN 110793747 A CN110793747 A CN 110793747A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
Abstract
The invention belongs to the technical field of helicopter model rotor tests, and particularly relates to a multi-degree-of-freedom movement measuring mechanism. The multi-degree-of-freedom movement measuring mechanism consists of a base rotary table and a follow-up mechanism. The base turntable includes a linear motion platform mechanism and a rotary motion platform mechanism. The rotary motion platform mechanism is installed on the linear motion platform mechanism through the installation seat, the installation seat is movably installed on a guide rail of the linear motion platform mechanism, the follow-up mechanism is composed of two horizontal linear motion platform mechanisms perpendicular to each other and a vertical linear motion mechanism, and the horizontal linear motion platform mechanism of the follow-up mechanism is installed above the rotary motion platform mechanism. The invention can complete the independent movement function of four degrees of freedom, can realize large-scale movement measurement, effectively improves the measurement efficiency and capacity, has simple and compact structure and convenient maintenance, and increases the universality and the versatility of the mechanism because the base turntable and the follow-up mechanism can be detached and used separately.
Description
Technical Field
The invention belongs to the technical field of helicopter model rotor tests, and particularly relates to a multi-degree-of-freedom movement measuring mechanism.
Background
With the development of testing technologies, testing methods such as SPR (blade motion parameter measurement based on stereo image recognition), PIV (image particle velocity instrument) and PDPA (phase doppler particle velocity analyzer) are widely used, and these tests all include light source systems, camera systems, and even particle generators, which require high position accuracy. In addition, in the rotor noise test, because the number of the points for arranging the microphones is large, in the early preparation process of the test, a great deal of time and energy are required to install and arrange the microphones, and the test efficiency is influenced.
Aiming at the above flow field test problem, a Phase Doppler particle analyzer (PDPA for short) moving frame system capable of meeting the needs of multiple researches is developed by people in the chinese aerodynamic research and development center in 2003, and in terms of the noise test problem, a microphone test bed capable of moving in parallel relative to the wind tunnel axis is designed abroad, and the moving measurement starts from the most upstream position and stops once every 0.5 m. Although the two designs improve the test measurement efficiency, the maximum control stroke is shorter and only linear displacement motion can be realized, so that the measurement range and efficiency of the moving frame are limited, and the universality of the moving frame is reduced.
Disclosure of Invention
The purpose of the invention is as follows: the multi-degree-of-freedom movement measuring mechanism is simple in structure, convenient to operate, good in universality and capable of greatly improving the measuring range and efficiency.
The technical scheme of the invention is as follows: the utility model provides a multi freedom removes measuring mechanism, its characterized in that comprises base revolving stage and follow-up mechanism, and the base revolving stage includes linear motion platform mechanism and rotary motion platform mechanism, rotary motion platform mechanism installs on linear motion platform mechanism through the mount pad, mount pad movable mounting is on linear motion platform mechanism's guide rail, follow-up mechanism comprises two mutually perpendicular's horizontal linear motion platform mechanism and vertical linear motion mechanism, follow-up mechanism's horizontal linear motion platform mechanism installs in rotary motion platform mechanism top, realizes with base revolving stage rigid connection, constitutes and moves the measuring mechanism.
A driving lead screw is arranged between guide rails of the linear motion platform mechanism of the base turntable and used for a mounting seat of the linear motion platform mechanism, and the end part of the driving lead screw is connected with a first driving motor through a coupler.
And a central through hole is formed between the mounting seat and the rotary motion platform mechanism.
The mounting seat is connected with the rotary motion platform mechanism through bolts.
The rotary motion platform mechanism comprises a fixed disc, a rotary disc and balls, wherein the fixed disc is fixedly connected with the mounting seat, and the balls are arranged in an annular groove between the fixed disc and the rotary disc in a surrounding mode to form a rotary bearing structure.
The fixed disk comprises a bottom plate and a rotary supporting bearing outer ring, wherein the outer ring of the rotary supporting bearing outer ring is provided with ring teeth, the inner ring is provided with a first ring groove, and the bottom plate is connected with the rotary supporting bearing outer ring through bolts.
The rotary disk comprises an upper supporting plate and a rotary supporting bearing inner ring, wherein the upper supporting plate is of a frame structure and is in a disc shape, threaded holes of different specifications are distributed in the upper surface of the upper supporting plate, a second annular groove is formed in the outer ring of the rotary supporting bearing inner ring, and the upper supporting plate is connected with the rotary supporting bearing inner ring through bolts.
And a second driving motor is arranged on the rotary motion platform mechanism and is meshed with the outer ring gear of the fixed disc.
The surface of the rotating disc is provided with a plurality of mounting holes which are distributed in a circumferential manner and used for mounting the follow-up mechanism.
The vertical linear motion mechanism of the servo mechanism comprises a supporting frame, a third driving motor, an installation table and a transition rod, wherein the supporting frame is movably arranged on a guide rail of the horizontal linear motion platform mechanism, the transition rod is fixed on the installation table, the installation table is movably arranged on the vertical guide rail of the supporting frame, the third driving motor is connected with the installation table, drives the installation table and the transition rod to move, and an interface used for installing a sensor is arranged on the transition rod.
The invention has the beneficial effects that: the multi-degree-of-freedom movement measuring mechanism comprises a base rotary table and a follow-up mechanism, wherein the base rotary table comprises a linear movement platform mechanism and a rotary movement platform mechanism, and the follow-up mechanism comprises two linear movement platform mechanisms. The servo mechanism is rigidly connected to the base turntable, so that the servo mechanism is added with a linear motion function and a pivoting function on the basis of realizing the linear motion function with two degrees of freedom. Finally, the measuring sensor mounted on the follow-up mechanism can complete the independent movement function with four degrees of freedom. In the early preparation process of the test, the calibration of the position of the sensor can be facilitated, and meanwhile, the collected data can be measured in a large-range moving mode in the test process. Therefore, the measuring efficiency and the measuring capacity in the test process are improved, the moving and measuring mechanism is simple and compact in structure and convenient to maintain, the base rotary table and the follow-up mechanism can be detached and used separately, and the universality and the versatility of the mechanism are improved.
Drawings
FIG. 1 is a schematic structural diagram of a multi-degree-of-freedom movement measuring mechanism;
FIG. 2 is a schematic view of a base structure of a base turntable;
FIG. 3 is a schematic view of a turntable structure of the base;
FIG. 4 is a cross-sectional view of the base turret turntable along the long side;
figure 5 is a schematic view of the structure of the follow-up mechanism,
the device comprises a base turntable base 1, a base turntable rotary motion platform 2, a servo mechanism 3, a first guide rail 4, a mounting seat 5, a first coupler 6, a first ball screw 7, a first driving motor 8, a rotating disc 9, a second driving motor 10, a fixed disc 11, a rotating support bearing outer ring 12, a bottom plate 13, a rotating support bearing inner ring 14, an upper support plate 15, a second guide rail 16, a support frame 17, a third driving motor 18, a third coupler 19, a fourth driving motor 20, a transition rod 21, a mounting table 22, a third screw 23, a horizontal motion base 24, a third guide rail 25, a second screw 26, a first guide rail, a second guide rail 3, a first guide rail 2, a second guide rail, a first guide rail, a second guide rail 24, a first guide rail, a second guide, 27-second coupling
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the multi-degree-of-freedom movement measuring mechanism of the present invention is composed of a base turntable and a following mechanism, and is used for providing multi-degree-of-freedom movement measurement.
Referring to fig. 2, the overall size of the base turntable is as follows: 7450mm x1400mm x688mm, which is composed of a linear motion platform mechanism and a rotary motion platform mechanism. The linear motion platform mechanism of the base turntable adopts a rib plate supporting structure, the weight of the whole base is reduced, guide rails are arranged on two sides of the base, a ball screw is arranged in the middle of the base and used for driving a mounting seat of the rotary motion platform mechanism, and the end part of the driving screw is connected with a first driving motor through a coupler. The narrow end design in base both sides has the removal wheel installation ear, conveniently removes in the scene.
The base turntable can be used independently, and can realize long-distance linear motion and rotation around a shaft so as to increase the motion range of the mechanism.
The linear motion platform mechanism is provided with a first driving motor 8, and the first driving motor 8 is connected with a first ball screw 7 through a first coupler 6. The transmission route is as follows: the first driving motor 8, the first ball screw 7 and the mounting base 5.
Referring to fig. 3, the rotational motion platform mechanism includes a fixed disk 11, a rotational disk 9 and balls, wherein the fixed disk 11 is fixedly connected to the mounting seat 5, and the balls are disposed around a ring groove between the fixed disk 11 and the rotational disk 9 to form a rotational bearing structure. The rotary disk 9 has freedom of rotation around an axis while realizing the function of connecting the fixed disk 11 and the rotary disk 9.
Referring to fig. 4, the fixed disk 11 includes a rotation support bearing outer ring 12 and a bottom plate 13, wherein the outer ring of the rotation support bearing outer ring 12 is provided with ring teeth, so that the rotation support bearing has a transmission function while realizing rotation support, the inner ring of the rotation support bearing outer ring 12 is provided with a first ring groove, and the bottom plate 13 is connected with the rotation support bearing outer ring 12 by bolts.
The fixed plate 11 is fixedly connected with the mounting seat 5 through bolts.
The rotary disk 9 comprises a rotary supporting bearing inner ring 14 and an upper supporting plate 15, wherein the upper supporting plate 15 is of a frame structure, the watch is in a shape, threaded holes of different specifications are distributed in the upper surface of the watch, the watch is convenient to assemble and disassemble, the watch is suitable for installing follow-up mechanisms of various specifications and sizes, the universality of a base turntable is improved, a second annular groove is formed in the outer ring of the rotary supporting bearing inner ring 14, and the upper supporting plate 15 is connected with the rotary supporting bearing inner ring 14 through bolts. Through holes are formed in the fixed disc 11, the rotating disc 9 and the mounting seat 5, so that on one hand, weight is reduced, and on the other hand, a lead can conveniently pass through the through holes.
The rotating support bearing outer ring 12 of the fixed disc 11 is in butt joint with the rotating support bearing inner ring 14 of the rotating disc, so that the first ring groove and the second ring groove of the fixed disc and the rotating support bearing inner ring are connected into a complete closed ring groove in a parallel mode and used for ball installation to form a revolute pair.
The rotary motion platform mechanism is provided with a second driving motor 10, and the second driving motor 10 is meshed with an outer ring gear of a rotary support bearing outer ring 12 through a pinion. The transmission route is as follows: the second driving motor 10, the pinion, the fixed disc rotatably support bearing outer gear ring 12 and the rotating disc 9.
Referring to fig. 5, the vertical linear motion mechanism of the following mechanism includes a supporting frame 17, a third driving motor 18, a second guide rail 16, a mounting table 22, and a transition rod 21, the third driving motor 18 is connected to a second lead screw 26 through a second coupling 27, and the transmission route is: third drive motor 18-second lead screw 26-mounting table 22. The supporting frame 17 is movably arranged on a guide rail of the horizontal linear motion platform mechanism, and can obtain horizontal linear freedom along the horizontal linear motion platform mechanism. The horizontal linear motion platform mechanism comprises a horizontal motion base 24, a fourth driving motor 20 and a third guide rail 25, the fourth driving motor 24 is connected with a third lead screw 23 through a third coupler 19, and the transmission route is as follows: the fourth driving motor 24, the third lead screw 19 and the supporting frame 17 of the vertical linear motion mechanism.
The transition rod 21 is provided with an interface for installing a sensor, is used for installing various sensors required for detection, is fixedly installed on an installation platform, and the installation platform 22 is of a rib structure and is movably installed on a vertical guide rail of the supporting frame 17 and can move in the vertical direction along the vertical guide rail of the supporting frame 17. The third driving motor 18 is connected with the mounting table 22, and drives the mounting table 22 and the transition rod 21 to move, so as to realize height adjustment in the vertical direction.
The following mechanism can be used independently, and two-degree-of-freedom motion in a small range is realized.
The invention belongs to the technical field of helicopter model rotor tests, for example: in the early stage of a PIV or SPR test, the position of a camera needs to be calibrated, the camera can be arranged on a transition rod of the invention through a tool, and the base can be driven by a first motor to finish long-distance linear motion, so that the movable range of the camera is increased; the second motor drives the rotary table to complete rotary motion, so that the direction of the camera lens is conveniently adjusted; the servo mechanism is driven by the third motor to complete vertical linear motion, so that the motion range of the camera in the vertical direction is enlarged; and the follow-up mechanism is driven by a fourth motor to finish horizontal linear motion. The camera position can be rapidly moved and positioned by combining an electromechanical control system, and the camera position calibration efficiency, the movable range of the camera position and the degree of freedom are greatly improved.
The foregoing is merely a detailed description of the embodiments of the present invention, and some of the conventional techniques are not detailed. The scope of the present invention is not limited thereto, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a multi freedom removes measuring mechanism, its characterized in that comprises base revolving stage and follow-up mechanism, and the base revolving stage includes linear motion platform mechanism and rotary motion platform mechanism, rotary motion platform mechanism installs on linear motion platform mechanism through the mount pad, mount pad movable mounting is on linear motion platform mechanism's guide rail, follow-up mechanism comprises two mutually perpendicular's horizontal linear motion platform mechanism and vertical linear motion mechanism, follow-up mechanism's horizontal linear motion platform mechanism installs in rotary motion platform mechanism top, realizes with base revolving stage rigid connection, constitutes and moves the measuring mechanism.
2. The multi-degree-of-freedom movement measuring mechanism of claim 1, wherein a driving lead screw is arranged between the guide rails of the linear motion platform mechanism of the base turntable and used for a mounting seat of the linear motion platform mechanism, and the end part of the driving lead screw is connected with the first driving motor through a coupling.
3. The multi-degree-of-freedom movement measurement mechanism of claim 1, wherein a central through hole is provided between the mounting base and the rotary motion platform mechanism.
4. The multi-degree-of-freedom movement measurement mechanism of claim 1, wherein the mount and the rotary motion platform mechanism are bolted together.
5. The multi-degree-of-freedom movement measuring mechanism of claim 1, wherein the rotating motion platform mechanism comprises a fixed disc, a rotating disc and balls, wherein the fixed disc is fixedly connected with the mounting seat, and the balls are arranged in a ring groove between the fixed disc and the rotating disc in a surrounding manner to form a rotating bearing structure.
6. The multi-degree-of-freedom movement measuring mechanism of claim 1, wherein the fixed disk comprises a bottom plate and a rotation support bearing outer ring, wherein the rotation support bearing outer ring is provided with ring teeth, the rotation support bearing outer ring is provided with a first ring groove, and the bottom plate is connected with the rotation support bearing outer ring through bolts.
7. The multi-degree-of-freedom movement measuring mechanism according to claim 6, wherein the rotating disc comprises an upper supporting plate and a rotating supporting bearing inner ring, wherein the upper supporting plate has a frame structure and a disc shape, threaded holes with different specifications are distributed on the upper surface of the upper supporting plate, a second ring groove butted with the first ring groove is arranged on the outer ring of the rotating supporting bearing inner ring, and the upper supporting plate is connected with the rotating supporting bearing inner ring through bolts.
8. The multi-degree-of-freedom movement measurement mechanism of claim 1, wherein a second drive motor is disposed on the rotary motion platform mechanism, and the second drive motor is engaged with the outer ring gear of the fixed disk.
9. The multi-degree-of-freedom movement measurement mechanism of claim 1, wherein the surface of the rotating disk is provided with a plurality of mounting holes, and the mounting holes are distributed circumferentially for mounting the servo mechanism.
10. The multi-degree-of-freedom movement measuring mechanism according to claim 1, wherein the vertical linear motion mechanism of the servo mechanism comprises a support frame, a third driving motor, a mounting table and a transition rod, wherein the support frame is movably arranged on a guide rail of the horizontal linear motion platform mechanism, the transition rod is fixed on the mounting table, the mounting table is movably arranged on a vertical guide rail of the support frame, the third driving motor is connected with the mounting table and drives the mounting table and the transition rod to move, and an interface for mounting a sensor is arranged on the transition rod.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910960649.0A CN110793747A (en) | 2019-10-10 | 2019-10-10 | Multi freedom removes measuring mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910960649.0A CN110793747A (en) | 2019-10-10 | 2019-10-10 | Multi freedom removes measuring mechanism |
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| CN110793747A true CN110793747A (en) | 2020-02-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822225A (en) * | 2019-10-18 | 2020-02-21 | 中国直升机设计研究所 | Phase Doppler particle analyzer base rotary table |
| CN113385913A (en) * | 2021-06-25 | 2021-09-14 | 成都飞机工业（集团）有限责任公司 | Lug joint locking mechanism with multi-degree-of-freedom adjustment |
| CN113670563A (en) * | 2021-10-21 | 2021-11-19 | 中国空气动力研究与发展中心低速空气动力研究所 | Four-degree-of-freedom movement measurement device, control system and method for PIV system |
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| CN110822225A (en) * | 2019-10-18 | 2020-02-21 | 中国直升机设计研究所 | Phase Doppler particle analyzer base rotary table |
| CN113385913A (en) * | 2021-06-25 | 2021-09-14 | 成都飞机工业（集团）有限责任公司 | Lug joint locking mechanism with multi-degree-of-freedom adjustment |
| CN113670563A (en) * | 2021-10-21 | 2021-11-19 | 中国空气动力研究与发展中心低速空气动力研究所 | Four-degree-of-freedom movement measurement device, control system and method for PIV system |
| CN113670563B (en) * | 2021-10-21 | 2022-02-22 | 中国空气动力研究与发展中心低速空气动力研究所 | Four-degree-of-freedom movement measurement device, control system and method for PIV system |
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