CN116538897B - Measuring device for aircraft installation - Google Patents
Measuring device for aircraft installation Download PDFInfo
- Publication number
- CN116538897B CN116538897B CN202310754932.4A CN202310754932A CN116538897B CN 116538897 B CN116538897 B CN 116538897B CN 202310754932 A CN202310754932 A CN 202310754932A CN 116538897 B CN116538897 B CN 116538897B
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- angle
- dial
- clamping
- swivel
- fixed
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- 238000009434 installation Methods 0.000 title claims description 27
- 238000005259 measurement Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/02—Indicating direction only, e.g. by weather vane
- G01P13/025—Indicating direction only, e.g. by weather vane indicating air data, i.e. flight variables of an aircraft, e.g. angle of attack, side slip, shear, yaw
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to the technical field of measurement, in particular to measurement equipment for mounting an aircraft. Including the fixing base, the rotation is connected with the swivel in the fixing base, is fixed with angle measurement subassembly on the swivel, has seted up the perforation in the middle of the angle measurement subassembly, installs the clamping assembly who is used for fixed weathervaning on the angle measurement subassembly. According to the invention, after the wind vane penetrates through the through hole and the clamping hole, the two first rubber blocks in the clamping hole can prop against the two windward sides of the wind vane, the windward ends and the leeward ends of the wind vane can be tightly propped by the second rubber blocks and the rubber strips through deformation of the upper soft plate and the lower soft plate, the wind vane and the dial can be ensured to synchronously rotate, and the accuracy of calibrating the wind vane angle of the angle-of-attack sensor is ensured.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to measurement equipment for mounting an aircraft.
Background
The angle of attack sensor is the atmospheric data system corollary product, installs in aircraft fuselage front body both sides, and angle of attack sensor's vane is wedge vane, rotates along with the change of air current direction to the pitch angle of aircraft fuselage relative air current is measured. The windvane angle of the attack angle sensor can be displayed on an instrument of the aircraft, and in order to accurately measure the flight angle of the aircraft, the windvane angle of the attack angle sensor needs to be accurately calibrated.
An angle measuring instrument described in CN211601915U in the prior art is also an angle measuring instrument for an weathervane angle sensor, but the weathervane is a straight rod weathervane, and the weathervane is vertically connected with an weathervane shaft through a straight rod and is generally installed on a machine head. The device is different from a straight rod type wind vane, the wedge-shaped wind vane and the rotating shaft are connected through curved surfaces at a certain angle respectively, and the prior art cannot be used for measuring the wedge-shaped wind vane on two sides of the machine body due to the structural difference of the wind vane.
Disclosure of Invention
The invention aims to solve the technical problem that the measuring equipment can conveniently and accurately calibrate the windmark angle of the attack angle sensor, can conveniently clamp the windmark in the process of accurately calibrating the windmark angle of the attack angle sensor, and can ensure the accuracy of calibrating the windmark angle of the attack angle sensor.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
the measuring equipment for the installation of the aircraft comprises a fixed seat which can be positioned relative to a flange plate of an attack angle sensor, a swivel is rotationally connected to the fixed seat, the swivel is concentric with the fixed seat, an angle measuring assembly is fixed on the swivel, a through hole is formed in the middle of the angle measuring assembly, and a clamping assembly for fixing a wind vane is arranged on the angle measuring assembly;
the clamping assembly comprises two soft boards which are respectively positioned on the upper side and the lower side of the angle measurement assembly, connecting shafts are respectively fixed at two ends of the soft boards, the angle measurement assembly is provided with sliding blocks in a sliding mode, two ends of each connecting shaft are respectively connected with one sliding block in a rotating mode, two driving devices are arranged on the angle measurement assembly and are respectively positioned on two perforated sides, the driving devices can drive the middle parts of the soft boards positioned on the upper side and the lower side of the angle measurement assembly to be mutually far away, clamping holes are formed in the soft boards and are isosceles triangles, sharp corners of the clamping holes face the axle center of a swivel, first rubber blocks are respectively fixed at the middle parts of inclined hole walls of the clamping holes, second rubber blocks are respectively fixed in sharp corners of the clamping holes, and rubber strips are respectively fixed on hole walls of the clamping holes far away from the swivel.
Specifically, the angle measurement assembly includes the calibrated scale with swivel fixed connection, and the calibrated scale is fan-shaped, has the scale on the calibrated scale, and the perforation is offered and is used for the vane to pass on the calibrated scale, and the calibrated scale below is provided with the support frame, support frame and fixing base fixed connection are fixed with the vernier that is used for carrying out the scale discernment with the calibrated scale combination on the support frame.
Specifically, the calibrated scale is provided with a sliding groove corresponding to the sliding block, the sliding block penetrates through the sliding groove, a clamping groove is formed in the sliding groove, a clamping block is fixed on the sliding block, and the clamping block is matched with the clamping groove in a sliding clamping manner.
Specifically, drive arrangement includes vertical installation shell, and the installation shell runs through the calibrated scale, and installation shell and calibrated scale fixed connection, installation shell internal rotation are connected with vertical positive and negative lead screw, and the installation shell upper end is fixed with the motor, and the output shaft and the positive and negative lead screw fixed connection of motor, soft board middle part both sides all are provided with the lug, and lug slip joint is in the installation shell, the lug of the soft board of top and the screw thread part threaded connection of positive and negative lead screw top, the lug of the soft board of below and the screw thread part threaded connection of positive and negative lead screw below.
Specifically, the calibrated scale lower extreme is fixed with rather than concentric arc rack, rotates on the support frame and is connected with the pivot, concentric fixedly connected with gear in the pivot, gear and arc rack meshing, concentric fixed with the knob in the pivot.
Specifically, the outside of swivel is fixed with the snap ring, and the swivel passes through the snap ring and rotates with the fixing base to be connected, has offered a plurality of mounting holes on the fixing base, and the screw runs through behind the mounting hole with the ring flange threaded connection of angle of attack sensor, makes angle measurement subassembly's rotation center and angle of attack sensor's center keep unanimous.
Specifically, the dial is provided with a level gauge.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, after the wind vane penetrates through the through hole and the clamping hole, the two first rubber blocks in the clamping hole can prop against the two windward sides of the wind vane, the windward ends and the leeward ends of the wind vane can be tightly propped by the second rubber blocks and the rubber strips through deformation of the upper soft plate and the lower soft plate, the wind vane and the dial can be ensured to synchronously rotate, and the accuracy of calibrating the wind vane angle of the angle-of-attack sensor is ensured.
2. Through turning the knob, the deflection angle of the sensor weathervane relative to the mechanical zero position can be read through the cooperation of the vernier and the scale on the dial, the problem of angle of attack sensor weathervane angle calibration is solved, and the device is simple in structure and low in cost.
Drawings
Fig. 1 is a schematic view of a weathervane of an angle of attack sensor.
FIG. 2 is a schematic diagram of the present invention.
Fig. 3 is an enlarged view of area a in fig. 2.
Fig. 4 is a schematic view of the cooperation of the fixing base and the supporting frame.
Fig. 5 is a schematic view of the cooperation of a gear with an arcuate rack.
Fig. 6 is a schematic view of a dial.
Fig. 7 is an enlarged view of region B in fig. 6.
Fig. 8 is a schematic view of a flexible board.
FIG. 9 is a schematic view of a slider.
The names of the parts in the drawings are as follows:
1. a fixing seat; 2. a mounting hole; 3. a swivel; 4. a clasp; 5. a dial; 6. an angle of attack sensor; 7. a chute; 8. a level gauge; 9. a mounting shell; 10. a positive and negative screw rod; 11. a motor; 12. a slide block; 13. a clamping block; 14. perforating; 15. a flexible board; 16. a connecting shaft; 17. a bump; 18. a clamping hole; 19. a rubber strip; 20. a first rubber block; 21. a second rubber block; 22. a gear; 23. a knob; 24. a rotating shaft; 25. a cursor; 26. an arc-shaped rack; 27. a support frame; 28. and (5) a wind vane.
Detailed Description
Calibration measurements of the angle of attack sensor 6 for the weathervane 28 angle are required after installation of the angle of attack sensor 6 on the aircraft. The structure of the angle of attack sensor 6 is shown in fig. 1.
As shown in fig. 2, the measuring device for aircraft installation comprises a holder 1 which can be positioned opposite the flange of an angle of attack sensor 6. The fixing seat 1 is provided with a plurality of mounting holes 2, and screws penetrate through the mounting holes 2 and are in threaded connection with the flange plate of the attack angle sensor 6, so that the rotation center of the angle measuring assembly is consistent with the center of the attack angle sensor 6.
As shown in fig. 2, 4 and 6, a swivel 3 is rotatably connected to the fixing base 1, and the swivel 3 is concentric with the fixing base 1. And a clamping ring 4 is fixed on the outer side of the swivel 3. The inner wall of fixing base 1 is equipped with the draw-in groove, and snap ring 4 cooperatees with the draw-in groove. The swivel 3 is rotationally connected with the fixed seat 1 through a snap ring 4.
An angle measuring component is fixed on the swivel 3. The angle measuring assembly comprises a dial 5 fixedly connected with the swivel 3, the dial 5 is sector-shaped, and scales are arranged on the dial 5. Perforations 14 are provided in the dial 5 for the passage of the weathervaning 28. A supporting frame 27 is arranged below the dial 5, the supporting frame 27 is fixedly connected with the fixed seat 1, and a vernier 25 used for carrying out scale recognition in combination with the dial 5 is fixed on the supporting frame 27. The scale value range on the dial 5 is-55 degrees to 55 degrees, and the scale division value is 1 degree.
As shown in fig. 2, the dial 5 is provided with a level 8. After the fixing seat 1 is fixedly connected with the flange plate of the attack angle sensor 6 through bolts, the levelness of the measuring equipment can be detected through the level meter 8.
As shown in fig. 2, 4 and 9, a clamping assembly for fixing the weathervaning 28 is mounted on the dial 5. The symmetry centers of the angle measuring component and the clamping component are consistent.
The clamping assembly includes flexible plates 15 on both upper and lower sides of the dial 5. Connecting shafts 16 are fixed at both ends of the flexible board 15. The dial 5 is provided with a chute 7, and a slide block 12 is arranged in the chute 7 in a sliding way. A clamping groove is arranged in the chute 7. A clamping block 13 matched with the clamping groove is fixed on the side edge of the sliding block 12. The clamping block 13 is in sliding clamping fit with the clamping groove. The two ends of the slide block 12 are respectively provided with a through groove. The sliding block 12 penetrates through the sliding groove 7, and through grooves at two ends of the sliding block 12 are respectively positioned at two sides of the dial 5. The through grooves on the slide block 12 at two sides of the dial 5 are respectively in rotary fit with the end parts of the corresponding connecting shafts 16. The number of the sliding blocks 12 is four, and the sliding blocks are respectively arranged corresponding to the end parts of the connecting shafts 16 at the two ends of the soft board 15. The connecting shaft 16 is rotatably connected to the slider 12.
The dials 5 on both sides of the perforation 14 are provided with driving means. The driving device can drive the middle parts of the soft boards 15 on the upper side and the lower side to be far away from each other.
As shown in fig. 2, 6, 7 and 9, the driving device comprises a vertical mounting shell 9, the mounting shell 9 penetrates through the dial 5, and the mounting shell 9 is fixedly connected with the dial 5. The installation shell 9 is rotationally connected with a forward and reverse screw rod 10 which is arranged in the vertical direction, a motor 11 is fixed at the upper end of the installation shell 9, and an output shaft of the motor 11 is fixedly connected with the forward and reverse screw rod 10. The two sides of the middle part of the soft board 15 are provided with protruding blocks 17, and the protruding blocks 17 are in sliding clamping connection in the installation shell 9. The protruding block 17 of the upper soft plate 15 is in threaded connection with the threaded portion above the forward and reverse screw 10, and the protruding block 17 of the lower soft plate 15 is in threaded connection with the threaded portion below the forward and reverse screw 10.
As shown in fig. 2 and 8, the flexible board 15 is provided with a clamping hole 18, the clamping hole 18 is in an isosceles triangle shape, the sharp angle of the clamping hole 18 faces the axis of the swivel 3, the middle part of the inclined hole wall of the clamping hole 18 is fixed with a first rubber block 20, the sharp angle of the clamping hole 18 is internally fixed with a second rubber block 21, and the hole wall of the clamping hole 18 far away from the swivel 3 is fixed with a rubber strip 19.
As shown in fig. 2, 3 and 5, an arc-shaped rack 26 concentric with the dial 5 is fixed at the lower end of the dial 5, a rotating shaft 24 is rotatably connected to a supporting frame 27, a gear 22 is concentrically and fixedly connected to the rotating shaft 24, the gear 22 is meshed with the arc-shaped rack 26, and a knob 23 is concentrically fixed to the rotating shaft 24. When the knob 23 is rotated, the dial 5 and the rotary ring 3 rotate around the axle center of the rotary ring 3 through the rotating shaft 24, the gear 22 and the arc-shaped rack 26, and when the zero scale line of the dial 5 is aligned with the zero scale line of the vernier 25, the mechanical zero position of the vane 28 of the attack angle sensor 6 is obtained.
When the angle of the wind vane 28 of the attack angle sensor 6 is measured, the wind vane 28 penetrates through the clamping hole 18 and the through hole 14, then the fixing seat 1 is fixedly connected with the flange plate of the attack angle sensor 6 through bolts, and after the wind vane 28 penetrates through the clamping hole 18, the two first rubber blocks 20 in the clamping hole 18 can move in the vertical direction to continuously prop against the two windward sides of the wind vane 28.
Then, the motor 11 is started, the motor 11 drives the positive and negative screw 10 to rotate, in the process of rotating the positive and negative screw 10, the lug 17 above drives the middle part of the soft board 15 above to be upwards protruded, the lug 17 below drives the middle part of the soft board 15 below to be downwards protruded, in the process of protrusion of the middle part of the soft board 15, the connecting shafts 16 and the sliding blocks 12 at two ends of the soft board 15 are mutually close to each other, and further the second rubber block 21 and the rubber strip 19 in the clamping hole 18 clamp the windward end and the leeward end of the wind vane 28, so that the synchronous rotation of the dial 5 and the wind vane 28 is ensured in the process of rotating the dial 5. Thereby improving the accuracy of the angle calibration measurement of the weathervaning 28.
During the clamping process, the first rubber block 20 gradually rises due to the bulge of the soft board 15, so that a drop occurs between the horizontal height of the first rubber block 20 and the horizontal height of the second rubber block 21 and the rubber strip 19. The wind vane 28 is clamped in the opposite directions of the same horizontal plane of the second rubber block 21 and the rubber strip 19, and meanwhile, the wind vane 28 is also abutted against the first rubber block 20 at different heights, so that the stress positions of the wind vane 28 are increased at multiple positions in a three-dimensional space, the whole wind vane 28 is stressed more uniformly, and inaccurate measurement caused by three-dimensional torsion of the wind vane 28 in the clamping process is prevented.
When the knob 23 is rotated, the dial 5, the swivel 3 and the vane 28 rotate around the axis of the swivel 3 through the rotating shaft 24, the gear 22 and the arc-shaped rack 26, and the deflection angle of the vane 28 on the attack angle sensor 6 relative to the mechanical zero position of the vane is read through the cooperation of the cursor 25 and the scales on the dial 5. The angle measurement of the windvane 28 on the attack angle sensor 6 can be realized within the measurement range of-55 degrees, and the problem of calibrating the angle of the windvane 28 with the wedge shape of the attack angle sensor 6 is effectively solved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The measuring equipment for the installation of the aircraft comprises a fixed seat (1) which can be positioned relative to a flange plate of an attack angle sensor (6), wherein a swivel (3) is rotationally connected to the fixed seat (1), and the swivel (3) is concentric with the fixed seat (1), and the measuring equipment is characterized in that an angle measuring assembly is fixed on the swivel (3), a through hole (14) is formed in the middle of the angle measuring assembly, and a clamping assembly for fixing a wind vane (28) is arranged on the angle measuring assembly;
the clamping assembly comprises two soft boards (15) which are respectively positioned on the upper side and the lower side of the angle measurement assembly, connecting shafts (16) are respectively fixed at two ends of the soft boards (15), sliding blocks (12) are arranged on the angle measurement assembly in a sliding mode, two sliding blocks (12) are respectively connected at two ends of each connecting shaft (16) in a rotating mode, two driving devices are arranged on the angle measurement assembly and are respectively positioned on two sides of a perforation (14), the driving devices can drive the middle parts of the soft boards (15) positioned on the upper side and the lower side of the angle measurement assembly to be away from each other, clamping holes (18) are formed in the soft boards (15), the clamping holes (18) are isosceles triangles, sharp corners of the clamping holes (18) face towards the axle center of the swivel (3), first rubber blocks (20) are respectively fixed in the middle parts of inclined hole walls of the clamping holes (18), second rubber blocks (21) are respectively fixed in the sharp corners of the clamping holes (18), and rubber strips (19) are respectively fixed on the hole walls of the clamping holes (18) which are far away from the swivel (3).
2. The measuring device for aircraft installation according to claim 1, characterized in that the angle measuring assembly comprises a dial (5) fixedly connected with the swivel (3), the dial (5) is sector-shaped, the dial (5) is provided with scales, the through holes (14) are formed in the dial (5) and used for allowing the wind vane (28) to pass through, a supporting frame (27) is arranged below the dial (5), the supporting frame (27) is fixedly connected with the fixed seat (1), and a vernier (25) used for carrying out scale identification in combination with the dial (5) is fixed on the supporting frame (27).
3. The measuring device for aircraft installation according to claim 2, wherein the scale (5) is provided with a chute (7) corresponding to the slide block (12), the slide block (12) penetrates through the chute (7), the chute (7) is provided with a clamping groove, the slide block (12) is fixedly provided with a clamping block (13), and the clamping block (13) is in sliding clamping fit with the clamping groove.
4. The measuring device for aircraft installation according to claim 2, wherein the driving device comprises a vertical installation shell (9), the installation shell (9) penetrates through the dial (5), the installation shell (9) is fixedly connected with the dial (5), the installation shell (9) is rotationally connected with a vertical positive and negative screw (10), the upper end of the installation shell (9) is fixedly connected with a motor (11), an output shaft of the motor (11) is fixedly connected with the positive and negative screw (10), two sides of the middle part of the soft board (15) are respectively provided with a lug (17), the lugs (17) are in sliding clamping connection in the installation shell (9), the lugs (17) of the soft board (15) above are in threaded connection with threaded parts above the positive and negative screw (10), and the lugs (17) of the soft board (15) below are in threaded connection with threaded parts below the positive and negative screw (10).
5. The measuring device for aircraft installation according to claim 2, wherein the lower end of the dial (5) is fixedly provided with an arc-shaped rack (26) concentric with the dial, the support frame (27) is rotatably connected with a rotating shaft (24), the rotating shaft (24) is concentrically fixedly connected with a gear (22), the gear (22) is meshed with the arc-shaped rack (26), and the rotating shaft (24) is concentrically fixedly provided with a knob (23).
6. The measuring device for aircraft installation according to claim 1, wherein a snap ring (4) is fixed on the outer side of the swivel (3), the swivel (3) is rotationally connected with the fixing seat (1) through the snap ring (4), a plurality of mounting holes (2) are formed in the fixing seat (1), and screws penetrate through the mounting holes (2) and are in threaded connection with a flange plate of the angle of attack sensor (6), so that the rotation center of the angle measuring assembly is kept consistent with the center of the angle of attack sensor (6).
7. Measuring device for aircraft installation according to claim 2, characterized in that the dial (5) is fitted with a level meter (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310754932.4A CN116538897B (en) | 2023-06-26 | 2023-06-26 | Measuring device for aircraft installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310754932.4A CN116538897B (en) | 2023-06-26 | 2023-06-26 | Measuring device for aircraft installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116538897A CN116538897A (en) | 2023-08-04 |
| CN116538897B true CN116538897B (en) | 2023-08-29 |
Family
ID=87445584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310754932.4A Active CN116538897B (en) | 2023-06-26 | 2023-06-26 | Measuring device for aircraft installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116538897B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH640936A5 (en) * | 1981-04-03 | 1984-01-31 | Far Fab Assortiments Reunies | Angular displacement sensor |
| CN209878075U (en) * | 2019-07-01 | 2019-12-31 | 广东高丰建设工程有限公司 | Farmland hydraulic engineering measuring device |
| CN211601915U (en) * | 2020-04-24 | 2020-09-29 | 四川探索者航空科技有限公司 | Angle measuring instrument |
| CN212473966U (en) * | 2020-05-18 | 2021-02-05 | 中国商用飞机有限责任公司 | Attack angle sensor device and attack angle sensor control system |
| CN212565158U (en) * | 2020-05-12 | 2021-02-19 | 河北大唐国际丰润热电有限责任公司 | Adjustable computer display supporting device |
| CN112665491A (en) * | 2020-12-16 | 2021-04-16 | 武汉航空仪表有限责任公司 | Wind vane angle measuring device and method for attack angle sensor |
| CN113016561A (en) * | 2021-01-06 | 2021-06-25 | 海南大学 | Automatic clamping and centering tapping machine for different-direction crank |
| CN216265534U (en) * | 2021-10-28 | 2022-04-12 | 东莞市黄江大顺电子有限公司 | Positioning jig for testing circuit soft board |
| CN216791843U (en) * | 2022-02-11 | 2022-06-21 | 于圣杰 | Impact clamp capable of changing any angle |
-
2023
- 2023-06-26 CN CN202310754932.4A patent/CN116538897B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH640936A5 (en) * | 1981-04-03 | 1984-01-31 | Far Fab Assortiments Reunies | Angular displacement sensor |
| CN209878075U (en) * | 2019-07-01 | 2019-12-31 | 广东高丰建设工程有限公司 | Farmland hydraulic engineering measuring device |
| CN211601915U (en) * | 2020-04-24 | 2020-09-29 | 四川探索者航空科技有限公司 | Angle measuring instrument |
| CN212565158U (en) * | 2020-05-12 | 2021-02-19 | 河北大唐国际丰润热电有限责任公司 | Adjustable computer display supporting device |
| CN212473966U (en) * | 2020-05-18 | 2021-02-05 | 中国商用飞机有限责任公司 | Attack angle sensor device and attack angle sensor control system |
| CN112665491A (en) * | 2020-12-16 | 2021-04-16 | 武汉航空仪表有限责任公司 | Wind vane angle measuring device and method for attack angle sensor |
| CN113016561A (en) * | 2021-01-06 | 2021-06-25 | 海南大学 | Automatic clamping and centering tapping machine for different-direction crank |
| CN216265534U (en) * | 2021-10-28 | 2022-04-12 | 东莞市黄江大顺电子有限公司 | Positioning jig for testing circuit soft board |
| CN216791843U (en) * | 2022-02-11 | 2022-06-21 | 于圣杰 | Impact clamp capable of changing any angle |
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| Publication number | Publication date |
|---|---|
| CN116538897A (en) | 2023-08-04 |
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