CN107764536A - Propeller test device - Google Patents
Propeller test device Download PDFInfo
- Publication number
- CN107764536A CN107764536A CN201711085818.8A CN201711085818A CN107764536A CN 107764536 A CN107764536 A CN 107764536A CN 201711085818 A CN201711085818 A CN 201711085818A CN 107764536 A CN107764536 A CN 107764536A
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- propeller
- pulling force
- sensor
- mounting bracket
- test
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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
- G01M13/00—Testing of machine parts
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- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The present invention relates to propeller field,More specifically,It is related to a kind of propeller test device,Including mounting bracket and it is arranged on the pulling force sensor on mounting bracket for measuring pulling force parameter,It is used for the shock sensor for measuring vibrations parameter on motor base for measuring the torsion torque sensor of torsion parameter and passing and be fixed on from one end of mounting bracket,Described pulling force sensor,The parameter of measurement is transferred to by torsion torque sensor and shock sensor via electric wire respectively to be arranged on the display screen of mounting bracket side,So,Pulling force characteristic when on same test machine propeller motion can be tested simultaneously,Torsion performance and vibrations performance,The test machine for being merely able to test one of performance compared to other is compared,Substantially increase testing efficiency,Test machine mechanism provided by the invention is simple simultaneously,Manufacturing cost and volume are less than the totle drilling cost and cumulative volume for three kinds of simple function test machines for reaching same test purpose,So that propeller test device has more market competition advantage.
Description
Technical field：
The present invention relates to propeller field, more particularly, to a kind of propeller test device.
Background technology：
Propeller refers to rotate in air or water by blade, and the rotative power of drive device is converted into the dress of propulsive force
Put, it is widely used on the propeller of aircraft, steamer, aircraft, aerostatics etc..
Although aero propulsion technology early has been enter into jet age, play an important role and produce in aviation development history
Pneumatic component-propeller of pulling force does not exit this field.Current secondary-line-aircrafts most in the world, general aviation aircraft
The nearly all civil aircraft developed with China, especially most unmanned planes in China are still using propeller as stress part.
It is the part most reused in Design of Propeller and application that the performance of propeller, which calculates, and in the design and property for carrying out new propeller
, it is necessary to carry out proof theory design result by substantial amounts of experiment when determining.The most handy full chi of the aerodynamic experiment of propeller
Very little oar is carried out in practical flight scene.It thus can directly measure the performance data under live flying state.But this is not existing
It is real and unnecessary.Because aerial field test is limited by security, economy and measuring accuracy etc..Will toward contact
Ask and just predict its performance before full-scale oar is produced, also can not just carry out actual loading test certainly.Domestic and international most spiral shells at present
Rotation oar exploitation Journal of Sex Research is all first carried out with scaled model in wind-tunnel, has not only been facilitated but also economical.Therefore, a kind of new integrative test
Device carries out comprehensive performance parameter test to propeller and is necessary, and it can not only be many to propeller
Kinematic parameter is tested, and can improve the efficiency of test, reduces cost.
The content of the invention：
The technical problems to be solved by the invention are that providing one kind can survey to propeller motion parameters in all directions
The test machine of amount.
The technical problems to be solved by the invention are realized using following technical scheme：A kind of propeller test device, including
Propeller and the motor that propeller rear end provides rotary power for propeller is arranged on, described motor is fixed on motor base
On, in addition to mounting bracket and be arranged on mounting bracket be used for measure the pulling force sensor of pulling force parameter, for measuring torsion parameter
Torsion torque sensor and passed from one end of mounting bracket and be fixed on motor base be used for measure vibrations parameter vibrations pass
The parameter of measurement is transferred to sets respectively by sensor, described pulling force sensor, torsion torque sensor and shock sensor via electric wire
Put on the display screen of mounting bracket side.
Preferably, described pulling force sensor includes the pulling force sensor seat being fixed on mounting bracket, and described pulling force passes
Sensor seat is rectangular configuration and pulling force sensor seat is provided with and is used to fix the mounting hole of itself and connection pulling force sensor sheet
The through hole of body, described pulling force sensor body include force-sensing parts and are symmetricly set on the pulling force transmission at force-sensing parts both ends
Portion, the pulling force transfer part of described force-sensing parts side connect with through hole, the pulling force transfer part of force-sensing parts opposite side and fixation
Stayed mast connection on tension plate, described tension plate are fixed on torsion torque sensor seat.
Preferably, described side of the torsion torque sensor seat away from tension plate is provided with torsion torque sensor, and described torsion passes
The installation chassis that sensor includes being used to be fixed on torsion torque sensor seat and the cylinder for being arranged on installation chassis side, it is described
Cylinder top end is extended with the square protruding for transmitting moment of torsion, the groove that described square protruding insertion torque arm one end is provided with
Interior, described torque arm is horizontally disposed and the torque arm other end stretches out mounting bracket and connected with one end of shock sensor.
Preferably, described shock sensor include be fixed on second installation chassis of the motor base away from motor side and
It is used for the vibrations head for testing vibrations parameter positioned at the second installation chassis side, described vibrations head and torque arm sense away from torsion
One end connection of device.
Preferably, the support of described mounting bracket including groove-like and the slideway being arranged on support, described support by
Riser and transverse slat perpendicular to riser enclose to be formed, and support is two and the notch of support is oppositely arranged, and described transverse slat is remote
The side on ground is provided with slideway, and described slideway restocking is provided with slide mass, and described slide mass is total to perpendicular to support and slide mass
Four, slide mass is evenly arranged in the slideway of the upper side and lower side, and described slide mass includes connecting plate and is arranged on connecting plate
The sliding block at both ends, described sliding block are fastened on slideway, are slided physical efficiency and are slided on slideway.
Preferably, described support is provided with the reinforcing plate for being used for improving support bonding strength away from propeller one end, described
Pulling force sensor seat lower end wear fixed via bolt or screw and be scheduled in reinforcing plate side wall, described torsion torque sensor seat is fixed
On the slide mass away from propeller side, it is remote that the upper and lower ends of torsion torque sensor seat via bolt or screw are fixed on slide mass
It is described from the connecting plate side wall of propeller side, being provided with bearing block between the connecting plate of the slide mass of upper and lower homonymy
Torque arm stretches out from bearing block.
Preferably, it is provided with self-aligning ball bearing in described bearing block.
Preferably, described propeller test machine is arranged in wind tunnel device, and described wind tunnel device includes casing and set
Put and be used for the wind-tunnel for testing propeller performance in casing, two are horizontally disposed with described wind-tunnel and is used to support fixing and mounting bracket
Support beam, described casing side, which is provided with, to be used to reflect the display screen of test parameter, is provided with and is used on the upside of described casing
The transformer cover of transformer is installed.
Preferably, described wall box, which is provided with, is used to controlling the knob of propeller rotary speed, described knob and
Display screen is structure as a whole.
Compared with prior art, beneficial effects of the present invention are：
1st, the pulling force characteristic when on same test machine propeller motion can be tested simultaneously, torsion performance and vibratility
Can, the test machine for being merely able to test one of performance compared to other is compared, and substantially increases testing efficiency, while the present invention carries
The test machine mechanism of confession is simple, and manufacturing cost is less than the totle drilling cost for three kinds of simple function test machines for reaching same test purpose.
2nd, propeller test device provided by the invention compares the test machine of other single test functions currently on the market,
Under the premise of identical test purpose is reached, the volume of propeller test device provided by the invention is less than three kinds of simple functions and surveyed
Total volume of test-run a machine, reduce the installing space of equipment so that propeller test device of the invention has more market competition
Advantage.
3rd, compact-sized, simple propeller test device is more convenient for promoting.
Brief description of the drawings：
Fig. 1 is schematic structural view of the invention；
Fig. 2 is front view of the present invention；
Fig. 3 is left view of the present invention；
Fig. 4 is top view of the present invention；
Fig. 5 is B-B positions sectional view in Fig. 3；
Fig. 6 is A-A positions sectional view in Fig. 4；
Fig. 7 is wind tunnel device structural representation of the present invention；
Fig. 8 is wind tunnel device front view of the present invention；
In figure：1- propellers；2- motors；3- motor bases；4- pulling force sensors；41- pulling force sensor seats；411- leads to
Hole；42- pulling force sensor bodies；43- tension plates；431- stayed masts；5- torsion torque sensors；51- torsion torque sensor seats；52- pacifies
Cartridge chassis；521- cylinders；522- square protrudings；6- shock sensors；The installation chassis of 61- second；62- shakes head；7- is installed
Frame；71- supports；711- risers；712- transverse slats；72- slideways；73- slide masses；731- connecting plates；732- sliding blocks；74- reinforcing plates；
8- wind tunnel devices；81- casings；82- wind-tunnel；83- support beams；84- display screens；85- transformer covers；86- knobs.
Embodiment：
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is furture elucidated.
Embodiment one：
As depicted in figs. 1 and 2, a kind of propeller test device, including propeller 1 and to be arranged on the rear end of propeller 1 be spiral shell
The motor 2 that oar 1 provides rotary power is revolved, motor 2 is fixed on motor base 3, in addition to mounting bracket 7 and is arranged on mounting bracket 7
It is upper to be used to measuring the pulling force sensor 4 of pulling force parameter, the torsion torque sensor 5 for measuring torsion parameter and from mounting bracket 7
One end, which passes and is fixed on, is used for the shock sensor 6 for measuring vibrations parameter on motor base 3, pulling force sensor 4, torsion sensing
The parameter of measurement is transferred to by device 5 and shock sensor 6 via electric wire respectively to be arranged on the display screen 84 of the side of mounting bracket 7.
In the prior art, the equipment that propeller test machine is generally simple function, in the kinematic parameter progress to propeller
During test, a kind of parameter therein can only typically be tested, when experimenter's kinematic parameter different to propeller is surveyed
, it is necessary to which the equipment for buying difference in functionality is tested during examination, so greatly waste financial resources, improve experimental cost, at the same it is a variety of
Bigger experimental site, propeller test device provided by the invention, in same test machine are also required to when equipment is tested
On pulling force characteristic, torsion performance and vibrations performance when can test propeller motion simultaneously, be merely able to test it compared to other
In the test machine of a performance compare, substantially increase testing efficiency, while test machine mechanism provided by the invention is simple, manufacture
Cost is less than the totle drilling cost for three kinds of simple function test machines for reaching same test purpose；Propeller test dress provided by the invention
The test machine compared to other single test functions currently on the market is put, under the premise of identical test purpose is reached, the present invention
The volume of the propeller test device of offer is less than total volume of three kinds of simple function test machines, and the installation for reducing equipment is empty
Between so that propeller test device of the invention has more market competition advantage；Compact-sized, simple propeller test device
It is more convenient for promoting.
Operation principle：Propeller test device provided by the invention, by transformer to voltage processing, then connect motor
2, propeller test device is provided with three kinds of sensors, respectively pulling force sensor 4, torsion torque sensor 5 and shock sensor 6, when
Motor 2 produces pulling force, torsional forces and vibrations respectively when driving 1 high-speed rotation of propeller；Produced by propeller 1 in high-speed rotation
Raw pulling force, pulls stayed mast 431, and driving tension plate 43, pulling force sensor 4 passes through circuit so as to conduct on pulling force sensor 4
It is shown on display screen 84, rotates caused pulling force parameter so as to obtain propeller 1；When propeller 1 rotates, torque arm
53 by propeller 1 rotate caused by the groove that is provided with by it of moment of torsion pass to the square protruding 522 that is embedded into groove, lead to
Cross torsion torque sensor 5 to be delivered on display screen 84 via circuit, so as to directly obtain torsion ginseng when propeller 1 moves
Number；Shock sensor 6 is directly installed on the low rear of seat 3 of motor, produces vibrations when motor 2 drives propeller 1 to rotate, can survey
Most accurate vibrations parameter is measured, and has display screen to embody.
As shown in Figure 6 and Figure 7, pulling force sensor 4 includes the pulling force sensor seat 41 being fixed on mounting bracket 7, and pulling force passes
Sensor seat 41 is rectangular configuration and pulling force sensor seat 41 is provided with and is used to fix the mounting hole of itself and connection pull sensing
The through hole 411 of device body 42, pulling force sensor body 42 include force-sensing parts and are symmetricly set on the pulling force at force-sensing parts both ends
Transfer part, the pulling force transfer part and through hole 411 of force-sensing parts side connect, the pulling force transfer part of force-sensing parts opposite side and fixation
Stayed mast 431 on tension plate 43 is connected, and tension plate 43 is fixed on torsion torque sensor seat 41, in this way, being existed by propeller 1
Pulling force is produced in high-speed rotation, pulls stayed mast 431, drives tension plate 43 so as to conduct on pulling force sensor 4, pull sensing
Device 4 is shown on display screen 84 by circuit, rotates caused pulling force parameter so as to obtain propeller 1.
As shown in Fig. 1, Fig. 6 and Fig. 7, side of the torsion torque sensor seat 51 away from tension plate 43 is provided with torsion torque sensor 5, turns round
The installation chassis 52 that force snesor 5 includes being used to be fixed on torsion torque sensor seat 51 and the circle for being arranged on the side of installation chassis 52
Cylinder 521, the top of cylinder 521 are extended with the square protruding 522 for transmitting moment of torsion, and square protruding 522 is embedded in torque arm 53
In the groove that one end is provided with, torque arm 53 is horizontally disposed and the other end of torque arm 53 stretches out mounting bracket 7 and and shock sensor 6
One end connects, in this way, when propeller 1 rotates, torque arm 53 by propeller 1 rotate caused by the groove that is provided with by it of moment of torsion
The square protruding 522 being embedded into groove is passed to, is delivered to by torsion torque sensor 5 via circuit on display screen 84, so as to
Torsion parameter when propeller 1 moves can be directly obtained
As shown in Fig. 2, Fig. 6, shock sensor 6 includes being fixed on second installation bottom of the motor base 3 away from the side of motor 2
Disk 61 and the vibrations first 62 for being used for test vibrations parameter positioned at the side of the second installation chassis 61, vibrations first 62 and torque arm 53 are remote
One end connection of torsion torque sensor 5, in this way, shock sensor 6 is directly installed on the low rear of seat 3 of motor, spiral is driven in motor 2
Vibrations are produced when oar 1 rotates, accurately vibrations parameter, and being embodied by display screen 84 can be measured.
As shown in figures 1 and 3, the slideway 72 that mounting bracket 7 includes the support 71 of groove-like and is arranged on support 71, support
71 enclose by riser 711 and perpendicular to the transverse slat 712 of riser 711 and are formed, and support 71, which is two, and the notch of support 71 is relative sets
Put, side of the transverse slat 712 away from ground is provided with slideway 72, and the restocking of slideway 72 is provided with slide mass 73, and slide mass 73 is perpendicular to support
71 and slide mass 73 totally four, slide mass 73 is evenly arranged in the slideway 72 of the upper side and lower side, and slide mass 73 includes connecting plate
731 and the sliding block 732 at the both ends of connecting plate 731 is arranged on, sliding block 732 is fastened on slideway 72, and slide mass 73 can be on slideway 72
Slide, in this way, by the way that pulling force sensor 4 and torsion torque sensor 5 are arranged on mounting bracket 7, and by torque arm 53 by spiral
Oar 1, the seat 3 low with motor of motor 2 for being arranged on the rear of motor 2 connect, and the slip by that can be slided on slideway 72
Body 73 make it that the parameter of measurement is more accurate, optimizes the practical performance of the integrated test machine of propeller 1.
As shown in Fig. 1,3,4,5,7, support 71 is provided with away from the one end of propeller 1 to be used to improve adding for the bonding strength of support 71
Strong plate 74, the lower end of pulling force sensor seat 41 are worn fixed via bolt or screw and are scheduled in the side wall of reinforcing plate 74, torsion torque sensor seat
51 are held away from the slide mass 73 of the side of propeller 1, and the upper and lower ends of torsion torque sensor seat 51 are consolidated via bolt or screw
It is scheduled in the side wall of connecting plate 731 of the slide mass 73 away from the side of propeller 1, positioned at the connecting plate of the slide mass 73 of upper and lower homonymy
Bearing block is provided between 731, torque arm 53 stretches out from bearing block, in this way, setting the one side of reinforcing plate 74 being capable of reinforced support 71
Steadiness, on the other hand by the way that pulling force sensor seat 41 is fixed in reinforcing plate 74, reinforcing plate 74 is mounted opposite frame 7 not
It is dynamic so that when measuring pulling force parameter, the pulling force parameter read from display screen 84 is more accurate, improves propeller test dress
Put the accuracy when testing pulling force parameter.
Self-aligning ball bearing is provided with bearing block, in this way, in order to bear axial force and footpath of the torque arm 53 to bearing block
Xiang Li, self-aligning ball bearing is provided with bearing block, the spherical shape in self-aligning ball bearing outer ring raceway cross section, there is automatic aligning
Property.
Embodiment two：
The structure of the present embodiment structure and embodiment one is essentially identical, and something in common repeats no more, and difference is：Such as
Shown in Fig. 7, Fig. 8, propeller test machine is arranged in wind tunnel device 8, and wind tunnel device 8 includes casing 81 and is arranged in casing 81
For testing the wind-tunnel 82 of the performance of propeller 1, two support beams for being used to support fixing and mounting bracket 7 are horizontally disposed with wind-tunnel 82
83, the side of casing 81 is provided with the display screen 84 for being used for reflecting test parameter, and the upside of casing 81 is provided with the change for being used for installing transformer
Depressor cover 85, in this way, by the flowing of the learning gas of wind tunnel device 8 and its interaction with propeller 1, to understand actual spiral
The air dynamic behaviour of oar 1, it can relatively accurately control experiment condition, speed, pressure, the temperature of such as air-flow, while reality
Test and carry out indoors, the influence of climate condition and time are small, installation, operation, the use of propeller 1 and propeller test device
More convenient, finally, experiment is safer, and efficiency high, cost are low.
General principle, principal character and the features of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement is both fallen within the range of claimed invention.The scope of protection of present invention is by appended claims
And its equivalent thereof.
Claims (8)
1. a kind of propeller test device, including propeller (1) and it is arranged on propeller (1) rear end and provides rotation for propeller (1)
The motor (2) of rotatory force, described motor (2) are fixed on motor base (3), it is characterised in that also including mounting bracket (7) and
The pulling force sensor (4) that is arranged on mounting bracket (7), torsion torque sensor (5) and pass and fix from one end of mounting bracket (7)
Shock sensor (6) on motor base (3), described pulling force sensor (4), torsion torque sensor (5) and shock sensor
(6) parameter of measurement is transferred to via electric wire respectively and be arranged on the display screen (84) of mounting bracket (7) side.
2. propeller test device according to claim 1, it is characterised in that described pulling force sensor (4) includes solid
The pulling force sensor seat (41) being scheduled on mounting bracket, described pulling force sensor seat (41) are rectangular configuration and pulling force sensor seat
(41) it is provided with and is used to fix the mounting hole of itself and connects the through hole (411) of pulling force sensor body (42), described drawing
Force snesor body (42) includes force-sensing parts and is symmetricly set on the pulling force transfer part at force-sensing parts both ends, the quick device of described power
Pulling force transfer part and through hole (411) connection of part side, the pulling force transfer part of force-sensing parts opposite side and are fixed on tension plate
(43) stayed mast (431) connection on, described tension plate (43) are fixed on torsion torque sensor seat (51).
3. propeller test device according to claim 2, it is characterised in that described torsion torque sensor seat (51) is remote
The side of tension plate (43) is provided with torsion torque sensor (5), and described torsion torque sensor (5) includes being used to be fixed on torsion torque sensor
Installation chassis (52) on seat (51) and the cylinder (521) of installation chassis (52) side is arranged on, described cylinder (521)
Top is extended with the square protruding (522) for transmitting moment of torsion, and embedded torque arm (53) one end of described square protruding (522) is set
In some grooves, described torque arm (53) is horizontally disposed and torque arm (53) other end stretches out mounting bracket (7) and passed with vibrations
One end connection of sensor (6).
4. propeller test device according to claim 3, it is characterised in that described shock sensor (6) includes solid
It is scheduled on second installation chassis (61) of remote motor (2) side of motor base (3) and is used positioned at the second installation chassis (61) side
One of the vibrations head (62) of parameter, described vibrations head (62) and torque arm (53) away from torsion torque sensor (5) is shaken in test
End connection.
5. propeller test device according to claim 1, it is characterised in that described mounting bracket (7) includes groove-like
Support (71) and the slideway (72) that is arranged on support (71), described support (71) is by riser (711) and perpendicular to riser
(711) transverse slat (712) encloses to be formed, and support (71) is two and the notch of support (71) is oppositely arranged, described transverse slat
(712) side away from ground is provided with slideway (72), and described slideway (72) restocking is provided with slide mass (73), described slide mass
(73) it is evenly arranged in the slideway (72) of the upper side and lower side perpendicular to support (71) and slide mass (73) totally four, slide mass (73)
Interior, described slide mass (73) includes connecting plate (731) and is arranged on the sliding block (732) at connecting plate (731) both ends, described cunning
Block (732) is fastened on slideway (72), and slide mass (73) can slide on slideway (72).
6. propeller test device according to claim 5, it is characterised in that described support (71) is away from propeller
(1) one end is provided with the reinforcing plate (74) for being used for improving support (71) bonding strength, described pulling force sensor seat (41) lower end warp
Fixed is worn by bolt or screw to be scheduled in reinforcing plate (74) side wall, described torsion torque sensor seat (51) is held away from propeller
(1) on the slide mass (73) of side, the upper and lower ends of torsion torque sensor seat (51) are fixed on slide mass via bolt or screw
(73) in connecting plate (731) side wall away from propeller (1) side, positioned at the connecting plate of the slide mass (73) of upper and lower homonymy
(731) bearing block is provided between, described torque arm (53) stretches out from bearing block.
7. propeller test device according to claim 6, it is characterised in that be provided with spherical ball axle in described bearing block
Hold.
8. according to any described propeller test devices of claim 1-7, it is characterised in that described propeller test machine is set
Put in wind tunnel device (8), described wind tunnel device (8) includes casing (81) and be arranged in casing (81) to be used to test spiral
The wind-tunnel (82) of oar (1) performance, two are horizontally disposed with described wind-tunnel (82) and is used to support the supports of fixing and mounting bracket (7) horizontal
Beam (83), described casing (81) side are provided with the display screen (84) for being used for reflecting test parameter, described casing (81) upside
Provided with the transformer cover (85) for installing transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711085818.8A CN107764536A (en) | 2017-11-07 | 2017-11-07 | Propeller test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711085818.8A CN107764536A (en) | 2017-11-07 | 2017-11-07 | Propeller test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107764536A true CN107764536A (en) | 2018-03-06 |
Family
ID=61273654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711085818.8A Withdrawn CN107764536A (en) | 2017-11-07 | 2017-11-07 | Propeller test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107764536A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444631A (en) * | 2018-07-05 | 2018-08-24 | 陈俊胤 | A kind of real-time stretching force detecting apparatus of unmanned plane and its pull force calculation method |
| CN112710419A (en) * | 2019-10-08 | 2021-04-27 | 灵翼飞航（天津）科技有限公司 | Tension and torque testing device of unmanned aerial vehicle test bench |
-
2017
- 2017-11-07 CN CN201711085818.8A patent/CN107764536A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444631A (en) * | 2018-07-05 | 2018-08-24 | 陈俊胤 | A kind of real-time stretching force detecting apparatus of unmanned plane and its pull force calculation method |
| CN112710419A (en) * | 2019-10-08 | 2021-04-27 | 灵翼飞航（天津）科技有限公司 | Tension and torque testing device of unmanned aerial vehicle test bench |
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Application publication date: 20180306 |
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