CN105388064B - Tennis pats string static rigidity measurement apparatus and method - Google Patents
Tennis pats string static rigidity measurement apparatus and method Download PDFInfo
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- CN105388064B CN105388064B CN201510716580.9A CN201510716580A CN105388064B CN 105388064 B CN105388064 B CN 105388064B CN 201510716580 A CN201510716580 A CN 201510716580A CN 105388064 B CN105388064 B CN 105388064B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N2033/0078—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00 testing material properties on manufactured objects
- G01N2033/008—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00 testing material properties on manufactured objects sport articles (balls, skis, rackets)
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
String static rigidity measurement apparatus and method are patted the invention discloses a kind of tennis, the device includes stepper motor, lift, shaft coupling, pressure sensor, spider, tennis racket clamping device, laser displacement sensor, depression bar, X Y line slideways, stepper motor is coupled with lift by shaft coupling, lift is arranged on base of frame by lift installing plate, lift screw tip couples with pressure sensor, pressure sensor is in below spider, it is clamped in above and below spider on bat string, tennis racket clamping device is pressed in aluminum section frame top of the trellis by aluminium section bar depression bar, X-direction line slideway is fixed on aluminium section bar depression bar, Y direction line slideway is connected in by guide rail splice on the sliding block of X-direction line slideway, laser displacement sensor couples with the sliding block of Y direction line slideway, laser displacement sensor is set arbitrarily to be moved along plane.The present invention has control simple and reliable, the advantages of with low cost.
Description
Technical field
The present invention relates to a kind of measurement apparatus, and in particular to it is a kind of be used for measure tennis pat string static rigidity device and
Method.
Background technology
Tennis is the motion of a grace and fierceness, with very strong competitive and sight, deep to be liked by the masses, is
One of most popular sports events in the world today, is referred to as second-biggest-in-the-world ball game.
In China, tennis has become popular, the sports events as the whole society, starts to be paid close attention to by more people, very
Many schools have all built up tennis court, and as the required course of sports curriculum, many cities, which are also injected capital into, sets up Tennis Center, will
Tennis is included in nationwide fitness programs project, and these all greatly excite the enthusiasm that our people actively joins in tennis, promote
The development of China's tennis.
In addition, tennis has dual character as other motions, it may ensure that sporter's is healthy, but fortune
It is dynamic improper also to produce athletic injury.Typical tennis injury has wrist joint, elbow joint, shoulder joint, waist joint, knee joint
With spraining and muscle, ligament injury for ankle-joint, these athletic injurys mainly with the excess load vibratory impulse power suffered by muscle group
It is relevant, especially it is easier to occur when technical movements are lack of standardization or too have an effect.
The rigidity of racket string is most basic element in tennis.Clap string rigidity difference will directly affect tennis with
The size of active force in racket knockout process, and then influence the technical movements of sportsman's square stance.The rigidity that different materials have
It is different, the normalization that suitable rigidity is acted to sportsman has important effect, suitable rigidity both can guarantee that sportsman hit
Ball action is more reasonable, and sportsman can be made to hold the dynamics of square stance exactly again, so as to reduce athletic injury, improves sports water
It is flat, therefore be particularly important for the research of the static rigidity of racket string.
A set of measurement apparatus is designed, tennis racket string static rigidity is measured and experimental study, tennis and racket is disclosed
The changing rule of power in knockout process, helps sportsman's selection to be adapted to the bat string rigidity of oneself, makes athletic performance more reasonable, it is to avoid by
To injury, it has also become technical problem urgently to be resolved hurrily.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of tennis and has patted string static state just
Measurement apparatus and method are spent, deflection of the tennis racket when specifying stress size can be measured, so as to calculate tennis racket
The rigidity value in face.
Technical scheme：In order to solve the above technical problems, the tennis that the present invention is provided pats string static rigidity measurement apparatus, wrap
Including rack-mounted power section, clamping part and clamping part described in sensor detecting portion is used for the tested tennis of clamping
Clap, the power section is used to apply pressure to tennis face, and the sensor detecting portion is used for the change for measuring tennis face
Shape amount, the power section is arranged on the side of clamping part, and the sensor detecting portion is arranged on the another of clamping part
Side.
Preferably, the power section includes spider, pressure sensor, lift and the electricity coupled successively
Machine, the spider pats string for clamping tennis.The pressure that tennis pats string is applied to so as to accurately control.
Stepper motor controls to rotate by shaft coupling drive lift input shaft after driver driving by PLC makes the output spiral shell of lift
Bar vertical ascent, the output screw top of lift is by a pressure sensor connector coupling pressure sensor, and pressure is passed
The sensitive part of sensor is against the lower surface of spider, and spider is locked on the right-angled intersection point of tennis racket string, adopted
Pressure of the lift to tennis face can be gathered in real time with this mounting means.
Preferably, the sensor detecting portion includes displacement mechanism and laser displacement sensor, the laser displacement
Sensor is used for the displacement for measuring spider upper surface, and institute's displacement mechanism is used to drive laser displacement sensor in net
Racket is moved on face.So laser displacement sensor can arbitrarily be moved in plane, and laser displacement sensor is by getting to cross
The laser that the upper surface of fastener is reflected back carrys out the deflection in survey grid racket face.
Preferably, the motor is stepper motor, the clamping part has two pieces of clampings for being used to clamp tennis racket
The position that corresponding tennis pats string on plate, the clamping plate offers through hole.
Preferably, institute's displacement mechanism is X-Y line slideways, including X-direction line slideway, X-direction sliding block, Y
Direction of principal axis line slideway and Y direction sliding block, the X-direction line slideway are fixed in frame, and the Y direction straight line is led
Rail is connected on the X-direction sliding block by guide rail splice, and the laser displacement sensor joins with the Y direction sliding block
Connect.Laser displacement sensor can be moved to any point using this mounting means to go to measure the deflection of tennis racket.
Preferably, the frame is aluminum section bar frame.
Preferably, the clamping device is fitted in frame top by depression bar, the depression bar is arranged on machine by fastener
On frame.So when aluminium section bar depression bar unclamps, tennis racket clamping device can arbitrarily be moved in frame roof, be easy to following
Lift tennis is patted string arbitrfary point apply pressure.Clamping device includes about two pieces clamping plates, two padded aluminium profiles
Material, two aluminium section bar depression bars, four tie down screws, four threaded blocks, tennis racket are sandwiched between two pieces of clamping plates, padded aluminium profiles
Material is by being threadably coupled within lower clamping plate, and clamping device is by way of two aluminium section bar depression bars are pressed on padded aluminium section bar
It is pressed on aluminum section bar frame, aluminium section bar depression bar punching two ends, four tie down screws are twisted through the hole at aluminium section bar depression bar two ends
Aluminium section bar depression bar is compressed in threaded block, threaded block is fixed on aluminum section bar frame
The present invention proposes that above-mentioned tennis pats the measuring method of string static rigidity measurement apparatus simultaneously, comprises the following steps:
Step 1, by tennis racket clamping between two pieces of clamping plates of clamping part, then by depression bar by clamping device clamping
In frame；
Step 2, the install sensor detection part above depression bar；
Step 3, apply pressure to tennis face using power section, pressure sensor is gathered using PLC in real time
Signal, and motor is controlled；
Step 4, the deflection at the compression of laser displacement sensor Test Network racket string.
Above-mentioned test can simulate the process for causing tennis racket to deform during tennis collision face.
Apparatus of the present invention are in measurement, and stepper motor controls driver to be lifted after driving by shaft coupling drive by PLC
The rotation of machine input shaft makes the output screw vertical ascent of lift, and the speed reducing ratio of lift is 24:1, it can greatly slow down net
The deformation velocity in racket face, when the output screw of lift rises, the pressure sensor top of its top attachment to spider
Lower end, makes spider be deformed upwardly with tennis racket, and such pressure sensor can measure tennis face institute in real time
The pressure being subject to, now tennis racket frame by clamping plate up and down due to being clamped, and clamping plate is pressed in aluminium shape surface by depression bar,
So tennis frame will not be moved up and down so that the pressure that lift is provided only results in the deformation of tennis face, this process is
Simulation tennis collision tennis racket is the process that the pressure applied to tennis racket causes tennis racket to deform.Laser displacement sensor passes through
X-Y line slideways can be moved to tennis face optional position, and when being just moved to above spider, laser displacement is sensed
Device can measure the deformation of tennis face.
Beneficial effect：Compared with prior art, there is following significant progress in the present invention：
1st, it is simple in construction.The framework that the present invention relates to is built using aluminium section bar, simple firm, involved by device
Number of parts it is few, it is easy to install；
2nd, control simple and reliable.The control section of the present invention uses PLC controls, can make stepper motor in any pressure
Stop during value, program sets next target pressure value automatically, with control it is simple and reliable the characteristics of.
Except the technical problem of invention described above solution, the technical characteristic of composition technical scheme and by these skills
Outside the advantage that the technical characteristic of art scheme is brought, tennis of the invention is patted string static rigidity measurement apparatus and method and can solved
The advantage that the other technical characteristics and these technical characteristics included in other technologies problem certainly, technical scheme are brought, will be tied
Accompanying drawing is closed to be described in more detail.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the structural representation of power section in Fig. 1；
Fig. 3 is the structural representation in clamping device in Fig. 1；
Fig. 4 is the structural representation of sensor detecting portion in Fig. 1；
In figure：It is lift 1, shaft coupling 2, stepper motor 3, stepper motor mounting bracket 4, threaded block 5, tie down screw 6, padded
Aluminium section bar 7, lower clamping plate 8, upper clamping plate 9, X-direction line slideway 10, laser displacement sensor 11, Y-direction line slideway 12,
Aluminium section bar depression bar 13, spider 14, tennis racket 15, lift installing plate 16, sensor connecting piece 17, pressure sensor
18。
Embodiment
Embodiment：
The tennis racket string static rigidity measurement apparatus of the present embodiment is as shown in figure 1, including aluminum section bar frame with being arranged on aluminium
Power section, clamping part and sensor detecting portion on section material framework.Including lift 1, shaft coupling 2, stepper motor
3rd, stepper motor mounting bracket 4, threaded block 5, tie down screw 6, padded aluminium section bar 7, lower clamping plate 8, upper clamping plate 9, X-direction straight line
Guide rail 10, laser displacement sensor 11, Y-direction line slideway 12, aluminium section bar depression bar 13, spider 14, the and of tennis racket 15
Lift installing plate 16.
Wherein, stepper motor 3 is coupled with lift 1 by shaft coupling 2, and lift 1 is installed by lift installing plate 16
In base of frame, the screw tip of lift 1 couples with pressure sensor, and pressure sensor is in below spider 14,
Spider is clamped in about 14 on bat string, and clamping device is pressed in aluminum section frame top of the trellis, X-direction by aluminium section bar depression bar 13
Line slideway 10 is fixed on aluminium section bar depression bar 13, and it is straight that Y direction line slideway 12 is connected in X-direction by guide rail splice
On the sliding block of line guide rail 10, laser displacement sensor 11 couples with the sliding block of Y direction line slideway 12, senses laser displacement
Device 11 can arbitrarily be moved along plane.
As shown in Fig. 2 in power section, lift installing plate 16, which is connected by bolts, is fixed on aluminum section bar frame bottom
Portion, stepper motor 3, which is connected by bolts, to be fixed on stepper motor mounting bracket 4, and stepper motor mounting bracket 4 is connected by bolts solid
Be scheduled on lift installing plate 16, lift 1, which is connected by bolts, to be fixed on lift installing plate 16, stepper motor 3 it is defeated
The input shaft of shaft and lift 1 is concentric, is coupled the output shaft of stepper motor 3 with the input shaft of lift 1 by shaft coupling 2
Together.The output screw top of lift 1 is connected with sensor connecting piece 17, sensor connecting piece 17 and pressure by thread connection
Force snesor 18 is fixed together by thread connection.Spider 14 is tightly locked on the crosspoint of tennis racket string to be passed with pressure
Sensor 18 is contacted.
As shown in figure 3, in clamping device, tennis racket 15 is clipped in the middle by upper clamping plate 9 with lower clamping plate 8, it is upper to clamp
Plate 9 is connected by bolts locking with lower clamping plate 8, and two padded aluminium section bars 7 are separately installed with the lower left and right sides of clamping plate 8,
Purpose, which is easy for aluminium section bar depression bar 13, can be pressed on padded aluminium section bar 7 without being interfered with upper clamping plate 9, by upper clamping plate 9,
The clamping part that lower clamping plate 8 is constituted with padded aluminium section bar 7 is placed directly in aluminium section bar upper surface, facilitates random mobile network racket 15
Remove the rigidity value of measurement face difference.Four threaded blocks 5, which are connected by bolts, is fixed on aluminium section bar upper surface, two aluminium section bars
The punching two ends of depression bar 13, four tie down screws 6 pass through the hole at two two ends of aluminium section bar depression bar 13 and threaded block 5 to pass through thread connection
It is fixed together, it is motionless so clamping part can be pressed in into aluminium section bar upper surface by tie down screw 6, aluminium section bar depression bar 13.
As shown in figure 4, sensor detecting portion is used for the measurement of tennis racket facial disfigurement, two width X-direction line slideways 10 lead to
Cross bolt-connection to be fixed on aluminium section bar depression bar 13, Y-direction line slideway 12, which is connected by bolts, is fixed on two width X-direction straight lines
On the sliding block of guide rail 10.Laser displacement sensor 11 is connected by bolts on the fixed sliding block of line slideway 12 in the Y direction, so
Laser displacement sensor 11 can be moved arbitrarily in the plane, be easy to measure face deflection a little.
The course of work of above-mentioned tennis racket string static rigidity measurement apparatus is as follows：
The light beam of laser displacement sensor 11 is aligned by experiment with the upper surface center of circle of spider 14 at the beginning, is rotated
Tennis racket clamping part is pressed in aluminium section bar upper surface by four tie down screws 6.Stepper motor 3 drives the rotation of the input shaft of lift 1,
Lift 1 is by the translating rotation of input shaft into the linear motion of the output screw of lift 1, and the output screw of lift 1 is with sensing
Spider 14 is withstood in motion upwards for device connector 17 and pressure sensor 18, and spider 14 can drive tennis racket string
Deform upon, now pressure sensor 18 can gather the pressure that tennis racket string is received, and feed back in PLC, work as pressure
Value reaches that desired value is that PLC sends instruction and makes step motor stop, now reads the value of laser displacement sensor, will press
Force value brings Rigidity Calculation formula into shift value just can calculate the rigidity value of the point.
In test tennis racket string during other rigidity put, first come loose four tie down screws 6, mobile network racket clamping part,
Make to measure and be a little aligned with pressure sensor 18, then lock four tie down screws 6, it is other measurable points to repeat said process
Rigidity value.
Embodiments of the present invention are described in detail above in association with accompanying drawing, but the present invention is not limited to described reality
Apply mode.For one of ordinary skill in the art, in the range of the principle and technological thought of the present invention, to these implementations
Mode carries out a variety of changes, modification, replacement and deformation and still fallen within protection scope of the present invention.
Claims (6)
1. a kind of tennis pats string static rigidity measurement apparatus, including rack-mounted power section, clamping part and biography
Sensor detection part, the clamping part is used for clamping and is tested tennis racket, and the power section, which is used to apply to tennis face, presses
Power, the sensor detecting portion is used for the deflection for measuring tennis face, and the power section is arranged on the one of clamping part
Side, the sensor detecting portion is arranged on the opposite side of clamping part, it is characterised in that：
The power section includes spider, pressure sensor, lift and the motor coupled successively, the cross fastening
Part pats string for clamping tennis；The sensor detecting portion includes displacement mechanism and laser displacement sensor, the laser
Displacement transducer is used for the displacement for measuring spider upper surface, and institute's displacement mechanism is used to drive laser displacement sensor
Relative to the movement of tennis face.
2. tennis according to claim 1 pats string static rigidity measurement apparatus, it is characterised in that：The motor is stepping
There is motor, the clamping part correspondence tennis on two pieces of clamping plates for being used to clamp tennis racket, the clamping plate to pat string
Position offers through hole.
3. tennis according to claim 1 pats string static rigidity measurement apparatus, it is characterised in that：Institute's displacement mechanism is
X-Y line slideways, including X-direction line slideway, X-direction sliding block, Y direction line slideway and Y direction sliding block, it is described
X-direction line slideway is fixed in frame, and the Y direction line slideway is connected in the X-axis side by guide rail splice
To on sliding block, the laser displacement sensor couples with the Y direction sliding block.
4. tennis according to claim 1 pats string static rigidity measurement apparatus, it is characterised in that：The frame is aluminium profiles
Material framework.
5. tennis according to claim 1 pats string static rigidity measurement apparatus, it is characterised in that：The clamping part quilt
Depression bar is fitted in frame top, and the depression bar is arranged in frame by fastener.
6. tennis according to claim 1 pats the measuring method of string static rigidity measurement apparatus, it is characterised in that including
Following steps:
Step 1, by tennis racket clamping between two pieces of clamping plates of clamping part, then by depression bar by clamping part clamping in machine
On frame；
Step 2, the install sensor detection part above depression bar；
Step 3, apply pressure to tennis face using power section, pressure sensor signal gathered using PLC in real time,
And motor is controlled；
Step 4, the deflection at the compression of laser displacement sensor Test Network racket string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510716580.9A CN105388064B (en) | 2015-10-29 | 2015-10-29 | Tennis pats string static rigidity measurement apparatus and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510716580.9A CN105388064B (en) | 2015-10-29 | 2015-10-29 | Tennis pats string static rigidity measurement apparatus and method |
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| Publication Number | Publication Date |
|---|---|
| CN105388064A CN105388064A (en) | 2016-03-09 |
| CN105388064B true CN105388064B (en) | 2017-11-03 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489921A (en) * | 2018-07-02 | 2019-03-19 | 马鞍山清净环保科技有限公司 | A kind of racket head control device and its application method for multifunctional racket tester |
| CN109507031B (en) * | 2018-12-20 | 2021-02-02 | 南通理工学院 | Welding rigidity detection device |
| US11607589B1 (en) | 2020-10-01 | 2023-03-21 | Mark E. Van Denend | Device for accurately measuring string bed stiffness in a racket |
| CN114459892B (en) * | 2022-02-21 | 2023-11-24 | 江苏普乐菲新材料有限公司 | Racket line intensity intelligent detection equipment |
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| US6132326A (en) * | 1997-09-23 | 2000-10-17 | Jay Schweid, Inc. | Sports implement customizing system |
| JP3144416U (en) * | 2008-06-17 | 2008-08-28 | 有限会社黒部電機 | Racket gut tension measuring device |
| CN101706392A (en) * | 2009-09-28 | 2010-05-12 | 桐乡波力科技复材用品有限公司 | Multifunctional racket tester and testing method thereof |
| CN102657932A (en) * | 2012-05-24 | 2012-09-12 | 西南石油大学 | Tennis racket response online detector |
| CN202994356U (en) * | 2012-11-23 | 2013-06-12 | 东莞铭禹实业有限公司 | Tension force tester for racket mesh wires |
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|---|---|---|---|---|
| FR567476A (en) * | 1923-06-15 | 1924-03-03 | Tennis racket string tension measuring device | |
| US4103546A (en) * | 1976-09-22 | 1978-08-01 | Robert Hickey | Tennis racquet string tension gauge |
| US4055999A (en) * | 1976-12-23 | 1977-11-01 | Cope James R | Tension tester for tennis racket strings |
| US4077256A (en) * | 1977-01-10 | 1978-03-07 | Bruce Lee Hollander | Stringed racket face tension measuring device |
| US4116054A (en) * | 1977-04-25 | 1978-09-26 | Howe John G | Apparatus for measuring the combined resistance to displacement of strings affixed in a racket head |
| US4488444A (en) * | 1981-03-23 | 1984-12-18 | Ulrich Weidmann | Testing device for tennis racquets |
| US4590808A (en) * | 1984-08-24 | 1986-05-27 | Lightfoot Benjamin H | Method and apparatus for determining tension and pressure |
| US4846002A (en) * | 1986-08-29 | 1989-07-11 | Adolf Brunner | Racket-stringing tester |
| US4747314A (en) * | 1986-11-13 | 1988-05-31 | Huang Ben T | Racket tester |
| US4794805A (en) * | 1987-05-04 | 1989-01-03 | Carney William P | Tennis racket string tension tester |
| US6132326A (en) * | 1997-09-23 | 2000-10-17 | Jay Schweid, Inc. | Sports implement customizing system |
| JP3144416U (en) * | 2008-06-17 | 2008-08-28 | 有限会社黒部電機 | Racket gut tension measuring device |
| CN101706392A (en) * | 2009-09-28 | 2010-05-12 | 桐乡波力科技复材用品有限公司 | Multifunctional racket tester and testing method thereof |
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| CN202994356U (en) * | 2012-11-23 | 2013-06-12 | 东莞铭禹实业有限公司 | Tension force tester for racket mesh wires |
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| Publication number | Publication date |
|---|---|
| CN105388064A (en) | 2016-03-09 |
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