CN107583875B - Table tennis bounce performance detection device - Google Patents
Table tennis bounce performance detection device Download PDFInfo
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- CN107583875B CN107583875B CN201710894867.XA CN201710894867A CN107583875B CN 107583875 B CN107583875 B CN 107583875B CN 201710894867 A CN201710894867 A CN 201710894867A CN 107583875 B CN107583875 B CN 107583875B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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Abstract
The invention discloses a device for detecting the bounce performance of a table tennis, which comprises a zero initial velocity releasing device, a bouncing device, an information collecting device, a ball receiving hopper device, a turntable device and a classification collecting device, wherein the zero initial velocity releasing device can ensure the zero initial velocity release during the bounce performance test of the table tennis, and eliminates the influence of the initial velocity of the table tennis on the precision of a measuring result during the bounce performance test of the table tennis; the arrangement of the bouncing device simplifies the measurement of the angle of the bouncing inclined plate; shooting the bounce peak of the table tennis through a high-speed camera of the information acquisition device so as to obtain bounce performance parameters and carrying out star classification on the bounce performance parameters, so that the accuracy is high; the rotary disc device ensures the storage and classification of the table tennis balls. The invention improves the accuracy of the table tennis bounce detection performance test.
Description
Technical Field
The invention relates to a table tennis performance detection device, in particular to a table tennis bounce performance detection device.
Background
As the table tennis is used as a Chinese ball, the requirements on the measurement accuracy and efficiency of the table tennis are higher and higher along with the continuous improvement of the competitive level of the table tennis and the invention of seamless table tennis. At present, a real-time online monitoring method suitable for seamless table tennis and seamed table tennis simultaneously does not exist, balls required by international top-level events need to be manually screened from a large number of products, the efficiency is low, the false detection rate is high, and the quality cannot be guaranteed.
According to the regulation of 40mm table tennis in national standard GB/T20045-2005, the table tennis performance detection indexes comprise five parameters of weight, hardness, eccentricity, roundness and bounce, and the quality of the bounce performance of the table tennis is judged through comprehensive evaluation of the five parameters. The definition of the elasticity of the table tennis ball is that the table tennis ball freely falls on a specified steel plate at the height of 305mm, and the bounce height of the table tennis ball is between 240 mm and 260 mm. The national standard adopts a light-operated type and a bounce inclined plate pit type to test the bounce performance of the table tennis, and the table tennis is manually placed at a test position before measurement, so that automatic measurement cannot be realized, namely, the two test methods cannot ensure that the table tennis to be tested is automatically released at zero initial speed, and the error of the table tennis bounce performance test result is larger.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a device for detecting the bounce performance of a table tennis.
The technical scheme adopted by the invention is as follows: a device for detecting the bounce performance of table tennis comprises a zero initial velocity releasing device, a bouncing device, an information collecting device, a ball collecting funnel device, a turntable device and a classification collecting device which are of a three-jaw chuck structure; the zero initial speed release device is fixedly arranged above the bouncing device through a fixed rod; the bouncing device is fixedly arranged at the edge of the ball receiving funnel device; the rotary disc device is rotatably arranged below the ball receiving funnel device; the classified collection device comprises a plurality of collection devices, and a plurality of collection device boxes are arranged below the periphery of the rotary table device and are positioned at the ball falling position of the ball outlet of the rotary table device; the information acquisition Device comprises a CCD (Charge Coupled Device) camera Device which is arranged on the side surface near the highest point of bounce of the table tennis and is used for shooting the bounce process of the table tennis, and an information processing and transmitting Device which is respectively connected with the CCD camera Device and the turntable Device.
The bouncing device comprises a bouncing inclined plate and a horizontal plate which are arranged at a fixed angle, and a gauge block which is arranged between the bouncing inclined plate and the horizontal plate to determine the angle between the bouncing inclined plate and the horizontal plate and simplify the measurement of the angle into the measurement of the length.
The gauge block is fixed between the bouncing inclined plate and the horizontal plate through a gauge block fixing device.
The ball receiving funnel device comprises a ball receiving funnel and a ball outlet channel; the center of the ball receiving funnel is arranged at the position where the standard table tennis bounces into the ball receiving funnel; the ball outlet channel is connected to the central bottom of the ball receiving funnel and is coaxially connected with the ball receiving funnel.
The inner diameter of the ball outlet channel is larger than the outer diameter of the table tennis.
The turntable device comprises an inclined plane ball storage device which is positioned below a ball outlet channel of the ball receiving hopper device and can rotate left and right, the lower point of the inclined plane ball storage device is a ball outlet, and a baffle plate capable of moving up and down is arranged on the ball outlet; the movement of the baffle and the steering of the inclined plane ball storage device are driven by a control motor, and the control motor is connected with the information processing and transmitting device.
The inner diameter of the inclined plane ball storage device is smaller than the outer diameter of the table tennis.
The beneficial effects of the invention are: in the invention, the three-jaw chuck structure is adopted as a zero initial velocity releasing device for the bounce performance test of the table tennis, so that the bounce performance test of the table tennis can be ensured to be that the table tennis falls to a bounce steel plate at a zero initial velocity, and the error of the bounce performance test of the table tennis is greatly reduced; the angle is determined more accurately by converting the determined angle into the measurement of the length by adopting the gauge block; the bounce peak is obtained through the CCD camera device, the signal quantity required to be detected is small, the detection speed is high, external interference factors are few, the measurement is accurate, and the precision is high; the star-level classification ball collection of the table tennis balls is ensured through the turntable device, the structure is simple, and the operation is easy.
Drawings
FIG. 1: the invention discloses a structural schematic diagram of a device for detecting the bouncing performance of a table tennis;
FIG. 2: the invention relates to a zero initial velocity release device structure diagram of a table tennis bounce performance detection device;
FIG. 3: the invention discloses a structural schematic diagram of a turntable device of a table tennis bounce performance detection device.
The attached drawings are marked as follows: 1. the device comprises a fixing rod, 2, a deflector rod, 3, an inner ring, 4, an outer ring, 5, a three-jaw mechanism, 6, a bounce inclined plate, 7, a horizontal plate, 8, a measuring block, 9, a measuring block fixing device, 10, a CCD (charge coupled device) camera device, 11, an information processing and transmitting device, 12, a ball receiving funnel, 13, a ball outlet channel, 14, a baffle, 15, an inclined plane ball storage device, 16, a control motor, 17 and a classification and collection device.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, a device for detecting the bouncing performance of a table tennis comprises a zero initial velocity releasing device, a bouncing device, an information collecting device, a ball collecting hopper device, a turntable device and a classification collecting device 17.
The zero initial velocity releasing device is fixedly arranged above the bouncing device through a fixing rod 1. The zero initial speed release device adopts a three-jaw chuck structure in an optical lens, and specifically comprises a driving lever 2, an outer ring 4, an inner ring 3 and a three-jaw mechanism 5. The outer ring 4 is fixed on the fixed rod 1, and the outer ring 4 and the fixed rod 1 do not move relatively; the inner ring 3 is fixed in the outer ring 4 and can rotate in the outer ring 4; the driving lever 2 is fixed on the inner ring 3, and no relative motion exists between the driving lever 2 and the inner ring 3; the three-jaw mechanism 5 comprises three jaw bodies arranged along the circumferential direction, two sides of the bottom end of each jaw body are respectively fixed on the outer ring 4 and the inner ring 3, wherein one side of the bottom end of each jaw body is rotatably connected with the inner ring 3 through a pin, and the jaw bodies only rotate relative to the fixed point (pin) of the inner ring 3; the other side of the bottom end of the claw body is provided with a motion groove, a screw penetrates through the motion groove to be connected with the claw body and the outer ring 4 and can slide in the motion groove, the claw body not only rotates but also horizontally moves relative to the joint (the screw) with the outer ring 4, and the change of the distance between the pin and the screw is ensured through the motion groove in the claw body. The rotation of the shift lever 2 drives the inner ring 3 to rotate, so as to drive the three-jaw mechanism 5 to rotate, and the size of the arc diameter determined by three points at the top ends of the three jaw bodies is controlled. When the shift lever 2 is rotated counterclockwise, that is, when the inner ring 3 is rotated counterclockwise, the diameter of the circle formed by the tips of the three claws is decreased, whereas when the shift lever 2 is rotated clockwise, that is, when the inner ring 3 is rotated clockwise, the diameter of the circle formed by the tips of the three claws is increased. The size of the circle determined by the three points determines whether the table tennis ball stays in the zero initial velocity releasing device or is released by the zero initial velocity releasing device. When the diameter of the circle formed by the top ends of the three claws is smaller than the diameter of the table tennis ball, the table tennis ball is placed on the zero initial speed release device, the shifting rod 2 is moved, the three claws move simultaneously, the diameter of the circle formed by the top ends of the three claws is increased until the diameter of the circle is larger than the diameter of the table tennis ball, and the table tennis ball performs zero initial speed vertical free-fall motion through the zero initial speed release device.
The bouncing device comprises a bouncing inclined plate 6 and a horizontal plate 7 which are arranged at a fixed angle, and a gauge block 8 which is arranged between the bouncing inclined plate 6 and the horizontal plate 7 to determine the angle between the bouncing inclined plate 6 and the horizontal plate 7 and simplify the measurement of the angle into the measurement of the length, wherein the gauge block 8 is fixed between the bouncing inclined plate 6 and the horizontal plate 7 through a gauge block fixing device 9. The bounce inclined plate 6 with fixed angle between the horizontal plate 7 is determined by the height of gauge block 8 between the bounce inclined plate 6 and the horizontal plate 7 and the position of gauge block 8 on the horizontal plate 7, because the angle between the bounce inclined plate 6 and the horizontal plate 7 is measured directly for length measurement and is more inconvenient and the error is larger, the problem of determining the angle is converted into the problem of measuring the length, the height of gauge block 8 is standard height, and therefore the angle between the horizontal plate 7 and the bounce inclined plate 6 can be determined only by determining the distance between the intersection line of the bounce inclined plate 6 and the horizontal plate 7 and the gauge block 8. The bouncing device is fixedly arranged at the edge of the ball collecting funnel device, and the measured table tennis falls on the bouncing inclined plate 6 to bounce and then enters the ball collecting funnel device.
The information acquisition device comprises a CCD camera device 10 which is arranged on the side surface near the bounce peak of the table tennis and is used for shooting the rebounding process of the table tennis, and an information processing and transmitting device 11 which is respectively connected with the CCD camera device 10 and a control motor 16 of the turntable device. The table tennis ball falls to the bounce sloping plate 6 through the zero initial velocity releasing device and then rebounds, the CCD camera device 10 shoots the process of the table tennis ball rebounding, the position information of the table tennis ball bouncing on the bounce sloping plate 6 is collected, the height value of the highest point of the table tennis ball rebounding is obtained through the information processing and transmitting device 11, and the classification information is transmitted to the turntable device through the table tennis ball star classification.
The ball receiving funnel device comprises a ball receiving funnel 12 and a ball outlet channel 13. The collecting hopper is used for receiving the ping-pong balls rebounded by the bouncing sloping plate 6. To prevent table tennis balls from bouncing out of the funnel, the ball collection funnel 12 is centrally disposed at a location where standard table tennis balls bounce into the ball collection funnel 12, and the ball collection funnel 12 is made large enough to prevent table tennis balls with large errors from bouncing out of the ball collection funnel 12. The ball outlet channel 13 is connected to the central bottom of the ball receiving funnel 12 and is coaxially connected with the ball receiving funnel 12, and the table tennis ball is released at zero initial velocity, so that the table tennis ball can fall to the vicinity of the ball outlet channel 13 as long as the bounce error of the table tennis ball is not large. The inner diameter of the ball outlet channel 13 is larger than the outer diameter of the table tennis balls, and the table tennis balls enter the ball collecting hopper 12, enter the ball outlet channel 13 due to gravity and then enter the rotary table device.
The rotary disc device is rotatably arranged below the ball receiving funnel device. The rotary table device comprises an inclined plane ball storage device 15 which is positioned below the ball outlet channel 13 of the ball receiving funnel device and can rotate left and right, and the inner diameter of the inclined plane ball storage device 15 is smaller than the outer diameter of the table tennis; the lower point of the inclined plane ball storage device 15 is a ball outlet, and a baffle 14 capable of moving up and down is arranged on the ball outlet; the movement of the baffle plate 14 and the steering of the inclined plane ball storage device 15 are driven by a control motor 16, and the control motor 16 is connected with the information processing and transmitting device 11. The table tennis enters the rotary table device from the ball receiving hopper device and falls on the inclined plane ball storage device 15, and the table tennis cannot roll down due to the existence of the baffle plate 14; because the control motor 16 can control the baffle plate 14 to move vertically, after the baffle plate 14 moves downwards, the table tennis balls can freely roll down to the collecting device, and the table tennis balls fall into which ball collecting device is the inclined plane ball storing device 15 rotated to the corresponding collecting device by the control motor 16 according to the information processed by the information processing and transmitting device 11.
The sorting and collecting device 17 comprises a plurality of collecting devices, a plurality of collecting device boxes are arranged below the periphery of the rotary table device and are positioned at the ball falling position of the ball outlet of the rotary table device; in this embodiment, the collection device is three, collects superior quality article, certified products and defective work respectively. When the table tennis ball enters the sorting and collecting device 17, the test is finished.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (5)
1. A device for detecting the bounce performance of table tennis is characterized by comprising a zero initial velocity releasing device, a bouncing device, an information collecting device, a ball collecting hopper device, a turntable device and a classification collecting device which are of a three-jaw chuck structure; the zero initial speed release device is fixedly arranged above the bouncing device through a fixed rod; the bouncing device is fixedly arranged at the edge of the ball collection funnel device; the rotary disc device is arranged below the ball collecting funnel device in a rotatable manner; the classified collection device comprises a plurality of collection devices, and a plurality of collection device boxes are arranged below the periphery of the rotary table device and are positioned at the ball falling position of the ball outlet of the rotary table device; the information acquisition device comprises a CCD camera device which is arranged on the side surface near the bounce peak of the table tennis and is used for shooting the rebounding process of the table tennis, and an information processing and transmitting device which is respectively connected with the CCD camera device and the turntable device;
the bouncing device comprises a bouncing sloping plate and a horizontal plate which are arranged at a fixed angle, and a gauge block which is arranged between the bouncing sloping plate and the horizontal plate to determine the angle between the bouncing sloping plate and the horizontal plate and simplify the measurement of the angle into the measurement of the length;
the rotary disc device comprises an inclined plane ball storage device which is positioned below a ball outlet channel of the ball receiving funnel device and can rotate left and right, the inclined plane low point of the inclined plane ball storage device is a ball outlet, and a baffle plate capable of moving up and down is arranged on the ball outlet; the movement of the baffle and the steering of the inclined plane ball storage device are driven by a control motor, and the control motor is connected with the information processing and transmitting device.
2. The device for detecting bounce performance of table tennis according to claim 1, wherein said gauge block is fixed between said bounce sloping plate and said horizontal plate by a gauge block fixing device.
3. The apparatus of claim 1, wherein the ball receiving funnel device comprises a ball receiving funnel and a ball outlet channel; the center of the ball receiving funnel is arranged at the position where the standard table tennis bounces into the ball receiving funnel; the ball outlet channel is connected to the central bottom of the ball receiving funnel and is coaxially connected with the ball receiving funnel.
4. The device for detecting bouncing performance of table tennis according to claim 3, wherein the inner diameter of the ball outlet channel is larger than the outer diameter of the table tennis.
5. The device for detecting bouncing performance of table tennis as claimed in claim 1, wherein the inner diameter of the inclined plane ball storage device is smaller than the outer diameter of the table tennis.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710894867.XA CN107583875B (en) | 2017-09-28 | 2017-09-28 | Table tennis bounce performance detection device |
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| CN201710894867.XA CN107583875B (en) | 2017-09-28 | 2017-09-28 | Table tennis bounce performance detection device |
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| CN107583875A CN107583875A (en) | 2018-01-16 |
| CN107583875B true CN107583875B (en) | 2023-04-18 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108635780B (en) * | 2018-04-03 | 2023-04-18 | 南京信息工程大学 | Table tennis ball pickup device |
| CN108918104A (en) * | 2018-04-27 | 2018-11-30 | 南华大学 | A kind of basketball performance parameter intelligent checking system |
| CN110108319B (en) * | 2019-04-29 | 2021-04-02 | 张彩星 | Table tennis specification detection device |
| CN110388855B (en) * | 2019-07-18 | 2021-07-20 | 西安工业大学 | Method and device for testing bounce height |
| CN110479639B (en) * | 2019-08-16 | 2021-01-29 | 吉林师范大学 | Device applied to table tennis hidden crack detection and using method thereof |
| CN111307578B (en) * | 2020-02-25 | 2023-02-07 | 厦门市省力机械有限公司 | Bounce height testing machine |
| CN112903221B (en) * | 2021-02-09 | 2023-03-31 | 诸暨博仕文弹簧有限公司 | Spring elasticity detection device with convenient positioning for spring test |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2581859B2 (en) * | 1991-10-28 | 1997-02-12 | 早川ゴム株式会社 | Golf ball sorting device and golf ball used therefor |
| CN2593849Y (en) * | 2002-12-20 | 2003-12-24 | 胡誉 | Table tennis ball collector |
| CN200981056Y (en) * | 2006-12-08 | 2007-11-28 | 华南农业大学 | Detection separator for table tennis |
| CN205786141U (en) * | 2016-05-25 | 2016-12-07 | 关山 | A kind of table tennis and table tennis table elasticity special detector |
| CN106345704B (en) * | 2016-09-23 | 2018-09-18 | 天津大学 | A kind of seamless table tennis anti-pumping performance detection sorting unit |
| CN207494053U (en) * | 2017-09-28 | 2018-06-15 | 天津大学 | A kind of table tennis anti-pumping performance detection device |
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