Table tennis quality detection method and device

Abstract

The invention discloses a table tennis ball quality detection method and device, and the method comprises the steps: feeding table tennis balls to be detected into a feeding mechanism, and orderly conveying the table tennis balls to a projection mechanism; the table tennis ball to be detected is projected to the speed detection mechanism at a set speed and rebounds repeatedly in the speed detection mechanism; when the to-be-detected table tennis ball rebounds, detecting and collecting time interval information of each rebounding of the to-be-detected table tennis ball, and transmitting the time interval information to the controller; the controller calculates and generates a speed-time change relation graph of the to-be-detected table tennis ball according to the time interval information, and compares the speed-time change relation graph with the pre-training model to obtain a comparison result of the to-be-detected table tennis ball; if the comparison result is smaller than or equal to the set error value, the to-be-detected table tennis ball is judged to be a qualified product; if the comparison result is greater than a set error value, determining that the to-be-detected table tennis ball is a defective product; and the controller controls the collecting and classifying mechanism to complete classified collection of the to-be-detected table tennis balls according to the judgment result. The invention further discloses a table tennis quality detection device.

Description

Technical Field

[0001] The invention relates to product quality detection technology, in particular to a table tennis ball quality detection method and device. Background Art

[0002] As the competitive level of table tennis continues to improve, the quality requirements for table tennis equipment, especially the balls used in competitions, have also increased. However, the existing technology lacks methods and equipment that can fully detect the performance indicators of table tennis balls online. The balls needed for table tennis competitions still rely on manual screening from a large number of products, which is inefficient, has a high false detection rate, and is difficult to ensure quality.

[0003] According to the latest T3 standard issued by the International Table Tennis Federation (ITTF), the quality assessment system for table tennis balls with a diameter of 40 mm is rigorous and complex, covering multiple aspects such as weight, roundness, eccentricity, hardness, and bouncing performance. Most of the existing technologies for testing table tennis balls only measure a certain performance of the table tennis balls, which often cannot fully reflect the quality of the table tennis balls. At the same time, most of the existing testing methods are static testing, which detects the quality of table tennis balls by manual visual inspection or squeezing the table tennis balls. However, table tennis balls are in a state of being hit during use in competitions, and the specific degree of influence of various performances of table tennis balls when they are in a static or dynamic state is different. At present, most of them are manually sorted after the quality inspection is completed, which wastes manpower and has low sorting efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a table tennis ball quality detection method and device in view of the above-mentioned defects of the prior art.

[0005] In order to achieve the above object, the present invention provides a table tennis ball quality detection method, which comprises the following steps:

[0006] S100, feeding the table tennis balls to be tested into a feeding mechanism, and transporting them to a projection mechanism in an orderly manner through the feeding mechanism;

[0007] S200, the projection mechanism projects the table tennis ball to be detected to the speed detection mechanism at a set speed, and the table tennis ball bounces multiple times in the speed detection mechanism;

[0008] S300, when the table tennis ball to be detected bounces in the speed detection mechanism, the speed detection mechanism detects and collects the time interval information of each bounce of the table tennis ball to be detected, and transmits it to the controller;

[0009] S400, the controller calculates and generates a speed-time relationship graph of the table tennis ball to be detected according to the time interval information, and compares it with a pre-trained model for table tennis ball quality detection to obtain a comparison result of the table tennis ball to be detected;

[0010] S500, if the comparison result is less than or equal to the set error value, the determination result is that the table tennis ball to be tested is a qualified product; if the comparison result is greater than the set error value, the determination result is that the table tennis ball to be tested is a defective product; and

[0011] S600: The controller controls the collection and classification mechanism to complete the classification and collection of the table tennis balls to be detected according to the determination result.

[0012] In the above table tennis ball quality inspection method, in step S100, the feeding mechanism adopts a push rod linear pushing structure or a dial wheel rotary feeding structure to realize the orderly delivery of the table tennis balls to be inspected.

[0013] In the above table tennis ball quality detection method, in step S200, the projection mechanism adopts a catapult structure, an intermittent pushing structure or a friction wheel projection structure to project the table tennis ball to be detected to the speed detection mechanism at a set speed.

[0014] In the above table tennis ball quality detection method, in step S300, the speed detection mechanism collects the time interval information of each bounce of the table tennis ball to be detected through an infrared detection module, an image capture module or a pressure detection module.

[0015] In the above table tennis ball quality detection method, in step S400, the controller calculates and generates a graph showing the relationship between the speed of the table tennis ball to be detected and the time according to the time interval information collected within a set time or a set number of times.

[0016] In order to better achieve the above-mentioned purpose, the present invention also provides a table tennis ball quality detection device, which includes:

[0017] Box;

[0018] A feeding mechanism, arranged at the top of the box body, for orderly conveying the table tennis balls to be tested;

[0019] A projection mechanism, arranged in the box corresponding to the feeding mechanism, for projecting the table tennis ball to be detected at a set speed;

[0020] A speed detection mechanism is arranged in the box corresponding to the projection mechanism, and the table tennis ball to be detected projected by the projection mechanism at a set speed bounces multiple times in the speed detection mechanism, and the speed detection mechanism is used to collect time interval information of each bounce of the table tennis ball to be detected;

[0021] a controller connected to the speed detection mechanism and receiving the time interval information collected by the speed detection mechanism, wherein the controller calculates and generates a speed-time variation relationship diagram of the table tennis ball to be detected according to the time interval information; a pre-trained model for table tennis ball quality detection is stored in the controller, wherein the controller compares the generated speed-time variation relationship diagram with the pre-trained model to obtain a comparison result of the table tennis ball to be detected, and determines whether the table tennis ball to be detected is a qualified product or a defective product according to the comparison result; and

[0022] The collecting and classifying mechanism is arranged in the box and below the speed detecting mechanism. The controller is connected to the collecting and classifying mechanism. The controller controls the collecting and classifying mechanism to complete the classified collection of the table tennis balls to be detected according to the determination result.

[0023] The above-mentioned table tennis ball quality detection device, wherein the feeding mechanism comprises:

[0024] The shell is provided with a feed inlet and an outlet respectively;

[0025] A feed pushing mechanism is installed in the housing corresponding to the feed inlet and the outlet; and

[0026] A feed rail is arranged at the outlet corresponding to the feed pushing mechanism. The width of the feed rail is adapted to the diameter of the ping-pong balls to be detected. The ping-pong balls to be detected are arranged sequentially in the feed rail and slide toward the projection mechanism in sequence along the feed rail.

[0027] The above-mentioned table tennis ball quality detection device, wherein the feeding and pushing mechanism includes a feeding motor and a windmill wheel, the feeding motor is connected to the windmill wheel and drives the windmill wheel to rotate, the windmill wheel is arranged corresponding to the feeding slide rail, and when the blades of the windmill wheel rotate, the table tennis ball to be detected is pushed into the feeding slide rail.

[0028] The above-mentioned table tennis ball quality detection device, wherein the projection mechanism is a friction wheel projection structure, comprises:

[0029] A bracket, supported and installed in the box;

[0030] a driving motor, mounted on the bracket; and

[0031] The friction wheels are arranged on the bracket corresponding to the end of the feed slide rail and are symmetrically arranged with the center line of the feed slide rail as the center. The spacing between the friction wheels is equal to the diameter of the table tennis ball to be tested; the friction wheels are connected to the drive motor through a transmission chain.

[0032] In the above-mentioned table tennis ball quality detection device, the speed detection mechanism collects the time interval information of each bounce of the table tennis ball to be detected through an infrared detection module, and the speed detection mechanism includes:

[0033] The rebound component includes a first rebound plate and a second rebound plate, which are respectively connected to corresponding detection motors through driving shafts, and the first rebound plate and the second rebound plate are arranged opposite to each other and have different heights; the detection motor drives the first rebound plate and the second rebound plate to rotate through the driving shaft to adjust the angle and control the movement direction of the table tennis ball to be detected; and

[0034] A plurality of infrared detection modules are arranged in the box and connected to the controller. The plurality of infrared detection modules are respectively located between the first rebound plate and the second rebound plate and have different heights.

[0035] The technical effects of the present invention are:

[0036] The present invention can perform dynamic and orderly detection on table tennis balls, and classify and collect table tennis balls of different qualities at the same time, with high detection accuracy, and can accurately reflect the motion state of table tennis balls, thereby meeting the demand for high-precision measurement; the false detection rate is effectively reduced, the detection efficiency is improved, and the detection quality is guaranteed.

[0037] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a working principle diagram of the present invention;

[0039] Figure 2 It is a structural schematic diagram of a table tennis ball quality detection device according to an embodiment of the present invention;

[0040] Figure 3 for Figure 2 Side view of

[0041] Figure 4 for Figure 2 A cross-sectional view of

[0042] Figure 5 It is a schematic diagram of the structure of a projection mechanism according to an embodiment of the present invention;

[0043] Figure 6 A schematic diagram of the friction wheel structure according to an embodiment of the present invention;

[0044] Figure 7 The figure is a schematic diagram of the structure of an infrared detection module according to an embodiment of the present invention.

[0045] Wherein, the reference numerals are:

[0046] 1 cabinet

[0047] 2 Feeding mechanism

[0048] 21 Shell

[0049] 22 Windmill wheel

[0050] 23 Feed motor

[0051] 24 Feed slide rails

[0052] 3 Projection mechanism

[0053] 31 Friction wheel

[0054] 311 friction wheel rubber ring

[0055] 312 Bushing

[0056] 313 Friction axle

[0057] 314 deep groove ball bearing

[0058] 32Fixtures

[0059] 33 driving wheel

[0060] 34 driven wheel

[0061] 35 belt

[0062] 36 drive motor

[0063] 37 bracket

[0064] 4Speed ​​detection mechanism

[0065] 41 First rebound board

[0066] 42 Second rebound board

[0067] 43 First detection motor

[0068] 44 Second detection motor

[0069] 45 First drive shaft

[0070] 46 Second drive shaft

[0071] 47 Infrared detection module

[0072] 471 infrared transmitter

[0073] 472 infrared receiver

[0074] 5 Collection and classification agencies

[0075] 51 Chute

[0076] 52 flip board

[0077] 53 Classification Motor

[0078] 54 Classification Drive Shaft

[0079] 55 First Collection Box

[0080] 56 Second Collection Box

[0081] 6 Controller DETAILED DESCRIPTION

[0082] The structural principle and working principle of the present invention are described in detail below in conjunction with the accompanying drawings:

[0083] See also Figure 1 , Figure 1 The table tennis ball quality detection method of the present invention comprises the following steps:

[0084] Step S100, feeding the table tennis balls to be tested into the feeding mechanism 2, and transporting them to the projection mechanism 3 in an orderly manner through the feeding mechanism 2. The feeding mechanism 2 can adopt a push rod linear pushing structure or a dial wheel rotary sending structure to realize the orderly transportation of the table tennis balls to be tested;

[0085] Step S200, the projection mechanism 3 projects the table tennis ball to be detected to the speed detection mechanism 4 at a set speed, and the table tennis ball bounces multiple times in the speed detection mechanism 4; the projection mechanism 3 can adopt an ejection structure, an intermittent pushing structure or a friction wheel projection structure to project the table tennis ball to be detected to the speed detection mechanism 4 at a set speed;

[0086] Step S300: When the table tennis ball to be detected bounces in the speed detection mechanism 4, the speed detection mechanism 4 detects and collects the time interval information of each bounce of the table tennis ball to be detected, and transmits it to the controller 6; the speed detection mechanism 4 can collect the time interval information of each bounce of the table tennis ball to be detected through the infrared detection module 47, the image capture module or the pressure detection module;

[0087] Step S400: the controller 6 calculates and generates a graph showing a relationship between the speed of the table tennis ball to be detected and the time according to the time interval information, and compares the graph with the pre-trained model for table tennis ball quality detection to obtain a comparison result of the table tennis ball to be detected; the controller 6 can calculate and generate a graph showing a relationship between the speed of the table tennis ball to be detected and the time according to the time interval information collected within a set time or a set number of times;

[0088] Step S500: If the comparison result is less than or equal to the set error value, the determination result is that the table tennis ball to be tested is a qualified product; if the comparison result is greater than the set error value, the determination result is that the table tennis ball to be tested is a defective product; and

[0089] Step S600: The controller 6 controls the collection and classification mechanism 5 to complete the classification and collection of the table tennis balls to be detected according to the determination result.

[0090] See also Figure 2-Figure 4 , Figure 2 is a schematic structural diagram of an embodiment of the present invention, Figure 3 for Figure 2 Side view of Figure 4 for Figure 2 The table tennis ball quality detection device of the present invention comprises: a box body 1; a feeding mechanism 2, which is arranged at the top of the box body 1 and is used to orderly convey the table tennis balls to be detected; a projection mechanism 3, which is arranged in the box body 1 corresponding to the feeding mechanism 2 and is used to project the table tennis balls to be detected at a set speed; a speed detection mechanism 4, which is arranged in the box body 1 corresponding to the projection mechanism 3, and the table tennis balls to be detected projected by the projection mechanism 3 at a set speed bounce multiple times in the speed detection mechanism 4, and the speed detection mechanism 4 is used to collect the time interval information of each bounce of the table tennis balls to be detected; a controller 6, which is connected to the speed detection mechanism 4 and receives the time interval information collected by the speed detection mechanism 4. information, the controller 6 calculates and generates a speed-time variation relationship diagram of the table tennis ball to be detected according to the time interval information; the controller 6 stores a pre-trained model for table tennis ball quality detection, the controller 6 compares the generated speed-time variation relationship diagram with the pre-trained model to obtain a comparison result of the table tennis ball to be detected, and determines whether the table tennis ball to be detected is a qualified product or a defective product according to the comparison result; and a collection and classification mechanism 5 is arranged in the box 1 and located below the speed detection mechanism 4, the controller 6 is connected to the collection and classification mechanism 5, and the controller 6 controls the collection and classification mechanism 5 to complete the classification and collection of the table tennis balls to be detected according to the determination result.

[0091] In this embodiment, the feeding mechanism 2 includes: a shell 21, which is respectively provided with a feeding inlet and an outlet; a feeding pushing mechanism, which is installed in the shell 21 corresponding to the feeding inlet and the outlet; and a feeding slide rail 24, which is arranged at the outlet corresponding to the feeding pushing mechanism, and the width of the feeding slide rail 24 is adapted to the diameter of the ping-pong ball to be detected. The ping-pong ball to be detected is arranged sequentially in the feeding slide rail 24, and slides toward the projection mechanism 3 in sequence along the feeding slide rail 24.

[0092] Among them, the feeding and pushing mechanism includes a windmill wheel 22 and a feeding motor 23. The feeding motor 23 is connected to the windmill wheel 22 and drives the windmill wheel 22 to rotate. The windmill wheel 22 is arranged corresponding to the feeding slide rail 24. When the blades of the windmill wheel 22 rotate, the table tennis ball to be tested is pushed into the feeding slide rail 24.

[0093] See also Figure 4 In this embodiment, the collection and classification mechanism 5 includes: an inclined slot 51, which is fixed around the inner wall of the box body 1 and is hollow in the middle; a flip plate 52, which is connected to a classification motor 53 through a classification drive shaft 54 ​​and is located in the hollow part of the inclined slot 51, and the length and width of the flip plate 52 are adapted to the length and width of the hollow part of the inclined slot 51; the classification motor 53 is connected to the controller 6; and a collection component, including a first collection box 55 and a second collection box 56, which are arranged at the bottom of the box body 1 corresponding to the left and right ends of the flip plate 52, and are symmetrically arranged with the axis of the classification drive shaft 54 ​​as the center line. The table tennis ball to be detected enters the corresponding collection box after being determined.

[0094] See also Figure 5 , Figure 5 The schematic diagram of the structure of the projection mechanism 3 of an embodiment of the present invention. The projection mechanism 3 of this embodiment is a friction wheel projection structure, including: a bracket 37, which is supported and installed in the box body 1; a driving motor 36, which is installed on the bracket 37; a transmission chain, which connects the friction wheel 31 and the driving motor 36; and the friction wheel 31, which is arranged on the bracket 37 corresponding to the end of the feed slide 24, and is symmetrically arranged with the center line of the feed slide 24 as the center, the spacing between the friction wheels 31 is equal to the diameter of the table tennis ball to be detected, and the table tennis ball to be detected obtains a preset initial velocity between the friction wheels 31 and is projected toward the speed detection mechanism 4. Among them, the transmission chain includes: a driving wheel 33, which is connected to the driving motor 36; a driven wheel 34, which is connected to the friction wheel shaft 313, and the friction wheel shaft 313 is installed on the upper support part of the bracket 37 through a fixing member 32; and a belt 35, which is tensioned on the driving wheel 33 and the driven wheel 34. The driving motor 36 drives the friction wheel to rotate at a high speed through the transmission chain.

[0095] See also Figure 6 , Figure 6 The figure is a schematic diagram of the structure of the friction wheel 31 according to an embodiment of the present invention. The friction wheel 31 comprises: a friction wheel rubber ring 311, a sleeve 312, a friction wheel shaft 313 and a deep groove ball bearing 314. The friction wheel shaft 313 is arranged corresponding to the end of the feed slide rail 24 and is symmetrically arranged with the center line of the feed slide rail 24 as the center. The sleeve 312 is sleeved on the friction wheel shaft 313. The friction wheel rubber ring 311 is covered on the sleeve 312. The deep groove ball bearing 314 is installed on the friction wheel shaft 313 and abuts against the shoulder of the friction wheel shaft 313.

[0096] The projection mechanism 3 of this embodiment can also be implemented by other structures, such as an ejection structure or an intermittent pushing structure. Among them, the ejection structure may include, for example, a spring and a slider, the end of the spring is connected to the slider, and when the detection starts, the spring is in a compressed state. When the table tennis ball to be detected is transported to the projection mechanism 3 by the feeding mechanism 2, the spring is quickly released, driving the slider at its end to project the table tennis ball to be detected to the speed detection mechanism 4 at a preset speed. The intermittent pushing structure may include, for example, a stepping motor and a push rod, the push rod is connected to the driving shaft of the stepping motor, the stepping motor drives the push rod to intermittently move at a set time and speed, and the push rod projects the table tennis ball to be detected to the speed detection mechanism 4 at a preset speed.

[0097] See also Figure 7 , Figure 7 Schematic diagram of the structure of the infrared detection module 47 of an embodiment of the present invention. The speed detection mechanism 4 of this embodiment collects the time interval information of each rebound of the table tennis ball to be detected through the infrared detection module 47, and the speed detection mechanism 4 includes: a rebound component, including a first rebound plate 41 and a second rebound plate 42, which are respectively connected to the corresponding detection motor through a driving shaft, the first rebound plate 41 and the second rebound plate 42 are arranged oppositely and have different heights, wherein the driving shaft includes a first driving shaft 45 and a second driving shaft 46, and the detection motor includes a first detection motor 43 and a second detection motor 44; the detection motor drives the first rebound plate 41 and the second rebound plate 42 to rotate through the driving shaft to adjust the angle to control the movement direction of the table tennis ball to be detected; and a plurality of infrared detection modules 47, which are arranged in the box 1 and connected to the controller 6, and the plurality of infrared detection modules 47 are respectively located between the first rebound plate 41 and the second rebound plate 42 and have different heights, and the plurality of infrared detection modules 47 upload the collected time interval information to the controller 6, and at the same time, the table tennis ball to be detected enters the collection and classification mechanism 5 after rebounding between the first rebound plate 41 and the second rebound plate 42 for multiple times.

[0098] The speed detection mechanism 4 of this embodiment can also be implemented by other structures, such as an image capture module or a pressure detection module, etc. Among them, the pressure detection module can include, for example, a plurality of pressure sensors, which are arranged on the surface of the rebounding board. When the table tennis ball to be detected rebounds and hits the rebounding board, the pressure sensor detects the table tennis ball to be detected and collects the time interval information of each rebound of the table tennis ball to be detected; the pressure detection module is connected to the controller 6, and transmits the collected time interval information to the controller 6, and the controller 6 calculates and generates the speed-time variation relationship diagram of the table tennis ball to be detected according to the time interval information. The controller 6 stores a pre-trained model for table tennis quality detection, and the controller 6 compares the generated speed-time variation relationship diagram with the pre-trained model to obtain the comparison result of the table tennis ball to be detected, and determines whether the table tennis ball to be detected is a qualified product or a defective product according to the comparison result.

[0099] The core component of the image capture module may be a high-speed visual sensor, which is disposed in the box 1. The high-speed visual sensor is located between the first rebound plate 41 and the second rebound plate 42 to capture the rebound trajectory image of the table tennis ball to be detected; the image capture module is connected to the controller 6, and transmits the captured trajectory image to the controller 6. The controller 6 stores a pre-trained model for table tennis ball quality detection. The controller 6 compares the received trajectory image with the pre-trained model to obtain a comparison result of the table tennis ball to be detected, and determines whether the table tennis ball to be detected is a qualified product or a defective product based on the comparison result.

[0100] During operation, the ping-pong ball is first placed in the feeding mechanism 2, and the windmill wheel 22 transports the ping-pong ball to the feeding slide rail 24, and the ping-pong ball enters the projection mechanism 3 in the box body 1 along the feeding slide rail 24; the ping-pong ball is shot toward the first rebounding plate 41 at a preset speed through two high-speed rotating friction wheels 31 driven by the driving motor 36, and rebounds multiple times between the two rebounding plates; when the ping-pong ball moves back and forth between the two rebounding plates, the infrared transmitter 471 inside the box body 1 continuously emits infrared rays, and the infrared rays are reflected on the surface of the ping-pong ball, and the infrared receiver 472 receives the reflected infrared signal and converts it into an electrical signal to the controller 6; the controller 6 analyzes the data, calculates the trend image of the speed of the ping-pong ball over time, and compares it with the preset model; at the same time, after a preset detection time, the first rebounding plate 41 turns counterclockwise to make the ping-pong ball enter the receiving plate after impact. The classification device 5 is assembled. Since the inclined groove 51 has a certain curvature, it is ensured that the ping-pong ball can roll along the inclined groove 51 and fall on the upper end of the flip plate 52, waiting for the signal from the controller 6; if it is less than or equal to the set error value, it is determined to be a qualified product, and the controller 6 transmits the corresponding signal to the classification motor 53, and the classification motor 53 drives the classification drive shaft 54 ​​to drive the flip plate 52 to flip counterclockwise. After the ping-pong ball to be detected slides into the first collection box 55, the classification motor 53 drives the classification drive shaft 54 ​​to drive the flip plate 52 to reset; if it is greater than the set error value, it is determined to be a defective product, and the controller 6 transmits the corresponding signal to the classification motor 53 that controls the flip plate 52, and the classification motor 53 drives the classification drive shaft 54 ​​to drive the flip plate 52 to flip clockwise. After the ping-pong ball to be detected slides into the second collection box 56, the classification motor 53 drives the classification drive shaft 54 ​​to drive the flip plate 52 to reset.

[0101] The present invention allows table tennis balls to enter the windmill wheel of the feeding mechanism, thereby realizing orderly detection of multiple table tennis balls, thereby improving efficiency; the friction wheel is driven to rotate at high speed through synchronous wheel transmission, which can more effectively transmit motor power, reduce energy loss, and improve transmission efficiency; an infrared detection module is adopted, which is based on the Doppler effect and calculates the object speed by measuring the frequency change of reflected or scattered infrared rays. This measurement method has high accuracy, can accurately reflect the movement state of the table tennis balls, and can meet the needs of high-precision measurement; through a collection and classification device, table tennis balls with qualified quality and unqualified quality are separated, which is convenient for collection, and the collection box is fixed by a slide rail at the bottom of the box body, which is convenient for taking the collection box.

[0102] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A table tennis ball quality detection method, characterized in that: The steps include: S100, feeding the table tennis balls to be tested into a feeding mechanism, and transporting them to a projection mechanism in an orderly manner through the feeding mechanism; S200, the projection mechanism projects the table tennis ball to be detected to the speed detection mechanism at a set speed, and the table tennis ball bounces multiple times in the speed detection mechanism; S300, when the table tennis ball to be detected bounces in the speed detection mechanism, the speed detection mechanism detects and collects the time interval information of each bounce of the table tennis ball to be detected, and transmits it to the controller; S400, the controller calculates and generates a speed-time relationship graph of the table tennis ball to be detected according to the time interval information, and compares it with a pre-trained model for table tennis ball quality detection to obtain a comparison result of the table tennis ball to be detected; S500: If the comparison result is less than or equal to the set error value, the result of the determination is that the table tennis ball to be tested is a qualified product; If the comparison result is greater than the set error value, the determination result is that the table tennis ball to be tested is a defective product; as well as S600: The controller controls the collection and classification mechanism to complete the classification and collection of the table tennis balls to be detected according to the determination result.

2. The table tennis ball quality detection method as claimed in claim 1, characterized in that: In step S100, the feeding mechanism adopts a push rod linear pushing structure or a dial wheel rotary feeding structure to realize the orderly conveyance of the table tennis balls to be tested.

3. The table tennis ball quality detection method as claimed in claim 1, characterized in that: In step S200, the projection mechanism adopts a launching structure, an intermittent pushing structure or a friction wheel projection structure to project the table tennis ball to be detected to the speed detection mechanism at a set speed.

4. The table tennis ball quality detection method as claimed in claim 1, characterized in that: In step S300, the speed detection mechanism collects the time interval information of each bounce of the table tennis ball to be detected through an infrared detection module, an image capture module or a pressure detection module.

5. The table tennis ball quality detection method according to claim 1, characterized in that: In step S400, the controller calculates and generates a graph showing the relationship between the speed of the table tennis ball to be detected and the time according to the time interval information collected within a set time or a set number of times.

6. A table tennis ball quality detection device, characterized in that: include: Box; A feeding mechanism, arranged at the top of the box body, for orderly conveying the table tennis balls to be tested; A projection mechanism, arranged in the box corresponding to the feeding mechanism, for projecting the table tennis ball to be detected at a set speed; A speed detection mechanism is arranged in the box corresponding to the projection mechanism, and the table tennis ball to be detected projected by the projection mechanism at a set speed bounces multiple times in the speed detection mechanism, and the speed detection mechanism is used to collect time interval information of each bounce of the table tennis ball to be detected; A controller connected to the speed detection mechanism and receiving the time interval information collected by the speed detection mechanism, wherein the controller calculates and generates a speed-time variation relationship diagram of the table tennis ball to be detected according to the time interval information; The controller stores a pre-trained model for table tennis ball quality detection, and the controller compares the generated speed-time variation relationship diagram with the pre-trained model to obtain a comparison result of the table tennis ball to be detected, and determines whether the table tennis ball to be detected is a qualified product or a defective product according to the comparison result; as well as The collecting and classifying mechanism is arranged in the box and below the speed detecting mechanism. The controller is connected to the collecting and classifying mechanism. The controller controls the collecting and classifying mechanism to complete the classified collection of the table tennis balls to be detected according to the determination result.

7. The table tennis ball quality detection device according to claim 6, characterized in that: The feeding mechanism comprises: The shell is provided with a feed inlet and an outlet respectively; A feed pushing mechanism is installed in the housing corresponding to the feed inlet and the outlet; and A feed rail is arranged at the outlet corresponding to the feed pushing mechanism. The width of the feed rail is adapted to the diameter of the ping-pong balls to be detected. The ping-pong balls to be detected are arranged sequentially in the feed rail and slide toward the projection mechanism in sequence along the feed rail.

8. The table tennis ball quality detection device according to claim 7, characterized in that: The feeding and pushing mechanism includes a feeding motor and a windmill wheel. The feeding motor is connected to the windmill wheel and drives the windmill wheel to rotate. The windmill wheel is arranged corresponding to the feeding slide rail. When the blades of the windmill wheel rotate, the table tennis ball to be detected is pushed into the feeding slide rail.

9. The table tennis ball quality detection device according to claim 7, characterized in that: The projection mechanism is a friction wheel projection structure, comprising: A bracket, supported and installed in the box; a driving motor, mounted on the bracket; and The friction wheels are arranged on the bracket corresponding to the end of the feed slide rail and are symmetrically arranged with the center line of the feed slide rail as the center. The spacing between the friction wheels is equal to the diameter of the table tennis ball to be tested; the friction wheels are connected to the drive motor through a transmission chain.

10. The table tennis ball quality detection device according to claim 6, characterized in that: The speed detection mechanism collects the time interval information of each bounce of the table tennis ball to be detected through an infrared detection module, and the speed detection mechanism includes: The rebound component includes a first rebound plate and a second rebound plate, which are respectively connected to corresponding detection motors through driving shafts, and the first rebound plate and the second rebound plate are arranged opposite to each other and have different heights; the detection motor drives the first rebound plate and the second rebound plate to rotate through the driving shaft to adjust the angle and control the movement direction of the table tennis ball to be detected; and A plurality of infrared detection modules are arranged in the box and connected to the controller. The plurality of infrared detection modules are respectively located between the first rebound plate and the second rebound plate and have different heights.

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