255 results about "Tennis ball" patented technology

A method, apparatus, and system are disclosed for a robot with tennis ball gathering capabilities. A robot is configured to collect, transport, and deposit for storage tennis balls and other light-mobile sports equipment such as are used in table tennis, badminton, squash, pickleball, golf, basketball, dodgeball, floor hockey, indoor soccer, etc., to assist a player in practice without need for additional support personnel or manual ball retrieval by the player.

The embodiment of the invention discloses a real-time tennis ball speed calculation method and system based on a sliding window, and the method comprises the steps: carrying out the data buffering through employing a 35-frame first-in first-out buffer region based on a three-dimensional track point, screening effective points, calculating the instantaneous speed according to a Euclidean distance formula and an inter-frame time interval, and obtaining the real-time tennis ball speed. And through a three-frame sliding window average smooth speed curve, abnormal values are filtered by using a 10-220km / h threshold value, and ball speed calculation is realized. Through three-dimensional track points, ball speed calculation is realized through the steps of data buffering, effective point screening, instantaneous speed calculation, sliding window averaging, threshold filtering and the like. Compared with traditional single-point speed measurement, the precision is improved by about 20% by means of three-frame sliding window and three-dimensional coordinate calculation, and single-frame errors are reduced; the robustness in a complex scene is enhanced through data screening, window averaging and threshold filtering; the process is simple, the calculated amount is small, and the real-time requirement of occupational competitions is met; a fixed 35-frame buffer area optimizes resources, and memory redundancy is avoided.

The embodiment of the invention discloses a three-dimensional tennis track real-time reconstruction method and system based on multiple cameras, internal and external parameters and calibration results of the multiple cameras are utilized, respective two-dimensional pixel coordinates are converted into three-dimensional rays, and nodes are positioned in combination with a minimum distance algorithm. According to the embodiment of the invention, the real-time reconstruction of the three-dimensional track of the tennis ball is realized by virtue of the synchronous multi-camera two-dimensional image through the steps of camera accurate calibration, two-dimensional to three-dimensional ray conversion, intersection point calculation and screening, data output and the like. Compared with the prior art, the reconstruction precision is improved through accurate calibration and ray intersection screening; by means of multi-camera data synchronization and simple calculation process, data delay is reduced, and real-time performance is prominent; by means of multi-camera data redundancy and a placeholder mechanism, the robustness in a complex environment is enhanced; the output three-dimensional point data can directly support the functions of ball speed calculation and the like, and the expansibility is good.

The invention relates to the technical field of tennis recognition, in particular to a tennis recognition model based on adaptive illumination variation, which obtains an image brightness histogram by inputting an image, recognizes a region with uneven illumination distribution, and executes local contrast enhancement and global modeling, thereby effectively enhancing details of a target region, and improving the recognition accuracy. And the detectability of the tennis ball under weak light and complex light is improved. In combination with multi-scale feature extraction and classification identification, robust detection of tennis balls in different sizes and motion states is realized, and the method is suitable for multi-angle and light source interference scenes. And meanwhile, trajectory prediction and restoration are performed on detection results in continuous image frames by adopting a DeepSORT algorithm, so that the space-time continuity of target tracking is guaranteed, and target loss caused by detection interruption is avoided. The whole scheme integrates image enhancement, detection and tracking mechanisms, improves the accuracy and stability of tennis recognition under a dynamic illumination condition, and is suitable for a complex tennis outdoor competition environment.

The tennis ball launching device comprises a vehicle body, a transportation assembly and a launching assembly, the vehicle body is provided with a temporary storage bin, the temporary storage bin is used for storing tennis balls, the transportation assembly is arranged on the vehicle body, one end of the transportation assembly is communicated with the temporary storage bin, and therefore the tennis balls in the temporary storage bin can be transported through the transportation assembly; the launching assembly comprises a launching tube, a first launching part and a second launching part, the launching tube is arranged on the transportation assembly and communicates with the transportation assembly, and the launching tube can rotate around the width direction of the vehicle body relative to the vehicle body so as to adjust the launching angle of the launching tube; the first launching part and the second launching part are both arranged on the launching tube, at least parts of the first launching part and the second launching part are located in the launching tube, the first launching part is used for positioning a tennis ball, the second launching part is located on the side, away from the conveying assembly, of the first launching part, and the second launching part is used for accelerating the tennis ball. The tennis ball launching device has the advantages of being simple in structure, high in hit rate and the like.

A tennis ball serving robot and a tennis ball serving system. The tennis ball serving robot comprises a robot body (1), a ball collection basket (10), a controller (11), a ball feeding module (12), a ball launching module (13) and a direction module, wherein the controller (11) is configured to enter a customized ball serving mode in response to a customized ball serving instruction of a user; in the customized ball serving mode, the controller (11) controls, on the basis of received customized ball serving parameters, the ball feeding module (12), the ball launching module (13) and the direction module to work cooperatively, so as to realize the customized ball serving of tennis balls.

The utility model provides a tennis machine which comprises a tennis machine body, a goal module arranged on the upper side of the tennis machine body, a serving module arranged on the inner side of the tennis machine body, a camera shooting module and a processor, and the processor is in signal connection with the camera shooting module and is in driving connection with the goal module and the serving module. The first driving instruction is used for driving the goal module to execute the goal action, and the second driving instruction is used for driving the serving module to execute the serving action. According to the tennis machine, the processor is combined with the camera shooting module, instructions can be dynamically generated according to real-time image data, the requirement for manual operation is reduced, then the goal module and the serving module are accurately driven, the tennis machine can automatically adjust parameters such as the timing, the position and the angle of serving, and the service efficiency is improved. Automatic control of the tennis machine is achieved, and intelligence and interactivity of tennis training are greatly improved.

The invention discloses a rubber particle preparation method based on recycled tennis balls, an environment-friendly runway construction method and an environment-friendly runway, and belongs to the field of runway construction.The method comprises the following steps that Sa1, the recycled tennis balls with impurities removed are put into a smashing machine at a constant speed, and surface felt and a rubber inner core are smashed and separated through the smashing machine; sa2, disinfection and washing are carried out; sa3, separating the fibers from the rubber particles; sa4, naturally air-drying the fibers and the rubber particles; sa5, classifying and screening; and Sa6, classifying, sealing and storing. By the adoption of the rubber particle preparation method based on the recycled tennis balls, the environment-friendly runway construction method and the environment-friendly runway, vulcanized rubber resources in the waste tennis balls can be efficiently recycled, meanwhile, high-valued application of the resources is achieved through the following environment-friendly runway construction steps, and a complete technical closed loop of recycling, preparation and application is formed.

The invention discloses a real-time tennis serving score distinguishing method and device. The method comprises the steps that two-dimensional pixel coordinates of a tennis ball are recognized through synchronous frames of multiple cameras, three-dimensional coordinates of the tennis ball are constructed through a ray intersection method, a continuous three-dimensional coordinate sequence is analyzed, the frame interval is calculated according to the y-axis movement trend, and a serving starting point is determined; and then finding a height minimum value or an inflection point through a continuous three-dimensional coordinate sequence, and determining a ball serving drop point. And dynamically calculating the space coordinate range of the service area by combining the service starting point coordinate and the site reference point, distinguishing the service area boundary of a single-play mode or a double-play mode, determining the falling point state of the tennis ball according to the falling point and the service area boundary, and scoring the service party or the receiving party according to a scoring rule. According to the method, the y-axis change trend of the tennis motion is analyzed through the three-dimensional track data, and the serving starting point and the serving falling point can be accurately identified by utilizing the y-axis change trend, so that the accuracy and the efficiency of serving score judgment are greatly improved, and the fairness of a game is ensured.

The invention discloses a tennis serving recognition method and device based on a time interval, and the method comprises the steps: collecting video frames in parallel through a plurality of cameras, and carrying out the time alignment of the video frames, thereby obtaining a plurality of synchronous frames; recognizing two-dimensional pixel coordinates of the tennis ball in the multiple paths of synchronous frames, and constructing three-dimensional coordinates of the tennis ball in the space through a ray intersection method; analyzing the continuous three-dimensional coordinates of the tennis ball in the sliding window in the space, and judging the movement trend of the tennis ball on the y axis; if the motion trend on the y axis is continuous rising or falling, calculating the frame interval between the current frame and the last effective motion; finally, judging whether the frame interval is greater than an effective motion interval threshold value or not; if yes, new serving is judged, and the coordinates of the serving starting point are recorded. According to the method, the y-axis change trend of the tennis movement is analyzed through the multi-frame sliding window, the serving movement characteristics are accurately recognized in combination with the frame interval threshold value, serving and common hitting can be accurately distinguished according to the serving movement characteristics, and the misjudgment rate is effectively reduced.

Device for returning tennis balls to a ball throwing machine, with • a pipe system (20, 220) serving to collect tennis balls (4, 204) ejected by the ball throwing machine (5, 205) and returned by a player (3) over a net (2) consisting of at least one outer pipe (21) provided with at least one opening (23) and at least one inner pipe (22) rotatably mounted relative to it and provided with at least one opening (24); • a threshold ramp (10, 210) which has an ascending slope (11) and a slope (12) descending towards the pipe system (20, 220); • at least one rotary drive (25, 225) by which the pipe system (20, 220) can be converted, at least section by section, by rotating the respective inner pipe (22) from an open state enabling the receipt of tennis balls (4, 204) rolling over the threshold ramp (10, 210) to the pipe system (20, 220) into a closed state enclosing the received tennis balls (4, 204); and • a transport system (40, 240) via which the tennis balls (4, 204) collected in the pipe system (20, 220) can be transported to the ball throwing machine (5, 205).

The utility model discloses a tennis rubber mixing machine, which relates to the technical field of tennis ball production and comprises a rubber mixing machine main body, a first roller and a second roller are arranged in the rubber mixing machine main body, and a first transmission rod and a second transmission rod are arranged at one end of the second roller far away from the first roller. The cleaning cloth is arranged on the side, away from the first roller, of the second roller, the first transmission rod and the second transmission rod drive the cleaning cloth to rotate, then the cleaning cloth cleans the second roller, meanwhile, when the second roller is used, the hydraulic cylinder is started, the hydraulic cylinder drives the movable plate to move, and therefore the cleaning cloth can clean the second roller. The movable plate drives the first transmission rod and the second transmission rod to be far away from the second roller, so that the cleaning cloth is prevented from influencing normal use of the second roller, and the problems that a worker inconveniently cleans the round roller close to the inner side, and when the round roller close to the inner side is not thoroughly cleaned, the rubber mixing quality in subsequent use of the rubber mixing machine is influenced are solved.

The invention relates to the technical field of carts, and particularly discloses a folding tennis cart which comprises a bottom frame, mounting frames are fixedly mounted at the corners of the bottom frame, movable wheels are rotatably arranged on the mounting frames, an electric shear fork is arranged on the bottom frame, a transverse plate is arranged at the top of the electric shear fork, a tennis frame is arranged on the transverse plate, and the tennis frame is arranged on the tennis frame. A driving wheel is rotationally arranged on the side edge of the mounting frame, the rotating shaft end of the driving wheel and the rotating shaft end of the movable wheel are fixedly mounted, a driven wheel is rotationally arranged on the side edge of the tennis ball frame, and the driving wheel and the driven wheel are jointly sleeved with a belt in meshing transmission connection with the driving wheel and the driven wheel; according to the folding tennis cart, in the moving process of the cart, by means of linkage of a mechanical structure, tennis balls placed in the ball placing frame can be automatically arranged in order, the tedious step of manually arranging the tennis balls is omitted, the tennis balls are prevented from being stacked in a mess in the frame, the space of the ball placing frame is more reasonably utilized, and the loading capacity is guaranteed.

1. Name of the product in this design: Ping Pong Ball Retriever Net Frame. 2. Purpose of this design: For picking up balls, such as ping-pong balls. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention discloses a tennis ball collecting robot and a control method, system and equipment thereof, and the method comprises the steps: obtaining a coordinate data set of scattered tennis balls in a target area in response to a received ball collecting instruction; according to the coordinate data set, coordinates of a starting tennis ball are obtained, and the starting tennis ball is configured to be a tennis ball located at the edge of the scattered tennis ball; obtaining an initial path based on an improved nearest neighbor algorithm according to the coordinates of the initial tennis ball and the coordinate data set; and according to the initial path, eliminating path intersection by a local optimization algorithm to obtain an optimal path. According to the scheme, through an innovative mixed path planning algorithm, scattered tennis balls are collected within the shortest time, the collection efficiency is remarkably improved, and the energy consumption of the robot is reduced.

The utility model belongs to the technical field of ball picking devices, and particularly relates to a multipurpose ball picking frame which comprises a connecting frame and a ball picking frame body, the ball picking frame body comprises two ring discs, a plurality of connecting rods and longitudinal elastic pieces, fork-shaped supports are integrally formed on the inner sides of the ring discs, the inner sides of the ring discs are divided into a plurality of taking-out openings through the fork-shaped supports, and the connecting rods are connected with the longitudinal elastic pieces. The two ends of each connecting rod extend longitudinally and are detachably connected with the two ring discs respectively, the distance between every two adjacent connecting rods is smaller than the diameter of a tennis ball, the two ends of each longitudinal elastic piece extend longitudinally and are detachably connected with the two ring discs respectively, and each longitudinal elastic piece is located in the middle of the position between every two adjacent connecting rods. The fork-shaped support is further provided with a leakage-proof assembly. The ball picking frame is designed based on the size difference of tennis balls, golf balls and table tennis balls, so that the ball picking frame can be used for picking up the tennis balls, the golf balls and the table tennis balls, and is multipurpose.

The invention discloses ball serving equipment for physical education training, belongs to the technical field of physical training, and aims to solve the problems that continuous feeding is interrupted and impurity particles on the surface of a tennis ball splash to a training area at a relatively high speed due to friction clamping stagnation of the tennis ball in a funnel due to a stacking effect. The device comprises a moving vehicle and an adjusting seat arranged on one side of the moving vehicle, a launching cylinder is fixedly installed on one side of the adjusting seat, and a launching piece is arranged at one end of the launching cylinder. Through the double-pushing design that the launching piece is in linkage with an elastic jacking piece, the phenomena of accumulation clamping stagnation and bridging of tennis balls in a discharging piece are effectively broken through; in the ball pushing process of the pushing piece, impurities on the surfaces of the tennis balls are separated under the action of extrusion and friction and are collected into the collecting box in a centralized mode through the discharging holes, and the safety accidents that the impurities splash along with high-speed tennis ball launching, skin scratching, foreign matter entering eyes and the like are avoided.

Systems, methods, and computer-readable media are disclosed for autonomous tennis ball retrieval robots. Example robots include a housing comprising a ball inlet, a first wheel coupled to the housing, a ball collection portion coupled to the housing and configured to receive a plurality of balls, a first arm and a second arm removably coupled to the housing, where the first arm and the second arm together guide balls towards the ball inlet, a ball direction device configured to direct balls from the ball inlet to the ball collection portion, and a first sensor coupled to the first arm, where the autonomous tennis ball retrieval robot is configured to detect obstacles using the first sensor. The autonomous tennis ball retrieval robot may be configured to retrieve balls disposed in an ambient environment, and may be configured to be transported in a rolling mode using the first wheel.

Table tennis ball holder for table tennis players with a clip for attaching to a waistband or belt, characterized by its use for storing table tennis balls close to the body during matches or training. The ball holder consists of an elongated support structure with several adjacent holding segments, each segment featuring three elastic gripping fingers. Each holding segment can hold a 40 mm diameter table tennis ball thanks to its gripping fingers, which are positioned so that the balls are easily felt and accessible, allowing them to be removed with the fingers. Clips for attaching the holder to clothing or a belt are located on the back of the holding segments.

An AI-assisted mobile tennis training system integrates a motorized ball delivery device, multi-camera vision, autonomous navigation, and artificial intelligence for adaptive, data-driven player development. The device includes a motorized chassis, ball hopper, programmable ball delivery mechanism with variable spin, speed, and trajectory control, and a navigation subsystem employing omnidirectional wheels and localization based on court line recognition. A multi-camera array captures real-time player and ball movement, while onboard and remote computing modules process the data to determine player position, shot type, and performance metrics. An AI model predicts optimal ball delivery parameters and adapts drills based on player progress. A mobile application provides remote control, drill customization, and performance analytics. The system supports autonomous repositioning, safety monitoring, and individualized training plans, enabling dynamic, responsive, and efficient tennis practice for skill acquisition and improvement in both amateur and professional players.

1. Name of the product in this design: Go-kart ball collector (roller type). 2. Purpose of this design: This design is used to pick up balls such as baseballs, badminton shuttlecocks, and table tennis balls on a sports field. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The utility model belongs to the technical field of table tennis ball quality inspection, and provides a discharging mechanism of table tennis ball quality inspection equipment, which comprises a discharging driving device, a discharging sucker mechanism and a discharging collecting mechanism, and the discharging driving device and the discharging collecting mechanism are arranged on an equipment frame body of the table tennis ball quality inspection equipment. The driving end of the discharging driving device is connected with the discharging suction cup mechanism, the discharging driving device drives the discharging suction cup mechanism to move relative to the equipment frame body, and the discharging collecting mechanism is oppositely arranged below the discharging suction cup mechanism. The table tennis ball quality inspection device is reasonable in structural design, table tennis balls in a quality inspection placement area can be automatically transferred and collected, manual participation is reduced, and the automation degree is higher.

1. The name of the design product: Ping Pong ball picker. 2. The use of the design product: for picking up Ping Pong balls. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

1. Name of the product in this design: Packaging box (Ping Sa RS40+WTT Ping Pong ball). 2. Purpose of this design: This design is used for packaging ping-pong balls. 3. The main design features of this design are the shape, graphics, and color of the product. 4. The picture or photograph that best illustrates the key design features of this design: front view. 5. This design patent seeks to protect the colors of the design.

The utility model relates to the field of sports equipment, and discloses a table tennis table convenient to assemble a net rack, which comprises a table body, the top of the table body is provided with a net body, the side wall of the table body is provided with a moving groove, the inner wall of the moving groove is connected with a fixing frame in a sliding manner, the inner wall of the table body is provided with a positioning hole, and the fixing frame is provided with a positioning hole. A notch is formed in the outer wall of the fixing frame, a spring is fixedly connected to the inner wall of the notch, a pull block is fixedly connected to the end of the spring, a positioning rod is fixedly connected to the side wall of the pull block, a T-shaped groove is formed in the top of the fixing frame, and a fixing cylinder is arranged in the T-shaped groove. According to the table tennis table, by arranging the moving grooves, the positioning holes, the notches and other structures, the net body can be rapidly installed, meanwhile, the area of the two areas of the table body can be adjusted through movement of the net body, the core confrontation logic of the table tennis ball is reconstructed through spatial asymmetry, and the practicability and flexibility of the table tennis table are improved.

The invention discloses a rotating ball sender for table tennis training, which belongs to the technical field of table tennis serving machines and comprises a ball basket, a ball conveying pipe, an equipment shell, a table tennis conveying and cleaning structure, a diffusion ball serving device and a table fixing device. In order to solve the problems that when existing ball serving equipment serves balls, dust is attached to the surfaces of table tennis balls, external force is difficult to apply during ball serving, the ball serving track is fixed, the training effect is difficult to achieve and the like, the rotating ball serving machine for table tennis training is provided, in the table tennis ball conveying process, contact cleaning is conducted on the surfaces of the balls, and the ball serving angle is changed in a non-directional mode; the reactivity of athletes to the table tennis balls is effectively improved.

The utility model discloses an automatic ball suction device for a table tennis ball collecting net, which relates to the technical field of sports equipment and comprises a framework, a ball blocking net, a bottom plate, a ball collecting pocket and a suction mechanism. The ball blocking net comprises a front side net and a rear side net, the upper edge of the rear side net is higher than that of the front side net, and after the rear side net blocks table tennis balls, the table tennis balls fall between the front side net and the rear side net; the bottom plate is obliquely arranged between the lower ends of the front side net and the rear side net, and the lower edges of the front side net and the rear side net are connected with the front side edge and the rear side edge of the bottom plate respectively. The ball collecting pocket is arranged on the lower side of the bottom plate, an opening is formed in the upper end of the ball collecting pocket, and the opening is lower than or flush with the bottom plate; the suction mechanism is arranged on the side face of the framework and located above the ball collecting pocket. The table tennis ball collector is convenient for collecting table tennis balls during training, can reduce the time for picking up the table tennis balls by team members, and saves physical power.

This invention belongs to the field of sports training equipment and discloses a ping-pong ball distribution and delivery mechanism, which makes the ball distribution and delivery smooth and thus greatly improves the user experience. It includes a ball delivery channel and a ball delivery crank. The ball delivery channel extends vertically downwards or inclined downwards, and the passage area of ​​the ball delivery channel is larger than the large circle of the training ping-pong ball. The ball delivery crank is vertically rotatable relative to the ball delivery channel. Two ball-blocking protrusions are formed on the ball delivery crank. Both ball-blocking protrusions extend horizontally and are located inside the ball delivery channel. The plane containing the extension axis of the two ball-blocking protrusions is inclined relative to the extension direction of the ball delivery channel, and the vertical spacing of the two ball-blocking protrusions matches the diameter of the training ping-pong ball. The maximum distance between the edges of the two ball-blocking protrusions and the inner wall of the ball delivery channel is respectively used as the first ball-passing distance and the second ball-passing distance. The first ball-passing distance and the second ball-passing distance are respectively greater than and less than the diameter of the training ping-pong ball.

The utility model discloses a tennis ball serving mechanism, and belongs to the technical field of ball serving devices. The ball serving device comprises a ball serving box and an inner side plate, the ball serving box is provided with a ball serving opening, a ball hole is formed in a bottom plate of the ball serving box, shaft holes are formed in two side plates of the ball serving box, driving rollers are matched in the shaft holes, and second friction wheels are arranged on the driving rollers. The number of the inner side plates is two, the two inner side plates are connected through a U-shaped connecting plate, a driving roller is installed between the two inner side plates, a first friction wheel is arranged on the driving roller, and the inner side plates are installed on a shaft of the driving roller through bearing seats. Limiting shafts are installed on the side plates, arc-shaped guide grooves are formed in the inner side plates, and the limiting shafts are in sliding fit with the arc-shaped guide grooves. And a ball outlet is formed between the first friction wheel and the second friction wheel. Continuous ball serving is carried out through the friction wheel.