321 results about "Racketball" patented technology

The invention relates to a squash racquet handle grip comprising at least an external surface and an internal surface, wherein said external surface includes raised surface ridges, wherein said raised surfaces ridges define (a) a forefinger receiving recess for receiving an index finger of a user's hand, (b) a first position site for receiving a thumb of a user's hand, and (c) a second position site for receiving a middle finger of a user's hand; wherein said forefinger receiving recess is disposed on said external surface at an angle relative to both said first position site and said second position site; and wherein said grip is attachable to a squash racket handle.

The inventive fiber manufacturing process is particularly adapted for demanding applications such as sports racquets, including tennis racquets, badminton racquets and other sports applications. Because of the improved strength to weight ratio of components formed using the inventive method, a wide range of flexibility is achieved, allowing use of the inventive process to manufacture, for example, a fiber reinforced (for example, graphite) modular sports racquet, optionally provided with user- selectable weights and/ or handle replacements. From the standpoint of the player, this allows a racquet frame featuring self customization. From the standpoint of a retailer, the benefit provided is reduction of inventory.; The inventive fiber, for example graphite fiber) racquet frame is filled with a plastic foam and is formed using, for example, microencapsulation technology to time, generate and apply the pressure used to form the graphite composite material of which the racquet is comprised. This compares to the standard industry technique of air injection. The racquet is thus not hollow like conventional graphite racquets, and the walls therefore can be made thinner than those of existing graphite racquets still being of the same strength or being stronger, which gives the racquet exceptional performance. In addition, the overall dimensions of, for example the cross-section, of the racquet can also be reduced while still maintaining performance characteristics.

An accessory for rackets comprises means (1) for stable connection to a handle (M) of a racket (R) and contact means (2) for a user's hand (H), designed to identify the correct position of the hand (H) when gripping the racket (R) to perform strokes of a predetermined type, it being rigidly connectible the connecting means (1) and the contact means (2) to one another.

The invention relates to a method for manufacturing a badminton racket, belonging to the technical field of manufacturing of the badminton racket. The method comprises a first step of making different foaming materials into foaming prefabricated bodies respectively, a second step of cutting each foaming prefabricated body into a filling core respectively and combining the filling cores according to a preset sequence, a third step of rolling the filling cores after the combination into a carbon fiber prepreg to prepare a prefabricated long strip, a fourth step of connecting the prefabricated long strip with a T-shaped joint which is connected to a middle pipe, and putting the prefabricated long strip and the T-shaped joint into a mold, heating and preserving heat to enable the prefabricated long strip to be solidified and molded into the badminton racket, and butting adjacent heated and foaming filling cores in the prefabricated long strip without a gap in the solidifying and molding process, and a final step of preparing the badminton racket. With the combination of the research of an applicant, the whole performance of the badminton racket is improved obviously as the segmental filling and foaming technology is adopted, different foaming materials are filled at different parts of the badminton racket, and collocation of partial performances of the badminton racket is optimized rationally; and the whole method is simple and easy.

The invention relates to a training badminton racket, belonging to the technical field of the application of the sensor IOT (Internet of Things). A lithium ion battery and an axis acceleration sensor are arranged in a hole in the bottom of a racket handle, and the lithium ion battery supplies power to the axis acceleration sensor via an electric lead. During badminton training, along with the movement of the training badminton racket, the axis acceleration sensor converts sensed movement information into an electric signal and transmits the electric signal via a transmitting antenna, and an information processor receives the information via a receiving antenna, processes the information according to a set program, stores processed information, and inputs the processed information into a display. Thus specific data about applied force and a racket angle when a player strikes a shuttlecock can be displayed on the display. The player can know the specific data about the applied force and the racket angle in the whole striking process, and can adjust the applied force and control the racket angle well while striking the shuttlecock more easily according to the specific data.

The invention provides a method for judging a serving violation in a badminton serving process by using a computer open-source vision library (OpenCV) as an identification means, and relates to the fields of image processing, artificial intelligence and the like, aiming at the problems of excessive subjectivity judgment of serving hands and waist violations in the badminton serving process in a badminton court. The method comprises the following steps: acquiring a video image frame sequence of an athlete during serving, and performing motion detection preprocessing to achieve the purpose of improving the system efficiency; The method comprises the following steps: establishing a badminton image data set, extracting LBP digital image features, carrying out classifier training, and determining the position of a badminton during serving; Calculating the positive and negative of the relative angle of the racket during serving by using OpenCV to judge whether serving is passed or not; And establishing a relation equation between the badminton top image point and the vertical foot image point, and calculating the terrain clearance of the serving point to judge whether the serving is over-waisted or not. The image processing technology is mainly applied to the badminton court, and the method has the advantages of being simple in detection and practical.

A central tube for the badminton racket with high rigidity, elasticity and directional stability is made up of carbon yarn and aeronautic Ti wire mesh through making basic tube with carbon yarns and uniformly sticking said aeronautic Ti wire mesh on the surface of said basic tube.

The present invention relates to a method for manufacturing at least a portion of a sports racquet frame that comprises a step a) of providing a moldable tube structure containing a first inflatable bladder and a second inflatable bladder. The first and second inflatable bladders are positioned on opposite first and second regions of the moldable tube structure. At an intermediate region, the tube structure comprises one or more cross channels, which pass through the moldable tube structure. The method according to the present invention comprises also a further step b) of inserting said tube structure inside a mold forming a mold cavity of a desired shape. Mold members are inserted into the cross channels of the tube structure, so that the outer surface of the mold member faces the inner surface of the corresponding cross channel. The mold members have position and orientation that correspond to the position and orientation, along the string bed plane, of the string port holes, which are to be formed on said frame portion. The method, according to the present invention, comprises also a step c) of pressurizing the first and second bladders, so that the tube structure conforms to the shape of the mold, and heating the mold, so that the tube structure cures. The method, according to the present invention, comprises a further step d) of removing the cured tube structure from the mold cavity and removing the mold members from the cross channels.

The invention relates to linear high-energy plastic and a preparation method thereof. The linear high-energy plastic is prepared by immersing a linear supporting material into a heat-expandable composite resin material, wherein the heat-expandable composite resin material accounts for 10-70% of the total weight of the moulded linear high-energy plastic; the heat-expandable composite resin material comprises a hot-melt heat-expandable composite resin material and a solvent-based heat-expandable composite resin material. The linear high-energy plastic is applicable to moulding of a badminton racket, especially moulding of a middle tube of the badminton racket, the obtained badminton racket is plump in appearance and free of air bubbles therein, and the flexibility and the torque of the racket are taken into account; the preparation method is simple, low in cost and convenient in industrial application.

The invention provides a method and device for obtaining impact point spatio-temporal information. A low-cost and low-consumption sensor technology is utilized and combines an existing algorithm to obtain a space trajectory of racket actions, then an impact point moment and a corresponding space position are judged by calculating acceleration and angular acceleration change degree in a short time window, the hardware cost is not increased. The method is simple to achieve, and the technical problem that the space trajectory of a racket can be obtained by adopting a sensor-based identification technology and no means is provided to accurately determine a ball hitting point is surely solved.

According to one embodiment of the invention, a method for stringing a racket comprises inserting an end of a first string through a first grommet located along a frame of the racket, and re-inserting the end of the string through a second grommet. The second grommet is non-adjacent to the first grommet.

The invention relates to an intelligent table tennis bat which comprises a handle as well as a left base plate and a right base plate which are oppositely arranged on two sides of the handle, wherein a gap is formed between the left base plate and the right base plate; a circuit board is arranged inside the gap; a plurality of piezoelectric film sensors are uniformly adhered to the inner surfaces on one side, facing to the circuit board, of the left base plate and the right base plate; a main control MCU (Microprogrammed Control Unit), a signal conditioning circuit, a memory and a communication interface circuit are welded on the circuit board; the output ends of the piezoelectric film sensors are connected with the input end of the signal conditioning circuit; the output end of the signal conditioning circuit is connected with the input end of the main control MCU; the input end and output end of the main control MCU communicate with a host computer through the communication interface circuit. By adopting the intelligent table tennis bat, useful data information in a table tennis training process can be obtained, an objective data source is provided for improving the training quality in future, acquisition on force position, frequency and the like in hitting a ping-pong is achieved, and the intelligent table tennis bat has the characteristic of intelligence, and is low in power consumption and compact in structure.

The invention relates to a badminton racket. The badminton racket comprises a racket head and a racket rod, wherein the racket head comprises a racket frame and racket lines penetrating in the racket frame, the bottom of the racket frame is connected with the top of the racket rod through a connection part, the bottom of the racket rod is connected with a racket handle, and a plurality of air guiding grooves are formed at two sides of a position, close to the connection part, of the bottom of the racket frame along the longitudinal axis central line. The plurality of air guiding grooves do not affect the strength of the racket, are capable of effectively lowering the gravity center position of the badminton racket, and lowers the difficulty of swinging of the racket. Viridescent fluorescent powder is arranged on the racket lines of the badminton racket, is capable of indicating the position of the racket lines at night, and assists in accurate batting to improve the accuracy of batting. The badminton racket is made of special aluminum alloy, is good in batting feeling, good in vibration absorption, shuttlecock control and safety, and is suitable for being used by amateurs.

The invention provides a badminton spiking training device, which comprises a supporting frame, a badminton storage barrel, a batting racket, a rotating mechanism, a fan-shaped block, a pushing mechanism and a clamping mechanism, wherein the batting racket comprises a racket body and a racket rod, a shell is arranged between the racket rod and the racket body, and the shell is fixed to one end ofthe racket rod; the rotating mechanism is arranged in the shell, the output end of the rotating mechanism is connected with the racket body, and the rotating mechanism is used for driving the racket body to rotate around the racket rod; the fan-shaped block is fixed on the side wall of the supporting frame; the racket rod penetrates through the end part of a slot and is arranged on the supportingrod in a sleeving manner; the fan-shaped block is fixed on the supporting rod; the pushing mechanism is arranged on one side of the racket rod and used for pushing the racket rod to rotate around thesupporting rod; and the clamping mechanism is arranged on the supporting frame, located between the badminton storage barrel and the batting racket and used for clamping the badminton sliding out of abadminton outlet. The badminton spiking training device provided by the invention is suitable for being used in independent training, can simulate a real batting scene, and can also simulate a real racket swinging angle and a real racket swinging speed at the same time.

The invention discloses a return trajectory prediction method based on binocular vision perception of racket swinging and ball hitting actions. According to the method, the track of the racket beforebatting is used as an important basis for predicting the track of the shuttlecock, and the predicted time point is lifted from the time after the racket leaves the shuttlecock to the time before the racket touches the shuttlecock, so that more time is gained, and the quick response capability, batting point optimization capability, batting initiative and competitive level of the shuttlecock robotare improved. The method specifically comprises the following steps: 1, processing; first, a binocular camera is calibrated, denoising and distortion correction are carried out on the collected batting binocular image; identifying a motion area through a frame difference method; the shuttlecock and the racket are detected by using contour shape and area characteristics; eXTRACTING CORRESPONDING FEATURE POINTS, the method comprises the steps of matching binocular images according to an epipolar constraint principle, calculating parallax and depth of feature points, solving coordinates of the feature points, screening out off-site invalid moving targets according to boundary lines, calculating effective target motion parameters, taking the effective target motion parameters as neural networkinput for learning or prediction, and finally performing prediction calculation on medium and long term trajectories of return balls by utilizing Kalman filtering.

The invention discloses a tennis training method based on an attitude sensor, and belongs to the technical field of tennis equipment, and the method comprises the steps: S1, installing the attitude sensor on a tennis racket, and enabling the tennis racket to be provided with four attitude sensors R_1, R_2, R_3 and R_4; S2, arranging 16 posture sensors on the human body, which are BR_1, BR_2, BR_3,BR_4, BR_5, BR_6, BR_7, BL_1, BL_2, BL_3, BL_4, BL_5, BL_6, BL_7, BC_1 and BC_2 respectively; and S3, according to a racket and a posture sensor installed on the human body, detecting the posture ofthe human body during tennis, especially during tennis hitting, and the posture of the tennis racket, wherein the data information detected by the posture sensor comprises racket position information,speed information and acceleration information such as the waving track of the tennis racket and the orientation of the racket surface. The mechanical sensor module is used for collecting the stresscondition of a tennis ball falling point, and a standard tennis ball motion trail model is established according to stress analysis.

The invention discloses an ultra-light amorphous reinforced carbon fiber table tennis bat. The table tennis bat comprises a core plate, a carbon fiber layer and an amorphous alloy layer, wherein the core plate is mainly made of a foaming material; wherein the carbon fiber layer is coated outside the core plate; and the amorphous alloy layer is coated outside the carbon fiber layer. The surface ofthe table tennis bat is provided with a plurality of layers of amorphous alloy thin strips, the table tennis bat has the advantages of being high in elastic energy storage and moderate in modulus, thebat bottom plate can rapidly generate corresponding deformation during low impact, ball control is facilitated, and the defects that the ball control performance is poor and the hand feeling is poordue to the fact that the rigidity of a carbon fiber table tennis bat is too large are thoroughly overcome; and when the table tennis ball is subjected to large impact, the amorphous alloy has high-elasticity stored energy, so that the strength can be more effectively transmitted to the table tennis ball through a rubber sheet, the ball hitting efficiency is improved by over 30 percent, and the table tennis ball is particularly suitable for attacking methods such as loop balls and the like.

The present invention relates to a grip tape (2) and replacement grip tape for sports implements, like tennis, squash, racketball and badminton rackets, or clubs, as well as to a process for producing the same. The grip tape and replacement grip tape according to the present invention comprise a phase change material for dissipating and/or storing body heat of a player, so that the grip feeling for the player is improved considerably.

A method for making strings for sport rackets includes a step of extruding two wires of different materials and a step of twining the two wires along an axis to form a string. The string includes a core wire of a first material and a sun-wire of a second material is twined to the core wire. No acid-wash is needed and the two steps can be completed within one machine.

A tennis ball serving device solves the problems that an existing tennis ball serving device is single in function and low in application range, and different training modes cannot be adjusted according to the levels of different learners to improve the tennis technology of the learners. The tennis ball serving deviceincludes a lifting frame, an angle-adjustable launching cylinder, a driving shaft and a racket frame capable of rapidly swinging back and forth, an ejection rod is arranged in the launching cylinder, an ejection rack is fixedly connected to the ejection rod and meshed with an incomplete gear, the incomplete gear is coaxially and fixedly connected with a first regular polygon prism, and the first regular polygon prism is rotationally connected with a shell. The driving shaft is provided with a plurality of driving teeth which are circumferentially and uniformly distributed, the front ends of the driving teeth are flush, the lengths of the rear ends of the driving teeth are sequentially increased, and the first regular polygon prism is provided with an adjustable driven gear. The tennis ball serving device is diversified in function, different modes can be switched for training, the training difficulty and the training intensity can be adjusted according to the level of a learner, the application range is wide, and the tennis skill of the learner can be improved conveniently.

The invention provides a mesh-shaped racket connection piece and a connection method thereof. The connection piece is in a T shape. Two hollow assembling ends of a racket frame are connected with the two transverse ends of the connection piece. One end of a hollow middle pipe is connected with the vertical end of the connection piece. The sections of the transverse ends of the T-shaped connection piece are in a U shape. The two transverse ends of the T-shaped connection piece are opened. A communicating hole is formed in the bottoms of the middles of the transverse ends of the T-shaped connection piece and communicated with the tubular vertical end of the T-shaped connection piece. Two grooves are symmetrically formed in the end, connected with the vertical end of the connection piece, of the middle pipe. The weight of the connection piece is reduced, and therefore the linkage performance between the connection piece and the racket frame and the linkage performance between the connection piece and the middle pipe can be better, and the connection degree between the connection piece and the racket frame and the connection degree between the connection piece and the middle pipe are enhanced; in addition, the weight of a handle does not need to be increased, and therefore the gravity center of a racket can get closer to the handle, and the ball hitting force and accuracy are improved.