A desktop table tennis ball hitting mass quantification training device and method

Abstract

This invention discloses a desktop table tennis shot quality quantification training device and method, belonging to the technical field of sports training equipment. The device includes a fixed base, a shot response component, a measurement module, a data processing module, and a data feedback module. The measurement module includes at least one of a spin measurement submodule and a velocity measurement submodule, preferably both; the spin measurement submodule collects shot spin parameters, and the velocity measurement submodule collects velocity parameters of the moving component of the moving subunit. The data processing module simultaneously collects, aligns, and fuses the two types of parameters within a sampling window to generate shot quality quantification data, which is output by the data feedback module. This invention also provides a scheme containing only a single submodule and discloses the corresponding quantification method, training data feedback system, and computer-readable storage medium, which can simultaneously acquire spin and velocity parameters, output objective quantitative feedback, and improve the accuracy of training evaluation.

Description

Technical Field

[0001] This invention relates to the field of sports training equipment and motion parameter detection technology, specifically to a table tennis ball strike quality quantification training device and method. Background Technology

[0002] In table tennis training, the speed and spin of the ball after impact are key indicators for evaluating the quality of a shot. Speed ​​parameters reflect the power and rhythm control of the shot, while spin parameters reflect the friction and spin control of the shot.

[0003] Most existing desktop trainers focus on repetitive movement training, and training feedback mainly relies on the trainee's subjective feelings, lacking quantifiable and comparable objective evaluation criteria.

[0004] While some solutions can simulate spin or provide a single parameter display, they typically lack a coordinated mechanism for measuring spin, velocity, and processing the ball after it hits the ball, making it difficult to consistently output quantitative results that can be used for motion correction.

[0005] Therefore, a desktop training technology solution is needed that can simultaneously acquire spin and speed parameters after the trainee hits the ball, and output quantitative feedback through linkage processing. Summary of the Invention

[0006] To address the problems of difficulty in quantifying the quality of ball strikes, asynchronous parameter acquisition, and insufficient feedback consistency in existing technologies, this invention provides a desktop table tennis ball strike quality quantification training device and method.

[0007] The device of this invention includes a fixed base, a ball-hitting response component, a measurement module, a data processing module, and a data feedback module. The ball-hitting response component includes a movable subunit that can reciprocate along the ball-hitting direction, a rotating shaft that is drivenly connected to the movable subunit, and a rotatable ball unit mounted on the rotating shaft. The movable subunit can reciprocate along the ball-hitting direction, and its reciprocating stroke is limited to the impact stroke.

[0008] The measurement module includes at least one of a rotation measurement submodule and a velocity measurement submodule, preferably including both. The rotation measurement submodule is used to collect rotational parameters of the rotatable ball unit or rotation axis after the trainee hits the ball; the rotational parameters include at least the rotational angular velocity. The velocity measurement submodule is used to collect the velocity parameters of the moving component of the moving subunit after the trainee hits the ball.

[0009] The data processing module is electrically connected to the rotation measurement submodule, the velocity measurement submodule, and the data feedback module, respectively. It is used to trigger and establish a sampling window when a detection signal is received and the preset trigger conditions are met. Within the sampling window, the velocity parameters and rotation parameters are synchronously acquired, time-aligned, and fused, and the ball-hitting quality quantification data is output. The results are then output through the data feedback module.

[0010] In the subordinate technical solution, only the rotation measurement submodule may be configured without the velocity measurement submodule, or only the velocity measurement submodule may be configured without the rotation measurement submodule, to adapt to different training scenarios. The data processing steps are defined in the method claims.

[0011] Furthermore, the device may also include a desktop mounting component. This component, located at the bottom of the mounting base, allows for the detachable mounting of the device to the edge or surface of a desktop. The information feedback module can achieve real-time display and remote recording via a local display unit and a wireless communication unit.

[0012] The present invention also provides a method for quantifying the quality of a shot, a table tennis training data feedback system, and a computer-readable storage medium. Beneficial effects

[0013] This invention achieves synchronous acquisition and quantification of key parameters after a trainee hits the ball by working together with a rotation measurement submodule, a velocity measurement submodule, and a signal processing module, thereby improving the objectivity of training evaluation.

[0014] This invention preserves layered protection space within a single independent claim framework by defining the single rotational configuration and the single velocity configuration through dependent claims.

[0015] This invention differs from serve parameter control schemes by focusing on the actual feedback from trainees after hitting the ball, thus reducing the risk of overlap with serve control schemes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention, showing the connection relationship between the fixed base, the ball-hitting response component, the speed measurement submodule, the rotation measurement submodule, the data processing module, and the data feedback module.

[0017] Figure 2 This is a schematic diagram of the data processing flow of the signal processing module of the present invention, showing the trigger determination, sampling window, synchronous acquisition, time alignment and fusion calculation process.

[0018] Figure 3 This is a flowchart of the method for quantifying the quality of a shot according to the present invention, corresponding to steps S1 to S4.

[0019] Explanation of reference numerals in the attached diagram: 1-Fixed base; 2-Striking response component; 21-Moving sub-unit; 22-Rotation axis; 23-Rotable ball unit; 24-Return mechanism; 3-Velocity measurement sub-module; 4-Rotation measurement sub-module; 5-Data processing module; 6-Data feedback module. Detailed Implementation

[0020] The embodiments of the present invention will be further described below with reference to the accompanying drawings. These embodiments are used to explain the present invention, and are not intended to limit the scope of protection of the present invention.

[0021] Example 1 (Combination Scheme, see...) Figure 1 The device includes the ball-hitting response component as described in claim 1, a spin measurement submodule, a velocity measurement submodule, and a data processing module. The data processing module synchronously acquires and aligns velocity and spin parameters within a sampling window, outputting quantitative data on the ball-hitting quality.

[0022] Example 2 (Single Rotation Configuration): According to claim 2, the device is only configured with a rotation measurement submodule and not a speed measurement submodule, for rotation control-specific training.

[0023] Example 3 (Single Speed ​​Configuration): According to claim 3, the device is configured with only a speed measurement submodule and not a rotation measurement submodule, for strength and rhythm-specific training.

[0024] Example 4 (Data Processing, see...) Figure 2 The data processing module determines the start time of the hitting event based on a preset and adaptively updateable threshold of the hitting calibration data, and performs synchronous acquisition, time alignment and fusion processing.

[0025] Example 5 (Method flowchart, see...) Figure 3 The process is as follows: S1 triggers and establishes a sampling window; S2 synchronously acquires parameters; S3 fuses and processes the data and outputs quantized data; S4 completes the result output. In this method embodiment, data processing may sequentially include filtering and denoising, outlier removal, time alignment, and fusion calculation.

[0026] Without departing from the technical concept of this invention, those skilled in the art may make equivalent substitutions or modifications to the transmission form, sensor type, threshold strategy, communication protocol and fusion algorithm, all of which should fall within the protection scope of this invention.

Claims

1. A desktop table tennis shot quality quantification training device, comprising a fixed base, a shot response component, a measurement module, a data processing module, and a data feedback module; characterized in that, The ball-hitting response component includes at least one of a gliding subunit and a rotating subunit. The gliding subunit can reciprocate along a limited stroke in the direction of the hit. The rotating subunit consists of a rotating shaft and a rotatable ball unit, which cooperate to form a frictional rotational kinematic pair. The measurement module includes at least one of a rotation measurement submodule and a velocity measurement submodule. The rotation measurement submodule is used to collect rotational parameters such as the rotational angular velocity of the rotatable ball unit, and the velocity measurement submodule is used to collect the velocity parameters of the moving components of the gliding subunit. The data processing module is electrically connected to each measurement submodule and the data feedback module. It can establish a sampling window when the detection signal meets the preset trigger conditions, and synchronously collect, time-align, and fuse the velocity and rotation parameters to output quantitative data of the ball-hitting quality. The data feedback module is used to output quantitative data on the quality of the shot.

2. The tabletop table tennis shot quality quantification training device according to claim 1, characterized in that, The measurement module adopts a single detection configuration, with only a rotation measurement submodule for acquiring rotational parameters, or only a velocity measurement submodule for acquiring velocity parameters.

3. The tabletop table tennis shot quality quantification training device according to claim 1, characterized in that, The movable sub-unit is connected to the fixed base through a guide mechanism and has a built-in return mechanism. The return mechanism can drive the movable component of the movable sub-unit to automatically reset to the initial position after the ball is hit.

4. The tabletop table tennis shot quality quantification training device according to claim 1, characterized in that, The velocity measurement submodule adopts one of two schemes: A) It consists of a displacement detection unit and a time reference unit arranged in the direction of the ball's impact, and the data processing module calculates the velocity parameters based on the displacement-time data; B) It consists of an accelerometer installed on the moving component, and the data processing module calculates the velocity parameters by combining the acceleration data with zero-speed correction.

5. The tabletop table tennis shot quality quantification training device according to claim 1, characterized in that, The rotation measurement submodule employs one or more of an encoder, a Hall sensor, and an infrared sensor. When an infrared sensor is used, optical marks for pulse counting are set on the rotating shaft or the rotatable sphere unit.

6. The tabletop table tennis shot quality quantification training device according to claim 1, characterized in that, The data processing module determines the start time of the hitting event based on adaptively updatable hitting calibration data by using at least one threshold of pressure, acceleration, and displacement, and establishes a sampling window based on that time.

7. The tabletop table tennis shot quality quantification training device according to claim 1, characterized in that, The quantitative data on the quality of the shot includes at least speed level and spin level, and may also include stability index and comprehensive score; the data feedback module includes a local display unit and a wireless communication unit. The local display unit displays at least two quantitative data items, and the wireless communication unit transmits the data to the mobile terminal via Bluetooth Low Energy, Wi-Fi protocol or a combination thereof.

8. The tabletop table tennis shot quality quantification training device according to claim 1, characterized in that, The data processing module can perform statistical analysis on the quantitative data of multiple shots according to a preset statistical period, and generate a training report that includes speed stability trend and spin stability trend.

9. A method for quantifying the quality of table tennis strokes based on the device described in claim 1, characterized in that, Includes the following steps: S1. The data processing module detects ball-hitting events and establishes a sampling window after the preset triggering conditions are met. S2. Each measurement submodule synchronously collects the ball speed and spin parameters within the sampling window, unifying the time reference and sampling period; S3. The collected parameters are filtered and denoised, outlier is removed, and time is aligned, with the alignment error not exceeding one sampling period. Then, the data is fused through a preset weight model or machine learning model to output quantitative data of ball quality containing a comprehensive score and classify the quality level. S4. Output and display the quantitative data of the shot quality.

10. A table tennis training system and a computer-readable storage medium, characterized in that, The table tennis training system includes the device described in claim 1 and a mobile terminal. The device communicates with the mobile terminal through a wireless communication unit. The mobile terminal is used to receive, store, and visualize quantitative data of ball hitting and training reports. The computer-readable storage medium stores a computer program that, when executed by a processor, can implement the steps of the quantization training method as described in claim 9.

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