Sports Device Speed Measurement Using Three-Axis Acceleration
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Solution Overview
Problem
Existing methods for measuring the speed of sports devices, such as using a stopwatch, are prone to significant errors, leading to low credibility in speed measurements.
Innovation Solution
A method and apparatus that acquire movement data from sensors on sports devices, calculate linear and tangential speeds based on three-axis accelerations, and combine these to improve the accuracy of speed measurements, which can be transmitted wirelessly for tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a stopwatch method is used to measure speed, then the measurement process is simple, but the measurement precision and credibility are low due to significant errors
Solution Approach 1:
The patent replaces the mechanical stopwatch-based measurement system with an electronic sensor system that collects movement data and calculates speed through computational processing. This substitution eliminates human reaction time errors and mechanical timer limitations, achieving high-precision speed measurement through electronic data acquisition and algorithmic calculation rather than mechanical timing devices.
Solution Approach 2:
The sports device itself performs the measurement function through integrated sensors and processing units. The device autonomously collects its own movement data, calculates linear and rotational speeds, and generates speed measurements without requiring external measurement equipment or operators. This self-measurement capability ensures consistent, high-precision data collection while simplifying the overall system architecture.
2Measurement precision
If only linear speed is measured, then the measurement process is simple, but the measurement precision is insufficient for rotational sports devices
Solution Approach 1:
The patent segments the speed measurement into two distinct components: linear speed calculation from translational acceleration and rotational speed calculation from angular acceleration. By separating these measurement tasks and processing them through dedicated calculation modules, the system achieves comprehensive speed measurement for rotational sports devices while maintaining clear, manageable computational processes for each component.
Solution Approach 2:
The patent extends the measurement from one-dimensional linear motion to two-dimensional motion by incorporating rotational movement analysis. The system measures both linear displacement along the axis of motion and rotational angle around the axis, combining these orthogonal dimensional measurements to provide complete speed characterization for rotational sports devices like rackets or clubs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the credibility and accuracy of speed measurements by considering both linear and rotational movements, improving the intelligent tracking capability of sports devices.
Implementation Method 1
acquiring movement data of the sports device during a process of tracking the sports device, the movement data being collected by a sensor disposed at a bottom of the sports device
Data Source
AI summary
The present disclosure relates to a method for measuring a speed of a sports device. The method includes: acquiring movement data of the sports device during a process of tracking the sports device, the movement data being collected by a sensor disposed at a bottom of the sports device; calculating a linear speed and a rotational speed of the sports device based on accelerations of three axes in the movement data; and combining the linear speed and the rotational speed to obtain a movement speed of the sports device. In addition, the present disclosure also provides an apparatus for measuring a speed of a sports device, which corresponds to the above method. The method and the apparatus for measuring a speed of a sports device can improve the credibility of the speed measurement of the sports device.