Bat Selection Device Using Moment of Inertia Estimation
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Solution Overview
Problem
Existing bat selection techniques require the use of a special bat and are complex, and they do not accurately consider the moment of inertia of the bat, leading to suboptimal bat selection for batters.
Innovation Solution
A bat selection device and method that estimates swing parameters for multiple bats with different moments of inertia, using input values such as hitting position and swing speed, to calculate an index parameter for selecting the most suitable bat based on ball launch speed and flying distance, without requiring a special bat or complex system configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a special bat is used for measurement and a complex system configuration is adopted, then bat selection accuracy can be improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent uses computational modeling to create a virtual copy of the bat's physical properties (moment of inertia, weight distribution) rather than requiring physical measurement tools. The system calculates swing parameters by inputting bat specifications and batter characteristics, then simulates the swing outcome to determine suitability, eliminating the need for special measurement bats and complex hardware setups.
Solution Approach 2:
The patent replaces mechanical measurement systems with computational algorithms. Instead of using physical sensors and special bats to measure swing characteristics, the system uses mathematical models to calculate swing parameters based on input data about the batter and bat specifications, thereby simplifying the overall system configuration.
2Device complexity
If moment of inertia is not considered in bat selection, then the selection process is simpler, but bat selection accuracy deteriorates
Solution Approach 1:
The patent explicitly incorporates moment of inertia as a key parameter in the bat selection model. The system calculates swing parameters based on the bat's moment of inertia, weight, and length, then uses these calculations to determine the most suitable bat for each batter. This parameter change from ignoring moment of inertia to including it directly improves selection accuracy without requiring overly complex measurements.
3Measurement precision
If multiple bats are swung by the batter for selection, then selection accuracy is improved, but the strain on the batter increases
Solution Approach 1:
The patent performs preliminary calculations of swing parameters and bat suitability before the actual selection process. By pre-calculating which bats are most suitable based on moment of inertia and other parameters, the system narrows down the options so the batter only needs to try a limited number of bats, reducing physical strain while maintaining high selection accuracy.
Data Source
AI summary
A bat selection device includes: a parameter input unit which receives an input of a swing parameter value relevant to swing of a batter, for each of at least two or more bats having moments of inertia different from one another swung by the batter at an object, of a plurality of bats; an estimation unit which estimates the swing parameter value corresponding to each of the plurality of bats based on each received swing parameter value; and a selection unit which calculates an index parameter value indicative of an index for selecting a bat suitable for the batter from the plurality of bats, for each of the plurality of bats, based on the estimated swing parameter value corresponding to the bat, and selects the bat suitable for the batter based on the index parameter values.