Motion Analysis Device High-G Sensor Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motion analysis devices for sports like golf, tennis, and baseball lack accurate measurement of angular velocity and acceleration, particularly at high speeds, due to insufficient specifications of gyro sensors, which hinders precise swing analysis.
Innovation Solution
A motion analysis device equipped with a first sensor for measuring angular velocity of at least 2500 dps, a second sensor for measuring acceleration of at least 50 G, and a third sensor for measuring acceleration of at least 24 G, along with a processing unit that calculates posture and position using the sensor outputs, allowing for high-accuracy motion analysis by selecting appropriate sensor outputs based on acceleration magnitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single sensor with high measurement range is used, then the device can handle large acceleration values, but the measurement precision for normal motion decreases
Solution Approach 1:
The patent divides the acceleration measurement function into two separate sensors: a first acceleration sensor with a low measurement range for high-precision normal motion measurement, and a second acceleration sensor with a high measurement range for impact detection. This segmentation allows each sensor to be optimized for its specific function, resolving the contradiction between precision and range coverage.
Solution Approach 2:
The system dynamically switches between the first and second acceleration sensors based on the detected motion characteristics. The control unit determines which sensor to use by analyzing motion patterns, enabling the system to adapt to different acceleration magnitudes in real-time and maintain optimal measurement precision across varying conditions.
2Measurement precision
If the gyro sensor specification is not sufficiently high, then the device complexity is reduced, but the measurement precision of angular velocity decreases
Solution Approach 1:
The patent segments the sensor requirements by using a gyro sensor with moderate specifications (2500 dps) combined with multiple acceleration sensors of different ranges. This approach achieves high overall measurement precision without requiring an excessively complex or expensive sensor system, as the gyro sensor doesn't need ultra-high precision to compensate for the specialized acceleration sensors.
3Adaptability or versatility
If multiple sensors with different measurement ranges are used, then the adaptability to different motion speeds is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple sensors (first acceleration sensor, second acceleration sensor, and gyro sensor) into a single integrated sensor unit that can be mounted on motion equipment. This combination achieves comprehensive adaptability to different motion speeds while managing device complexity through unified sensor package design and coordinated control.
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
Enables high-accuracy analysis of swing motions by comprehending maximum angular velocity and acceleration, improving the evaluation of swing performance and timing of ball hitting.
Implementation Method 1
a first sensor that is able to measure angular velocity of at least 2500 dps
Implementation Method 2
a second sensor that is able to measure acceleration of at least 50 G; and a third sensor that is able to measure acceleration of at least 24 G
Data Source
AI summary
An motion analysis device includes a processing unit that performs motion analysis of a subject using an output of a sensor unit. The sensor unit includes an angular velocity sensor capable of measuring angular velocity of at least 2500 dps, a second acceleration sensor capable of measuring acceleration of at least 50 G, and a first acceleration sensor capable of measuring acceleration of at least 24 G. The sensor unit is mounted on at least one of a golf club and a subject. The processing unit calculates a posture of the sensor unit at the time of motion using the angular velocity measured by the angular velocity sensor, and performs selection of outputs of the second and first acceleration sensors according to acceleration applied at the time of the motion and calculates a position of the sensor unit during the motion using the selected acceleration of the sensor.