Impact Detection Device Using Piezoelectric Sensor on Shaft
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Solution Overview
Problem
Existing golf club impact detection systems are complex and cumbersome, requiring multiple sensors to accurately determine the timing of impact, which complicates the device structure and processing.
Innovation Solution
A simplified impact detection device is attached to the columnar portion of sports equipment, using a sensor element with piezoelectric properties to detect twisting and generate a voltage signal, allowing for accurate timing detection of impact through a feature data extraction unit and communication with a reception-side device for analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors are used to detect impact timing, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts the impact detection function from a multi-sensor system and implements it using a single sensor attached to the columnar portion. By placing one sensor on the shaft and using temporal change analysis of its output signal, the system achieves impact timing detection without requiring multiple sensors at different locations, thus reducing device complexity while maintaining measurement precision.
2Measurement precision
If multiple sensors are used to detect impact timing, then measurement precision is improved, but processing complexity increases
Solution Approach 1:
The patent simplifies signal processing by extracting impact timing information from the temporal changes of a single sensor's output signal. Instead of integrating and synchronizing data from multiple sensors, the system analyzes the time variation of one sensor's signal to detect when the hitting portion receives external pressure, significantly reducing processing complexity.
3Measurement precision
If a sensor is attached to the hitting portion, then impact detection accuracy is improved, but device weight increases
Solution Approach 1:
The patent uses the columnar portion (shaft) as an intermediary to transmit impact information from the hitting portion to the sensor. Instead of attaching the sensor directly to the hitting portion, it is placed on the shaft where it can detect temporal changes in the signal caused by impact forces transmitted through the columnar structure, thereby reducing weight while maintaining detection accuracy.
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
The device enables accurate detection of impact timing with a simple structure, providing users with feedback on their swing strength, timing, and habits, while maintaining a lightweight design that does not impede the user's experience.
Implementation Method 1
using a sensor element with piezoelectric properties to detect twisting and generate a voltage signal
Data Source
AI summary
An impact detection device includes a sensor that is attached to sports equipment including a columnar portion and a hitting portion connected to the columnar portion and is attached not at the hitting portion but at the columnar portion, and that is configured to output a sensor signal obtained by the sports equipment being swung, and a feature data extraction unit configured to detect, by using the sensor signal, from a temporal change of the sensor signal outputted by the hitting portion externally receiving pressure, timing at which the hitting portion externally receives the pressure.