Impact-Counting Percussive Tool With Self-Powered Fatigue Tracking
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Solution Overview
Problem
Users of percussive tools, such as axes and hammers, face challenges in determining the cumulative number of impacts applied to the tool, making it difficult to assess material fatigue and prevent rupture, as manufacturers' estimates are not directly accessible to consumers.
Innovation Solution
A counter device is integrated into the tool, comprising a memory, microcontroller, energizer, and indicator, which tracks and displays the cumulative impact count, using energy harvesting technologies like piezoelectric or electromagnetic induction, and provides wireless access to the data, allowing users to monitor the tool's fatigue life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a counter device is integrated into the tool, then the user can track cumulative impact count and assess material fatigue, but the device complexity and manufacturing cost increase
Solution Approach 1:
The counter device is integrated into the tool by combining multiple functional components (energizer, memory, microcontroller, indicator) into a single unified system within the tool structure, allowing the tool to simultaneously perform its primary function and track cumulative impact count without requiring separate standalone devices
Solution Approach 2:
The counter device is designed to be self-powered through energy harvesting from the tool's own operational vibrations and impacts, eliminating the need for external power sources or battery replacements, thereby maintaining tool simplicity while enabling continuous impact monitoring
2Duration of action of stationary object
If energy harvesting technologies are used to power the counter device, then battery replacement is eliminated, but the amount of energy that needs to be harvested increases
Solution Approach 1:
The energy harvesting mechanism continuously converts vibrational energy from tool operation into electrical energy, accumulating power over time to charge the memory and microcontroller, ensuring uninterrupted operation of the counter device throughout the tool's service life without periodic recharging or battery replacement
Solution Approach 2:
The vibrations and mechanical stresses that contribute to tool fatigue are simultaneously harvested as useful mechanical energy through piezoelectric or electromagnetic transducers, converting what would be purely detrimental effects into the power source needed to sustain the counter device's operation
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 users to track the tool's impact history and receive alerts when material fatigue is imminent, enhancing user awareness and tool maintenance, thereby extending the tool's lifespan.
Implementation Method 1
using energy harvesting technologies like piezoelectric or electromagnetic induction
Implementation Method 2
using energy harvesting technologies like piezoelectric or electromagnetic induction
Data Source
AI summary
A tool includes a tool head with a utilization surface. The tool also includes a counter device responding to an impact applied to the utilization surface. The counter device has a memory, a microcontroller controlling operation of the counter device, an indicator, and an energizer connected to the microcontroller, which in response to the impact applied to the utilization surface, produces an electric current energizing the counter device to make a modification in the memory and provide information about the cumulative count of impacts in the memory via the indicator to a user.