Power Tool Attention-Gated Wireless Safety Control
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Solution Overview
Problem
Power tools like nail driving machines and circular saws pose a risk of accidental operation when users are not consciously aware of their actions, leading to potential injuries or tool misuse due to divided attention during work.
Innovation Solution
A safety device comprising a tool and a mounting tool that communicate via a high-directional wireless signal, allowing operation only when the user is visually aware of the tool, using an infrared transmitter and receiver or imaging unit to ensure the user's attention is focused on the tool's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the user operates the tool while divided attention is given to another work, then productivity increases, but the risk of accidental operation and injury increases
Solution Approach 1:
The system continuously monitors the user's line of sight using an imaging unit and provides real-time feedback by detecting whether the user is looking at the tool. This feedback mechanism enables the controller to automatically adjust the tool's operational state based on the user's attention, allowing safe operation even when the user is engaged in other tasks.
Solution Approach 2:
The tool automatically monitors its own operational safety by using its built-in imaging unit to detect the user's line of sight. The system self-regulates by controlling the actuator based on whether the user is looking at the tool, eliminating the need for external safety monitoring devices or constant user vigilance.
2Power
If the tool is operated with high output power, then productivity increases, but the danger of harm from erroneous operation increases
Solution Approach 1:
The system performs preliminary safety verification by detecting the user's line of sight before allowing the high-power actuator to operate. The imaging unit continuously monitors whether the user is looking at the tool, and the controller prevents activation of the high-output actuator unless the user's attention is confirmed, thereby eliminating the danger associated with high-power operation.
3Ease of operation
If wireless communication is used for authentication and control, then ease of operation improves, but the complexity of the device increases
Solution Approach 1:
The imaging unit serves multiple functions: it captures images for line-of-sight detection, provides authentication verification, and enables communication between the tool and mounting tool. By making the imaging unit multi-functional, the system achieves wireless communication and safety monitoring capabilities without proportionally increasing device complexity.
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
Prevents accidental tool operation and misuse by ensuring the user's attention is directed towards the tool, thereby enhancing safety and preventing unintended actions during use.
Implementation Method 1
a transmission unit which is provided in one of the tool or the mounting tool, and transmits a wireless signal in which a transmission direction is set to have high directional characteristic with respect to a certain direction
Data Source
AI summary
A safety device includes: a tool which performs a predetermined operation through an operation of an actuator; a mounting tool worn by a user operating the tool; a transmission unit which is provided in one of the tool or the mounting tool, and transmits a wireless signal in which a transmission direction is set to have high directional characteristic with respect to a certain direction; a reception unit which is provided in the other of the tool or the mounting tool, and receives the wireless signal transmitted by the transmission unit; and a controller which controls the tool on a condition that the reception unit recognizes the wireless signal.