Visual Saw Safety Module for Blade Danger Zone Detection
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Solution Overview
Problem
Sawing devices pose safety risks to operators due to potential accidental contact with the saw blade during operation, necessitating improved safety mechanisms.
Innovation Solution
A sawing device equipped with a visual recognition system that defines safety and danger zones, using a visual element and controller to control the motor's operation based on target recognition and detection of objects in these zones, preventing accidental startup and stopping the motor when objects enter or are about to enter the danger zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a visual recognition system is added to the sawing device, then operation safety is improved, but device complexity increases
Solution Approach 1:
The visual recognition system is segmented into distinct functional modules: a visual element (camera) for capturing images, a controller for processing images and determining object positions, and a motor control system for executing safety actions. This modular segmentation allows the complex safety function to be implemented through coordinated simple components, improving reliability while managing complexity.
Solution Approach 2:
The controller acts as an intermediary between the visual element and the motor system. It receives images from the visual element, processes them to determine whether objects are in the danger zone, and then sends control signals to the motor system. This intermediary role enables the system to achieve intelligent safety control without requiring direct complex integration between sensing and actuation components.
2Reliability
If the visual element continuously monitors the danger zone, then safety protection is improved, but energy consumption increases
Solution Approach 1:
The visual element operates by periodically capturing images at specific moments rather than continuous monitoring. The controller triggers the visual element to capture images based on operational states (e.g., before motor startup, during operation when objects may enter the danger zone). This periodic imaging approach maintains safety protection while significantly reducing energy consumption compared to continuous video streaming or monitoring.
Data Source
AI summary
A sawing device includes a sawing machine and a safety module. The sawing machine has a worktable having a work plane, a saw blade box pivotably disposed on the worktable, a motor disposed on the saw blade box, and a saw blade connected with the motor and partially accommodated in the saw blade box. The safety module has a visual element disposed above the worktable and defining safety and danger zones for the work plane, and a controller electrically connected with the motor and the visual element. When the visual element captures that an object is located in the danger zone or determines that an object is about to enter the danger zone according to the movement trajectory of the object, the visual element transmits a brake signal to the controller to make the controller control the motor to stop operating. The sawing device improves the operation safety.