Colored Glove Detection for Band Saw Blade Arrest
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Operators in the meat processing industry are at risk of serious injury from band saw blades due to exposure and potential contact during cutting operations, with existing guards leaving parts of the blade exposed and causing significant delays in injury prevention.
Innovation Solution
A safety apparatus using image processing and a clamping mechanism to detect a colored glove within a predefined three-dimensional sensing zone and arrest the blade's movement, ensuring the blade is stopped quickly to prevent injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guards are used to cover the blade, then operator protection is improved, but a significant section of the blade must remain exposed for larger cuts of meat and carcasses
Solution Approach 1:
The system performs preliminary detection of the operator's hand position using image processing cameras before the hand can contact the blade. The colored glove detection system is activated in advance to monitor the sensing zone, allowing the control system to prepare for potential blade contact and trigger the arresting mechanism before injury occurs.
Solution Approach 2:
A colored glove serves as an intermediary indicator that allows the optical detection system to distinguish the operator's hand from the meat being processed. The glove acts as a visual mediator between the operator's hand and the image processing system, enabling reliable detection without requiring direct contact sensors on the blade.
2Reliability
If emergency stop button is activated, then blade movement is stopped, but the motor may still undergo several rotations before being brought to a stop with continued resulting travel of the blade
Solution Approach 1:
The system performs preliminary detection of the operator's hand position using image processing cameras before the hand can contact the blade. The colored glove detection system is activated in advance to monitor the sensing zone, allowing the control system to prepare for potential blade contact and trigger the arresting mechanism before injury occurs.
Solution Approach 2:
The system replaces the traditional mechanical emergency stop mechanism with an optical detection and electronic control system. Image processing cameras detect the colored glove, and the control system electronically triggers the blade arresting mechanism, eliminating the delay inherent in mechanical emergency stop systems that require manual activation and mechanical engagement.
3Reliability
If image processing arrangement detects colored glove, then blade is arrested quickly, but device complexity increases
Solution Approach 1:
The system extracts only the essential function of hand detection by focusing on detecting a specific colored glove in a defined sensing zone, rather than attempting to detect all objects or complex hand gestures. This extraction of the core detection function simplifies the image processing requirements while maintaining effective safety monitoring.
Solution Approach 2:
The system uses color as a distinguishing feature to identify the operator's hand through the colored glove. This color-based detection method simplifies the image processing by providing a clear visual distinction between the operator's hand and the meat being processed, enabling reliable detection without complex pattern recognition algorithms.
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 solution effectively reduces the risk of amputation and severity of injuries by rapidly stopping the blade upon detecting the operator's glove, minimizing downtime and rehabilitation costs.
Implementation Method 1
an image processing arrangement operable to sense, within a predefined three-dimensional sensing zone, the presence of a glove worn by the operator which has a colour distinguishable by the image sensor from the colour of an object being cut by the blade
Data Source
AI summary
A safety apparatus for protecting an operator of an electrically powered saw from the blade during operation, the saw being of the type including a cutting table through which the blade passes, comprising: an image processing arrangement operable to sense, within a predefined three-dimensional sensing zone, the presence of a glove worn by the operator which has a colour distinguishable by the image sensor from the colour of an object being cut by the blade, the three-dimensional sensing zone being located in a cutting path of the blade; and an electronic controller communicable with the image sensor and operable to control an arresting mechanism to arrest movement of the blade responsive to the coloured glove being detected within the three-dimensional sensing zone.