Dynamic Safety Zones Using Time-of-Flight Sensors
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Solution Overview
Problem
Traditional safety zones in industrial environments are static and inflexible, requiring costly and time-consuming adjustments to accommodate changing machine positions or operating modes, and do not account for the movements of operators or machines, leading to inefficient use of space and resources.
Innovation Solution
The implementation of dynamically adjustable safety zones using time-of-flight (TOF) sensors that detect the speed and direction of objects, allowing the safety zone to be automatically adjusted, thereby enabling or disabling equipment operations based on the proximity and movement of people or machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static safety zones are used to protect hazardous areas, then safety is ensured, but space requirements increase and productivity decreases
Solution Approach 1:
The patent applies dynamics by transforming static safety zones into dynamic safety zones that automatically adjust their boundaries based on real-time detection of object position, speed, and trajectory. The safety zone expands when objects approach at high speed and contracts when objects are stationary or moving away, thereby maintaining safety while reducing unnecessary space restrictions and improving productivity.
Solution Approach 2:
The patent changes the parameter of safety zone size from fixed to variable based on detection parameters such as object distance, speed, and direction. By continuously adjusting the safety zone parameters according to real-time conditions, the system ensures safety while minimizing space occupation and maximizing operational efficiency.
2Reliability
If static safety zones are used to protect hazardous areas, then safety is ensured, but device complexity and cost increase due to additional monitoring equipment
Solution Approach 1:
The patent makes the detection device universal by enabling it to perform multiple functions: detecting object position, calculating speed and trajectory, and dynamically controlling safety zone boundaries. This multi-functionality eliminates the need for separate monitoring equipment, reducing device complexity and cost while maintaining comprehensive safety monitoring.
Solution Approach 2:
The patent merges the functions of detection, calculation, and control into a single integrated system. The detection device combines object detection, speed calculation, trajectory analysis, and safety zone control functions, thereby reducing the number of components and simplifying the overall system architecture.
3Reliability
If static safety zones are used, then safety is ensured, but adaptability to changing machine positions or operating modes decreases
Solution Approach 1:
The patent applies dynamics by making the safety zone boundaries adaptive and changeable in real-time. The system continuously updates safety zone parameters based on current machine position, operating mode, and detected object characteristics, thereby maintaining high adaptability while ensuring safety under varying conditions.
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
This solution reduces the need for traditional monitoring equipment, minimizes safety distances, lowers space and building costs, and enhances productivity by allowing for shorter safety zones that adapt to the speed and direction of objects, thereby improving operational efficiency and safety in industrial settings.
Implementation Method 1
employing at least one time of flight sensor to determine a speed or a direction that an object approaches the operating zone
Data Source
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AI summary
Systems and methods are provided for defining a safety zone in an industrial automation environment. The method includes monitoring an object that approaches an operating zone where equipment is controlled within the operating zone. This includes determining the speed or direction that the object approaches the operating zone. The method includes dynamically adjusting a safety region in view of the determined speed or direction of the object and enabling or disabling the equipment within the operating zone based in part on the object entering the safety region.