Automated Door Safety Device with Dynamic Detection Region
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Automated door systems face challenges in ensuring safety due to fixed braking settings that do not adapt to changes in door leaf movement speed, leading to potential collisions with objects, especially when speed increases or decreases due to external factors like wind or manual actuation, as the detection field and braking distance are not dynamically adjusted.
Innovation Solution
A safety device with a sensor and control system that dynamically adjusts the detection region and braking force based on the current movement speed of the door leaf, ensuring safe braking and collision avoidance by adapting the detection geometry and braking distance in real-time, eliminating the need for manual calculation of maximum permissible door leaf movement speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detection field position is set mechanically (manually) by pivoting the sensor device, then the safety response is configured for a specific door leaf movement speed, but the coordination with the detection region becomes incorrect when the travel speed changes due to wind or manual actuation
Solution Approach 1:
The patent applies dynamics by making the detection field position adjustable during operation rather than fixed mechanically. The control device dynamically adapts the detection region parameters (position, size, orientation) to match the actual door leaf movement speed, which may vary due to wind or manual actuation. This dynamic adjustment ensures continuous coordination between the safety response and detection region across varying operating conditions.
Solution Approach 2:
The patent changes the parameters of the detection region (position, size, orientation) based on the actual door leaf movement speed. The control device receives speed information and adjusts the detection field parameters accordingly, transforming the static mechanical setting into a dynamic parameter-based system that adapts to varying speeds while maintaining safety coordination.
2Productivity
If the travel speed of the door leaf is increased, then the door system operates more efficiently, but the object may be detected too late and the door leaf will hit the object, resulting in a significant risk of injury
Solution Approach 1:
The patent implements feedback by having the control device receive actual door leaf movement speed information and use it to adjust the detection region parameters. This closed-loop feedback mechanism ensures that the detection field is optimally positioned and sized for the current speed, allowing objects to be detected at the appropriate distance to enable safe braking even at higher operating speeds.
Solution Approach 2:
The system performs preliminary action by pre-calculating and setting the appropriate detection region parameters based on the actual door leaf speed before a collision risk arises. The control device proactively adjusts the detection field configuration to ensure adequate detection distance and time, preventing late detection and potential collisions.
3Reliability
If the detection region is enlarged to detect objects earlier, then collision risk is reduced, but objects are detected too early and the door no longer opens correctly
Solution Approach 1:
The patent uses parameter changes to dynamically adjust the detection region size and position based on the actual door leaf movement speed. Rather than using a fixed enlarged detection region, the system optimizes the detection parameters for each operating condition, ensuring objects are detected at the appropriate distance that allows both collision prevention and correct door opening operation.
Data Source
AI summary
A safety device of an automated door system has a sensor device for arrangement on the door system such that a detection region of the sensor device covers a danger region of a door leaf using sensors. The sensor device detects the presence of an object within the detection region and has a control device for changinge the detection region on the basis of a current movement speed of the door leaf and/or to actuate the drive of the door leaf in the event of a safety response such that a braking distance of the door leaf is adapted to the current movement speed of the door leaf. The use of the safety device in a door drive with a drive unit for moving, or in a door system with, the associated door leaf an automated door system, and an operating method for the door system are also related.