Cableway Safety Device Position Detection
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Solution Overview
Problem
Safety devices in cableway systems can be obstructed during opening or closing, leading to potential injuries or damage, and may not ensure complete closure, compromising their functionality.
Innovation Solution
A sensor is used to detect the position of the actuating device at the end of the control device, allowing the system to stop and adjust the opening or closing force to prevent injuries or damage, ensuring complete operation of the safety device by checking its position and using a mechanism with a displacing member and a restoring force to manage the force applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the opening or closing force of the safety device is increased to ensure complete closure, then the reliability of safety device closure is improved, but the risk of injury to passengers or damage to objects increases
Solution Approach 1:
The sensor detects the position of the actuating device before the safety device completes its opening or closing motion. This preliminary detection allows the control system to prepare for potential obstructions by monitoring the actuating device's position in advance, enabling timely intervention to reduce closing force when obstructions are detected, thus preventing injury or damage while ensuring complete closure when safe
Solution Approach 2:
The sensor provides continuous feedback on the actuating device position to the control system during the opening and closing process. This feedback mechanism allows the system to monitor whether the actuating device reaches its prescribed position and adjust the closing force dynamically - maintaining high force for reliable closure when no obstruction is detected, and reducing force when the sensor indicates potential obstruction, thereby resolving the contradiction between closure reliability and passenger safety
2Object-affected harmful factors
If the opening or closing force is reduced to avoid injury or damage, then the safety of passengers is improved, but the reliability of complete closure is compromised
Solution Approach 1:
The sensor is positioned to detect the actuating device position before the safety device completes its motion. This early detection enables the control system to take preliminary action by reducing closing force in advance when obstructions are detected, preventing injury or damage while still allowing complete closure to occur when the path is clear, thus maintaining reliability without compromising safety
3Measurement precision
If the sensor is arranged in the immediate end region of the control device, then the detection precision is improved, but the response time to prevent injury or damage is reduced
Solution Approach 1:
The sensor is strategically positioned in the region of the end of the control device to detect the actuating device position in advance of the safety device's actual opening or closing motion. This preliminary detection provides sufficient lead time for the control system to respond and adjust closing force before the safety device completes its motion, preventing injury or damage while ensuring complete closure when safe
Data Source
AI summary
A chairlift has chairs for conveying persons. The chairs may be detachably fastened to a haulage and conveying cable. A closing bar can be moved from a closed position into an open position and is mechanically connected by way of a Bowden cable or the like to a lever which interacts with rails that are arranged at the entry and exit of a station of the cableway system. In order to check whether the closing bar is completely opened or closed, a sensor for detecting the position of the actuating device is arranged in the region of the end of the rails as viewed in the conveying direction of the cable.