Electromechanical Braking for Controlled Descent Safety
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Solution Overview
Problem
Existing descent control devices, such as standard ropes, pose significant safety risks for untrained individuals and even trained responders in emergency situations, particularly during fires, due to the need for rappelling expertise and potential equipment limitations.
Innovation Solution
A portable controlled descent device incorporating an electrical generator powered by the weight being lowered, featuring an electromechanical braking system with a magnetic generator and planetary gearing to regulate descent rate, allowing for automatic operation without hand braking and adaptable to various user weights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard descent rope is used for escape from elevated positions, then the device is simple and requires no external power source, but it is very dangerous for untrained individuals and provides no controlled descent capability
Solution Approach 1:
The system uses the user's own body weight as the power source to drive the generator and braking mechanism, eliminating the need for external power sources. The gravitational potential energy converted during descent automatically powers the control system, making the device self-sufficient and safe without adding significant complexity.
Solution Approach 2:
The patent replaces traditional mechanical friction-based braking systems with an electromagnetic braking system. The generator creates electromagnetic resistance that automatically controls descent speed, providing more reliable and controllable braking that adapts to different user weights without requiring manual adjustment.
2Reliability
If an electromechanical braking system with generator is implemented, then controlled descent is achieved and safety is improved, but the device becomes more complex and bulky
Solution Approach 1:
The generator serves multiple functions simultaneously: it provides electromagnetic braking force to control descent speed, generates electrical power for the system, and can potentially power additional safety features. This multi-functionality reduces the need for separate components, managing overall device complexity while maintaining controlled descent capability.
3Adaptability or versatility
If the braking system is adjusted for different user weights, then adaptability is improved, but the operation becomes more complex requiring adjustments
Solution Approach 1:
The electromagnetic braking system dynamically adapts to different user weights through the generator's inherent characteristics. As the user's weight and descent speed vary, the electromagnetic resistance automatically adjusts to maintain controlled descent, eliminating the need for manual adjustments and keeping the system easy to operate across different users.
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 device provides a safe, compact, and cost-effective means for controlled descent, independent of user weight, enabling safe exit from elevated positions without requiring external power sources, thus enhancing safety in emergency situations.
Implementation Method 1
A magnet and coil assembly to generate electrical current
Implementation Method 2
featuring an electromechanical braking system with a magnetic generator
Data Source
AI summary
Embodiments include a system for controlled release of a descent line that can include a shaft secured to a first end of a descent line. Embodiments can include a magnet cradle housing fixedly coupled with the shaft, a first magnet retained by the magnet cradle housing, a coil assembly secured in magnetic proximity to the magnet assembly to generate an electric current by magnetic interaction with the magnet when the shaft is rotated. Embodiments can include a braking assembly powered by the magnet and coil assembly such that the decent of a user is slowed to a safe rate of speed.