Rotation-Damping Helmet With Magnetic Shell-Liner Decoupling
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Solution Overview
Problem
Current helmets, particularly those designed for contact sports, fail to effectively dampen rotational forces that can lead to concussions, as they are primarily designed to address linear acceleration rather than rotational acceleration, which is a major cause of head trauma.
Innovation Solution
A helmet system utilizing magnetic fields to actively dampen rotational forces through magnetic repulsion, where an internal body with magnets oriented axially outwards interacts with an exterior shell, allowing the shell to pitch, roll, and yaw independently, and includes a sensor system to detect high-risk rotations, triggering an airbag or immobilizing structure to prevent dangerous head acceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the helmet shell is made rigid to resist breakage, then structural integrity is maintained, but rotational forces are transmitted directly to the head
Solution Approach 1:
The helmet structure is segmented into an outer shell and an inner liner that are mechanically separated by a rotation interface. This segmentation allows the outer shell to maintain rigid structural integrity for protection against breakage, while the inner liner is decoupled to independently rotate and reduce rotational force transmission to the head.
Solution Approach 2:
A rotation interface acts as an intermediary mechanism between the rigid outer shell and the inner liner. This interface allows controlled relative rotation between the two components, enabling the rigid shell to maintain its strength while preventing direct transmission of rotational forces to the head through the liner's independent rotation.
2Loss of energy
If passive foam materials are used for shock absorption, then impact energy is absorbed through deformation, but the duration of impact is too short to effectively reduce G-forces
Solution Approach 1:
The system transitions from passive, static foam deformation to active, dynamic rotation of the inner liner. The liner's rotation provides an additional mechanism for extending impact duration by converting linear impact energy into rotational motion, thereby lengthening the deceleration time and reducing peak G-forces transmitted to the head.
3Stability of the object's composition
If the internal body is fixed to the exterior shell, then structural stability is maintained, but the shell cannot rotate independently to dampen rotational forces
Solution Approach 1:
The helmet's internal and external structures are segmented into separate rotatable components. The inner liner and outer shell are disconnected at the rotation interface, allowing each to move independently. This segmentation maintains overall structural stability while enabling the inner liner to rotate independently to dampen rotational acceleration forces.
Solution Approach 2:
The connection between the inner liner and outer shell changes from static and rigid to dynamic and flexible. The rotation interface allows the inner liner to dynamically rotate relative to the outer shell in response to impact forces, providing active dampening of rotational acceleration while maintaining structural integrity through controlled motion.
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 system significantly reduces the risk of concussions by actively counteracting rotational forces, extending the time of impact and reducing the magnitude of G-forces during collisions, thereby minimizing head trauma.
Implementation Method 1
A helmet system utilizing magnetic fields to actively dampen rotational forces through magnetic repulsion, where an internal body with magnets oriented axially outwards interacts with an exterior shell
Implementation Method 2
sensors applied to players in practice and in games detect head acceleration forces
Data Source
AI summary
The present invention is a helmet system that reduces concussions by damping rotational force transmitted to a helmet user. The helmet has an exterior shell and an internal body that moves independently from the exterior shell. At least one magnetic source on the exterior shell's interior has a dipole directed axially at the internal body. At least one magnetic source on the internal body has a dipole aligned with the same axis, directed at the exterior shell. In a resting state magnetic sources generate a weak magnetic field. When an impact rotates the exterior shell, it moves off the initial alignment and closer to the internal body. The previously aligned magnetic sources torque. The magnetic source on the internal body torques in the opposite direction of the rotation, as do all initially aligned magnetic sources impacted. Angular momentum is displaced, diffused, offset, damping rotational force transmitted to a helmet user.