Autonomous Wheelchair Securement Device with Adaptive Axle Latch
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wheelchair securement systems in autonomous vehicles are either limited to specific wheelchair models or require manual adjustment, which is impractical for the diverse range of wheelchairs and lacks automation in the absence of a human operator.
Innovation Solution
An autonomous universal wheelchair securement device with actuators that automatically adjust to secure any wheelchair model, comprising a latch system to grasp the axle, a mechanism for secure coupling with an adapter, and a controller to select from multiple securement modes, ensuring safe transit and compatibility with various wheelchairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed configuration securement device is used for a particular wheelchair make and model, then the securement reliability is improved, but the adaptability to different wheelchair types deteriorates
Solution Approach 1:
The securement device incorporates adjustable components that can dynamically change their position and configuration to match different wheelchair dimensions and characteristics. The latch mechanism can be repositioned along the arm to accommodate various axle positions, transforming a static device into a dynamic one that adapts to different wheelchair types while maintaining securement reliability.
Solution Approach 2:
The device allows modification of key parameters such as latch position, arm length, and securement force to match different wheelchair specifications. By changing these parameters based on the specific wheelchair being secured, the device maintains reliable securement across diverse wheelchair models without requiring multiple specialized devices.
2Adaptability or versatility
If a manual adjustment mechanism is provided to accommodate various wheelchair models, then the adaptability is improved, but the ease of operation deteriorates due to requiring manual intervention
Solution Approach 1:
The securement device is designed to automatically detect wheelchair characteristics and adjust its configuration without human intervention. The system self-calibrates by sensing the wheelchair's axle position and dimensions, then automatically repositions the latch and adjusts securement parameters, eliminating the need for manual adjustment while maintaining compatibility with various wheelchair models.
Solution Approach 2:
The device incorporates sensors that detect wheelchair characteristics and provide feedback to the control system. This feedback loop enables the system to automatically adjust the latch position and securement force based on real-time detection of wheelchair parameters, achieving both adaptability and ease of operation through automated closed-loop control.
3Adaptability or versatility
If a universal securement device is designed to accommodate all wheelchair types, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The securement device is designed as a multi-functional system that can secure various wheelchair types using a single unified mechanism. Rather than creating multiple specialized devices, the universal design incorporates adjustable components and automated detection that enable one device to perform the securement function across diverse wheelchair models, managing complexity through functional integration.
Solution Approach 2:
The device is divided into modular segments including an adjustable arm, repositionable latch, and independent sensing components. This segmentation allows each module to be independently adjusted or replaced, reducing overall system complexity while maintaining universal compatibility. The modular architecture enables flexible configuration for different wheelchair types without redesigning the entire system.
4Extent of automation
If automated actuators are added to enable automatic securement adjustment, then the extent of automation is improved, but the device complexity and cost increase
Solution Approach 1:
The device replaces manual mechanical adjustment with automated actuators controlled by electronic sensors and a control system. Instead of requiring manual operation of mechanical components, the system uses electric motors or linear actuators to automatically position the latch and adjust securement parameters, achieving high automation while managing complexity through electronic control rather than complex mechanical linkages.
Data Source
AI summary
A wheelchair securement system for a vehicle is provided, comprising a latch configured to grasp an axle of a wheelchair, actuators operatively coupled to the latch; and a controller configured to generate control signals that control movement of the actuators to place the latch in an operative position before the wheelchair enters the vehicle, the operative position comprising a location where the axle of the wheelchair can be grasped securely. Further, A method for securing a wheelchair in a vehicle is provided, the method comprising receiving wheelchair settings of a wheelchair to be secured in a vehicle, generating control signals according to the wheelchair settings, and communicating the control signals to an actuator of a wheelchair restraint, wherein the actuator moves the wheelchair restraint to secure the wheelchair according to the control signals.