Rear Door Proximity Warning for Incomplete Liftgate Opening
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Solution Overview
Problem
Individuals frequently bump their heads on rear vehicle doors that fail to fully open or provide insufficient clearance, especially for taller individuals, due to inadequate door opening assist systems.
Innovation Solution
A vehicle warning system comprising sensors and a processor that detect objects within a defined zone near the rear door, activating an alert system when an individual is at risk of contacting the door, even if it is not fully open, using ultrasonic or capacitive sensing technology to track object movement and define a protection zone based on speed and direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If door opening assist devices are used to provide ease in opening the rear door, then the ease of operation is improved, but the reliability of full door opening is worsened due to potential malfunction
Solution Approach 1:
The sensor system performs preliminary detection of objects in the door path before the door completes its opening motion. The processor monitors the detection zone continuously and activates warnings in advance, allowing individuals to react before contact occurs, thus compensating for potential assist device failure
Solution Approach 2:
The system implements continuous feedback through sensor monitoring of the detection zone and provides real-time feedback to individuals via audible and visual alerts. This feedback loop compensates for the lack of reliable door opening by warning users when conditions are unsafe, effectively overriding the potential malfunction of assist devices
2Manufacturing precision
If the rear door is designed to open to a fixed position, then the manufacturing precision is improved, but the adaptability to different individual heights is worsened
Solution Approach 1:
The system dynamically adjusts the protection zone parameters based on real-time sensor detection. The processor modifies the detection zone size, alert timing, and warning activation thresholds according to the detected object's position, speed, and trajectory, enabling the fixed door design to adapt to various individual heights and movement patterns
Solution Approach 2:
The system changes operational parameters including detection zone dimensions, alert activation thresholds, and warning timing based on detected conditions. The processor adjusts these parameters dynamically to accommodate different individual characteristics, effectively making the fixed door position adaptable to varying height requirements
3Object-affected harmful factors
If sensor components are added to detect objects and provide warnings, then the safety is improved, but the device complexity is worsened
Solution Approach 1:
The sensor system serves multiple functions: detecting objects in the detection zone, determining object characteristics (size, speed, direction), defining dynamic protection zones, and triggering appropriate warnings. This multi-functionality consolidates what could be multiple separate systems into a single integrated solution, reducing overall complexity while maintaining comprehensive safety
Solution Approach 2:
The processor automatically performs object detection analysis, protection zone definition, and warning activation decisions without requiring external intervention. The system self-regulates by continuously monitoring sensor inputs and autonomously adjusting protection parameters and alert timing, minimizing the need for complex external control mechanisms
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 effectively warns individuals of potential head contact with the rear door, reducing the risk of injury by alerting them through audible and visual signals when the door is not fully open or provides insufficient clearance.
Implementation Method 1
the at least one sensor component includes an ultrasonic sensor
Implementation Method 2
the at least one sensor component includes a capacitive sensing chip configured to generate a signal that is transmitted from a first component in the rear door, and a plurality of receivers arranged in a plurality of predefined positions in the rear door that are separate from the first component and configured to detect the transmitted signal
Data Source
AI summary
A vehicle includes a rear door, at least one sensor component proximate to the rear door, an alert system, a memory in which program instructions are stored, and a processor operably connected to the alert system, the at least one sensor component, and the memory. The processor executes the program instructions to detect an object within a detection zone of the at least one sensor component relative to the rear door. The processor further activates the alert system in response to the object being within a predefined protection zone of the detection zone when the rear door is not moving.