Vehicle Cargo Door Sensor Module with Dynamic Deployment
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Solution Overview
Problem
Vehicle cargo doors may automatically close and damage objects extending from the cargo area, as existing detection systems are inadequate for preventing such collisions.
Innovation Solution
A pressure-sensitive sensor module with a deployment mechanism is mounted along the cargo door, extending and retracting to detect objects in the seam between the door and the vehicle body, generating a signal to halt the door's closure when contact is made.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensor is continuously extended to detect objects during door closure, then detection reliability is improved, but the sensor is more exposed to damage from door contact
Solution Approach 1:
The sensor transitions from a static to a dynamic state by implementing extend and retract movements. The sensor is extended into the seam during door closure to detect objects, then retracted into the housing when not needed, reducing exposure to damage while maintaining detection capability when required.
Solution Approach 2:
The sensor is extended in advance before the door reaches the critical closing position, allowing detection of objects in the seam before the door makes contact. This preliminary extension enables the system to prepare for potential obstructions before they become a hazard.
2Object-affected harmful factors
If the sensor is retracted into the housing when not in use, then protection from damage is improved, but the sensor cannot detect objects in the seam
Solution Approach 1:
The sensor implements dynamic extend/retract operations based on operational requirements. During door closure, the sensor extends to detect objects; when the door is stationary or fully closed, the sensor retracts into the housing for protection. This dynamic behavior resolves the contradiction between protection and detection capability.
Solution Approach 2:
The sensor operates in periodic cycles of extension and retraction synchronized with door closure operations. The sensor extends during the critical closing phase when detection is needed, then retracts during non-critical phases, creating a periodic pattern that balances detection reliability with sensor protection.
3Adaptability or versatility
If the sensor module includes a deployment mechanism for extending and retracting the sensor, then device functionality is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical deployment mechanisms with alternative actuation methods. The sensor is extended and retracted using non-mechanical or simplified mechanical means such as magnetic actuators, shape memory alloys, or spring-loaded systems, reducing the complexity of the deployment mechanism while maintaining the extend/retract functionality.
Solution Approach 2:
The sensor is nested within the housing in a compact configuration. When retracted, the sensor fits within the housing cavity; when extended, it protrudes into the seam. This nesting arrangement allows the deployment mechanism to be integrated within the housing structure rather than requiring external components, reducing overall device complexity.
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
Prevents damage to objects and the door mechanism by ensuring the cargo door does not fully close when an obstruction is detected, enhancing safety and reducing potential damage.
Implementation Method 1
a pressure-sensitive sensor mounted in the housing so as to be extendible from the housing and retractable into the housing
Data Source
AI summary
A sensor module for a vehicle includes a housing structured to be mounted along a sidewall of a cargo door, and a pressure-sensitive sensor mounted in the housing so as to be extendible from the housing and retractable into the housing. A sensor deployment mechanism is operatively coupled to the sensor and is structured to be operable to extend the sensor from the housing and to retract the sensor into the housing.