Vehicle Door Anti-Pinch Sensor Integration
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Solution Overview
Problem
Existing vehicle door systems face challenges in providing reliable anti-pinch protection, as indirect methods often result in delayed recognition of pinching cases due to the elasticity of the adjustment mechanism and the difficulty in monitoring large surfaces, leading to potential damage from excessive forces.
Innovation Solution
Incorporating a sensor device such as an acceleration sensor, gyrosensor, or force sensor on the vehicle door to directly measure movement changes and infer the presence of objects, combined with evaluating motor parameters for a more reliable anti-pinch protection system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If indirect anti-pinch protection methods are used (monitoring motor parameters), then the system complexity is reduced, but the recognition of pinching cases is delayed due to elasticity in the adjustment mechanism
Solution Approach 1:
A sensor device is introduced as an intermediary element between the vehicle door and the control device. This sensor directly measures movement changes or forces on the vehicle door and transmits this information to the control device, enabling immediate detection of pinching cases without the time delay inherent in indirect motor parameter monitoring methods
Solution Approach 2:
The patent replaces indirect mechanical monitoring (through the elastic transmission mechanism and motor parameters) with direct sensing using acceleration sensors, gyrosensors, or force sensors. This substitution eliminates the time delay caused by mechanical elasticity in the transmission element and provides immediate detection of abnormal forces or movement changes
2Loss of time
If sensor devices are added for direct measurement, then the recognition speed of pinching cases is improved, but the device complexity increases
Solution Approach 1:
The sensor device is designed to serve multiple functions: it not only detects pinching cases but also can measure the vehicle door's movement characteristics, acceleration, and angular velocity. This multi-functionality justifies the added complexity by providing comprehensive monitoring capabilities beyond just anti-pinch protection
Solution Approach 2:
The sensor acts as an intermediary that directly interfaces with the vehicle door's mechanical system, converting physical quantities (acceleration, angular velocity, force) into electrical signals for the control device. This direct measurement approach, while adding complexity, eliminates the time delay of indirect monitoring methods
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 solution enables early and reliable detection of pinching cases, allowing for timely counter-measures to prevent damage, by directly measuring movement changes and forces with minimal time delay, enhancing safety and reducing the risk of injury or system damage.
Implementation Method 1
an acceleration sensor arranged on the vehicle door for measuring the acceleration of the vehicle door
Implementation Method 2
a gyrosensor arranged on the vehicle door for measuring the angular velocity of the vehicle door
Implementation Method 3
a force sensor arranged in the flux of force between the vehicle door and the vehicle body
Data Source
AI summary
A vehicle door assembly may include a vehicle door pivotally arranged on a vehicle body, a drive motor for electromotively adjusting the vehicle door, a transmission element for producing a flux of force between the vehicle door and the vehicle body to adjust the vehicle door relative to the vehicle body, and a control device for controlling the drive motor. The control device may be configured to provide an anti-pinch protection. An acceleration sensor may be arranged on the vehicle door for measuring the acceleration of the vehicle door.