Vehicle Door Pressure Sensor Layout for Water-Shielded Collision Detection
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Solution Overview
Problem
Current vehicle door structures face issues with water ingress into pressure sensors, affecting their detection performance and safety during collisions, as the sensors are often exposed to water dripping from the glass door opening.
Innovation Solution
The pressure sensor is positioned at the periphery of the vehicle inner door panel, either overlapping the glass door opening or on the side surface closer to the inner side of the vehicle width direction, ensuring it remains protected from water and can effectively detect pressure changes between the inner and outer door panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pressure sensor is disposed on the outer surface of the vehicle inner door panel to detect collision, then the detection performance is improved, but water from the glass door opening can directly drip into the pressure sensor, affecting its detection performance and reliability
Solution Approach 1:
The pressure sensor is positioned at a location that overlaps with the glass door opening when viewed from the vehicle width direction, and at least part of the sensor is disposed closer to the inner side than the inner door panel. This spatial repositioning in multiple dimensions allows the sensor to remain aligned with the opening for collision detection while being protected from water ingress.
Solution Approach 2:
The inner door panel itself serves as an intermediary protective barrier between the pressure sensor and water from the glass door opening. By positioning the sensor behind the inner door panel at the overlapping position, the panel structure naturally shields the sensor from water while allowing collision pressure to be transmitted through the panel to the sensor.
2Object-affected harmful factors
If the pressure sensor is displaced in the front-rear direction from the glass door opening to avoid water, then water ingress is prevented, but the mounting position is restricted and detection accuracy may be compromised
Solution Approach 1:
Instead of displacing the sensor only in the front-rear direction, the invention utilizes the vehicle width direction positioning by placing the sensor at a location that overlaps with the opening when viewed from the width direction. This multi-dimensional positioning strategy provides flexibility in mounting while maintaining both water protection and detection accuracy.
Solution Approach 2:
The pressure sensor is positioned at a specific local region where it overlaps with the glass door opening in the width direction view. This localized positioning allows the sensor to benefit from both the opening alignment for collision detection and the inner door panel protection from water, creating an optimal local mounting zone.
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
This configuration enhances the waterproof effect and detection performance of the pressure sensor, thereby improving the safety performance in collision scenarios by preventing water ingress and maintaining accurate detection.
Implementation Method 1
the pressure sensor is able to detect whether a collision has occurred to the side surface of the vehicle through detection of change of air pressure in the space between the vehicle inner door panel and the vehicle outer door panel
Data Source
AI summary
Disclosed is a vehicle door structure capable of improving the waterproof effect and detection performance of the pressure sensor, thereby improving the safety performance in collision. The vehicle door structure includes: a vehicle inner door panel provided with an opening; a vehicle outer door panel disposed on the outer side of the vehicle inner door panel in the vehicle width direction; and a pressure sensor arranged on the periphery of the vehicle inner door panel, and disposed at a position adjacent to the opening. The pressure sensor is arranged at a position overlapping the opening viewed from the vehicle width direction, and at least a part of the pressure sensor is disposed at a position closer to the inner side of the vehicle width direction than the vehicle inner door panel.