Non-Contact 3D Scanning for Vehicle Door Position Control
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Solution Overview
Problem
Existing door system drive technologies face challenges in reliably determining the position and movement of door components not firmly connected to the drive, leading to inaccurate control and requiring complex, costly sensor systems with high maintenance needs.
Innovation Solution
A drive system utilizing a non-contact three-dimensional scanning sensor unit to determine the location and position of door components, eliminating the need for additional sensors and enabling precise control through real-time data, with an evaluation unit regulating the drive based on this data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If position sensors are used to determine the position and movement of door components, then measurement precision is improved, but device complexity and maintenance costs increase
Solution Approach 1:
The patent replaces mechanical position sensors (encoders, potentiometers) with an optical scanning system that uses a sensor unit to scan door components and determine their positions through image processing and coordinate transformation, thereby eliminating the need for complex mechanical sensing devices while maintaining measurement precision
Solution Approach 2:
The patent creates a digital copy of the door component's position and shape through scanning and coordinate transformation, allowing the control system to work with this digital representation rather than requiring direct physical sensors on the moving components
2Power
If torque is exceeded and toothed belts slip or jump, then drive power transmission is compromised, but position determination reliability deteriorates
Solution Approach 1:
The patent implements direct optical feedback by continuously scanning the actual position of door components and comparing it with the commanded position, allowing the control system to detect and correct transmission errors from toothed belt slippage or jumping in real-time, thereby maintaining position determination reliability even when power transmission is compromised
3Device complexity
If sensorless drive systems are used to reduce components, then device complexity is reduced, but position determination reliability deteriorates
Solution Approach 1:
The patent replaces sensorless estimation methods with direct optical scanning that physically measures the position of door components, providing reliable position determination without requiring complex sensor systems or position calculation algorithms
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 solution provides reliable and precise control of door components, reduces component complexity and maintenance costs, and allows for the inclusion of components not directly connected to the drive, enhancing operational safety and efficiency.
Implementation Method 1
a sensor unit which scans the door component three-dimensionally without contact and determines location data regarding its movement and respective position
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a drive system (20) for a door component of a door system (20) of a vehicle (42) for public transport. This system comprises: - a drive for the door component, - a sensor unit (26) that scans the door component three-dimensionally without contact and determines location data regarding its movement and respective position, and - an evaluation unit that determines the respective position of the door component from the location data obtained by the sensor unit (26) and, based on this, controls the drive of the door component.