Convertible Top Position Detector Using Merged Hall Sensors
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Solution Overview
Problem
Existing convertible vehicle top systems lack an efficient and compact position detection mechanism capable of detecting multiple relative positions between the roof tip and the front cowl, requiring additional components and increased installation space.
Innovation Solution
A position detector using a single magnetic element interacting with at least two Hall-effect sensor elements, allowing for detection of different distances, reducing the number of parts and installation space required, and integrating the sensor unit with the top lock for actuation signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional position detection mechanisms are used to detect multiple relative positions between the roof tip and the front cowl, then detection capability is achieved, but the number of components increases and installation space is increased
Solution Approach 1:
The patent combines multiple Hall-effect sensor elements into a single integrated sensor unit that detects multiple positions using one magnetic element. This merging approach allows the system to detect ready-to-latch and closed positions simultaneously while reducing the total number of separate components compared to traditional multi-sensor systems
Solution Approach 2:
The sensor unit is designed with multi-functional capability to detect multiple relative positions (ready-to-latch position and closed position) between the roof tip and front cowl using a single integrated unit. This universal design eliminates the need for separate detection mechanisms for each position, thereby reducing component count while maintaining comprehensive position detection
2Measurement precision
If traditional position detection mechanisms are used to detect multiple relative positions, then detection capability is achieved, but installation space is increased
Solution Approach 1:
By merging multiple sensor elements into one integrated sensor unit and using a single magnetic element, the patent significantly reduces the space required for installation. The compact sensor unit can be mounted in limited spaces between the roof tip and front cowl, whereas traditional separate sensors would require more distributed installation space
Solution Approach 2:
The sensor unit employs a nested configuration where multiple Hall-effect sensor elements are integrated within a single housing or mounting structure. This nesting approach allows the detection components to be compactly arranged, minimizing the footprint and installation space required while maintaining the ability to detect multiple positions
3Measurement precision
If multiple separate sensors are used for position detection, then detection accuracy is maintained, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple sensor functions into a single manufactured unit, reducing the total component count that needs to be sourced, inventoried, and assembled. This consolidation lowers manufacturing costs through reduced part numbers, simplified supply chain management, and decreased assembly operations, while the integrated sensor unit maintains detection accuracy through coordinated Hall-effect sensor elements
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
Enables precise detection of ready-to-latch and closed positions, reducing the number of components and installation complexity while providing low-cost, compact position detection for secure roof operation.
Implementation Method 1
a sensor unit having at least two Hall-effect sensor elements, one of which switches at a first distance between the sensor unit and a magnetic element and the other one of which switches at a second distance between the sensor unit and the magnetic element
Data Source
AI summary
A convertible top, having a linkage for displacing the top, a roof tip fixed to a front vehicle cowl in a closed position, a top lock which displacable between a locked and released position and secures the roof tip to the front cowl when the top is in the closed position and has a locking support having a pivotable locking hook and a locking counterpart which can be engaged with the locking hook, and a position detector which detects a relative position between the roof tip and the front cowl. The position detector has a sensor unit having at least two Hall-effect sensor elements, one of which switches at a first distance between the sensor unit and a magnetic element and the other one of which switches at a second distance between the sensor unit and the magnetic element, the second distance being different from the first distance.