Vehicle Lever Position Detection with Dual Rotor Redundancy
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Solution Overview
Problem
Existing position detecting devices for vehicle operation levers require multiple detection means to ensure reliability, leading to increased size and cost due to the need for redundant components to detect abnormalities, but this redundancy is not always effective in identifying issues with both detection systems simultaneously.
Innovation Solution
A position detecting device that uses a driven member to rotate both first and second rotors in response to the operation lever's oscillation in either direction, allowing for the determination of rotor malfunctions and reducing the number of required detection units and rotors, thereby minimizing the device's size and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two first detection means and two second detection means are provided to detect abnormalities, then reliability is improved, but device size and price increase
Solution Approach 1:
The patent makes both the first and second rotors rotate in response to operation lever oscillation in either direction, enabling each rotor to serve dual purposes: detecting position changes and serving as a backup for abnormality detection. This multi-functionality allows reliable abnormality detection with fewer components.
Solution Approach 2:
The patent combines the functions of position detection and abnormality detection into a single rotor system. By having both rotors respond to oscillation in both directions, the system merges redundant detection capabilities into a unified structure, reducing the total number of detection units needed.
2Reliability
If two first detection means and two second detection means are provided to detect abnormalities, then reliability is improved, but device price increases
Solution Approach 1:
The patent makes both the first and second rotors rotate in response to operation lever oscillation in either direction, enabling each rotor to serve dual purposes: detecting position changes and serving as a backup for abnormality detection. This multi-functionality allows reliable abnormality detection with fewer components.
Solution Approach 2:
The patent combines the functions of position detection and abnormality detection into a single rotor system. By having both rotors respond to oscillation in both directions, the system merges redundant detection capabilities into a unified structure, reducing the total number of detection units needed.
3Device complexity
If only one detection means is used when the operation lever is operated, then device size is reduced, but abnormality detection capability is lost
Solution Approach 1:
The patent makes both the first and second rotors rotate in response to operation lever oscillation in either direction, enabling each rotor to serve dual purposes: detecting position changes and serving as a backup for abnormality detection. This multi-functionality allows reliable abnormality detection with fewer components.
Solution Approach 2:
The patent dynamically adapts the detection system by having both rotors respond to oscillation in both directions, allowing the system to maintain abnormality detection capability while using fewer components. The rotors dynamically serve multiple functions based on the oscillation direction.
Data Source
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AI summary
An operation body (1) is supported so as to be capable of oscillating in a Y1-Y2 direction that is a first direction and an X1-X2 direction that is a second direction. Even though the operation lever (1) oscillates in either direction of a first direction and a second direction, a first rotor (551) and a second rotor (552) are rotated so as to follow the oscillation of the operation lever (1) by a support member (51) and a driven member (53). When operating positions (1) to (5) are switched, both detection signals (S681, S682) of detection units (681, 682) are changed. When only one of the detection signals (S681, S682) is changed, a determination unit (71) can determine that the detection unit (681 or 682) corresponding to the unchanged detection signal is out of order