Rearview Mirror Feedback Segmentation for Precise Joint Adjustment
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Solution Overview
Problem
Conventional rearview mirrors in vehicles lack precise and cost-effective adjustment mechanisms, leading to increased complexity and cost due to shared motors for mirror surface and support adjustments, and inadequate precision differentiation.
Innovation Solution
An adjustment apparatus for rearview mirrors that includes a position feedback module to distinguish between mirror surface and support adjustments, using sliding rheostats or gears with varying resistance/density to provide differential precision, allowing high-precision adjustment without increasing controller recognition precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shared motor is used for both mirror surface and support adjustments, then device complexity is reduced, but adjustment precision deteriorates
Solution Approach 1:
The feedback range of the position feedback module is divided into a first feedback range corresponding to mirror surface adjustment and a second feedback range corresponding to support adjustment. This segmentation allows different precision levels for different adjustment functions while using a single motor, resolving the contradiction between structural simplicity and adjustment precision.
Solution Approach 2:
Different feedback precision is applied to different adjustment functions: high precision for mirror surface adjustment (first feedback range) and lower precision for support adjustment (second feedback range). This local differentiation of quality enables precise mirror adjustment without requiring the entire system to have high precision, maintaining structural simplicity.
2Measurement precision
If high-precision adjustment is implemented for mirror surface, then adjustment precision is improved, but device complexity increases
Solution Approach 1:
The position feedback module implements local quality by providing high-resolution feedback only within the first feedback range for mirror surface adjustment, while using lower-resolution feedback for the second feedback range for support adjustment. This allows high precision where needed without requiring the entire controller to have high precision capabilities.
Solution Approach 2:
The feedback range is segmented into two distinct ranges with different precision requirements. The controller processes these segmented feedback ranges differently, applying high-precision processing only to the mirror surface adjustment portion while using simpler processing for support adjustment, thereby reducing overall controller complexity requirements.
3Measurement precision
If different precision levels are applied to mirror surface and support adjustments, then adjustment precision is improved, but manufacturing complexity increases
Solution Approach 1:
The position feedback module serves multiple functions: it provides both high-precision feedback for mirror surface adjustment and lower-precision feedback for support adjustment within a single device. This multi-functionality eliminates the need for separate feedback mechanisms for each adjustment type, reducing manufacturing complexity and cost while achieving differential precision.
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 adjustment of rearview mirrors with reduced costs by allocating appropriate precision to mirror surface and support adjustments, enhancing driving safety and reducing overall vehicle costs.
Implementation Method 1
The position feedback module includes a sliding rheostat, and the sliding rheostat includes a resistance adjustment region and a sliding block. The resistance adjustment region includes a first region and a second region that are adjacent to each other. The first region has a higher resistance density than the second region.
Data Source
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AI summary
An adjustment apparatus (2) for a rearview mirror (3) includes a mirror surface, a support, an input receiving module (21), a motor (22), a control module (23), and a position feedback module (24). The input receiving module (21) receives at least one of a first input (211) indicating adjustment of the mirror surface and a second input (212) indicating adjustment of the support. The motor (22) drives the mirror surface and the support to jointly rotate. The control module (23) is coupled to the input receiving module (21) and the motor (22), and drives, in response to the at least one input, the motor (22) to rotate. The position feedback module (24) is coupled to the motor (22), outputs first data to the control module (23) in response to the motor (22) rotating a predetermined angle based on the first input (211), and outputs second data different from the first data in response to the motor (22) rotating the predetermined angle based on the second input (212). The adjustment apparatus applies different adjustment precision to the adjustment of the mirror surface and the support, to implement high-precision adjustment of the mirror surface without changing recognition precision of a controller. A rearview mirror assembly, a transportation means, and an adjustment method for a rearview mirror are further included.