Power Seat Anti-Pinch Detection Using Position-Based Current Learning
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Solution Overview
Problem
Conventional power seats lack an effective anti-pinch function, leading to potential injuries or damage when a body part or article is pinched during seat movement, and existing systems fail to accurately detect such occurrences due to inconsistent current levels and environmental influences.
Innovation Solution
An apparatus and method using a hall sensor and controller to train and adjust current levels for each seat position, incorporating a learning algorithm to optimize anti-pinch detection by comparing measured current values with trained reference levels, and correcting for environmental factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a constant reference current value is used for anti-pinch detection, then the device complexity is reduced, but the measurement precision deteriorates leading to erroneous detection in different seat positions
Solution Approach 1:
The reference current level is changed from a constant value to a dynamic value that varies according to the seat position. The controller adjusts the reference current level based on feedback from the hall sensor that detects seat position, ensuring the reference current matches the actual current requirements at each position for accurate pinch detection
Solution Approach 2:
A feedback mechanism is implemented where the hall sensor continuously monitors the seat position and provides this information to the controller. The controller then uses this position information to dynamically adjust the reference current level, creating a closed-loop system that maintains detection accuracy across all seat positions
2Ease of operation
If the current level value is fixed, then the ease of operation is improved, but the reliability deteriorates due to inability to adapt to environmental changes and different seat positions
Solution Approach 1:
The system performs self-adjustment by automatically modifying the reference current level based on the seat position detected by the hall sensor. This eliminates the need for manual calibration or configuration, as the system adapts itself to different operating conditions without user intervention
Solution Approach 2:
The reference current level parameter is changed dynamically based on the seat position. Instead of using a fixed parameter value, the system adjusts this parameter in real-time according to the physical state of the seat, ensuring reliable detection across varying conditions
3Manufacturing precision
If a simple constant current reference is used, then the manufacturing precision requirements are reduced, but the measurement precision deteriorates causing erroneous reverse operation
Solution Approach 1:
The current reference transitions from a static manufactured value to a dynamic value that is continuously adjusted based on seat position. This dynamic approach eliminates the need for precise manufacturing calibration at different positions, as the system adapts the reference current in real-time
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
Enhances the anti-pinch function by accurately detecting and preventing pinching events through adaptive current level adjustments, ensuring reliable operation and safety by minimizing erroneous movements.
Implementation Method 1
a hall sensor to sense a position to which the power seat moves
Data Source
AI summary
An apparatus for controlling anti-pinch of a power seat in a vehicle, and a method for the same, include a hall sensor to sense a position to which the power seat moves, a driving motor to drive movement of the power seat, a current sensor to measure a level of a current output from the driving motor, and a controller. The controller is configured to train a reference current level for determining the anti-pinch with respect to each position of the power seat by using the hall sensor and the current sensor, to compare a current value, which is measured with respect to each position of the power seat through the current sensor, with the trained reference current level for determining the anti-pinch, and to determine the anti-pinch.