Steering Wheel Touchpad Coordinate Correction
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Solution Overview
Problem
Conventional vehicle operation devices often result in unintended operation direction corrections and restricted finger movement when using touch pads or switches on a steering wheel, leading to potential misoperations due to the rotation of the steering wheel.
Innovation Solution
A vehicle operation device with a grip part, operation unit, operation detection device, display unit, steering angle detection device, travel state detection device, correction device, and correction prohibition device that adjusts and locks the coordinate system based on steering angle, travel state, and operator input to prevent unintended corrections, ensuring accurate finger movement and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the coordinate system is corrected according to steering angle, then the operation direction accuracy is improved, but unintended corrections occur during specific operations causing misoperations
Solution Approach 1:
The correction prohibition device applies preliminary anti-action by detecting when steering occurs during touch operations and preemptively prohibiting coordinate system correction. This prevents the harmful effect of unintended corrections that would otherwise occur during specific operation situations, thereby maintaining operation reliability while preserving the benefits of coordinate correction during normal steering.
2Ease of operation
If the operation panel is provided on the steering wheel, then the ease of operation is improved, but the finger movement distance and angle are restricted
Solution Approach 1:
The system dynamically changes the coordinate system parameters based on steering angle detection. When steering occurs during touch operations, the coordinate system correction is prohibited, effectively changing the operational parameters to accommodate the restricted finger movement conditions. This allows the operation panel to remain on the steering wheel for ease of operation while adapting to the physical constraints of finger movement.
3Measurement precision
If the coordinate system is corrected based on steering angle, then the operation direction matches the intended direction, but the device complexity increases due to multiple detection and control components
Solution Approach 1:
The control device performs multiple functions: it detects touch operations, detects steering angle, determines whether to prohibit correction based on the combination of these inputs, and executes the appropriate coordinate system adjustment or prohibition. By making the control device universal and multi-functional, the patent reduces overall system complexity while maintaining the ability to provide accurate coordinate correction when appropriate.
Data Source
AI summary
An operation unit provided on a grip part of a steering wheel, and having an operation panel in which contact operations are possible by the fingers of an operator; an operation detection unit that detects contact operations with respect to the operation panel with a predetermined coordinate system as a reference; a display control unit that controls the display of a display device according to the contact operations detected by the operation detection unit; a correction unit that corrects a coordinate system according to a steering angle detected by a steering angle detection device; and a correction prohibition device that, based on at least one from among contact operations detected by the operation detection device, a steering angle detected by a steering angle sensor, and a speed detected by a speed sensor, prohibits correction of the coordinate system by the correction unit.