Roller Speed Input Control for Faster Vehicle Speed Setting
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Solution Overview
Problem
Existing vehicle speed setting methods, particularly in autonomous driving, lack operability and convenience, especially for wheel-type input devices, making it difficult to smoothly set vehicle speeds.
Innovation Solution
A vehicle control device with a roller-type operation switch that allows drivers to adjust vehicle speed through rotation, incorporating a control system that sets speeds based on prescribed times, speeds, or amounts, and utilizes sensors to determine speed limits, preceding vehicle speeds, and road conditions to facilitate easy setting of optimal vehicle speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a wheel-type input device is used for vehicle speed setting, then the device complexity is reduced, but the ease of operation deteriorates because long pressing is not effective for wheel type
Solution Approach 1:
The control part dynamically changes the vehicle speed setting behavior based on the rotation speed of the wheel-type input device. When rotation speed exceeds a threshold, the system switches to direct speed setting mode; otherwise, it uses incremental adjustment mode. This dynamic response makes the wheel-type device operable for both quick and precise speed adjustments.
Solution Approach 2:
The system changes the parameter of rotation speed threshold to determine the operating mode. By monitoring whether the rotation speed exceeds a predetermined threshold, the control part switches between different speed setting behaviors, making the wheel-type input device functional for various speed adjustment needs.
2Measurement precision
If incremental speed adjustment is used, then precision is improved, but the time required to reach desired speed increases
Solution Approach 1:
The control part dynamically adjusts the speed setting strategy based on rotation speed. For slow rotations below the threshold, it uses incremental adjustment for precision; for fast rotations exceeding the threshold, it uses direct speed setting for speed. This dynamic adaptation resolves the time-precision tradeoff.
Solution Approach 2:
When rotation speed exceeds the threshold, the system applies excessive action by directly setting the speed based on rotation amount rather than incremental adjustment, allowing rapid speed changes when precision is less critical than speed of operation.
Data Source
AI summary
The disclosure provides a vehicle control device, including: an input part, configured to change a setting of a speed of a vehicle through a rotation operation of a driver; and a control part, configured to change the speed of the vehicle based on an input result of the input part. When the input result of the input part is greater than or equal to a prescribed time, or greater than or equal to a prescribed speed, or greater than or equal to a prescribed amount, the control part changes a vehicle speed to a second speed set to a vehicle speed greater than or equal to a first speed.