Touch Panel Speed Control for Driverless Automatic Vehicles
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Solution Overview
Problem
Automatic driving vehicles without a driver's seat, brake pedal, acceleration pedal, or steering wheel face challenges in allowing operators to issue multiple instructions for deceleration and acceleration control while in automatic driving mode, as existing systems only provide emergency stop buttons and lack the necessary control options.
Innovation Solution
An automatic driving control system that utilizes a touch panel to execute deceleration and acceleration controls through long and short presses on a single button, allowing operators to select from different control modes based on the duration of the operation, enabling more precise control over vehicle speed and mode transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If only emergency stop buttons are provided in automatic driving vehicles, then the system structure remains simple, but the operator cannot issue multiple instructions for deceleration and acceleration control
Solution Approach 1:
A single button on the touch panel serves multiple functions by responding to different operation durations. The same button can initiate first deceleration control when pressed for a longer duration (e.g., 1 second or more) and second deceleration control when pressed for a shorter duration (e.g., less than 1 second), eliminating the need for separate buttons for different control modes while providing versatile operator control options
Solution Approach 2:
The system distinguishes between different control modes by detecting the duration parameter of the button press operation. By monitoring how long the operator holds the button, the system determines whether to execute first deceleration control (long press) or second deceleration control (short press), thereby providing multiple control aspects without adding physical complexity to the interface
2Adaptability or versatility
If multiple buttons are provided for different deceleration controls, then the operator can issue multiple instructions, but the device complexity increases
Solution Approach 1:
The touch panel button is designed to perform multiple control functions based on the operation characteristics rather than requiring separate physical buttons. The single button can execute first deceleration control, second deceleration control, and potentially other control modes by detecting different press durations, thereby reducing the number of physical components while maintaining versatile control capabilities
Solution Approach 2:
The system adds a temporal dimension to the button operation by considering the duration of the press. This transforms a simple spatial button interface into a multi-dimensional control mechanism where the time aspect (how long the button is held) provides additional control nuance without requiring additional spatial elements or buttons
3Ease of operation
If deceleration control is executed immediately after operation completion, then the response is fast, but the operator cannot control the deceleration timing and speed profile
Solution Approach 1:
The system provides dynamic control over deceleration characteristics by offering multiple deceleration modes that can be selected through different button press durations. The first deceleration control and second deceleration control provide different deceleration profiles and timing characteristics, allowing the operator to adapt the control behavior to the specific traffic situation while maintaining responsive execution once the mode is selected
Data Source
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AI summary
A touch panel (28) of an automatic driving vehicle (10) includes a SLOW DOWN button (80). An operator is able to operate the SLOW DOWN button (80) while the vehicle is running in the automatic driving mode to apply different deceleration controls using a first operation, or a long press, and a second operation, or a short press. For example, when a long press is applied, the automatic driving vehicle (10) completes deceleration at time t4, or a time immediately after time t3 at which the long press operation is completed. In contrast, when a short press is applied, the automatic driving vehicle (10) completes deceleration after the elapse of a relatively long period after completion of the short press.