Vehicle HMI Input Device Selection for Accurate GUI Control
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Solution Overview
Problem
In vehicle human machine interface (HMI) systems, users often inadvertently operate graphical user interfaces (GUIs) using the wrong input device, leading to unintentional control of vehicular systems, as the touchpad and knob can be misused simultaneously, causing confusion and potential errors.
Innovation Solution
The HMI system includes a device selection module that designates either the knob or touchpad as the active input device based on user intent, using sensors and a device selection switch to prevent unintentional operation by locking the inactive device and prioritizing the intended input method.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If both touchpad and knob are made operable simultaneously, then user has more input options and versatility, but user may inadvertently operate the wrong device causing confusion and errors
Solution Approach 1:
The system dynamically changes the operational state of input devices based on detected user intent. The controller monitors sensor data to determine which device the user intends to use, then dynamically activates only that device while deactivating the other. This dynamic adjustment resolves the contradiction by providing versatility when needed while ensuring reliability through selective activation.
Solution Approach 2:
The system uses sensor feedback to detect user intent and adjusts device activation accordingly. Sensors monitor user interactions and provide feedback to the controller, which then determines the appropriate active device. This feedback loop ensures that only the intended device responds to inputs, preventing accidental operations while maintaining multiple input options.
2Reliability
If device selection module designates one device as active and locks the other, then accidental operation is prevented, but user interaction flexibility is reduced
Solution Approach 1:
The system dynamically adjusts device activation based on real-time detection of user intent. Rather than permanently locking devices, the active device designation changes dynamically as user intent changes. This resolves the contradiction by maintaining reliability through selective activation while preserving flexibility through dynamic reconfiguration.
Solution Approach 2:
The system automatically determines user intent through sensor detection and self-adjusts device activation without requiring explicit user selection. The controller monitors interactions and autonomously decides which device should be active, eliminating the need for manual device selection while maintaining both reliability and flexibility.
3Reliability
If sensors and device selection switch are added to detect user intent, then accidental operation is prevented, but device complexity increases
Solution Approach 1:
The system uses existing sensors and a simple device selection switch to automatically detect user intent and determine the active device. Rather than adding complex control mechanisms, the system leverages simple components that users already interact with, allowing the system to self-determine the appropriate active device based on natural user behavior.
Solution Approach 2:
The system replaces complex mechanical device selection mechanisms with sensor-based detection and electronic control. Instead of requiring physical switches or buttons to select input devices, the system uses sensors to detect user intent and electronically activates the appropriate device, reducing mechanical complexity while improving reliability.
Data Source
AI summary
A human machine interface (HMI) system controls operation of a graphical user interface (GUI) being displayed on a display located in a vehicle. The HMI system includes an interface device, an interface operation module, and a device selection module. The interface device is operable to control the GUI and includes a knob member and a touchpad. The interface operation module receives input data from the interface device in response to an operation of the interface device. The device selection module designates at least one of the knob member or the touchpad as an active device based on a device selection criteria. The interface operation module transmits data from an active device to a display module controlling the GUI and disregards data from an inactive device.