Vehicle Panel Piezoelectric Voice Interface for External Interaction
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Solution Overview
Problem
Current vehicle systems lack the capability for effective human-machine interaction between people outside and inside a vehicle, particularly in scenarios requiring voice communication or alerts, due to the absence of software and hardware designed for such interactions.
Innovation Solution
A vehicle-mounted human-machine interaction system is developed, featuring a piezoelectric sound-generating circuit, a wake-up subsystem, and an on-board controller that enables voice interaction by vibrating vehicle panels to emit sound externally and processes voice inputs from outside the vehicle, using sensors and cameras for wake-up triggers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional vehicle systems are used, then the vehicle structure remains simple and cost-effective, but the capability for human-machine interaction with people outside the vehicle is insufficient
Solution Approach 1:
The patent combines multiple functions into the body panel by integrating the piezoelectric sound-generating circuit directly into the panel structure. The body panel serves both as the vehicle's exterior surface and as the sound-generating element, eliminating the need for separate speaker units and reducing overall system complexity while enabling external voice communication capability
Solution Approach 2:
The body panel is designed to perform multiple functions: it serves as the structural exterior panel, the sound-generating element through integrated piezoelectric circuits, and the interaction interface for external communication. This multi-functionality approach enables human-machine interaction without adding dedicated separate components
2Adaptability or versatility
If piezoelectric sound-generating circuits are integrated into body panels, then voice emission capability is achieved, but manufacturing complexity increases
Solution Approach 1:
The piezoelectric sound-generating circuits are pre-integrated into the body panel during the panel manufacturing process rather than being added as separate components afterward. This preliminary integration approach allows the circuits to be embedded within the panel structure, facilitating easier assembly and reducing the need for additional installation steps
Solution Approach 2:
The patent utilizes the piezoelectric effect, which converts electrical signals directly into mechanical vibrations of the panel. By changing the electrical parameters (applying voltage to the piezoelectric circuit), the panel itself vibrates to produce sound, eliminating the need for traditional speaker mechanisms and simplifying the overall manufacturing process
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
Enables two-way voice communication and control operations between vehicle occupants and external individuals, enhancing safety and user experience by allowing vehicles to alert pedestrians and respond to external inputs, such as voice commands or gestures.
Implementation Method 1
a piezoelectric ceramic speaker configured to, driven by the excitation voltage generated by the driver circuit, drive the body panel or the interior panel attached thereto to vibrate, thereby emitting the voice
Implementation Method 2
a vibration pad located between the vibration plate and the body panel or between the vibration plate and the interior panel and configured to adjust a frequency response of vibration generated by the vibration plate
Data Source
AI summary
A vehicle-mounted human-machine interaction system includes: a piezoelectric sound-generating circuit disposed in a cavity between a body panel as an outer surface of a vehicle and an interior panel as an inner surface of the vehicle and attached to either the body panel or the interior panel; a wake-up subsystem configured to wake up an on-board controller to turn on a human-machine interaction function based on at least one of voices, movements, or images of objects outside the vehicle; and the on-board controller configured to output an audio signal to the piezoelectric sound-generating circuit after being woken by the wake-up subsystem to turn on the human-machine interaction function such that as being excited by the audio signal, the piezoelectric sound-generating circuit vibrates the body panel or the interior panel to emit a voice to an exterior of the vehicle.