School Bus LED Alert Assembly for Travel Status Signaling
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Solution Overview
Problem
Existing vehicle alert systems for school buses do not effectively provide visual information to pedestrians and other drivers about the bus's travel conditions, such as speed, slowing, or stopping, especially during passenger loading and unloading.
Innovation Solution
A visual alert assembly for school buses that uses LED lighting with a flexible strip configuration, incorporating WHITE, AMBER, and RED LEDs to indicate travel conditions, powered by a 12V DC source and equipped with X-Y-Z motion detection, including an ambient light sensor to adjust illumination intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional vehicle alert systems are used, then basic deceleration signaling is provided, but visual information about bus travel conditions during loading and unloading is insufficient
Solution Approach 1:
The alert system is segmented into multiple independent LED indicators positioned at different locations on the bus (front, rear, sides). Each indicator provides specific information about bus state (moving, stopping, loaded, unloaded), allowing pedestrians and drivers to understand bus travel conditions from multiple angles and distances, thereby reducing information loss without compromising reliability
Solution Approach 2:
Different regions of the bus are equipped with specialized lighting indicators tailored to local needs. For example, front and rear indicators show different states (front shows moving/stopping, rear shows loaded/unloaded), and side indicators provide additional visibility. This localized quality enhancement ensures comprehensive visual information delivery while maintaining system reliability
2Loss of information
If multiple LED indicators are added to show different bus states, then visual information completeness is improved, but device complexity increases
Solution Approach 1:
The lighting assembly uses a universal controller that manages multiple LED indicators (front, rear, side indicators) with a single control unit. The controller receives inputs from various sensors (motion detectors, load sensors) and automatically activates the appropriate LED pattern, enabling one component to perform multiple functions and reducing overall system complexity despite the increased number of indicators
Solution Approach 2:
Multiple functional components are merged into integrated assemblies. The controller combines motion detection, state monitoring, and LED control functions. The power supply unit consolidates electrical distribution to all LED indicators. This merging approach reduces the number of separate components and simplifies system architecture while maintaining comprehensive visual information display
3Loss of information
If LED indicators are positioned for maximum visibility to pedestrians and drivers, then information delivery is improved, but installation complexity and cost increase
Solution Approach 1:
The LED indicators are pre-assembled into modular units with integrated wiring and mounting hardware before delivery to the installation site. The controller is pre-programmed with the logic for different bus states. This preliminary preparation simplifies on-site installation, allowing workers to simply mount the pre-assembled units rather than performing complex wiring and configuration during installation
Solution Approach 2:
The system uses flexible wiring harnesses and adjustable mounting brackets that allow the LED indicators to be positioned optimally for visibility while accommodating variations in different bus models and installation environments. The modular design enables easy repositioning or replacement of individual components without affecting the entire system, thereby easing manufacturing and installation processes
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
Provides clear visual cues to drivers and pedestrians about the bus's movement, loading, and unloading status, enhancing safety by clearly signaling speed changes and stops.
Implementation Method 1
an LED array, with the housing including a recessed portion housing the LED array
Implementation Method 2
wherein a solar array is embodied to a top surface of the housing
Data Source
AI summary
A visual alert assembly for use with a school bus having a rear shell seating one or more PC boards integrating illuminating elements. A forward facing outer perimeter mounting surface of the shell includes an adhesive adapted to mount the assembly to a glass associated with any of a forward windshield or rear window of the vehicle so that the illuminating elements are visible through the glass. Each of external power and control inputs extending through the rear shell and communicates with the PC boards for operating the illuminating elements according to any of intensity, color or pattern in response to a change in a travel condition of the vehicle.