School Bus Radar Layout for Detecting Children Left Behind
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Solution Overview
Problem
Existing safety systems for school vehicles fail to accurately detect children who have not disembarked or are approaching the vehicle, particularly when they do not carry RF emitting devices or are temporarily separated from them.
Innovation Solution
A safety system using radar sensors installed on side and upper walls of the vehicle to detect bio-signals of children inside, with an alarm indicator and power supply device to generate warnings when children are left behind.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RF emitting terminals are installed on children for safety monitoring, then the driver can recognize whether children board or disembark, but the system cannot detect children who do not carry the terminal or are temporarily separated from it
Solution Approach 1:
The patent replaces the RF terminal system with a radar-based detection system. The radar sensor module uses electromagnetic waves to directly detect children's bodies without requiring them to carry any terminal device. This substitution eliminates the dependency on RF terminals while maintaining detection capability, thereby improving reliability for children who may not carry terminals.
Solution Approach 2:
The patent introduces a radar sensor module as an intermediary detection device installed in the vehicle. This radar module acts as a mediator between the driver and the children, providing indirect detection of children's presence through bio-signal detection without requiring direct interaction with the children via RF terminals.
2Area of stationary object
If multiple radar sensor modules are installed to cover all seating positions, then detection coverage is improved, but the device complexity and cost increase
Solution Approach 1:
The patent divides the detection area into multiple sectors, each corresponding to a specific seating position. The radar sensor module is configured to detect bio-signals in different directional sectors, allowing comprehensive coverage of all seating positions while using a single modular detection system rather than multiple independent sensors.
Solution Approach 2:
The radar sensor module is designed with multi-functional capability to detect bio-signals across multiple sectors and seating positions simultaneously. A single module can monitor multiple areas by adjusting its detection sectors, eliminating the need for separate sensors for each seat and reducing overall system complexity.
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
Effectively detects and alerts drivers to children remaining in the vehicle, enhancing safety by ensuring all passengers have disembarked.
Implementation Method 1
a safety system inside a school vehicle using a radar sensor includes: a plurality of side radar sensor modules
Data Source
AI summary
A safety system inside a school vehicle using a radar sensor according to one aspect of the present invention comprises a plurality of side radar sensor modules installed on one side wall at a height corresponding to seat level for each row of seats with detection areas divided into sectors corresponding to seat positions to detect human bio-signals, upper radar sensor modules, an alarm indicator that receives bio-signal detection results from the radar sensor modules to determine alarm generation and outputs warning sounds through a speaker while flashing LEDs when an alarm is triggered, and a power supply device that switches between operating and sleep modes according to the vehicle's power status to supply power to the radar sensor modules and alarm indicator, thereby preventing accidents by detecting bio-signals of children remaining inside the school vehicle and generating alarms.