Vehicle Left-Behind Detection Using Thermal Triggering
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Solution Overview
Problem
Conventional in-vehicle person detection systems face challenges in accurately determining the presence of a living body before activating the imaging device, relying on mass sensors which have low detection accuracy and require multiple sensors across vehicle seats.
Innovation Solution
A left-behind detection device that utilizes temperature sensors to identify heat sources within specific temperature ranges, determining if a living body is present before activating the imaging device, thereby reducing unnecessary device activation and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mass sensors are used to detect living bodies before imaging device activation, then device activation can be controlled, but detection accuracy is insufficient and multiple sensors are required
Solution Approach 1:
The patent replaces mass sensors (mechanical detection system) with temperature sensors (thermal detection system). Temperature sensors detect heat sources emitted by living bodies, providing accurate detection without requiring multiple sensors across vehicle seats. This substitution resolves the contradiction by maintaining detection accuracy while reducing device complexity.
Solution Approach 2:
The patent changes the detection parameter from mass to temperature. By monitoring temperature changes and heat source detection instead of mass distribution, the system achieves accurate living body detection with fewer sensors. This parameter change resolves the contradiction between detection accuracy and device complexity.
2Reliability
If the imaging device is activated continuously to ensure detection, then detection reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements preliminary detection using temperature sensors to identify heat sources before activating the imaging device. This preliminary action ensures that the imaging device is only activated when a living body is detected, maintaining detection reliability while avoiding continuous operation and excessive power consumption.
Solution Approach 2:
The system uses periodic temperature monitoring followed by conditional imaging device activation. Instead of continuous imaging, the system periodically checks temperature and only activates the imaging device when heat sources are detected, reducing power consumption while maintaining reliable detection capability when needed.
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 accurate detection of living bodies within vehicles with reduced sensor installation needs and minimized power consumption by using heat source information to trigger imaging device activation only when a living body is likely present.
Implementation Method 1
a temperature sensor 200 and an imaging device 300 in addition to the left-behind detection device 1
Data Source
AI summary
A vehicle information acquiring unit for acquiring vehicle information; a heat source information acquiring unit for acquiring heat source information; a stop determining unit for determining whether or not a vehicle is stopped on the basis of the vehicle information; a heat source determining unit for determining whether or not a heat source satisfying a target condition is generated in the vehicle on the basis of the heat source information, when the stop determining unit determines that the vehicle is stopped; an activation control unit for activating an imaging device, when the heat source determining unit determines that a heat source satisfying the target condition is generated; an image acquiring unit acquiring a captured image of inside of the vehicle from the imaging device; and a notification control unit outputting notification information to the outside of the vehicle, when a living body is detected in the captured image.