Laser Child Seat Occupancy Detection Without Complex Sensors

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Solution Overview

Problem

Existing child car seat safety systems are often complex, expensive, and difficult to install, and they may not accurately determine the presence or absence of a child in the car seat, which can lead to children being left unattended and at risk of heat-related injuries.

Innovation Solution

A device affixed to a car seat that uses a laser component to determine the occupancy of the car seat by transmitting alerts via a computing device's graphical user interface when the laser beam is uninterrupted or interrupted, indicating the car seat's occupancy status.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If weight sensors are used to detect child presence in car seats, then detection accuracy is improved, but device complexity and installation difficulty increase

Engineering Contradiction:

Improvechild presence detection accuracyVSAvoidsystem component quantity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces mechanical weight sensors with an optical detection system using a laser beam and photodetector. The laser beam passes through the car seat, and when a child occupies the seat, the beam is blocked, triggering an alarm. This substitution eliminates the need for complex mechanical sensing components while maintaining detection accuracy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent extracts the detection function from complex integrated sensor systems and implements it using a simple, standalone optical device that can be independently installed on any car seat. This extraction allows the system to be added without modifying the car seat structure or requiring specialized components.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If specialized car seats with integrated sensors are used, then detection reliability is improved, but ease of operation and universal applicability deteriorate

Engineering Contradiction:

Improvechild presence detection reliabilityVSAvoidinstallation ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent designs a universal detection device that can be installed on any car seat regardless of manufacturer or model. The device uses external mounting brackets and a laser beam that passes through the car seat structure, making it compatible with various seat designs without requiring integration into specific seat models.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent introduces an intermediary optical detection device that mediates between the car seat and the detection system. The device mounts externally to the car seat and uses a laser beam as an intermediary to detect occupancy, avoiding the need for direct integration with the car seat's internal structure or specialized components.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Measurement precision

If multiple sensors and electronic components are integrated into the car seat, then detection accuracy is improved, but ease of manufacture and cost increase

Engineering Contradiction:

Improveoccupancy detection accuracyVSAvoiddevice manufacturing simplicity

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent replaces complex electronic sensor systems with a simple optical detection mechanism using a laser diode and photodetector. This substitution dramatically simplifies the manufacturing process, as these optical components are inexpensive, readily available, and require minimal assembly compared to integrated weight sensor systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent employs inexpensive optical components (laser diode, photodetector, and basic electronics) that can be manufactured at low cost and replaced if needed. These components are much cheaper than specialized weight sensors, making the overall device economically viable and easy to manufacture.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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

The device provides a simple, easy-to-use solution that can be affixed to any car seat, accurately determining the presence or absence of a child and alerting users through textual, visual, or audio data, thereby reducing the risk of children being left unattended.

Implementation Method 1

a laser component comprising at least a laser beam that exits the body component at a location

Methodology Applied

Scientific EffectLaser beam interruption detection: Laser

Data Source

PatentUS12330536B2Child car seat occupation detection using a laser

Publication Date: 2025.06.17 SLS INNOVATIONS LLC

AI summary

A system is described herein. The system includes at least a computing device and an occupation device. The computing device includes an engine and a graphical user interface (GUI). The occupation deice is affixed to a car seat in a vehicle. The occupation device is configured to determine a presence or an absence of a child in the car seat. Specifically, the occupation device includes electrical components and a laser component comprising at least a laser beam that exits a body component of the occupation device at a location. When the laser beam is uninterrupted, the electrical components are configured to transmit a first alert to the engine of the computing device for display to a user via the GUI. When the laser beam is interrupted, the electrical components are configured to transmit a second alert to the engine of the computing device for display to the user via the GUI.