Child Restraint Event Data Recorder for Installation Monitoring
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Solution Overview
Problem
Current child restraint systems lack effective means to ensure proper installation and adjustment, and there is a need to store data related to these conditions for post-incident analysis, particularly in the event of a vehicle accident.
Innovation Solution
An electronic control unit with sensors and an event data recorder is integrated into the child restraint system to monitor and store data on installation and adjustment conditions, including weight, tension, and orientation, which can be retrieved later for assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors and electronic control unit are integrated into the child restraint system to monitor installation and adjustment conditions, then the ability to detect and record installation status is improved, but the device complexity increases
Solution Approach 1:
The electronic control unit serves multiple functions: it processes signals from multiple sensors (weight sensor, tension sensor, orientation sensor), stores data in an event data recorder, provides user feedback through display, and controls alert mechanisms. This multi-functionality consolidates what could be separate systems into a single integrated control unit, improving measurement capabilities while limiting complexity growth through functional integration.
Solution Approach 2:
The patent implements a hierarchical structure where sensors are embedded within the child restraint system components, their signals are processed by the electronic control unit which contains an event data recorder, and the entire system is integrated into the child seat assembly. This nested arrangement allows multiple detection functions to coexist within the compact child restraint structure without proportionally increasing external complexity.
2Reliability
If an event data recorder is added to store data for later retrieval, then the reliability of post-incident analysis is improved, but the device complexity and cost increase
Solution Approach 1:
The event data recorder continuously stores installation and adjustment data before any incident occurs. By pre-recording this information, the system ensures that critical data is available immediately after an accident without requiring complex post-incident data collection procedures. This preliminary data capture improves reliability of analysis while using a relatively simple storage and retrieval mechanism.
Solution Approach 2:
The event data recorder acts as an intermediary between the sensors and the post-incident analysis process. Instead of requiring direct connection between sensors and analysts, the recorder stores data in a standardized format that can be easily retrieved and analyzed later, simplifying the overall system architecture while improving data reliability for investigations.
3Measurement precision
If multiple sensors are used to monitor weight, tension, and orientation, then the measurement precision of installation conditions is improved, but the loss of information increases due to more data parameters to manage
Solution Approach 1:
The electronic control unit merges data from multiple independent sensors (weight sensor measuring child weight, tension sensor measuring harness tension, orientation sensor measuring seat angle) into a unified assessment of installation correctness. By integrating these measurements and processing them together, the system improves comprehensive evaluation of installation conditions while managing information through centralized processing rather than separate analysis streams.
Solution Approach 2:
The system provides feedback to the user through the display device, showing whether installation conditions are correct or incorrect based on sensor data. This feedback mechanism translates complex multi-parameter sensor information into simple, actionable guidance for the user, effectively managing information flow from multiple sensors while preventing information overload by presenting only the most relevant installation status.
Data Source
AI summary
A child restraint system includes an electronic control unit having an event data recorder for storing data relating to proper adjustment or installation of the child restraint system. The control unit receives an electrical signal from one or more sensors mounted on the child seat and determines conditions of the child seat based upon the value of the property indicated by the signal. The event data recorder is configured to store the resulting data and to allow the stored data to be retrieved in response to an inquiry. Thus, in the event of a vehicle accident or other incident, the electronic control unit may be connected to an external diagnostic unit, and the relevant data may be downloaded to the diagnostic unit for evaluation.