Laboratory Tests of the Control of the Child Seats using Method for the Vibration Comfort of Children Transported in Them

Andrzej Zuska,Damian Frej,Emilia Szumska

doi:10.26552/com.c.2021.3.b187-b199

Abstract

The article presents results of the laboratory studies of the impact of the child seats mounting method on the vibration comfort of children transported in them. The tested child seats were mounted forward facing the rear seat of a passenger car. The A seat was fastened with the ISOFIX base, while the B seat was fastened with standard car seat belts. During the tests, values of the vertical vibrations were measured on the seat of the child seat, the rear seat of the vehicle and the ISOFIX base. It was noted that the analyzed system, may be characterized by two different vibration transmission chains, which depend on the child seat mounting system (classic seat mounting system and ISOFIX system). These studies show the negative impact of using the ISOFIX base, which is confirmed by the Root Mean Square (RMS) values and the Vibration Dose Value (VDV), determined for the "A" seat secured with the ISOFIX base that were higher than the RMS and VDV for the "B" classic mounted seat.

Highlights

In many countries, transporting children in vehicles is possible only with use of appropriate seats, the purpose of which is to protect the children placed in them against the adverse effects of road accidents
Results of the Vibration Dose Value (VDV) indicator are presented in figures 17-22 Based on the recorded accelerations, the VDV of the ISOFIX base and the VDV of the rear seat were determined
The increase in pressure in the test vehicle wheels increased the difference between the VDV of the ISOFIX base and the VDV of the rear seat

Summary

Introduction

In many countries, transporting children in vehicles is possible only with use of appropriate seats, the purpose of which is to protect the children placed in them against the adverse effects of road accidents. Most scientists confirm that one of the main causes of serious injuries and even death of children involved in road accidents is incorrectly fastening the child in the seat. The authors found that more than half of the children involved in these accidents were not properly restrained in the vehicle seat. In order to meet social expectations, the authors of the work [5] developed an application for a smartphone, instructing how to properly install the vehicle seat in a vehicle. This application was subject to a questionnaire assessment, which shows that 100% of respondents found it useful and helpful

Methods

Results

Conclusion