Analysis of vertical vibrations affecting a child transported in a child seat during a car passing over the release speed bump

Damian Frej,Karin Cadge,Andrzej Zuska

doi:10.14669/am.vol86.art8

Abstract

The article presents the results of research on the assessment of vibrational comfort of children carried in child seats. The work analyzes the impact of the child's mass and the speed of the car passing through the speed bump on the level of vibration to which the passenger (child) transported in the child seat mounted on the rear seat of the car is exposed. The tested car seats were installed in a passenger car using the ISOfix base. During the tests, the measured values were the acceleration of the seat child seat, the backrest of the child seat, the rear seat of the car and the child seat ISOfix base. As part of the research, car drive through the speed bump were carried out at different car speeds and with different mass simulating the mass of a child. The test results were analyzed in order to determine the magnitude of vibrations generated during car drive through the speed bump. Based on the results obtained, the level of vibrational comfort of a child trip in a child seat was assessed.

Highlights

IntroductionWith the development of the economy and the manufacturing process of cars, the number of vehicles is constantly growing worldwide
Based on accelerations r.m.s., it can be concluded that the vibrations of the seats of the tested child seats, loaded with a mass of 15 kg, do not cause discomfort when car traverses the speed bump with a speed of 10 km/h and 20 km/h
In most tests, increasing the speed of the car traversing the speed bump caused increasing the effective values of r.m.s. accelerations recorded both on the seats and backrests of the car child seats tested

Summary

Introduction

With the development of the economy and the manufacturing process of cars, the number of vehicles is constantly growing worldwide. The manufactured cars have more and more sensors supervising the driver's operation, improving safety or facilitating the use of the car [3, 6, 22]. The vast majority of the society uses the car every day when commuting to work, school or shopping. A positive aspect related to the progress of the car manufacturing is the increase in the standard of living of society. There are negative aspects such as the increase in traffic, the lack of parking spaces and the increased number of road accidents [2]. Modern society is increasingly choosing to transport by private car instead of public transport. Travelling by car we are exposed to many dangers including to health harmful vibrations [1, 10, 16]

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