Publikacje

Abstract:

This paper deals with the issues of the impact of vertical vibrations on a child seated in
a child seat during a journey. Its purpose was to assess the impact of fastening the child seats and
road conditions on the level of vibrations recorded on child seats. The paper describes the tested
child seats, the methodology of the tests and the test apparatus included in the measuring track. The
tests were carried out in real road conditions where the child seats were located on the rear seat
of a passenger vehicle. One was attached with standard seat belts, and the other with the ISOFIX
base. When driving on roads with three types of surface, the following vertical accelerations were
measured: seat of the child seats, the rear seat of the vehicle and the ISOfix base. The recorded
accelerations were first analyzed in the time domain and then in the frequency domain. Three indexes
(r.m.s, rmq and VDV) were used to assess the vibration comfort. Research has shown that the classic
method of fastening a child seat with standard seat belts is more advantageous in terms of vibration
comfort. Calculated indicators confirmed the negative impact of separating the child seat from the
rear seat of the vehicle using the IQ ISOFIX base.

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Research and Analysis of the Propagation of Vertical Vibrations in the Arrangement of a Vehicle Seat—A Child’s Seat