In 2021, there were 2,338 accidents involving children up to the age of 14 on Polish roads, of which 1,922 were injured and 50 died. Children were most often involved in accidents as passengers in vehicles and pedestrians. Afternoon hours and built-up areas, where traffic is the highest, proved to be particularly dangerous. Despite the general downward trend in the number of accidents, the number of fatalities in this age group remains worrying and requires further preventive and educational measures. Considering the amount of time spent in a vehicle due to the intensity of our lives, the topic of transferring vertical vibrations through vehicle elements to car seats was raised. Safe transportation of children in a car is not only a legal obligation, but above all a key element of protecting their health and life. A car seat, properly selected for the child’s height, weight and age, significantly increases the chances of avoiding serious injuries in the event of an accident - even at low speed. Unfortunately, statistics show that in Poland many children are still improperly secured in vehicles, which can lead to tragic consequences. Proper installation and use of the seat are of great importance, which is why educating parents and guardians in this area is so important. In recent years, numerous social campaigns and information activities have been undertaken to increase awareness of the safe transportation of the youngest passengers. The objective of this study is to conduct an experiment comparing vertical vibrations in child car seats with integrated swivel bases. The article addresses the issue of vertical accelerations acting on a child seated in a car seat attached to a swivel base. The activities undertaken in this work aim to verify vertical vibrations in child car seats produced by leading manufacturers in the industry. The child car seats used in the experiment have a base integrated with the car seat. In these models, the base is not a detachable element. There are also car seats available on the market that have a universal base for several age and weight categories of seats, and these are detachable. In this study, seats for children in the 0-13 kg age category were used. The tests are carried out on an MTS test stand. Four seats of three popular brands were tested. The seats differ in weight, the material they are made of, and the shape of the swivel base.
Grabski et al. (Thu,) studied this question.