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Preliminary assessment of vibrations received by children in gondola strollers
Magdalena Kromka-Szydek1, Gabriela Chwalik-Pilszyk1, Zygmunt Dziechciowski2
11Department of Applied Mechanics and Biomechanics, Faculty of Mechanical Engineering, Cracow University of Technology, Kraków, Poland.
Insights
Baby stroller vibrations exceed safety limits, potentially harming infants. Current standards (ISO 2631) are for adults, highlighting the need for child-specific vibration guidelines.
Area of Science:
- Biomechanics
- Pediatric Health
- Transportation Safety
Background:
- Infant safety during transportation is crucial.
- Whole-body vibrations can impact human health.
- Existing vibration standards (ISO 2631) are designed for adults.
Purpose of the Study:
- To assess the potential hazards of baby stroller vibrations to infants.
- To measure whole-body vibrations experienced inside baby strollers.
- To compare measured vibrations against established safety standards.
Main Methods:
- Utilized a 5 kg dummy infant for vibration measurement.
- Tested four baby strollers of similar weight and design.
- Measured whole-body vibrations within the strollers during use.
Main Results:
- Vibrations in baby strollers exceeded the comfort limits defined by ISO 2631.
- Exceeded comfort limits occurred at frequencies matching infant head and torso resonance.
- ISO 2631 is a guideline only, as it's intended for adults.
Conclusions:
- A need exists for developing specific vibration standards for children.
- Infant exposure to stroller vibrations may pose a health risk.
- Stroller speed and driving technique significantly influence vibration magnitude.
Abstract:
Purpose: In this study, the authors attempted to determine whether and to what extent the vibrations generated while driving a baby stroller could pose a potential hazard to an infant. For this purpose, the measurement of whole body vibrations inside a baby stroller was carried out, using a dummy infant weighing 5 kg. Methods: The study was conducted using four baby strollers of similar overall weight and design. Based on the results, it was concluded that the vibrations occurring in the baby stroller exceed the comfort limit defined by ISO 2631 and could be potentially dangerous to children. Results: The comfort limit for the vertical axis is exceeded in the frequency range that corresponds to the resonant frequencies of the head (6-8 Hz), torso (6-17 Hz) or pelvis (6-17 Hz). For this type of study, the ISO 2631 standard can only be considered as a guideline in analyzing the results since the standard is intended for adults. There is no norm in the literature that defines the limit of vibrations acting on children. Conclusions: It seems necessary to develop a standard specifically for children. Based on the results obtained, the effect of speed and the way of driving a baby carriage on the magnitude of vibration received is evident.
