Vibration characterisation of strollers and cargo bicycles for transporting infants over different road surfaces
本研究使用ISO全身振动标准，测量了五种婴儿车和两种货运自行车在六种路面上对0、3、9个月婴儿假人的振动，发现鹅卵石和砖块路面振动极强，建议限制暴露时间并改进设计。
The objective of this study was to comprehensively evaluate vibrations with dummies representing infants aged 0, 3, and 9 months lying or sitting in five strollers and two cargo bicycles with dedicated baby seats on six common road surfaces using the ISO standard for whole-body vibration. Strollers induced on average 0.4 ms−2 on tarmac and up to 5.0 ms−2 on cobblestones at a mean walking speed of 5.3 km h−1. Cargo bicycles induced on average 0.6 ms−2 on tarmac and up to 10.7 ms−2 at 25 km h−1 on paver bricks. The standard suggests the highest accelerations for strollers and cargo bicycles are extremely uncomfortable and continuous exposure should be limited to less than 10 min. Vintage strollers have reduced vibrations compared to modern strollers, indicating benefits of compliant suspensions. We recommend that designers systematically consider vibration, users avoid prolonged exposure to surfaces rougher than tarmac, and researchers pursue scientifically founded test procedures and standards for infant vibration.