Department of Automotive Engineering and Transport, Kielce University of Technology, Avenue Tysiaclecia Państwa Polskiego 7, 25-314 Kielce, Poland.
Department of Mechanical Engineering, Institute of Vehicles and Transportation, Military University of Technology (WAT), ul. gen. Sylwestra Kaliskiego 2, 00-908 Warsaw, Poland.
Sensors (Basel). 2021 Dec 9;21(24):8230. doi: 10.3390/s21248230.
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.
本文探讨了儿童在乘车时坐在儿童座椅上所受到的垂直振动的影响问题。其目的是评估儿童座椅的固定方式和道路状况对儿童座椅上记录的振动水平的影响。本文介绍了测试用的儿童座椅、测试方法和测量轨道中包含的测试设备。测试是在实际道路条件下进行的，儿童座椅位于乘用车的后排座椅上。一个用标准安全带固定，另一个用 ISOFIX 底座固定。在三种不同路面类型的道路上行驶时，测量了以下垂直加速度：儿童座椅的座位、车辆的后排座椅和 ISOfix 底座。记录的加速度首先在时域中进行分析，然后在频域中进行分析。使用三个指标（r.m.s、rmq 和 VDV）评估振动舒适度。研究表明，用标准安全带固定儿童座椅的经典方法在振动舒适度方面更具优势。计算指标证实了使用 IQ ISOFIX 底座将儿童座椅与车辆后排座椅分离会产生负面影响。
