School of Engineering [Mechanical and Automotive], RMIT University, Bundoora, Melbourne, VIC 3083, Australia.
School of Engineering [Mechanical and Automotive], RMIT University, Bundoora, Melbourne, VIC 3083, Australia.
Appl Ergon. 2018 Apr;68:240-248. doi: 10.1016/j.apergo.2017.12.002. Epub 2017 Dec 14.
Research has demonstrated that a better-fitted bicycle helmet offers improved protection to the rider during an impact. Nowadays, bicycle helmets in the market that range in size from small/medium to medium/large might not fit the diverse range of human head shapes and dimensions. 3D scanning was used to create 3D head shape databases of 20 participants who volunteered for the study. We developed new custom-fitted helmet inner liners, based on the 3D head shape of two sub-groups of participants, to map their head sizes and contours closely to the conventional Medium (M) and Large (L) sizes as described in from AS/NZS 2512.1: 2009. The new custom-fitted helmet was compared with the helmet available in the market place in a dynamics stability test and from participants' subjective feedback. A significant reduction in the angle of helmet rotation on the headform in the lateral direction was recorded for the custom-fitted helmet. A Wilcoxon signed-rank test was conducted to evaluate participants' feedback on the helmets according to different area definitions. The overall fit and comfort and the top region of the new helmet were significantly improved. However, no difference was found at the significant level of 0.05 for the front and rear region of the new helmet.
研究表明，在撞击过程中，合适的自行车头盔能为骑手提供更好的保护。目前，市场上的自行车头盔尺寸从小号/中号到中号/大号不等，但可能无法适应各种不同的头型和尺寸。我们使用 3D 扫描技术创建了 20 名志愿者的 3D 头型数据库。我们根据其中两个子组参与者的 3D 头型，为他们开发了新的定制头盔衬垫，以使其头围和轮廓紧密贴合 AS/NZS 2512.1:2009 中所描述的常规中号（M）和大号（L）尺寸。我们在动态稳定性测试中比较了新定制头盔与市场上现有头盔，并从参与者的主观反馈中获得了信息。结果显示，在侧向方向上，头盔在头模上的旋转角度明显减小。我们使用 Wilcoxon 符号秩检验，根据不同的区域定义评估参与者对头盔的反馈。新头盔的整体贴合度、舒适度和顶部区域都有显著提高。但是，新头盔的前、后区域在 0.05 的显著水平上没有差异。
