具有安全防护功能的智能盲人服设计

针对盲人出行困难及安全性不足的问题,从智能服装设计角度提出一种具有安全防护功能的盲人服。从警示功能与防护功能角度出发,在服装胸、腰、手腕处缝制反光条,在颈、胯、手肘、膝盖部位缝制可拆卸式气囊;从盲人日常出行需求出发,利用嵌入式技术为服装载体设计探路功能、摔倒检测与防护功能、未起身报警功能;利用基于支持向量机的特征值提取方法确定摔倒判定的阈值。结果显示:相较于普通服装,盲人服在厚重感、宽松感方面的舒适性差,在七分制评分下其总体舒适性评分低0.14分;在距离20 m以内的昏暗环境中,盲人服具有评分“良好”的警示效果,其对左右障碍物辨识度可达100%;设置传感器合加速度与合角速度阈值为27.44 m/s²及60 (°)/s时, 系统对摔倒判定成功率可达100%;未起身报警功能可有效保护无法自行起身的穿着者,并通过短信与网页显示及时通知监护人。

Design of smart protective clothing for blind people

Aiming at the walk difficulty and deficient safety encountered by blind people, a smart protective clothing was proposed from the perspective of intelligent clothing design. To highlight the visibility of the wearers, reflective strips were added on the chest, waist and wrist of clothing, and detachable airbags were equipped on the neck, crotch, elbow and knee to provide protection. In addition, starting from the daily travel needs of the blinds, embedded sensor systems were used for path way exploration, fall detection and protection, and for warning when falling without standing up. The eigenvalue extraction method based on support-vector machine was used to determine the threshold value for fall judgment. The results show that compared with ordinary clothing, the comfort of the protective clothing is poor in heaviness and looseness, and the overall comfort score is 0.14 lower under the seven point system. The clothing achieves "good" score in sending warning signals in the dim environment within 20 m, and the recognition of the clothing pathfinding function to the side obstacles reaches 100%. The sensor acceleration and angular velocity threshold is 27.44 m/s² and 60 (°)/s with a success detect rate of 100%, and under the situation where none standing up is detected, the guardian of the wearer will be informed through short message and web page display.