基于人体动能收集的供电背包设计

Power backpack design based on human kinetic energy harvesting

针对现有发电背包需要外框架结构、重负载、只收集竖直方向上的振动能量、影响人体运动姿态等问题,对人体行走时背包与后背之间竖直和水平晃动位移的大小、背包发电装置模型、背包能量输出的功率变化、发电背包对人体运动姿态的影响等方面进行了研究。对人体行走时背包与后背之间相对晃动位移的规律进行了归纳,提出了基于背包位移晃动规律,设计了无需外框架和重负载的拉绳驱动发电背包方案,利用3D打印机制作了发电背包装置模型,并通过跑步机、拉力和惯性传感器,对背包输出的能量和人体下肢关节的变化角度等数据进行了测量和理论验证。研究结果表明:该发电背包在人体行走速度为1. 11 m/s,自重为1. 5 kg的情况下,可收集到大约0. 3 w的能量,能量收集过程对人体行走姿态基本无影响。

Aiming at the existing power backpacks need frame and heavy loads to collect energy,only focused on harvesting energy in the vertical vibration,affect the position of human movement,the research about horizontal and vertical displacement between back and backpack,model of backpacker generator,output power of backpack energy,and the effect of power backpack on human motion gait was presented. The law of relative displacement between the backpack and the back when the human walking was summarized,a power backpack solution based on the law of displacement between the backpack and the back without external frame and heavy load was proposed. The backpack generator model was made by 3 D printer and the output energy of the backpack,the angle change of the joints of the human lower limbs were measured,theoretically of generator was verified,through the treadmill,tension and inertial sensors. The results indicate that when the walking speed is 1. 11 m/s and the weight of the backpack is 1. 5 kg,about 0. 3 w energy can be harvested,no influence on the walking posture of the human.