Power backpack design based on human kinetic energy harvesting
                                                                                 WANG Junlong 1,2,3
(1.Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China; 2.School of Information Science and Technology, Shanghai Tech University, Shanghai 201210,China; 3.University of Chinese Academy of Sciences, Beijing 100049,China)

Abstract: 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 3D 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.

Key words: energy harvesting backpack; human walking; generation model; oneway bearing; no obstruct human movement