Backpacks are becoming more and more popular as ineveryday life of a modern person, and during outdoor activities. A group of scientists from the United States and China have created an innovative backpack that can reduce the inertial acceleration of a load and thereby lighten the load experienced by the user during the transfer of weight.
When walking, a person moves forward,however, when shifting the legs, it shifts slightly up and down. In the case when there is a backpack on the back, during such displacements, the load receives cyclical accelerations directed alternately up and down. In this case, the total load on the user consists of the sum of the backpack weight and the inertial component.
The idea of creating inertial backpacks was put forward byAmerican scientist Lawrence Rome in 2006. The design principle consists in hanging the main part of the backpack on blocks and elastic cables passing through them. The elastic cables absorb the forces caused by vertical acceleration when walking.
12 years later, Chinese engineers ledTsai-Hua Xiong from Huazhong University of Science and Technology has created a commercial backpack, but with active elements that can reduce the inertial component of the force acting on the body by 98.5%.
Inertial backpack attaches to the shoulder straps and beltuser, and on the back there is a plate, in the center of which a movable load attachment is located. During testing, it was found that a user with an inertial backpack uses 11% less energy when moving than a person with a traditional backpack.