Proposal on the prevention and control of scoliosis in children and adolescents as soon as possible in the National Two Sessions in 2020: At present, there are more than 3 million scoliosis patients in my country, and it is increasing at a rate of 300000 per year, of which more than half are adolescents. Scoliosis has become the third "killer" of children and adolescents in China after obesity and myopia, and the situation of prevention and control is grim. On November 1, 2021, the Disease Control and Prevention Bureau of the National Health Commission organized and compiled the "Technical Guidelines for the Prevention and Control of Abnormal Spinal Curves in Children and Adolescents", which pointed out that the abnormal spinal curvature screening project should be included in the physical examination of each academic year or freshmen. However, the existing spinal detector such as X-ray, CT and other light and shadow equipment has electromagnetic radiation, the equipment is complex, the size is huge, the applicable place is fixed, and professionals are required to standardize the operation on site. It cannot really achieve extensive inspection, rapid screening and early screening, resulting in late detection of diseases and great health hazards. In order to solve the problem of how to screen the abnormal spine morphology of teenagers and children safely, effectively, quickly and timely, this project has developed and launched a portable, lightweight and rapid spinal morphology screening device, which can automatically identify the spine morphology, build a three-dimensional spine model, and intelligently push measurement reports and risk tips. The results of this project can be used in primary and secondary schools, national physical fitness monitoring centers, community health centers, physical examination centers, etc. for rapid screening of adolescent spinal abnormal groups; at the same time, it can also be used for the rehabilitation department of the hospital, the sports medicine research institute of scientific research institutes, Health care laboratories, etc. provide scientific research data support. This project is dedicated to solve the problem of portable measurement of spine shape detection, and design a portable spine shape detection device for users of different spine types. The device can easily obtain a three-dimensional space model of the spine. Studying major scientific issues such as gait behavior characteristics of adolescents and children with abnormal spinal development, the dose-effect relationship and mapping model between abnormal spinal development and balanced gait, breaking through engineering technologies such as spinal morphological data acquisition based on inertial sensors, accurate reconstruction of three-dimensional spinal models, and spinal morphological evaluation based on artificial intelligence, and developing portable, low-cost and lightweight spinal abnormal morphological screening equipment, shorten single scan time, improve screening speed and accuracy. Through medical analysis of the three-dimensional model of the spine by doctors and other professionals, scientific health guidance is given to the subject, so as to achieve the effect of preventing and treating spinal related diseases. And this equipment is light and easy to operate, suitable for a variety of complex environments, little affected by the external environment, has a good medical and commercial prospects. In order to easily obtain the outer contour signal of the human spine, the project adopts the following technical scheme: by using a special "trolley" type spine detection device with a nine-axis sensor built in to carry out back-to-back movement, and collecting and analyzing the spatial data in the sensor movement process, the outer contour information of the spine is obtained, which is visually displayed in the upper computer software and gives guidance.