Digital Research Of Functional Motion Screening (FMS) Based On Inertial Sensors

At present,the functional movement screening test(Functional Movement Screen,FMS)scoring is mainly based on manual methods,which are carried out by testers based on personal professional knowledge and evaluation experience.Subjective factors are greatly affected,and the scoring has higher professional requirements;in addition,manual The scoring method requires professional testers to sequentially score and evaluate the testees,which takes a long time,so accurate and fast evaluation cannot be achieved,and it cannot meet the needs of screening for a large number of people.Digital collection of human body posture through inertial sensors to realize the digitization of FMS testing and complete professional posture evaluation of human body movements can provide a certain reference for the future development of wearable device-based human posture evaluation systems and evaluation service software systems.In this thesis,a digital evaluation index based on inertial sensors is established based on the FMS test method and manual scoring standards.Select 50 subjects,wear inertial sensors one by one,and run Axis Studio software at the same time.Perform the FMS test on the subjects.While manually scoring on site,the motion data of each subject’s seven movements are recorded through the Axis Studio software and the BVH file and.mbx file are saved.Finally,the data files are calculated and compared.According to statistics,the seven actions of the FMS test with different scores are based on the threshold value of the digital evaluation index of the inertial sensor.The main findings are as follows:Based on the inertial sensor,the digital evaluation index of FMS testing 7 actions is established,and the threshold value of different scores is obtained through the calculation and statistics of the data file.The digital evaluation indicators of the 7 movements in the FMS test are as follows: Action 1:(1)the rotation angle of the shoulder joint in the sagittal plane;(2)the thigh angle;(3)the minimum angle of the trunk tibia.Action 2:(1)Thigh angle;(2)Frontal swing angle;(3)Sagittal swing angle;(4)Shoulder joint rotation angle in the sagittal plane.Action 3:(1)Frontal angle of the torso;(2)Side angle of the torso;(3)The rotation angle of the foot on the frontal plane.Action 4:(1)The rotation angle of the upper shoulder joint in the sagittal plane;(2)The rotation angle of the lower forearm in the frontal plane.Action five: the maximum angle of the thigh.Action six: torso-thigh angle.Action seven: the torso rotation angle.Based on the above results,the following conclusions are drawn: 1.According to the method and scoring standard of functional action screening test,a digital evaluation index based on inertial sensors is established through experimental research methods.2.The subject wears an inertial sensor and performs FMS testing.The three scorers perform on-site scoring and Axis Studio software to record the subject’s motion data at the same time.Through the calculation and statistics of the data file,the FMS established based on the inertial sensor is obtained.Test the thresholds for different scores of digital evaluation indicators.3.Through the verification experiment,the agreement between the score of the digital evaluation index and threshold value of the FMS test established based on the inertial sensor and the final score of the manual score is greater than 94.2%.