Study on Human Slip and Fall Gaits Based on 3D Gait Analysis System

摘要

Slip and fall is a serious problem which affects the health and safety of people, and it has become a hot topic in the ergonomics and biomedicine fields in recent years. The causes of slip and fall accidents including external causes and internal causes. And it is the body response coordination ability under the condition of instability that is one of the important internal causes and plays a key role in causing slip and fall accidents. On the sports psychology, total time (TT) is defined as the sum of reaction time and movement time and it can be used to measure the body response coordination ability. Slip and fall probability (FP) is the frequency of occurrence of slip and fall accidents. When external conditions are consistent, to a certain extent, different FP reflects the difference of body response coordination ability. Theoretically, TT and FP should have a certain relationship, but the detail is unknown. With the development of computer technology, the 3D gaits analysis system has appeared and the study of slip and fall accidents was promoted depending on its powerful functions. Based on the 3D gaits analysis system, this paper innovatively listed the topic as study content and got the study result: the relationship between TT and FP is significant correlation under the 0.01 level. By using the datum, images and videos exported from the system, this paper conducted the gait analysis and verified the reliability of the correlation: different TT lead to different foot-ground contact force, thus lead to different body response coordination ability, namely FP. Therefore, it is very effective to use the 3D gait analysis system to study the slip and fall accidents.