Study On The Plantar Ground Reaction Force Distribution Measuring System And Its Application

It is important to measure and analyze the distribution characteristics of the plantar ground reaction force for the prediction,diagnosis and treatment of some related diseases.In this paper,a plantar force distribution measurement system for a person with a foot length of 38 to 43 codes is developed.in view of the shortcoming of the current plantar force measured,such as short life and small adaptive range.Firstly,based on the characteristics of standing and dynamic plantar forces and combined with the data of the foot bones of 27 healthy people collected,a method of plantar zoning measurement is proposed,which divides the plantar into three measurement areas: the first head of metatarsal bone and the phalanx,the second to fifth head of metatarsal bone and the phalange,and the heel.A plantar ground reaction force detecting device adapted to 38?43 codes and joint angle detecting device.are designed.Secondly,based on the NI CompactRIO embedded platform,the sensor signal acquisition system is designed,and the Labview software is used to develop the standing and dynamic plantar ground reaction force display interface,which realizes the data collection,processing,display and storage functions.Then,test system measurement error.The system is used to collect the planter ground reaction force of various parts of 20 healthy subjects with 38?43 codes and the changes of the plantar force of 5 healthy subjects with 38?43 codes in the state of squatting to up,sitting to standing.Results show that the distribution of the plantar ground reaction forces in different parts of different people is consistent in standing,the percentage of ground reaction force on each part of the left and right feet to body weight is as follows:the first metatarsal head and phalanx is 4.35% ± 1.95%,the second to fifth of metatarsal head and phalange is 13.54% ± 5.03%,the forefoot is 17.89% ± 3.95% and the heel is 32.11% ± 4.08%.The results further verify the precision of the system in the division of three regions of the plantar of different populations.During the squatting-up,sitting-stationing process,when the knee joint and hip joint start to rotate and is going to be reach the maximum turning angle,the left and right plantar force are rapidly changed,and this position of the healthy person is easy to fall,which may be brain damage.It can provide guidance for preventing falls in patients with brain damage.The correlation between the percentage of various parts of the plantar to body weight and the height,weight and body mass index of the experimenter is analyzed.The results showed that correlation between the plantar ground reaction force of forefoot of the right and theweight,the first metatarsal and phalanx of the right and the body mass index was weakly,the correlation between the plantar ground reaction force of other parts to body weight and the height,weight and body mass index is irrelevant.The results show that the percentage of various parts of the plantar to body weight is effective as a characteristic parameter of the plantar force distribution,which proves that the system can satisfy the measurement needs of people with a foot length from 38 to 43 codes.The distribution characteristics of plantar force in healthy people were obtained,which laid a foundation for the application of plantar force in rehabilitation field.Finally,based on the plantar force distribution measurement system and collecting the information of the plantar force distribution in standing,the balance ability detection and balance training system,the quantitative diagnosis system for the foot deformation caused by stroke and internal and external valgus and a rehabilitation estimation system of lower limb fracture are developed and apply in the clinical medical field.