Design Of And Research On Human Plantar Pressure And Balance Function Evaluation System

Balancing function represents the capability of human body tomaintain posture stabilization, as well as the ability to keep stabilizationagainst external force. Body balance function assessment plays animportant role in guiding rehabilitation of lower limb disabilities, aidsinstallation and adaptability training. Existing human balance functionassessment is based solely on six-component force or plantar pressuredistribution. While for lower limb disabilities whose skeletal structure offoot has pathologically changed, the accurate balance function assessmentrelys on comprehensive information including six-component force andplantar pressure distribution. The research of this thesis is focused on thekey technology of synchronous data acquisition and systemimplementation.The implemented integrated force measurement system is composedof the six-component force measurement module, the1404-element platarpressure distribution measurement module, FPGA chip ep3c16based dataacquisition module, data transmission module, data processing and userinterface, which features of synchronous data acquisition and online dataanalysis.By means of zero-potential method, crosstalk among array elementsof pressure mapping system is effectively suppressed. Based on theanalysis of the noise mechanism of the system, a hybrid noise filteringalgorithms is proposed. Impulse noise is identified by using boundarytemplate and removed by median filter firstly; then a threshold adaptivemedian filter is used to reduce Gaussian noise. Experiments results showthat the proposed method demonstrates stronger capability in impulsenoise and Gaussian noise reduction, and significantly improves the effect of the pressure contours.