Abstract
This paper propose an instrumented insole system developed to analyse Vertical Ground Reaction Forces (VGRF) of human motion. Such analysis is important in assessments of individual with movement disorders such as Cerebral Palsy or spasticities of lower extremities. The wearable system was developed utilising Force Sensing Resistors, Flex Sensors embedded in a shoe insole. In addition, the signal conditioning, and data acquisition circuitries consisting Arduino Leonardo board, and SKXBee wireless modules. A Labview-based real-time data collection software was developed to store, display, and analyse VGRF data of walking gait. The system is capable of providing kinetics parameters of movements with associated pressure distribution exerted on the foot during locomotion. Data collection were collected from 30 volunteers. Results obtained by the system are comparable with published database that is between 1.0 - 2.0 times of body weight for walking. It is envisioned that this system will form part of a full-body wearable instrumentation system that incorporates upper-extremities movement analysis subsystem to provide overall gait analysis for individual with movement disorders. Furthermore, it is also anticipated that such movement analysis system would aid in long-term monitoring of individual with movement disorder to monitor effectiveness of various rehabilitation programs. In view of the overall development cost of this system is USD 200, it is envisioned that the developed system will be an affordable system to be owned by any caretakers of individuals with movement disorders. As such, this system will supplement the normal or conventional analyses done on analysing gait of individuals with movement disorder in gait laboratories, which is costly, and less accessible compared to continuous or long-term monitoring.KeywordsBiomechanicsMovement Analysis SystemWearable DevicesMovement DisordersInstrumented Insole
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