Analysis and selection of the Force Sensitive Resistors for gait characterisation

Abstract

Force Sensitive Resistors (FSRs) are used for kinetic evaluation of human gait by measuring under foot pressures during gait. FSRs from different manufacturers, with variation in morphologies and loading capacities were selected in past research projects. However a functional comparison of different FSRs and options on how to choose them for gait analysis is not established yet. In this work, investigation and comparison of behavioral patterns in measuring normal gait from two major FSR sensors are done. These FSRs had been utilised previously for the purpose of gait sensing. They were placed underneath the heel alternatively to detect heel pressures while wearing footwear with laces and with another footwear possessing straps for harnessing. Both sensors are connected to a miniature low power wireless senor node used for data collection and wireless transmission for off-line analysis of pressure patterns. The results give good indications on capabilities and trade-offs when using the two sensors types.

Real-Time Gait Phase Detection Using Wearable Sensors for Transtibial Prosthesis Based on a kNN Algorithm

“…The insole device developed in this study consists of three main components, as shown in Figure 1a. Firstly, five plantar force sensors (FSR-402, Interlink Electronics, Camarillo, CA, USA) are attached to the bottom of the insole sheet (S 1 -S 5 ) to receive the force exerted on the foot as you walk [14,15]. The sensor positions are shown in Figure 1b, though they change according to the shape of the wearer's foot.…”

Fall detection smart-shoe enabled with wireless IoT device

“…Ozdemir and Barshan (2014) developed multi-sensor systems attached across the body to produce higher performance modules, but because of system complexity and discomfort it was impractical for everyday life. Shaikh et al (2015) investigated and compared behavioral patterns in measuring normal gait from two FSR sensors, FSR401 and FSR402, which led to FSR401 being termed as the optimum choice of sensor. Wu et al (2015) developed a wearable device using a single tri-axial accelerometer, which is placed on the user's waist but failed because of user's discomfort.…”

Determination of Lying Posture through Recognition of Multitier Body Parts

“…Their specified switching time delay was 1 ms. The FSR 406 sensor in Figure 4 [18] is more sensitive to forces with lower magnitude, being able to distinctively respond to forces as low as 20 g [19]. Considering cheap and reliable force sensor, it can be a suitable candidate to measure the force during interaction [17].…”