scholarly journals H10 Estimation of reaction force by using plantar pressure sensor : Simplification of calibration method

2005 ◽  
Vol 2005 (0) ◽  
pp. 162-166
Author(s):  
Yoshio INOUE ◽  
Kyoko SHBATA
Keyword(s):  
Pressure Sensor ◽  
Plantar Pressure ◽  
Reaction Force ◽  
Calibration Method

214 Reaction Force Estimation by Using Plantar Pressure Sensor

2005 ◽  
Vol 2005.43 (0) ◽  
pp. 67-68
Author(s):  
Yohei YAMASAKI ◽  
Yoshio INOUE ◽  
Kyoko SHIBATA ◽  
Takuya MATSUDA ◽  
Hiroki TAMURA
Keyword(s):  
Pressure Sensor ◽  
Plantar Pressure ◽  
Reaction Force ◽  
Force Estimation

scholarly journals The Design and Simulation of a 16-Sensors Plantar Pressure Insole Layout for Different Applications: From Sports to Clinics, a Pilot Study

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1450
Author(s):  
Alfredo Ciniglio ◽  
Annamaria Guiotto ◽  
Fabiola Spolaor ◽  
Zimi Sawacha
Keyword(s):  
Pressure Distribution ◽  
Plantar Pressure ◽  
Center Of Pressure ◽  
Reaction Force ◽  
Weight Lifting ◽  
Lower Limbs ◽  
Plantar Pressure Distribution ◽  
Drop Landing ◽  
Mean Pressure ◽  
Footwear Design

The quantification of plantar pressure distribution is widely done in the diagnosis of lower limbs deformities, gait analysis, footwear design, and sport applications. To date, a number of pressure insole layouts have been proposed, with different configurations according to their applications. The goal of this study is to assess the validity of a 16-sensors (1.5 × 1.5 cm) pressure insole to detect plantar pressure distribution during different tasks in the clinic and sport domains. The data of 39 healthy adults, acquired with a Pedar-X® system (Novel GmbH, Munich, Germany) during walking, weight lifting, and drop landing, were used to simulate the insole. The sensors were distributed by considering the location of the peak pressure on all trials: 4 on the hindfoot, 3 on the midfoot, and 9 on the forefoot. The following variables were computed with both systems and compared by estimating the Root Mean Square Error (RMSE): Peak/Mean Pressure, Ground Reaction Force (GRF), Center of Pressure (COP), the distance between COP and the origin, the Contact Area. The lowest (0.61%) and highest (82.4%) RMSE values were detected during gait on the medial-lateral COP and the GRF, respectively. This approach could be used for testing different layouts on various applications prior to production.

scholarly journals Stress relaxation of the infusion tube with a pressure sensor

2018 ◽  
Vol 232 ◽  
pp. 04021
Author(s):  
Aoru Xie
Keyword(s):  
Stress Relaxation ◽  
Stress Distribution ◽  
Contact Pressure ◽  
Pressure Sensor ◽  
Reaction Force ◽  
Infusion Tube

We studied stress relaxation of the infusion tube with a pressure sensor using FEA method. The stress distribution in the tube, the contact pressure on the wall of the pressure sensor, the decay of the reaction force on the wall of the pressure sensor were determined, respectively. Due to the stress relaxation of the infusion tube, the reaction force generated by the tube deformation was decreased by over 75% as compared with the original reaction force in the first several seconds after the infusion tube was set into the pressure sensor.

scholarly journals A Development of Plantar Pressure Sensor for Foot Ulcer Detection in Diabetic Neuropathy Individuals – A Pilot Study

2020 ◽  
Vol 1535 ◽  
pp. 012019
Author(s):  
Nor Salwa Damanhuri ◽  
Nor Azlan Othman ◽  
Wan Fatimah Azzahra Wan Zaidi ◽  
Samihah Abdullah
Keyword(s):  
Pilot Study ◽  
Diabetic Neuropathy ◽  
Pressure Sensor ◽  
Plantar Pressure ◽  
Foot Ulcer ◽  
Ulcer Detection

Effect of Running Speed and Midsole Type on Foot Loading in Heel–Toe Running

2020 ◽  
Vol 36 (3) ◽  
pp. 134-140
Author(s):  
Piaolin Peng ◽  
Shaolan Ding ◽  
Zhikang Wang ◽  
Yifan Zhang ◽  
Jiahao Pan
Keyword(s):  
Vinyl Acetate ◽  
Ground Reaction Force ◽  
Plantar Pressure ◽  
Thermoplastic Polyurethane ◽  
Reaction Force ◽  
Ethylene Vinyl Acetate ◽  
Polyurethane Elastomer ◽  
Running Speed ◽  
Related Data ◽  
Foot Loading

The purpose of this study was to explore the immediate effects of running speed and midsole type on foot loading during heel–toe running. Fifteen healthy male college students were required to complete 3 running trials on an indoor 45-m tartan runway at 4 different speeds (3, 4, 5, and 6 m/s) using 2 different running footwear types (engineering thermoplastic polyurethane elastomer, polyurethane elastomer; and ethylene vinyl acetate, vinyl acetate). The ground reaction force and plantar pressure data were quantified. Significant speed effects were detected both in ground reaction force and plantar pressure-related data (P < .05). Vertical average loading rate was significantly less, and time to first peak occurred later for the polyurethane elastomer compared with vinyl acetate footwear (P < .05). The peak pressure of the heel, medial forefoot, central forefoot, lateral forefoot, and big toe was significantly less when subjects wore a polyurethane elastomer than vinyl acetate footwear (P < .05). Overall, our results suggested that, compared with the vinyl acetate footwear, the special polyurethane elastomer footwear that is adhered with thousands of polyurethane elastomer granules was effective at reducing the mechanical impact on the foot.

scholarly journals A Graphene-Based Flexible Pressure Sensor with Applications to Plantar Pressure Measurement and Gait Analysis

Materials ◽  
2017 ◽  
Vol 10 (9) ◽  
pp. 1068 ◽  
Author(s):  
Cunguang Lou ◽  
Shuo Wang ◽  
Tie Liang ◽  
Chenyao Pang ◽  
Lei Huang ◽  
...  
Keyword(s):  
Gait Analysis ◽  
Pressure Sensor ◽  
Pressure Measurement ◽  
Plantar Pressure ◽  
Plantar Pressure Measurement ◽  
Flexible Pressure Sensor

Assessing Plantar Pressure Distribution in Children with Flatfoot Arch

2014 ◽  
Vol 104 (6) ◽  
pp. 622-632 ◽  
Author(s):  
Jolanta Pauk ◽  
Mikhail Ihnatouski ◽  
Bijan Najafi
Keyword(s):  
Mathematical Model ◽  
Pressure Distribution ◽  
Body Mass ◽  
Plantar Pressure ◽  
Reaction Force ◽  
Retest Reliability ◽  
Plantar Pressure Distribution ◽  
Foot Posture ◽  
Test Retest Reliability ◽  
Pressure Magnitude

Background Flatfoot, or pes planus, is one of the most common foot posture problems in children that may lead to lower-extremity pain owing to a potential increase in plantar pressure. First, we compared plantar pressure distribution between children with and without flatfoot. Second, we examined the reliability and accuracy of a simple metric for characterization of foot posture: the Clarke angle. Third, we proposed a mathematical model to predict plantar pressure magnitude under the medial arch using body mass and the Clarke angle. Methods Sixty children with flatfoot and 33 aged-matched controls were recruited. Measurements included in-shoe plantar pressure distribution, ground reaction force, Clarke angle, and radiography assessment. The measured Clarke angle was compared with radiographic measurements, and its test-retest reliability was determined. A mathematical model was fitted to predict plantar pressure distribution under the medial arch using easy-to-measure variables (body mass and the Clarke angle). Results A high correlation was observed between the Clarke angle and radiography measurements (r &gt; 0.9; P &lt; 10−6). Excellent between- and within-day test-retest reliability for Clarke angle measurement (intraclass correlation coefficient, &gt;0.9) was observed. Results also suggest that pressure magnitude under the medial arch can be estimated using the Clarke angle and body mass (R2 = 0.95; error, &lt;0.04 N/cm2 [2%]). Conclusions This study suggests that the Clarke angle is a practical, reliable, and sensitive metric for quantification of medial arch height in children and could be recommended for research and clinical applications. It can also be used to estimate plantar pressure under the medial arch, which, in turn, may assist in the timely intervention and prognosis of prospective problems associated with flatfoot posture.

scholarly journals The effect of eight-week elastic walking exercise on the pattern of plantar pressure distribution in women with chronic low back pain during walking

2021 ◽  
Vol 42 (6) ◽  
pp. 713-721
Author(s):  
Farnaz Seify ◽  
Elahe Mamashli ◽  
AmirAli Jafarnejadgero ◽  
Mahrokh Dehghani ◽  
Mohsen Katanchi ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Distribution Pattern ◽  
Plantar Pressure ◽  
Reaction Force ◽  
Ground Reaction Forces ◽  
Low Back ◽  
Main Effect ◽  
Reaction Forces ◽  
Experimental Group

Background: Training of elastic walking is a new method for elasticity in gait and correction of the distribution pattern of plantar pressure in patients with low back pain during gait. This study aimed to investigate the distribution pattern of plantar pressure during gait in women with low back pain following 8 weeks-training of elastic walking. Methods: The present study was quasi-experimental. In this research, 20 women with low back pain were divided into control (n=11) and experimental (n=9) groups. Subjects from the experimental group performed elastic gait training for 3 sessions per week for 8 weeks while the control group didn’t have any exercise program. The plantar pressure variables included the peak of vertical ground reaction forces, the time to peak of ground reaction forces, loading rate, the peak of plantar pressure on the ten foot regions, the peak of ground reaction forces on the ten foot regions, and displacement of the pressure center in two internal-external (copx) and anterior-posterior (copy) lines. The distribution pattern of plantar pressure during gait was recorded by a foot scan system (Sampling rate 300 Hz) in pre-training and post-training. Two-way ANOVA was used to analyze the data. The significance level was set at P < 0.05. Results: In the experimental group, the results of this study demonstrated lower peak vertical reaction force (FzMS component) during post-test compared with pre-test (P = 0.002). Moreover, findings showed that the main effect of group on peak pressure in the mid-foot region was significant (P = 0.011). The results showed no significant difference concerning the main effect of group, the main effect of time and effect, interaction time and group on peak vertical reaction force, displacement of pressure center, vertical loading rate, and walking stance time (P > 0.05). Conclusion: The findings of this study showed that training of elastic walking does not have a significant effect on stance time. Also, training of elastic walking in the experimental group reduced the peak vertical ground reaction force (FzMS component) during the post-test compared with the pre-test that can correct the walking pattern and improve the chronic low back pain.

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