A piezoelectric based sensor system designed for in vivo skin biomechanical measurements

Chen, Yisha; Lemaire‐Semail, Betty; Giraud, Frédéric; Hayward, Vincent

doi:10.1016/j.sna.2023.114168

Cited by 2 publications

(2 citation statements)

References 29 publications

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“…In the future, to improve the dependability of the FSRs, modelling the piezoelectric bender's hysteresis using the Bouc-Wen model is highly suggested. Nonetheless, major causes of hysteresis are often caused by instantaneous displacement rather than small voltage fluctuation [22]- [23]. In conclusion, from the study, there is no solid guarantee that the selected sensors were dependable for an accurate measurement of a palm gripping force, but it is a great choice to measure a small magnitude of force per surface area within a controlled condition [16].…”

Section: Different Shapes Evaluationmentioning

confidence: 88%

Palm Gripper Measurement Device for Post-Stroke Rehabilitation Progressive Tracking

Che Zakaria

2024

JMechE

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Various devices are used in the medical world to measure grip force. However, there is no well-defined method being used to quantify the distribution of grip forces applied by post-stroke patients. It is important to track the patient's progress in neurofeedback training throughout rehabilitation with quantitative evaluation. A palm gripper measurement device is being developed, equipped with Force Sensing Resistors (FSRs) (RP-S40-ST model) to capture grip force. The device provides valuable insights into rehabilitation progress by assessing the grip force. The analogue value from FSRs is linearly interpolated from the input range to the output range using the map function; 'map(avg_force, 0, 1023, 0, 15)' to scale the 'fsrReading' from the input range of 0 to 1023. The input range is converted into a score 0 to 15 scale of a bar graph to indicate the amount of force measured. The accuracy showed by Pearson’s r shows a correlation trend between the analogue value and length of the bar graph with 0.97651 and 0.98083, respectively. A matrix was plotted for three subjects with different object sizes for device testing which shows the adjusted R2 is 0.955 highest for big objects and the lowest adjusted R2 is 0.63672 for small objects.

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Section: Different Shapes Evaluationmentioning

confidence: 88%

Palm Gripper Measurement Device for Post-Stroke Rehabilitation Progressive Tracking

Che Zakaria

2024

JMechE

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“…Piezoelectric bulk acoustic wave devices are widely used in gas-phase and liquidphase sensing due to their high accuracy, stability, and consistency [1][2][3][4][5][6][7][8]. Conventional piezoelectric bulk acoustic wave devices rely on a thickness-field-excitation (TFE) mode, in which electrodes are plated on the top and bottom surfaces of a crystal plate, and the resulting effective electric field is in the direction of the thickness of the crystal plate [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Energy-Trapping Characteristics of Lateral Field Excited GdCOB Crystal Bulk Acoustic Wave Devices Based on Stepped Electrodes

Wu,

Kang,

et al. 2023

Micromachines

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In this work, high-frequency forced vibrations of lateral field excitation (LFE) devices with stepped electrodes based on monoclinic crystals GdCOB are modeled, and the influence laws of the device parameters (the step number, size, and thickness of the stepped electrodes) on the energy-trapping effects of the device are revealed. The results show that the step number has a significant effect on the energy-trapping effect of the device: with the increase in the step number, the stronger energy-trapping effect of the device can be obtained; with the increase in the thickness difference of two layers of electrodes, the energy-trapping effect of the device becomes stronger; with the increase in the difference of the electrode radius, the energy-trapping effect of the device is enhanced gradually. The results of this work can provide an important theoretical basis for the design of stepped-electrode LFE resonators and sensors with high-quality factors based on monoclinic crystals.

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A piezoelectric based sensor system designed for in vivo skin biomechanical measurements

Cited by 2 publications

References 29 publications

Palm Gripper Measurement Device for Post-Stroke Rehabilitation Progressive Tracking

Palm Gripper Measurement Device for Post-Stroke Rehabilitation Progressive Tracking

Energy-Trapping Characteristics of Lateral Field Excited GdCOB Crystal Bulk Acoustic Wave Devices Based on Stepped Electrodes

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