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Related Experiment Video

Updated: Mar 19, 2026

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
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Flexible Piezoelectric Tactile Sensor Array for Dynamic Three-Axis Force Measurement.

Ping Yu1, Weiting Liu2, Chunxin Gu3

  • 1The State Key Laboratory of Fluid Power and Mechatronic Systems, Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China. yuping55@zju.edu.cn.

Sensors (Basel, Switzerland)
|June 9, 2016
PubMed
Summary
This summary is machine-generated.

A novel flexible tactile sensor array using polyvinylidene fluoride (PVDF) film accurately measures three-axis dynamic forces. This sensor array demonstrates high sensitivity and repeatability, suitable for robotic and prosthetic applications.

Keywords:
PVDFflexiblepiezoelectric tactile sensorthree–axis dynamic forcetruncated pyramid bump

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Area of Science:

  • Materials Science
  • Robotics
  • Sensor Technology

Background:

  • Developing advanced tactile sensors is crucial for enhancing robotic manipulation and human-machine interaction.
  • Existing sensors often lack the flexibility and multi-axis force sensing capabilities required for complex applications.

Purpose of the Study:

  • To propose and characterize a new flexible piezoelectric tactile sensor array for measuring three-axis dynamic contact force distribution.
  • To evaluate the sensor array's performance in terms of sensitivity, linearity, repeatability, and frequency response.

Main Methods:

  • Fabrication of a 3x2 tactile sensor array using polyvinylidene fluoride (PVDF) film sandwiched between multiple electrodes.
  • Utilizing a truncated pyramid bump for improved force transmission to four piezoelectric capacitors per unit.
  • Conducting dynamic tests with sinusoidal forces along x, y, and z axes to measure charge changes and calculate force components.

Main Results:

  • The tactile units exhibited good sensitivities (14.93 pC/N for x-axis, 14.92 pC/N for y-axis, 6.62 pC/N for z-axis).
  • The sensor array demonstrated good linearity, low coupling, high repeatability, and frequency response from 5-400 Hz.
  • Dynamic three-axis force measurements showed an average error of 10.68% ± 6.84%.

Conclusions:

  • The proposed PVDF-based tactile sensor array is effective for measuring three-axis dynamic forces.
  • Its flexibility and performance characteristics make it suitable for integration into robotic hands and prosthetic devices.
  • This sensor technology offers a promising solution for advanced tactile sensing in various applications.