Piezoelectric Tactile Sensing

Sensing contact and vibration using the piezoelectric effect, where a material generates an electric charge when it is deformed by force.

Piezoelectric tactile sensing relies on the piezoelectric effect: materials such as quartz, lead zirconate titanate (PZT) ceramic, or polyvinylidene fluoride (PVDF) film generate a surface charge when deformed by force, and reading out that electrical signal senses changes in force. It responds quickly and has a wide frequency bandwidth, making it very sensitive to the high-frequency vibration produced by sliding, impact, or rubbing against a textured surface; however, the charge gradually leaks away, so it cannot measure a constant static pressure, and is therefore often paired with a piezoresistive or capacitive sensing element. It is one of the main tactile-sensing principles, alongside piezoresistive, capacitive, magnetic, and optical sensing. Recently, several robotics projects have repurposed piezoelectric microphones as tactile sensors — for example, A-SLIP (2026) places several piezoelectric microphones behind a gripper’s silicone pad and uses a neural network to estimate whether an object is slipping, and in which direction and by how much.

ExampleA-SLIP mounts 4 piezoelectric microphones behind the textured silicone pad of a parallel gripper; the vibration from an object beginning to slip is detected, and the controller immediately increases the grip force.

Also called

Piezoelectric Sensor, Piezoelectric Tactile Sensor, PVDF Tactile Sensing

Related

Tactile Sensor · Piezoresistive Tactile Sensing · Capacitive Tactile Sensing · Slip Detection · Contact Microphone · Electronic Skin

Sources

Piezoelectric sensor - Wikipedia
Tactile Robotics: An Outlook (arXiv 2508.11261)
A-SLIP: Acoustic Sensing for Continuous In-hand Slip Estimation (arXiv 2604.08528)

As of

2026-04