FlexiTac: A Low-Cost, Open-Source, Scalable Tactile Sensing Solution for Robotic Systems

Forum topic · 小凯 · 2026-05-04

Summary

FlexiTac is a low-cost, open-source, and scalable piezoresistive tactile sensing solution for robotic end-effectors, developed by Binghao Huang and Yunzhu Li (arXiv:2604.28156). The system is a practical plug-and-play module combining thin, flexible tactile sensor pads that deliver dense tactile signals with a compact multi-channel readout board for real-time control and large-scale data collection. The sensor pads use a sealed three-layer laminate stack (FPC-Velostat-FPC) with electrode patterns directly integrated into flexible printed circuits, improving manufacturing throughput and repeatability while retaining mechanical compliance suitable for both rigid and soft grippers. The readout electronics rely on widely available, low-cost components and stream tactile signals to a host at 100 Hz over serial communication. FlexiTac can be mounted on different platforms across multiple configurations without major mechanical redesign. The authors demonstrate compatibility with modern tactile learning pipelines, including 3D visuo-tactile fusion for contact-aware decision-making, cross-embodiment skill transfer, and real-to-sim-to-real fine-tuning using GPU-parallel tactile simulation.

Overview

Research area: Robotics Authors: Binghao Huang, Yunzhu Li Published: 2026-04-30 arXiv: 2604.28156

Abstract

We present FlexiTac, a low-cost, open-source, and scalable piezoresistive tactile sensing solution designed for robotic end-effectors. FlexiTac is a practical plug-in module consisting of (i) thin, flexible tactile sensor pads that provide dense tactile signals and (ii) a compact multi-channel readout board that streams synchronized measurements for real-time control and large-scale data collection.

FlexiTac pads adopt a sealed three-layer laminate stack (FPC-Velostat-FPC) with electrode patterns directly integrated into the flexible printed circuits, significantly improving manufacturing throughput and repeatability while preserving the mechanical compliance needed for deployment on both rigid grippers and soft grippers.

The readout electronics use widely available, low-cost components and stream tactile signals to a host computer at 100 Hz over serial communication. Across multiple configurations, FlexiTac can be mounted on different platforms without major mechanical redesign.

The authors show that FlexiTac supports modern tactile learning pipelines, including:

3D visuo-tactile fusion for contact-aware decision-making
Cross-embodiment skill transfer across different robot platforms
Real-to-sim-to-real fine-tuning leveraging GPU-parallel tactile simulation

Key highlights

Low-cost, open-source piezoresistive tactile sensing
Plug-and-play design: flexible sensor pad + multi-channel readout board
Sealed three-layer laminate (FPC-Velostat-FPC) with integrated electrodes
100 Hz tactile streaming via serial communication
Compatible with rigid and soft grippers; no major redesign needed across platforms
Supports 3D visuo-tactile fusion, cross-embodiment transfer, and real-sim-real fine-tuning

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