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Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

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Design of a miniature sensing module for pressure mapping in functionality hydrogel using programmable

Zhuwen Xu¹, Yin Zhang¹, Zeyu Liu¹

¹School of Biomedical Engineering, Anhui Medical University, Hefei 230032, China.

|April 8, 2026

Summary

This study introduces a compact micro multi-channel system for functional hydrogels, enabling efficient tactile perception. The novel design minimizes crosstalk and enhances sensitivity for electronic skin applications.

Keywords:

Miniaturization Multi-channel acquisition system Programmable system-on-chip Square ring array

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Area of Science:

Materials Science
Sensor Technology
Biomedical Engineering

Background:

Flexible tactile sensors are crucial for mimicking human skin's tactile perception.
Key challenges include miniaturization, high sensitivity, and signal crosstalk suppression.

Purpose of the Study:

To develop a micro multi-channel pressure collection and monitoring system for functional hydrogels.
To address challenges in device miniaturization and signal integrity for tactile sensing.

Main Methods:

Integration of a sensor electrode array with a downsized multi-channel acquisition module.
Utilized an independent array design (4x4 structure, 1.8cm x 1.8cm) to reduce interference.
Employed alternating current excitation and a programmable system-on-chip (PSoC) for multi-pixel measurements.

Main Results:

Demonstrated a compact acquisition circuit (2.3cm x 3.0cm).
Successfully validated array characteristics and performed tactile measurements on letter patterns and vascular structures.
Achieved real-time tactile measurement with successful display of vascular structures.

Conclusions:

The proposed system effectively enables efficient pressure sensing and tactile perception using functional hydrogels.
The system's compact design and high performance show significant potential for human-machine interaction and electronic skin applications.