Pneumatic finger sensor based on stereoscopic s-microstructured po f

By using a polymer fiber optic pneumatic finger sensor based on a three-dimensional S-microstructure, the problem of simultaneous sliding recognition and curvature detection during dynamic contact or sliding was solved. This enabled the synchronous and independent measurement of sliding and bending signals, improving the sensor's real-time performance and accuracy.

CN121928618BActive Publication Date: 2026-07-07TIANJIN POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN POLYTECHNIC UNIV
Filing Date
2026-03-30
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing sensors struggle to simultaneously achieve sliding recognition and curvature detection during dynamic contact or sliding processes, and traditional sensor systems are highly complex, computationally intensive, and have poor real-time performance.

Method used

A pneumatic finger sensor based on polymer optical fiber (POF) with a three-dimensional S-microstructure is adopted. By setting parallel double three-dimensional S-microstructure optical fiber bodies in the elastic body, the asymmetry of the micro-fiber is used to respond to sliding shear forces in different directions to achieve sliding sensing. The transmission of sliding force is isolated by an isolation cavity, so as to realize the synchronous and independent measurement of bending signal and sliding signal.

Benefits of technology

It has realized its great application potential in flexible grippers, improved operational controllability and environmental adaptability, reduced system complexity and data processing burden, and improved measurement real-time performance and accuracy.

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Abstract

This invention belongs to the field of sensor technology, and specifically relates to a pneumatic finger sensor based on a three-dimensional S-shaped microstructure POF. The pneumatic finger sensor includes an optical fiber body formed by fused taper molding. Along the length of the optical fiber body, the optical fiber body includes an input optical fiber, a first tapered region, a microfiber, a second tapered region, and an output optical fiber connected sequentially. The first tapered region is coaxially arranged with the input optical fiber, and the second tapered region is coaxially arranged with the output optical fiber. The small-diameter ends of the first and second tapered regions are connected by the microfiber. The input and output optical fibers are arranged parallel to each other, and the microfiber is S-shaped. This invention provides a pneumatic finger sensor based on a three-dimensional S-shaped microstructure POF, which exhibits sensitive and stable response characteristics to bending deformation, effectively monitoring force, bending state, and sliding direction. It has good application potential in closed-loop control and adaptive operation of flexible grippers.
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