Self-powered solid-state non-contact collision avoidance sensor based on liquid tvng

By introducing a self-powered solid-state non-contact collision avoidance sensor based on liquid TVNG into underground coal mine equipment, and utilizing the triboelectric effect to generate an electrical signal, the reliability problem of equipment condition monitoring and collision avoidance functions is solved, achieving high-sensitivity monitoring and collision avoidance effects. It is suitable for health status monitoring of underground coal mine equipment and close-range precise collision avoidance of robotic arms.

CN121877235BActive Publication Date: 2026-05-29TAIYUAN UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TAIYUAN UNIVERSITY OF TECHNOLOGY
Filing Date
2026-03-20
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing technologies, the reliability of equipment status monitoring and collision avoidance functions of underground coal mine robots is insufficient in high humidity, high temperature and high dust environments, making it difficult to achieve long-term and stable non-contact monitoring of minute gaps. In addition, traditional contact limit switches have problems of mechanical wear and complicated wiring.

Method used

A self-powered solid-state non-contact collision avoidance sensor based on liquid TVNG is adopted. By introducing an interfacial liquid between the semiconductor layer and the metal moving electrode, an electrical signal is generated using the triboelectric effect to realize equipment status monitoring and collision avoidance functions. The sensor does not require external power supply or wiring.

Benefits of technology

It achieves high-sensitivity, millimeter-level rapid sensing and feedback, adapting to long-term unattended maintenance applications underground. It is suitable for health status monitoring of coal mine equipment and close-range precise collision avoidance of robotic arms, overcoming the mechanical wear and cumbersome wiring problems of traditional methods.

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Abstract

The application relates to the technical field of semiconductor devices, in particular to a self-powered solid non-contact avoidance sensor based on a liquid TVNG, which solves the technical problems of serious mechanical wear, complicated wiring and non-contact monitoring insensitivity of a fine gap of a contact type limit switch or a pressure-sensitive film installed at the front end of a mechanical arm, and comprises a gold electrode layer, a semiconductor layer and a metal moving electrode, the gold electrode layer is plated on the bottom surface of the semiconductor layer, the top surface of the semiconductor layer is fixedly connected with a hemispherical flexible packaging cover body, the metal moving electrode is fixedly connected to the inner top of the flexible packaging cover body, a certain gap is kept between the metal moving electrode and the top surface of the semiconductor layer, and interface liquid is filled in the gap. The sensor adds the interface liquid with a thickness of mm between the metal moving electrode and the semiconductor layer, an instantaneous signal is generated when the interface liquid slides relative to the semiconductor layer, and mm-level rapid sensing feedback with high sensitivity is successfully realized.
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