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Self-powered wireless sensing device

A wireless sensing and self-powered technology, applied in the field of wireless sensing, can solve the problems of short effective transmission distance, propagation direction constraints, large device size, etc., and achieve the effect of significant electromagnetic wave signal, high sensitivity and low cost

Pending Publication Date: 2022-02-01
THE CHINESE UNIVERSITY OF HONG KONG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a self-powered wireless sensor device to solve the problems of high energy consumption, short effective transmission distance, large device size and restricted propagation direction of traditional wireless sensor modules.

Method used

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Embodiment Construction

[0051] Embodiments of the present invention will be described in detail below. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0052] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be used for fixation as well as for coupling or communication.

[0053] It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in ...

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Abstract

A self-powered wireless sensing device uses a friction antenna, wherein the friction antenna comprises a metal electrode layer and two layers of films for triboelectrification, the metal electrode layer is placed between the two layers of films to form a sandwich structure, the metal electrode layer comprises a first metal structure and a second metal structure which are separated from each other, the first metal structure and the second metal structure are provided with tips which are arranged in a mirror symmetry mode, and a minimum gap is formed at the tips. When the friction antenna is excited by external mechanical motion, negative charges generated by triboelectrification are accumulated on the thin film, an electric field is formed between the first metal structure and the second metal structure based on electrostatic induction, the electric field intensity reaches the maximum at the tip gap, once the electric field intensity reaches a breakdown threshold voltage, discharge caused by breakdown is generated at the gap, electromagnetic wave emission is generated while breakdown discharge is performed, and mechanical motion is converted into electromagnetic wave signals which have high sensitivity and are distributed at very high frequency.

Description

technical field [0001] The invention relates to wireless sensing, in particular to a self-powered wireless sensing device. Background technique [0002] With the development of modern society, smart cities based on Internet of Things (IoT) technology are expected to serve as a new way of life in the near future. The Internet of Things has the characteristics of intelligence, convenience and high security, so it is widely used in fields such as healthcare, transportation, building automation and industry. Sensors are called the eyes and ears of the Internet of Things. They can usually convert physical signals to be sensed into electrical signals and are one of the most important components of the Internet of Things. At present, widely distributed sensors still need battery or wire-based power supply, and a large number of sensors also need transmission lines to transmit sensing signals, which undoubtedly brings great challenges to the application of the Internet of Things. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/20
CPCH02J50/20
Inventor 訾云龙王昊宇王佳琪
Owner THE CHINESE UNIVERSITY OF HONG KONG
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