A frictional nanogenerator and self-powered flow sensing system

By designing a triboelectric nanogenerator and a self-powered flow sensing system, the problems of low output power of triboelectric nanogenerators and measurement errors of electromagnetic flow sensors were solved, realizing efficient flow monitoring of non-conductive media and viscous liquids, and providing stable electrical signal feedback and self-powered function.

CN115290151BActive Publication Date: 2026-06-26ZHEJIANG NORMAL UNIV
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Patent Information

Application Number
CN202210047474.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-01-17
Publication Date
2026-06-26
Estimated Expiration
2042-01-17

AI Technical Summary

Technical Problem

Existing triboelectric nanogenerators have low output power, making it difficult to drive high-power devices, and electromagnetic flow sensors cannot measure the flow rate of non-conductive media and liquids with dirt, resulting in measurement errors.

Method used

A triboelectric nanogenerator was designed, employing double-sided friction, a multi-layer structure, and parallel output. Combined with a self-powered flow sensing system, including an impeller, an aluminum shaft, a top cover, an FEP fin, and a nylon membrane, the impeller is rotated by liquid flow to achieve efficient power generation and drive an LED signal light to provide flow feedback.

Benefits of technology

It improves the output power density per unit volume, enables the measurement of flow rates of non-conductive media and viscous liquids, provides stable electrical signal feedback, realizes self-powered flow monitoring, and avoids measurement errors.

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Abstract

The application relates to a friction nanometer power generation device and a self-powered flow sensing system. The device comprises a top cover, a multilayered shell, a base, an FEP tab, a copper patch electrode, a nylon film, an aluminum shaft and an impeller; the top cover is connected with the aluminum shaft through a nut at the top; the FEP tab is fixed in the vertical strip structure of the top cover; the aluminum shaft passes through the center of the impeller; the bearing is fixed on the base; the bearing guides the aluminum shaft; the copper patch electrode and the nylon film are attached to each layer of the shell; the nylon film rubs against the FEP tab; the multilayered shell is fixed in the groove of the base; the impeller drives the aluminum shaft to rotate; the aluminum shaft drives the top cover to rotate; the top cover drives the FEP tab to rotate and then rubs against the nylon film. The application can improve the output power density per unit volume, the capacitor can store more energy per unit time, the LED signal lamp can be ensured to operate for a long time, the flow level can be fed back, and the instantaneous flow size can be accurately obtained through the processing of an electrometer, a transmitter, a DAQ acquisition card and a Labview module.
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