Density sensing device and method based on friction nanometer generator

Abstract

The invention discloses a density sensing device and method based on a friction nanometer generator. The density of a liquid to be measured is reflected according to the volume of an upper floater and a lower floater immersed in the liquid to be measured after the upper floater and the lower floater reach a static state. The upper floater moves relative to a floating platform which always floats on the liquid level of the liquid to be measured under the action of gravity, buoyancy and viscous resistance, and due to the coupling action of the triboelectrification effect and electrostatic induction, a solid friction medium connected with the upper floater and a second electrode layer connected with the floating platform generate a friction electric signal due to relative displacement, and calculation is performed to obtain a measured value of the density of the liquid to be measured. The device has the advantages of being simple in structure, low in cost, safe, environmentally friendly, free of external power supply for energy supply and the like, and has important application prospects in the fields of aquaculture, energy transportation, food detection, medical care, environment monitoring and the like.

Description

technical field [0001] The invention belongs to the technical field of measuring fluid thermophysical properties, and in particular relates to a density sensing device and a method thereof based on a frictional nanogenerator. Background technique [0002] Density is one of the most common thermophysical properties in production and life. It is widely used in industrial production, energy development, food testing and medical care. The measurement of density is very important for identifying the components of mixtures, determining the state of substances, and monitoring environmental parameters. plays an important role. As a simple testing instrument that can measure density accurately, quickly and efficiently, a density meter plays an indispensable role in engineering applications and real life. Among them, the float type density meter is made by using Archimedes' law and the condition that the float maintains balance on the liquid surface to be measured. The liquid density...

AI Technical Summary

Problems solved by technology

There is mechanical movement in the working process of the float density meter. The friction nanogenerator is used to detect the displacement of the density meter, and the displacement signal is converted into an electrical signal. question

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