Two-phase flow pattern sensor based on friction nano power generation principle

Abstract

The invention provides a two-phase flow pattern sensor based on a friction nano power generation principle. The sensor comprises a base, a top cover, a push rod and a circuit board, wherein the top cover is fixed at the upper part of the base, and a circuit cabin is formed between the base and the top cover; a metal sheet is arranged on the bottom surface of the top cover; the push rod penetratesthrough the base and can move vertically; the lower end of the push rod is connected with a struck board, and the upper end of the push rod extends into the circuit cabin and is connected with a friction board; the friction board is opposite to the bottom surface of the top cover, and a friction material layer is arranged on the upper surface of the friction board; the circuit board is connected with the metal sheet and the friction material layer; the struck board is used for receiving impact of bubble flow in gas-liquid two-phase flow, so that the friction board moves upwards to make contactwith the bottom surface of the top cover, the friction material layer and the metal sheet are subjected to triboelectrification to generate potential difference signals, and the circuit board monitors the potential difference signals and determines the pattern of the gas-liquid two-phase flow according to the potential difference signals. The sensor has the beneficial effects that based on the principle of a friction nano generator, the flow pattern is measured by measurement of electrical signals, and self-powering can be achieved.

Description

technical field [0001] The invention relates to the technical field of geological drilling and instrumentation equipment, in particular to a two-phase flow sensor based on the principle of friction nano power generation. Background technique [0002] With the continuous development of the world economy, energy has become an indispensable energy for economic development. As a new type of clean energy, coal-bed methane has changed from a toxic gas in the past to a hot resource today. Therefore, energy exploration and development must be accelerated. [0003] In the coalbed methane exploration and subsequent development stages, it is necessary to detect the gas-liquid two-phase flow generated by the upwelling of coalbed methane underground to formulate processes to avoid risks, etc. Therefore, two-phase flow detection is essential in exploration and production. Coalbed methane mining methods are generally underground gas extraction system mining and ground drilling mining. Grou...

AI Technical Summary

Problems solved by technology

[0005] At this stage, some of these sensors rely on optical means for measurement. In the case of underground mining, optical means and mechanical vision are not well realized, and sensors that use capacitance and conductivity methods for measurement require extremely high installation accuracy. For underground It is also difficult to realize the complex environment, so these methods cannot be applied in coalbed methane mining in general

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