A self-powered sensor for monitoring pipeline flow velocity based on vortex-induced vibration

Abstract

The invention discloses a self-powered sensor for monitoring flow rate of pipeline flow based on vortex-induced vibration. The self-powered sensor is characterized in that an inner cylinder is arranged at the inner wall of a pipeline of an outer cylinder, and leading line sealing plugs are arranged in the side wall of the pipeline of the outer cylinder; a bluff body, a sensor and an energy capturing unit are arranged in the inner cylinder; a vibration power generation sheet is clamped and fixed into the inner cylinder by a clamp assembly, and the end of the vibration power generation sheet isstuck onto an induced vibration board; mass blocks are vertically and symmetrically adhered to both sides of the induced vibration board; positive and negative leading lines of the vibration power generation sheet penetrate through the wall of the outer cylinder through the leading line sealing plugs, and are connected with an external circuit assembly. The self-powered sensor has the advantages that no external power source is needed, the online measuring on flow rate and the energy supply for a flow rate signal wireless transmission unit can be simultaneously realized under the action of fluid and solid coupling, and the online measuring on the flow rate in the pipeline is truly realized; by adjusting the self inherent frequency and the distance relative to the bluff body, the power supply capacity is increased, the structure is simple and miniature, the selection range of power generation functional materials is broad, the compatibility and extendability in the pipeline are strong,and the array layout and multi-point layout in the pipeline can be easily realized.

Description

technical field [0001] The invention belongs to the technical field of fluid state monitoring, and in particular relates to a self-powered sensor for monitoring pipeline flow velocity based on vortex-induced vibration. Background technique [0002] With the continuous consumption and depletion of coal resources, oil and natural gas have gradually become important energy and strategic reserve resources in my country at this stage. As the cornerstone of national energy supply and economic development, oil and gas and natural gas pipelines are facing many new challenges under the influence of the dual problems of prominent market supply and demand contradictions and declining production capacity year by year. The damage of oil and gas pipelines caused by natural corrosion, accidental damage and man-made damage is one of the most urgent major problems in oil and gas pipelines today. The leakage of the pipeline system not only caused huge energy and economic losses, polluted the...

AI Technical Summary

Problems solved by technology

The most proposed solution is to use the traditional turbine-type small power generation device. Its biggest problem is the complex structure, which leads to limited service life and is not conducive to miniaturization. At the same time, there are also problems such as electromagnetic interference. Its promotion and application have been restricted. very restrictive

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