Online large tank floor plate corrosion defect monitoring system and method

Abstract

The invention provides an online large tank floor plate corrosion defect monitoring system and method. The detection system comprises an excitation device, a sensing device and a treatment device, wherein the excitation device is arranged at an exposed part of the edge of the tank floor plate or the outer wall of the tank; the sensing device adopts a distributed optical fiber sensing system or anacoustic emission sensor; when the sensing device adopts the distributed optical fiber sensing system, sensing optical fibers of the distributed optical fiber sensing system are arranged on the innerwalls of the tank floor plate; when the sensing device adopts the acoustic emission sensor, the acoustic emission sensor is suspended in the middle of the inner cavity of the tank by virtue of a hanger rope; the signal output part of the sensing device is connected with the treatment device. The system disclosed by the invention has the beneficial technical effects that the online large tank floorplate corrosion defect monitoring system and method are provided; the defects of the tank floor plate can be monitored on line by the technology, the monitoring operation is simple, the cost is low,and the detecting and positioning accuracy is high.

Description

technical field [0001] The invention relates to an on-line monitoring technology for corrosion defects on the bottom plate of a storage tank, in particular to an on-line monitoring system and method for corrosion defects on the bottom plate of a large storage tank. Background technique [0002] With the rapid development of my country's oil storage tanks and other related industrial technologies, the demand for plates required for structures such as tank floors and tank walls has also increased rapidly; however, metal plates such as iron plates and steel plates cannot be used during long-term production and use. Corrosion, shedding and other defects will inevitably occur, and in severe cases, oil storage will leak. [0003] The existing storage tank corrosion defect detection technologies mainly include manual observation method, eddy current detection method, magnetic flux leakage detection method, acoustic emission method, distributed optical fiber vibration measurement met...

AI Technical Summary

Problems solved by technology

[0007] The principle of the present invention is: the distributed optical fiber sensing system and the acoustic emission sensor are common sensing devices in the prior art; when the sensing device adopts the acoustic emission sensor, since the acoustic emission sensor is arranged inside the storage tank, it can be more Good reception of scattering information from the bottom plate of the storage tank; when the sensing device adopts a distributed optical fiber sensing system, the excitation device is actively applied to actively detect the bottom plate of the storage tank, which solves the problem of the existing distributed optical fiber vibration measurement method. The problem that it can only play a role in the case of leakage; in specific applications, the present invention can also be combined with the existing ultrasonic guided wave sensor array, and the present invention can detect the bottom plate of the storage tank, and the ultrasonic guided wave sensor array can detect the storage tank bottom plate. The parts other than the bottom plate of the tank are inspected, which enables us to conveniently monitor the overall structural health status of the storage tank online, detect hidden defects in time, and deal with them in time when there are hidden defects

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