Deformation on-line monitoring device of bottom plate of storage tank based on optical fiber grating

A technology for monitoring devices and storage tank floors, applied to measuring devices, optical devices, instruments, etc., can solve the problem of lack of on-line monitoring means for the bottom of crude oil storage tanks, the detection conclusion depends on human factors, time cost, huge manpower and material resources, etc. problem, to achieve the effect of reliable trend prediction, simple structure and low manufacturing cost

Inactive Publication Date: 2012-06-20
E TECH ENERGY TECH DEV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There is currently no effective online monitoring method for the bottom plate of crude oil storage tanks. Periodic tank cleaning is generally used at home and abroad, followed by non-destructive testing, which consumes a lot of time, manpower and material resources, and the detection conclusion depends on human factors. human error
In particular, the small changes caused by external forces to the tank bottom cannot be effectively monitored by conventional non-destructive testing techniques, and the failure process is often the accumulation of micro-strains that eventually lead to plastic deformation of the tank bottom

Method used

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  • Deformation on-line monitoring device of bottom plate of storage tank based on optical fiber grating
  • Deformation on-line monitoring device of bottom plate of storage tank based on optical fiber grating
  • Deformation on-line monitoring device of bottom plate of storage tank based on optical fiber grating

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Embodiment 1

[0027] An on-line monitoring device for deformation of the bottom plate of a storage tank based on a fiber grating, including a microprocessing computer 6, a spectrum demodulator 4, and a surface-mounted optical fiber refractive index sensor 2; the surface-mounted optical fiber refractive index sensor 2 is connected to the spectrum demodulator 4. The spectrum demodulator 4 is connected to the computer 6; the optical fiber refractive index sensor 2 is installed at the bottom of the storage tank 1 to sense the stress change under the prestress of the bottom of the storage tank.

[0028] The fiber optic refractive index sensor 2 has a blazed fiber grating 2.1, a single-mode fiber 2.2, and a fiber connector 2.4. The blazed fiber grating 2.1 is connected to the single-mode fiber 2.2, and the single-mode fiber 2.2 is connected to the fiber connector 2.4. The blazed fiber grating 2.1 penetrates into the sheet-like housing 2.3 , placed at the bottom of storage tank 1. The sheet shell ...

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Abstract

The invention relates to a deformation on-line monitoring device of a bottom plate of a storage tank based on an optical fiber grating, and belongs to the field of monitoring technologies of the storage tank. The deformation on-line monitoring device of the bottom plate of the storage tank based on the optical fiber grating is characterized in that the on-line monitoring device comprises a microprocessor, a spectral demodulating instrument and an optical fiber refractive index sensor, wherein the optical fiber refractive index sensor is connected with the spectral demodulating instrument; the spectral demodulating instrument is connected with the microprocessor; and the optical fiber refractive index sensor is mounted at the bottom of the storage tank to sense stress changes of the bottom of the storage tank under a prestressing force. The on-line monitoring device has the advantages of simple structure, steady performance, reliability in trend prediction, real-time detection, high data precision, and the like, is convenient to operate, and utilizes optical fibers as a sensing device.

Description

technical field [0001] The invention belongs to the technical field of storage tank monitoring, and in particular relates to an online monitoring device for deformation of a bottom plate of a storage tank based on an optical fiber grating. Background technique [0002] At present, crude oil storage tanks are important equipment for storing crude oil, and their safe operation is of great importance. Once an accident occurs, it will not only bring serious economic losses and personal casualties, but also bring adverse political, economic, and environmental impacts. There are many reasons for the failure of crude oil storage tanks, among which the damage to the bottom plate of the storage tank will directly lead to large-scale safety and environmental protection accidents such as crude oil leakage and storage tank destruction. From an electrochemical point of view, the bottom plate of a crude oil storage tank is prone to erosion due to the upper surface directly contacting crud...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16
Inventor 胡欣
Owner E TECH ENERGY TECH DEV CORP
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