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Storing tank bottom plate distributed wireless active and passive sound fusion detecting system

A storage tank bottom plate and detection system technology, which is applied in the direction of analyzing materials, processing detection response signals, and using sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc. It can solve the problems of small detection coverage, inability to obtain dimensions, and incomplete evaluation results, etc. , to achieve the effect of improving detection coverage, improving detection efficiency, and comprehensive, intuitive and reliable evaluation results

Active Publication Date: 2019-02-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since the ultrasonic guided wave system in the prior art can only detect the position of the existing corrosion defect on the tank bottom, but cannot obtain the size of the defect, and the acoustic emission system can only detect the corrosion activity of the tank bottom, when using the ultrasonic guided wave and acoustic emission system The problem of incomplete evaluation results may occur when the online detection of the tank bottom plate is carried out
[0007] In addition, because the ultrasonic guided wave technology needs to run the sensor along the edge plate of the tank bottom for a point-by-point detection, the ultrasonic guided wave technology has limitations such as low monitoring efficiency and small detection coverage due to sound wave attenuation

Method used

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  • Storing tank bottom plate distributed wireless active and passive sound fusion detecting system
  • Storing tank bottom plate distributed wireless active and passive sound fusion detecting system
  • Storing tank bottom plate distributed wireless active and passive sound fusion detecting system

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Experimental program
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Effect test

Embodiment 1

[0040] combine figure 1 As shown, the distributed wireless active and passive acoustic fusion detection system for the bottom plate of the storage tank includes an acoustic wave sensor 1, an acquisition card 2 and a host computer 3; among them, .

[0041] There are multiple acoustic wave sensors 1 in the present embodiment 1, and each acoustic wave sensor 1 is evenly arranged on the outer tank bottom edge plate 9 of the storage tank 8, as image 3 and Figure 4 shown. The acoustic wave sensor 1 has both the functions of receiving and emitting acoustic waves.

[0042] By arranging the above-mentioned acoustic wave sensor, active and passive acoustic wave detection can be performed on the defects of the tank bottom.

[0043] The acquisition card 2 is used for receiving the data of the acoustic wave sensor 1 , processing the data and wirelessly transmitting the data to the upper computer 3 .

[0044] The acquisition card 2 is integrated with an active acoustic excitation modu...

Embodiment 2

[0072] This embodiment 2 describes a distributed wireless active-passive acoustic fusion detection system for the bottom plate of a storage tank. Except for the following technical features that are different from the above-mentioned embodiment 1, other technical features of this embodiment 2 can refer to the above-mentioned embodiment 1.

[0073] Since the number of acoustic wave modes increases with the increase of frequency, using multiple narrow-band excitation signals as the excitation wave can suppress the multi-mode of the excited wave and reduce the complexity of monitoring. In Embodiment 2, the frequency range is 20kHz-500kHz, and the excitation wave in this range attenuates slowly, so this frequency band can be selected as the frequency range of the active acoustic excitation wave.

Embodiment 3

[0075] This embodiment 3 describes a distributed wireless active-passive acoustic fusion detection system for the bottom plate of a storage tank. Except for the following technical features that are different from the above-mentioned embodiment 1, other technical features of this embodiment 3 can be referred to above-mentioned embodiment 1.

[0076] Each acoustic wave sensor 1 has a built-in acquisition card 2, so that each acoustic wave sensor can be stimulated and received.

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Abstract

The invention discloses a storing tank bottom plate distributed wireless active and passive sound fusion detecting system. A plurality of sonic wave sensors are uniformly arranged at an edge plate ofthe tank bottom to excite active sound excitation waves; active sound excitation modulation signals and passive sound transmission signals are collected; and frequency domain and time domain information fusion analyzing processing can be completed, and therefore images of storing tank bottom plate defect distribution, size and corrosion active level (activity) are formed. The sensor point-by-pointdetection mode of a traditional ultrasonic guided wave technique is changed, the active sound excitation detection method with tank bottom fixed sensor array is adopted, the acoustic signal excitation mode and defect modulation signal extraction method are changed, the detection coverage is enlarged, and defect positions and sizes can be obtained. The passive sound emission detection method is combined to detect the active corrosion of the storing tank bottom plate, detecting efficiency is greatly improved, and the evaluating result is more comprehensive, intuitional and reliable. A wirelesscommunication module is adopted to transfer detecting data, and therefore remote monitoring is achieved.

Description

technical field [0001] The invention belongs to the technical field of storage tank detection, and relates to a distributed wireless active and passive acoustic fusion detection system for the bottom plate of a storage tank. Background technique [0002] Ultrasonic guided wave and acoustic emission are technologies that can realize on-line inspection of storage tank bottom plate without opening the tank and not stopping production. in: [0003] Ultrasonic guided wave is an active acoustic technology. The test system shows that the sensor is placed on the edge plate of the polished tank bottom. Under the control of the guided wave transceiver, the sensor actively sends a pulse signal to the tank bottom to excite Lamb waves. When the Lamb wave When a defect is encountered, an echo is formed, and the position of the defect can be calculated more accurately by analyzing the echo signal. In this way, the sensor is run along the edge plate of the tank bottom for a week, and poin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/46
CPCG01N29/04G01N29/46G01N2291/2695G01N2291/0289G01N2291/023G01N2291/106
Inventor 邱枫屈定荣李明骏黄贤滨许述剑单广斌
Owner CHINA PETROLEUM & CHEM CORP