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本文介绍了储罐底板检测的重要性、漏磁检测原理、储罐底板的形式、储罐底板漏磁检测系统的特点,通过案例分析总结了此技术对储罐底板检维修的意义。 相似文献
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《仪表技术与传感器》2017,(11)
针对在储罐底板检测过程中,一些大型检测设备无法接触储罐边角、盘管下部等复杂区域的问题,研制了便携式多通道三维漏磁检测系统,该系统主要由检测装置、数据处理模块及上位机软件组成。检测装置磁化储罐底板并采集检测底板的漏磁信号,数据处理模块采用小型化处理电路,主要完成数据传输和人机交互等功能,上位机软件实现采集信号实时显示及缺陷信号分析处理等功能。开展检测试验并讨论三维漏磁信号产生机理,最终验证,使用该系统能快速有效地检出储罐底板一定深度范围内的腐蚀缺陷,具有良好的可靠性与重复性。 相似文献
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通过对比15台储罐的声发射检测和漏磁检测结果,确定声发射检测结果和漏磁检测结果有很好的一致性,验证了声发射检测技术对储罐底板腐蚀状态评价的可靠性。对储罐进行声发射检测,根据检测结果对严重等级高的储罐进行开罐检测,对科学保障储罐的安全运行具有重要意义。 相似文献
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概述了漏磁检测技术的原理,及其在常压储罐底板腐蚀缺陷检测中的应用。采用英国Silver-wing公司最新的Floormap VS2i储罐底板腐蚀扫描仪对华阳电业有限公司后石电厂3000 m3储油罐进行了现场检测,得到了储罐底板腐蚀缺陷的分布情况。 相似文献
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基于统计理论,引入风险概念,综合分析储罐底板腐蚀的声发射检测和漏磁检测数据,得到基于漏磁检测数据的声发射参量对储罐底板腐蚀的量化方法。通过对6台储罐的分析,得到某一地区介质为原油的一类储罐的声发射典型参量与储罐底板腐蚀的量化关系,即声发射活度与风险腐蚀速率CRP的关系为:y=13946.9758x,得到CRP与实际腐蚀速率CTP的关系为:Y=12.0412x。对评估储罐进行声发射检测,利用该评价模型可得到CRP,进而得到管理腐蚀速率CMP,为储罐管理维修决策提供依据。 相似文献
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《仪表技术与传感器》2020,(3)
为了在现有自主导航检测车上实现高精度定位,设计了一套基于UWB技术的储罐底板自动检测车定位系统。首先搭建了UWB定位基站实验平台,设计了相应的检测流程和定位算法,并通过直线定点测量实验进行了验证。在此基础上,通过反复实验实现了PID位置控制参数的优化。最终设定了一套往复扫描运动轨迹,开展自主检测运行实验。实验结果表明,检测车能够跟随设定目标轨迹运行,实际运行轨迹误差小于±4 cm,可以满足储罐底板漏磁全覆盖检测的需求。 相似文献
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基于振幅分布理论、统计理论,引入风险概念,综合分析储罐底板腐蚀的声发射检测和漏磁检测数据,得到基于漏磁检测数据的声发射参量对储罐底板腐蚀的量化方法。通过对10台样本储罐的分析,得到某一地区介质为原油的一类储罐的声发射典型参量对储罐底板腐蚀的量化关系,即声发射活度与风险腐蚀速率(CRP)的关系为Y=13514.65x,该模型的评价准确率为9022%。建立实际腐蚀速率(CTP)与CRP的关系模型,为Z=12.14x,得到CRP的12倍约为储罐底板腐蚀最严重部位的腐蚀速率的结论。这样对待评估储罐进行声发射检测,利用声发射量化评价模型,可得到CRP,进而得到管理腐蚀速率(CMP),参照API653-2009,可对储罐底板的剩余寿命进行预测。 相似文献
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基于风险的检验在大型常压储罐群的应用 总被引:1,自引:0,他引:1
根据API 581常压储罐基于风险的检验(RBI)技术原理,利用DNV的ASTRBI软件对20台大型常压储罐进行了风险评估,结果表明该储罐群没有高风险项,中高风险项、中风险项和低风险项的比例分别为:12.5%,67.5%和20%。针对各台储罐不同的风险等级,提出降低风险的措施,并制定了优化检验策略。最后有针对性地选取一台中高风险储罐和一台中风险储罐,通过对底板的漏磁检测,与评估结果进行对比分析,验证了储罐RBI技术的可靠性。 相似文献
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Song Xiao-chun Huang Song-ling Zhao Wei 《Russian Journal of Nondestructive Testing》2007,43(5):326-331
Magnetization is the key to inspection of a tank floor via the magnetic-flux-leakage (MFL) technique. In order to optimize
the magnetic circuit of the MFL detector and obtain the best detection effects, the influences of the magnet size on the floor
magnetization condition, the gap magnetic flux density, and the magnetic force were studied with the help of the finite element
method (FEM) and the effects of some other parameters, such as the magnet pole spacing and pole-piece thickness, on the signal-to-noise
ratio were analyzed. The simulation results indicate that variation of the magnet width affects the magnetization much more
than variation of the magnet thickness and that the detector can reach a trade-off between the magnetization effects and the
driving force when the magnet is about 30 mm thick and 40 mm wide. On condition that the floor has reached its magnetizing
saturation, an increase in the magnet-pole spacing and the pole-piece thickness can improve the testing sensitivity and the
signal-to-noise ratio.
The text was submitted by the authors in English. 相似文献
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常压储罐底板腐蚀特征参量的获取 总被引:1,自引:1,他引:0
常压储罐在长期使用过程中,会出现储罐底板的腐蚀问题,腐蚀缺陷往往表现为均匀腐蚀、区域性分布的局部腐蚀和随机分布的点腐蚀。针对腐蚀缺陷类型的多变性,研究提出了表征储罐底板腐蚀的特征参量,以及通过漏磁检测和概率分析计算获得这些腐蚀特征参量的方法,并在生产实际中进行了应用,为储罐检验和运行维护管理决策提供了有力支持。 相似文献
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Jin Tao Que Peiwen Chen Liang Li Liang 《Russian Journal of Nondestructive Testing》2005,41(4):231-238
Pipeline-safety evaluation is an important problem for industry. On the basis of the magnetic-flux-leakage (MFL) method, this paper presents an automated inspection device for inspection of pipeline defects, analyzes the MFL-inspection theory and some defect-feature parameters, and gives a recognizing algorithm based on a dynamic wavelet-basis-function (WBF) neural network. This dynamic network utilizes a multiscale and multiresolution orthogonal wavelet and backward-propagating through signals and has more significant advantages than BP or other neural networks used in MFL inspection. It also can control the accuracy of the predicted defect profiles, possessing high-speed convergence and good approaching features. The performance that applies the algorithm based on the network for predicting a defect profile from experimental MFL signals is also presented.__________Translated from Defektoskopiya, Vol. 41, No. 4, 2005, pp. 34–43.Original English Text Copyright © 2005 by Jin Tao, Que Peiwen, Chen Liang, Li Liang.The text was submitted by the authors in English. 相似文献
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The magnetic flux leakage (MFL) inspection has been widely used in the inline inspection for the evaluation of steel pipelines and plates. In this paper, a defect detection algorithm based on the MFL inspection is proposed for detecting defects near the welds. The defect in this paper means some deformations and deterioration of steel pipes because of corrosions and cracks by humidity and pressure after gas pipes were buried and it doesn’t mean bad welding. The MFL signal of the defects near the welds is worse than that of the far-away from the welds and has low signal-to-noise ratio (SNR). In this paper, the MFL signal of the defects near the welds is enhanced by using the Self Quotient Image (SQI) in this paper and the position of the defects is detected after applying the Discrete Cosine Transform (DCT). Experiments are conducted to demonstrate the accuracy of the proposed defect detection algorithm for the artificial defects carved on the pipes at the pipeline simulation facility (PSF) and the results show that the proposed algorithm can successfully detect the position of the defects on the pipes near the welds. 相似文献