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Electromagnetic Field Analysis for Outer Orientation Problems in In-line pipeline inspection

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Electromagnetic Field Analysis for Outer Orientation Problem...

2010 Chinese Control and Decision Conference

作者： Yun Xu~(1,2),Bo Dai~(2**),Zurong Xie~2,Xiaoping Tian~2 1.Beijing University of Chemical Technology,Beijing,100029,China 2.Beijing Institute of Petro-chemical Technology,Beijing,102617,China

＜正＞In-line pipeline inspection is one of the most important ways to inspect pipeline *** is necessary to locate the corrosion from the ground after the detection is *** four-step comprehensive method,which contains course wheel orientation, welding lines modification,outer orientation modification and revolving angle orientation,is proposed in this *** the same time, outer orientation modification usually use the way of low-frequency electromagnetic wave to modify the course wheel’s count,for improving the *** article establishes the outer orientation model,deduces the formula of the magnetic strength in the pipeline,and uses ANSYS software to simulate the *** simulation not only accords with the experiment,but also shows that different parameters would affect the magnetic strength in the *** is significant to understand the outer orientation technology with low-frequency electromagnetic waves.

关键词： pipeline inspection Outer orientation ANSYS Magnetic strength

A pipeline inspection Micro Robot Based on Screw Motion Wheels

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Advances in Manufacturing 2000年第3期4卷 235-238页

作者： Jin-wu Qian Ya-nan Zhang Lin-zhi Sun Xin-jie Qin Yao-zong Shen School of Electromechanical Engineering and Automation Shanghai University Shanghai China

The micro robot based on screw motion wheels, which features high payload/mass ratio, fast and continuous motion, adaptation to pipe diameter or roundness variations, is suitable for locomotion and inspection inside small diameter pipelines. The robot inspection system, Tubot I, developed at Shanghai University is composed of locomotion mechanism with an inner motor, a micro CCD camera and a monitor outside the pipeline. In the paper, the kinematics and statics analyses are presented for the screw locomotion system of Tubot I. The moving characteristics are obtained from experiments on the robot prototype.

关键词： micro robot pipe crawler screw motion wheel pipeline inspection

Coefficients de-noising with wavelet transform for magnetic flux leakage data obtained from oil pipeline

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High Technology Letters 2005年第4期11卷 406-409页

作者：韩文花 Que Peiwen Institute of Automatic Detection Shanghai Jiaotong University Shanghai 200030 P.R. China

This paper considers the problem of noise cancellation for the magnetic flux leakage (MFL) data obtained from the inspection of oil pipelines. MFL data is contaminated by various sources of noise, and the noise can considerably reduce the detectability of flaw signals in MFL data. This paper presents a new de-noising approach for removing the system noise contained in the MFL data by using the coefficients de-noising with wavelet transform. Experimental results are presented to demonstrate the advantages of this de-noising approach over the conventional wavelet de-noising method.

关键词： magnetic flux leakage coefficients de-noising wavelet transform pipeline inspection system noise flaw signals

Research on Magnetic Flux Leakage Detection Method for Subsea pipeline

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Journal of Donghua University(English Edition) 2004年第5期21卷 98-101页

作者：黄作英阙沛文杨崇倡 College of Electronics and Information Shanghai Jiaotong University Shanghai 200030 ChinaDr College of Electronics and Information Shanghai Jiaotong University Shanghai 200030 China College of mechanical Donghua University Shanghai 200051 China

The intelligent pig based on the (MFL) is frequently used for in-line inspection of transportation pipelines. The article discusses the key technology of an MFL tool that includes the sensors structure, the constitu... 详细信息

关键词： magnetic flux leakage pipeline inspection signal process

Wavelet domain adaptive filtering algorithm for removing the seamless pipe noise contained in the magnetic flux leakage data

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High Technology Letters 2006年第2期12卷 170-174页

作者：韩文花 Que Peiwen Institute of Automatic Detection Shanghai Jiaotong University Shanghai 200030 P.R. China

With the widespread application and fast development of gas and oil pipeline network in China, the pipeline inspection technology has been used more extensively. The magnetic flux leakage （MFL） method has established itself as the most widely used in-line inspection technique for the evaluation of gas and oil pipelines. The MFL data obtained from seamless pipeline inspection is usually contaminated by the seamless pipe noise （SPN）. SPN can in some cases completely mask MFL signals from certain type of defects, and therefore considerably reduces the detectability of the defect signals. In this paper, a new de-noising algorithm called wavelet domain adaptive filtering is proposed for removing the SPN contained in the MFL data. The new algorithm results from combining the wavelet transform with the adaptive filtering technique. Results from application of the proposed algorithm to the MFL data from field tests show that the proposed algorithm has good performance and considerably improves the detectability of the defect signals in the MFL data.

关键词： pipeline inspection magnetic flux leakage data discrete wavelet transform wavelet domain adaptive filtering seamless pipe noise

An Ultrasonic In-line inspection System on Crude Oil pipelines

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An Ultrasonic In-line Inspection System on Crude Oil Pipelin...

第二十六届中国控制会议

作者： Dai Bo,Zhang Huiping,Sheng Sha,Dong Jinxi,Xie Zurong,Tang Dongliang Beijing Institute of Petro-chemical Technology,Beijing 102617,P.R.China

The ultrasonic in-line inspection is one of the important ways to inspect the wall-loss defects on-line for crude oil *** an integrative device,ultrasonic in-line inspection system contains complex mechanism,electronic instruments and a computer to achieve ultrasonic inspection,orientation,guarantee technology,signal processing,data management and project *** ultrasonic in-line inspection system with 20 ultrasonic channels is developed to meet this *** multi-channels ultrasonic inspection system consists of main and *** system locates the corrosion by course wheel orientation,welding line modification,outer orientation modification and revolving angle *** under the water show that it can inspect and display the shape,size and location of the corrosion of the pipeline and the data acquisition,management,storage and image display can satisfy the inspection of long-distance pipelines in practice.

关键词： Ultrasonic pipeline inspection Orientation Data Acquisition

A NEW TYPE OF WHEELED INTELLIGENT ULTRASONIC THICKNESS MEASUREMENT SYSTEM

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A NEW TYPE OF WHEELED INTELLIGENT ULTRASONIC THICKNESS MEASU...

2013全国压电和声波理论及器件技术研讨会

作者： Jin-sheng YANG Xiao-guang ZHAO Yong-jiang ZHANG Zhe CAO China Petroleum pipeline inspection Technologies Co. Ltd. National Engineering Laboratory of Oil & Gas pipeline Transportation & Safety China Petroleum Pipeline Inspection Technologies Co.Ltd. China Petroleum pipeline Research Institute

In the field of industrial ultrasonic testing,ultrasonic thickness measurement（UTM）is a method of performing non-destructive measurement of the local thickness of a solid element basing on the time taken by the ultrasound wave to return to the surface and it is now regularly utilized in all areas of industrial measurements for its advantage of high penetrating power,high sensitivity and greater accuracy than other non-destructive methods in determining the depth of internal flaws and the thickness of parts with parallel *** are needed to provide effective transfer of ultrasonic wave energy between transducers and parts being *** to the working characteristic of gas pipe,a wheeled ultrasonic thickness measurement system is developed and a kind of special elastic material is used to realize ultrasonic acoustic *** system consists of wheeled thickness measurement probe,pulser and receiver unit,data analysis and storage unit and the interface *** thickness measurement probe is composed of thickness measurement wheel,auxiliary support wheel,slip ring,carbon brush device,proximity switch and other major *** design of thickness measurement wheel uses conventional piezoelectric ultrasonic probe which is installed on the wheel *** wheel hub is casted by special elastic material which can realize ultrasonic acoustic coupling through the tight fitting between the wheel surface and the detected *** auxiliary support wheel casted by polyurethane material is embedded with the metal *** metal block works together with proximity switch to excite the generation of ultrasonic *** paper introduces the working principle and design method of the system.

关键词： Ultrasonic thickness measurement Wheeled probe pipeline inspection