Method and system for detecting pipeline defect based on ultrasonic guided wave focusing
A technology of ultrasonic guided wave and defect detection, which is applied in the field of ultrasonic measurement and pipeline system, and can solve the problems of inability to completely cover the entire pipe section and inconvenient detection.
Active Publication Date: 2013-12-04
PIPECHINA SOUTH CHINA CO
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] In actual projects, there are often a large number of pipe sections that are not convenient for internal inspection, and the excavation inspection cannot completely cover the entire pipe section. Therefore, there is an urgent need for a non-excavation pipeline pipe body inspection technology, so as to reduce the difficulty of pipeline inspection and reduce Pipeline inspection cost
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0046] Embodiment. The system composition of this example is as figure 2 As shown, it consists of an ultrasonic guided wave sensor, a receiving (pre-amplification) module, an excitation (power amplification) module, and a main processing unit. The output of the main processing unit is connected to the input of the excitation (power amplification) module, and the excitation (power amplification) module The output is connected to the ultrasonic guided wave sensor, the output of the ultrasonic guided wave sensor is connected to the input of the receiving (preamplification) module, the output of the receiving (preamplifying) module is connected to the input of the main processing unit, and the output of the main processing unit includes information input and data storage , waveform display, feature extraction, defect identification.
[0047] The electrical principle of the system in this example is as follows Figure 3-Figure 6 shown.
[0048] The main processing unit is a micr...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method and a system for detecting a pipeline defect based on ultrasonic guided wave focusing. The method comprises the following steps of: sending an ultrasonic guided wave excitation signal without time delay; performing amplitude modulation and amplification on the signal; receiving the ultrasonic guided wave excitation signal without the time delay; processing the signal; forming an ultrasonic guided wave curve without the time delay; calculating ultrasonic guided wave transmission time of an object characteristic to each channel; calculating the time delay of each channel; sending an ultrasonic guided wave excitation signal with the time delay according to time delay information; performing amplitude modulation and amplification on the signal; forming an ultrasonic guided wave curve with the time delay; obtaining a result; and repeating the process until a pipeline is withdrawn. The system consists of an ultrasonic guided wave sensor, a receiving module, an excitation module and a main processing unit, wherein the output of the main processing unit is connected with the input of the excitation module; the output of the excitation module is connected with the ultrasonic guided wave sensor; the output of the ultrasonic guided wave sensor is connected with the input of the receiving module; and the output of the receiving module is connected with the input of the main processing unit. The method and the system are quickly and conveniently operated and high in sensitivity, repeatability and reliability.
Description
technical field [0001] The invention relates to a defect detection method and system for buried long-distance pipelines based on ultrasonic guided wave focusing, and relates to the technical fields of ultrasonic measurement and pipeline systems. Background technique [0002] Pipeline defect detection is the guarantee for the safe operation of the pipeline, and it is an effective investment. So far, more than 60,000 kilometers of long-distance oil and gas pipelines have been built and put into operation in my country. As the service life of pipelines increases, the corrosion of these long-distance oil and gas pipelines from both internal and external environments is also increasing. Internal corrosion is mainly caused by the combined action of the conveying medium, liquid accumulation in the pipe, dirt and internal stress of the pipeline; external corrosion is usually caused by coating damage and failure. These will increase the unsafe factors of the pipeline. Especially t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F17D5/06G01N29/04G01N29/34
Inventor 王维斌冯展军陈健峰艾慕阳佟文强刘广文赵丑民王禹钦刘哲蒋先尧任重
Owner PIPECHINA SOUTH CHINA CO