Method for locating magnetic leakage in magnetic medium
A positioning method and magnetic medium technology, applied in the direction of using electromagnetic means, instruments, measuring devices, etc., can solve the problems of high cost of camera-type positioning system, unsuitable for automatic detection, poor safety performance, etc., and achieve low cost and high reliability. Sexual, easy-to-use effects
Inactive Publication Date: 2010-07-21
NORTHEASTERN UNIV
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[0002] The development of microcomputer technology and the emergence of high-energy lithium batteries have led to the emergence of digital, intelligent, and high-performance pipeline crawlers that are required for efficient and high-quality detection of long-distance oil and gas pipelines. In pipeline crawler systems, positioning technology is a key Technology, the crawler travels in a closed oil and gas pipeline hundreds of meters or even thousands of meters long. It is difficult to find the position of the pipeline weld, and requires precise positioning, reliable operation, safety and practicality, and easy operation. From domestic The production and practical application of crawlers in the prior art show that the positioning systems mainly adopted by crawlers include: positioning systems such as mechanical type, ray type and camera type, but they all have defects and deficiencies: the mechanical positioning system is easy to operate , good safety performance, but poor reliability; the ray-type positioning system has good reliability and high positioning accuracy, but the safety performance is not good, and it is not suitable for the development needs of automatic detection; and the camera-type positioning system is generally expensive, so looking for a A positioning system with high positioning accuracy, high reliability, good safety performance, easy operation and low cost is not only a problem to be solved by domestic and foreign crawler manufacturers and relevant scientific research units, but also an urgent need for the actual inspection of oil and gas pipelines.
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[0037] The present invention is described in conjunction with embodiment and accompanying drawing.
[0038] The detection steps of the present invention are as follows:
[0039] Step 1. Put the climbing car 4 into the initial position of the pipe mouth, fix the receiver 2 on the climbing car, adjust the position to a height 10cm from the inner wall of the pipe, turn on the power of the climbing car 4, and power on the receiver 2. Place the transmitter 1 above the pipe and keep it perpendicular to the receiver 2, turn on the power of the transmitter 1, and adjust the radiation power of the transmitter 1 by observing the status of the indicator light of the receiver 2 until the two signals of the receiver 2 indicate The light is stable and fully bright, that is, the transmitter 1 and receiver 2 in the current state are fully matched. For example: the "stopping threshold" of receiver 2 = 70, when the magnetic flux leakage intensity after the output power passes through the pipel...
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The invention provides a method for locating the magnetic leakage in magnetic medium, belonging to the field of industrial welding technology. The detection method is supposed to follow a series of steps including: A. placing a creeper, a receiver and an emitter to the precalculated positions in the pipeline; B. moving the emitter above the receiver to obtain the emission values; C. finding the locating position; and D. measuring the distance between the creeper and the pipeline outlet and the distance between the emitter and the pipeline outlet. The invention has the advantages of precise positioning, high reliability, good safety, simple operation and low cost.
Description
technical field [0001] The invention belongs to the technical field of industrial welding nondestructive testing, and in particular relates to a method for locating magnetic medium flux leakage. Background technique [0002] The development of microcomputer technology and the emergence of high-energy lithium batteries have led to the emergence of digital, intelligent, and high-performance pipeline crawlers that are required for efficient and high-quality detection of long-distance oil and gas pipelines. In pipeline crawler systems, positioning technology is a key Technology, the crawler travels in a closed oil and gas pipeline hundreds of meters or even thousands of meters long. It is difficult to find the position of the pipeline weld, and requires precise positioning, reliable operation, safety and practicality, and easy operation. From domestic The production and practical application of crawlers in the prior art show that the positioning systems mainly adopted by crawler...
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Inventor 原培新赵秉军
Owner NORTHEASTERN UNIV