Mileage measuring device and method of in-pipeline detector

An internal detector and pipeline technology, applied in pipeline systems, mechanical equipment, gas/liquid distribution and storage, etc., can solve the problem of lack of systematic and high-precision detection devices

Active Publication Date: 2014-09-17
NORTHEASTERN UNIV
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  • Application Information

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Problems solved by technology

[0003] At present, the mileage measurement of pipelines has good real-time detectio

Method used

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  • Mileage measuring device and method of in-pipeline detector
  • Mileage measuring device and method of in-pipeline detector
  • Mileage measuring device and method of in-pipeline detector

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Embodiment Construction

[0053] An embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0054] The in-line detector mileage measurement device in this embodiment is installed on the in-line detector, such as figure 1 As shown, including: magnetic field sensor unit, signal conditioning module, A / D conversion module and central processing unit;

[0055] The magnetic field sensor unit in the present embodiment comprises 3 magnetic field sensors, what described magnetic field sensor all adopts is the Hall sensor of model A44E, each A44E Hall sensor faces the mileage wheel, along with the movement of each mileage wheel, Capture the magnetic field changes of each mileage wheel and output pulse electrical signals to the signal conditioning module;

[0056] The A44E Hall sensor of this embodiment is installed at the end of the detector in the pipe and connected to the mileage wheel through a tension spring. This structure is simpler and more r...

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Abstract

The invention discloses a mileage measuring device and method of an in-pipeline detector, and belongs to technical field of pipeline detection. The mileage measuring device is arranged on the in-pipeline detector, and comprises a magnetic field sensor unit, a signal conditioning module, an A/D (analog-to-digital) conversion module and a central processing unit. The method comprises the steps: step 1: acquiring pulse electrical signals corresponding to field changes of various mileage wheels; step 2: carrying out filtering and amplification processing on the pulse electrical signals respectively; step 3: carrying out A/D conversion on the pulse signals being processed in the step 2; step 4: carrying out secondary filtering processing on the digital pulse signals subjected to A/D conversion in the step 3; step 5: carrying out judgments of mileage wheel abnormality and pipeline turning; step 6: selecting and outputting an optimal mileage pulse signal currently; step 7: calculating the mileage of the in-pipeline detector. By applying the mileage measuring device and method of the in-pipeline detector, the stability of the detection speed and the mileage pulse signal of a system can be guaranteed, the anti-interference of the system is improved, and the mileage measurement accuracy and the output of the optimal mileage are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of pipeline detection, and in particular relates to a mileage measurement device and method for a detector in a pipeline. Background technique [0002] With the increase of oil pipelines and the increase of pipeline laying distance, oil and gas pipelines are prone to cracks, corrosion pits, and pipe wall thinning under various complex and harsh environmental conditions, which will bring major safety hazards and economic losses. Internal defect detection of long-distance pipelines is very necessary. Accurate location of corrosion defects is a key technology for in-pipeline detection, and accurate mileage measurement is an important guarantee for accurate location of corrosion defects. [0003] At present, the mileage measurement of pipelines has good real-time detection technology, but lacks systematic and high-precision detection devices. Especially in the micro-defect detection system, high sampling frequ...

Claims

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Application Information

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IPC IPC(8): F17D5/02
Inventor 汪刚吴振宁冯健刘金海张化光马大中周坤高亮黄珊许相凯卢森骧屈纯刘喆王一张康康
Owner NORTHEASTERN UNIV
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