مروری بر روشهای بازرسی خطوط لوله

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکترا،دانشکده مکانیک،دانشگاه علم و صنعت، تهران، ایران

2 دانشکده مهندسی مکانیک/دانشگاه علم و صنعت ایران

چکیده

خطوط لوله به‌طور گسترده‌ای برای انتقال حجم زیادی از آب و فاضلاب در مسافتهای طولانی به‌کار می‌روند. این زیرساختهای ارزشمند زمانی توجه همگانی را به خود جلب می‌کنند، که آسیب دیده‌اند. به‌منظور اجتناب از وقوع حوادث ناگوار، تشخیص اولیه عیوب موجود در خطوط لوله آب و فاضلاب و تعیین کمیتی این عیوب، بسیار حائز اهمیت است. در تعداد زیادی از کشورها، بازرسی خطوط لوله آب و فاضلاب معمولا با استفاده از روش بازرسی دوربینی انجام می‌شود که یک اپراتور با ارزیابی تصاویر خام دوربین به شناسایی مکان آسیب‌دیدگیها می‌پردازد. روشهای بازرسی دوربینی دارای تعدادی معایب هستند که کاربرد آنها را محدود می‌سازد. یکی از معایب روش بازرسی دوربینی، نبود نور کافی و روشنایی در داخل لوله‌ها است. عیب دیگر روش بازرسی دوربینی این است که کیفیت تصاویر به‌دست آمده به‌دلیل شرایط روشنایی نامطلوب، پایین است. در نتیجه روشهای بازرسی دوربینی می‌توانند صرفا عیوب بزرگ را به‌طور مطمئنی تشخیص دهند. در دهه‌های اخیر، روشهای حرارت‌نگاری، میکروویو، لیزر و سونار پیشنهاد شده‌اند تا در ترکیب با روش بازرسی دوربینی، نتایج بازرسی را بهبود دهند. همچنین، تجهیزات جدیدی که چندین سنسور را به‌کار می‌برند و قادر به انجام بازرسی در مسافتهای دور هستند، پیشنهاد گردیده‌اند. مقاله حاضر به مرور روشهای بازرسی متداول و جدید در خطوط لوله آب و فاضلاب می‌پردازد. بعلاوه، انواع متفاوت رباتها برای بازرسی داخل لوله‌ها بحث می‌گردند.

کلیدواژه‌ها


عنوان مقاله [English]

A Review on Inspection Methods of Pipelines

نویسندگان [English]

  • Turaj Azizzadeh 1
  • Mohammad Riahi 2
1 Department of mechanical engineering, University of science and technology, Tehran, Iran
2 Department of mechanical engineering/Iran university of science and technology
چکیده [English]

Pipelines are widely used in transporting large quantities of water and sewage over long distances. These valuable infrastructures attract public attention only when they fail. The quantitative and early detection of defects in sewer pipelines is very important in order to avoid severe consequences. In many countries, sewer pipeline inspection is usually carried out using CCTV (Closed-Circuit TV) cameras and off-line human surveys through raw image assessment for failure identification. CCTV-based techniques have some limitations that restrict their implementation. One of the disadvantages of CCTV-based techniques is the lack of visibility in the interior of the pipes. The other disadvantage of CCTV-based techniques is the poor quality of the obtained images because of difficult lighting conditions. In consequence, CCTV-based techniques can only detect gross defects reliably. In recent decades, thermography, microwave, laser, and sonar-based techniques have been proposed to complement the conventional CCTV-based technique and to improve inspection results. Also, new inspection devices employing multiple sensors and being capable of carrying out remote sewer inspection tasks have been proposed. This paper presents an overview of the conventional and novel inspection technologies for sewer pipelines. Furthermore, different types of robots for in pipe inspection tasks are discussed.

کلیدواژه‌ها [English]

  • Sewer pipelines
  • CCTV-based inspection technique
  • Multi-sensor inspection technique
  • Pipe inspection robots

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