Correlative oil leakage area imaging radar system of oil pipeline

An oil pipeline, imaging radar technology, applied in radio wave measurement systems, radio wave reflection/re-radiation, utilization of re-radiation, etc. rate increase effect

Inactive Publication Date: 2011-09-07
SHAANXI YANCHANG PETROLEUM GRP +1
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  • Abstract
  • Description
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Problems solved by technology

[0004] Most foreign and domestic ground penetrating radar products use the signal form without carrier shock. The ground penetrating radar without carrier shock has the advantage of simple system. Generally, only shock signal generator, transmitting antenna, receiving antenna and receiving antenna are needed. The processing unit can be realized, but the radar without carrier shock cannot use the phase information of the echo, and the radar resolution will be limited to a certain extent

Method used

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  • Correlative oil leakage area imaging radar system of oil pipeline
  • Correlative oil leakage area imaging radar system of oil pipeline
  • Correlative oil leakage area imaging radar system of oil pipeline

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Embodiment Construction

[0034] refer to figure 1 , including a radar signal transmitting circuit, a radar signal receiving circuit and a radar imaging processing unit, like a traditional radar system, transmit radar waves to a target or receive a reflected signal of a target through a radar antenna (transmitting antenna and receiving antenna), the buried In the detection and imaging of underground oil pipelines, the maximum detection depth is required to be 3.5 meters, that is, the distance difference between the target local oscillator and the target echo is about 7 meters, so the intermediate frequency of the received echo has a bandwidth of (at this time The dielectric constant of the earth is estimated by 9):

[0035]

[0036] In the above formula is the bandwidth of the received signal, is the modulation frequency of the transmitted chirp signal, is the speed of light, The dielectric constant of the earth, is the maximum operating distance.

[0037] This requires the transmitter to...

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Abstract

The invention belongs to the technical field of radar imaging, and particularly relates to a correlative oil leakage area imaging radar system of an oil pipeline. The correlative oil leakage area imaging radar system is characterized by at least comprising a DDS (direct digital synthesis) linear frequency modulation signal generation circuit, a frequency source, a signal transmitting circuit, a signal receiving circuit and an imaging processing unit. The correlative oil leakage area imaging radar system has no restriction for the radar resolution by using the phase information of echoes.

Description

technical field [0001] The invention belongs to the technical field of radar imaging, in particular to a coherent imaging radar system for the oil spill area of ​​an oil pipeline. It can be applied to ground-penetrating radar imaging, and can also be applied to imaging systems in other near-field applications, such as through-wall radar imaging systems. Background technique [0002] In recent years, the detection of buried underground target objects has gradually become one of the great development directions of today's radar applications due to the traction of demand. GPR can be used in mine detection, non-destructive testing of highways, detection of underground bunkers and archaeological excavations. At present, there are relatively mature products on the market for ground-penetrating radar such as non-destructive testing of highways. At present, the domestic ground penetrating radar is basically based on detection, and has no imaging function. However, the imaging func...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
Inventor 王香增高瑞民刘立李建东王成达唐禹张永强邢孟道李辉张世君刘杰何飞
Owner SHAANXI YANCHANG PETROLEUM GRP
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