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Microwave sensor

A microwave sensor and sensor technology, applied in the direction of using microwave flaw detection, etc., can solve the problem of non-identity

Inactive Publication Date: 2019-11-15
HEROIT WATT UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although such sensors are non-contact devices and thus non-destructive, both require the material of interest to be positioned relative to the translational device and are therefore not truly portable

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Embodiment Construction

[0045] The present invention employs a method of creating a microwave sensor adapted to determine the presence of an anomaly of an asset comprising a material having at least one layer of coating material on its surface based on a frequency modulated continuous wave microwave signal. Such sensors include microwave transceivers and waveguides. The waveguide is operatively coupled to the microwave transceiver, and the microwave transceiver transmits a first frequency modulated continuous wave microwave signal. The signal is incident on the at least one layer of coating material, and the transceiver receives a second frequency modulated continuous wave microwave signal reflected from the at least one layer of coating material. The first and second frequency modulated continuous wave signals are combined into an intermediate modulated continuous wave signal having a phase difference from which the presence of corrosion is determined. Anomalies can include delamination, water ingr...

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Abstract

A corrosion sensor (1), adapted to determine the presence of corrosion in a material having at least one layer of a coating material on a surface thereof, is disclosed. The corrosion sensor (1) comprises a microwave transceiver (2); and a waveguide (3), with the waveguide (3) being operably coupled to the microwave transceiver (2). The microwave transceiver (2) transmits a first continuous wave microwave signal incident on the at least one layer and receives a second continuous wave microwave signal reflected from the at least one layer. The first and second continuous wave signals are combined into an intermediate continuous wave microwave signal having a phase difference indicative of corrosion in the material. Both the first and second continuous wave microwave signals are frequency modulated continuous wave signals. A method of sensing corrosion, a system for sensing corrosion and the use of a microwave transceiver to sense corrosion are also disclosed.

Description

technical field [0001] The invention relates to a microwave sensor suitable for determining the presence of an anomaly, usually corrosion, in an asset having at least one layer of coating material on its surface. Background technique [0002] Corrosion monitoring is needed in a wide range of industries from microelectronics to oil and gas pipelines. Typically, corrosion-sensitive materials have layers of insulating material on exposed surfaces, making it difficult to assess the level of corrosion by eye. Traditional monitoring methods include some level of destructive testing, such as sandblasting to remove layers of insulating material, enabling visual inspection of corroded material. Performing such a destructive test requires a certain amount of downtime for the asset in which the area is being inspected, so such testing is a commercially unattractive monitoring option. An improvement over destructive testing is the use of so-called non-destructive testing, in which lig...

Claims

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Application Information

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IPC IPC(8): G01N22/02
CPCG01N22/02
Inventor 马克·菲利普·伊夫·德穆利兹大卫·弗林大卫·赫德苏曼特·库马尔·帕夫鲁里
Owner HEROIT WATT UNIV