利用光纤传感系统的无损探伤装置进行结构体的健康监测[光纳株式会社]-应用案例(step5)

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管道内壁侵蚀监测

土木结构体监测

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管道内壁侵蚀监测

应用案例

The data analysis algorithm depends on the diameter of monitored pipe.

Pipe diameter 4 inches or more
PPP-BOTDA* system offers 10 cm spatial resolution and thus provides enough measurement points for 3D inverse analysis. Inverse analysis enables the quantitative assessment (location, thinning size, remaining thickness etc.) of pipeline state.Note: *PPP-BOTDA = Pulse Pre-Pump Brillouin Optical Time Domain Analysis

Measuring point

Pipe diameter less than 4 inches
On the small-diameter pipe, the number of measurement points is lower than required for full 3D inverse analysis and qualitative or semi-quantitative methods are employed.

Measuring point

Qualitative analysis		Specify possible thinning location
		Determine UT inspection priority level
Semi-quantitative analysis		Set strain threshold value, thinning level, and
			corresponding warning level


Quantitative analysis is performed by means of inverse methods. Pipe thickness is estimated, location, and thinning shape is estimated using distributed strain data.
Pre-processing: Prepare the 3D mesh model / Apply
	boundary condition*
Analysis: Estimate the thinning shape and location
	*Boundary condition: load superposition principle

Qualitative analysis and alarm setting can be performed using threshold-based analysis of the measured data.

光纳株式会社（Neubrex Co., Ltd.）邮编:650-0023 日本兵库县神户市中央区栄町通1-1-24[map]

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