光ファイバを用いた電磁超音波共振法による配管減肉測定
Measurement of Pipe Wall Thinning by Ultra Acoustic Resonance technique using Optical Fiber
著者:
白井 武広 Takehiro SHIRAI 町島 祐一 Yuichi MACHIJIMA
発刊日:
公開日:
EMATOptical FiberPipe Wall ThinningResonance frequencyThermal resistance
概要
This is the novel system for Pipe Wall Thickness measurement which is combined EAMT(Electro Magnetic Acoustic Transducer) and Optical Fiber Sensor. The conventional ultrasonic thickness me ter is using in pipe wall thickness measurement. However, it is necessary to remove a heat insulator from pipe line. A characteristic of this novel system is that it is possible to measur e without removing a heat insulator and on-line monitoring, because of measurement probe is attached between pipe surface and heat insulator. As a result of measured with this system, we c ould measure 30mm thickness of carbon and stainless steel at the maximum and pipe specimen of elbow shape. Heat-resistant characteristic confirmed at 200 degrees C until about 7000 hours.
