Development of the ultrasonic buffer rod for the molten glass measurement

Numerical analysis of the phased array imaging with a stacked plate buffer

“…Buffer rods are often used for ultrasonic measurements at such high temperatures. 23,24) The buffer rod is a rod-like material coupling an ultrasonic probe with a hot object. It transmits ultrasonic waves, and the rod is cooled by water or air cooling to keep the contact area with the ultrasonic probe below a temperature that the probe can withstand.…”

Numerical study on optimum design of a clad waveguide for ultrasonic pulse-echo measurements with high signal-to-noise ratio

“…To overcome such problem, clad waveguides (often called clad buffer rods) consisting of a core rod and a cladding layer were developed and it was experimentally demonstrated that the spurious echoes are significantly reduced by the cladding effect (Jen, et al, 1996. Such clad waveguides were applied to several materials and process monitoring at high temperatures, such as die-casting process monitoring (Moisan, et al, 2001), curing process monitoring of molten polymer (Legros, et al, 1999), plastic forming process monitoring (Piche, et al, 1999), imaging and material characterization in molten zinc (Ihara, et al, 2000), injection molding process monitoring (Wang, et al, 1997), high spatial resolution measurements in high temperature liquid (Rehman, et al, 2001), on-line monitoring of liquid magnesium (Burhan, et al, 2003), particles detection in molten aluminum (Ihara, et al, 2004), process monitoring of semi-solid magnesium die casting (Jen, et al, 2004), cleanliness evaluation of molten light metals (Ono, et al, 2004), in-situ observation of solid/liquid interface of aluminum alloy (Burhan, et al, 2005) and molten glass measurement (Ihara, et al, 2015). Thus, clad waveguides provide desirable pulse-echo measurements with high SNR and are highly expected to be a powerful tool for various materials monitoring at high temperatures.…”