| 摘要 |
PURPOSE:To measure the temperature distribution of a furnace directly by detecting the sound generated from a vessel inserted in a furnace and checking the sound generating source. CONSTITUTION:A part of a spherical vessel 1 made of a material with high melting point is composed of a material 2 with low melting point and an oscillation plate 5 is attached with a pin to the part of gas discharging hole 4 penetratd into a dia- phragm 3 separating the inside of the vessel 1 into 2 rooms. When the material 2 with low melting point which constitutes a part of the wall of vessel is melted and opened, high pressure gas inside the room 1a passes through the gas discharging hole 4 penetrated through the diaphragm 3 flows into the external through the said opening, making the oscillation plate 5 oscillate and th sound generate. The vessel 1 is inserted into the furnace and lowered inside the furnace. When the material with a low melting point reaches at its melting point, sound is generated. Sound detectors installed to respective parts of the inwall of the furnace detect the generated sound and the position of sound generation is found from the time difference of the sound detected in each detector. The temperature of the sound generating position is the same as the melting point of the material 2 with its low melting point. |
