| 摘要 |
An apparatus for measuring a level of molten metal using electromagnetic waves which allows high-accuracy measurement of a level of molten metal without the requirement for time and labor consuming operation is provided. The apparatus includes a first conductive portion (1001A) and a second conductive portion (1001B) which are made of carbon and integrated into an immersion nozzle (100) separately from each other; and a distance measuring section (200, 300) which sends a signal forming a first pseudo random signal to the first conductive portion, receives from the second conductive portion the signal which has propagated through the first conductive portion, the molten metal and the second conductive portion, multiplies the signal by a second pseudo random signal which has the same pattern as the first pseudo random signal and has a frequency slightly different from the frequency of the first pseudo random signal to obtain a product of the two signals and measure a propagated distance of the signal based on temporal pattern of a signal of the product or a signal generated using the product. |
