| 摘要 |
PROBLEM TO BE SOLVED: To configure such that the quantity of fuel included in a tank can be detected as easily as possible, anytime and accurately in the fuel tank.SOLUTION: A scintillation glass fiber (2) is wound around a fuel tank (1). In a central part of the fuel tank (1), a gamma ray emitter (3) is disposed. An optical sensor (8) is provided additionally in the glass fiber (2). |
