| 摘要 |
A method and a device determine a height of a fluid level in a fluid container by: emitting a sound signal by a transmitter and recording sound signals reflected at the fluid level and at the reference elements; determining, for the recorded sound signals, a first propagation time difference between a first propagation time of the sound signal emitted by the transmitter and reflected at the first reference element and a second propagation time of the sound signal emitted by the transmitter and reflected at the second reference element; determining a second propagation time difference or a third propagation time difference; and determining the height of the fluid level based upon the first propagation time difference, the second propagation time difference and the first distance or based upon the first propagation time difference, the third propagation time difference and the second distance. |
