| 摘要 |
PURPOSE:To avoid troubles of interruption of communication or electromagnetic wave disturbance due to disconnection and leakage of seal and the like, by using a liquid in a pipeline as a transmission medium of signals. CONSTITUTION:The pipeline 1 is filled with the liquid 2, and the pipeline 1 is fitted with two signal transceivers A, A' at a prescribed position so as to transmit ultrasonic waves in the liquid 2. The signal transceivers A, A' transmit the ultrasonic wave signal to the liquid 2 or receive the sound waves from the liquid 2. Thus, the two transceivers A, A' transmit and receive signals through the liquid 2. |
