| 摘要 |
A data transfer apparatus (22) for transferring data from a first part (12) of a measuring apparatus (2) to a second part (14) is disclosed. The data transfer apparatus comprises a signal transmitting part (24) mounted to the second part and having first antenna (28) for receiving first electrical signals representing data from the second part and emitting electromagnetic radiation corresponding to the first electrical signals, and a signal receiving part (26) mounted to the first part such that the signal receiving part is separated from and rotates relative to the signal transmitting part. The signal receiving part comprises a second antenna (30) for receiving electromagnetic radiation and generating second electrical signals corresponding to the first electrical signals. The signal transmitting part and the signal receiving part include respective radiation guide means adapted to cause less attenuation of the electromagnetic radiation passing through the radiation guide means than when passing through water, so that the electromagnetic radiation can be continuously transmitted from the signal transmitting part to the signal receiving part, and at least some of the electromagnetic radiation is transmitted from a first antenna to the second antenna via a path including the radiation guide means. The apparatus may be used in an undersea pipeline inspection apparatus. |
