| 摘要 |
<p>PURPOSE:To achieve avoidance of damage and accurate installation of a cable, by mounting corner reflectors with a better reflection efficiency for ultrasonic waves discretely on the cable to enable the capturing of the position and attitude thereof during and after the installation thereof. CONSTITUTION:This apparatus is equipped with ultrasonic wave reflection bodies 5 mounted discretely on a submarine cable 4, an ultrasonic wave transmitter and an ultrasonic wave receiver arranged on a cable installation ship 1 or a monitor ship 2 and an analysis recorder 3 of received signals. The reflection bodies 5 are each made up of a corner reflector section 5-1 for sending reflected waves in the direction of incoming ultrasonic waves, a buoyance generating section 5-2 and a mounting section 6 for a cable. The corner reflector section 5-1 is so set that the opening thereof is vertical to the sea surface by a buoyance with the buoyance generator section 5-2 while mounted on the cable at intervals of several m - several ten m.</p> |
