ALD® ROV inspection mode

The ALD® system can be interfaced with a Remote Operated Vehicle to inspect for leak subsea installations including pipelines (in line inspection) and connections (point inspection). The ALD-ROV set is mainly composed by an acoustic sensor to acquire the acoustic data, a POD for pre-processing and digital conversion, a transmission line (the ROV umbilical), a surface receiver for hardware processing and an PC-based software to analyse and display the results. The sensor is installed on the ROV manipulator on a dedicated boom the POD is fixed to the vehicle frame.

Features

This technique allows very accurate positioning of the sensor while the background noise generated by the vessel and the vehicle is reduced by precautions involving physical shielding, hardware filtering and signal processing. The sensor has the same electrical requirements of a standard underwater camera in order to be compatible with virtually any vehicle. The power (12-30 Vdc) is supplied directly by the vehicle while the signal reaches the on board ALD® receiver trough the ROV umbilical.