Study on visual facility for turbid water

For the difficulty of the inspection and monitor for the cracks in tubular joint of offshore platforms and dam bodies, the visual facility for turbid water was developed based on the theory of round turbulent jets. Its primary principle was to make a visual field in the special zone so that the target in the field could be observed from the CCD. On the density distribution theory of turbid jets, the density distribution of turbid water in the first segment and principal segment of free rising jets was educed, and the visual field of jets has been validated by experiments. Experiment results indicate that the certain bulk visual field can be made in turbid water by the facility, the object can be observed in the field, the bulk of the field correlates with the size of jets.