Changes between Initial Version and Version 1 of DeploymentPreparation

Timestamp:

Oct 19, 2016, 10:09:31 AM (9 years ago)

Author:

indrek

Comment:

--

DeploymentPreparation

@@ +1 @@
+{{{
+#!div style="max-width:900px;margin:auto"
+
+[[Image(OV logo neutral medium.jpg, 300px, center)]]
+
+= Deployment Preparation =
+== Introduction ==
+
+This guide is aimed to the the team responsible for deploying the Shipborn Lidar on a vessel 
+or a rig. It will specify the conditions about system placement that need to be met for
+optimal performance. Also, it will specify the information Ocean Visuals needs to prapare the
+fastenings.
+
+== Deployment on a ship == 
+
+The laser beam should be aimed at the point where the ship movement would not create foam.
+This depends on the shape and hydrodynamics of the ship. Most common case is shown on the 
+figure on the right. The safest place would be in the bow of the ship, slightly to either
+side, so the beam would hit water in front of the vessel.
+
+[[Image(Ship_top.png, 300px, right, top)]]
+
+The laser beam should not travel more than thirty meters before hitting the water. More than
+that and the signal will not travel back to the Measurement device. Beam distance may be calculated by 
+taking the the square root of sum of h squared and l squared.
+
+[[Image(Beam_distance_formula.png, 100px)]]
+
+The distance will change due to waves and rocking of the vessel, so deploying the measurement
+device so the lenght of the beam aproaches maximum distance limit should be avoided. The tolerance
+needed depends on the most likely working conditions and should be estimated based on experience. 
+
+[[Image(Ship_front.png, 300px)]]
+
+== Deployment on a rig == 
+
+On a rig the position of the Measurement device should be choosen so it's field of view would not be blocked
+by ships or any other obsticle. The laser beam lenght limit is the same as with the deployment
+on a vessel and the change in length due to waves should be taken into account.
+
+[[Image(Rig.png, 300px)]]
+
+== Junction Box ==
+
+Junction Box contains electrical and information techology devices that power the Lidar and 
+save the measurement results from the Lidar. Junction Box needs to be connected to ships 240V
+power system and to ships local area network. The Junction Box needs to be indoors since it's
+not wather proof nor climate controlled. 
+
+The cable connecting the Junction Box with the Lidar should not be longer than 40 m in order
+to guarantee sadisfactory data transfer reliability. The location for the junction box 
+should be picked accordingly. The junction box dimentions are L:50cm W:40cm D:20cm.
+
+== Additional information ==
+GPS antenna connected to Measurement device is sensitive to high power radio pulses from a radar.
+If possible select a position for the Measurement device so it would not be in line of sight with
+a powerful radar. If this is not possible separate antenna may be placed to a more suitable position
+and connected to Measurement device via cable. 
+
+}}}