Teledyne Everywhereyoulook WAYFINDER, Руководство пользователя

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Wayfinder DVL Guide P/N 95P-6001-00 (October 2020)
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Page 5
Chapter 2 – System Integration
This chapter is intended to provide the necessary and often critical implementation and integration con-
siderations for the use of Wayfinder systems on various platform types. In addition, the procedures de-
scribed provide a step-by-step guide that will enable the client to configure the Wayfinder DVL sonar for
optimum utilization.
Mechanical Integration Considerations
Before choosing a mounting location, keep in mind the following mounting requirements.
Table 2. Wayfinder Mounting Checklist
Mounting Criteria Critical
Requirement
Vehicle
Dependent
Notes
Location on centerline Mechanically mount the center of the Wayfinder as close as
possible to the vehicle’s fore-to-aft centerline.
Level pitch/roll Mount the Wayfinder as level as possible using the vehicle’s roll
and pitch references.
Beam clearance Clear the Wayfinder beams of any acoustic obstacles. A 90-de-
gree cone around the face of the Wayfinder should be observed
to account for each beam acoustic spread.
Bottom strike protection Ensure there is a section on the hull/platform that is lower than
the Wayfinder location to protect from bottom strikes.
X Y axis alignment Typical alignment is Beam 3 (instrument Y-axis) rotated 45° rela-
tive to the vehicle forward axis or Beam 3 facing forward.
Cable routing Tight mounting spaces next to bulkheads may require rotating
the Wayfinder to prevent sharp bends in the cable.
Flow noise/cavitation May need a fairing to reduce flow noise and/or cavitation.
Isolation Hardware Use M5 isolating bushings and washers when mounting the
Wayfinder to a metal structure.
Location on Centerline
The mechanical alignment of the Wayfinder is important to data accuracy. Mechanically mount the center
of the Wayfinder as close as possible to the vehicle’s fore-to-aft centerline. Although it is preferable to
mount the Wayfinder on the centerline, other components or structural items may make this impossible.
Balance this requirement with the other critical requirements when choosing a mounting location. As dis-
tance from the centerline increases, accelerations caused by vessel rotation also increase. These accelera-
tions can cause additional uncertainties in Wayfinder velocity measurements.
Level Pitch & Roll
Mount the Wayfinder as aligned as possible with the vehicle’s frame of reference. Bottom Track only per-
forms up to around 15-degree tilt or slope (angle of incidence). To assure the best performance over slop-
ing bottom topography or system tilt, the system should be mounted as close to level as possible.
Significant misalignment in mounting may require post-processing to re-align the reference frames.