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Tritech Gemini Narrow Beam Imager (NBI)

Narrow Beam Imaging

The Gemini NBI offers a narrow vertical beam and 130° swath. The Gemini NBI produces an acoustic image, cutting through the water with a narrow acoustic beam and at the high refresh rate users can expect from the Gemini range of multibeam sonars.

  • Tritech Gemini Narrow Beam Imager (NBI)
Tritech
Peregrine Road / Westhill Business Park
AB32 6JL Westhill

Description

Based on the proven design of the Gemini 720i, the Gemini NBI uses a 1° vertical beam instead of the 20° vertical beam found on the 720i. This reduced beam width allows the user to more precisely identify the position of the acoustic targets than is possible with a wide beam imaging sonar which is commonly used for obstacle avoidance operations.

Operating at 620kHz the Gemini NBI is able to produce images with 10mm range resolution while the 0.5° horizontal angular resolution results in an extremely sharp sonar image. Where monitoring your position relative to a known target is the objective and not general obstacle avoidance, then the Gemini NBI can help guide you safely to the desired target.

The multibeam transducer design used for the Gemini NBI results in a 130° sector scan width and advanced technology allows update rates as high as 30 scans per second. With wide angle imaging and a high refresh rate the user is able to quickly and effectively manoeuvre to a target in poor visibility conditions.

Depth rated to 4000m and manufactured from titanium the Gemini NBI has been designed to work in the harshest of environments such as those typically found in subsea mining and excavation.

Specifications

  • Year of initial development
    2014
  • Receive array length [m]
    0
  • Receive array width [m]
    0
  • Receive array height [m]
    0
  • Transmit array length [m]
    0
  • Transmit array width [m]
    0
  • Transmit array height [m]
    0
  • Receive array weight in air [kg]
    0
  • Transmit array weight in air [kg]
    14.6
  • Max. depth [m]
    4000
  • Min. frequency [kHz]
    620
  • Max. frequency [kHz]
    620
  • Typical range [m]
    120
  • Minimal detectable range [m]
    0.5
  • Max. number of beams
    256
  • Min. horizontal beam width [deg]
    0.5
  • Max. horizontal beam width [deg]
    1
  • Min. vertical beam width [deg]
    1
  • Max. vertical beam width [deg]
    1
  • Min. pulse length [µs]
    25
  • Max. pulse length [µs]
    200
  • Max. update rate [Hz]
    30
  • Range resolution [cm]
    0.01
  • Min. DC power [V]
    22
  • Max. DC power [V]
    75
  • Min. AC power [V]
    0
  • Max. AC power [V]
    0
  • Max. power consumption [W]
    37
  • Data processing software
    Proprietary software and Tritech Seanet Pro software
  • Operating System
    Windows 2000, Windows XP, Windows Vista, Windows 7
  • Minimal hardware requirements
    0
  • Data storage capacity [Gb]
    0
  • External data storage options
    0
  • Interface options
    Ethernet or VDSL
  • Motion correction
    0
  • Carrier options
    AUV, fixed, ROV
  • Mount options
    Pole mount or ROV fixed
  • Connector options
    Burton 5506 Series
  • Main applications
    ROV/AUV navigation; obstacle avoidance; target recognition; search and salvage

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