top

This sub-bottom profiler is EdgeTech’s long running success story in providing Full Spectrum (“chirp”) imaging systems to customers who need the best in underwater acoustic imaging. Under any conditions when compared to other sub-bottom profilers, EdgeTech provides better images, more deployment options, and interface flexibility.

Three towfish options are available. The SB-512i has a frequency range from 500 Hz to 12 kHz. The SB-216S from 2-16 kHz, and the SB-424 from 4-24 kHz.

The 3200-XS system uses special design transmitters with low Q wideband characteristics best suited for “chirp” transmissions. If conventional off-the-shelf transducers are used then there is a need to compensate in software for the narrow band characteristics of the transmitters. The result is visible in the images created. At least two hydrophones are installed in the tow vehicle to reduce acoustic scattering from the sides. This results in a narrower across track beam pattern.

Preserved in the output of the EdgeTech's Full Spectrum chirp processing is the signal phase.
This phase information is also recorded to the mass storage device. This phase information is required for sub-surface sediment classification. Phase is used to determine if the impedance is increasing or decreasing.

EdgeTech separates the Full Spectrum signal processing and the signal amplifier out into separate housings. This lets a user interface to his own or a 3rd party topside display processors for command, control, display, printing and data storage.

EdgeTech offers several different tow vehicles that chirp over different frequency ranges. The same topside Full Spectrum signal processor, linear amplifier and tow cable are compatible with all of the vehicles. Use different tow vehicles for desired penetration and resolution. The FM pulse is user selected based on the sub-bottom conditions at the survey site and the type of sub-bottom features that need to be imaged.
APPLICATIONS 
  • EEZ resource development
  • Geo-technical surveys
  • Hazard surveys
  • Environmental site investigations
  • Geological studies
  • Sediment classification
  • Buried object location
  • Locate and map buried pipelines and cables
  • Mining and dredging surveys
  • Bridge and shoreline scour surveys
FEATURES
  • Unequalled images
  • 20-30 dB improved SNR over conventional sub-bottom profilers
  • Three tow vehicle options
  • SEG-Y and/or native JSF data file formats
EdgeTech 3200-xs Specifications
 Towfish Model SB-512i SB-216S SB-424
    Frequency Range 500 Hz - 12 kHz 2 - 16 kHz 4 - 24 kHz
    Pulses (user selected) 2-12 kHz, 2-8 kHz,
1.5-7.5 kHz, 1-6 kHz,
1-5 kHz, 0.5-5 kHz 		2-16 kHz, 2-12 kHz,
2-10 kHz 		4-24 kHz, 4-20 kHz,
4-16 kHz
    Vertical Resolution
    (depends on pulse selected) 		8 - 20 cm 6 - 10 cm 4 – 8 cm
    Penetration (typical)
    in coarse calcareous sand     (meters)
    in clay (meters)
20
200
6
80
2
40
    Beam Width
    (depends on center frequency) 		16° - 32° 17° - 24° 16° - 23°
    Size (cm) 160L x 124W x 47H 105L x 67W x 40H 77L x 50W x 34H
    Weight 190 kg 76 kg 45 kg
    Calibration Each system is calibrated for reflection coefficient measurements
    Cable Requirements 3 shielded twisted pairs (5 used)
    Maximum Towfish Operating     Depth 300 meters (1,000 feet)
    Optimum Tow Height 3 to 5 meters above seafloor
    Tow Speed 3-4 knots optimal, 7 knots maximum safe operational
    Options Integrated Depth Sensor, 4 kW Amplifier, USBL Acoustic Tracking System

　

　

　

　

海測硬體-右邊選單(繁體)
　
Untitled-1