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System Variants: SES-2000 ROV

SES-2000 ROV Hardware

The system SES-2000 has all the advantages of the parametric acoustics, like the small beamwidth at low frequencies, deep penetrations with high resolutions of layers and objects and very accurate depth measurements with the high frequency.
The system has the possibility to store the data digitally but gives also during the online processing excellent and reliable results.

The variant SES-2000 ROV is designed for ROV mounted applications with a depth rating of 1500m for the sub-sea bottle and the transducer.

Technical Parameters

Transducer:

 nonlinear transmitter, linear receiver
beamwidth +/- 1,8°
Transmitter: primary frequency:
secondary frequencies:
electrical power:
source level:

electronical beam stabilization and beam steering

 100 kHz
5, 6, 8, 10, 12, 15 kHz
>18 kW
>236 dB/µPa re 1m
Pulse Width: 66 µSec ... 500 µSec
Pulse Repetition Rate:

 up to 50/sec depending on range
Depth Rating:
Water Depth Range:

 1500 m
2 m ... 400 m below transducer
Operating Range:

 5 m ... 200 m
Sound Velocity Range:

 1400 m/s ... 1600 m/s
Penetration:

 up to 50 m depending on sediments and frequency
Resolution:

 sampling resolution: > 1 cm
multiple target resolution: > 5 cm
depending on frequency and operating range
Accuracy:


 100 kHz : 0,02 m + 0,02 % of water depth
10 kHz : 0,04 m + 0,02 % of water depth

Trigger:


 internal: depending on time control, output available
external: input available, TTL compatible

Receiver Channels:

 1 channel primary frequency
1 channel secondary frequency

Gain Controls:

 AGC or manual 0 ... 90 dB in 1 dB steps
Time Variable Gain
Digitization:

 16 bit (real dynamic 14 bit)

Signal Processing: noise reduction: stacking rate up to 64
DSP to increase signal-to-noise ratio, resolution and
penetration,
online view of processed echo data,
replay of recorded data

Data Output: online storage of echo envelope in chosen range,
online storage of raw signal in chosen range,
system parameters and navigation data on hard disk
backup: USB 2.0 interface for HD, MO-Disk or others
serial output for depth, time, position
online colour echo prints and thermal recorder prints

Data Input: serial input for navigation data (NMEA compatible)
serial input for motion sensor for heave compensation
and roll/pitch compensation
remote control via TCP/IP network
System Components: Sub-sea bottle containing all transmitter, receiver and signal
processors (anodized aluminium, diameter 45 cm, length 79 cm,
weight in air 140 kg, integrated pressure sensor)
Transducer (stainless steel, diameter 42 cm, height 15 cm,
weight in air 53 kg)
Connectors on the sub-sea bottle for transducer, up/down link,
trigger, power supply and service)
System control via 10 MBit Industrial Ethernet and TCP/IP network
interface from external PC

Operating Conditions: 115-230 V AC +5%/-10%, 50 - 60 Hz,
power consumption < 500 W
operating temperature: 0°C ... 40 °C



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