Kongsberg EM 3002 Caractéristiques techniques

EM 3002

Multibeam echo sounder

Product Description

Kongsberg EM 3002

Multibeam echo sounder

Product description

855--164929 / Rev.A

Note

Kongsberg Maritime AS makes every effort to ensure that the information contained

within this document is correct. However, our equipment is continuously being

improved and updated, so we cannot assume liability for any errors which may occur.

Warning

The equipment to which this manual applies must only be used for the purpose for

which it was designed. Improper use or maintenance may cause damage to the

equipment or injury to personnel. The user must be familiar with the contents of the

appropriate manuals before attempting to install, operate or maintain the equipment.

Kongsberg Maritime AS disclaims any responsibility for damage or injury caused by

improper installation, use or maintenance of the equipment.

E2004 Kongsberg Maritime AS

The information contained within this document remains the sole property of

Kongsberg Maritime AS. No part of this document may be copied or reproduced in any

form or by any means, and the information contained within is not to be communicated

to a third party, without the prior written consent of Kongsberg Maritime AS.

Contact information

Support: [email protected]

Sales: [email protected]

24 hrs support telephone: +4799203801

Strandpromenaden 50

P.O.Box 111

N-3191 Horten,

Norway

EM 3002 / Base version

II 855-164929 / A

Table of contents

1SYSTEMOVERVIEW 1.....................................

Key facts 1...............................................

System characteristics 2.....................................

2PERFORMANCE 5..........................................

3 INSTALLATION 13..........................................

Introduction 13.............................................

Operator Station 13.........................................

Processing Unit 13..........................................

Sonar Head 13.............................................

4OPERATION 16..............................................

System control 16...........................................

Data logging 18............................................

5 POST-PROCESSING 19.....................................

Post-processing options 19....................................

Brief descriptions 19........................................

6 CUSTOMER SUPPORT 20....................................

Introduction 20.............................................

Installation 20..............................................

Documentation and training 20................................

Service 20.................................................

FEMME 21...............................................

Terms and conditions 21.....................................

7 SCOPE OF SUPPLY AND OPTIONS 22......................

Standard system 22.........................................

Options 22................................................

System integration 22........................................

8 TECHNICAL SPECIFICATIONS 24..........................

Overall specifications per Sonar Head 24........................

Interfaces 24...............................................

Physical specifications 25....................................

Environmental and EMC specifications 26.......................

Product description

III

855-164929 / A

Document logistics

Rev Date Written Checked Approved

A11.03.04 EHa FP KN

(The original signatures are recorded in the company’s logistic database.)

Rev Comments

AOriginal issue.

Product description

855-164929 / A

1SYSTEMOVERVIEW

Key facts

The Kongsberg EM 3002 multibeam echo sounder is a very

high resolution seabed mapping and inspection system meeting

the most demanding standards for survey accuracy. The

minimum operating depth is from less than 1 m below its

transducers, and in typical sea water conditions the system

operates to more than 150 m depth (less in warm water and

more in fresh water). Small dimensions and low weight makes

the system portable and easy to install. This allows use on

survey launches and subsea vehicles to 1500 m water depth.

The EM 3002 system has a very high ping rate of up to 40 Hz, a

large number of measurements per ping (up to 254 per sonar

head), 1.5°beamwidth, and electronic pitch and roll

stabilization. 100% coverage of the bottom is achievable at

vessel speeds of about 10 knots in shallow waters with

acrosstrack coverage of up to four times depth with a basic

system. At larger depths the achievable coverage may be up to

200 m, and then 100% coverage is achievable with vessel

speeds up to 20 knots.

The EM 3002 may be configured to use two sets of transducers

(Sonar Heads). This increases the shallow water coverage to up

to ten times the depth, and the number of measurements per

ping up to 508. With an angular coverage sector of nominally

200°(with the heads tilted 40° to each side) the dual system also

allows surveying to the water surface along shorelines, river

banks and man-made structures.

The EM 3002 beamspacing may be set to equiangular or

equidistant. The beams are electronically roll stabilized. The

coverage may be limited by the operator either in angle or in

swath width without reducing the number of beams. In the near

field dynamic focussing is employed. A combination of phase

and amplitude bottom detection algorithm is used, resulting in a

measurement accuracy of 5 cm RMS being achievable.

The system sonar frequency is nominally 300 kHz allowing

small dimensions, good range capability and high tolerance to

turbid waters. The transmit fan may be widened as an aid to

target detection. Integrated seabed acoustical imaging capability

is included as standard. Options include display and logging of

beamformed water column data and of raw stave data (before

beamforming).

EM 3002 / Base version

2855-164929 / A

The EM 3002 can be delivered either as a basic multibeam echo

sounder instrument for system integration, or as a complete

stand-alone seabed mapping system. The Operator Station, a

high-performance PC workstation, will always include the

necessary operator controls for setting and running the system,

data logging, and system testing. Normally the Operator Station

also includes an extensive set of graphical displays for data

quality control, but third-party software may instead be installed

for this purpose.

Postprocessing software for the EM 3002 is available from both

Kongsberg and third-party suppliers. A world-wide marketing

and service organization having many years of multibeam

experience is available for supporting the EM 3002.

→A system overview is shown in figure 1.

→Data example is shown in figure 9 on page 18.

System characteristics

Main units

The basic Kongsberg EM 3002 multibeam echo sounder

consists of three (or four) units:

•Sonar Head(s)

•Processing Unit

•Operator Station

The system may be delivered either with one sonar head (EM

3002S) or with two sonar heads (EM 3002D).The dual sonar

heads can be arranged in different ways. The most common

configuration is to mount the two sonar heads tilted about 40

degrees to port and starboard in order to obtain a wider swath

coverage.

A complete mapping system will in addition include a vessel

motion sensor, heading sensor, sound speed sensor and a

positioning system. For ROV applications a telemetry system is

required for data communication between subsea units and

surface electronics.

Sonar Head

The EM 3002 Sonar Head contains the transducers and all

transmitter and receiver electronics. The diameter of the Sonar

Head is 332 mm and it’s height 119 mm. The sonar head

material is titanium, making the unit robust, durable and 100%

non-corrosive. The transducers are replaceable in the event of

damage for example due to grounding.

Product description

855-164929 / A

The maximum deployment depth for the standard sonar head is

500 m. A sonar head is available for maximum 1500 m water

depth.

A single cable with an underwater plug connects the Sonar Head

to the EM 3002 Processing Unit. The cable is normally 15 m

long, optionally up to 45 m.

Existing EM 3000 sonar heads may be used in an EM 3002, but

a factory check-up is recommended.

Processing Unit

The EM 3002 Processing Unit performs the beamforming and

bottom detection. It further controls the sonar head with respect

to gain, ping rate, pitch compensation of the transmit fan and

roll compensation of the receive beams. It contains all interfaces

for time-critical external sensors such as vessel attitude (roll,

pitch, heading and heave), vessel position and external clock.

The Processing Unit is contained in an instrument case prepared

for mounting in a 19” rack (height 4U). All circuit boards are

plugable into a cPCI bus backplane giving a very robust

solution. Ethernet is used for data communication with the

Operator Station.

Operator Station

The Operator Station of the EM 3002 is the HWS 10 high

performance PC workstation with Kongsberg SIS software.

Additional third-party sw may be installed. The HWS 10 is dual

bootable to either Linux® or Microsoft Windows XP®.

Software for controlling the EM 3002 installation and runtime

parameters, data logging and running selftest on the system is

always included as standard.

The HWS 10 is normally supplied with a 17.4” industrial LCD

monitor with a resolution of 1240x1024 pixels. Support for a

second monitor is included. A spill-proof US keyboard and a

standard optical mouse is normally supplied, but optionally a

small IP 65 rated keyboard with integrated track stick can be

delivered.

EM 3002 / Base version

4855-164929 / A

Figure 1 EM 3002 System overview

(CD21510)

Storage

media

Processing Unit

Optional, may also be

connected to the ship's ethernet.

Interfaces:

Sound Speed Sensor

Tide

Center depth output

Ethernet

Internal

Ethernet

Serial interfaces:

Special interfaces:

Supply voltage:

Positioning systems

Attitude (roll, pitch and heave)

Heading

Clock

Trigger input/output

Clock synchronization

115 or 230 Vac 50/60 Hz

Sonar Head Second Sonar Head

(optional)

Operator

Station

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