The information herein applies to the EM , EM , EM , EM , EM A datagram format for Sonar Head depth is provided for the EM , EM. Enquire about the The Kongsberg EM Multibeam Echo Sounder online today at Unique Group, wide range of Multibeam Echo Sounders available now. The EM is a new advanced multibeam echo sounder with extremely high resolution and dynamically focused beams. It is very well suited for detailed.
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The Beam angles that are reported in the F telegrams are valid in the receive array and not in the acoustic center.
Important Driver will stop updating if no C clock datagrams are received for more than 30 seconds. Backscatter, or raw seabed image intensity values, are stored in the S datagram.
The driver will correct the reported beam angles so they are valid for the acoustic center.
For the TPU calculation the minimum steering angle can be defined. Decoding Notes Driver will always output the decoded maximum number of beams with a maximum ofEM Note that choosing the valid flank is not very relevant for very short PPS pulses e. The letters following the port number are an indication of the datagrams, which are to be output on this port. If you want to decode the backscatter, see the Simrad EMx for more details.
This non-conformity will result in small depth independent depth errors at the outer beams. When online, select the “Echosounder settings” option from the “Settings” menu to define the online blocking and filtering of the multibeam echosounder data.
In DbSetup for this driver some driver specific settings can be entered. In order to activate the transmission, one should do the following: DbSetup example for Simrad Compact system. Choose one of the “Head II” systems to decode the beam data from the second transducer. No real time sound velocity QINSy only supports beam angle corrections when a sound velocity probe is interfaced.
An EMD system must be configured in Database Setup as two single EM Multibeam systems that have a node position and unique mounting angles per transducer. This pulse is half a second long so when the wrong active flank is chosen timing can be off by half a second. Refer to the GPS Manufacturer manual to see which is the active flank.
EM 3002 Multibeam echo sounder
Beam Intensity values backscatter that are stored in the datagram have a range from to 0. Only a limited number of packets will be stored: QINSy assumes the beam angle and the range to be valid at the acoustic center. These supersede the command line parameters.
Acoustic center is 2. D datagram for position of footprints C datagram to determine internal EM clock drift and offset.
Support EM Multibeam echosounder – Kongsberg Maritime
Launch angle correction can be calculated by comparing the used sm3002 velocity reported by the multibeam system with the actually measured sound velocity. This is done to prevent latency related errors. The QINSy driver will restore invalid beams, by resetting all values to 0, except for quality factor and intensity, which are set to the invalid values according to the EMx manual, i. This means that the correct sound velocity value as obtained from the sound speed profile must be entered into the multibeam controller software.
Invalid beams are restored to the MBE data buffer, with all values set to 0, except quality factor FFh and intensity 7Fh. The clock datagram is used to identify the main transducer head’s serial number and therefore the clock message must always be activated.
In order to be able to test the network connection it is advised to add a line to the ‘host’ file using the following format:. Recommended Mode F datagram for raw ranges and angles C datagram to identify the serial number from the main head R datagram for raw bathymetry storage as of QINSy version 8 the offset from the clock telegram is no longer used for the EM X-Y-Z mode D datagram for position of footprints C datagram to determine internal EM clock drift and offset “Raw-Data” D datagram is identical to ordinary D datagram except that some variables like for example the em33002 depression angle are now attitude-uncompensated launching kongsbrrg.
The drawing below shows a schematic overview of the acoustic center. See konsgberg in Database Setup, except that the present QINSy driver is only meant for datagrams broadcast over a network, so instead of entering serial port parameters, the port number has to be entered.
Kongsberg EM – Forum Energy Technologies
The Acoustic center is the point for which the node position must be entered into the QINSy database. Only the beam numbers are different. QPS advises however to keep this enabled. In order to be able to test the network connection it is advised to add a line to the ‘host’ file using:.
For amplitude bottom tracked beams this value stands for the used number of samples while for phase bottom tracked beams this value stands for the “fit”. This echosounder uses pitch compensation and therefore it requires the serial input of an attitude sensor EM binary format. FF Hex and 7F Hex, respectively. The IP-address and port number are for the machine to which these datagrams are to be sent.
Real-time sound velocity fed into Multibeam Unit If the sound velocity can be interfaced real-time into the multibeam system then the beam angles that are reported by the system to QINSy are correct and no further angle correction is required. F datagram for raw ranges and angles D datagram for sampling frequency not included in F datagram C datagram to determine internal EM clock drift and offset. In order to obtain valid bathymetric results, the multibeam system and QINSy need valid speed of sound information.
F datagram for raw ranges and angles C datagram to identify the serial number from the main head R datagram for raw bathymetry storage as of QINSy version 8 the offset from the clock telegram is no longer used for the EM By default this option is enabled but it can be disabled if necessary through the registry key: Each head has beams starting with 1 at the port side of the matching transducer.
The EM manuals will mention the acoustic center to be in the geometric center of the transducer face but this is not exactly true: