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4
2.
SYSTEM DESCRIPTION
2.1 VAF ShaPoLi solution
VAF ShaPoLi solution is a data collection, calculation, and presentation box, intended to handle data
from a ships shaft power meter. This manual describes the combination of the Bridge Panel PC with the
SDB-3 (ShaPoLi Data Box). The SDB-3 can calculate torque, speed, and power output data. The Bridge
Panel PC in combination with the SDB-3 can manage two T-sense/TT-sense sensors. Alternatively, it is
also possible to connect one or two 3
rd
party torque meters. The GPS and NMEA signals are required
signals and are used for position and speed.
The SDB-3 converts all these input signals to one RJ45 Ethernet signal for monitoring purposes through
a Bridge Panel PC.
The digital output signal is available for connection an external system like an Alarm and Monitoring
System.
Functions, which can be performed with the SDB-3 and Bridge Panel PC system are:
•
Measurement of the torque, shaft speed and power with one or two VAF T-Sense
®
or TT-Sense
®
sensors.
•
Measurement of the torque, shaft speed and power with one or two 3
rd
party Torque sensors.
•
Displaying of the actual shaft speed, shaft power and the EEXI power limit.
•
Triggers a visible and audible alarm when EEXI power limit is exceeded by the shaft power.
•
Activates a digital output when the EEXI power limit is exceeded by the shaft power.
•
Starts logging data when the EEXI power limit is exceeded.
•
Other inputs are included in the logfile like for example GPS and NMEA-inputs.
The SDB-3 can be installed in the vicinity of the T-Sense/TT-sense/3
rd
party Torque meter or in the engine
control room (ECR).
The Bridge Panel PC can be installed on the bridge.
2.2 SYSTEM SECURITY
Besides checking the status of the torque measurement system, the SDB-3 also checks itself
continuously for program and configuration data integrity, normal program flow and power supply
conditions. All alarm messages will be logged in a dedicated alarm screen on the Bridge Panel PC.