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Autosub Autosub Electronics and Data Electronics and Data

ProcessingProcessing

James PerrettJames PerrettOcean Engineering DivisionOcean Engineering Division

Southampton Oceanography CentreSouthampton Oceanography Centre

James.Perrett@soc.soton.ac.ukJames.Perrett@soc.soton.ac.uk

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OverviewOverview

The Electrical/Electronic The Electrical/Electronic ArchitectureArchitecture

Distributed Software Distributed Software ArchitectureArchitecture

Data Logging and ProcessingData Logging and Processing

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Power SystemPower System

Manganese Alkaline - 96V NominalManganese Alkaline - 96V Nominal Individual battery currents Individual battery currents

continuously monitoredcontinuously monitored Motor runs at raw battery voltageMotor runs at raw battery voltage All other systems on 48V or 24V busAll other systems on 48V or 24V bus Most sub systems electrically isolatedMost sub systems electrically isolated

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Wiring HarnessWiring Harness

One cable carries all connections One cable carries all connections required by most sub systemsrequired by most sub systems• LONWorks data networkLONWorks data network• 48V Power Supply48V Power Supply• 24V Power Supply24V Power Supply

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Electronic HardwareElectronic Hardware

Standard TypesStandard Types• Analogue I/O nodeAnalogue I/O node• Serial I/O nodeSerial I/O node• LTM 10 (Flash programmable) nodeLTM 10 (Flash programmable) node• RouterRouter• HPSN based nodeHPSN based node

SpecialsSpecials• Data logger (PC104 based)Data logger (PC104 based)

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Network Configuration - BindingNetwork Configuration - Binding

network output int nvo_1network input int nvi_2

network input int nvi_3network output int nvo_4

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Data LoggerData Logger

Event DrivenEvent Driven• Variables are recorded as they arriveVariables are recorded as they arrive

ScheduledScheduled• Variables are polled at regular intervalsVariables are polled at regular intervals• Output variables sent to telemetry Output variables sent to telemetry

systemssystems• Files opened, closed and renamed.Files opened, closed and renamed.

Diagnostic ModeDiagnostic Mode• Data sent to serial port.Data sent to serial port.

Ethernet Network File ServerEthernet Network File Server

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Background - Possible ChangesBackground - Possible Changes

Reduce wiring harness complexity by Reduce wiring harness complexity by standardising on 48Vstandardising on 48V

Add ethernet to harness.Add ethernet to harness.