StarFL - A new Metadata Language for Sensor Descriptions

transcript

Christian Malewski

StarFL – A new Metadata Language for Sensor Descriptions

Why do we need yet another metadata language for sensor descriptions?

Christian Malewski, Ingo Simonis, Andrew Terhorst, Arne Bröring

Christian Malewski

Motivation

2 StarFL – A new Metadata Language for Sensor Descriptions

• Increasing number of sensor resources in www

• Discovery / Selection / Tasking

• Available sensor description models:

SensorML

Christian Malewski

Status Quo

• SensorML (OGC)

• Widely used in SWE community

• Abstract / “soft-typed“ flexible, but less interoperable

• Snippet management?

• Profiles required

• Semantic Sensor Network Ontology (W3C inc. group)

• Clear definition of concepts

• Focus: Alignment of a sensor in a domain

• “close match“ relationships to SWE

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A Sensor

observes Wind_Direction.

observes Rainfall.

observes Air_Temperature.

observes Barometric_Pressure.

observes Relative_Humidity.

observes …

Christian Malewski

A Sensor

observes Wind_Direction.

observes Rainfall.

observes Air_Temperature.

observes Barometric_Pressure.

observes Relative_Humidity.

observes …

Procedures Characteristic

Static

Sensor Deployment

Dynamic

Christian Malewski

“Starfish Fungus Language” (StarFL)

• Modularized ( 2 Core Modules: Static + Dynamic )

• Reuses and reinterprets concepts of

SSNO and SensorML

• Aligns to semantics and interfaces of O&M

• Restrictive / “hard typed” (Pareto principle)

• Extensions

• UML Model XML Schema

Hollow World and Fullmoon

Christian Malewski

Core (UML)

StaticModule::SensingProcedure

- measurementCapabilities

- observedProperty

StaticModule::SensorCharacteristic

- physicalProperties

- operationalProperties

DynamicModule::Sensing

- active

- featureOfInterest

DynamicModule::Sensor

- serialNumber

senses [1..n]

provides [1..n]

characteristics procedure

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Sensor Description

1. Find ‘static description’ for particular sensor model…

if available on www: Go to step 2.

else create static sensor description.

2. Create ‘dynamic description‘

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Create static description…

<sfl:SensorCharacteristic xmlns:xlink… xmlns:om… xmlns:swe…

gml:id="SensorCharacteristic_Sensirion_SHT75">

<sfl:manufacturer>…Sensirion AG…</sfl:manufacturer>

<sfl:model>SHT75</sfl:model>

<sfl:provides>

<sfl:SensingProcedure gml:id="relativeHumidity">

…</sfl:SensingProcedure></sfl:provides>

<sfl:SensingProcedure gml:id=„temperature">

…</sfl:SensingProcedure></sfl:provides>

…</sfl:SensorCharacteristic>

SensorCharacteristic

SensingProcedure [1..n]

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Create dynamic description

1. Describe sensor instance and link to static description

2. Describe Platform

3. Link platform and mounted sensors via SensorDeployment

4. Calibration

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Sensor and Sensing

<sfl:Sensor gml:id="SHT75_39">

<sfl:serialNumber>39</sfl:serialNumber>

<sfl:characteristics xlink:href="SChar_SHT75.xml"/>

<sfl:senses>

<sfl:Sensing gml:id="tempSHT75_39">

<sfl:sensingProcedure xlink:href=„SChar_SHT75.xml#temp"/>

<sfl:unitOfMeasure uom="degCel"/>

<sfl:active>true…

<sfl:observedFoI>…

</sfl:Sensing>

</sfl:Sensor>

Christian Malewski

4. Calibration

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Dynamic Module (part)

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4. Calibration

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SensorDeployment

SHT75:23002

SHT75:23003

WXT520:10002

WXT520:10003

SensorDeployment: t1 – t2

ifgicopter :Platform

BenLomond :Platform

SensorDeployment: t3 – t4

SensorDeployment t1 - ∞

SensorDeployment

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1. Describe sensor instance and link to static description:

4. Calibration

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Future steps

• Build RESTful Services to manage

Static and Dynamic Sensor Descriptions

• Integration to Sensorbus

(mapping mechanisms to SensorML

and SSNO)

• Apply & test in several projects

(water, climate, provenance,

re-calibration, re-deployment,

sensor plug ‘n’ play)

• Open issues

Christian Malewski

Thank you

christian.malewski@uni-muenster.de

Christian Malewski

Sensing Chain / Sensor Tree

StarFL - A new Metadata Language for Sensor Descriptions

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