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Transcript of TECO-2006 - Geneva1 Integrated Quality Control Functions on AWS-Level Gealog SG Station Manager...
TECO-2006 - Geneva 1
Integrated Quality Control Functions on AWS-Level
Gealog SG Station Manager
Gerhard Pevny, Logotronic GmbH, Austria
Dietmar Pindeus, Logotronic GmbH, Austria
TECO-2006 - Geneva 2
Integrated Quality Control IQCStarting Point - User Community
There are still only few, not detailed recommendations regarding quality control procedures
High demand for concrete recommendations for QMon AWS level. (QM-terminology, QC-strategies on AWS level, QC algorithms, required metadata, ...)
CIMO Guide (WMO No. 8) contains extensive technical recommendations how to measure meteorological parameters
TECO-2006 - Geneva 3
New hardware and software platform for AWS: Gealog SG Station Manager
Using most advanced technology in hardware and firmware
Based on this platform implementation of an extensive automatic quality control system which could be an example for future standardization work
Integrated Quality Control IQCStarting Point - Logotronic
TECO-2006 - Geneva 4
Integrated Quality Control IQCTechnical Background
Nearly PC-processing power at AWS-level Implementation of more complex quality control procedures
Use of modern data transfer medias (GPRS, Meteosat HDR, ...) Possibility to transfer higher quantities of data and therefore integration of additional quality information.
TECO-2006 - Geneva 5
SensorStation
ManagerCommunication
NetworkNetworkCentre
Where should Quality Control be applied? Quality control on all levels of the measuring network
1. UserInterventions
3. WorkingEnvironment
4. Hardware Plausibility
5. SystemTime
6. Data Transfer Channels to Network
Centre
2. Metadata
TECO-2006 - Geneva 6
Basic QC Philosophy
Basic philosophy for the definition of the quality control procedures:
“Detection of an error in advance before the error shows influence on the measured time series”
TECO-2006 - Geneva 7
QC on User InterventionsUser Identification
TECO-2006 - Geneva 8
QC on User Interventions - Log-File
One entry for user-login and logout and each activity- which changes the AWS´s status (i.g. changing of parameters, ...)
Log-File entry contains:Date, time, user-id, short description of activity
Readout of Log-File together with stored measuring data
TECO-2006 - Geneva 9
Metadata Stored on AWS Level
TECO-2006 - Geneva 10
Metadata on AWS Level
TECO-2006 - Geneva 11
Monitoring of the working Environment and internal Parameters of the AWS Gealog SG offers a set of „internal measuring
channels“
Station battery voltage and temperature Voltage of the buffer battery used for the internal
real -time clock Internal temperature External supply voltage (mains or solar) Door-open contact
TECO-2006 - Geneva 12
Gealog Measuring Interface
Gealog Measuring Interface
Sensor1 Sensor2
Broken WiresLoose Wires
Standardized Gealog RS485-Fieldbus
IntelligentSensor1
Hardware related QC - The Galog Measuring Interface Concept
ExternalCommunication
Lines
Fan,Heater
SensorStatus and Protocol Check
Gealog Measuring Interface
TECO-2006 - Geneva 13
Plausibility Tests - standard Tests
TECO-2006 - Geneva 15
Additional Plausibility Test
Use of mathematical formulas to compute specific
quality criterias.
I.g.: Formula for monitoring of a sensor heater:
(Value(C1)<3)&(Value(C2)<2)
C1 Air temperature
C2 Heater current
TECO-2006 - Geneva 16
Redundant Sensors
TECO-2006 - Geneva 17
Testing the System Time
Gealog SG offers the synchronization of the real-time clock from the network centre, from GPS or from the Web
At the synchronization the time difference between old and new setting of the clock is computed and checked. If there is a too high time-shift a time-error is detected. Measuring values, influenced by the clock synchronization are marked.
TECO-2006 - Geneva 18
Recording of a Quality Tag The information-set for each data item is now: Time stamp - Measuring value - Quality Tag
TECO-2006 - Geneva 19
Quality Tag
Actually defined quality tag values:
Identifier Description
A No errors detected
P Plausibility error detected
C No measuring value existing, fatal error
D free
W Maintenance
Z Time error detected
K Manually inputted check value
TECO-2006 - Geneva 20
Support of manual Quality Control
Integrated graphic display with marking of values with Quality Tag below "A" in the graphic output
Direct connection of a video camera- Recording of images- Visual inspection of the AWS from the office desk
TECO-2006 - Geneva 21
Conclusion Target: Automatic quality management system for the
whole measuring network based on ISO9001 recommendations
Consideration for future revisions of the CIMO Guide: - Integration of Quality Tags into the standard data sets- Definition of a Quality Tag system- Recommendations of sensor specific or measuring parameter specific quality checks and procedures on AWS level- Recommendations for AWS metadata including "on-line metadata" like actual images of the station
TECO-2006 - Geneva 22
Integrated Quality Control Functions on AWS-Level
Gealog SG Station Manager
Thank you!
Please send comments [email protected]