industrial electronic institute in warsaw welding department warsaw university of technology...
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Industrial Electronic Institute in Warsaw
Welding Department Warsaw University of Technology
Institute of Ecological Electric Thermal Engineering Warsaw Poland
in co-operation with:
Computer Engineering Department
( Katedra Informatyki Stosowanej )
TECHNICAL UNIVERSITY OF LODZ
Al. Politechniki 11, 90-924 Lodz, Poland
Computerised System for
High Temperature Measurements
of Surface Properties
Computer Engineering Department
( Katedra Informatyki Stosowanej )
TECHNICAL UNIVERSITY OF LODZ
Al. Politechniki 11, 90-924 Lodz, Poland
Important surface properties:
of liquid and solid in contact are measured by this system.
andsurface tension wetting angle
Measuring conditions:
wide range of temperatures: up to
different atmospheres
1800oC1800oC1800oC1800oC1800oC1800oC1800oC
PROCESSINGALGORITHMS
IMAGEADC
PHYSICALPARAMETERS
DETERMINATION
TEMPERATUREMEASURMENT
TEMPERATURECONTROLLER
OPTICALFILTER
CHANGER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
THERMOCOUPLE
Block diagram of the system
Vision unit
Vision unit view-finder
subsystem for the optical infrared
filter changer
lens
CCD camera
subsystem for the precise setting
of the CCD camera
PROCESSINGALGORITHMS
IMAGEADC
PHYSICALPARAMETERS
DETERMINATION
TEMPERATUREMEASURMENT
TEMPERATURECONTROLLER
OPTICALFILTER
CHANGER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
THERMOCOUPLE
Block diagram of the system
Vision unit
PROCESSINGALGORITHMS
IMAGEADC
PHYSICALPARAMETERS
DETERMINATION
OPTICALFILTER
CHANGER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
THERMOCOUPLE
CONTROLLERTEMPERATURETEMPERATURE
MEASURMENT
Specimen feeding device
Block diagram of the system
PROCESSINGALGORITHMS
IMAGEADC
PHYSICALPARAMETERS
DETERMINATION
TEMPERATUREMEASURMENT
TEMPERATURECONTROLLER
OPTICALFILTER
CHANGER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
THERMOCOUPLE
Melting process of palladium at a temperature of 1550 0C
Block diagram of the system
OPTICALFILTER
CHANGER
PROCESSINGALGORITHMS
IMAGEADC
PHYSICALPARAMETERS
DETERMINATION
TEMPERATUREMEASURMENT
TEMPERATURECONTROLLER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
THERMOCOUPLE
Block diagram of the system
•Original image•Histogram •Thresholding•Filtration•Segmentation•Specimen localisation•Measurement of geometricalproperties
Original image
OPTICALFILTER
CHANGER
ADCPHYSICAL
PARAMETERSDETERMINATION
TEMPERATUREMEASURMENT
TEMPERATURECONTROLLER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
THERMOCOUPLE
Block diagram of the system
PROCESSINGALGORITHMS
IMAGE
•Original image•Histogram •Thresholding•Filtration•Segmentation•Specimen localisation•Measurement of geometricalproperties
Histogram
0
2 00 0 0
4 00 0 0
6 00 0 0
8 00 0 0
10 00 0 0
12 00 0 0
0 32 6 4 96 12 8 1 6 0 1 92 2 2 4
Nu
mb
er o
f p
ixel
s
Quantizationlevel
background specimentreshhold
value
ADCPHYSICAL
PARAMETERSDETERMINATION
TEMPERATUREMEASURMENT
TEMPERATURECONTROLLER
OPTICALFILTER
CHANGER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
THERMOCOUPLE
•Original image•Histogram •Thresholding•Filtration•Segmentation•Specimen localisation•Measurement of geometricalproperties
Thresholding
Block diagram of the system
PROCESSINGALGORITHMS
IMAGE
ADCPHYSICAL
PARAMETERSDETERMINATION
TEMPERATUREMEASURMENT
TEMPERATURECONTROLLER
OPTICALFILTER
CHANGER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
THERMOCOUPLE
•Original image•Histogram •Thresholding•Filtration•Segmentation•Specimen localisation•Measurement of geometricalproperties
Filtration
Block diagram of the system
PROCESSINGALGORITHMS
IMAGE
ADCPHYSICAL
PARAMETERSDETERMINATION
TEMPERATUREMEASURMENT
TEMPERATURECONTROLLER
OPTICALFILTER
CHANGER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
THERMOCOUPLE
•Original image•Histogram •Thresholding•Filtration•Segmentation•Specimen localisation•Measurement of geometricalproperties
Segmentation
Block diagram of the system
PROCESSINGALGORITHMS
IMAGE
ADCPHYSICAL
PARAMETERSDETERMINATION
TEMPERATUREMEASURMENT
TEMPERATURECONTROLLER
OPTICALFILTER
CHANGER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
THERMOCOUPLE
•Original image•Histogram •Thresholding•Filtration•Segmentation•Specimen localisation•Measurement of geometricalproperties
Specimen localisation
Block diagram of the system
PROCESSINGALGORITHMS
IMAGE
ADCPHYSICAL
PARAMETERSDETERMINATION
TEMPERATUREMEASURMENT
TEMPERATURECONTROLLER
OPTICALFILTER
CHANGER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
THERMOCOUPLE
•Original image•Histogram •Thresholding•Filtration•Segmentation•Specimen localisation•Measurement of geometricalpropertiespropertiesMeasurement of geometrical
Block diagram of the system
PROCESSINGALGORITHMS
IMAGE
1
2
h
y
45o
x
PROCESSINGALGORITHMS
IMAGEADC
PHYSICALPARAMETERS
DETERMINATION
TEMPERATUREMEASURMENT
TEMPERATURECONTROLLER
OPTICALFILTER
CHANGER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
THERMOCOUPLE
Block diagram of the system
•Geometrical parameters of the specimen•Surface tension calculation on the basis of Dorsey’s and Porter’s equations•Wetting angle calculation
1
2
h
y
45o
x
PROCESSINGALGORITHMS
IMAGEADC
PHYSICALPARAMETERS
DETERMINATION
TEMPERATUREMEASURMENT
TEMPERATURECONTROLLER
OPTICALFILTER
CHANGER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
Block diagram of the system
•Geometrical parameters of the specimen•Surface tension calculation on the basis of Dorsey’s and Porter’s equations•Wetting angle calculation
Sur
face
tens
ion
[mN
/m]
90 0
93 0
96 0
99 0
10 50
10 20
95 0 97 0 99 0 10 10 10 30 10 50 10 70
Tem p era tu re [ C ]o
A rg e n tu m
PROCESSINGALGORITHMS
IMAGEADC
PHYSICALPARAMETERS
DETERMINATION
TEMPERATUREMEASURMENT
TEMPERATURECONTROLLER
OPTICALFILTER
CHANGER
PC COMPUTER
SPECIMENINFRARED
FILTERS SET
CCD CAMERA
HEATINGELEMENTS
FURNACE
THERMOCOUPLE
Block diagram of the system
•Geometrical parameters of the specimen•Surface tension calculation on the basis of Dorsey’s and Porter’s equations•Wetting angle calculation
Wet
ing
angl
e
90
95
10 0
10 5
11 0
11 5
12 0
95 0 97 0 99 0 10 10 10 30 10 50 10 70
Tem p era tu re [ C ]o
A rg e n tu m
INDUSTRIAL APPLICATIONS: metallurgy
foundry
surface engineering welding
glass-making industry manufacturing of composite materials
production of tiles, varnishes and high-temperature paints, glasses and glazes
The results obtained are far more accurate than those obtained by means of the currently applied,
extremely time consuming non-automatic methods and the operator’s subjective evaluation. The essential characteristic of the results
obtained on the system is their repeatability.