"Using Scilab in the Radiation Thermometry Laboratory of Inmetro"
By Ricardo Sohn, Instituto Nacional de Metrologia, Qualidade e Tecnologia - Inmetro for ScilabTEC 2015
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Using Scilab for Radiation Thermometry
1. Using Scilab in the
Radiation Thermometry Laboratory
of Inmetro (Lapir)
Mario A. P. Neto (maneto@inmetro.gov.br)
Ricardo S. T. M. Sohn (rsmoretz@inmetro.gov.br)
3. International System of Units (SI)
1967: The name kelvin, symbol K, was adopted instead of
“degree Kelvin”, symbol °K, and defined as “the
fraction 1/273,16 of the thermodynamic temperature
of the triple point of water”.
1954: The thermodynamic temperature scale was defined
choosing the triple point of water as the fundamental
fixed point, and assigning to it the temperature 273,16
degrees Kelvin, exactly.
1960: The name Système International d’Unités, with the
abbreviation SI, was given to the system of units.
4. Examples of equations for primary thermometry
equation of state for
an ideal gas
Stefan-Boltzmann
equation
10. Scilab - GUIs
With This window we can:
- convert thermocouple emf to
Temperature and vice-versa;
- plot thermocouple curves
11. Scilab - GUIs
Standardized thermocouples:
functions and coefficients
into a new Scilab library,
thermo
Calibrated TC of Lab:
functions from thermo and
coefficients into a worksheet
16. Scilab - GUIs
With this window we can evaluate
the temperature from:
- a photocurrent signal of the
thermometer detector;
- responsivity spectral data
- reference signal and reference
temperature etc.
29. Data Acquisition
Rad. Therm.
Thermocouple
Rad. Therm.
DMM
GPIB ↔ USB
converter
Analog
output
Dig.
output
RS-232
USB
●
Hardware from NI
●
GPIB toolbox by
Tibault Reveyrand
●
Serial Comm. toolbox
●
Modbus toobox