BEZERRA, M. B. M.; BEZERRA, Marianne Bianca de Melo.
Resumo:
Thermistors are sensors which vary their resistance with an increase or decrease temperature
range, they are classified as PTC or NTC. In this work has been proposed the
implementation of an electronic instrumentation platform to static characterization of
thermistors. The developed platform allows to perform tests to obtain physical characteristics
of thermistors. For this, the NI DAQ USB-6212 has been used to perform data
acquisition in addiction to two actuator circuits were implemented, they are responsible for
the temperature dynamic during the test execution. The actuators were: power resistance
10
/50W, it is used as stove to heat the sensor system (PTC or NTC and LM35) and
a cooler to cool down this one. To facilitate the testing and verification of the measured
data in real time, two graphical interfaces were implemented using the LabVIEW. With
these, have been able to determine operating coefficients and the thermal conductance of
the sensors.
