Design and Realization of Temperature Transmitter Based on Pt100 Platinum Thermal Resistance
Wei Wang · Modern Electronics Technique · 2010
A three-wire Pt100 temperature sensor is designed and analysed aiming at temperature measurement of air compressor′s special inverter system.Using resistance and temperature function of Pt100 platinum thermal resistance,converting the temperature signal into a voltage signal,amplifying voltage signal through two-stage amplifier circuit and then converting the voltage signal into standard current signal output.In the A / D acquisition,using precise current and voltage conversion chips,converting current signal into standard voltage signal.The practice proves that the sensor has high stability and flexibility,is easy to achieve and has good performance,low cost.