Design of a temperature transmitter with contactless power and data transmission

In this paper, a multi-channel temperature transmitter is designed, aiming at temperature measurement of rotors, which can also be extended to other parameter measurements of rotating objets. The device receives power with contactless power transfer technology. And the measured temperature data is transferred through wireless data communication. The problem of electromagnetic interference between wireless data transmission and contactless power transfer is solved. The temperature transmitter uses high precision PT100 sensors to achieve temperature measuring accuracy, and converts temperature signals to standard 4–20mA current output.