Design and verification of a non-invasive oil temperature measurement instrument

In this paper, a non-invasive oil temperature measurement instrument, together with the oil temperature calculation model based on the pipe surface and ambient temperatures, is presented. In order to validate the model, a verification device was developed which can measure the oil, pipe surface and ambient temperatures simultaneously. A series of model verification and optimization tests under different working conditions were carried out on the device. It can be concluded from the experiment results that the measurement instrument based on the optimized calculation model can perform non-invasive oil temperature measurement accurately.