TEMPERATURE MEASURING SYSTEM AND A SENSOR UNIT OF SUCH A TEMPERATURE MEASURING SYSTEM

摘要

The invention relates to a sensor unit and a temperature measuring system that includes the sensor unit for the contactless determination of the object temperature (Tv) of at least a part of an object. The sensor unit is placed near the object and includes a first and second plate. A temperature-sensitive sensor is disposed on each plate to produce first and second sensor signals which represent the temperature of the first and second plates, respectively. The system also includes a control unit which processes the first and second sensor signals in combination for determining the object temperature (Tv). Preferably, the control unit employs a Kalman filter. Also, the temperature measuring system is applied to an image reproduction machine to determine the temperature of a roller or belt.