非接触連接温度計

抄録

A non-contacting graft thermometer consisting of two sensors is described. Each sensor of the graft thermometer is composed of a thin copper plate having a trough at the central portion, two thermocouples and a heater. The four thermocouples of the two sensors are thermally grafted on a resistance thermometer.
An equation for determining the temperature of the surface to be measured is derived theoretically from the temperatures of the four points of the two sensors. By using an operational amplifier, an output voltage proportional to the surface temperature is obtained.
Experiments are carried out to measure the temperature of the surface of a heated cylinder. The surface temperatures measured by the non-contacting graft thermometer are compared with those obtained directly by a thermocouple.
Data are presented of the relation between the surface temperature of the rotating cylinder and the linear velocity of the surface, with consideration given to the effect of convection.