| 摘要 |
PURPOSE:To obtain a contactless temperature measuring device with a simple structure and a low cost, by providing a plurality of equal heat absorbers opposite to each other and equidistantly form a subject of measurement, keeping different temperatures on the opposite surfaces of the heat absorbers and then measuring the temperatures of the opposite surfaces and their opposite surfaces. CONSTITUTION:For two temperature sensors 10 and 10' columnar heat absorbers 12 and 12' made of silicon nitride or ceramics are fitted to the tip parts of protective tubes 11 and 11'. Temperature detecting devices 14 and 14' such as thermocouples or the like are attached to the front and rear surfaces of the absorbers 12 and 12' each. A heater 18 is installed via a copper plate 16 at the back of the absorber 12 of a sensor 10, and the cooled air 22 is circulated inside the tube 11' of the other sensor 10'. These sensors 10 and 10' are set equidistantly and opposite to a subject 2 of measurement. Thus an arithmetic device 36 receives the temperature signals from the front and rear surfaces of absorbers 12 and 12' and then calculates the temperature of subject 2 to display it at a display part 38. In such way, a contactless temperature measuring device is obtained with a simple structure and a low cost. |
