| 摘要 |
PURPOSE:To enable measurement handily and in a wide range, by determining the ratio and difference between contribution rates of radiation sources which are difined as the ratio of difference between detection values of a scan type radiation thermometer as given when two radiation energies are incident on the thermometer from the radiation sources and when none is. CONSTITUTION:A scan type radiation thermometer 2 scans over an object 1 to be measured and feeds a output signal to an arithmetic means 6 corresponding to measuring positions. Here, output signals of radiation sources 31 and 32 when radiation thereof is reflected from the object 1 being measured are represented by E1 and E2 and those below them E0. Output signals of a temperature detector 5 which detects temperature signals Tr of the radiation sources 31 and 32 and a temperature signal Ta of a background radiation plate 4 are also fed to the arithmetic means 6. Then, the arithmetic means 6 determines the ratio of contribution rates of the radiation sources from the signals E0 and E1 and E2 to match a specified formula and further the emissivity epsilon by computation. The emissivity epsilon is used to determine the temperature T of the object 1 being measured by computation. In this manner, the emissivity epsilonof the object 1 being measured is determined from the contribution rates of the radiation sources 31 and 32 to obtain temperatures T at points. |
