Calculation device and method therefor

A calculation device, wherein thermo-couple input temperature is calculated from thermo-couple output electrical potential and surrounding temperature, comprising:

• a memory for storing a plurality of values of said thermo-couple input temperature being calculated using a plurality of values of said thermo-couple output electrical potential and a plurality of values of said surrounding temperature;
• and
• a calculation unit for inputting a predetermined value of said thermo-couple output electrical potential and a predetermined value of said surrounding temperature, reading out from the memory a plurality of values of said stored thermo-couple output electrical potential corresponding to a predetermined value of said inputted thermo-couple output electrical potential, reading out from the memory a plurality of values of said stored surrounding temperature corresponding to a predetermined value of said inputted surrounding temperature, reading out from the memory a plurality of values of said stored thermo-couple input temperature selected from a plurality of values of said read out thermo-couple output electrical potential and a plurality of values of said read out surrounding temperature, and calculating thermo-couple input temperature corresponding to a predetermined value of said inputted surrounding temperature and a predetermined value of said inputted thermo-couple output electrical potential using interpolation.

A calculation method wherein thermo-couple input temperature is calculated using thermo-couple output electrical potential and surrounding temperature, comprising the steps of:

• storing in a memory a plurality of values of said thermo-couple input temperature calculated using a plurality of values of said thermo-couple output electrical potential and a plurality of values of said surrounding temperature;
• inputting a predetermined value of said thermo-couple output electrical potential and a predetermined value of said surrounding temperature;
• comparing a predetermined value of said inputted thermo-couple output electrical potential with said stored thermo-couple output electrical potential;
• reading out from the memory said stored thermo-couple output electrical potential, which is smaller than a predetermined value of said inputted thermo-couple output electrical potential, as a first thermo-couple output electrical potential;
• reading out from the memory said stored thermo-couple output electrical potential, which is larger than a predetermined value of said inputted thermo-couple output electrical potential, as a second thermo-couple output electrical potential;
• compares a predetermined value of said inputted surrounding temperature with said stored surrounding temperature;
• reading out from the memory said stored surrounding temperature, which is smaller than a predetermined value of said inputted surrounding temperature, as a first surrounding temperature;
• reading out from the memory said stored surrounding temperature, which is larger than a predetermined value of said inputted surrounding temperature, as a second surrounding temperature;
• reading out from the memory said stored thermo-couple input temperature, corresponding to said first thermo-couple output electrical potential, said first surrounding temperature, and said second surrounding temperature, as first thermo-couple input temperature and a second thermo-couple input temperature;
• reading out from the memory said stored thermo-couple input temperature, corresponding to said first thermo-couple output electrical potential, said first surrounding temperature, and said second surrounding temperature, as third thermo-couple input temperature and fourth thermo-couple input temperature;
• and
• calculating thermo-couple input temperature, corresponding to a predetermined value of said inputted surrounding temperature and a predetermined value of said inputted thermo-couple output electrical potential by an interpolation, using a predetermined value of said inputted thermo-couple output electrical potential, a predetermined value of said surrounding temperature, said read out first and second thermo-couple output electrical potential, said read out first and second surrounding temperature, and said read out first, second, third, and fourth thermo-couple input temperature.