Radiation temperature measuring device

A method to measure a surface temperature of an object without contact using an infrared sensor, the method comprising:

• measuring an output of the infrared sensor to detect a wavelength including an absorption band by atmosphere existing between the infrared sensor and the object;
• calculating an absorption rate by the atmosphere at a wavelength of the absorption band when the surface temperature of the object is measured on the basis of a H2O absorption coefficient of each wavelength in the absorption band;
• storing a preset conversion equation for converting the output of the infrared sensor into the surface temperature of the object, which includes a coefficient indicating a characteristic of the infrared sensor, and a pre-detected value of the coefficient indicating the characteristic of the infrared sensor;
• calculating the surface temperature of the object from the output of the infrared sensor, the calculated absorption rate, and the conversion equation including the stored value of the coefficient indicating the characteristic of the infrared sensor;
• and
• calculating in advance the absorption rate by the atmosphere at the wavelength of the absorption band when the value of the stored coefficient indicating the characteristic of the infrared sensor is detected on the basis of a H2O absorption coefficient of each wavelength in the absorption band and storing the calculation result,
• correcting the surface temperature of the object using the stored preset conversion equation corrected by the stored absorption rate.

A method to measure a surface temperature of an object without contact using an infrared sensor, the method comprising:

• measuring an output of the infrared sensor to detect a wavelength including an absorption band by atmosphere existing between the infrared sensor and the object;
• calculating an absorption rate by the atmosphere at a wavelength of the absorption band when the surface temperature of the object is measured on the basis of a H2O absorption coefficient of each wavelength in the absorption band;
• storing preset conversion information for converting the output of the infrared sensor into the surface temperature of the object;
• calculating in advance the absorption rate by the atmosphere at the wavelength of the absorption band when the conversion information is set on the basis of a H2O absorption coefficient of each wavelength in the absorption band and storing the calculation result;
• and
• correcting the surface temperature of the object from the output of the infrared sensor, the calculated absorption rate, the stored absorption rate, and the stored preset conversion information.