Radiation thermometer
A first thermistor 8 and a second thermistor 9 are arranged forwardly and rearwardly of a thermopile sensor 5 . A thermopile chip 55 is arranged and interposed between the first thermistor 8 and an integrated thermistor 57 . A sensor cover is mounted in contact with front and side portions of a can portion 59 of a thermopile casing 56 . A temperature or a radiant quantity of infrared rays on the front portion of the can portion is estimated from a temperature change of the integrated thermistor per second.
1. A radiation thermometer, comprising:
an infrared-ray sensor for measuring a quantity of infrared rays irradiated from an object being measured;
sensor-temperature measuring means for measuring a temperature of the infrared-ray sensor;
temperature calculating means for calculating a temperature of the object being measured, on the basis of a quantity of infrared rays irradiated from the object being measured, and a temperature of the infrared-ray sensors;
an infrared-ray sensor receiving member for receiving the infrared-ray sensor which comprises an object-side portion facing a side of the object being measured, relative to the infrared-ray sensor, and
temperature-distribution measuring means for measuring a temperature distribution of the object-side portion,
wherein the temperature calculating means has the further functions of calculating a quantity of infrared rays irradiated from the object-side portion on the basis of the temperature distribution measured by the temperature-distribution measuring means and calculates a temperature of the object being measured, on the basis of a quantity of infrared rays irradiated from the object being measured, a temperature of the infrared-ray sensor and the calculated quantity of infrared rays irradiated from the object-side portion.
2. The radiation thermometer according to claim 1 , wherein the temperature-distribution measuring means measures a temperature distribution of the object-side portion on the basis of a changed portion of a temperature of the infrared ray sensor per unit time.
3. The radiation thermometer according to claim 1 or 2 , further comprising isothermal means for uniformizing a temperature distribution of the object-side portion.
4. The radiation thermometer according to claim 3 , wherein the isothermal means comprises a mount portion, to which the object-side portion is mounted.
5. The radiation thermometer according to claim 3 , wherein the object-side portion of the infrared-ray sensor receiving member comprises an infrared-ray transmitting portion for transmitting therethrough infrared rays irradiated from the object being measured, and the isothermal means is positioned outside a region where infrared rays irradiated pass through the infrared-ray transmitting portion to be incident upon the infrared-ray sensor.
6. The radiation thermometer according to claim 5 , wherein the isothermal means comprises a mount portion, to which the object-side portion is mounted.
7. The radiation thermometer according to claim 3 , wherein the isothermal means is formed from a substance of high thermal conductivity and contacts with the object-side portion to cover at least a part thereof.
8. The radiation thermometer according to claim 7 , wherein the isothermal means comprises a mount portion, to which the object-side portion is mounted.
9. The radiation thermometer according to claim 7 , wherein the object-side portion of the infrared-ray sensor receiving member comprises an infrared-ray transmitting portion for transmitting therethrough infrared rays irradiated from the object being measured, and the isothermal means is positioned outside a region where infrared rays irradiated pass through the infrared-ray transmitting portion to be incident upon the infrared-ray sensor.