Method of calibrating a radiation thermometer
First Claim
1. A method of calibrating a radiation thermometer including a radiation sensor that is characterized by a sensitivity (S) and an ambient temperature sensor, said method comprising:
- using a first radiation standard having a known temperature TS(1);
while the ambient temperature sensor is at a first ambient temperature TU, using the radiation thermometer to read the temperature of the first radiation standard;
while using the radiation thermometer to read the temperature of the first radiation standard, measuring a first output signal U(1) of the radiation sensor;
using a second radiation standard having a known temperature TS(2);
while the ambient temperature sensor is at said first ambient temperature TU, using the radiation thermometer to read the temperature of the second radiation standard;
while using the radiation thermometer to read the temperature of the second radiation standard, measuring a second output signal U(2) of the radiation sensor; and
calibrating the radiation sensor and the ambient temperature sensor by using TS(1), TS(2) and the values obtained for U(1) and U(2) and without using any value for TU that is derived from measuring an output of the ambient temperature sensor, wherein said step of calibrating involves calculating at least one of the first ambient temperature TU, and the sensitivity (S) of the radiation sensor.
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Abstract
A method of calibrating a radiation thermometer including a radiation sensor that is characterized by a sensitivity (S) and a temperature-responsive resistor that serves as an ambient temperature sensor, the temperature-responsive resistor having at a specified reference temperature a reference resistance (R0). The method includes the steps of using a first radiation standard having a known temperature TS(1); while the ambient temperature sensor is at a first ambient temperature TU(1), using the radiation thermometer to read the temperature of the first radiation standard; while using the radiation thermometer to read the temperature of the first radiation standard, measuring a first output signal U(1) of the radiation sensor; using a second radiation standard having a known temperature TS(2); while the ambient temperature sensor is at said first ambient temperature TU(1), using the radiation thermometer to read the temperature of the second radiation standard; while using the radiation thermometer to read the temperature of the second radiation standard, measuring a second output signal U(2) of the radiation sensor; and calibrating the radiation sensor and the ambient temperature sensor by using TS(1), TS(2) and the values obtained for U(1) and U(2) and without using any value for TU(1) that is derived from measuring an output of the ambient sensor, wherein the step of calibrating involves calculating at least one of the reference resistance (R0) of the ambient temperature sensor, the ambient temperature (Tu), and the sensitivity (S) of the radiation sensor.
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Citations
16 Claims
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1. A method of calibrating a radiation thermometer including a radiation sensor that is characterized by a sensitivity (S) and an ambient temperature sensor, said method comprising:
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using a first radiation standard having a known temperature TS(1);
while the ambient temperature sensor is at a first ambient temperature TU, using the radiation thermometer to read the temperature of the first radiation standard;
while using the radiation thermometer to read the temperature of the first radiation standard, measuring a first output signal U(1) of the radiation sensor;
using a second radiation standard having a known temperature TS(2);
while the ambient temperature sensor is at said first ambient temperature TU, using the radiation thermometer to read the temperature of the second radiation standard;
while using the radiation thermometer to read the temperature of the second radiation standard, measuring a second output signal U(2) of the radiation sensor; and
calibrating the radiation sensor and the ambient temperature sensor by using TS(1), TS(2) and the values obtained for U(1) and U(2) and without using any value for TU that is derived from measuring an output of the ambient temperature sensor, wherein said step of calibrating involves calculating at least one of the first ambient temperature TU, and the sensitivity (S) of the radiation sensor. - View Dependent Claims (2)
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3. A method of calibrating a radiation thermometer including a radiation sensor and a temperature-responsive resistor that serves as an ambient temperature sensor, wherein the temperature-responsive resistor has at a specified temperature a reference resistance R0 and a temperature dependence that is characterized by a linear temperature coefficient, said method comprising:
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using a first radiation standard having a known temperature TS(1);
while the ambient temperature sensor is at a first ambient temperature TU, using the radiation thermometer to read the temperature of the first radiation standard;
while using the radiation thermometer to read the temperature of the first radiation standard, measuring a first output signal U(1) of the radiation sensor;
using a second radiation standard having a known temperature TS(2);
while the ambient temperature sensor is at said first ambient temperature TU, using the radiation thermometer to read the temperature of the second radiation standard;
while using the radiation thermometer to read the temperature of the second radiation standard, measuring a second output signal U(2) of the radiation sensor;
measuring a resistance R(TU) of the ambient temperature sensor at said first ambient temperature TU;
using a third radiation standard having a known temperature TS(3);
while the ambient temperature sensor is at a second ambient temperature TU′
, using the radiation thermometer to read the temperature of the third radiation standard;
while using the radiation thermometer to read the temperature of the third radiation standard, measuring a third output signal U(3) of the radiation sensor;
using a fourth radiation standard having a known temperature TS(4);
while the ambient temperature sensor is at said second ambient temperature TU′
, using the radiation thermometer to read the temperature of the fourth radiation standard;
while using the radiation thermometer to read the temperature of the fourth radiation standard, measuring a fourth output signal U(4) of the radiation sensor;
measuring a resistance R(TU′
) of the ambient temperature sensor at said second ambient temperature TU′
; and
calibrating the ambient temperature sensor by using TS(1), TS(2), TS(3) and TS(4) and the values obtained for U(1), U(2), U(3) and U(4) and without using any values for TU and TU′
that are derived from measuring an output of the ambient temperature sensor, and wherein the step of calibrating involves calculating the first and second ambient temperatures TU and TU′ and
calculating the reference resistance R0 and the linear temperature coefficient of the temperature-responsive resistor by using the calculated first and second ambient temperatures TU and TU′
.- View Dependent Claims (4, 5)
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6. A method of calibrating a radiation thermometer including a radiation sensor and a temperature-responsive resistor that serves as an ambient temperature sensor, wherein the temperature-responsive resistor has at a specified reference temperature a reference resistance R0 and a temperature dependence that is characterized by a linear temperature coefficient and a quadratic temperature coefficient, said method comprising:
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using a first radiation standard having a known temperature TS(1);
while the ambient temperature sensor is at a first ambient temperature TU, using the radiation thermometer to read the temperature of the first radiation standard;
while using the radiation thermometer to read the temperature of the first radiation standard, measuring a first output signal U(1) of the radiation sensor;
using a second radiation standard having a known temperature TS(2);
while the ambient temperature sensor is at said first ambient temperature TU, using the radiation thermometer to read the temperature of the second radiation standard;
while using the radiation thermometer to read the temperature of the second radiation standard, measuring a second output signal U(2) of the radiation sensor;
measuring a resistance R(TU) of the ambient temperature sensor at said first ambient temperature TU;
using a third radiation standard having a known temperature TS(3);
while the ambient temperature sensor is at a second ambient temperature TU′
, using the radiation thermometer to read the temperature of the third radiation standard;
while using the radiation thermometer to read the temperature of the third radiation standard, measuring a third output signal U(3) of the radiation sensor;
using a fourth radiation standard having a known temperature TS(4);
while the ambient temperature sensor is at said second ambient temperature TU′
, using the radiation thermometer to read the temperature of the fourth radiation standard; and
while using the radiation thermometer to read the temperature of the fourth radiation standard, measuring a fourth output signal U(4) of the radiation sensor;
measuring a resistance R(TU′
) of the ambient temperature sensor at said second ambient temperature TU′
;
using a fifth radiation standard having a known temperature TS(5);
while the ambient temperature sensor is at a third ambient temperature TU″
, using the radiation thermometer to read the temperature of the fifth radiation standard;
while using the radiation thermometer to read the temperature of the fifth radiation standard, measuring a fifth output signal U(5) of the radiation sensor;
using a sixth radiation standard having a known temperature TS(6);
while the ambient temperature sensor is at said third ambient temperature TU″
, using the radiation thermometer to read the temperature of the sixth radiation standard;
while using the radiation thermometer to read the temperature of the sixth radiation standard, measuring a sixth output signal U(6) of the radiation sensor;
measuring a resistance R(TU″
) of the ambient temperature sensor at said third ambient temperature TU″
; and
calibrating the ambient temperature sensor by using TS(1), TS(2), TS(3), TS(4), TS(5) and TS(6) and the values obtained for U(1), U(2), U(3), U(4), U(5) and U(6) and without using any values for TU, TU′
, and TU″
that are derived from measuring an output of the ambient temperature sensor and wherein the step of calibrating involves calculating the first, second and third ambient temperatures, and calculating the reference resistance R0 and the linear temperature coefficient and the quadratic temperature coefficient of the temperature-responsive resistor by using the calculated first, second and third ambient temperatures TU, TU′
, and TU″
.- View Dependent Claims (7, 8, 9)
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10. A method of calibrating a radiation thermometer including a radiation sensor and an ambient temperature sensor, wherein the ambient temperature sensor outputs at a specified reference temperature a reference output value R0 and has a temperature dependence that is characterized by a linear temperature coefficient, said method comprising:
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using a first radiation standard having a known temperature TS(1);
while the ambient temperature sensor is at a first ambient temperature TU, using the radiation thermometer to read the temperature of the first radiation standard;
while using the radiation thermometer to read the temperature of the first radiation standard, measuring a first output signal U(1) of the radiation sensor;
using a second radiation standard having a known temperature TS(2);
while the ambient temperature sensor is at said first ambient temperature TU, using the radiation thermometer to read the temperature of the second radiation standard;
while using the radiation thermometer to read the temperature of the second radiation standard, measuring a second output signal U(2) of the radiation sensor;
measuring the output value R(TU) of the ambient temperature sensor at said first ambient temperature TU;
using a third radiation standard having a known temperature TS(3);
while the ambient temperature sensor is at a second ambient temperature TU′
, using the radiation thermometer to read the temperature of the third radiation standard;
while using the radiation thermometer to read the temperature of the third radiation standard, measuring a third output signal U(3) of the radiation sensor;
using a fourth radiation standard having a known temperature TS(4);
while the ambient temperature sensor is at said second ambient temperature TU′
, using the radiation thermometer to read the temperature of the fourth radiation standard;
while using the radiation thermometer to read the temperature of the fourth radiation standard, measuring a fourth output signal U(4) of the radiation sensor;
measuring the output value R(TU′
) of the ambient temperature sensor at said second ambient temperature TU′
; and
calibrating the ambient temperature sensor by using TS(1), TS(2), TS(3), TS(4) and the values obtained for U(1), U(2), U(3) and U(4) and without using any values for TU and TU′
that are derived from measuring an output of the ambient temperature sensor, and wherein the step of calibrating involves calculating the first and second ambient temperatures TU, TU′ and
calculating the reference output value R0 and the linear temperature coefficient of the ambient temperature sensor by using the calculated first and second ambient temperatures TU, TU′
.- View Dependent Claims (11, 12)
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13. A method of calibrating a radiation thermometer including a radiation sensor and an ambient temperature sensor, wherein the ambient temperature sensor outputs at a specified reference temperature a reference output value R0 and has a temperature dependence that is characterized by a linear temperature coefficient and a quadratic temperature coefficient, said method comprising:
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using a first radiation standard having a known temperature TS(1);
while the ambient temperature sensor is at a first ambient temperature TU, using the radiation thermometer to read the temperature of the first radiation standard;
while using the radiation thermometer to read the temperature of the first radiation standard, measuring a first output signal U(1) of the radiation sensor;
using a second radiation standard having a known temperature TS(2);
while the ambient temperature sensor is at said first ambient temperature TU, using the radiation thermometer to read the temperature of the second radiation standard;
while using the radiation thermometer to read the temperature of the second radiation standard, measuring a second output signal U(2) of the radiation sensor;
measuring the output value R(TU) of the ambient temperature sensor at said first ambient temperature TU;
using a third radiation standard having a known temperature TS(3);
while the ambient temperature sensor is at a second ambient temperature TU′
, using the radiation thermometer to read the temperature of the third radiation standard;
while using the radiation thermometer to read the temperature of the third radiation standard, measuring a third output signal U(3) of the radiation sensor;
using a fourth radiation standard having a known temperature TS(4);
while the ambient temperature sensor is at said second ambient temperature TU′
, using the radiation thermometer to read the temperature of the fourth radiation standard;
while using the radiation thermometer to read the temperature of the fourth radiation standard, measuring a fourth output signal U(4) of the radiation sensor;
measuring the output value R(TU′
) of the ambient temperature sensor at said second ambient temperature TU′
;
using a fifth radiation standard having a known temperature TS(5);
while the ambient temperature sensor is at a third ambient temperature TU″
, using the radiation thermometer to read the temperature of the fifth radiation standard;
while using the radiation thermometer to read the temperature of the fifth radiation standard, measuring a fifth output signal U(5) of the radiation sensor;
using a sixth radiation standard having a known temperature TS(6);
while the ambient temperature sensor is at said third ambient temperature TU″
, using the radiation thermometer to read the temperature of the sixth radiation standard;
while using the radiation thermometer to read the temperature of the sixth radiation standard, measuring a sixth output signal U(6) of the radiation sensor;
measuring the output value R(TU″
) of the ambient temperature sensor at said third ambient temperature TU″
; and
calibrating the ambient temperature sensor by using TS(1), TS(2), TS(3), TS(4), TS(5), TS(6) and the values obtained for U(1), U(2), U(3), U(4), U(5) and U(6) and without using any values for TU, TU′ and
TU″
that are derived from measuring an output of the ambient temperature sensor and wherein the step of calibrating involves calculating the first, second and third ambient temperatures TU, TU′
, TU″ and
calculating the reference output value R0 and the linear temperature coefficient and the quadratic temperature coefficient of the ambient temperature sensor by using the calculated first, second and third ambient temperatures TU, TU′
, TU″
.- View Dependent Claims (14, 15, 16)
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Specification