QUANTUM THEORY CORRECTION METHOD AND SYSTEM FOR IMPROVING ACCURACY OF TEMPERATURE MEASUREMENT OF RADIATION THERMOMETER

• US 20130148688A1
• Filed: 03/18/2011
• Published: 06/13/2013
• Est. Priority Date: 08/11/2010
• Status: Active Grant

• Current Assignee: Tianjin Yitong Electric Technology Development Co., Ltd.
• Original Assignee: Tianjin Yitong Electric Technology de
• Inventors: Cao, Bolin, Tan, Chengzhang, Cao, Rui, Liu, Chenggang
• Granted Patent: US 9,091,602 B2
• Time in Patent Office: Days
• US Class Current: 374/2
• CPC Class Codes: G01J 5/026 Control of working procedures of a pyrometer, other than calibration; Bandwidth calculation; Gain control
• CPC Class Codes: G01J 5/53 Reference sources, e.g. standard lamps; Black bodies
• CPC Class Codes: G01J 5/80 Calibration using comparison with reference sources G01J5/52
• CPC Class Codes: G01K 15/005 Calibration

Abstract

The present invention provides a quantum theory correction method for improving the accuracy of temperature measurement of radiation thermometer and a radiation thermometer system. The invention is related to the radiation thermometer in the field of instrumentation. The present invention acquires parameters reflecting energy level structure by adopting effective physical model to process data and using keyboard input or data transmission. The temperature of the object to be measured is finally acquired and displayed on the displayer. The quantum theory correction method and radiation thermometer system effectively overcome the difficulty that the value of radiance ε(λ·T) cannot be accurately measured in the event that radiance correction method is used to improve the accuracy of radiation thermometer. Thus, the accuracy of thermometer is improved significantly.

Claims

1. A quantum theory correction method for improving the accuracy of the radiation thermometer, which is characterized that the said method comprises the following procedures:

(1) Measure the standard temperature Ti of the object by using standard temperature measurement instrumentation;

measure the thermal radiation signal voltage Ui(Ti) of the object, where i=1, 2, 3, 4 . . . N and N is a positive integer, by using radiation thermometer system at status of calibration;

input the said standard temperature Ti and the said thermal radiation signal voltage Ui(Ti) into a PC or MCU with physical model outside or inside the radiation thermometer system for data processing to acquire parameters reflecting energy level structure;

the said physical model includes;

U(T)=A(e^B/T−

1)<sup>−

1</sup> is used in the case of radiation thermometer system with narrow working band;

After working band is selected suitably, the model is simplified as U(T)=A(e^B/T) if the working band is short wave; and

U(T)=AT+B if the working band is long wave;

the parameters A and B reflecting energy level structure are obtained by inputting data into the physical model and fitting it with least square method;

2. The said quantum theory correction method for improving the accuracy of radiation thermometer according to claim 1, wherein the said radiation thermometer system functions to determine the value of parameters reflecting the energy level structure of the object to be measured and to determine the temperature value of the object.

3. The said quantum theory correction method for improving the accuracy of radiation thermometer according to claim 1, wherein the obtained said parameters reflecting energy level structure are input into the radiation thermometer system to calibrate the radiation thermometer in Step (2), including:

input the acquired parameters A and B reflecting energy level structure into the radiation thermometer system to calibrate the radiation thermometer with narrow working band;

input the acquired parameters A, B, C and D or parameters A and B reflecting energy level structure into the radiation thermometer system to calibrate the radiation thermometer with broad working band;

input the acquired parameters A and B reflecting energy level structure into radiation thermometer system to calibrate the radiation thermometer with infinite working band.

4. The said quantum theory correction method for improving the accuracy of radiation thermometer according to claim 1 or claim 3, wherein the said acquired parameters reflecting energy level structure are input into the said radiation thermometer system by keyboard input or data transmission.

5. The said quantum theory correction method for improving the accuracy of radiation thermometer according to claim 1, wherein the temperature value of the object to be measured is obtained by calculation of PC or MCU inside the said radiation thermometer system according to physical model in Step (4), particularly that:

the temperature value of the object to be measured is obtained by calculation of PC or MCU inside the said radiation thermometer system according to narrow-band physical model, broad-band physical model or infinite-band physical model.

6. The said quantum theory correction method for improving the accuracy of radiation thermometer according to claim 1, wherein the said standard instrumentation for temperature measurement is standard platinum resistance thermometer, standard thermocouple thermometer or standard mercury thermometer.

7. A quantum theory correction radiation thermometer system for improving the accuracy of radiation thermometer, wherein the said radiation thermometer system comprises:

measurement module, which is used for measuring the standard temperature Ti by standard instrumentation of temperature measurement;

the thermal radiation signal voltage Ui(Ti) of the object, where i=1, 2, 3, 4 . . . N (N is a positive integer), is measured by the radiation thermometer system at calibration status. The said standard temperature Ti and the said thermal radiation signal voltage Ui(Ti) are input into PC or MCU inside or outside the radiation thermometer system with physical model for data processing;

the said physical model includes;

U(T)=A(e^B/T−

1)<sup>−

1</sup> is used in the case of radiation thermometer system with narrow working band;

after working band is selected properly, the above model is simplified as U(T)=A(e^B/T) if the working band is short wave; and

as U(T)=AT+B if the working band is long wave. Parameters A and B reflecting energy level structure are obtained by inputting data into the physical model and processing data with least square method; and

8. The said quantum theory correction radiation thermometer system for improving the accuracy of radiation thermometer according to claim 7, wherein the said radiation thermometer system is capable of determining the value of parameters reflecting energy level structure of the object and determining the temperature value of the object to be measured.

9. The said quantum theory correction radiation thermometer system for improving the accuracy of radiation thermometer according to claim 7, wherein the said calibration module comprises:

primary calibration sub module, used for inputting the acquired parameters A and B reflecting energy level structure into PC or MCU inside the said radiation thermometer system to calibrate the radiation thermometer system with narrow working band;

secondary calibration sub module, used for inputting the acquired parameters A, B, C and D, or parameters A and B reflecting energy level structure into PC or MCU inside the said radiation thermometer system to calibrate radiation thermometer system with broad working band;

third calibration sub module, used for inputting the acquired parameters A and B reflecting energy level structure into PC or MCU inside the said radiation thermometer system to calibrate radiation thermometer system with infinite working band.

10. The said quantum theory correction radiation thermometer system for improving the accuracy of radiation thermometer according to claim 7 or claim 9, wherein the said calibration module also includes:

keyboard input or data transmission module, used for inputting the said acquired parameters reflecting energy level structure into PC or MCU inside the said radiation thermometer system

11. The said quantum theory correction radiation thermometer system for improving the accuracy of radiation thermometer according to claim 7, wherein the temperature value of the object to be measured is obtained by calculation of PC or MCU inside the said radiation thermometer system according to physical model, in particular that:

the temperature of the object to be measured is obtained by calculation on the basis of narrow-band physical model or broadband physical model or infinite-band physical model.

12. The said quantum theory correction radiation thermometer system for improving the accuracy of radiation thermometer according to claim 7, wherein the said standard instrumentation for temperature measurement is standard platinum resistance thermometer, standard thermocouple thermometer or standard mercury thermometer.