Pyrometer

• US 20040022297A1
• Filed: 06/04/2003
• Published: 02/05/2004
• Est. Priority Date: 06/13/2000
• Status: Active Grant

• Current Assignee: Omron Healthcare Company Limited (Omron Corporation)
• Original Assignee: Omron Healthcare Company Limited (Omron Corporation)
• Inventors: Ogura, Toshihiko, Tabata, Hiroyuki, Tabata, Makoto, Sato, Tatsuya, Onishi, Yoshihide, Sato, Taiga
• Granted Patent: US 7,036,978 B2
• Time in Patent Office: Days
• US Class Current: 374/120
• CPC Class Codes: A61B 5/01 Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue clinical contact thermometers G01K13/20
• CPC Class Codes: G01J 5/02 Constructional details
• CPC Class Codes: G01J 5/021 Probe covers for thermometers, e.g. tympanic thermometers; Containers for probe covers; Disposable probes
• CPC Class Codes: G01J 5/025 Interfacing a pyrometer to an external device or network; User interface
• CPC Class Codes: G01J 5/026 Control of working procedures of a pyrometer, other than calibration; Bandwidth calculation; Gain control
• CPC Class Codes: G01J 5/04 Casings
• CPC Class Codes: G01J 5/045 Sealings; Vacuum enclosures; Encapsulated packages; Wafer bonding structures; Getter arrangements getter arrangements per se H01L23/26 and H01L21/3221
• CPC Class Codes: G01J 5/049 Casings for tympanic thermometers
• CPC Class Codes: G01J 5/05 Means for preventing contamination of the components of the optical system; Means for preventing obstruction of the radiation path
• CPC Class Codes: G01J 5/064 Ambient temperature sensor; Housing temperature sensor; Constructional details thereof
• CPC Class Codes: G01J 5/12 using thermoelectric elements, e.g. thermocouples
• CPC Class Codes: G01J 5/16 Arrangements with respect to the cold junction; Compensating influence of ambient temperature or other variables
• CPC Class Codes: G01J 5/53 Reference sources, e.g. standard lamps; Black bodies
• CPC Class Codes: G01J 5/70 Passive compensation of pyrometer measurements, e.g. using ambient temperature sensing or sensing of temperature within housing

Abstract

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.

Claims

1. A radiation thermometer provided with

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, and

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 sensor;

comprising at least a plurality of sensor-temperature measuring means.

2. The radiation thermometer according to claim 1, wherein the plurality of sensor-temperature measuring means are arranged in a position to interpose the infrared-ray sensor therebetween.

3. The radiation thermometer according to claim 1, wherein the infrared-ray sensor is arranged on or in the vicinity of an extension line, which connects the plurality of sensor-temperature measuring means together.

4. A radiation thermometer provided with

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, and

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 sensor;

comprising an infrared-ray sensor receiving member for receiving the infrared-ray sensor, and

wherein the infrared-ray sensor receiving member comprises an object-side portion positioned on a side of the object being measured, relative to the infrared-ray sensor, and

the temperature calculating means has the function of calculating a temperature of the object being measured, on the basis of a quantity of infrared rays irradiated from the object being measured, a quantity of infrared rays irradiated from the object-side portion, and a temperature of the infrared-ray sensor.

5. The radiation thermometer according to claim 4, further comprising temperature-distribution measuring means for measuring a temperature distribution of the object-side portion, and

wherein the temperature calculating means has the function 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 calculating a temperature of the object being measured, on the basis of the calculated quantity of infrared rays, a quantity of infrared rays irradiated from the object being measured, and a temperature of the infrared-ray sensor.

6. The radiation thermometer according to claim 5, wherein the temperature-distribution measuring means is positioned on a side of the object being measured relative to the infrared-ray sensor.

7. The radiation thermometer according to claim 5, 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 sensor per unit time.

8. The radiation thermometer according to any one of claims 5 to 7, further comprising isothermal means for uniformizing a temperature distribution of the object-side portion.

9. The radiation thermometer according to claim 8, 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.

10. The radiation thermometer according to claim 8 or 9, 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.

11. The radiation thermometer according to any one of claims 8 to 10, wherein the isothermal means comprises a mount portion, to which the object-side portion is mounted.

12. A radiation thermometer provided with

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, and

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 sensor;

wherein the temperature calculating means has the function of calculating a temperature of the object being measured, according to a status of the object being measured.

13. The radiation thermometer according to claim 12, further comprising status specifying means for specifying a status of the object being measured, and

wherein the temperature calculating means calculates a temperature of the object being measured, according to a status specified by the status specifying means.

14. The radiation thermometer according to claim 12, further comprising a probe receiving therein the infrared-ray sensor and the sensor-temperature measuring means and inserted into an opening, and

a plurality of temperature sensors as the status specifying means arranged along a direction, in which the probe is inserted.

15. The radiation thermometer according to claim 12, further comprising a probe receiving therein the infrared-ray sensor and the sensor-temperature measuring means and inserted into an opening, and

a temperature sensor as the status specifying means provided on a base side opposed to a direction, in which the probe is inserted.

16. The radiation thermometer according to claim 12, wherein the status specifying means has the function of specifying a status of the object being measured, on the basis of information of variation of the sensor-temperature measuring means.

17. The radiation thermometer according to claim 16, wherein the status specifying means has the function of specifying a status of the object being measured, on the basis of a phase lead component of results of measurement of the sensor-temperature measuring means.

18. The radiation thermometer according to claim 12, wherein the status specifying means has the function of specifying which one of plural statuses of object being measured, the plural statuses being beforehand set.

19. The radiation thermometer according to claim 12, further comprising a device intended for at least either of adjustment of and proof of accuracy of the radiation thermometer, as the object being measured to be specified.

20. The radiation thermometer according to claim 19, wherein the status specifying means has the function of specifying the object being measured, as the device intended for at least either of adjustment of and proof of accuracy of the radiation thermometer, in the case where a predetermined change in radiation temperature is detected after power is turned on.

21. The radiation thermometer according to claim 19, further comprising informing means for informing realization of a predetermined condition in the case where the condition is realized when the object being measured is specified to be the device intended for at least either of adjustment of and proof of accuracy of the radiation thermometer.

22. The radiation thermometer according to claim 19, further comprising display means for displaying a measured temperature with a predetermined accuracy, and

wherein the display means has the function of displaying the measured temperature with a higher accuracy than the predetermined accuracy in the case where the object being measured is specified to be the device intended for at least either of adjustment of and proof of accuracy of the radiation thermometer.

23. The radiation thermometer according to claim 22, wherein the display means has the function of displaying a measured temperature in a region, in which temperature unit is displayed in the case where a measured temperature is displayed with the predetermined accuracy, with the heightend accuracy.

24. A radiation thermometer provided with

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,

a probe receiving therein the infrared-ray sensor and the sensor-temperature measuring means and inserted into an opening, and

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 sensor;

comprising representative temperature presuming means for presuming a temperature of the infrared-ray sensor or information of a temperature representative of anyone of members constituting the probe in conformity to thermal time constants peculiar to the respective members from heat conducted to the infrared-ray sensor and the members by a heat source in the vicinity of an outer wall of the probe.

25. The radiation thermometer according to claim 24, further comprising temperature difference information presuming means for calculating at least either of a phase lead component and a phase lag component of results of measurement of the sensor-temperature measuring means in conformity to thermal time constants of the members present on a heat conduction path passing through the sensor-temperature measuring means to presume a temperature difference information between the sensor-temperature measuring means and at least either of the infrared-ray sensor and the members.

26. The radiation thermometer according to claim 25, wherein at least either of information including a difference of results of measurement of the sensor-temperature measuring means as the phase lead component and information including a weighted mean of results of measurement of the sensor-temperature measuring means as the phase lag component is calculated.

27. The radiation thermometer according to any one of claims 24 to 26, further comprising infrared-ray output correcting means for correcting results of measurement by the infrared-ray sensor continuously from the time of turning on the power on the basis of a temperature presumed by the representative temperature presuming means.

28. The radiation thermometer according to claim 25 or 26, further comprising infrared-ray output correcting means for correcting results of measurement by the infrared-ray sensor continuously from the time of turning on the power on the basis of temperature difference information presumed by the temperature difference information presuming means.

29. The radiation thermometer according to claim 27, wherein the infrared-ray output correcting means has the function of correcting results of measurement by the infrared-ray sensor on the basis of changes of that temperature, which is presumed by the representative temperature presuming means, since the start of measurement of a radiation temperature of the object being measured.

30. The radiation thermometer according to claim 28, wherein the infrared-ray output correcting means has the function of correcting results of measurement by the infrared-ray sensor on the basis of changes of that temperature difference information, which is presumed by the temperature difference information presuming means, since the start of measurement of a radiation temperature of the object being measured.

31. The radiation thermometer according to claim 27, further comprising insertion detecting means for detecting insertion of the probe into the opening, and

wherein the infrared-ray output correcting means has the function of correcting results of measurement by the infrared-ray sensor on the basis of changes of that temperature, which is presumed by the representative temperature presuming means, since the time of detection of insertion by the insertion detecting means.

32. The radiation thermometer according to claim 28, further comprising insertion detecting means for detecting insertion of the probe into the opening, and

wherein the infrared-ray output correcting means has the function of correcting results of measurement by the infrared-ray sensor on the basis of changes of temperature difference information, which is presumed by the temperature difference information presuming means, since the time of detection of insertion by the insertion detecting means.