Radiation thermometer

• US 20040233968A1
• Filed: 06/25/2004
• Published: 11/25/2004
• Est. Priority Date: 06/13/2000
• Status: Active Grant

• Current Assignee: Omron Healthcare Company Limited (Omron Corporation)
• Original Assignee: Omron Corporation
• Inventors: Ogura, Yoshihiko, Sato, Tetsuya, Tabata, Makoto, Ota, Hiroyuki, Onishi, Yoshihide, Sato, Taiga
• Granted Patent: US 7,434,992 B2
• Time in Patent Office: Days
• US Class Current: 374/121
• 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

1-4. -4. (Canceled)

5. 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 sensor, the temperature calculating means comprising an infrared-ray sensor receiving member for receiving the infrared-ray sensor which receiving member comprises an object-side portion positioned on 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 functions 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 and 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 irradiated from the object being measured, and a temperature of the infrared 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 a sensor per unit time.

8. The radiation thermometer according to claim 5, or 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, 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 claim 8, wherein the isothermal means comprises a mount portion, to which the object-side portion is mounted.

33. The radiation thermometer according to claim 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.

34. The radiation thermometer according to claim 9, wherein the isothermal means comprises a mount portion, to which the object-side portion is mounted.

35. The radiation thermometer according to claim 10, wherein the isothermal means comprises a mount portion, to which the object-side portion is mounted.

6. (Canceled)

12. 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 sensor, and

temperature calculating means for calculating a temperature of a 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.

14-32. -32. (Canceled)