Ear thermometer radiation detector

• US 5,381,796 A
• Filed: 05/22/1992
• Issued: 01/17/1995
• Est. Priority Date: 05/22/1992
• Status: Expired due to Term

• Current Assignee: PNC Bank National Association (The PNC Financial Services Group, Inc.)
• Original Assignee: Exergen Corporation
• Inventors: Pompei, Francesco
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): Lacyk, John P.
• Application Number:
  US07/889,052
• Time in Patent Office: 970 Days
• Field of Search: 128/736, 128/738, 128/664, 374/121, 374/130-131, 374/116
• US Class Current: 600/474
• CPC Class Codes: G01J 5/02 Constructional details
• CPC Class Codes: G01J 5/025 Interfacing a pyrometer to an external device or network; User interface
• CPC Class Codes: G01J 5/04 Casings
• CPC Class Codes: G01J 5/049 Casings for tympanic thermometers
• CPC Class Codes: G01J 5/06 Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity for adjusting of solid angle of collected radiation G01J5/07; means for wavelength selection G01J5/0801

Abstract

A radiation detector comprises an extension shaped to be comfortably positioned in an outer ear area for obtaining temperature indications without discomfort to the subject. The extension increases non-linearly in diameter along a portion of its distal end forming a rounded distal tip. The extension is positioned in an ear canal such that the rounded tip is disposed at the opening to the ear canal. An infrared radiation sensor is positioned in the detector for receiving radiation emitted from the ear canal. An electronics unit converts the received radiation to a temperature indication.

Claims

1. A temperature detector comprising:

an extension increasing non-linearly in diameter along a portion of its length from a distal end of the extension to form a rounded distal tip, the extension being adapted to be inserted into an outer ear such that the rounded distal tip is disposed adjacent to an ear canal opening, the rounded tip having a substantially spherical shape with a radius within the range of 5-10 mm to a diameter adjacent a distal end of the extension such that the extension is substantially incapable of being inserted into an ear canal;

an infrared radiation sensor positioned in the detector for receiving radiation from the ear canal which passes through the distal end of the extension; and

an electronics unit for converting radiation received by the sensor to temperature.

2. A temperature detector as claimed in claim 1 further comprising a window positioned in an aperture at the distal tip.

3. A temperature detector as claimed in claim 1 wherein the rounded distal tip is adapted to seal the opening of the ear canal.

4. A temperature detector as claimed in claim 1 where the extension has a substantially constant diameter along a second portion of its length following the portion forming the rounded distal tip.

5. A temperature detector as claimed in claim 4 wherein the substantially constant diameter is in the range of about 10-20 mm.

6. A temperature detector as claimed in claim 4 wherein the extension has an aperture at its distal end through which the sensor receives radiation, the aperture having a diameter which is up to 75% of the substantially constant diameter of the second portion of the extension.

7. A temperature detector as claimed in claim 4 wherein the extension has an increasing diameter along a third portion of its length following the second portion.

8. A temperature detector as claimed in claim 1 wherein the radiation sensor is a thermopile.

9. A temperature detector as claimed in claim 1 wherein the electronics unit converts radiation received by the sensor to temperature in less than about one second.

10. A temperature detector as claimed in claim 1 wherein the electronics unit converts radiation received by the sensor to temperature in less than about 0.5 seconds.

11. A temperature detector as claimed in claim 1 wherein the electronics unit provides the temperature as a function of the received radiation compensated to provide a core temperature approximation.

12. A temperature detector as claimed in claim 11 wherein the electronics is adapted to provide a peak temperature reading with scanning of the sensor relative to an ear.

13. A temperature detector as claimed in claim 1 wherein the rounded distal tip is formed of soft, flexible material.

14. A temperature detector as claimed in claim 1 wherein the electronics unit is adapted to provide a peak temperature reading with scanning of the sensor relative to an ear.

15. A temperature detector comprising:

an extension increasing non-linearly in diameter along a portion of its length from a distal end of the extension to form a rounded distal tip, the extension being adapted to be inserted into an outer ear such that the rounded distal tip is disposed adjacent to an ear canal opening, the rounded tip having a diameter adjacent a distal end of the extension such that the extension is substantially incapable of being inserted into an ear canal, a portion of the extension being adapted to be retracted to expose an inner extension, the inner extension being adapted to be inserted into an ear canal;

an infrared radiation sensor positioned in the detector for receiving radiation from the ear canal which passes through the distal end of the extension; and

an electronics unit for converting radiation received by the sensor to temperature.

16. A temperature detector comprising:

a housing adapted to be held by hand;

an extension from the housing non-linearly increasing in diameter along a portion of its length from a distal end to form a rounded distal tip, the extension adapted to be inserted into an outer ear such that the rounded distal tip is disposed at an opening to an ear canal, the rounded distal tip having a substantially spherical shape with a radius within the range of 5-10 mm to a diameter adjacent a distal end of the extension such that the extension is substantially incapable of being inserted into the ear canal;

an infrared radiation sensor positioned in the detector for receiving radiation from the ear canal which passes through the extension;

a temperature display on the housing for displaying temperature; and

battery powered electronics in the housing for converting radiation receive by the sensor to temperature displayed by the display.

17. A temperature detector as claimed in claim 16 wherein the rounded tip is shaped to seal the opening to the ear canal.

18. A temperature detector as claimed in claim 16 wherein the extension has a substantially constant diameter along a second portion of its length following the portion forming the distal tip and an increasing diameter along a third portion of its length following the second portion.

19. A temperature detector as claimed in claim 18 wherein the substantially constant diameter is about 10-20 mm.

20. A temperature detector as claimed in claim 18 wherein the extension has an aperture at the distal end through which the radiation sensor receives radiation, the aperture having a diameter which is up to about 75% of the substantially constant diameter of the second portion.

21. A temperature detector as claimed in claim 20 further comprising a window positioned in the aperture.

22. A temperature detector as claimed in claim 16 wherein the electronics converts radiation received by the sensor to temperature displayed by the display in less than about 0.5 seconds.

23. A temperature detector as claimed in claim 16 wherein the electronics provides the temperature displayed on the housing as a function of the received radiation compensated to provide a core temperature approximation.

24. A temperature detector as claimed in claim 23 wherein the electronics unit is adapted to provide a peak temperature reading with scanning of the sensor relative to an ear.

25. A temperature detector as claimed in claim 16, wherein the rounded distal tip is formed of soft, flexible material.

26. A temperature detector as claimed in claim 16 wherein the electronics unit is adapted to provide a peak temperature reading with scanning of the sensor relative to an ear.

27. A method for measuring temperature comprising:

providing a temperature detector having an extension, an infrared radiation sensor and an electronics unit;

inserting the extension into an outer ear against the opening of an ear canal, the extension having an increasing diameter along a portion of its length for its distal end to form a rounded distal end having a radius greater than the ear canal radius, the rounded distal end sealing an opening to an ear canal such that the extension is substantially incapable of being inserted into the ear canal;

sensing radiation emitted from the ear canal, which passes into the extension, with the sensor; and

converting the sensed radiation in an electronics unit to a temperature indication.

28. A method as claimed in claim 27 further comprising displaying the temperature indication on a display.

29. A method as claimed in claim 27 wherein the detector provides a temperature indication in less than about one second.

30. A method as claimed in claim 27 wherein the detector provides a temperature indication in less than about 0.5 seconds.

31. A method as claimed in claim 27 wherein the step of providing comprises providing a temperature detector having an extension with a rounded distal end which has a spherical shape with a radius in the range of 5-10 mm.

32. A method as claimed in claim 27 wherein the step of providing comprises providing a temperature detector having an extension which has a diameter in the range of 10-20 mm following a rounded tip.

33. A temperature detector comprising:

an extension having a tip of soft, flexible material, the extension being adapted to be inserted into an outer ear such that the tip is disposed adjacent to an ear canal opening, the rounded tip having a substantially spherical shape with a radius within the range of 5-10 mm to a diameter adjacent a distal end of the extension such that the extension substantially incapable of being inserted into an ear canal;

an infrared radiation sensor positioned in the detector for receiving radiation from the ear canal which passes through the distal end of the extension; and

an electronics unit for converting radiation received by the sensor to temperature.