- Patent Number:
12241,795
- Appl. No:
17/267298
- Application Filed:
July 19, 2019
- نبذة مختصرة :
A thermally luminescent temperature sensor with a rare earth emitter having a first selective electromagnetic light energy emission band and a second selective electromagnetic light energy emission band in which the rare earth emitter converts thermal energy to electromagnetic light energy within the first and second selective energy emission bands. The sensor also has a selective optical detector in optical communication with the rare earth emitter, wherein the selective optical detector independently detects each the first and second selective electromagnetic light energy emission bands. Lastly, the thermally luminescent temperature sensor determines the temperature based on the electromagnetic light energy measured within the first and second selective energy emission bands relative to each other. Optionally additional emission bands may be used in the evaluation of the temperature.
- Inventors:
TDA Research, Inc (Wheat Ridge, CO, US)
- Assignees:
TDA Research, Inc. (Golden, CO, US)
- Claim:
1. A thermally luminescent temperature sensor, comprising: a rare earth emitter having a first selective electromagnetic light energy emission band and a second selective electromagnetic light energy emission band, wherein, in response to a temperature, the rare earth emitter converts thermal energy to electromagnetic light energy within the first selective energy emission band and electromagnetic light energy within the second selective energy emission band; a selective optical detector in optical communication with the rare earth emitter, wherein the selective optical detector independently detects each the first selective electromagnetic light energy emission band and the second selective electromagnetic light energy emission band; and wherein the thermally luminescent temperature sensor determines the temperature based on the electromagnetic light energy measured within the first selective energy emission band relative to the electromagnetic light energy measured within the second selective energy emission band.
- Claim:
2. The thermally luminescent temperature sensor of claim 1 , wherein the thermally luminescent temperature sensor determines the temperature using an algorithm that comprises the ratio of the electromagnetic light energy within the first selective energy emission band to the electromagnetic light energy within the second selective energy emission band.
- Claim:
3. The thermally luminescent temperature sensor of claim 1 , wherein the thermally luminescent temperature sensor determines the temperature using an algorithm that comprises the difference of the electromagnetic light energy within the first selective energy emission band and the electromagnetic light energy within the second selective energy emission band.
- Claim:
4. The thermally luminescent temperature sensor of claim 1 , wherein the rare earth emitter comprises a rare earth aluminum garnet.
- Claim:
5. The thermally luminescent temperature sensor of claim 4 , wherein the rare earth emitter comprises Er 3 Al 5 O 12 .
- Claim:
6. The thermally luminescent temperature sensor of claim 5 , wherein the first selective electromagnetic light energy band is centered at 790 nm and the second selective electromagnetic light energy band is centered at 964 nm.
- Claim:
7. The thermally luminescent temperature sensor of claim 1 , wherein the first selective electromagnetic light energy band and the second selective electromagnetic light energy band have a bandwidth of at most 50 nm.
- Claim:
8. The thermally luminescent temperature sensor of claim 7 , wherein the first selective electromagnetic light energy band and the second selective electromagnetic light energy band have a bandwidth of at most 2.5 nm.
- Claim:
9. The thermally luminescent temperature sensor of claim 1 , further comprising a light pipe having a first end and a second end, the first end communicating with the rare earth emitter and the second end communicating with the selective optical detector.
- Claim:
10. The thermally luminescent temperature sensor of claim 9 , wherein the light pipe comprises a sapphire optical fiber.
- Claim:
11. A thermally luminescent temperature sensor, comprising: a rare earth emitter having a first selective electromagnetic light energy emission band, a second selective electromagnetic light energy emission band, a third selective electromagnetic light energy emission band, and a fourth selective electromagnetic light energy emission band, wherein, in response to a temperature, the rare earth emitter converts thermal energy to electromagnetic light energy within the first selective energy emission band, the second selective electromagnetic light energy emission band, the third selective electromagnetic light energy emission band, and the fourth selective electromagnetic light energy emission band; a selective optical detector in optical communication with the rare earth emitter, wherein the selective optical detector independently detects each the first selective electromagnetic light energy emission band, the second selective electromagnetic light energy emission band, the third selective electromagnetic light energy emission band, and the fourth selective electromagnetic light energy emission band; and wherein the thermally luminescent temperature sensor determines the temperature based on the electromagnetic light energy measured within the first selective energy emission band relative to the electromagnetic light energy measured within the second selective energy emission band, and the electromagnetic light energy measured within the third selective energy emission band relative to the electromagnetic light energy measured within the fourth selective energy emission band.
- Claim:
12. The thermally luminescent temperature sensor of claim 11 , wherein the thermally luminescent temperature sensor determines the temperature using an algorithm that comprises the ratio of the electromagnetic light energy within the first selective energy emission band to the electromagnetic light energy within the second selective energy emission band.
- Claim:
13. The thermally luminescent temperature sensor of claim 11 , wherein the thermally luminescent temperature sensor determines the temperature using an algorithm that comprises the difference of the electromagnetic light energy within the first selective energy emission band and the electromagnetic light energy within the second selective energy emission band, wherein the thermally luminescent temperature sensor evaluates the temperature using an algorithm that comprises the ratio of the energy within the first selective electromagnetic light energy emission band to the energy within the second selective electromagnetic light energy emission band and the ratio of the third selective electromagnetic light energy emission band to the fourth selective electromagnetic light energy emission band.
- Claim:
14. The thermally luminescent temperature sensor of claim 11 , wherein the rare earth emitter comprises a rare earth aluminum garnet.
- Claim:
15. The thermally luminescent temperature sensor of claim 11 , wherein the rare earth emitter comprises Er 3 Al 5 O 12 .
- Claim:
16. The thermally luminescent temperature sensor of claim 15 , wherein the first selective electromagnetic light energy band is centered at 790 nm, the second selective electromagnetic light energy band is centered at 964 nm, the third selective electromagnetic light energy band is centered at 1470 nm, and the fourth selective electromagnetic light energy band is centered at 1615 nm.
- Claim:
17. The thermally luminescent temperature sensor of claim 11 , wherein the first selective electromagnetic light energy band and the second selective electromagnetic light energy band have a bandwidth of at most 50 nm.
- Claim:
18. The thermally luminescent temperature sensor of claim 11 , further comprising a light pipe having a first end and a second end, the first end communicating with the rare earth emitter and the second end communicating with the selective optical detector.
- Claim:
19. The thermally luminescent temperature sensor of claim 18 , wherein the light pipe comprises a sapphire optical fiber.
- Claim:
20. The thermally luminescent temperature sensor of claim 11 , wherein the selective optical detector further comprises an optical splitter, at least two visible photodiodes and at least two near-infrared photodiodes.
- Patent References Cited:
4075493 February 1978 Wickersheim
6746149 June 2004 Chubb
2966978 May 2012
- Other References:
Wade, Scott and William Baxter (2003) “The fluorescence intensity ratio technique for optical fiber point temperature sensing” Journal of Applied Physics ⋅ Oct. 2003 (Year: 2003). cited by examiner
- Primary Examiner:
Huls, Natalie
- Attorney, Agent or Firm:
Elliott, Brian J.
Clinger, Grace B.
- الرقم المعرف:
edspgr.12241795
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