Fluidic temperature sensor system
Abstract
Abstract A FLUIDIC TEMPERATURE SENSING SYSTEM ADAPTED FOR MEASURING AN AVERAGE TEMPERATRE IN A REATIVELY LARGE REGION UTILIZES THE PHASE SHIFT CHARACTERISTIC OF A LONG FLUID TRANSMISSION LINE. A TEMPERATURE SENSING TUBE AND PREHEATER TUBE ARE ARRANGED IN A REGION WHOSE TEMPERATURE IS TO BE MEASURED AND A VARIABLY PRESSURIED FLUID IS CIRCULATED THROUGH THE SENSOR TUBE. THE FLUID AT THE INPUT END OF THE SENSOR TUBE IS EXCITED BY A CONSTANT FREQUENCY FLUIDIC OSCILLATOR TO PROVIDE THE PRESSURE VARIATION, AND A FLUIDIC PHASE DISCRIMINATOR IS CONNECTED ACROSS THE TUBE FOR DETECTING A PHASE SHIFT OF THE PRESSURE WAVE IN ITS TRANSMISSION THROUGH THE SENSOR TUBE. THE PHASE SHIFT ACROSS THE SENSOR TUBE OF FIXED LENGTH IS PROPORTIONAL TO THE ABSOLUTE TEMPERATURE OF THE FLUID WITHIN THE TUBE, AND IF THE TUBE IS EXPOSED TO VARYING TEMPERATURE THE PHASE SHIFT REPRESENTS AN AVERAGE TEMPERATURE.
Inventors
- 👤 Carl G Ringwall
- 👤 Lonny R Kelley
Bibliographic Details
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| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |