Claims
- 1. A temperature sensing device comprising:
- (a) Generating means for generating constant frequency pressure pulses, said generating means having a first output
- (b) A temperature sensing means comprising a first resonance tube for modulating the amplitude of said pressure pulses from said first output as a function of the temperature to be sensed.
- 2. The device of claim 1 wherein said resonance tube is open ended.
- 3. The device of claim 1 wherein said generating means comprises a fluidic oscillator.
- 4. The device of claim 3 wherein said generating means has a second output and the device further comprises a second resonance tube, said second resonance tube modulating the amplitude of pulses from said second output.
- 5. The device of claim 4 further comprising a summing means to combine the outputs of said first and second resonance tubes.
- 6. The device of claim 5 wherein the output pulses from said first and second resonance tubes are in phase and said summing means functions as a subtractor.
- 7. The device of claim 5 wherein the output pulses from said first and second resonance tubes are 180.degree. out of phase and said summing means functions as an adder.
- 8. The device of claim 5 further comprising a fluidic rectifying means to rectify the output of said summing means.
- 9. The device of claim 8 further comprising a fluidic filter receiving the output of said rectifying means to filter out high frequency pressure pulses.
RIGHTS OF THE GOVERNMENT
The invention described herein may be manufactured, used and licensed by or for the Unied States Government for governmental purposes without the payment to us of any royalty thereon.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3566689 |
Ringwall et al. |
Mar 1971 |
|
3572123 |
Boothe et al. |
Mar 1971 |
|
3618385 |
Kelley et al. |
Nov 1971 |
|