Ultrasonic waveguide technique for distribute sensing and measurements of physical and chemical properties of surrounding media

Patent metadata

Field	Value
Publication number	US-11022502-B2
Application number	US-201916726123-A
Country	US
Kind code	B2
Filing date	Dec 23, 2019
Priority date	Apr 10, 2015
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

This invention relates to a waveguide with distributed sensors that support traveling ultrasonic wave modes to provide quantitative local distributed sensing of the physical and chemical properties of the medium surrounding the sensor locations and/or the material properties of the waveguide. The plurality of sensors is operably associated with a plurality of wave modes for probing and identifying a plurality of properties simultaneously. The reflected waves are representative of local information about the surrounding media at that sensor location.

First claim

The invention claimed is:

1. A method for distributed sensing and measurements of physical and chemical properties of surrounding media, the method comprising:
generating at least one ultrasonic wave having a wave mode;
providing the at least one ultrasonic wave to a plurality of waveguides, each waveguide has an elongated body configured to guide waves between a first end and a second end to at least one sensor feature of the waveguide between the first end and second end so that each sensor feature reflects a wave mode and/or transmits the wave mode;
receive the at least one ultrasonic wave with at least one first receiver transducer that converts the wave mode that traveled along the elongated body into a first electronic signal, wherein each waveguide has a first receiver transducer at the second end thereof that captures the wave mode from the ultrasonic transmitter transducer at the first end of the corresponding waveguide;
receiving at least one reflected wave mode with at least one second receiver transducer that converts the reflected wave mode from the elongated body into a second electronic signal, wherein each waveguide has a second receiver transducer at the first end thereof that captures the reflected wave mode that is reflected from the second end of the corresponding waveguide or reflected from the sensor feature of the corresponding waveguide, wherein optionally the at least one ultrasonic transmitter transducer and the at least one second receiver transducer are the same transducer;
receiving data into a data collection system from the plurality of first receiver transducers and the plurality of second receiver transducers so as to receive data of the first electronic signal and the second electronic signal; and
calculating, with the data collection system, properties of a fluid surrounding the plurality of waveguides.

2. The method of claim 1 , wherein each waveguide of the plurality of waveguides is in a form selected from solid rod, wire, plate, sheet, hollow tube, pipe or a shell.

3. The method of claim 1 , wherein each waveguide is in a form selected from meandering, circular or a spiral.

4. The method of claim 1 , wherein each waveguide has the same ultrasonic transmitter transducer at the respective first end of each waveguide.

5. The method of claim 1 , wherein each waveguide has a circular, cylindrical, elliptical, triangular, diamond or a hexagonal cross-section.

6. The method of claim 1 , wherein each sensor feature has a form selected from notches, kinks, bends, variable geometry, joints, clamping mechanisms, surface treatments or surface coatings.

7. The method of claim 1 , wherein the at least one ultrasonic transmitter transducer and the at least one second receiver transducer are the same transducer at the first end of each waveguide.

8. The method of claim 1 , wherein the material of the plurality of waveguides is selected from metals or alloys of metals.

9. The method of claim 1 , wherein at least one sensor feature is adapted for partial reflection of the wave mode.

10. The method of claim 1 , wherein at least one sensor feature is adapted for full reflection of the wave mode.

11. The method of claim 1 , wherein at least one sensor feature is adapted for partial transmission of the wave mode.

12. The method of claim 1 , wherein at least one sensor feature is configured to reflect the wave mode into a pulse echo mode.

13. The method of claim 1 , wherein at least one sensor feature is configured for partial transmission of the wave mode in a through-transmission mode.

14. The method of claim 1 , wherein a spacing arrangement between the plurality of sensor features is uniform.

15. The method of claim 1 , wherein a spacing arrangement between the plurality of sensor features is not uniform.

16. The method of claim 1 , wherein the wave modes are selected from longitudinal, flexural or torsional modes.

17. The method of claim 1 , wherein the wave modes are selected from Longitudinal (L(m,n)), Torsional (T(m,n)), Fiexural (F(m,n)), Anti-Symmetric (A(m)), Symmetric (S(m)) or Shear Horizontal (SH(m)).

18. The method of claim 1 , wherein the plurality of ultrasonic transmitter transducers are selected from piezo-electric, electromagnetic, magneto-strictive, thermo-elastic, opto-mechanic al or electro-mechanical.

19. The method of claim 1 , wherein the plurality of ultrasonic transmitter transducers are piezo-electric.

20. The method of claim 1 , wherein the method is performed with at least a portion of at least one waveguide being in an environment having a temperature range of −100° C. to 2000° C.

Assignees

• Indian Institute Of Tech Madras

Inventors

• Balasubramaniam Krishnan
• Periyannan Suresh

Classifications

• G01K11/22 Primary

  using measurement of acoustic effects · CPC title

• G01K3/14

  in respect of space · CPC title

• G01K11/32

  using changes in transmittance, scattering or luminescence in optical fibres · CPC title

• G01K11/24 Primary

  of the velocity of propagation of sound · CPC title