Poster Template - isc.mst.edu

Poster Template - isc.mst.edu

Embeddable Sensors Based on Novel Microwave Gratings

Background
Background
Sensor requirements for SHM under various conditions

Coaxial cable Bragg grating (CCBG)

CCBG: drilling holes into a coaxial cable at a
periodic distance (6.4cm.cm) along the cable
Bragg resonance observed at the fundamental80
frequency of 1.56GHz in reflection and
transmission spectra
Repeating occurrences at multiples of the
60
fundamental frequency (high order modes)
Resonance frequency shifted as a function of
temperature and strain
40

Parameters of interests

Temperature, pressure, strain, vibrations, etc.

Requirements

Survive and operate at high temperatures
Withstand high pressure
Large dynamic range
High sensitivity
Embeddable

0.7

High temperature capability due to a wide range of available materials
Robust and large dynamic range
Various design possibilities to achieve high resolution
Inexpensive: excited, probed and processed in electrical form
Embeddable and remote interrogation

30deg
4cm.0deg
50deg
60deg
70deg
80deg
90deg
100 deg
110 deg
120 deg
130 deg
14cm.0 deg
150 deg
160 deg
170 deg
180 deg
190 deg
200 deg
210 deg
220 deg

0.6
0.5
0.4cm.
0.3
0.2
0.1
0
3.7

3.75

3.8

3.85

3.9

3.95
4cm.
Freq[GHz]

4cm..05

4cm..1

4cm..15

4cm..2

Frequency shift vs. strain

20

0
-20

0
0

Advantages of microwave waveguides

Frequency shift vs. temperature
100

Normalized MHz

Develop a new embeddable sensor platform using microwave gratings
1) Understand physics of sensors via simulation
2) Design and fabricate robust and high-temperature tolerant sensors
3) Demonstrate new sensors for structure health monitoring (SHM)

Related Work
Work
Related

[1]
[1]

S11

Project
Project Objectives
Objectives

Faculty Advisor: Dr. Hai Xiao, Electrical Engineering

Normalized Freq shift (MHz)

Student: Ken Smith, Electrical and Computer Engineering

RG-58 Flexible
Linear fit of left
Linear fit of righ

-40
-60
-80
-100
-120
-140

Resonance spectra of a CCBG made on a RG-58/U
coaxial cable with = 6.4cm.cm.

30
0.0

0.6

60
1.2

90

120

Temperature (C)

1.8 2.4 3.0
Axial strain ()

3.6

4.2

4.8

Planned
Planned Work
Work
New ceramic waveguide high temperature sensors
Modeling and simulation based design of new high temperature tolerant sensors
using ceramic microwave structures (e.g., hollow ceramic waveguide)
Fabrication of microwave Bragg gratings using ceramic waveguides
Development of sensor interrogation algorithms
Evaluate sensor and system performance
Embed sensors into structures and demonstrate the capabilities

Concept
Concept
Microwave Bragg Grating
Periodic impedance changes in a waveguide
An electromagnetic (EM) wave is partially
reflected at the impedance discontinuities
Superposition of in-phase reflections
generates resonance in the reflection and
transmission spectra
Resonance wavelength is determined by the
Bragg condition

Summary
Summary

)

Microwave Bragg grating: a novel concept with great
potentials for various sensing applications
Robust and embeddable ceramic waveguide sensors
for structural health monitoring in high-temperature
harsh environment

REFERENCES
[1] T. Wei, S. Wu, J. Huang, H.
Xiao, J. Fan, Coaxial Cable
Bragg Grating, Applied Physics
Letter, v.99, pp. 113517, 2011.

150

Recently Viewed Presentations

  • Intragovernmental Transactions Working Group (ITWG) May 8, 2018

    Intragovernmental Transactions Working Group (ITWG) May 8, 2018

    Three IPAC transactions are required to collect all $300 (see next slide) Assumes IPAC must reference an Order/Line/Schedule in G-Invoicing. Solution: Buyer initiates the Order through G-Invoicing. Set up the Order to meet your requirements.
  • TONE - Gillian Duff's English Resources

    TONE - Gillian Duff's English Resources

    TONE What it is and how to recognise it … What is tone? The writer's or speaker's attitude toward the subject & the audience. With speaking, tone is easy to hear in a person's voice. With writing, tone is determined...
  • Pakistan Society Of Chemical Pathologists Zoom Series of ...

    Pakistan Society Of Chemical Pathologists Zoom Series of ...

    Aminoaciduria, protenuria, microalbuminemia, glycosuria (3) Acquired Renal cause: Non FGF23 mediated. Proximally acting diuretics (Acetolamide) Impaired proximal tubule reabsorption of phosphate. Hypophosphataemia (4) Primary and Secondary Hyperparathyroidism.
  • Le France

    Le France

    Jeanne d'Arc. Née vers 1412 à Domrémy et morte dans sa 19e anné, est une héroïne de l'histoire de France, chef de guerre et sainte de l'Église catholique. Elle est vendue aux Anglais par Jean de Luxembourg pour la somme...
  • Acids and Bases

    Acids and Bases

    Calculate the pH of the wine on these two occasions. ... Molecular Structure and Oxoacid Strength. 1. Oxoacids having different central atoms (Z) that . are from the same group. ... Lewis acid. is a substance that can accept a...
  • Chapter Chapter 01 01 Lecture Lecture Outline Outline

    Chapter Chapter 01 01 Lecture Lecture Outline Outline

    axial. portion (head, neck, and trunk) and an . appendicular. portion (upper and lower limbs) The axial portion contains several cavities that house body organs: - Cranial cavity - brain - Vertebral canal - spinal cord.
  • Nouns and Verbs

    Nouns and Verbs

    What is a noun? A person A place A thing An idea There are 2 kinds of Nouns Common Proper What's the difference? A common noun is general (ex. ice cream) A proper noun is specific (ex. Ben and Jerry's...
  • Information Session Mechanical Engineering Capstone Choices Rosario Quinzon-Bonello

    Information Session Mechanical Engineering Capstone Choices Rosario Quinzon-Bonello

    BME/ME/CSE Rehab Eng Capstone Instructor. [email protected] Lots of choices. This session is a change to get more information and to ask questions. Opportunity to get more out of capstone. Make an intelligent choice reflecting your interest.