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Dec 09, 2023 326 likes •607 views

See What Youve Been Missing with HD Fiber Optic Sensing How Fiber Optic Sensing Enables the Acquisition of Critical Data Presenter Nick Scott B.S. Mechanical Engineering from Virginia Tech Luna Applications Engineer Supports: Project

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How Fiber Optic Sensing Enables the Acquisition of Critical Data

See What You’ve Been Missing with HD Fiber Optic Sensing

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SLIDE 2

Presenter

Nick Scott

B.S. Mechanical Engineering from Virginia Tech Luna Applications Engineer Supports: ▪ Project research testing and design ▪ Customer training and applications

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How Fiber Optic Sensing Enables the Acquisition of Critical Data

See What You’ve Been Missing with HD Fiber Optic Sensing

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Measurements and Critical Data

Research Product Design and Verification Manufacturing Operations and Support

Simulation Verification Advanced Characterization Model Calibration Performance Testing Process Optimization and Control Quality Control End-of-Line Testing Diagnostics and Troubleshooting Condition Monitoring

Temperature | Strain | Pressure | Load/Force | Vibration | Acoustics | Displacement

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SLIDE 5

Limitations of Traditional Data Acquisition and Sensors

Sparse Data

  • Discrete and expensive

measurement points

  • Incomplete picture

Selected Sensor Locations

Vulnerable to Environment

  • Susceptible to electromagnetic

interference, high voltages and corrosion

Bulky Cabling and Sensors

  • Multiple wires per sensor
  • Limited application due to

size and weight

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SLIDE 6

How DO We Acquire Critical Data We Need?

Advanced Materials and Composites Multi-Material Joining and Bonding Batteries and Electric Powertrains Additive Manufacturing Digital Twins and Advanced Modeling Predictive Maintenance Industrial IoT Smart Parts and Smart Systems Autonomous Transport Smart Infrastructure

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What is Fiber Optic Sensing?

Data Acquisition System Optical Interrogator Electrical Sensors Sensor Cabling (multiple copper wires per sensor)

  • Foil strain gages
  • Thermocouples
  • RTDs
  • Load Cells
  • Accelerometers
  • Etc…

Optical Fiber

Traditional Data Acquisition and Measurement Systems Distributed Fiber Optic Sensing

Fiber Optic Sensors

Multiple sensing points (up to thousands)

  • n single optical fiber
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Fiber Optic Sensing – How It Provides Critical Data Small, lightweight and flexible

Embed sensors directly into

  • composite materials
  • welds and adhesive joints
  • 3D-printed parts

Instrument complex geometries Create smart parts with embedded or surface mounted sensors

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SLIDE 9

More Data, More Insight

Faster, more complete validation

  • f models and simulations

Don’t miss critical hot spots

  • r unexpected details

Very low incremental cost for additional measurement points

More data for process control and optimization

Z

Fiber Optic Sensing – How It Provides Critical Data

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Electrically Passive and Environmentally Stable

Immune to electromagnetic interference (EMI) Unaffected by high voltages Won’t corrode

Fiber Optic Sensing – How It Provides Critical Data

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SLIDE 11

Distribute and synchronize hundreds or thousands of measurements on versatile optical fiber Span long distances (no impact on measurement quality)

Distributed

Easily and economically instrument large areas and structures

Fiber Optic Sensing – How It Provides Critical Data

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Multi-Parameter Measurements

Multiple measurement types on a single fiber

Optical Interrogator

Temperature Strain Displacement Vibration Vibration Strain Temperature

Fiber Optic Sensing – How It Provides Critical Data

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Ways Fiber Optic Sensing Shows What You’ve Been Missing

  • 1. Small, lightweight and flexible
  • 2. More data, more insight
  • 3. Electrically passive and

environmentally stable

  • 4. Distributed
  • 5. Multi-parameter
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Distributed Sensors Single-Point Sensor

Types of Fiber Optic Sensing

Single sensing element Multiple sensing points Continuous sensing along fiber Multiplexed/Quasi-Distributed Fully Distributed

Optical fiber Optical fiber Optical fiber

  • Fabry-Pérot Sensors
  • Single Fiber Bragg Grating
  • Fiber Bragg Gratings
  • Rayleigh
  • Raman
  • Brillouin
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Fiber Bragg Grating (FBG) Sensing – How Does It Work?

Transmitted Signal λ1

λ

λ2 λ3

λ

Fiber Bragg Gratings (FBGs)

fiber core

Reflected Signal λ1

λ

λ2 λ3 λ1 λ2 λ3 Transmitted Signal

λ

Reflected Bragg wavelengths ( n) change with strain and temperature

Reflected Signal

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High-Speed FBG Sensing System

Surface Strain Embedded Strain Temperature Acceleration

(multiplexed Fabry-Perot)

ENLIGHT Measurement Software HYPERION Interrogator

HYPERION

Sensors

Hundreds of sensors per system Strain, temperature, acceleration, displacement, etc. Acquisition rates up to 5 kHz Long fiber range (km’s)

Up to 16 parallel channels

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High-Definition (Rayleigh) FO Sensing – How Does it Work?

Optical Fiber

Rayleigh backscatter due to natural minute variations in index of refraction in fiber core Tunable Laser Source Strain/Temperature vs. Length

  • Backscatter signal provides unique “fingerprint” of fiber
  • Frequency shift correlates to change in applied strain or temperature
  • OFDR system resolves shift along fiber length with high resolution

Rayleigh Backscatter Signal Signal Processing Length (m) Microstrain

fiber core

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High-Definition Fiber Optic Sensing System

ODiSI (Optical Distributed Sensor Interrogator)

ODiSI

HD Sensors – Strain and Temperature

Up to 8 parallel channels

Measures strain or temperature continuously along fiber (resolution down to 0.65 mm) Sensor length up to 50 m (per channel) Acquisition rates up to 250 Hz

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Comparing ODiSI and HYPERION

High-Definition (Rayleigh) Fiber Optic Sensing High-Speed (FBG/FP) Fiber Optic Sensing

Ultra-high spatial resolution High-speed measurements Measure continuously along standard

  • ptical fiber

FBGs or FBG/FP-based transducers distributed on optical fiber Strain, Temperature Strain, Temperature, Acceleration, Displacement, Pressure

ODiSI HYPERION

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DEMO

Sensing with Luna ODiSI 6100 and Hyperion Systems

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How DO We Acquire Critical Data We Need?

Advanced Materials and Composites Multi-Material Joining and Bonding Batteries and Electric Powertrains Additive Manufacturing Digital Twins and Advanced Modeling Predictive Maintenance Industrial IoT Smart Parts and Smart Systems Autonomous Transport Smart Infrastructure

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Advanced Material Joining and Welding

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Battery Testing and Monitoring

Challenge

Characterize or validate thermal response of cells Detect and locate hot spots, thermal runaway

Traditional Approach

Selectively attach thermocouples, RTDs, thermistors at few key locations Carefully manage electrical grounding and isolation circuits to avoid damage to measurement equipment and battery

FOS Solution

High-definition fiber optic sensing Single sensor fiber attached across terminals

  • r integrated into assembly

Simple, safe and cost effective

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Distributed, Dynamic Structural Monitoring

Challenge

Characterize dynamic response of large structure Correlate distributed measurements to analyze global behavior or locate events

FOS Solution

Capture distributed measurements of

  • Vibration/acoustics
  • Dynamic strain
  • Static strain, temperature, displacement

Time-synchronized measurements over large areas

Operational Modal Analysis Security/Intrusion Detection (Vibration)

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Smart Parts and Smart Systems – with FOS

Challenge

Embed sensors permanently into materials and components Detect damage, assess condition and health “Cradle to grave” monitoring and rapid inspection

FOS Solution/Examples

Smart parts and smart materials with HD sensors embedded into material

  • No structural impact of embedded sensors
  • Sensors interrogated at service intervals

Onboard real-time health monitoring with FBG sensors

  • Economical embedded measurement system
  • Lightweight, distributed sensing network

Composite overwrapped pressure vessel with embedded fiber sensors

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  • 1. Small, lightweight and flexible
  • 2. More data, more insight
  • 3. Electrically passive and

environmentally stable

  • 4. Distributed
  • 5. Multi-parameter

High-Definition Fiber Optic Sensing

  • Ultra-high spatial resolution,

down to 0.65 mm

  • Low-profile, embeddable sensors
  • Strain and temperature
  • Identify Critical Areas

ODiSI

Ways Fiber Optic Sensing Shows What You’ve Been Missing

High-Speed Fiber Optic Sensing

  • Long range and coverage (km’s)
  • Easy-to-use rugged sensors
  • Strain, temperature, acceleration,

displacement, pressure

  • Monitor Critical Areas

HYPERION

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QUESTIONS?

Website: www.lunainc.com Email: solutions@lunainc.com Sales Support: 1.866.586.2682

High-Definition Fiber Optic Sensing

  • Ultra-high spatial resolution,

down to 0.65 mm

  • Low-profile, embeddable sensors
  • Strain and temperature
  • Identify Critical Areas

ODiSI

High-Speed Fiber Optic Sensing

  • Long range and coverage (km’s)
  • Easy-to-use rugged sensors
  • Strain, temperature, acceleration,

displacement, pressure

  • Monitor Critical Areas

HYPERION