Fiber Optic Sensors, Fiber Optical Temperature Sensor - RM


Presentation Description

Check what is Fiber Optic Sensor? The sensor which uses optical fiber as sensing device. Rugged Monitoring have top fiber optic temperature sensors team on monitors, Software accessories, E-mobility, medical, energy, RF/Microwave, research labs etc.For more:


Presentation Transcript

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1 Fiber Optic Temperature Measurement Technology ï Visible Infrared ð 0 100 OPERATING PRINCIPLE § Based on a well known and reproducible phenomenon o The band-gap variation in the absorption spectrum of the semiconductor GaAs Gallium Arsenide with respect to temperature § GaAs can also be looked at as a variable optical filter low pass o Wavelengths towards visible are blocked o Wavelengths towards infrared are transmitted § A Direct Contact temperature sensor § GaAs material properties will never change with time ever o No DRIFT… o No RECALIBRATION…

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2 Fiber Optic Temperature Measurement Technology SYSTEM DESIGN § The System consists of § Light source § Optical coupler § Rugged Spectrometer § Electronics for Data Processing Storage Visualization § An optical fiber delivers white light to the semiconductor GaAs sensor glued at the Probe Tip § Some of the light is absorbed – Depending on the temperature of the GaAs Crystal at the Probe Tip § The light is reflected by a dielectric mirror and returns through the same fiber for analysis by the on-board Spectrometer § Highly reliable monitors suited to automotive environments GaAs Sensor Fiber Optic Probe Optical Coupler Spectrometer While Light Source FIBER OPTIC TEMPERATURE SYSTEM Dielectric Mirror Coating GaAs Crystal Sensor Fiber Cladding Fiber Core Injected Light Reflected Light

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Radio Frequency 100 kHz up to 10 MHz Chemicals: All pH levels 0 – 14 High voltage: Greater than 1200kV Radiation: Nuclear Microwave 300MHz to 300GHz Magnetic Field: Greater than 25 Tesla Vibration: 10g+ Force Bio Safe: Sterile Environments 3 § No Need for Isolation: Highly dielectric strength § Avoid complex compensation and Calibration: Immune to Noise § Ultra Fast Response: Accurate Thermal Profiling § Smaller Size and Intrinsically Safe: Easy to use and handle Sensors § Explosion Proof: Suitable for Explosive Environments Fiber Optic Sensors: Immunity to Environments

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4 § Electric vehicles are going to 1000V+ 700A+ for cars and 2400V+ 1000A+ for trucks § Traditional thermocouples are too slow and significant limitation above 200V § Thermocouple output is in millivolts and gets affected by Electric and Magnetic fields § Safety Risk from Thermocouples: Risk of short circuit at higher voltages Corrosion etc. § Thermocouples are Non-Linear: Sensors are non-linear require complex compensation § Thermocouples are large: not suitable to fit into tiny spaces on PCBs Power Electronics Charging Points § Slower Response: Thermocouples are not fast enough for accurate thermal profiling § Variation from Batch to Batch: Impact accuracy and repeatability of testing § Susceptible to High Voltage and Magnetic Fields § Thermocouples are not suitable for Explosive Environments § Thermocouples are not suitable with longer signal cables Benefits of Fiber Optic Sensors over Traditional Sensors

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Application for Fiber Optic Temperature Sensors 5 Energy/ Utilities E-Mobility Medical RF / Microwave Industrial Research Lab Fiber Optic Temperature Sensors: applications § Microwave Heating § Microwave Digestion § Microwave Ablation § RF / Microwave Drying § Food Packaging § Soil decontamination § Glass Manufacturing § Process and Control § Mining Applications § Cryogenic Research § Pharmaceutical Research § Consumer Product Research § Environmental Research § MRI Machines / Coils § Sensor for Catheters § CT scan PAT scan § Clinical Trails § Cancer Treatment § EV Motors § EV Battery Cells § EV Battery Module § EV Battery Pack § Power Electronics § Charging Equipment § Transformer Winding Hot Spot Monitoring § Switchgear Temperature Monitoring § Motor Winding Temperature Monitoring § Cable Termination Temperature

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