Sensors for Power, Environment, Energy and Research

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Sensors for Power, Environment, Energy and
Research

• Sensors _at_ PEER

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Science Technology for Sensors _at_ PEER

• Adsorption type sensors
• Such sensors are low cost and easy to
  manufacture, but suffers from baseline drift and
  slow response.
• At PEER, we are developing novel sniffing
  schemes coupled with MEMS technology to remove
  the drift problem and improve response time.
• Chemical transient imaging
• Help closing the basic loop in combustion by
  imaging transient species under high temperature
  and pressure.
• At PEER, we are developing high power UV lasers
  for PLIF imaging and multispectral cameras for
  transient chemilluminescenec imaging.
• Laser based sensing
• Elastic Scattering Mie/Rayleigh, OCT, we are
  developing multicolor lasers and novel setups for
  improved non-intrusive sensing on particulates
  and submerged tissues.
• LIDAR using FM spectroscopy, Isotope NDIR, we are
  developing sensors that could are setting a
  record in sensing distance using FM spectroscopy
  technique
• Inelastic scattering RAMAN, LIF, we are
  developing several setups for high temperature
  and pressure RAMAN and LIF sensing.

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Adsorption type sensors

• Low cost to manufacture
• e. g. polymer, electrolyte
• Easy to be tuned for different chemicals
• Vulnerable to baseline drifts caused by
  temperature variations
• Our solution --- fast sniffing process (patented)
  and realized through MEMS technology

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Adsorption sensorsHow do they work?
Sniffing redefines the baseline on a faster time
scale (seconds or faster)
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Hyperspectral imaging

• Narrow filter on each pixel corresponding to each
  chemical species color
• Each pixel captures different species color and
  use RGB algorithm for reconstructing chemical
  image

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Planar Laser Induced Fluorescence (PLIF) imaging

• Develop high power UV pulsed lasers solid state
  high power UV lasers (e.g. up to 40mJ at 226nm)
  for NOx PLIF
• Understanding the basic science of combustion
  dynamics --- close the loop (collaboration with
  AirFluidics)

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Multiwavelength Light Scattering

• Featuring unique Multi-wavelength (from UV,
  Visible to IR) laser scattering
• Easy deployment strategy --- multiwavelength
  lasers reduces the need for wide angle detection

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Multiwavelength laser scattering microscope

• Featuring unique Multi-wavelength laser
  scattering
• Integrated with microscope to see and analyze
  particles with size close to or under optical
  resolution
• Tiny particles have fast changing scattering
  pattern under the microscope when the wavelength
  changes
• Already demonstrated the capability to see tiny
  particles

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Integration with Microscopy
Is light out of focus useless?
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Computer simulation fix 100nm diameter
Blue area is the microscope angular collection
region, which happen to be the fast changing part
as wavelength changes.
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Sensors for Power generation (2)

• We develop solid state high power UV lasers (e.g.
  up to 40mJ at 226nm) for NOx PLIF
• We develop chemical specific hyperspectral
  chemluminescence imaging sensors for transient
  species (CH, OH, etc.) imaging
• providing feedback control for combustion
• Works under high temperature

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Sensors Applications _at_ PEER

• For Power generation
• High temperature combustion sensing
• Large area CO2 LIDAR for carbon sequestration
• For Environmental protection
• CEM Particulate characterization
• Large area gas LIDAR
• For Energy exploration transportation
• Low cost HC sensors
• Isotope analysis
• For Research
• Multiwavelength Light scattering microscope
• Scattering Optical Coherence Tomography
• Microscopic LIF, RAMAN Laser Induced Break-down
  Spectroscopy (LIBS)

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Sensors for Power Generation

• Development of transient sensors for high
  temperature combustion process
• Reduce emission, Improve efficiency, lifetime
• Collaborators AirFluidics, Solar Power, United
  Technologies, GE, FEC Caltech

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Sensors for Online Particulate emissions

• Major Results
• Unique fast-gated (ns) CCD arrays and LD drivers
  for field deployment
• Field deployment underway at Alturdyne, Inc.
• Ultimate goal provide a unique easy to install
  online PM measurement instrument
• Project founded by DOE, Industrial collaborator
  Alturdyne, Inc.

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Large Area LIDAR for CO2 sequestration monitoring

• Featuring multi-beam LIDAR sharing the same light
  source
• Low cost and high availability using telecom
  light sources and optics
• Improved design to fight scintillation, using
  multiple launch beams
• Could be applied to monitor HCl, NH3, CO and H2O
• Founded by DOE
• More details about CO2 monitoring here