28/03/2024
Synchronous Full-Field Strain and Temperature MeasurementHigh temperature is a critical concern for most testing in the automotive, aerospace, and energy industries. Thermal expansion is an ever-present challenge, often making it difficult to distinguish strains caused from mechanical load from those originating solely due to material temperature change. Moreover, material deformation and its surface temperature change are strongly coupled because...
28/03/2024
Remote Estimation of Sulfur Content in Fuel from SO2 Quantification from Ship Exhaust PlumeSulfur oxide (SOx) from seagoing ships contribute to local air pollution in cities and coastal areas around the world. Sulfur dioxide (SO2) emissions in particular, are a precursor to acid rain and atmospheric particulates leading to ocean acidification which can contribute to negative human health outcomes. The International Convention for the Prevention of Pollution from Ships (MARPOL) def...
28/03/2024
Airborne Thermal Infrared Hyperspectral Imaging for Mineral Mapping and Urban Heat Island CharacterizationMinerals such as quartz, silicates, aluminosilicates (feldspar), magnesium silicates (serpentine) and olivines are among the most commonly encountered in the environment. Airborne mineral mapping of these minerals using conventional visible-near infrared (VNIR, 0.4-1.4 μm) and shortwave infrared (SWIR, 1.4-3 μm) sensors can be very challenging since the Si-O bounds are featureless or exhibit...
28/03/2024
Space Probe Fluid DynamicsInfrared camera mounted on a fast trajectory tracker system was used to capture infrared imagery of a model space probe travelling at supersonic velocities. In addition to the laminar-to-turbulent transition boundary, the infrared camera was able to detect shock waves and present a time dependent view of the flow field. Readily available infrared technology has the capability to provide deta...
28/03/2024
Using High-Speed Infrared Cameras to Study Fire SpreadScientists have developed several theoretical models to better understand and predict various aspects of wildfire behaviour. However, the lack of experimental data from real wildfire renders the validation of the models difficult and thus limits their applicability. More validation data would enable a better characterization of the valid boundaries within which the models can be applied. The...
28/03/2024
Thermal Infrared Hyperspectral Imaging of Methane Landfill EmissionsMethane (CH4) and carbon dioxide (CO2) are landfill gases (LFG) originating from the decomposition of organic material as encountered in landfill areas. Both gases are considered greenhouse gases due to their high propensity for absorbing and emitting infrared radiation. For this reason, landfill installations are often equipped with wells and pumping systems to collect these LFGs. Depending...
28/03/2024
Using High-Speed Infrared Cameras for Fire Turbulence MeasurementsWildfire spreads by pre-heating unburnt fuels (vegetation) using a combination of radiative and convective heating processes. In rapidly spreading grass or stubble wheat fuels, turbulent wind flow aids to intermittently convect the heat produced by combustion onto the unburnt fuels leading to its ignition and fire spread. In a way, the fire is sustaining its motion, but the role of atmospher...
28/03/2024
Measurement of Supersonic Micron Size Cold Spray ParticlesThe extraction of both velocity and temperature of particles during the cold spray (CS) process using a high-speed, high-definition infrared (IR) camera was demonstrated by Nastic, A. & Jodoin, B.1. Following the success of this project, Telops worked with the University of Ottawa to address the challenges of measuring the speeds and temperatures of smaller cold spray particles (as small...
28/03/2024
Measurement of Gas Temperature and Concentration Profiles Resulting from Detonation of TNT Using High Speed Hyperspectral CameraThe measurement of physical properties of expanding gases in the infrared region following a high-explosive detonation requires cameras having both high framerate and fine spectral resolution. Moreover, an accurate gas model is required to adequately explain and quantify the rapidly-evolving events based on properly-interpreted gas emissivity signatures. To achieve this goal, a Telops MW Fas...
28/03/2024
Analysis of Ballistic Impacts on Composite Materials by Infrared Active ThermographyIn this study, we investigated the assessment of the damaged area on composites ballistic plates subjected to high velocity impact. The active pulsed thermography technique was used for performing post-mortem analysis of the impacted specimens. Quantitative analysis of the damaged areas shows consistent results with the size of the projectile suggesting high precision of the quantification d...
28/03/2024
Airborne Quantification of Methane LeaksSafety is a major concern for oil and gas companies as chemicals encountered in their installations can be toxic or presentSafety is a major concern for oil and gas companies as chemicals encountered in their installations can be toxic or presenta high explosion potential. A reliable gas identification and quantification imaging system represents an upgrade to thecurrent gas detection techno...
28/03/2024
Thermal Infrared Hyperspectral Imaging for Visualization and Flow Rates Quantification of Methane ReleasesGas leaks present obvious health, safety and environmental risks. In oil and gas companies for instance, constant monitoring is crucial to preserve on-site personnel security and to prevent damage to the installations. The need for a reliable and cost-efficient gas detection system is of prime importance especially when security-threatening situations like gas leaks and emissions occur. Prec...
28/03/2024
Thermal Infrared Hyperspectral Imaging for the Detection, Identification, and Quantification of Industrial Stack Gas EmissionsThermal infrared hyperspectral imaging is well suited for the detection, identification, and quantification of industrial stack gas emissions. This application note describes a measurement campaign performed at the Port of Rotterdam with the Telops Hyper-Cam, a commercial high-performance, FTIR-based hyperspectral imaging instrument. Principles of gas detection, quantification, and identific...
28/03/2024
Quantification of CO2 Passive Degassing at Sulphur Banks from Kilauea Volcano using thermal Infrared Multispectral ImagingVolcanic carbon dioxide (CO2) emission rates play an important role for assessing volcanic hazards and for constraining the role of magma degassing in the biogeochemical cycle of carbon. Quantification of CO2 emission rates from volcanoes remain challenging, mainly due to the difficulty of measuring volcanic CO2 against the high level of CO2 in the atmosphere. Thermal Infrared (TIR) imaging ...
28/03/2024
Multispectral Infrared Imaging for In-Process Monitoring of Welding OperationsThermal infrared imaging technology is well suited to monitoring the spatially-varying temperature gradients induced in fabricated metal parts during high-temperature welding processes. This application note demonstrates how Telops multispectral thermal infrared cameras can be used to monitor important welding process characteristics like melt pool geometry and local heating and cooling gradients.