Results 251 to 260 of about 105,168 (294)

Calibration Gases for Automotive Emission Testing

SAE Technical Paper Series, 1978
<div class="htmlview paragraph">Calibration gases are an essential element of pollution measurement. Their importance is emphasized because calibration errors are translated directly to the measured data.</div> <div class="htmlview paragraph">The concept of a calibration gas department responsible for filling the needs of all exhaust ...
J. F. Antonette, D. R. Strain
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Transient Calibration on the TestBed for Emissions and Driveability

SAE Technical Paper Series, 2001
<div class="htmlview paragraph">This paper describes the development of a transient engine test facility for drive cycle simulation and emissions and performance testing.</div> <div class="htmlview paragraph">Results are presented to demonstrate correlation with vehicle tests performed on chassis rolls.
R. E. Dorey, J. D. McLaggan, J. M. S. Harris, D. P. Clarke, B. A. C. Gondre   +4 more
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Multisignal calibration in optical emission spectroscopy

Fresenius' Journal of Analytical Chemistry, 1993
The possibility of using more than one line for calibration in optical emission spectroscopy has been investigated. By means of principal component regression, sensitivity can be increased and part of noise can be removed. Thus, lower limits of detection can be obtained.
Klaus Danzer, Michael Wagner
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Absolute Calibration of an Acoustic Emission Sensor

2011
Calibrated sensors are essential for quantitative comparisons of acoustic emission source mechanics. We describe experimental techniques and mathematical models for implementation of an absolute sensor calibration scheme using glass capillary fracture and ball impact, two sources which can be easily implemented.
G. C. Mclaskey, S. D. Glaser
openaire   +1 more source

New Methods for Emission Analyzer Calibrations

SAE Technical Paper Series, 1999
<div class="htmlview paragraph">Traditionally, vehicle emission testing has used non-intelligent analyzers to meet government-regulated standards. Typically, these instruments would provide a 0 to 5-volt signal to a central test cell computer which would then handle all calibrations including analyzer linearization, zero and span corrections ...
Christopher Megdanoff, Mark Beaudoin, Rick Middleton   +2 more
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A Calibration Source for Acoustic Emission Analysis

1991
Acoustic emission produced by the fracture of boron particles in 2219 aluminum during tensile deformation was measured and characterized. The boron particles were introduced into the aluminum using a powder metallurgy approach. The response of an rms voltmeter to individual acoustic emission bursts was found to be proportional to the energy of the ...
CR Heiple, SH Carpenter, SS Christiansen
openaire   +1 more source

The influence of the spectral emissivity of flat-plate calibrators on the calibration of IR thermometers

AIP Conference Proceedings, 2013
Flat Calibrators (FC) are an option for calibration of infrared thermometers (IT) with a fixed large target. FCs are neither blackbodies, nor gray-bodies; their spectral emissivity is lower than one and depends on wavelength. Nevertheless they are used as gray-bodies with a nominal emissivity value.
D. Cárdenas-García, E. Méndez-Lango   +1 more
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Calibration of a fugitive emission rate measurement of an area source

Journal of the Air & Waste Management Association, 2013
A major challenge to measuring fugitive emission rates from large area sources, such as landfills or tailings ponds, has been the establishment of the accuracy of such methods, or of a particular measurement. When such measurements are carried out, they are invariably associated with a relatively high degree of uncertainty. The Airborne Matter Mapping (
Colin L Y, Wong, Jeffrey, Ramkellawan
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Stress-Sensing Nanomaterial Calibrated with Photostimulated Luminescence Emission

Nano Letters, 2011
Calibration of high spatial resolution stress-sensing alumina-epoxy nanomaterials is presented. The piezospectroscopic property of luminescent chromium-doped alumina nanoparticles embedded as "nano-sensors" in epoxy-based materials is the basis for the stress sensing capabilities.
Stevenson, Amanda, Jones, Ashley, Raghavan, Seetha   +2 more
openaire   +3 more sources

Spectral Emissivity of Surface Blackbody Calibrators

International Journal of Thermophysics, 2007
The normal spectral emissivity of commercial infrared calibrators is compared with measurements of anodized aluminum samples and grooved aluminum surfaces coated with Pyromark. Measurements performed by FTIR spectroscopy in the wavelength interval from 2 to 20 μm and at temperatures between 5 and 550°C are presented with absolute uncertainties from 0 ...
openaire   +1 more source