Search results for "spectral leakage"

showing 3 items of 3 documents

Quantitative thermoelastic stress analysis by means of low-cost setups

2020

Abstract A low-cost Thermoelastic Stress Analysis (TSA) experimental setup is proposed which uses an ordinary micro-bolometer and in-house developed signal processing scripts. The setup is evaluated by analysing the thermoelastic signal from a tensile and a SENT specimen made of stainless steel AISI 304L, and the bolometer performances are compared with those of a state of the art photon detector. Signal processing is based on off-line cross-correlation, using a self-reference signal which is retrieved from the acquired thermal data. Procedures are in particular developed to recognise, quantify and correct errors due to spectral leakage and loss of streamed frames. The thermoelastic signal …

Signal processingMaterials scienceMicro-bolometersAcoustics/dk/atira/pure/subjectarea/asjc/2500/2504/dk/atira/pure/subjectarea/asjc/2200/2208Crack-growth monitoringThermoelastic stress analysis02 engineering and technologyFatigue testing01 natural sciencesSignallaw.invention010309 opticsSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineThermoelastic dampingData acquisitionlaw0103 physical sciencesCalibrationElectrical and Electronic EngineeringSpectral leakageStress intensity factorSignal processing/dk/atira/pure/subjectarea/asjc/3100/3107Mechanical EngineeringBolometer021001 nanoscience & nanotechnologyAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsIR-thermography/dk/atira/pure/subjectarea/asjc/2200/22100210 nano-technology
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A low cost and easy re-configurable instrument for power quality survey

2004

In this document the development of a low cost and user friendly PC-based instrument for power quality measurement is proposed, according to IEC 61000-4-7 and standard IEC 61000-4-30. It is an easily re-configurable instrument able to measure harmonics, interharmonics and amplitude disturbances and supply unbalance. In order to verify its accuracy, the instrument has been tested according standard test procedures, by means of a built-up calibration test bench.

Measure (data warehouse)Total harmonic distortionEngineeringUser Friendlybusiness.industryElectromagnetic compatibilityDiscrete Fourier transformsReliability engineeringspectral leakageHarmonicsCalibrationElectronic engineeringPower qualityFrequency estimationbusinessVoltageProceedings of the 21st IEEE Instrumentation and Measurement Technology Conference (IEEE Cat. No.04CH37510)
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A PC-based instrument for harmonics and interharmonics measurement in power supply systems

2004

Abstract Growing interest on power quality has led international working groups to define new standards for testing and measurement techniques to apply to power systems. Special attention has been paid to harmonic and interharmonic measurements. Here, the authors introduce a PC-based instrument capable of synchronising sampling frequency with fundamental frequency in order to perform on-line voltage or current distortion analysis. The instrument has been developed in accordance with currently available standards and international documents, IEC 61000-4-7 Ed. 2002, IEC 61000-4-30 Ed. 2003, Draft Guide IEEE P1159.1 Ed. 2003 and limits given by IEC 61000 Part. 3. A detailed description of the …

Engineeringbusiness.industryApplied MathematicsElectrical engineeringFundamental frequencyCondensed Matter PhysicsDiscrete Fourier transformsPower (physics)spectral leakageElectric power systemHarmonicsElectronic engineeringHarmonicPower qualityFrequency estimationElectric powerElectrical and Electronic EngineeringbusinessInstrumentationVoltageMeasurement
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