The Experts below are selected from a list of 3744 Experts worldwide ranked by ideXlab platform
C Vazquez - One of the best experts on this subject based on the ideXlab platform.
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two color Pyrometer for process temperature measurement during machining
Journal of Lightwave Technology, 2016Co-Authors: A Tapetado, J Diazalvarez, M H Miguelez, C VazquezAbstract:A fast fiber-optic two-color Pyrometer operating on the optical communication bands is designed for temperature measurements in machining processes. Off-the-shelf low-loss fiber-optic demultiplexers and optoelectronics equipment are used in order to obtain a cost-effective sensing solution while reducing both the temperature measurement error and the minimum measurable temperature. The system is capable of measuring highly localized temperatures without using collimation lens. The designed Pyrometer allows measuring temperature in the range from 300 to 650 °C, achieving a full-scale temperature error as low as 4%. Factors influencing the temperature measurements are studied in order to identify the sensor limitations, such as a possible damage on the end of the optical fiber, the spectral loss attenuation and responsivity, or the distance between the fiber end and the target. Finally, this Pyrometer is applied in a turning process, using a fiber-optic sensor embedded on a standard tool holder. Temperature measurements on the Inconel 718 are reported showing a good agreement with the simulations.
Behzad Najafi - One of the best experts on this subject based on the ideXlab platform.
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temperature measurement in wte boilers using suction Pyrometers
Sensors, 2013Co-Authors: Fabio Rinaldi, Behzad NajafiAbstract:The temperature of the flue-gas in the post combustion zone of a waste to energy (WTE) plant has to be maintained within a fairly narrow range of values, the minimum of which is prescribed by the European Waste Directive 2000/76/CE, whereas the maximum value must be such as to ensure the preservation of the materials and the energy efficiency of the plant. A high degree of accuracy in measuring and controlling the aforementioned temperature is therefore required. In almost the totality of WTE plants this measurement process is carried out by using practical industrial thermometers, such as bare thermocouples and infrared radiation (IR) Pyrometers, even if affected by different physical contributions which can make the gas temperature measurements incorrect. The objective of this paper is to analyze errors and uncertainties that can arise when using a bare thermocouple or an IR Pyrometer in a WTE plant and to provide a method for the in situ calibration of these industrial sensors through the use of suction Pyrometers. The paper describes principle of operation, design, and uncertainty contributions of suction Pyrometers, it also provides the best estimation of the flue-gas temperature in the post combustion zone of a WTE plant and the estimation of its expanded uncertainty.
Roberto Della Ragione - One of the best experts on this subject based on the ideXlab platform.
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Methodology for spectral emissivity measurement by means of single color Pyrometer
Measurement: Journal of the International Measurement Confederation, 2016Co-Authors: Carlo Purpura, E Trifoni, Marilena Musto, Giuseppe Rotondo, Roberto Della RagioneAbstract:The application of non-intrusive optical devices, such as infrared Pyrometers able to measure the temperature of surfaces, makes possible the evaluation of emissivity curve of the tested materials at different temperature values. In this paper the authors propose a methodology for the spectral emissivity measurement by means of a single color Pyrometer providing a semi-empirical formula, obtained experimentally at CIRA's laboratory. The semi-empirical formula allows to know the actual emissivity value of the sample's surface for whatever emissivity value set up on the Pyrometer. The agreement between the experimental emissivity and the emissivity predicted by semi-empirical formula was verified.
Marek Szulim - One of the best experts on this subject based on the ideXlab platform.
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infrared Pyrometer for temperature measurement of objects emissivity of which depends on wavelength and time
Quantitative InfraRed Thermography, 1998Co-Authors: Zdzisław Bielecki, Krzysztof Chrzanowski, Robert Matyszkiel, T Piqtkowski, Marek SzulimAbstract:The multiband MBP 98A Pyrometer developed for non-contact temperature measurement of objects with unknown and wavelength-dependent emissivity has been presented in this paper. The Pyrometer was designed using single thermoelectrically cooled PbS detector of spectral band of 1-2.5 Ilm and 8 narrow-band optical filters. It enables temperature measurement of objects at temperature within a range of 500°C-1200°C and a speed of 75 Hz. It can be used for controlling various industrial-technological processes as well as in research works for testing of classic singleband Pyrometers in temperature measurement of objects whose emissivity depends on the wavelength and time. 1. Introduction
A Tapetado - One of the best experts on this subject based on the ideXlab platform.
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two color Pyrometer for process temperature measurement during machining
Journal of Lightwave Technology, 2016Co-Authors: A Tapetado, J Diazalvarez, M H Miguelez, C VazquezAbstract:A fast fiber-optic two-color Pyrometer operating on the optical communication bands is designed for temperature measurements in machining processes. Off-the-shelf low-loss fiber-optic demultiplexers and optoelectronics equipment are used in order to obtain a cost-effective sensing solution while reducing both the temperature measurement error and the minimum measurable temperature. The system is capable of measuring highly localized temperatures without using collimation lens. The designed Pyrometer allows measuring temperature in the range from 300 to 650 °C, achieving a full-scale temperature error as low as 4%. Factors influencing the temperature measurements are studied in order to identify the sensor limitations, such as a possible damage on the end of the optical fiber, the spectral loss attenuation and responsivity, or the distance between the fiber end and the target. Finally, this Pyrometer is applied in a turning process, using a fiber-optic sensor embedded on a standard tool holder. Temperature measurements on the Inconel 718 are reported showing a good agreement with the simulations.
