scholarly journals Radiation Transmission-based Thickness Measurement Systems - Advancements, Innovations and New Technologies

10.5772/8728 ◽  
2010 ◽  
Author(s):  
Mark E.
Keyword(s):  
New Technologies ◽  
Thickness Measurement ◽  
Measurement Systems ◽  
Radiation Transmission

Temperature Measurement System for Low Pressure Ratio Turbine Testing

2003 ◽  
Author(s):  
R. Va´zquez ◽  
J. M. Sa´nchez
Keyword(s):  
Temperature Measurement ◽  
Measurement System ◽  
High Speed ◽  
New Technologies ◽  
Pressure Ratio ◽  
Low Pressure ◽  
High Accuracy ◽  
Single Stage ◽  
Measurement Systems ◽  
Temperature Measurement System

In 1999, ITP (Industria de Turbopropulsores, S.A.) launched a wide on-going research program focusing on new technologies to provide significant improvements in Low Pressure Turbines cost and weight. As consequence of the new technologies the experience limits are exceeded and new unknown concepts, like high stage loading turbines, must be explored and then a wide experimental work is required for validation purposes. Cold flow single stage rigs in high-speed facilities were selected by ITP as main vehicle to carry out the experimental validation. Single stage Low Pressure Turbine rigs have low-pressure ratio and power consumption, therefore efficiency predictions based on temperature drop require high accuracy thermocouple measurement systems (precision uncertainties lower than ±50 mK), if small efficiency variations must be captured. In this paper, a detailed uncertainty analysis is introduced and a temperature measurement system that allows achieving such high measurement accuracy is evaluated and described. Type T thermocouples are proposed for use in the range 0°C to 80°C, which are individually calibrated. The procedure followed for this calibration is presented and how is possible to achieve a precision of 30 mK. It is also shown as conventional UTR based on metal plates can behave as good as thermal baths in terms of temperature uniformity and errors, with the adequate isolation and temperature reference calibration. The conventional data recording and voltage measurement systems are experimentally evaluated, and they are found as main source of temperature errors. Although following some recommendations the precision of those systems can be improved, it is experimentally probed and therefore suggested the use of high accuracy voltmeter with a commutation unit to reduce significantly the temperature uncertainty. Finally a miniature Kiel Shroud is proposed and aerodynamically characterised in a high-speed facility. Mach, Reynolds number, yaw, blockage and manufacturing tolerance impact on recovery factor can be inferred from those results.

scholarly journals New Technologies For Measurement Systems Distributed On A Wide Area

10.5772/8721 ◽  
2010 ◽  
Author(s):  
Giovanni Bucci ◽  
Fabrizio Ciancetta ◽  
Edoardo Fiorucci
Keyword(s):  
New Technologies ◽  
Wide Area ◽  
Measurement Systems

Verification of Wave Measurement Systems

2013 ◽  
Vol 47 (5) ◽  
pp. 104-116 ◽  
Author(s):  
Mark E. Luther ◽  
Guy Meadows ◽  
Earle Buckley ◽  
Sherryl A. Gilbert ◽  
Heidi Purcell ◽  
...  
Keyword(s):  
Shallow Water ◽  
Water Wave ◽  
New Technologies ◽  
Reference Method ◽  
Army Corps ◽  
Intermediate Water ◽  
Measurement Systems ◽  
Test And Evaluation ◽  
Wave Measurement ◽  
Wide Range

AbstractGiven the societal importance of reliable and accurate ocean observations, the wave monitoring community (including academic researchers, agency scientists, resource managers, and representatives from wave instrument manufacturers) came together to develop a set of protocols for the test and evaluation of wave measurement systems in support of the 2009 National Operational Wave Observation Plan. These protocols are focused on a wide range of wave measurement instruments and their respective performance in successfully recovering the “First-5” Fourier components of the incident wave field. Performance is determined by comparing each system’s output with a verifiable reference method over a predetermined range of wave frequencies. It is recommended that permanent wave test facilities are created on the West Coast (Monterey Bay, CA—deep water) and the East Coast (Duck, NC—shallow water) for continued evaluations of existing and new technologies. It was recognized that no absolute standard exists for the determination of the “First-5” across all spatial domains. Therefore, it was agreed that the Directional Waverider DWR-MkIII system was the best available reference/standard for the deep and intermediate water wave evaluations as verified by the laser array (LASAR) at the ConocoPhillips Ekofisk offshore platform complex in the North Sea. The long linear array at the U.S. Army Corps of Engineers’ Field Research Facility could be used as the standard for shallow water wave evaluations. Finally, given the significance of wave measurements, an appropriate level of quality assurance and quality control procedures must be included as part of any test and evaluation effort. The details of the proposed protocols for the verification of wave measurement systems are described.

A comparison of two distributed large-volume measurement systems: The mobile spatial co-ordinate measuring system and the indoor global positioning system

2009 ◽  
Vol 223 (5) ◽  
pp. 511-521 ◽  
Author(s):  
D A Maisano ◽  
J Jamshidi ◽  
F Franceschini ◽  
P G Maropoulos ◽  
L Mastrogiacomo ◽  
...  
Keyword(s):  
Global Positioning System ◽  
Large Volume ◽  
New Technologies ◽  
Volume Measurement ◽  
Measuring System ◽  
Full Potential ◽  
Positioning System ◽  
Measurement Systems ◽  
Global Positioning ◽  
Two Systems

Advances in the area of industrial metrology have generated new technologies that are capable of measuring components with complex geometry and large dimensions. However, no standard or best-practice guides are available for the majority of such systems. Therefore, these new systems require appropriate testing and verification in order for the users to understand their full potential prior to their deployment in a real manufacturing environment. This is a crucial stage, especially when more than one system can be used for a specific measurement task. In this paper, two relatively new large-volume measurement systems, the mobile spatial co-ordinate measuring system (MScMS) and the indoor global positioning system (iGPS), are reviewed. These two systems utilize different technologies: the MScMS is based on ultrasound and radiofrequency signal transmission and the iGPS uses laser technology. Both systems have components with small dimensions that are distributed around the measuring area to form a network of sensors allowing rapid dimensional measurements to be performed in relation to large-size objects, with typical dimensions of several decametres. The portability, reconfigurability, and ease of installation make these systems attractive for many industries that manufacture large-scale products. In this paper, the major technical aspects of the two systems are briefly described and compared. Initial results of the tests performed to establish the repeatability and reproducibility of these systems are also presented.

scholarly journals Macro Level Measuring of Organization Legitimacy: Its Implication for Open Innovation

2021 ◽  
Vol 7 (1) ◽  
pp. 53
Author(s):  
Adrián López-Balboa ◽  
Alicia Blanco-González ◽  
Francisco Díez-Martín ◽  
Camilo Prado-Román
Keyword(s):  
New Technologies ◽  
Organizational Legitimacy ◽  
Macro Level ◽  
Measurement Systems ◽  
Show Evidence ◽  
Micro Level ◽  
Processing Techniques ◽  
The Relationship ◽  
Different Sources ◽  
Mass Information

Although the field of organizational legitimacy is undergoing great advances, academics are still facing the challenge of its measurement. Currently, academics are focusing on improving and homogenizing legitimacy measurement systems at the micro level. However, measuring legitimacy at the macro level has not evolved according to the needs and possibilities provided by new technologies. This research aims to develop a new methodology to measure organizational legitimacy at the macro level, capable of processing large amounts of information. To this end, an analysis of the news content of the 50 companies that make up the EuroStoxx50 has been conducted for a full year. By doing so, we make three key contributions to managing organizational legitimacy. First, we provide a more complete and reliable measurement of organizational legitimacy thanks to mass information processing techniques, providing a technology-based solution to the obsolescence problem of legitimacy evaluation models at the macro level. Second, we provide empirical evidence of the relationship between legitimacy and organizational success based on the analysis of mass information. Third, we show evidence that a bias is introduced in the measurement of legitimacy due to the use of different sources for this purpose.

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