Metrological support to power measurements in the millimeter range

1975 ◽  
Vol 18 (9) ◽  
pp. 1357-1358
Author(s):  
A. N. Akhiezer ◽  
A. P. Sen'ko
Keyword(s):  
Metrological Support ◽  
Power Measurements

scholarly journals Improving the accuracy and metrological support of power meters in the frequency range from 37.5 to 178.6 GHz

Doklady BGUIR ◽  
2021 ◽  
Vol 19 (3) ◽  
pp. 81-88
Author(s):  
A. V. Gusinsky ◽  
M. M. Kasperovich ◽  
V. A. Bogush
Keyword(s):  
Mathematical Model ◽  
Metrological Support ◽  
Microwave Power ◽  
Frequency Range ◽  
Standard Equipment ◽  
Automated Measurements ◽  
Absorbed Power ◽  
Power Measurements ◽  
Reference Body ◽  
Manufacturing Stage

To satisfy the needs for metrological support of power measurements in the frequency range from 37.5 to 178.6 GHz, the device has been developed and designed for automated measurements, calibrations and verification  of  wattmeters  with high  accuracy  and  the  ability  to  adapt  to  various  types  of  devices  under investigation. This paper presents the composition, diagram andgeneral principle of the device. A description of the structure of isothermal calorimetric converters of autocompensation type with dry load and reference body, which are the basis of the device, is given. The implemented algorithms for converting and replacing microwave power with direct current power of the developed calorimetric wattmeters are presented. The measures taken at the manufacturing stage to minimize sources of measurement uncertainty are described. To assess the accuracy of  measuring  the  absorbed  power, a  mathematical  model  of  the  conversion  factor  has  been  compiled. Corrections  have  been  introduced into  this  mathematical  model  to  improve  the  measurement  accuracy  of  the reproducible  microwave  power.  The  obtained  basic  metrological  and  technical  characteristics  of  calorimetric wattmeters  and  comparison  equipment  of  the  device  are  presented.  The  obtained  metrological  and  technical characteristics correspond to the current level of standard equipment.

ANALYZING POWER MEASUREMENTS FOR p-p ELASTIC SCATTERING AT HIGH-P⊥2

1985 ◽  
Vol 46 (C2) ◽  
pp. C2-303-C2-305
Author(s):  
R. S. Raymond ◽  
K. A. Brown ◽  
R. J. Bruni ◽  
P. R. Cameron ◽  
D. G. Crabb ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Power Measurements ◽  
Analyzing Power

Efficiency of application of the phase-chronometric method and neurodiagnostics for monitoring the degradation of rolling bearings during operation

2020 ◽  
pp. 43-50
Author(s):  
A.S. Komshin ◽  
K.G. Potapov ◽  
V.I. Pronyakin ◽  
A.B. Syritskii
Keyword(s):  
Life Cycle ◽  
Wavelet Analysis ◽  
Metrological Support ◽  
Rolling Bearing ◽  
Technical Condition ◽  
Measurement Information ◽  
Rolling Bearings ◽  
Vibration Diagnostics ◽  
Bearing Life ◽  
Alternative Approach

The paper presents an alternative approach to metrological support and assessment of the technical condition of rolling bearings in operation. The analysis of existing approaches, including methods of vibration diagnostics, envelope analysis, wavelet analysis, etc. Considers the possibility of applying a phase-chronometric method for support on the basis of neurodiagnostics bearing life cycle on the basis of the unified format of measurement information. The possibility of diagnosing a rolling bearing when analyzing measurement information from the shaft and separator was evaluated.

Neural Network Ensemble Approach to Pushed Convoys Dispatching Problems

2020 ◽  
Vol 27 (1) ◽  
pp. 70-82 ◽  
Author(s):  
Aleksandar Radonjić ◽  
Danijela Pjevčević ◽  
Vladislav Maraš
Keyword(s):  
Neural Network ◽  
Decision Support Tool ◽  
Primary Objective ◽  
Danube River ◽  
Decision Making Process ◽  
Neural Network Ensemble ◽  
Support Tool ◽  
Shipping Company ◽  
The Republic ◽  
Power Measurements

AbstractThis paper investigates the use of neural networks (NNs) for the problem of assigning push boats to barge convoys in inland waterway transportation (IWT). Push boat–barge convoy assignmentsare part of the daily decision-making process done by dispatchers in IWT companiesforwhich a decision support tool does not exist. The aim of this paper is to develop a Neural Network Ensemble (NNE) model that will be able to assist in push boat–barge convoy assignments based on the push boat power.The primary objective of this paper is to derive an NNE model for calculation of push boat Shaft Powers (SHPs) by using less than 100% of the experimental data available. The NNE model is applied to a real-world case of more than one shipping company from the Republic of Serbia, which is encountered on the Danube River. The solution obtained from the NNE model is compared toreal-world full-scale speed/power measurements carried out on Serbian push boats, as well as with the results obtained from the previous NNE model. It is found that the model is highly accurate, with scope for further improvements.

scholarly journals Hybrid POF/VLC Links Based on a Single LED for Indoor Communications

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 254
Author(s):  
Juan Andrés Apolo ◽  
Beatriz Ortega ◽  
Vicenç Almenar
Keyword(s):  
Optical Power ◽  
Industrial Applications ◽  
Free Space Optics ◽  
Polymer Optical Fiber ◽  
Hybrid Fiber ◽  
Modulation Formats ◽  
Space Optics ◽  
Indoor Communications ◽  
Power Measurements ◽  
Good Agreement

A hybrid fiber/wireless link based on a single visible LED and free of opto-electronic intermediate conversion stages has been demonstrated for indoor communications. This paper shows the main guidelines for proper coupling in fiber/air/detector interfaces. Experimental demonstration has validated the design results with very good agreement between geometrical optics simulation and received optical power measurements. Different signal bandwidths and modulation formats, i.e., QPSK, 16-QAM, and 64-QAM, have been transmitted over 1.5 m polymer optical fiber (POF) and 1.5 m free-space optics (FSO). Throughputs up to 294 Mb/s using a 64-QAM signal have been demonstrated using a commercial LED, which paves the way for massive deployment in industrial applications.

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