Wyniki wyszukiwania - BazTech

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Analiza porównawcza zmierzonych i obliczonych natężeń pól elektrycznych od nadajników SFN DAB+

Zieliński Ryszard

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2022

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nr 4

612--615

PL

W artykule przedstawiono metodykę oraz wyniki pomiarów poziomu sygnału odbieranego w miejscach, w których potencjalnie będzie można zaobserwować zjawisko zaników interferencyjnych powodowanych przez sygnały nadawane przez nadajniki DAB+ sieci jednoczęstotliwościowej SFN (Single Frequency Network). Przedstawiono metodykę pomiarów, zastosowany sprzęt pomiarowy oraz uzyskane wyniki. Porównano je do wyników natężenia pola elektrycznego uzyskanych z predykcji przy użyciu metody propagacyjnej ITU-R 1546, która została w odpowiedni sposób zaimplementowana w Instytucie Łączności PiB we Wrocławiu.

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The article presents the methodology and measurement results of the received signal level in places where it will be possible to observe the phenomenon of interference fade caused by signals transmitted by DAB+ transmitters of the SFN (Single Frequency Network) network. The methodology of measurements, the measuring equipment used and the obtained results were presented. They were compared to the results of the electric field strength obtained from the prediction using the ITU-R 1546 propagation method, which was implemented at the National Institute of Telecommunications in Wroclaw.

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Investigation of electroluminophores for their practical application in optical fibre sensor technology

Pustelny T., Pustelny B.

Opto-Electronics Review

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2002

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Vol. 10, No. 3

193-198

EN

In this paper, the results of the experimental investigation of electroluminescent phenomena are presented. The electroluminescent effect is observed in some composite semiconductors, among others - ZnS, doped by Mn and Cu. The concentrations of impurities in good guality electrophosphores are higher than in photoluminophores and they are within the range of 10⁻⁴ - 10⁻³ g/g. The worked out electroluminophors were tested in the electric field of sinusoidally changeable intensity. The influence of electric field both on spectral characteristics and electroluminescence intensity was examined. The final aim of the tests is elaboration of electric intensity sensors which will be applied in monitoring of operation of electromagnetic power arrangements in the future.

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Optic Fiber Electric Field Intensity Sensor

Pustelny T., Pustelny B.

Molecular and Quantum Acoustics

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2000

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Vol. 21

201-206

EN

In this paper the results of the experimental investigation of fiber optic electric fieId intensity sensors are presented. These sensors are based on electroluminescent effect which consists in the light emission by some substances placed in variable electric field. The luminescent effect is observed in some composite semiconductors, among other - ZnS, doped by Mn, for high its concentration, order 10 -4 -- 10 -3 g/g. The final aim of this investigation will be the elaborafion ofan electric intensity sensor, which together fiber optic temperaturę sensors and intensive of magnetic field sensors make possible, in the future, to monitor the state ofwork of electromagnetic power arrangements, first ofall - high voltage power transformers.