Naslov
A digital tachometer for high-temperature telemetry utilizing thermally uprated commercial electronic components

Autori
Ambruš, Davorin ; Bilas, Vedran ; Vasić, Darko

Izvornik
IEEE transactions on instrumentation and measurement (0018-9456) 54 (2005), 4; 1361-1365

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
fluid flow measurement; petroleum industry; high-temperature electronics; thermal uprating; tachometers; telemetry; quadrature pulse decoding; method of dependent count

Sažetak
The high-temperature environment of an oil well requires reliable downhole instrumentation, typically based on simple and robust circuits, low power consumption and smart measurement algorithms. In this paper, we present an electronic design and measurement methodology for a simple microcontroller-based digital tachometer, optimized for downhole spinner-flowmeter applications and multichannel telemetry. We have developed and experimentally evaluated an effective algorithm for direction-sensitive rotational speed measurement, which combines quadrature pulse decoding with the method of dependent count. The algorithm employs a temperature compensation technique, making it suitable for the high-temperature application of commercial-grade electronic parts. Our results confirm the functionality and reliable operation of the tachometer, targeted at high-temperature, short-term oil-well logging applications.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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