@ARTICLE{Grzelak_Stanisław_Ultrasonic_2014,
 author={Grzelak, Stanisław and Kowalski, Marcin and Czoków, Jarosław and Zieliński, Marek},
 number={No 2},
 journal={Metrology and Measurement Systems},
 pages={305-306},
 howpublished={online},
 year={2014},
 publisher={Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation},
 abstract={The ultrasonic flowmeter which is described in this paper, measures the transit of time of an ultrasonic pulse. This device consists of two ultrasonic transducers and a high resolution time interval measurement module. An ultrasonic transducer emits a characteristic wave packet (transmit mode). When the transducer is in receive mode, a characteristic wave packet is formed and it is connected to the time interval measurement module inputs. The time interval measurement module allows registration of transit time differences of a few pulses in the packet. In practice, during a single measuring cycle a few time-stamps are registered. Moreover, the measurement process is also synchronous and, by applying the statistics, the time interval measurement uncertainty improves even in a single measurement. In this article, besides a detailed discussion on the principle of operation of the ultrasonic flowmeter implemented in the FPGA structure, also the test results are presented and discussed},
 type={Artykuły / Articles},
 title={Ultrasonic Flow Measurement with High Resolution},
 URL={http://ochroma.man.poznan.pl/Content/90246/PDF/Journal10178-VolumeXXI%20Issue2_11.pdf},
 doi={10.2478/mms-2014-0026},
 keywords={ultrasonic flowmeter, time to digital converter, programmable logic device, time measurement},
}