Zobrazeno 1 - 10
of 20
pro vyhledávání: '"A. M. Enyakov"'
Publikováno v:
Measurement Techniques. 62:989-995
The special features of the implementation and the main sources of measurement uncertainty of the power of an ultrasound beam in water are examined by the method of plane scanning of the cross-section of a beam. The methods of evaluating the effect o
Publikováno v:
Measurement Techniques. 60:403-410
The results of international pilot comparisons in the field of measurements of ultrasonic power in water are analyzed. The comparisons were made on the state primary standards of the Russian Federation (VNIIFTRI) and Ukraine (DP NDI Sistema) in 2014
Autor:
A. M. Enyakov
Publikováno v:
Measurement Techniques. 59:303-309
Methods are considered for measuring the parameters of ultrasonic contact lithotripters with waveguide ends executing low-amplitude longitudinal vibrations. A method is proposed for measuring vibration acceleration, vibration velocity, and the range
Autor:
A. M. Enyakov
Publikováno v:
Measurement Techniques. 57:838-844
An analysis of the results of international key comparisons in the area of measurements of the power of ultrasonic radiation in water conducted under the aegis of the International Bureau of Weights and Measures in 1999–2002 and 2009–2013 is pres
Autor:
A. M. Enyakov
Publikováno v:
Measurement Techniques. 49:1151-1156
Methods and instruments are considered for measuring the parameters of the acoustic output from a Doppler ultrasonic detector for fetal heartbeat frequency as corresponding to the specifications of international and national standards.
Autor:
Justin Ablitt, Stephen P. Robinson, Joseph F. Zalesak, Robert M. Drake, Dieter Krüger, Christopher John A. Purcell, A. Lee Van Buren, Alexander M. Enyakov, Alexander Isaev, Wang Yue-bing, Peter M. Harris, Zhang Yue, Zhu Houqing, Gary Hayman, Alex D. Thompson, Pierre Botha
Publikováno v:
The Journal of the Acoustical Society of America. 120:1366-1373
A description is given of the results of a Key Comparison of primary free-field standards for underwater acoustics at frequencies from 1 to 500kHz. This is the first such Key Comparison exercise in the field of underwater acoustic calibration and mea
Autor:
A. M. Enyakov
Publikováno v:
Measurement Techniques. 49:203-210
Work is considered for creating a national standard for the unit of ultrasonic power in water and its construction, metrological characteristics and the results of key international comparisons are provided.
Publikováno v:
Measurement Techniques. 47:744-748
The Russian and the Chinese Underwater Pressure National Standards in the frequency range 0.01 Hz to 1 Hz were compared by exchanging hydrophones and the results of calibration. The reproducibility of the calibration results confirmed the high-level
Publikováno v:
Measurement Techniques. 43:551-557
Russian and Chinese national standards have been compared by exchanging hydrophones for calibration in the frequency range from 1 Hz to 630 kHz. The results agree very closely, which confirms that the estimates made of the errors in the two standards
Autor:
A. M. Enyakov
Publikováno v:
Measurement Techniques. 43:804-809
Metrological aspects are considered in the design and use of means for checking and testing medical ultrasonic diagnostic equipment.