RU2012100923A - DEVICE FOR MEASURING ACOUSTIC RESISTANCE OF SOLID MATERIALS - Google Patents
DEVICE FOR MEASURING ACOUSTIC RESISTANCE OF SOLID MATERIALS Download PDFInfo
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- RU2012100923A RU2012100923A RU2012100923/28A RU2012100923A RU2012100923A RU 2012100923 A RU2012100923 A RU 2012100923A RU 2012100923/28 A RU2012100923/28 A RU 2012100923/28A RU 2012100923 A RU2012100923 A RU 2012100923A RU 2012100923 A RU2012100923 A RU 2012100923A
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Abstract
Устройство для измерения акустического сопротивления твердых материалов, содержащее первый и второй ультразвуковые преобразователи, предназначенные для контактирования через эталонную среду с исследуемым материалом и контрольной средой соответственно, ультразвуковой генератор, первый и второй выходы которого соответственно подключены к первому и второму ультразвуковым преобразователям, суммирующий каскад, первый вход которого подключен к первому ультразвуковому преобразователю, второй вход - ко второму ультразвуковому преобразователю, делитель, первый вход которого подключен к выходу суммирующего каскада, а второй вход - ко второму ультразвуковому преобразователю, а выход делителя связан с блоком функционального преобразования,отличающееся тем, что в него введена цепочка последовательно соединенных блоков: вычисления обратной величины, аналогового инвертирования и экспоненциального преобразования, включенных между выходом делителя и входом блока функционального преобразования, причем блок функционального преобразования реализует функциональную зависимостьгдеи- уровни его входного и выходного сигналов соответственно,- постоянный коэффициент, равный акустическому сопротивлению известной эталонной среды в выбранной физической системе координат, или в устройство введена цепочка последовательно соединенных блоков: вычисления обратной величины и экспоненциального преобразования, причем блок функционального преобразования реализует функциональную зависимостьобозначения те же.A device for measuring the acoustic resistance of solid materials, containing the first and second ultrasonic transducers, intended for contacting through the reference medium with the test material and the control medium, respectively, an ultrasonic generator, the first and second outputs of which are respectively connected to the first and second ultrasonic transducers, summing the cascade, the first the input of which is connected to the first ultrasonic transducer, the second input to the second ultrasonic transducer a divider, a divider, the first input of which is connected to the output of the summing stage, and the second input is connected to the second ultrasonic transducer, and the output of the divider is connected to the functional transformation unit, characterized in that a chain of series-connected blocks is introduced into it: inverse calculation, analog inversion and exponential transforms included between the output of the divider and the input of the functional transformation unit, and the functional transformation unit implements the functional dependent where the levels of its input and output signals, respectively, are a constant coefficient equal to the acoustic impedance of a known reference medium in the selected physical coordinate system, or a chain of series-connected blocks is introduced into the device: calculating the reciprocal of the value and the exponential transformation, and the functional transformation block realizes the functional dependence of the designation same.
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RU2012100923/28A RU2489687C1 (en) | 2012-01-11 | 2012-01-11 | Measuring device of acoustic resistance of solid materials |
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RU2012100923/28A RU2489687C1 (en) | 2012-01-11 | 2012-01-11 | Measuring device of acoustic resistance of solid materials |
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RU2012100923A true RU2012100923A (en) | 2013-07-20 |
RU2489687C1 RU2489687C1 (en) | 2013-08-10 |
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RU2012100923/28A RU2489687C1 (en) | 2012-01-11 | 2012-01-11 | Measuring device of acoustic resistance of solid materials |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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RU2564045C1 (en) * | 2014-03-25 | 2015-09-27 | Петр Османович Липовко-Половинец | Device to measure acoustic resistance of homogeneous media |
RU2564046C1 (en) * | 2014-03-26 | 2015-09-27 | Петр Османович Липовко-Половинец | Device to measure acoustic resistance of materials |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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SU1460623A1 (en) * | 1987-03-23 | 1989-02-23 | Ростовский научно-исследовательский онкологический институт | Method of determining acoustic resistance of materials with uneven surface |
SU1504602A1 (en) * | 1987-06-25 | 1989-08-30 | Ростовский научно-исследовательский онкологический институт | Method of measuring acoustic resistance of media |
SU1589197A1 (en) * | 1988-07-05 | 1990-08-30 | Ростовский государственный университет им.М.А.Суслова | Apparatus for measuring acoustic resistance of materials |
JP4633598B2 (en) * | 2005-10-27 | 2011-02-16 | 株式会社オーディオテクニカ | Acoustic resistance measuring device and method for adjusting acoustic resistance of acoustic tube using the same |
JP4712564B2 (en) * | 2006-01-18 | 2011-06-29 | 株式会社オーディオテクニカ | Acoustic resistance measuring device and method for acoustic resistance material |
RU2362128C1 (en) * | 2007-11-28 | 2009-07-20 | Государственное образовательное учреждение высшего профессионального образования "Южно-Российский государственный технический университет (Новочеркасский политехнический институт)" | Measurement method of homogenous media acoustic resistance and device for its implementation |
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