| 摘要 |
FIELD: measurement equipment.SUBSTANCE: usage: for measurement of acoustic resistance of homogeneous media. The substance of the invention consists in the fact that the device for measurement of acoustic resistance of homogeneous media comprises the first and second ultrasonic converters, designed for contact via the reference medium with surveyed and control media accordingly, the ultrasonic generator, the first and second outputs of which are accordingly connected to the first and second ultrasonic converters, the summing cascade, inputs of which are connected to the first and second ultrasonic converters, the divider and unit of functional transformation, connected to the output of the divider, at the same time the device comprises a differential amplifier and a unit of raising to power, besides, the first input of the differential amplifier is connected to the second ultrasonic converter, and the second input of this amplifier is connected to the first ultrasonic converter, the first input of the divider is connected to the output of the differential amplifier, and its second input is connected to the output of the summing cascade, the output of the divider is connected to the input of the unit of raising to power, and the output of the latter is connected to the input of the unit of functional transformation, besides, the unit of functional transformation realises the set functional dependence.EFFECT: increased sensitivity to acoustic resistance of surveyed medium.1 dwg |
