Science, technologies, innovations (STI) № 2(2) 2017, 64-69 p

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Rishan O. Y. – PhD in Engineering, Associate Professor, National University of Food Technologies, 68, Volodymyrska Str., Kyiv, Ukraine, 01601; +38 (044) 546-59-08; rishan.aleksandr@gmail.com

Hura A. S. – graduate student, NUFT, 68, Volodymyrska Str., Kyiv, Ukraine, 01601; miss.gurochka@mail.ru

DEVELO PMENT OF THE BLOC K DIAGRAM AND METHOD IM PROVE THE ACCURACY OF ULTRASONIC MEASUREMENT DEVICE CONTROLS THE WIDTH OF THE TA PE IN THE AIR

Abstract. The results of the study design and method of improving measurement accuracy in implementing the shadow ultrasonic method in width tape machines semis in the air. The feature of using the shadow method in the air is not isolated acoustic zones of primary measuring converters with (PVPSH) device from the environment and therefore the impact of the environment on the area of measurement, which appears to change the intensity of ultrasonic vibrations on the measuring receiver at a constant width tapes and
correspondingly change the output signals of the receivers and increase measurement error. Estimated additional components of error: random fluctuation error that occurs when changing the speed of air flow (turbulence) in the area of acoustic measuring tape edge and position error from the effects of temperature changes in the area of acoustic measurements. To reduce the additional components of basic error measurement method developed at the informal way of compensation, implemented in PVPSH device using an optional receiver adjustments, which is located next to the measuring receiver and in the same plane with him, but that does not overlap the edge of the tape, and the introduction of this additional receiver signal chain to negative feedback regulation voltage package radiators, so the signal is maintained constant and equal to the set.

Keywords: shadow ultrasonic method of measuring the width of the tape in the air, no acoustic isolation zones measurement of the environment, Additional components of the basic error of measurement, Receiver adjustment.

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