SU1366946A1 - Device for field tests of building articles - Google Patents

Abstract

The invention relates to construction and mechanical engineering, in particular, to devices for controlling the quality of products by a resonant method. The goal is accuracy. In a device for field testing of building products, the receiving and radiating transducers are placed coaxially and form an acoustic negative feedback circuit with the product. Radiating and receiving transducers, a low-pass filter, an amplifier, a power supply and measuring and indication units are combined in a single housing made in the form of a horn. 1 il.

Description

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The invention relates to the builder-receiver and radiating transformation and engineering, namely, the mouth and the product form a chain of acoustic quality control of an artifact of negative feedback,

resonant method, the receiving transducer J membrane

The price of the invention is to increase the point-perception of product oscillations, and

back. - directly

The drawing shows a block diagram of the acoustic oscillations

The proposed device. Converter. Since the direction of the device contains the sequence of the arrival of acoustic oscillations

but connected receiving transform-from radiating transducer 5 and

body 1, preamplifier 2, filter 3, products 8 to receiver transducer amplifier 4, radiating 1Y transformer 1 opposite, corresponding

Tel 5, Radiation and Indication Unit 6 Electric Signals Formed

and a power supply unit 7. Position 8 shows 15 in the receiving transducer, an anti-test item. phasic.

The emitting and receiving transform-Signal, arising in the receiving

the tel, the low-pass filter, the amplifier against the acoustor, the power supply unit and the radiating oscillation unit of the pre-indication are combined in the same building-20 of the former, attenuating the oscillations

Ce 9, made in the form of a horn. the last. This provides a compensating device. The device works as follows: the measurement of the amplitude of the radiating-time converter

Claims (1)

When the device approaches the pin-change of the monitored product after the controlled product 8 at the moment of switching on the frequency error of the transducer, free oscillations of the recipient occur. This ensures the product. They are perceived as an acceptable increase in the measurement accuracy independent of the transducer 1 and are converted, from the monitored product, an electrical signal. This signal is fed to the input, Preamplifier 2, 30 The formula of the invention is a filter. 3 low frequencies, an amplifier 4, a device for field testing which feeds the radiating conversion-building products containing block 5. At the same time, the amplitude of the measurement and indication and the sequence-emitting converter are age-but-connected receiving transforming, respectively increasing the amplitude, preamplifier, filter, increased product natural oscillations. The optic and radiating transducer, a positive acoustic circuit is developed, characterized in that, with feedback, due to the accuracy of the tests, the Torah system goes into the self-receiving transducer mode and is excited not on its own (re. o- .40 inside the bell emitting convertible). frequency oscillating, calling and coaxial with it. TZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ u ////, inf) i V XX / S X-fll /) / eight ZZZZZZZZZZZZZZZZZZZZZZZZZZZ Z V XX / S X-fll /) /