SU686081A1 - Device for measuring signal carrier movement speed variations - Google Patents

Description

(54) DEVICE FOR MEASURING VIBRATIONS OF SPEED

MOTION OF THE ALARM CARRIER

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The invention relates to the field of trophic production. Nitrogen velocity measurement can be used. SRI Signogram in audio equipment.

Devices are known for initiating the carrier-carrier speed deviation, based on the sticking of the frequency deviation of the replayed signal. We have a natural wavelength and stay at the nominal value of this frequency with the help of the frequency discrimination.

The disadvantage of this device should be attributed to the relatively high accuracy of the conducted legends.

The closest to the invention by the technical essence is a device for measuring fluctuations of the speed of movement of a signal carrier, containing a frequency disk minator of the input signal, measuring and a switch 12.

However, this device has enough. exactly large measurement error.

The aim of the ecgregion is to reduce the measurement error.

This is achieved by supplying the device with a frequency power supply voltage discriminator and an adder, the output frequency discriminator of the input signal is connected to the first input of the adder, the output of the frequency discriminator of the voltage of the power supply is connected to the second input of the adder, the output of which is connected to the meter.

The drawing shows a block diagram of the described device. Frequency discriminator 1 of the input signal. Connected to the first input 2 of the adder 3, the output of the frequency discriminator of the power supply 4 through the switch 5 is connected to the second input 6 of the adder 3, the output of which is connected to the grid 7.

The device works as follows.

Claims (2)

When playing on the checked audio playback device (not shown on the black screen) of the waveform with the recording recording wavelength corresponding to the discriminator's tuning frequency, the signal from the output of this device is amplified to the required level and using the discriminator 1 is converted to a quasi-constant voltage, the value of which is proportional to the frequency deviation of the input signal from the nominal value. This voltage is fed to the input 2 of the adder. At the same time, the supply voltage enters the discriminator 4, is transformed into a quasi-constant voltage, the value of which is proportional to the frequency deviation of the supply network from its nominal value and through the closed contacts of the switch 5 is fed to the input 6 of the adder. The adder subtracts this voltage, selected by frequency discriminator 1, and the difference signal is fed to the input of meter 7, which is calibrated as a percentage of the deviation of the average speed of the signal from its nominal value. The b / w speed of the signal carrier of the device under test does not depend on the frequency of the mains supply, switch 5 releases the connection of the exact discriminator 3 to the input 6 of the adder, as a result of which the meter 7 receives a signal only from the discriminator nets do not have stacks. 1 The described device allows to significantly reduce the measurement error by eliminating the error caused by the frequency deviation of the supply network from the nominal value in devices where the speed of the signal carrier depends on the frequency of the power supply. Apparatus of the Invention A device for measuring fluctuations in the speed of a signal carrier, comprising an input signal frequency discriminator, a meter and an automatic reader, which is indicated by the fact that, in order to reduce the measurement error,. It is equipped with a power supply voltage discriminator and an adder. Historical information received at the attention of an expert 1.Patent Yapo11in No. 51-43342, cl. 98 (5) B 21, shubl. 1976 2.P daksyunna become; The device number D-EbO-ZhKRE number 6, 1977, p. 184 (prototype).