SU781965A1 - Device for indication of voltage shape in recording system - Google Patents

Description

(54) DEVICE FOR INDICATION OF FORMS OF VOLTAGE IN THE RECORDER

one

The invention relates to instrumentation, namely, devices for indicating the voltage form in the recorder, which can be used both in memory devices and in other installations where it is necessary to have information about the quality of the voltage form.

A device is known in which, knowing the power consumed by the installation, it is possible to indirectly determine the power losses in the common circuit, for which it is necessary to subtract the total power consumption from the electrical data of the common circuit. Then, knowing the design data of the circuit for power and the remainder of the subtraction, a part of the loss can be attributed to the distortion of the voltage form 1.

However, this path, which is laborious and time consuming, does not allow an objective judgment of the quality of the form of stress.

The closest to the present invention is a device for indicating the voltage form in the recorder, consisting of a series-connected input terminal, an amplifier with an adjustable gain (URKU), a valve, a high-pass filter (HPF), a quadratic detector and a recorder, as well as a reference source voltages connected through a comparison circuit

5 to the second input of the amplifier (URKU) 2. However, in this device, the t-accuracy of the indication of the voltage form is not high enough; moreover, the detector of average values is relatively

10 is complicated to set up, which increases the cost of setting up the device and complicates it.

The purpose of the invention is to improve the accuracy of display voltage

15 and simplify the assembly process and device configuration.

The goal is achieved due to the fact that the device is equipped with a low-pass filter included

20 between the second input of the comparison circuit and the output of the zentil, while the amplifier with an adjustable gain factor is connected directly to the input of the valve.

25 The drawing shows a block diagram of the proposed device.

URKU 1 is connected via a comparison circuit 2 to a source 3 of a reference buckle load and to a filter 4 of the lower .ch30 .stock (LPF), whose input is connected

with the output of the valve 5, which is connected in series with the HPF 6 and the quadratic detector 7 to the recorder 8. URKU 1, the comparison circuit 2, the source 3 of the reference voltage, the low-pass filter 4 and the valve 5 form the scale converter 9.

The device works as follows. : - - - -; -

During the operation of the device, the articulated feedback, consisting of low-pass filter 4 and comparison circuit 2, is enabled. And since the signal passes through the valve 5 and at the same time, the amplifier 1 has an adjustable gain factor, the signal at the output of this amplifier will be proportional to the ratio of the input alternating voltage to the average value of the same voltage. As a result, a voltage is generated at the output of the large-scale converter, which will not sustain from the previously existing errors introduced mainly by the valve 5. And then it fits | Zhenya will be proportional to the modulus of the relationship of the input to its ideal mean value. But here it is necessary to take into account that the voltage at the output of the scale conversion of the atoms in the subvolume to the whole contains a constant and variable components, which are generally summed up. At the same time, the constant component can be equal to the voltage / voltage value and it is the voltage of the output signal from filter 4, while the filter b outlines the alternating voltage}, which later enters the quadratic detector 7, the voltage on the output of which is equal to the square of the current value of the variable component voltage. It should be noted that the square of the effective value of the alternating voltage containing the constant and variable component of the gas is equal to the sum of the squares of the constant component (i.e. the square of the average value) and the effective value of the variable components. And then it turns out that the recorder 8 measures or registers, in known ways, a value proportional to the square of the voltage form factor.

The proposed device is sufficiently simply designed and does not place high demands on the accuracy of the attack, which reduces labor costs and indirectly saves energy.

Claims (2)

1. Author's certificate of the USSR 282699, cl. G 11 V 27/36, 05.30.69. 2.Assignment of the USSR on application 2617269 / 18-10, cl. G 01 R 19/00, 29.05.78 (prototype).