SU432527A1 - POSSIBLE-PERFORMANCE DEVICE - Google Patents

Description

one

The invention relates to the field of measurement and computing.

A device is known that uses the principle of pulse-width conversion for dividing and multiplying signals, in it the sources of divisible and divider signals are connected to the inputs of the adder and subtractor, the output of the adder is connected to one of the inputs of the first comparison circuit, the other input of which is connected to the output of the first sawtooth stress; the output of the first comparison circuit is connected to the first input of the trigger, the output of the subtraction unit is connected to one of the inputs of the second comparison circuit, the other input of which is connected to the output of the second sawtooth voltage generator; the output of the second comparison circuit is connected to the second input of the trigger, and the two outputs of the trigger are connected to the inputs of the sawtooth generator and to the input of the average value filter.

A disadvantage of this device is the dependence of its error on the degree of nonidentity of the conversion channels, respectively, on the sum and difference of the input signals and on the difference between the absolute values of amplitudes of different impulses, which appear at the output of the trigger. In addition, the device circuit is complex.

The purpose of this invention is to

uiro and enpe device diagrams n increase its accuracy.

According to invented nu, in the proposed multiplier-dividing device, the goal is achieved by connecting to the two inputs of the computation element, respectively, through the first key output ;, the divider signal source and through the factor setting element — the output of the divisible-first multiplier signal source. The output of the subtraction is through the integrator and connected to the inputs of two comparison elements reacting to the signals of different sizes. The outputs of the comparison elements are connected to the control inputs of the first key and the key established between the source of the dividend signal - the second factor and the average value filter input. After the filter, the device load is turned on.

Structural scheme of multiplying-divisive device; 1 depicted in the drawing.

The device contains the key y1 |: 1 / i, the element 2 of the coefficient of the power factor, which serves to change the range of measurable ratios, the subtraction element 3, the source; / divider signal and 5 divisible - IepBoro somno / kit, integrator 6,; 1, comparison element 7 and 8, another control key P, source 10 of the divisible signal - second somimate and filter 11.

The proposed device operates as follows.

With the open key / and the set factor in the element 2 of the coefficient setting in the subtraction element 3, the voltage difference between the sources of the divider and the dividend signal - the first factor, which after integration in integrator 6 and is input to the elements of comparison 7 and 8, is formed. until the setpoint of the element of comparison 7 is reached, the output of which at this moment io is a signal that guides the keys / and 9 to the closed position and holds them in it. Now the input of the subtraction element enters only the subtracted in the form of a voltage source 5 of the signal of the dividend - the first factor. The voltage from the output of subtraction element 3, integrating integrator 6 of B, and scares the input of elements of comparison 7 and 8. The voltage of the integrator decreases until it reaches the level of comparison of the setting of element of comparison 8, the output of which is at that moment A signal that guides the keys 1 and 9 to the open position and holds them in it. The process then repeats.

Key 9 is installed in the source of the source 10 of the signal of the dividend - the second factor. At the input of the filter // monolithic rectangular voltage emulsions with an amplitude equal to the signal source 10 are formed. Using the filter // from this sequence of emulsions, a constant voltage component is obtained that is directly proportional to the signal power of the signal sources 5 and 10 and vice versa to the voltage of the signal source 4. If necessary, the input signals can be used instead of the voltage of the currents.

The mathematical basis of the operation of the device is as follows.

There are three input signals, and for example, in the form of voltages Ui, U and 1/3, which do not change during the time required for the measurement. A difference is obtained between a gain of 1/1 and a voltage proportional to the gain of U, U - KUz, where K is the coefficient of occupationality.

The resulting difference is integrated over a period of time until its integral is changed by an amount equal to the difference in voltage between the settings t / oi and f / 02 of both comparison circuits. Thus, the integration time

  o2

and, - ki.,

Then, only the signal in the form of a gain / is integrated (2 BEFORE those until its integral is changed by the magnitude of the voltage (Ut-ich). This is the integration time.

and

and.

61

- neither.

Then the interactions are repeated.

At the same time, rectangular unipolar pulses are formed with an amilitude equal to nair bz, the duration of which is equal to T a and the gaps between them are T2. The mean value of this and the sequence of imiuls Z, which is equal to

7-n-

L /

Substituting the values of TI and T2, we get

From the expression obtained it can be seen that the output value does not depend on the difference between the settings of the comparison circuits, if this difference is unchanged at the time of measurement.

Subject invention

A multiplier-separator device containing a subtraction element, an integrator, two comparison elements, control keys and a filter, characterized in that, in order to simplify the design of the device and improve its accuracy, the first input signal source is connected via one of the first subtractor keys , another input of the subtraction element through the coefficient setting element is connected to the second input source, and the output through the integrator is connected to the inputs of the comparison elements, the outputs of which are connected to the input equaling inputs of the first and second keys, the second input of the last key is connected to the third signal source, and the output through the filter is connected to the output terminal of the device.

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