SU591782A1 - Divider - Google Patents

Description

I:

The invention relates to devices for determining the ratio of two electric direct current voltages, can be used in automation and in measurement technology.

A separating device is known that contains comparators, a trigger, an integrator, and an amplitude modulator, and one of the comparators is connected to the output of a device by a variable signal source, the amplitude of which is equal to the first factor, the inputs of the other comparator are connected to alternating current signal sources, the amplitude of one of which is equal to the second factor, and the amplitude of the other is the divisor; Comparator outputs are connected to a trigger input that is connected via an integrator to an input of an amplitude modulator connected to an alternating voltage source, the oscillation frequency of all sources being the same, and the voltage phases of the second factor and divider are different from the output voltage phase and the first factor by some fixed angle lj.

In this device, in the case of an unstable frequency gig of the alternating current signal sources, an impulse sequence of an unstable frequency arrives at the integrator input from the trigger, which causes a change in the voltage at the integrator output at constant amplitudes of the input signals. This leads to an additional measurement error, constituting a significant part of the total error, due to the linear dependence of the voltage at the output of the HHTerjjaTopa on the frequency of the pulses.

Closest to the proposed dividing device, containing a series-controlled frequency controlled oscillator, a linear converter of input voltages into alternating voltages with a phase difference of 90, an adder, an amplifier and a phase-sensitive detector, in which the desired frequency is defined as the tangent of the phase angle between the vector divisible and by the vector of the sum of the dividend and divisor 2j.

The voltage across the synchronous detector's load is proportional to the hip at the phase angle between the dividend vector and the sum vector signal. And only at small angles of phase shift (at a small value of the dividend) the value of & l l can be taken equal to tgip. Such an approximation creates an error in the delivery, sorting: phage from 0 to 90 °, which changes the angle of breath of the phage. Lie of the invention - improving the accuracy and expanding the dynamic range of the measured ratios of the two voltages. Ego goal is achieved by the fact that in a dividing device containing serially connected controlled frequency oscillators, the linear converter of the input voltage to a variable is more variable than the voltage difference in 9О, the adder, the amplifier and the phase sensitive sensor, the latter is connected to the output of the controlled frequency generator by its second input and the output to the control input. The drawing shows a structural electrical circuit of a depot device. The device contains a controlled frequency generator 1, a linear converter 2 input voltages, an adder 3, an amplifier 4, a phase detector branch 5. The principle of the device is as follows. The output voltage of the generator 1 with amplitude and frequency b is fed to a linear converter 2 input voltages, in which it is converted into voltages U RjVj and and 2 - K 2/2, shifted by 90 and proportional to the input voltages V and Vj, arriving at the adder 3. In this case, the phase angle tpj between the voltage 112 and the generator alternating voltage is 1.. Uo, X i i-iv-r where X and p. are respectively the reactive AND active resistance of the phase-shifting chain; , voltage, respectively, on the reactive and active resistances of the phase axis of the moving chain. The tangent of the phase angle (p between the voltage and 2 and the total voltage I, X, TJ at the beginning of the adder

U

one

tgvp ™

and. K.V. , 1, someg t j-k-Vj, l,

COrtSi.

tJ2 K, -V2, K,

tJ from the adder S through 4 goes to one of the inputs 5, to the second input of which the formula of the invention

A separating device containing a series-controlled frequency controlled oscillator, a linear voltage converter into alternating voltages with a phase difference of 90, an adder, an amplifier and a phase-sensitive detector that is powered by the fact that, with an aim, an IT voltage from the generator is applied over time; 1. The voltage at the output of the detector 5, depending on the phase angle 0 between the 5th voltage And the output of the adder 3 and the voltage 1G of the generator 1, pushes the control of the generator 1 and changes its frequency so that the angle Q - 1 –if2 tends to zero. Angle 0 is equal to zero, angle f. equal to the angle F2. In this case, where X jJL with the .inductive nature of the load of the phase-shifting chain, from where —.K, g CO11 & t. jj when the capacitive nature of the load of the phase-shifting chain, from where Thus, in steady state, the frequency generator 1 in a wide range of input voltage Vj and V / j proportional to the ratio with INDUCT - the nominal nature of the load of the phase-shifting chain and - - with the capacitive nature of its load. The use of new connections of a phase-sensitive detector and a controlled frequency generator favorably distinguishes the gepedladny separating device from the prototype, as the accuracy and the dynamic range of the measured ratios of the two voltages increase, which expands the scope of the separation device and eliminates the need to develop a series of divisors | X devices that are close in their accuracy characteristics.

and the accuracy and expansion of the dynamic dynamic ratio of the measured ratios, the faarceous detector with its second input is median with the output of the controlled frequency generator, and the output with its control

by the entrance.

Sources of information received during examination

1. USSR author's certificate N «231899,; Q About Q 7/16, 1967.

2, USSR Copyright Certificate No. 119О17, Q О Q 17/16. 1958.