SU481028A1 - Device for automatic control of the cost ratio - Google Patents

Description

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The invention relates to devices for automatically controlling the flow ratio of liquids, gases or other media, as well as the rotational speeds of the shafts, and can be used in various industries.

The known devices comprise flow meters, a reference frequency generator with dividers connected to pulse formers, and integrators connected to executive mechanisms.

The disadvantages of these devices are low endowment and low control range.

A trigger is entered into the proposed device, two inhibitor circuits and a subtracting amplifier, the output of which is connected to the integrator input, and the input - to the outputs of the inhibitor circuits, one inputs of which are connected to the trigger outputs, and the outputs of the pulse former and connected to the second inputs of the inhibit circuits and the trigger inputs.

This makes it possible to increase reliability and to extend the range of adjustment of the device.

A block diagram of a device for automatically controlling the ratio of two flow rates (in the case of a large number of flow rates, identical circuits are added to the device) is shown in the drawing, where 1 is the reference frequency generator; 2 dividers; 3 - flow meters; 4 and

2

5 - pulse shapers; 6 - triggers; 7 - executive mechanisms; 8 and 9 - prohibition schemes; 10-subtractive amplifiers; 11 - integrators.

The device works as follows.

The impulses from the outputs of the flow meters 3 and the generator 1 of the reference frequency, through dividers 2, enter the inputs of the formers 4 and 5. The generated pulses are then fed to the inputs of the flip-flops 6 and simultaneously to the second inputs of the inhibit circuits 8 and 9, the first inputs of which are prohibiting (enabling) wiring to the outputs of the flip-flops 6. When each pulse arrives at a lower frequency, the outputs of the inhibit circuit will not pass the corresponding pulse at a higher frequency. Thus, the difference frequency of one polarity is delivered to the input1, and to the inputs of subtractive amplifiers 10, which form the corresponding polarity of the difference frequency, determined by the ratio of the frequencies generated from the outputs of the forwarders 4 and 5.

The difference sequence of nmnuls, nolozhtelnnoy or negative polarity, but the input to the inputs of the integrators II, the output signal of which affects the use of body mechanisms 7, supports the set cost ratio in a manner KHM. The regulated cost ratios are achieved by changing the ratio of coefficients to the division of dividers 2, both simultaneously and in any combination of them. A measure of the total gain of the device, and accordingly the total consumption, is needed; 1, the frequency of the reference frequency generator 1 is changed.

Increasing or decreasing the 1НН1 flow rate, naimer, flow meter 3, from a given ratio at the output of integrator 1 but turns the signal of the corresponding sign, acting on a non-complementary mechanism 7, which will tend to change the flow rate of the medium through the flow meter 3 to the specified flow ratio.

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ivOTOpbix are connected to the trigger outputs, and the outputs (1) are fixed, 1 nm are connected to the second inputs of the circuits, and n the trigger inputs.

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