SU981965A1 - Technical process control device - Google Patents

Description

The disadvantage of this device is its functional limitations, expressed in the absence of taking into account the actual performance of each device, which leads to a decrease in the overall performance of the entire group of devices.

The closest to the technical essence of the invention is a device for automatic load distribution — between parallel operating technological devices, containing load sensors, controllers, summation units and converters. In such a system, the load on each apparatus varies depending on the thickness of the inlay of EZ in it.

A disadvantage of this device is that its functionality is limited due to the inability to take into account the actual performance of each device, for example, the actual specific product yield. This leads to a decrease in the overall performance of the entire group of devices.

The aim of the invention is to expand the field of application of the device.

The goal is achieved in that a device containing the number of technological devices has load sensors, the output of each of which is connected to one input of the corresponding controller, and an adder, the output of which is connected to the input of a functional converter, is entered by the cy load generator and by the number of technological devices multiplying blocks of correction blocks, signal limiting blocks and sensors of output parameters of the controlled process, the outputs of which are connected to the first inputs of the corresponding correction blocks, the second inputs of the cat connected to the outputs of the respective load sensors, the outputs of the correction blocks are connected to the input of the adder, the output of the functional converter is connected to the first inputs of the multiplication blocks, the second inputs of which are connected to the output of the total load setting device, the third inputs to the outputs of the corresponding correction blocks, and the outputs of the blocks multiplying through the appropriate signal limiting block is connected to other inputs of the corresponding regulators.

The drawing shows a block diagram of the proposed device.

The circuit contains load sensors 1, sensors 2 output parameters of the controlled process, correction blocks 3, adder 4, functional converter 5, total load setpoint b, multiplication blocks 7, signal limiting blocks 8, regulators 9, including a regulating block

10, the switch 11, the setting device 12 and the Executive body 13, technological devices 14.

The device works as follows.

The signals of the load sensors 1 and the sensors 2 of the output parameters of the controlled process enter the corresponding correction blocks 3, where the power values of the devices are corrected by the specific output

one)

M (Ny, M

where Hj is the output value of the i-th correction block, the corrected power;

M - power of the 1st unit;

Y, - is the specific output of the i-th apparatus;

8, is the output parameter of the i-ro apparatus;

H, - - load on the i-th apparatus.

As an output parameter, product flow rate at the outlet of apparatus G or flow rate in terms of target product 6 can be used (1, where Qi is the concentration of the target product at the output of the i-ro apparatus. The output signals of the correction unit are summed in adder 4

S P M. (2)

1: 1

where C is the output of the sumgator

n - the number of devices. The output signal of the adder 4 is supplied to the input of the functional converter 5, which calculates a value inversely proportional to the received

. one

(3) .With

where f is the output signal of the functional converter. The output signals of the functional converter 5, the setpoint generator of the total load b and the corresponding correction blocks 3 are fed to the inputs of the multiplication blocks 7, which calculate the given load on each device

(:

P-P-FM

where P, - is a given load on i

apparatus;

P - total load. Taking into account the pronounced (1), (2) and (3), we obtain from Ct)

R;

The output signals P of the multiplication units 7 are fed to the signal limiting units 8, which in the case of

By exceeding the signal P, a value equal to the power of this unit M limits the output signal in order to prevent an accident. The output signals of the blocks 8 restrictions are equal

GR |

at Р i v М,., i 1 М, at Р {М,

The sloping signals P, - limiting blocks 8 are nominal values for the regulators 9 and are fed to their reference inputs. The setpoint inputs of the controller 9 are connected to the switches 11, to the other inputs of which the manual setting units 12 are connected, used for the manual individual control of the process devices 14 in the start and stop modes. The outputs of the switches 11 are connected to the inputs of the task of the control units 10, the second inputs of which are connected to the corresponding load sensors 1. Regulators 9 maintain the load of technological devices 14 at a predetermined level by means of executive bodies 13.

The device can be implemented on standard elements of pneumatic automation, electronics or computer technology.

This device allows to increase the efficiency of functioning of the whole group of devices working in parallel by taking into account the specific output reflecting the efficiency of each device.

Claims (3)

1. Regulators: proportional-integral pneumatic ratios of PR 3.23; PR 3.24. Instructions for installation and operation, 1971. Factory Tizpribor, Moscow. 2. Authors certificate of the USSR W 452812, cl. G 05 D 27/00, 1973. 3. USSR author's certificate No. 564266, cl. G 05 D 27/00, 1975 (prototype). R