SU600237A1 - System of automatic control of water delivery rate in canals without gating structures wih water outlets - Google Patents

Description

nyHKte control the channel section and are interconnected by communication lines.

The system works as follows.

Suppose that at the considered time point t a change in the water flow in the channel has occurred, for example, due to the failure of the consumer, i.e., Q / has changed to AQ /. This leads to a change in the water level in the sensor probe 1. From the output of the comparison unit 3t, the information on the level change is fed to the adder 4 errors, as well as to the AND 5 / logic element and to the BANE 7g via HE 6i.

The signal from the adder 4 errors is applied to the logical elements BANCH 7 and through blocks 8 dividing the errors into blocks of task 10, except 10 /, since the signal from the logical element HE is not identical in sign with the error signal and the logical element HE 6i does not pass the signal to the block dividing the error 8 /.

In accordance with the received signals from blocks 8, the regulators 12 are rebuilt, compensating for an error in the channel section. Adjusting the controllers changes the flow rate in the sensor sections 1, which leads to the appearance of a signal from the 3 units of comparison. These signals are transmitted to the adder 4 errors through the logical elements HE 6 and 5. The incoming signals compensate each other, and the same error signal remains at the output of the adder 4. The signal from block 3 / does not pass through the element I 5g, since a reverse polarity signal is sent to it from block 3 of the downstream sensor 1.

After a run-in time, the change in the flow rate AQi occurs at the sensor 1 and changes the water level at the sensor. The resultant signal from comparison unit 3 permits operation of logic element Ы, which leads to the compensation of the signal from block 2t at adder 4. At the output of adder 4, a new error signal appears, reduced by the amount of the previous adjustment of regulators 12, but rebuilding these controls -l tori again does not occur, since the magnitude of the error was previously taken into account.

Similarly, there is a change in the magnitude of the error at the output of the adder 4 when passing the modified flow through the remaining sensors.

With the passage of the last channel 1 water level sensor, the error signal is zero.

Claims (1)

Invention Formula The system of automatic control of water flow in canals without water supply systems, contains, and sensors and water level regulators of the downstream water outlets with comparison and reference units and water level sensors with comparison and assignment units, differing from the fact that reducing unproductive water discharges by increasing the system speed, it is equipped with an error accumulator, logical elements NOT, AND, BAN, and error dividing units, moreover, the inputs of the error adder are connected to the units for comparing the water level sensors of the channel through the logical elements NOT and AND, controlled by the error signal of the downstream sensor the water level of the channel, and the output is connected to the units for setting the water level regulators of the downstream of the outlets through the error dividing units and logical elements of the BAN, controlled by the error signals from the sensors channel water level through logical elements NOT. Sources of information taken into account in the examination 1. Bochkarev Ya- V., Gapkin M. 3. and Ovcharov EE. Fundamentals of automation and automation of production processes in hydroamelioration. M., Publishing House Kolos, 1969, p. 306-309. W I1 j E M 9i - & i 7i "J  i ri h Liji 7 "-J