SU1308993A1 - Device for controlling water level in channel - Google Patents

Abstract

This invention relates to automatic regulation, in particular, to systems for automatically adjusting water levels and flow rates in open channels. The purpose of the invention is to expand the field of application, improve system performance - the system further comprises a water flow sensor by consumers, a second summation unit, a second threshold unit, a control unit, a pump station, a flow meter, a comparison unit and a third threshold unit, input the relay unit is connected with the output of the level sensor at the beginning of this channel section, and the output is connected with the third input of the pulse-width modulator, the first, second and third inputs of the first summation unit Ina respectively with the output of the relay unit, the output of the level sensor at the end of the upstream channel section and the first output of the radio receiving unit, and the output with the first input of the first threshold unit, the first and second inputs of the second summation unit are connected respectively with the output of the water consumption sensor unit, and the output - with the second input of the first threshold unit; in the first section of the channel, the output of the level sensor at the end of the section is connected to the first input of the first threshold unit, and the output sensor the level at the beginning of the section is with the first input of the third threshold unit, the second input of which is connected to the first output of the radio receiving unit, and the output to the first input of the control unit, the second input of the comparison unit is connected to the second output of the radio receiving unit, and the output to the input of the second threshold unit . 11 il. i (L oo o 00 co co CO

Description

This invention relates to automatic regulation, in particular, to systems for automatically adjusting water levels and flow rates in open channels.

The aim of the invention is to expand the scope of application of the system by providing the possibility of controlling water distribution in open channels in which water is supplied by the main pumping station, and to increase the speed and reliability of the system.

FIG. 1 is a functional system diagram; in fig. 2 - level sensor circuit; in fig; 3 is a diagram of a radio receiving unit; in fig. 4 is a diagram of a pulse-width modulator; in fig. 5 is a block diagram of a relay; in fig. 6 is a diagram of the first summation block; in fig. 7 is a diagram of a consumer consumption sensor; in fig. 8 is a diagram of a second summation block; in fig. 9 is a diagram of the first threshold unit; in fig. 10 is a diagram of a radio transmission of its block; in fig. 11 is a diagram of a pumping station.

The system contains a shutter 1, a sensor 2 level, a block 3 relays, a radio receiving unit 4, a pulse-width modulator 5, an executive unit 6, the first block 7 summation, a sensor 8 water consumption by consumers, the second block 9 summation, the first threshold unit 10, a switching unit 11, a radio transmission unit 12, a second threshold unit 13, a pump station control unit 14, a flow meter 16, a comparison unit 7 and a third threshold unit 18.

Each level 2 sensor {FIG. 2) made in the form of a magnetically controlled reed switch 19 mounted on a fixed disk 20, opposite which is placed a lever 21 and a magnet 22 connected to a pulley 23, in whose spiral grooves 24 there is a flexible ha 25 connected to a float 26, and a pulley The level sensor may have a variable diameter in length. In order to provide a constant tension on flexible tubes, each level sensor is equipped with a counterweight 27. Radio receiver unit 4 (Fig. 3) consists of a series-connected radio receiver 28, amplifier 29, demodulator 30, amplifier 31 with capacitive storage, and output unit 32 relay.

The pulse width modulator 5 (Fig. 4 consists of a bridge circuit 33, a magnetic starter unit 34, and a duration shaping unit 35. In the bridge circuit 33, contacts 36-11 Zbsh are the first pair of contacts of the Zbo-Zbts relay 32 of the output relays. Contacts 36t, i -36 ,, the relays ZBO-36., Form the first output of the block 32, the output relays, and the contacts ZVv-36, and the relay form the second output of this unit. Contacts 37, -37, represent the first pair of relay contacts 37., - 37, block 3 relays (Fig. 5).

0

0

five

0

0

In the first block 7, the summation (Fig. 6), contacts 36-36 are the second pair of contacts, the ZBO-36 relay of the block 32 output relays, the contacts 37-2-37 / 2 - the second pair of contacts of the relay 37-37 / block 3 of the relay, relay contacts 38o-38 are the contacts of the reed switches 19 of the level 2 sensor at the end of the upstream channel section. There is also an adder 39.

The water consumption sensor 8 by the consumers contains the sensing element 40 and the switching unit 41. The switching unit 41 contains the threshold elements 421-424 and the relay 43i-43.1 (Fig. 7). :

In the second block 9, the summation (Fig. 8), contacts 43ii-4 34i are the contacts of the relay 43i-434; switching unit 41 of sensor 8 for water consumption by consumers. Contacts 3682-: 36ii2 represent the second pair of contacts of the relay 36g-36m block 32 output relays. There is also an adder 44 .;

The first threshold unit 10 (Fig. 9) consists of the threshold elements 45o-45ii. Block 11 switching sostfit from the relay 46- 46p .:

Radio transmitter BLS 12 (FIG. 10) consists of series of connected frequency modulator 47 and transmitter 48. Frequency modulator 47 consists of twelve capacitors, each of which is connected in series with the contacts of the corresponding relay 46o-46ii switching unit 11.

Pump station 15 contains (fig. 11) pump units 49i, 492, ..., 49 ". The control unit 14 consists of a turn-on determinant 50, a shut-down order determiner 51 and logic circuits OR 52 and 522.

The bridge circuit 33 contains (FIG. 4) a polarized relay 53 and resistors 54 to 54. The magnetic starter unit 34 consists of intermediate relays 55 and 56 and magnetic starters 57 and 58. The duration shaping unit 35 contains a capacitor 59, a transistor 60, a relay 61 , step finder 62, and resistors 63-67.

The system works as follows.

In the initial state, the flow rate supplied to the channel and disassembled by consumers is balanced and the system is operating stably. At the same time, the water levels in the channel sections are kept constant. When the water consumption of a certain section, for example, a third, is changed, the signal proportional to the value A | i of the flow change is taken from the sensor 8 of the water consumption by consumers. Information from this sensor is transmitted through the second summation block 9 to the radio transmitting unit 12. At the same time, there is no signal from the water level sensor 2 at the end of the third section, because the water level in the controlled section at the end of the specified section changes very slowly due to large inertia of the object. The modulator 47 of the radio-radiating unit 12 generates one of the frequencies fg-fii. The modulating frequencies affect the terrain, the frequency of the radio transmitter 48, which is selected in the VHF band. Carrier Modulation - Frequency. The radio receiver unit 4, the signal from the radio transmitter unit 12, is amplified and demodulated. In this case, one of the Zbv-Zbts relays of the block 32 of the output relays of the radio receiving unit 4 is triggered, which closes its contacts in the bridge 33 of the pulse-width modulator 5 (one of the contacts, taking into account the coefficient PI corresponding to the change in water levels from a change in the water consumption of the consumer mi) and in the second block 9 the summation (one of the contacts

36 and 2).

In the diagonal of the bridge circuit 33 of the pulse-width modulator 5, a voltage appears that is proportional to the amount of change A of water consumption by consumers. The block 35 for forming the duration of the pulse-width modulator 5 generates a sequence of control pulses with a duration proportional to the voltage in the diagonal of the bridge circuit 33.

After some time, the level 2 sensor at the end of the third section is triggered. In this case, in the first block 7 of summing, the contacts 38o-38 / of the corresponding reed switches 19 of the sensor 2 are closed, one of the threshold elements 45 is triggered (1-47 of the first threshold unit 10 and one of the relay 46o-46 / switching unit 11, which closes its contacts in the circuit of the modulator 47 of the radio transmitting unit 12. The modulator 47 of the radio transmitting unit 12 generates one of the frequencies fo-fy- modulating frequencies affect the carrier frequency of the radio transmitter 48, which is selected in the VHF range. carrier-frequency. Radio receiver unit 4 b The signal coming from the radio transmitting unit 12 is amplified and demodulated, and one of the Zbo-Zbt relays of the block 32 output relays of the radio receiving unit 4 is activated, which closes its contacts in the bridge circuit 33 of the tweeter modulator 5 (one of the contacts 36-1-3671 ) and in the first block 7, the summation (one of the contacts of 36о2-Збта).

Deviations of water levels at the beginning of the third section trigger one of the reed switches 19 of the level 2 sensor at the beginning of the specified section, which triggers one of the relays 37o-37 of the relay block 3, which closes its contacts in the other side of the bridge 33 modulator 5 (one of the contacts 37-31777) and in the first block 7 the summation (one of the contacts 37-37-3772).

In the diagonal of the bridge circuit 33, a new voltage is applied, proportional to the deviations of the water levels at the beginning and end of the third section of the channel. The block 35 for forming the duration of the pulse width modulator 5 generates a sequence of control pulses with a duration proportional to the deviation of the water levels at the beginning and end of the specified section. The width of the control pulses is determined by the values of deviations of water consumption by consumers and water levels at the beginning and end of this section.

The output signals of the block 32 of the output relay of the radio receiving unit 4 and the block 3 of the relay arrive at the corresponding inputs of the second 9 and first 7 summation blocks, to the other inputs of which signals are received from the water consumption sensor 8 by the consumers and the level sensor 2 at the end of the aligned section (2 -th plot).

In the second adder 9, the signals about changes in water consumption by consumers in the second and third sections are summed up. Thus, the signal at the output of the adder 44 of the second summation unit 9 depends on the change in water consumption by consumers of the second and third sections of the channel.

In the first adder 7, the signals about the deviations of the water levels at the beginning and at the end of the third section and at the end of the highlighted section (the second section) are summed up. Thus, the signal at the output of the adder 39 of the first summation unit depends on the deviation of the water levels at the beginning and at the end of the third and at the end of the second sections. In this case, the summation is performed taking into account the specific features (length, width, depth, terrain, etc.) of the channel sections.

The algorithm by which the nanometer-pulsed modulator 5 of the second section generates a control signal can be represented, for example, in the following form:

U, mu,., IBiAgi + i (K "i-Ah i + KKi-AhKO,

one.

where UMIMM is the control signal of the pulse-width modulator 5 of the second channel section; fii is the coefficient of correspondence of the change in water levels from the change in water consumption by consumers of the i-th portion;

 the amount of change in water consumption by users of the i-ro portion; KHI, KKI-constant coefficients of the weight of the beginning and end, respectively, of the i-ro section of the channel, characterizing the specific features of the sections of the channel (depth, width, length, terrain, etc.)

Ahiii, ANk1 - deviations of water levels at the beginning and end of the corresponding i-ro section of the channel.

Thus, the magnitude of the opening of the openings 1 of each canal site depends not only on the total deviations of water levels at the beginning and end of all the downstream canal sites, but also on the total water consumption by consumers of these sites. This increases the speed of regulation throughout the channel.

If the difference between the total water consumption of the consumers of the entire canal and the flow rate supplied by the pump station 15 exceeds the threshold values of the second threshold unit 13 by the amount gi, the output of the second threshold unit 13 shows a signal that activates the turn-on determinant 40. - The turn-on determinant 50 selects the nasospy unit 49i with the longest parking time and turns it on. In this case, it is stepwise changed by the value of the flow rate of the unit 49: the flow rate supplied to the channel. If there is still a signal at the output of the second threshold unit 13, when the additional pump unit 49i is turned on, the turn-on determiner 50 includes the next pump unit, etc. Additional units of the spreading station 15 will operate until the reserve volumes of all sections of the channel are filled. Since the amount of reserve volumes is usually significant, the number of actuations of additional units decreases sharply, which increases the reliability of the pumping station 15.

If, as a result of switching on the additional units 49, the water level at the end and / or beginning of the first channel section reaches the maximum permissible level, then from the output of the third threshold unit 18, a signal appears that activates the shutdown sequence determiner 51, which turns off the pump the longest time. If, after some time, the signal at the output of the third threshold unit 18 still exists, the shutdown sequence determiner 51 turns off the next pump unit, etc. This leads to a sharp decrease in unproductive water discharges. If, as a result of switching off additional units, the water level at the end and / or beginning of the first section reaches the minimum permissible value, a signal appears at the output of the third threshold unit 18, which activates the switch-on determinant 50. In this case, the control process is repeated and the channel is not emptied.

0

five

0

five

0

five

0

Claims (1)

The invention The system of water level control in the channel, containing at the beginning of the first section of the hydrochannel a level sensor and a radio receiving unit, as well as n channels of adjustment according to the number of hydraulic blocking structures, the first adjustment channel including a series-connected first threshold unit, a switching unit and a radio transmitting unit connected in series a pulse-width modulator and an executive unit connected to the gate with the first hydro-partition structure, a radio receiving unit, The outputs of which are connected respectively to the first and second inputs of a pulse-width modulator, the third input of which is connected to the output of the relay unit connected to the level sensor at the beginning of the downstream section of the hydraulic channel, the second control channel and each subsequent also include series-connected first adder connected to the first, second and third inputs respectively to the output of the level sensor at the end of the downstream section of the channel, to the output of the relay unit and to the first output of the radio receiving unit, and the output to the primary input of the first threshold unit at the first hydropowering facility, the output of the level sensor of the upstream section of the hydrochannel is connected to the first input of the first threshold unit of its adjustment channel, which, in order to expand the area of by allowing the regulation of water distribution in open channels, the water supply in which is carried out by the head pumping station, improving the speed and reliability of the system, it contains at the beginning of the first section of a serial channel, a second comparator unit, a second threshold unit and a pump station control unit, as well as a rotometer and a third threshold unit, the first input of which is connected to the first output of the radio receiving unit, the second input to the output of the level sensor at the beginning of the first section of the hydrochannel, and the output - to the second input of the control unit, the input of the flow meter is connected to the pumping station, and the output to the first input of the comparator unit connected with the second input to the second output of the radio receiving unit, and in each control channel - the last sequently connected consumers flow sensor and a second su.m- Matora whose output is connected to the second input of the first unit of its channel threshold, and the second input - to the second output of the radio receiver unit of its channel.  Rig 20 13 22 BUT 27 21, 2d -2425 2 9G FiaZ / Wigl L / 19 37 /, / Zbog / 36, g / Zb7g I j7 Lj (Pu2.5 P (I 0 (I 2, 4J / v one  PU2.7 FIG. eight FIG. 9