SU1597861A2 - Timer - Google Patents

Abstract

The invention relates to automation and can be used for switching electrical circuits with certain predetermined set time delays both in industrial automation systems and in everyday life. The purpose of the invention is to expand the functionality of a time relay by providing operation in various ranges and periodic operation. The time relay contains 1 pulse generator, 2 frequency divider, 4 hours subtractive counter, 3 minutes counter, encoder 5, power supply unit 6, differentiation unit 7, dimension unit 8, power amplifier 9 and relay 10. After starting, the relay counts the specified time interval and provides switching with periodic equal or unequal settings. The time relay operates in the hour-minute range with a resolution of 1 min and in a minute-second range with a resolution of 1 s, provides periodic switching on and off with equal and unequal pause and pulse durations and switching of high-current electrical loads. 6 Il.

Description

 The invention relates to automation and can be used for switching electrical circuits with certain predetermined time delays; both in industrial automation systems and in everyday life, and is an improvement of the known device described in auth.St. No. 1190358.

The purpose of the present invention is to enhance the functionality by providing operation in various ranges and periodic operation.

Figure 1 presents the structural diagram of the time relay; figure 2 is a variant of the circuit implementation of the pulse generator; on fig.Z - implementation scheme of the encoder; Fig. 4 is a variant of the circuit implementation of the differentiation unit; Figures 6 and 6 are the time diagram of the relay operation, on which along the axis of ordinates are the numerical designations of the outputs of the blocks and the alphabetic designations of the inputs of the D-flip-flop and the functions performed by the relay.

The time relay contains a series-connected pulse generator 1 and a frequency divider 2, a 3-minute counter, a 4-hour counter performed by the subtractive, an encoder 5, a power supply unit 5, a differentiation unit 7, a dimension unit 8, a power amplifier 9 and a relay 10.

The generator 1 can be built (FIG. 2) on series-connected inverters 11, 12 and a frequency divider 13 and a multiplexer 14, a resistor 15. connected in series with a resistor 16 between the output of inverter 12 and input inverter 11. By the first input 18, signal 1 the generator is set to the initial (zero) state, and the log signal O is allowed to work, and at the generator output 19, square-wave pulses are formed with a repetition period of 1 s (with the signal from log.1 at the second 20 generator input) or 1 min (at the signal of the log.O on wto 20 ohm input of the generator).

The encoder 5 (FIG. 3) consists of a time setting unit 21, the switches of which in the parallel binary code 1-2-4-8 are used to set time settings connected in series to the inverter 22 VT element 23 AND, the one-shot 24, which in the simplest case can to be a capacitor, switch 25. contains O

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The first 26 and second 27 function setting switches, as well as the first 28 and second 29 resistors, the start block 30 and the D-flip-flop 31. The first 32 inputs of the encoder are connected to the switch switches of the lower decade time, and the first 33 outputs are connected to the time switch the highest decade of the block 21. The second 34 input of the encoder is the input of the inverter 22. The second 35 and third 36 outputs of the encoder are connected to the outputs of the D-flip-flop 31 and the switch 25, respectively. All switches of the encoder 5 are one- or two-pole, two-position, with independent fixation, the image of the switches in FIG. 3 corresponds to the pressed state of the buttons.

The block 7 can be differentiated on a series-connected switch 37, an inverter 38, a capacitor 39 and a resistor 40, as shown in FIG. 4. The input 41 of the unit 7 is connected to the switch 37, the first output 42 to the connection point of the switch 37 and the inverter 38, and the second output 43 to the connection point of the capacitor 39 and the resistor 40.

As a unit of dimension 8, a single-pole two-position switch can be used, which ensures the formation of the output log from the log. About when the button is pressed and LOG.1 when the switch button is pressed.

The time relay works as follows.

Before the time relay is put into operation, the function and the corresponding time settings are set. The assignment of functions is performed by the block 25 of the switch of the encoder 5, depending on the position of the switches 26 and 27 of this block, the time relay can perform the following functions:

Qi - time delay for switching on (off), this function is performed when the buttons of switches 26 and 27 are pressed (see Fig. 3);

Qa - after the time set by the switches of the high decade of block 21, the relay is turned on and off by the time set by the switches of the lower decade of block 21, the function is set by pressing the button of the switch 26;

Oz is the periodic repetition of the function Q2, the function is set by pressing both buttons of the switches 26 and 27;

Q4 is a periodic repetition of the disconnected (pause) and on (impulse) relay states, the duration is different between each other and given by the buttons of the lower and upper decade switches of the block 21, the function is set by pressing the switch 27 button.

The time settings of the listed functions are set by pressing the corresponding buttons of the block 21 of the encoder 5, the values of the settings being determined by the sum of the numerical values of the buttons pressed. For example, with the buttons pressed with the values: 1, the highest decade of 16, 32 of the younger decade, the relay should work as follows. When performing the function:

QI - on (off) after 1 h 48 min;

Q2 - after 1 h the relay will turn on and off after 48 minutes;

Oz is a periodic repetition of the function Qi, with a pause duration of 1 hour, a pulse of 48 minutes;

Q4 - periodical switching on and off of the relay at regular intervals of 1 h 48 min,

The time settings are made based on the state of the switch.

the dimension of the block 8 being dialed, if the switch button is pressed, the dimension will be hours and minutes; if pressed, the dimension of hours and minutes turns into minutes and seconds. The operation of the relay is further considered with the dimension of hours and minutes and the pressed buttons of block 21 with values of 1 hour, 16 minutes and 32 minutes.

When the power supply unit 6 is turned on (time t in FIG. 5, 6), the signals of LOG.1 and O are set to the first 42 and second 43 outputs of differentiation unit 7, respectively:

-generator 1 pulses and divider 2 frequencies are set to the original (zero)

the state at their outputs will generate log signals.

- 4 hours counter operation is prohibited by signal LOG.1, arriving at its R-input,

and the output signal is equal to log.1, regardless of the level of signals at its other inputs,

- work of the counter for 3 minutes is prohibited by the signal LOG.1, arriving at its R input from the output of counter 4, all output signals

counter 3 equals log.O,

the signals at the first inputs of the element 23 And connected to the buttons 16 and 32 of the block 21, as well as at its second input connected to the output of the inverter 22 are equal

log.O, as a result, the output signal of the elec- tant 23 is also equal to log, 2, the D-flip-flop 31 is set to the initial (zero) state by the signal of LOG.1, coming to its R-input from the output of the starting block 30, independently of the signal level on the rest of his entrances.

The signals on the second 35 and third 36 outputs of the encoder 5 have a log.O level.

- the output of the power amplifier 9 is closed, as a result of which the relay 10 is de-energized, the load 1 is turned on through the normally-closed relay contact, the load 2 is turned off, as its power supply circuit is interrupted by the normally-open contact of the relay 10 (the contact of the relay 10 contacts figure 1 is not shown).

The inclusion of the time relay in operation (time to figure 5, 6) is performed by pressing the buttons 37 of the differentiation unit 7 and 30 of the encoder 5, while:

- on the first 42 output of the differentiation unit 7, a signal log, O, will enable the operation of generator 1, divider 2 and counter 4, and on the second output 43 a pulse will be generated, according to which the time setting of unit 21, set by 1 h button, will be recorded in counter 4 ,

- on the R-input of the D-flip-flop 31 of the encoder 4 a resolving signal level equal to the log will be set. O, the output signal of the D-flip-flop will not change,

The state of the remaining time relay blocks remains unchanged.

Thus, the time relay works when executing any of the functions Qi-Q4; the description of the further operation of the time relay is GIVENLY applied to the performance of each of these functions,

1) for the QI function after the expiration of 1 hour (time t2 in FIG. 5.6), the output of the counter is 4 hours and the log.O signal is applied, according to which:

- the 3 min counter will start counting the time by counting pulses with a repetition period of 1 min arriving at its C input (counting input) from the output of generator 1,

- on the second input of the element 23 of the encoder 5, a resolving signal level equal to the log will be established. 1, however, the output of element 23 I remains equal to the log. O, since at its first inputs connected to the buttons 16 and 32, the signals are equal to the log. O.

After the time 16 + 32 48 min since t2 (time ta 5, 6) at the corresponding 3 min counter outputs, log 1 is set, as a result of which, on all inputs of element 23, the AND signals will become log 1, and the output of the element 23 And the VITs logJ ,, signal, which through the normally-closed contacts of the switches 26 and 27 will go to the S input of the D-flip-flop 31, thereby causing its operation. The output signal of the D-flip-flop 31, equal to log.1, coming through the second 35 output of the encoder 5 to the amplifier 9 power will cause

switching on the relay 10, as a result of which the load 1 is disconnected and the load 2 is switched on.

2) For function Q2, after 1 hour (time in figure 5.6), the output

4 hours counter on VITS log.O signal, according to which:

- the 3 minutes counter will start counting the time by counting pulses with a repetition period of 1 or 1 minute arriving at its C input from the generator 1,

-at the second input of the element 23 And the encoder 5, the authorizing level Signals is set equal to log.1, however

5, the output signal of the element 23 AND will remain equal to the log. O, since at its first inputs, connected to the buttons 16 and 32, the signals are equal to the log. O. . - change the output signal level

0 one-shot 24 with a log.O on 1 will cause the appearance at its output of a positive pulse, which through a closed (when the button is pressed) contact switch 26 and a normally-closed contact switch5 bodies 27 will enter the S input of the D-trigger 31, thus causing the installation its single state, the output signal of the D-flip-flop 31, different log.1, flowing through the second 35 output of the encoder 5 to the amplifier 9, will cause the relay 10 to turn on, causing the load 1 to turn off and the load 2 to turn on.

In this state, the time relay will remain until the expiration of time 16 + 32

5 48 min (instant gz in fig.b, 6), with this, the log 1 is set at the corresponding outputs of the counter 3, as a result of which all the inputs of the element 23 And the signals become equal to the log, 1, and at the output of the element 23 And signal

0 log.1, which through the pinched (with the buttons pressed) contacts of the switches 26 and 30 arrive at the R input of the D flip-flop 31, thereby causing it to be reset to its original zero state, the output signal of the log, O

5 of the D-flip-flop 31, this will cause the relay 10 to trip, causing the load 1 to turn on and the load 2 to turn off.

3) For the function Oz after the time expires 1 hour (time t2 in FIG. 5, 6) at the output

0 counter 4h on Wits log.O signal, according to which:

3 minutes counter will start counting time by counting pulses with a repetition period of 1 minute arriving at its C input from

5 generator outputs 1,

- at the second input of the element 23 And the encoder 5, a resolving signal level equal to the log, 1, will be set, however, the output signal of the element 23 W will remain equal to the log. O, since its first inputs

connected to the buttons 16 and 32, the signals are equal to the log.O,

7, the change in the signal level at the input of the one-shot 24 from the log O to 1 will cause by the output at its output a positive impulse that through the closed (with the buttons pressed) contacts of the switches 26 and 27 will go to the counting C-input of the O-flip-flop 31 thereby causing its state to change from zero to one, while the output signal of the 0-flip-flop31 equal to LOG.1 coming through the second 35 output of the encoder 5 to the power amplifier 9 will cause the relay 10 to turn on, causing the load 1 to turn off and the load 2 to turn on .

In this state, the time relay will be before the expiration of time 16 + 32 48 min (moment Тз in figure 5). In this case, the corresponding outputs of the 3 minutes counter are set to log.1, as a result of which all the inputs of the element 23 And the signals become equal to Log L, and the output of the element 23 And the signal of log.1, which is;

-through the closed (when pressed-buttons) contacts of the switches 26 and 30 arrive at the R input of the D-flip-flop 31, thereby causing it to be reset to its initial zero state, the output signal of the D-flip-flop 31 will cause a trip a relay 10, 8 which causes the load 1 to turn on and the load 2 to turn off,

- through the closed (with the button pressed) contact of the switch 27 and the third 36 output of the encoder 5 will go to the second 41 input of the differentiation unit 7, since the button of the switch 37. of the block 7 is pressed on the first 42 output of the unit 7 will also set the logic 1 signal (signal to The second 43 output of the block 7 will remain unchanged, i.e., the log (O) is equal, which will set the blocks 1-4 to the initial zero state. Setting the last counter block of 3 min to the zero state will result in the output of the element 23 AND of the encoder. B signal of the log.O, which through the closed contact of the switch 27, the third 36 output of the encoder 4, the second 41 input of the unit 7, the closed contact of the switch 37 and the first 42 output will allow the operation of blocks 1, 2 and 4 of the time relay simultaneously (when the signal level changes at the second 41 input of the block 7 with log.1 naO) at the second 43 output of the block 7 a positive pulse is received, according to which the time setting of the block 21 specified by the 1 h button is written to the 4 h counter. The relay times have completed the first 1 hour pause and impulse lasting 48 min, began to work in a second pause (with a duration of 1 h), which will occur as it was described earlier.

) For Q / i functions, the description of the time relay operation coincides with the previously mentioned onset of operation in the mode of performing the QI function before appearing at the output of element 23 And the encoder 5 log.1 (time tz in figure 5, , at the end of the time (pause) 1 h 48 min:

0 - through the normally-closed contact of the switch 26 and the closed (with the button pressed) contact of the switch 27 will go to the C input of the D-flip-flop 31, thereby causing a change in its state - 5 from zero to one, and the output of the D-flip-flop 31, equal to the log, 1, will cause the relay to switch on 10 m load,

- through the closed (with the button pressed) contact of the switch 27 and the third 37 output 0 of the encoder 5 will go to the second 41 input of the differentiation block 7, since the button of the switch 37 of this block is pressed on its first 42 output, the signal log.1 will also be set (the signal on the second 43 the output of block 7-5 will then remain unchanged, i.e., log.O), which will set blocks 1-4 to the initial zero state. Setting the last counter block of 3 minutes to the zero state will result in output at output of block 23 AND of the encoder 5 of the log.O signal, which through the closed contact of the switch 27, the third 36 output of the encoder 5, the second 41 input of the block 7, closed a switch 37 contact and the first 42 output of this 35 block will allow the operation of blocks 1, 2 and 4 of the time relay, at the same time (when measuring the signal level at the second 41 input of block 7 from log.1 to 0) at the second 43 output of block 7, a positive pulse , according to which the time setting of block 21 is recorded in counter 4, the cipher ora 5, set by 1 hour button

Having thus worked the first pause with a duration of 1 h 48 min, time relay 45 began to work out a pulse, the O-flip-flop 31 will be in the same state until the pulse time equal to 1 h 48 min (time and figure 5,6) after which the D-flip-flop 31, with a signal from its C 50 inlet, tsu, will change its state to zero, the time relay will begin to work out the second pause, etc.

When executing any of the functions of Qi Q4, the time relay g / southerly is set to 55, the initial state by bringing the buttons of switches 37 of block 7 and 30 of the encoder 5 to the pressed position.

Similarly, the time relay can operate at different settings and in

minute-second ranges with a resolution of 1 s.

Claims (1)

Formula of the invention St. USSR Ms 1190358, characterized by that. that, in order to extend the functionality by providing work in various bands and periodic operation, a power amplifier is inserted into it, the input of which is connected to the second output of the encoder, a relay whose winding is connected between the power bus and the output of the power amplifier, and the switching contact is output time relay, and the unit of dimension, and the generator is equipped with a first input and a second input, which is connected to the output of the unit dimension, a frequency divider, the second input of which is connected to the first input of the generator Pa and the first output of the differentiation unit, the second input of the differentiation unit is connected to the third output of the encoder, which contains the time setting block, AND element, inverter, one-shot, switch, start block and D-flip-flop, first inputs of the AND element are connected to the switching contacts of the first switches the time task block, the break contacts of which are connected to the power bus, and the closing contacts are connected to the first inputs of the encoder, the second input of which through the inverter is connected to the second input of the And element and the input of the one-shot, the first outputs of the encoder are connected to the switching contacts the second switches of the time setting unit, the opening contacts of which are connected to the common bus and the closed ones to the power bus, the second output of the encoder is connected to the D-flip-flop output, the first setup input and the D-flip-flop counting input are connected to the common bus the switch, the second setup input of the O-flip-flop is connected to the change-over contact of the switch of the start-up unit, the disconnecting contact of which is connected to the power bus, and the closing contact is connected to the first switching contact of the first 5 switch switch, the first disconnecting contact of which is connected to the common bus, and the first closing contact - with the output of the element And, the first closing contact of the second switch of the switch and the second disconnecting contact of the first switch of the switch, the second closing and second switching contacts of which are connected respectively to the output of the single-oscillator and the second 5 switching contact of the second switch of the switch, the second disconnecting and second closing contacts of which are connected respectively to the first installation stroke and counting vho- 0 house O-flop inverse output is connected to, D-input, a first normally closed contact and the first changeover contact switches of the second switch are connected correspondingly with the general schinoy 35 and the third output of the decoder. Zi / 25I-. 27. .., I L.-ZJ 25I-. 27. .., I  I 1fnum I V i L R 9U2. Hj. AND ci about  "RJcsT