SU758062A1 - Device for counting off time intervals - Google Patents

Description

The invention relates to programming devices for controlling electrical circuits and can be used in medical institutions, various laboratories, exams, and conference rooms.

There are known time interval counters, indicator type stopwatches, sports watches for playing hockey, containing step finders that receive command pulses from time sensors; and light boards, fixing on an accrual basis these impulses

The stretching time reference of 15 requires a constant mental recount of time in the program. The large size, the considerable power consumed by the device, and the limitations of the programs narrow the scope of application of the known devices.

The aim of the invention is to expand the functionality of the device.

To achieve this goal, in 25 programming device, one of the contact rows of the step finder is duplicated and electrically connected through the switch brush to the winding of the program relay. thirty

2

FIG. 1 shows the scheme of the proposed device; in fig. 2 - the second version of the software control of the reference time intervals with the parallel operation of the software and auxiliary relays.

The purpose of the rectifier 1 and time relay 2 is known.

In the relay block 3 there are: step finder (SHI) 4, auxiliary to SHI for the formation of a pulse-pair with it relay (VS) 5 (one contact), program relay 6 (three contacts), auxiliary to program relay 7 (four contacts) , executive relay 8 (n contacts), which works when using the device as a software time relay.

C ₍ and C g, K ₂ - spark-out circuits. € ₃ , K _e are used to adjust the speed of the pulse-pair, adjust the brightness of the digital lamps.

In the control unit 9 there are: lamp 10 of the control of switching on the device, lamp 11 of the control of switching on the program, switch 12 of the program (for 24 programs), button "Start"

13, button "Reset" 14 and indicator

dozen electronic digital lamps

15 and units 16 minutes.

3

758062

four

The block 17 of indicator lamps 17 has lamps 18, 19 (tens and units) of time indication, which are powered in parallel with the power of indicator lamps of the control unit.

The scheme (see Fig. 1) works as follows.

When the power is turned on, the lamp 10 lights up. In the circuit (when the button is pressed), relay 8 operates.

Switch 12 programs are set to one of 24 positions and press the "Start" button 13.

Relay 4 receives power and by contact 20 creates a circuit of operation of relay 5. The latter operates with deceleration.

Contact 21 VS opens and breaks the power circuit of the relay 4.

Thus, a pulse pair is created, allowing the relay 4 to move the brushes along the corresponding rows of contacts. After the first step, the winding of the relay 4 receives independent of the "Start" button the power supply through the circuit that goes through the connected contacts 22 of the row 23.

The pulse pair works until the brush 24 comes up on the programmed contact of the non-switch 12. Then, when the relay 4 is released, a program relay operation circuit b is created.

The voltage drop in this circuit is distributed in such a way that 24 W falls on the winding of the relay 4, and 5 - 36 V on the winding of the relay. But the relay 6 is designed to operate from 24 V and therefore works confidently. At the same time, 36 V is sufficient to hold the relay 5 in operation. Contact 21 turns off the power supply circuit of relay 4 from operation, and contact 25 creates a holding lock for the specified relays. Contact 26 turns on the relay 5. Contact 27 turns on the power to the time relay - command sensor.

Auxiliary relay 7 has four groups of contacts. Pin 28 gives control of program start; Pin 29 shuts off (additionally) the shunting circuit of relay 6. Pin 30 connects the stepping finder to work from a time relay - a command sensor; Pin 31 creates a circuit on the indicator lights.

The assembly of a group of tens and time units is shown in the diagram and does not require a description.

The operation of relay 4 now depends only on the operation of time relay 2, and therefore, after each time unit on the indicator display of blocks 9 and 17, the next digit of the program count lights up.

When installing the brush 23 on the 0-pin, relay 4 stops. All the lamps on the scoreboard show "0", and if necessary, the power supply circuit of the relay 8 is turned on. Before turning on the new one or repeating the program, the "Reset" button is pressed and the circuit returns to its original position.

When resetting an unfinished program after releasing the relay b, the circuit creates a pulse-pair until the brush 23 comes to the 0-contact. The device is ready for a new program.

Thus, the device is capable of issuing a number of programs equal to η - 1, where η is the number of contacts in one contact row of the relay of the step finder. The countdown of time units in the program is from η time to 0.

The second version of the software control of the time interval differs from that described by the split operation of the program relay 6.

Claims (1)

Claim A timing device containing a power unit, a command pulse sensor, a remote control, a relay block with a step finder and a time board, characterized in that, in order to expand its functionality, in the programming device one of the contact rows of the step finder is duplicated and through a brush toggle. The cable is electrically connected to the winding of the program relay.