SU387416A1 - SESSION - Google Patents

Description

one

This invention relates to electronic equipment intended for automatic traffic control.

Electronic devices are known - traffic lights (automatic switches) consisting of series-connected time relays made of electronic tubes and electromagnetic relays.

However, the known automatic traffic lights containing up to four time relays have an elephant circuit, which reduces their reliability and increases the cost of production.

The aim of the invention is to simplify the scheme of an automatic traffic light, increase its reliability and ensure the possibility of mass production in conditions of non-specialized enterprises.

For this, the electronic driver unit is designed as a clock pulse generator on the thyratron, the anode circuit of which includes the first electromagnetic relay, the switching contacts of which are connected to the positive width of the power supply unit and through chains formed in parallel by the closing contact of the second relay and the opening coitact of the third relay, and the closing co-tact of the second relay, and the closing contact of the third relay, are connected respectively to one of the terminals of the windings of the second and third relay; They are interconnected and connected to the negative busbar of the power supply unit, the red signal lamp through the serially connected closing contact of the second relay and the disconnecting contact of the third relay, the yellow warning lamp through the switching contacts of the second and third relay, the green warning lamp through the closing contact of the third relay and disconnecting contact The second relay is connected to the positive power supply bus.

The parameters of the anode resistor are selected in such a way that when the relay is triggered, it self-blocks not through the power source, but until the discharge current of the capacitor flows through it.

Two electromagnetic relays are used for switching signals, the contacts of which simultaneously switch the actuating circuits and adjustable elements at the control value of a thyratron. This made it possible to exclude from the circuit of the automaton all the time relays except the master.

The invention is explained in the drawings.

Pa figs. 1 shows the electrical circuit of the electronic unit; in fig. 2 - the circuit of switching of contacts of the first, second And third relay; in fig. 3 - switching circuit of signal lamps; in fig. 4- time diagram of the device.

The electronic driver unit (see FIG. I) is made in the form of a clock pulse generator on the thyratron /, the first electromagnetic relay 2 is included in the anode circuit of which.

The contacts of the second relay 3 and the third relay 4 switch the switching circuits of the switching on of the red, yellow, green signal lamps and control variable resistors 5, 6 in the control circuit of the thyratron L

Automatic traffic lights works as follows.

When the device is connected to the power source, the second relay 3 will operate (through the switching contact 7 of the first relay 2 and the disconnecting contact 8 of the third relay 4 (see Fig. 2). The second relay 3 by contact 9 (see Fig. 3) will switch on the executive circuit The red signal lamp and the closing contact 10 through the variable resistor 5 (see Fig. 1) control the duration of the red signal lamp will supply power to the charge of capacitor 11. While the capacitor 11 is charged, the first relay 2 will be in a de-energized state.

Upon reaching the ignition potential on the capacitor 11 (control grid of the thyratron /), the thyratron will ignite / and the first relay 2 will operate. After this, the capacitor 12 will discharge in the circuit: the winding of the first relay 2 closing the contact 13 of the first relay 2 (see Fig 1), resistor 14, supporting the first relay 2 under current. With the aid of a capacitor 12, the duration of the first relay 2 being energized is controlled, and thus the duration of the yellow signal lamp is on. Having triggered, the first relay 2, contact 15 turns on the third relay 4. (As a result of the second relay 3 tripping, contact 16 (see Fig. 2) is closed, and contact 17 is thrown into the right position). The third relay 4, triggered by contact 18 (see Fig. 3), turns on the executive circuit of the yellow signal lamp, opening contact 19, de-energizes the executive circuit of the red signal lamp, closes contact 20 and prepares the turn-on circuit of the green signal lamp and the capacitor charge circuit // through variable resistor 6 and make contact 21.

When the capacitor 12 is discharged to the release voltage of the first relay 2, it will release and de-energize the second relay 3. After the second, e, relay 5 releases, the contacts 16 and 22 (see. Fig. 2) are open, contact 17 (see Fig. 3)

turns off the yellow warning light, and pin 23 turns on the green warning light. Now the capacitor 11 will be charged through the variable resistor 6 for adjusting the duration and the closing contact 21 for burning the green signal lamp. While the capacitor 11 is charging, the warning light is green. During the secondary triggering, the first relay 2 opens the third relay 4 by disconnecting contact 15, while contacts 20 and 24 (see Fig. 2 and 3) open, contact 19 closes and contact 18 switches to green and the yellow warning lights go on. After releasing the first relay 2, the four-cycle operation cycle of the device will end, the circuit will return to its initial state and the cycle will be repeated from the beginning.

Subject invention

An automatic traffic light for traffic control, containing an electronic driver unit, electromagnetic relays and warning lights, characterized in that

In order to simplify and increase the reliability of the device, the electronic driver unit is designed as a clock pulse generator on the thyratron, the anode circuit of which includes the first electromagnetic relay, the switching contacts of which are connected to the positive power supply unit and through chains formed by the parallel contacts of the second relay and the breaker contact of the third relay, and

the closing contact of the second relay, and the closing contact of the third relay, are connected respectively to one of the winding terminals of the second and third relay, the second terminals of which are interconnected and connected

to the negative bus of the power supply unit; the red signal lamp through the series-connected closing contact of the second relay and the disconnecting contact of the third relay; the yellow signal lamp through the switching

The contacts of the second and third relays are green. The signal lamp is green through the closing contact of the third relay and the disconnecting contact of the second relay are connected to the positive bus of the power supply unit, the input of the clock pulse generator.

through resistors and chains connected in parallel, consisting of a first adjusting variable resistor and a closing contact of the second relay, a second adjusting variable resistor and a closing

contact of the third relay is connected to the positive power supply bus.

0-4 Scale Output

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