SU894773A1 - Device for remote control of mechanisms - Google Patents

Description

(k) DEVICE FOR TV MECHANISMS

one

The invention relates to a telecontrol of mainly few dispersed objects with a small number of controlled mechanisms.

A device for remote control of electric crane cranes, comprising relays, diodes and transformers, is known. In this device, the polarization and phase separation circuits are connected to a bridge diagonal consisting of a resistor and a diode and connected between the ends of the secondary o & Transformer drainage l.

However, in the device, even a slight phase shift of the pulses of the transmitting and receiving half sets can lead to incorrect operation of the executive relays, and they may also be falsely triggered if the bridge circuits break. In standby mode, the device consumes energy. Therefore, the scope of application of the known

the device is limited and its use over more distant distances (several hundred meters or kilometers) becomes impossible.

The closest in technical essence to the present invention is a device for remote control of mechanisms, comprising a network transformer, diodes and a switch at the control point, and a network transformer, diodes, thyristors and an executive relay to a two-wire communication line 12 at the monitored object.

However, the remote control device, where the flow,

IS of a certain value in a two-wire line corresponds to the on state of the executive relay and the absence of current in the line - the off state of the executive

Claims (2)

20 relays. To control one dual. The positioning mechanism requires one set of control and a two-wire link. To control a group of two-step mechanism mechanisms, n control sets and (n, 1) communication line wires will be required. The purpose of the invention is to improve the reliability and simplification of the device. The goal is achieved by the fact that the decoder is made in a device for remote control of mechanisms, comprising a network transformer, diodes and switchboard at the control point, a network transformer, diodes, thyristors and executive relays on the controlled object, the first output terminal of the secondary winding at the control point the mains transformer is connected to the anode of the first and to the cathode of the second diode, the second output of the secondary winding of the mains transformer is connected to the cathode of the third and anode of the fourth diode The cathodes of the first and fourth and anodes of the second and third diodes are connected to the inputs of the switch, the output of which is connected to the first output of a two-wire communication line, the second output of which is connected to the exact output of the secondary winding of the network transformer; through the first and second diodes, the anode is connected to the leads of the two-wire communication line, which are connected to the thyristor control inputs, the cathodes of which are connected to the stabilizer cathode and to the intermediate output of the secondary The main winding of the main transformer, the outputs of which are connected to the anodes of the third and fourth diodes, the cathodes of which are connected to the thyristor anodes through the control windings of the respective executive relays. The drawing shows the electrical circuit of the device. The device contains, at point 1 of control, a mains transformer 2, the first to fourth diodes 3 6, a switch 7, a two-wire communication line 8 and 9, on a controlled object 10 a network transformer 11, thyristors 12 and 13, first and second diodes I and 15, and relay 1b - 19, third and fourth diodes 20 and 21, zener diode 22. The device operates as follows. Half-wave pulses, differing in polarity and phase, are obtained using a diode 3 6 and a post. 4 go to the two-wire connection 8 and 9 through the closing contacts of the switch 7. At the monitored object 10, the pulses sent go to the control inputs of the thyristors 12 and 13. The thyristors 12 and 13 are closed until their control inputs are given positive pulses, coincident with the positive voltage at their anodes. Therefore, when entering the two-wire line 8 and 9 of an impulse with a potential plus - wire 8, minus - wire 9 of a two-wire line, the C8LASY will turn on thyristor 12 and, accordingly, actuating relay 16 or 17 depending on which phase of the positive anode voltage of the thyristor coincides accepted When pulses are received in the two-wire communication line by the potential of p / ios - wire 9, minus - wire 8 will turn on the thyristor 13 and executive relay 18 or 19 depending on which phase of the anode positive voltage of the thyristor 13 matches the received one. In this case, only current pulses pass through the thyristor control circuit, due to the voltage of the cut off part of the pulses. Therefore, control pulses are received already. Their width can be calculated by appropriate selection of zener diodes. Now, when the phases of the supply voltage of the semi-sets are shifted, control impulses will not occur on the different-phase impulses of the supplying anode voltages of the thyristors. This eliminates the possibility of false switching of actuating relays, i.e. increases the reliability of the transfer. The thyristors 12 and 13 are disconnected when the supply voltage passes through zero. You can group the actuation of the executive relays one by one and in combinations of two and get eight different combinations, i.e. increase the capacity of the device. The use of the proposed device distinguishes it from the known ones, since the inclusion of a Zener diode in the thyristor control circuit eliminates the possibility of actuating relays malfunctioning when the phases of the supply voltages are shifted, which increases the reliability of the transfer. The implementation of the device according to the simple scheme described above, which contains a minimum of elements and excludes intermediate elements, increases the reliability of the device, which makes it possible to significantly expand its field of application. The invention includes a device for remote control of mechanisms, comprising a network transformer, a diode and a switch at the point of control, a network transformer, diodes, thyristors and executive relays and a two-wire communication line at the controlled object, in order to increase reliability and simplify the first at the control point: the output of the secondary winding of the mains transformer is connected to the anode of the first and the cathode of the second diode, the second output of the secondary winding of the mains transformer is connected to the cathode of the third and anode of the fourth diode, the cathodes of the first and fourth 734 diodes and the anodes of the second and third diodes are connected to the inputs of the switch, the output of which is connected to the first output of the two-wire communication line, the second output of which is connected to the intermediate output of the secondary winding. a mains transformer on a controlled object introduced a zener diode, the anode of which through the persian and second diodes is connected to the leads of a two-wire communication line, which are connected to the control inputs of the thyristors, the cathodes of which are connected to the cathode of the zener diode and to the intermediate terminal of the secondary winding of the transformer, the outputs of which are connected to anodes of the third and fourth diodes, the cathodes of which through the control windings of the respective executive relays are connected to the thyristor anodes. Sources of information taken into account during the examination 1. USSR author's certificate Vt 169633. cl. G 08 C 15/10, 196. 2. USSR author's certificate №, cl. G 08 C 19/16, 1971 (prototype).