SU430000A1 - RAIL CHAIN \ ^ ^ C - • - • ';; with G} t "85 '^ ON sji ??. iiL! i' t UU - Google Patents

Description

one

The invention relates to the field of railway automatics and telemechanics and can be used to control the free path sections, transmitting traffic control signals.

Rail circuits are known to have a coding block at the power end, a frequency divider that is connected to a power source, and a frequency doubler at the relay end, which is connected to a power source through a phase-sensitive block and directly to the rails.

The disadvantages of the known circuits are the small amount of information transmitted, the use of a numerical code with amplitude manipulation and a low transmission rate.

The aim of the invention is to extend the functionality of the circuits.

This is achieved by the fact that the proposed circuit is equipped at the supply end with a phase switch that is connected to the frequency divider, a coding unit and rails, and at the relay end is a receiver and a decoder of phase-shifted signals, while the decoder of the manipulated signals is connected through a receiver of phase-shifted signals to the frequency doubler and rails.

FIG. 1 shows the structural scheme of the described circuit; in fig. 2 is a diagram of a frequency divider and phase manipulator, as an example of a possible practical implementation.

The circuit contains at the receiving end a power source 1, a divider 2 frequencies, a coding unit 3 and a 4-phase manipulator connected to the rails 5, and a frequency doubler 6, a phase-sensitive unit 7, a power source 8, a receiver 9 and a decoder 10 phase-shifted signals.

The frequency divider and phase shift keying device contains thyristors 11-14, transformers 15-17, transistors 18-20, triggers 21 and 22, resistors 23-32, capacitors 33 and 34

and semiconductor diodes 35-46.

Rail circuit operates as follows.

The signals from the power source 1 with a frequency of 50 Hz are fed to the input of the 2 frequency divider,

at the output of which signals with a frequency of 25 Hz appear. These signals are transmitted through the manipulator 4 phases to the rails 5, and depending on the state of the information encoding unit at the output of the manipulator 4 phases

Signals that differ in phase by 180 ° appear. Receiver 9 of phase-shift signals compares the phase of the received signal with the reference one, generates a sequence of binary pulses, which corresponds to the transmitted code combination and

transmits the received signals to the decoder 10.

The output of the frequency doubler 6 contains signals with a frequency of 50 Hz and a constant phase, regardless of the phase of the received signal. Depending on the phase of the signal from the power supply source 8, the phase-sensitive unit 7 generates direct current signals of different polarity. Consequently, when feeding adjacent rail circuits from sources of variable signals, whose phases differ by 180 °, phase monitoring of the isolation of the insulating joints in the rail circuit is carried out.

The operation of the frequency divider circuit with the phase manipulator follows as follows.

When a transformer 15 of alternating current 50 Hz arrives at the primary winding G, transistor 18 outputs pulses to the trigger inputs 22 at intervals of 20 m / s, causing the trigger 22 to switch at intervals of 20 m / s, alternately lowering the potential at resistors 31 and 30 and alternately opening the transistors 19 and 20. As a result, a voltage of 25 Hz is generated on the transformer 17 that controls the ignition circuits of the thyristors 11-14. As a result, a voltage of 25 Hz is applied to the windings of the transformer 16, which is used to power the track circuit.

In order to carry out phase manipulation, two control circuits are provided for each of transistors 19 and 20. These circuits are connected via diodes 40, 42, 43 and 44 to the outputs of the trigger - manipulator 21 in such a way that at one position of the trigger - manipulator 21 are used. chains

control with resistors 31 and 30, and with another with resistors 29 and 32. Since the order of connection of resistors 29 and 32 with flip-flop pins 22 through diodes 45 and 46 is opposite to the order of the similar connection of resistors 31 and 30, changes in the position of the trigger-maniple the torus 21 causes a change in the order of opening the transistors 19 and 20, therefore, the signal phase by 180 ° at the output of the transformer 16.

Subject invention

Claims (2)

1.The rail circuit containing a coding block at the power end, a frequency divider that is connected to a power source, and a frequency doubler at the relay end that is connected to a power source through a phase-sensitive block and directly to the rails, in order to extend its functionality, it is provided at the feed end with a phase handler that is connected to the frequency divider, coding unit and rails, and at the relay end at the receiver and descrambler of phase-shifted signals, while Manipulated signal decoder is connected via a phase-shifted signal receiver to a frequency doubler and rails. 2. Circuit according to claim 1, characterized in that the frequency divider comprises an annular transducer on thyristors connected through a control circuit to a diode coincidence circuit which is connected via a division trigger to the pulse shaper and to the phase manipulator trigger directly.