SU1395535A1 - Apparatus for decoding coded signals of automatic interlocking - Google Patents

Abstract

The invention relates to the field of railway automatics and telemechanics, namely to automatic blocking devices. The purpose of the invention is to increase reliability. The receiver 1 of the auto-blocking code signals receives an information signal which is fed to the main registers 2 and 3 of the memory in the event that this signal perceives an additional register. V.To-P 12.80. DLC, parts e - 1 coiner 2 and 3 signals to 1 / histor 10 of memory, the operation of which is controlled by frequency generator 9, the output of which includes clock pulses, provided that the code points are correctly received by the block 5 for determining the long interval and the timer 8, determining the value of the interval between pulses of code combinations. The indicator selection unit 7 controls the operation of the signaling unit 4 with the indicators in case the registers 2 and 3 supply identical information to the inputs of the comparison unit 6, the output of which is connected to the unit 7. The use of the unit 5 and the controlled frequency generator 9 allows decoding the pulses when changing code combinations and switching a locomotive from one track circuit to another, and the presence of blocks 6.7, the register tO leads to the appearance of figurative decoding. The pulses are correctly decoded, even with a strong distortion of pulses in code combinations. 3 3.p. f-ly. 6 Il. l u l u s (L oo co eel sd o ate

Description

3

S

55

fi8.1

113

The invention relates to railway automatics and telemechanics, namely to automatic blocking devices.

The purpose of the invention is to increase reliability.

1 shows a block diagram of the device in FIG. 2 is a functional block diagram of the determination of a long intervalJ in FIG. 3 — a functional block diagram of a controlled Frequency Generator; figure 4 is a functional diagram of the indicator selection block.

 The device (Fig. 1) contains a receiver 1 of code signals, main registers 2 and 3 of memory, a signaling unit 4 with indicators, a long interval determining unit 5, a unit 6 of comparison, an indicator selection unit 7, a timer 8, a frequency controller 9 and an additional frame register 10 are controlled, one of the inputs connected to the receiver 1, whose output is connected to the inputs of timer 8 and block 5, one of the outputs of which is connected to the second input of the register 10 and one of the inputs of registers 2 and 3, and the other output of block 5 is connected to one of the inputs of the generator 9, another KOTopoi o is connected to the Ngeimer 8J output. Generator output 9 is connected to the third input of register 10, which is connected to another input of register 2, and one of the outputs of register 2 and 3 is connected to inputs of unit 6, another output of register 2 is connected to another input of register 3; the other output of which is connected to one of the inputs of block 7, another input of which is connected to the codes of block 6, and the output of block 7 is connected to block 4.

Block 5 for determining the long interval (FIG. 2) contains an RS-flip-flop 11, a delay line 12, an element 13 and a timer 14, the input of which and one of the inputs of the element 13 form the input of the block 5, the other input of the element 13 13 is connected to the output of the RS-flip-flop 11, one of the inputs of which is connected to the output of the timer 14, is formed by one of the outputs of block 5, and the other input of the RS-flip-flop 11 connected via delay line 12 to the output of the element And 13, is formed by another output of the block 5.

The generator 9 (fig.Z) contains RS-triggers 15 and 16, the elements lUIH 17

5 0 5 0 g d

,

0

five

i52

18, element 19, timer 20 and a sensor 21 pulses connected to one of the inputs of element 19, the other input of which is connected to the trigger of the RS flip-flop 15, one of the inputs of which and one of the inputs of the RS flip-flop 16 from the inputs of the generator 9, another input of the RS flip-flop 16 is connected to the output of the element OR 17, one of the inputs of which and one of the inputs of the element OR 18 form another input of the generator 9, the output of the element OR 18 is connected to another input of the RS-flip-flop 15 and the other input element OR 17, another input element OR 18 is connected to the output of the timer 20, input which is connected to the output of RS-trigger 16 and the output of the AND 19 output of the generator 9 is formed.

The indicator selection block 7 (FIG. 4) contains an OR element 22, AND elements 23-28, RS flip-flop 29 and matrix decoders 30-32, the inputs of which form one of the inputs of block 7, the outputs of the decoders 30-32 are connected to the first, respectively three inputs of the elements 23-26, the fourth lid of which and the first inputs of the elements 27 and -28 form another input of block 7, the output of the element 26 and connected to the second inputs of the elements 27 and 28, the third inputs of which are connected to the outputs RS- trigger 29, the first two inputs of which are connected to the outputs of the element OR 22, whose inputs, connected respectively with the outputs of the elements And 23 and 24, the third input of the RS-flip-flop 29, connected to the output of the element And 25, and the outputs of the elements And 27 and 28 formed the output of block 7.

The device works as follows.

After receiving the information signal and its demodulation, the receiver 1 is the envelope that enters the register 10, the input of block 5 and the timer 8. The main criterion by which the long interval is determined is the absence of a single signal at the input of block 5 for 0.5 s. This is registered by timer 14 of block 5 (FIG. 2). After 0.5 seconds, a signal appears at its first output, according to which register 10 is set to O, and registers 2 and 3 overwrite information. Write code word

register 10 starts at the end of a long interval. Since; n and the intervals have different durations, it is necessary to turn on the generator 9 at the time when the long interval ends. This is accomplished in block 5 by an RS-trigger 11, an AND element, and a delay line 12. The clock pulses are fed to another input of the register 10 by an AND element 19 from the pulse sensor 21 and the RS flip-flop 15 of the generator 9 (FIG. 3). The construction feature of the QOL code signal (red-yellow traffic light) requires turning off the generator 9 in 0.2 seconds, this is done using timer 8 (Fig. 1). The identity of the information entry in registers 2 and 3 is controlled by block 6, which performs bitwise comparison. The identity of the information allows the block 7 to generate a control signal to turn on the corresponding indicator of the block 4.

In block 7, the information coming from register 3 is decrypted with matrix decoders 30, 31, 32. Subsequently, it is processed logically using AND 23-28, OR 22, RS flip-flop 29.

All outputs of each decoder combined element OR 22 and connected to the elements And 23-26 (figure 4).

Suppose that the code entered the input block at the time of the presence of a large interval. In this case, after a period of 0.5 s, timer 14 (Fig. 2) generates a signal and sets the input register 10 to O, and RS-three herr 11 to state 1. At the end of the long interval, element And 13 triggers the control signal switching on the generator 9. With a time delay t of 0.1 ms, through the delay line 12, the RS-flip-flop 11 goes into state O. RS-flip-flops 15 and 16 in the generator 9 are set to the single position of the control signal 5 (Fig. 3), as a result of which, new impulses appear at the output of the generator 9. Element And 19 gates the output of sensor 21. RS-flip-flop 16 simultaneously activates timer 20, which after the expiration of time 1.08 s turns on RS-flip-flop 15 through element OR 18. By this time, the code streaks end at 0

five

five

0

five

0

five

0

five

dakh H and M, However, in the YK code it is necessary to turn off the RS-trigger 15 earlier. It performs this timer 8, which records the presence of an interval

more than O, 12 s (for example, a time of 0.2 s is taken up with a margin for all sorts of pulse distortion). In this case, the signal arriving at generator 9 is exhausted. As a result of this effect, both RS-flip-flops (J5 and 16) turn around and there are no clock pulses at the output of generator 9. The presence of the envelope signal at the first input of the register 10 and the clock signal at the third input allows to write the code part of the code dressing. Subsequently, this information is transmitted by a parallel code to register 2. This transmission is carried out at the moment when O is set in register 10. Information from register 3 is fed to the corresponding inputs of matrix decoders 30-32 (Fig. 4). The green fire indicator of unit 4 is turned on if the outputs of the decoders 30, 31 will be logical 1, which will not be at the output of the decoder 32. The indicator of the yellow fire is logical 1 at the output of all the decoders. The red-yellow fire indicator is logical only at the output of the decoder 30.

The absence of codes that is controlled by the AND 26 element should lead to the inclusion of a lunar white light or a red fire indicator of the block 4. The AND 26 element performs this element by the OR 22 element and the RS flip-flop 29, which is set to state 1 when the 3 code arrives or g. At the end of the arrival of the code signals, the single signals arrive at the input of the element And 27. If the code SC arrives, then the RS flip-flop 29 is set to the state O. After the arrival of the codes at the output of the element 28, the signal 1 appears.

All indicators of block 4 are turned on only if block 6 of the comparison outputs signal 1, which characterizes the presence of at least two identical code messages stored in registers 2 and 3.

In the absence of code parcels, the signal is set to O at register 10

II transfer letter (rmigit in penrcTpf.i 2 and 3 comes in every 0.5 s. Vfabat their timer Vt (Fig. 2). When nocTynjie.HUVi code parcel from the middle of the register 10 is written only part of it. Turn off the generator l in In this case, the timer 8 is implemented in the same way as the full receipt of code dressing (Fig. 1), giving a signal to the other input of the generator 9.

Claims (4)

Invention Formula : 1, A device for decrypting crimped auto-blocking signals, comprising a code signal receiver, main memory registers and a signaling unit with indicators, which are designed so that, in order to increase reliability, it is equipped with long-leg trousers interval, comparison and indicator selection, a timer controlled by a frequency generator and an additional memory register, one of the inputs connected to: a code signal receiver, the output of which is connected to the timer inputs and; a long interdetermination unit, one of the outputs The other is connected to the second input of the additional memory register and one of the inputs to the main memory registers, and the other output of the long interval determination unit is connected to one of the following: | soda controlled frequency generator, the other input of which is connected - chfn to the timer output, and the output is connected to the third input of the additional memory register, the output of which is connected to another input of one of the main memory registers, one of the outputs of which is connected to the inputs1 of the comparison unit, another output of one and: 1 memory registers connected to a friend - the input of another memory register, another output of which is connected to one of the inputs of the selector unit, the other input of which is connected to the output of the comparison unit, and the output of the indicator selector unit is connected to the alarm unit. 2. The device according to claim 1, wherein the block for determining a long interval contains RS-flip.p, a delay line, an element And and a timer, the input of which is five 0 five 0 five 0 five 0 five from the inputs of the element And formed the front of the block, another input of the element And connected to the output of the RS-flip-flop, one of the inputs of which is connected to the output of the timer, formed one of the outputs of the block, and the other input of the RS-flip. A hera connected via a delay line to the output of the element AND is formed by another output of the block. 3. The device according to claim 1, characterized in that the controlled frequency generator includes RS-flip-flops, elements OR, AND, a timer and a pulse sensor connected to one of the inputs of the element AND, the other input of which is connected to the output of one of the RS -triggers, one of the inputs of which and one of the inputs of another RS-flip-flop formed one of the generator inputs, another input of the other RS-flip-flop is connected to the code of one of the OR elements, one of the inputs of which and one of the inputs of another element OR formed another input of the generator , the output of each element OR connected to another input of one of the RS-flip-flops and another input of one of the OR elements, another input of the other element OR connected to the timer output, the input of which is connected to the output of the other trigger, and the output of the AND element is formed by the generator output. 4. The device according to claim 1, characterized in that the indicator selection block contains the elements OR, AND, RS trigger and matrix decoders, the inputs of which form one of the inputs of the block, the outputs of the matrix decoders are connected respectively to the nepBbiM three inputs of the four elements AND, the quarter the inputs of which and the first inputs of the fifth and sixth elements And formed another input block, the output of the fourth element And connected to the second outputs of the fifth and sixth elements And, the third inputs of which are connected to the outputs of the RS-flip-flop, the first two inputs from one with the outputs of the OR element, the inputs of which are connected respectively with the outputs of the first and second element AND, the third input of the RS flip-flop, coeziHnnym with the output of the third element AND, and the outputs of the fifth and sixth elements And formed the output biok. 014 0T f6 20 0 phage.d -0 13 8s -0 (rig 2 21 nineteen -0 18