RU2327590C1 - Signal conditioner of continuous-amplitude channel in multi-digit automatic cab signalling system (фс-ен) - Google Patents

Abstract

FIELD: mechanics.

SUBSTANCE: invention relates to railway automatics and is designed to form and amplify signals from continuous-amplitude cab signaling system. Signal conditioner of continuous-amplitude cab signaling system consists of two two-channel synthesisers, main and backup. Synthesisers operate in parallel. Each synthesiser is controlled by own control circuit, arbiter. Arbiter switches over main and backup synthesiser by means of switch. Each synthesiser contains generator and start-up modules to actuate phase-shift keyed signal conditioners. Signal conditioner content is determined by input key module signals. Signal conditioner generate control module startup signal. Paraphrase reference frequency signals are supplied to control module input. Signal conditioner also generates phase-shift keyed signal supplied to indication, diagnostic and power amplification module inputs, which further transmits it to synthesiser output.

EFFECT: reliability and safety improvement for continuous-amplitude cab signaling system instrumentation.

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Description

The invention relates to railway automation and is intended for generating and amplifying signals of a single continuous automatic locomotive signaling (ALS-EN) in accordance with the information received from automatic blocking devices or electric centralization (EC), and is a part of ALS-EN track devices.

The prior art railway locomotive signal transmitter for transmitting a locomotive signal for reception by a railway vehicle. The locomotive signal is encoded at a preselected frequency so that the resonant circuit operates in conjunction with a code-shaping signal to act as a constant current signal source. The reduction of the maximum rail flow of the locomotive signal was achieved, thereby mitigating the flow of the locomotive signal, which could be available for reception by the following trains (US 5330134, 07/19/1994).

The disadvantage of this system and method is the low reliability.

A device is known for generating and transmitting signals of a code rail circuit, comprising a frequency generator connected in series with carrier and clock pulses, an address encoding unit and a memory unit, a phase difference modulator, a signal generation correctness control unit, an inverter, the first and second code selection blocks. Each of the code selection blocks consists of an encoder, a multiplexer and a D-trigger, the first groups of information inputs of the multiplexers of the code selection blocks are connected to the outputs of the encoders. The output of the pulse shaper is connected to the input of the inverter, the output of the carrier shaper is connected to the first input of the phase-difference modulator, the output of which is the output of the device connected to the first input of the control unit for correct signal generation, the second, third, fourth, and fifth inputs of which are connected to information and synchronization inputs D-flip-flops. The device is equipped with a control pulse generator, each of the code selection blocks is equipped with a register and an OR-NOT element. The control inputs of the multiplexers of the code selection blocks are connected to the first output of the control pulse generator, the second groups of information inputs to the corresponding groups of register outputs, and the outputs to the first groups of information register inputs, the other inputs of which are connected to the second output of the control pulse generator, an input connected with the output of the address coding block. The high-order bits of the outputs of the registers are connected to the first inputs of the OR-NOT elements, the second inputs of which are connected to the inverter output, and the outputs to the synchronizing inputs of the D-flip-flops, the information inputs of the D-flip-flops are connected to the outputs of the memory block, and the outputs to the sixth and seventh inputs a control unit for correct signal generation and the second and third inputs of a phase difference modulator (RU 2005639, 01/15/1994).

The disadvantages of this device is the lack of reliability and safety of track equipment, since there is no possibility of automatic exclusion from the system in case of failure.

The objective of the invention is the creation of a signal generator of a continuous channel of a multi-valued automatic locomotive signaling system that provides a technical result consisting in increasing the reliability and safety of ALS-EN track equipment through the use of modern components, modern manufacturing technology, a high degree of noise immunity, the availability of redundancy and automatic exclusion from the system of the failed set, which eliminates train delays due to casa PS-EN by using the diagnostic predotkaznogo state.

The specified technical result is achieved in the signal generator of the continuous channel of a multi-valued automatic locomotive signaling system, consisting of two two-channel - main and backup - synthesizers operating in parallel, each of which is controlled by its own control circuit, an arbiter, which switches the synthesizers from the main to the backup by means of a key, at the same time, each synthesizer contains a generator and trigger module, which drives the phase shifters into dynamics th e signal whose information content is determined by the input signals of the module keys, and generates the trigger signal control module at the input of which receives the paraphase signal frequency and phase-shift keyed control signal supplied to the inputs of the indicating and diagnostics and a power amplifier, which outputs it to the synthesizer output.

The drawing shows a structural diagram of FS-EN.

FS-EN is a part of ALS-EN track devices and is installed on the shelves of relay cabinets EC or self-locking cabinets designed to install relay NSh or DSSh.

The basic principles for constructing FS-EN are: two-channel structure for constructing a module for generating code signals with control of equivalence of channel functioning; independence of ALS-EN signal generation channels, including independence of power supply channels; application of a comparison scheme for formation channels with self-monitoring of the health of all composite components; detection of a single device failure in a given time; exclusion from the system of a failed device after a specified time; availability of a backup kit.

One of the principles for ensuring safe functioning is a two-channel structure for constructing a synthesizer, which works on the principle of 2 out of 2, that is, a failure of one of the channels leads to a protective failure of the synthesizer, expressed in the cessation of the output of the information signal to the output.

FS-EN consists of two two-channel ALS-EN signal synthesizers operating in parallel, main 1 and backup 2, each of which is controlled by its own control circuit. The output information signal of the product is a phase-shift signal (PMS) of alternating current frequency of 174.58 Hz with double phase difference modulation, which allows transmitting information over two subchannels, generated by the main synthesizer. The phase-manipulated signal (PMS) comes from the output of one of the synthesizers (hereinafter active). In the event of a malfunction of the main synthesizer, the output signal of the product automatically becomes the signal generated by the backup synthesizer. The failure of any synthesizer is detected by the state of its own diagnostic output, which can be used to monitor the FS-EN operability, including informing about the pre-failure state. Switching synthesizers from primary 1 to backup 2 and vice versa (after restoring the primary) is done by arbiter 10 using key 11.

The composition of synthesizer 1 and 2 includes:

- a network power supply 9, which converts the AC voltage of 220 V into a DC voltage of 48 V, providing power to all synthesizer modules;

- an input key module 3, which provides control of its proper functioning and coordination of the device with external circuits for selecting the required code combination (provides galvanic isolation of the external circuit for selecting the code combination from the internal circuits of the device), as well as the protection of FS-EH from external electromagnetic influences. The input key module 3 has two own power sources, which convert the DC voltage of 48 V to DC voltage of 24 V (power supply of external circuits) and 5 V (power supply of internal circuits);

- shapers phase-shifted signals 4 and 5, which synchronously generate the FMS. The information contained in the FMS is determined by the data received from external devices through the input key module 3. In addition to the FMS, the drivers 4 and 5 generate INTEST signals (controlling the health control circuits of the input key module 3, that is, closing all keys at a time when they are not interrogated by shapers), KT1 and KT2 (obtained by mixing dynamic controlled signals, including FMS). Each driver has its own built-in DC power supply that generates voltage VCC1 (2);

- a control module 7, which determines the reliability of the generated FMS by comparing the control signals KT1 and KT2 (their paraphase) and checks the health of the input key module 3 (monitoring the presence of the OUTTEST signal, which, when the input key 3 is healthy, is issued to the control module 7), and provides blocking FMS with a negative result. In addition, the control module 7 generates diagnostic signals of its condition. Under the condition that the signals KT1 and KT2 are paraphased and the OUTTEST signal is present, the control module 7 ensures the passage of the phase-manipulated signal FMS1 coming from the driver 4. The control module 7 has two stages: the first receives power from the driver 4 (VCC1), the second from the driver 5 (VCC2);

- generator and trigger module 6, designed to provide dynamic operation and synchronization of synthesizer nodes, as well as generating control signals for starting the control module;

- an indication and diagnostic module 12, providing FMS decoding, diagnostics of the control module 7, displaying the generated code combination number and light indication of the synthesizer functioning;

- power amplifier 8, designed to enhance the FMS, coming from the control module 7. Power amplifier 8 receives power directly from the mains power supply 9.

The arbiter 10 is designed to assess the health of synthesizers, on the basis of which, by means of a key 11, it assigns a functioning synthesizer as active, and also generates control signals for diagnostics and indication of FS-EN operability. The health of the synthesizer is assessed by the presence of a signal at the output of a power amplifier 8.

FS-EN ensures the formation of sixteen codes for each of the two subchannels in the form of a modified Bauer code and their alphanumeric display on the left (on the first subchannel) and right (on the second subchannel). The logical values of the information packages in both FS-EH subchannels correspond to a change in the phase of the carrier frequency.

Work FS-EN.

Turning on the power causes the generator module to start and start 6, which drives the drivers 4 and 5. The drivers 4 and 5 generate the FMS, the information content of which is determined by the signals of the input key module 3, which in turn depend on the state of the external circuit for selecting the code combination number. After a specified time, the generator and start-up module 6 generates a start-up signal of the control module 7. Provided that the signals KT1 and KT2 are supplied to the control module 7 from the shapers 4 and 5 and the analysis of the OUTTEST signal received by the control module 7 from the input key module is positive 3, the monitoring module 7 starts up (is put into operation). This means that the FMS1 signal generated by the driver 4 is passed by the control module 7 to the input of the power amplifier 8. The FMS generated by the driver 5 is not used, because the driver 5 serves only to compare its operation parameters with the parameters of the driver 4. The failure of any of the formers , as well as a breakdown of an element of the input key module 3, determine the failure or inability to start the control module 7. In the event of a mismatch of signals KT1 and KT2 of a certain duration, an automatic a malfunction of the control module 7 (translates into a stable inoperative state), which blocks the passage of the FMS. In this case, the generator and start-up module 6 with a certain frequency generates restart signals for a predetermined time. If during this time control module 7 did not start, the synthesizer is excluded from the system; it will be possible to restart it only if the operator performs certain actions. When the control module 7 is operating, the FMS from its output is fed to the input of the power amplifier 8 and the input of the display and diagnostic module 12. The power amplifier 8 amplifies the FMS and gives it to the output of the synthesizer. The display and diagnostic module 12 decodes the FMS and indicates the code combination number.

If there is a predetermined level of the dynamic signal at the output of the main synthesizer, the arbiter 10 through the key 11 ensures its passage to the FS-EN output. In the absence of a signal at the output of the main synthesizer 1 and a signal at the output of the backup synthesizer 2, the arbiter 10 connects the FS-EH output to the output of the backup synthesizer 2. In addition, the arbiter 10 controls the diagnostic outputs D1 and D2, the state of which reflects the health of synthesizers 1 and 2 , respectively.

FS-EN starts to perform its functions after a time not exceeding 30 s from the moment of power-up. In the event of a power interruption for a period of not more than 1.3 s, the FS-EH switches off and resumes functioning for a time not exceeding 3 s from the moment the power is restored.

Claims (1)

The signal generator of the continuous channel of a multi-valued automatic locomotive signaling system consists of two two-channel main and backup synthesizers, operating in parallel, each of which is controlled by its own control circuit, an arbiter, which switches the synthesizers from the main to the backup using a key, and each synthesizer contains a generator module and launch, which drives the drivers of phase-shifted signals, the information content of which rykh is determined by the signals of the input key module, and generates a start signal for the control module, to the input of which there are paraphase signals of the control frequency and a phase-shift signal fed to the inputs of the indication and diagnostics module and power amplifier, which gives it to the output of the synthesizer.