JP2000095110A - Transceiver for atc system earth station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transceiver equipped with a control command processing device and a transmission signal output device in an ATC earth station so as not to generate induced noise that may hampers logic processing when switching between transmission routes for alternating transmission signals. SOLUTION: An output device 2 has a generator section 21 for generating a transmission signal in accordance with a control command and a switching section 22 for switching the output route for the transmission signal. Processing means 1 is provided with a sequencer that instructs the generator section to output a suppression command for a predetermined time when the control command is deciphered, and during this time instructs the switching section to issue a switching command. The switching section 22 preferably comprises one electrical contact for sending the transmission signal of the alternative current to the movable body, the other electrical contact for sending it to a predetermined dummy load 23b, and a relay circuit 22B for connecting either one of the electrical contacts to the common terminal in accordance with the switching command. The output device 2 is configured at least by multiplexing the generator section 21 and the switching section 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission / reception apparatus of an ATC system ground station for controlling traffic from a remote place to a traveling vehicle such as a train or a moving body such as a linear motor car from a remote place.

[0002]

2. Description of the Related Art Conventionally, an automatic train control device (hereinafter referred to as A
A ground station (referred to as a TC system) is installed at a remote control center or the like, thereby mutually communicating with mobile stations arranged in various vehicles, and intensively performing safe operation control of the vehicles. In recent years, as the speed of vehicles has increased, computers for processing control commands have generally been computerized, and safety has been reliably ensured by multiplexing of components and fail-safe operation control.

FIG. 5 is a configuration diagram of a conventional ATC system ground station. The ATC system ground station shown in FIG. 5 includes electronic interlocking devices 210M and 210S for all sections including a main system and a sub-system in a railway network having a plurality of routes including a plurality of sections.
10M, 210S, which are connected to the main and sub system interface devices via a private line (hereinafter abbreviated as I
F devices) 220M, 220S and transmission / reception devices SRB1, SRB2, SRB3,.
(SRB1 is shown in the figure).

Each transmitting / receiving device (for example, SRB1)
Includes a transmission circuit group 230 formed as a microcomputer.
M, 230S are provided, each of which is a main system 230S for each section.
.. And the subsystems 230S,. The input terminals of the transmission circuit groups 230M and 230S are connected to the respective IF devices 220M and 220S via a private line.
And a track circuit of each section including a rail is connected to an output end thereof via a transmission line and a matching transformer MT.

[0005] Conventionally, the transmission path is generally 600
We frequently use Ω communication cables. Also, like this:
Since each device has a duplex configuration, a highly reliable fail-safe ATC system ground station can be realized.

According to the ATC system, the electronic interlocking devices 210M and 210S control the operation control of the entire route in an integrated manner and exchange information with other management systems via a communication network (not shown). In addition, the IF devices 220M and 220S perform transmission control on the route of each system. At the same time, the control contents for the train in progress are determined by the respective transmitting / receiving devices SRB1, SRB2, SRB3,.
A transmission signal is formed by modulating a band carrier.

Therefore, if this transmission signal is transmitted to the track circuit via the transmission line and received by the ATC receiver mounted on the train, the traveling speed and the braking amount can be controlled based on the control contents, Operation control of multiple sections can be performed from the equipment room.

In the transmission control by the ATC system, a transmission signal is allowed to flow through a track circuit of a specific section only when the train enters a specific section and needs to be controlled. It is prohibited to transmit a transmission signal for speed control or the like to the track circuit in a section where there is no section. Therefore, a dedicated switching relay circuit is provided at the transmission circuit output stage of the transmission signal, and transmission of the transmission signal is controlled on / off for each track circuit in each section.

[0009] In this case, the impedance of the track circuit depends on whether the wiring length of the intermediate portion and the laying length of the rail are different,
It changes with the sleepers and paving stones that are wet due to rainfall, but it is extremely low at about 2 to 10Ω in the AF band for normal operation. However, it is necessary to transmit the transmission signal while guaranteeing the input level of the ATC receiving circuit on the train.

Therefore, the output of each of the transmission circuits 230M and 230S should be at least 10 in consideration of the transmission loss of each section.
It is necessary to secure about W. For this reason, in the transmission path of the 600Ω communication cable, the output voltage of the transmission signal is about 7 although it is considerably higher than the TTL level of the transmission circuit.
7V and its output current is set to about 0.13A.

[0011]

However, the transmitter / receiver of the conventional ATC system ground station has the following problems. When the relay circuit turns on and off a transmission signal having an output of several tens of volts, the electrical contact greatly exceeds this output and instantaneously several times to ten times due to the inductive load of the transmission line including the matching transformer. A surge waveform of a voltage that reaches several times occurs.

For this reason, the surge voltage may act as a large induction noise on the input / output unit of the microprocessor or the like, thereby preventing correct logic processing of various control commands. For example, in the case of a dual system logic process that should be fail-safe, the signal synchronization check circuit may detect a synchronization mismatch between the two systems,
At this time, the traffic control stops.

In general, to suppress such inductive noise and the like, a low-pass filter is inserted in the middle of an important signal line or the like. However, a large number of signal lines are provided as in the input / output section described above. Was not suitable for the part. Further, since the switching of the high voltage relay circuit is synchronized with other logic processing, there is a difficult problem that prevention of malfunction is extremely unavoidable, and removal of these problems has been an important problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a transmission / reception apparatus for an ATC system ground station which does not generate an induction noise which hinders logical processing when switching a transmission path of an AC transmission signal. To provide.

[0015]

In order to solve the above-mentioned problems, a transmitting / receiving apparatus for an ATC system ground station according to the present invention comprises a processing unit for a control command for a mobile unit, and a means for outputting a transmission signal corresponding to the control command. In a transmitting / receiving device of an ATC system ground station for controlling the operation of a mobile unit in a corresponding section based on a control command, an output means includes: a generation unit for a transmission signal in accordance with the control command; A transmission path switching unit for the transmission signal is provided. When the control command is decoded, the processing unit transmits the suppression signal to the transmission signal generation unit for a predetermined period while transmitting the suppression signal within the predetermined period. A sequencer for instructing the signal switching unit to transmit a switching signal is provided, and the transmission path is switched while suppressing the transmission signal.

For this reason, when a predetermined control command is decoded by the processing means, a transmission signal corresponding to the control command is formed by the generating section, and the sequencer of the processing means sends a suppression signal to the transmission signal. , The transmission of the transmission signal to the switching unit by the generating unit can be temporarily suppressed. Subsequently, while the transmission of the suppression signal is continued for a predetermined period by the sequencer,
In order to instruct the transmission of the switching signal within the predetermined period, the switching unit switches only the transmission path to the corresponding section without introducing the transmission signal. Furthermore, since the sequencer instructs to stop sending the suppression signal after the elapse of a predetermined period, the transmission signal can be sent from the generation unit to the corresponding section via the switching unit, and the mobile unit in the section can be operated and controlled based on the control command. .

According to a second aspect of the present invention, the switching unit of the transmission / reception apparatus includes one of an electrical contact for transmitting an AC transmission signal toward the moving object and another electrical contact for transmitting the AC transmission signal to a predetermined pseudo load. And a relay circuit for connecting one of the electrical contacts to a common terminal in accordance with the switching signal.

According to this, a general switching section including a relay circuit can be realized.

According to a third aspect of the present invention, the output means of the transmission / reception apparatus is characterized in that at least a transmission signal generation section and a transmission path switching section are multiplexed.

According to this, it is possible to realize an output means having a multiplex configuration which can easily cope with the occurrence of a failure.

[0021]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The same parts as those in the conventional example are denoted by the same reference numerals, and detailed description is omitted. FIG.
1 is a configuration diagram of a transmitting / receiving device of an ATC system ground station according to an embodiment of the present invention. In the embodiment shown in FIG.
A plurality of processing means 1 for a control command for a train or the like and an output means 2 for a transmission signal SO corresponding to the control command are provided as a main part of a duplex configuration composed of a main system M and a sub system S. The transmission / reception device 100 in the ATC system ground station is configured. Further, in addition to the above, one having a single main part or a simple configuration of only the main system M may be used.

The transmission signal SO is accompanied by so-called display information, and is a route (a so-called line section such as a XX Shinkansen).
A desired traveling speed, a braking amount, etc. are instructed based on the current position of the train for each section (so-called block and control unit of the line section), and the information frame is formed in a predetermined transmission format. is there. In addition, a TD signal for obtaining so-called line information may be used, and this TD signal forms an information frame for detecting a train in a corresponding section.

In this way, the operation control of the mobile unit in the corresponding section is performed based on the control command, and the two pieces of processing information by the main system M and the sub system S are collated. To continue traffic control. If a mismatch occurs due to some kind of failure, the system is switched to the correct processing information system M or S, or a predetermined secure error processing is performed. That is,
Fail-safe operation control can be realized.

Then, for example, each means 1,
Two units are mounted on a printed circuit board, and each board is housed in one independent housing and installed in the equipment room of the ATC system ground station. The input / output terminals on the processing means 1 side of each substrate are sequentially connected to the main and sub system interface devices 220M and 220S and the electronic interlocking devices 210M and 210S via a local line such as a LAN. Further, a transmission path for each section is connected to the output end of the output means 2 of each substrate.

Thus, the number of boards can be increased or decreased in accordance with the addition or reduction of sections, and when any of the means 1 and 2 fails, maintenance can be performed by replacing boards for each section. it can. Hereinafter, the configuration of the main system M will be mainly described, but the same applies to the sub system S.

The output means 1 includes a generation unit 21 for a transmission signal SO in accordance with a control command, a switching unit 22 for two transmission paths for the transmission signal SO, and a test path for one of the transmission paths. A standby test circuit 23 is provided. Further, the generating unit 21 is provided with a complex wave S with a digital signal processor.
An ATC oscillator 21A for S and a differential output ATC amplifier 21B for pulse width modulation of the composite wave SS. The ATC amplifier 21B has a signal input terminal of an output inhibition gate for signal output. Also, a single output type may be used as long as the drift is sufficiently compensated.

The switching section 22 includes a fail-safe input / output port 22A for transmitting the switching signal XC and a double-cut parallel relay circuit 22B according to the switching signal XC. The fail-safe input / output port 22A has two outputs. One output terminal is connected to a drive unit (not shown) of the relay circuit 22B, and the other output terminal is connected to a signal input terminal of the ATC amplifier 21B. As the relay circuit 22B, for example, each of the contacts may be switched by an electromagnetic solenoid, or an electronic non-contact relay may be used.

The two common terminals of the relay circuit 22B include:
The two differential output terminals of the ATC amplifier 21B are connected to each other, and the two make terminals are connected via the dummy load 23B of the standby test circuit 23. Also, the relay circuit 22
The two break contacts B are drawn out of the transmission / reception device 100 and connected to both input terminals of the matching transformer 24 for the track circuit.

The standby test circuit 23 has its pseudo load 23B
Is used as a transmission line. For example, if a conventional general communication cable is used as the transmission line, the line impedance becomes about 600Ω. For this reason, the impedance of the dummy load 23B is set to a pure resistance in which the impedance is set to a similar value. In addition, the transmission line impedance may be made closer to the track circuit, and a transmission line with a lower line impedance of 150 to 200Ω may be used. More preferably, the transmission line and the matching transformer 24 are taken into consideration. The dummy load 23B may be inductive.

The load on the track circuit changes to about 2 to 10 Ω due to the difference in the wiring lengths of the wirings and rails in the intermediate portion and the drying of the sleepers and paving stones wet by rainfall. Also, since it is necessary to guarantee the input level of the ATC receiving circuit, it is necessary to secure at least about 10 W as the output of the ATC amplifier 21B in consideration of the power loss of each unit. Therefore, it is necessary to set the output voltage applied to the 600Ω transmission line to about 77V (square root of 10W multiplied by 600Ω) and the output current to about 0.13A.

The standby test circuit 23 may not be provided, and the relay circuit 22B and the standby test circuit 23 may be disposed separately from the output unit 2 so that the output of the main system M and the output of the sub system S can be reduced. It may be a common part for the means 2 and 2, thereby reducing the number of mounted components such as the relay circuit 22B and making the device small and inexpensive.

The processing unit 1 includes a control processing unit 11 for the entire main system M, another processing unit 1 for the sub system S, and another fail-safe input / output port for serial communication with the above-described IF devices 220M and 220S. The dedicated software performs transmission signal processing for the corresponding section, train detection processing in this section, and the like.

Further, the control processing unit 11 includes a microprocessor, a control memory for operation control and a working memory,
Other peripheral circuits are connected by a bus. Further, the software forms a sequencer for managing the transmission operation of the transmission signal SO in a time-series manner. The sequencer sets the execution order of each processing in the transmission operation in advance. Can instruct the control processing unit 11 to execute each process.
Note that the sequencer is provided with a plurality of soft timers.

Next, the transmission operation of the transmission signal SO by the sequencer will be described. As a prerequisite, the sequence of performing the sending operation is programmed in the sequencer using an input panel (not shown) including ten keys and some control keys. Alternatively, the aforementioned electronic interlocking device 210M,
The program may be programmed from the host system by 210S or from a monitor device (not shown) via IF devices 220M and 220S.

FIG. 2 is a flowchart of the transmission signal transmission operation of the control processing unit shown in FIG. 1, and FIG. 3 is a time chart of the transmission operation. As shown in FIG. 2, when a predetermined first control command arrives from IF devices 220M and 220S and interrupt processing is performed, the sequencer sends reception processing ST1 of the first control command to control processing unit 11. An instruction is issued to start transmission of the transmission signal SO.

Note that the ATC amplifier 21B has
A predetermined test signal is sent to the standby test circuit 23 via the relay circuit 22B. As the test signal, a signal having a frequency equal to that of the transmission signal SO including the carrier and having a slightly smaller amplitude than that of the transmission signal SO is desirable. Thus, while reducing the power loss due to the pseudo load 23B,
Test (check) the frequency and output level of the transmission signal SO
it can.

The first control command is basic information for forming the above-mentioned transmission signal SO. For the adjacent sections or several sections for interlocking the operation control, the contents of transmission of the transmission signal SO and notes on approaching trains, etc. Is command information that is collectively formed in an information frame.

In the receiving process ST1, the control processing unit 11 receives the first control command, decodes the content of the command, and performs the present control (for example, the determination of the command speed) based on a predetermined connection logic between the sections. , Various parameters for forming the composite wave SS are determined. Then, the parameter indicating the predetermined frequency is transferred to the ATC oscillator 21A via the data bus and the digital signal processor of the generating unit 21A, and the parameter indicating the predetermined output level is similarly transferred to the ATC amplifier 21B.

When each parameter is passed, the sequencer controls the complex wave SS forming process ST2 by the control processing unit 11
To the ATC oscillator 21A and the ATC amplifier 2
By 1B, a transmission signal SO of the control content according to the first control command is formed. Subsequently, the management unit instructs the control processing unit 11 to perform the inspection process ST3 of the transmission signal SO.

In the inspection process ST3 of the transmission signal SO,
The control processing unit 11 compares (checks) the frequency and output level of the transmission signal SO with expected values of each parameter,
If the collation result indicates an error, a predetermined error process is performed to avoid a failure. Each expected value is set as a predetermined range in the level control process in advance.

Normally, since this collation result indicates normal,
The sequencer sends a control command CC to the control processing unit 11 to instruct the generation process ST4 of the suppression signal SC for the transmission signal SO. Generation processing ST of this suppression signal SC
4, in the fail-safe input / output port 22A,
The suppression signal SC is transmitted to the ATC amplifier 21B, and when the ATC amplifier 21B introduces the suppression signal SC, the transmission of the transmission signal SO is temporarily stopped.

The suppression signal SC is a signal for continuing transmission for a first predetermined period set in advance, and its length is desirably 30 to 100 ms. If the first predetermined period is less than 30 ms, the shortest system timing of the control processing unit 11 cannot be reached, and if the first predetermined period is 100 ms or more, the on-board device mounted on the train determines that the transmission signal SO has ended. After that, normal traffic control cannot be continued.

Subsequently, when a second predetermined period elapses from the generation of the suppression signal SC, the sequencer generates the switching signal XC of the relay circuit 22B in the processing ST5.
To the control processing section 11, and sends the switching signal XC to the drive section of the relay circuit 22B through the fail-safe input / output port 22A. Then, the transmission path of the transmission signal SO can be switched to the transmission path by the relay circuit 22B.

As the second predetermined period, it is desirable to select and set an intermediate value of the first predetermined period.
As a result, the ATC amplifier 21B transmits the switching signal XC after sufficiently stabilizing the transmission suspension state of the transmission signal SO, and the relay circuit 22B transmits the transmission signal SO after sufficiently stabilizing the switching state of the contact. it can. In addition to the first and second predetermined periods, the respective predetermined periods are set in a soft timer built in the sequencer to perform counting management.

When the first predetermined period for the suppression signal SC has elapsed, the sequencer instructs the control processing section 11 to perform an erasing process ST6 of the suppression signal SC, and the fail-safe input / output port 22A controls the ATC amplifier 21B. The transmission of the signal SC is stopped. This completes the sequence management of the sending operation by the sequencer. Thereby, in particular, even when the standby test circuit 23 is inductive, the switching contact switches without generating a high-voltage surge waveform, so that it is possible to prevent the occurrence of induced noise.

Next, the operation of releasing the transmission signal SO by the sequencer will be described. FIG. 4 is a flowchart of a transmission signal release operation of the control processing unit shown in FIG. In addition,
In the time chart of the cancellation work, the transmission signal S shown in FIG.
Instead of O, a transmission signal SO that reversely switches from a large amplitude to a small amplitude is used.

In the release operation shown in FIG. 4, each process is started upon receiving a second control command for releasing transmission instead of the first control command. In the second control command, different from the first control command, various instructions in this section are terminated, and the ATC receiving device on the vehicle is released from the control by this device. Also, if necessary, it instructs an error recovery process or the like in the apparatus 100.

When the second control command arrives from the IF devices 220M and 220S and interrupt processing is performed, the sequencer instructs the control processing unit 11 to receive the second control command ST11. Start the cancellation work of. In the receiving process ST11, the present control and the command contents are analyzed in the same manner as in the transmission operation.
There is no need to change various parameters for

When the second control command is decoded, the sequencer checks the completion of transmission of the transmission signal SO by the sequencer ST22.
In the control processing unit 11, the control processing unit 11 again checks the frequency and output level of the transmission signal SO with the expected values of the parameters, and transmits the transmitted transmission data. Check the correctness of the signal SO.

When the normal state can be confirmed, the sequencer instructs the control processing section 11 to perform the above-described generation processing ST4 of the suppression signal SC. In the generation processing ST4 of the suppression signal SC, the fail-safe input / output ports 22A, AT
Via the C amplifier 21B, the transmission signal S is transmitted for a first predetermined period.
Pause the delivery of O. If an error has occurred, another predetermined error processing is performed.

When the second predetermined period elapses from the generation of the suppression signal SC, the sequencer instructs the control processing section 11 to perform an erasing process ST51 of the switching signal XC of the relay circuit 22B. In the erasing process ST51 of the switching signal XC, the transmission path of the transmission signal SO is switched to the standby test circuit 23 via the fail-safe input / output port 22A and the drive unit of the relay circuit 22B. For this reason, as in the case of the sending operation, it is possible to guarantee the stability of the sending pause state and the contact switching state.

After the first predetermined period has elapsed, the sequencer causes the control processing section 11 to execute the erasure processing ST of the suppression signal SC.
Indicate 6. In the erasing process ST6 of the suppression signal SC, the AT is transmitted via the fail-safe input / output port 22A.
The transmission of the transmission signal SO to the C amplifier 21B is released. As described above, the sequence management of the release operation by the sequencer is completed, and in particular, it is possible to prevent the generation of the induction noise accompanying the generation of the high voltage surge waveform caused by the inductive transmission line.

As a precondition for the sending operation, the duration of the transmission signal SO is set in the sequencer in advance as a third predetermined period, and arranged in a table corresponding to each control command. The unit 11 may be programmed. Thereby, the table is searched in accordance with the received control command, and when the soft timer of the sequencer has timed out after the lapse of the third predetermined period, the transmission signal SO release operation described above is triggered by this. it can.

In the case of this configuration, since the above-mentioned second control command is not required, the electronic interlocking devices 210M, 210M
S, the processing load on the operation management of the IF devices 220M and 220S can be reduced. Further, after the first control command is received, even if the second control command is not received, the sequence from transmission of the transmission signal SO to cancellation of transmission can be consistently processed only by the sequencer of the control processing unit 11, so that a series of transmissions The process can be performed continuously and more quickly.

[0055]

As described above, according to the present invention,
Even when the transmission path of the AC transmission signal is switched in the ATC system ground station, transmission of the transmission signal SO to the switching unit is temporarily stopped, so that transmission and reception that does not generate induced noise that hinders logical processing is performed. Equipment can be provided. Further, according to the device described in claim 2 of the present invention, it can be applied to a general device, and according to the device described in claim 3 of the present invention, reliability is further improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a transmitting / receiving device of an ATC system ground station according to an embodiment of the present invention;

FIG. 2 is a flowchart of a transmission signal transmission operation of a control processing unit shown in FIG. 1;

FIG. 3 is a time chart of a transmission signal transmission operation of the control processing unit shown in FIG. 1;

FIG. 4 is a flowchart of a transmission signal release operation of the control processing unit shown in FIG. 1;

FIG. 5 is a configuration diagram of an ATC system ground station according to a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Processing means, 2 ... Output means, 11 ... Control processing part, 1
2, 22A: fail-safe input / output port, 21: generating section, 21A: ATC oscillator, 21B: ATC amplifier, 22: switching section, 22B: relay circuit, 23: standby test circuit, 23B: pseudo load, 24: matching transformation Bowl, 100
... Transceiver, M ... Main system, S ... Sub system.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Teruo Sakai 1-13-8 Kamikizaki, Urawa-shi, Saitama F-term (reference) 5Y161 AA01 AA05 BB02 CC04 CC13 FF01 FF07

Claims (3)

[Claims] 1. A means for processing a control command for a moving body,
A transmitting and receiving device of an ATC system ground station for controlling the operation of a mobile unit in a corresponding section based on the control command, wherein the output means is configured to comply with the control command. And a switching unit for switching a transmission path for a transmission signal from the generation unit. When the control command is decoded, the processing unit suppresses the transmission signal generation unit for a predetermined period. An ATC system ground station provided with a sequencer for instructing transmission of a switching signal to a switching section of a transmission signal within the predetermined period while instructing signal transmission, and for switching a transmission path while suppressing the transmission signal. Transceiver. 2. The switching unit according to claim 1, wherein one of the electrical contacts for transmitting an AC transmission signal toward the mobile object and the other electrical contact for transmitting the signal to a predetermined dummy load. 2. The AT according to claim 1, further comprising a relay circuit connected to the common terminal according to the following.
Transmitter / receiver for C system ground station. 3. The transmission / reception apparatus for an ATC system ground station according to claim 1, wherein said output means comprises a multiplexed configuration of at least a transmission signal generation section and a transmission path switching section. .