JP2001180488A - Transmitter of automatic train control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a signal transmitter of an automatic train control device not allowing the temporary error of a transmitted telegraphic message to erroneously judge as a fixed transmission error near the boundary of two continuous transmitted telegraphic messages. SOLUTION: This device 10 transmits a transmitting telegraphic message S1 to a route circuit T of a railroad, and comprises a telegraphic message preparation part 11 for transmitting telegraphic message S1, an MSK modulating part 12 for converting the transmitting telegraphic message S1 into a transmitting signal, a transmitting signal amplifying part 13, and a normal relay 14 or 15 connected in series with each other. Also, a modulating part 16 for original message from the transmitting telegraphic message S1 at the amplifying part 13 and a transmission verifying part 60 by the original message are installed parallel with this series circuit. The transmission verification part 60 further comprises a telegraphic message bit collation part 61 by the transmitting telegraphic message, an error judging part 62 by the results of the collation, a bit error counter 63, and a telegraphic message boundary judging part 64 for transmitting telegraphic message.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic train control device for creating various messages necessary for train control of a railway, transmitting the respective messages to the train via a railway line, and detecting and controlling the train. Related to a transmission device.

[0002]

2. Description of the Related Art FIG. 6 is a diagram for explaining the principle of an automatic train control device. Generally, a plurality of trains T in railway traffic
There is known an automatic train control device that can individually control R, TR,... While traveling on a track. The automatic train control device has a transmitting device 110 for transmitting a predetermined transmission message S1 to each track circuit T of a track, and a ground receiving device 120 for receiving the transmission message S1 as a reception message S2 via a track circuit. are doing.

[0003] Such a transmitting device 110 and a ground receiving device 120 are respectively connected to each track circuit T, and a plurality of sets of these are arranged as a transmitting / receiving device 140 in an equipment room beside a track. Further, since the on-vehicle receiving device 150 is mounted on each train TR, the train TR can receive various electronic messages from the transmitting device 110 via each track circuit T.

[0004] A transmission message relating to this train control is as follows.
For example, information indicating a track circuit T on which a train is traveling, information S3 indicating a train course at a branch point obtained from an interlocking device (not shown), information indicating the position of a preceding train via another ground receiving device There is S4. Each transmitting / receiving device 140
It is connected to a local area network (LAN) 190, through which information S3 relating to message creation is introduced from an interlocking device or the like via the LAN, and information S4 relating to predetermined train detection is reported.

[0005] Ground receiving device 120 and on-vehicle receiving device 1
At 50, the received signal S2 or S1 is decoded to obtain a received message, and it is verified that the received message has been correctly transmitted for each received message. For this reason, the ground receiving device 120 determines the safety of train detection based on a normal message,
The on-vehicle receiving device 150 can ensure the safety of train control.

FIG. 7 is a time chart of one transmission example of the transmission device shown in FIG. In this transmission example, the telegrams 1 to 7 are transmitted in order, and the telegrams 1 and 2 are normal, but the telegrams 3 to 7 have errors. Generally, errors in the transmission message include a fixed device failure of the transmission / reception device 140 itself (so-called hard error) and a temporary error due to an external factor unrelated to its internal function (so-called soft error).

[0007] Of these errors in transmission messages 3 to 7, it is assumed that the error in transmission message 3 is temporary. For example, the train TR enters the adjacent track circuit T,
Alternatively, when the wheels advance beyond the joints of the rails, the impedance of the track circuit T sharply drops, so that the transmission output level fluctuates transiently. Also, a train current, which is a current for driving a vehicle, may be mixed as noise into a transmission signal. Due to these factors, an error in the transmission message may be detected.

Since such level fluctuations and noises are temporary, normal recovery can be immediately performed, for example, by supplementing the train control during that time with the next transmission message. Therefore, if a temporary error is detected in one transmission message 3, it is ignored, but if errors are detected in two transmission messages 3 and 4 successively, it is determined that a fixed error has continued (or recurred). Assuming that the transmission error is reported based on the second error.

In other words, in the test of the transmission signal,
In the case of a temporary error, a predetermined normal recovery process is performed, and only a fixed error is determined and reported, so that sufficiently safe train control can be realized by a reasonable and flexible transmission test. .

[0010] In addition, a configuration may be adopted in which a fixed period corresponding to three or four consecutive electronic messages is uniformly monitored. According to such a configuration, if the error continues even after the fixed period has elapsed, a relatively simple configuration for determining this as a transmission error can be provided.

[0011]

However, the transmission device of the above-mentioned conventional automatic train control device has the following problems. Even if it is a temporary error, if one failure factor occurs near the boundary between two adjacent telegrams, the effect may extend to both telegrams across the telegram boundary.

For this reason, if an abnormality occurs near the message boundary,
In some cases, two errors are detected for two consecutive messages. In this case, even though the error is a temporary error, it is determined that the error is a fixed transmission error.

Further, in a configuration in which the continuation of an error is monitored at intervals of a certain period, a normal transmission message cannot be ascertained unless the test result is uniformly waited. For this reason, even if the transmission error can be determined by the second message at the latest, it is not possible to take measures for the determined transmission error until this fixed period has elapsed.

It is an object of the present invention to provide an automatic train control apparatus which does not mistakenly determine a temporary transmission error as a fixed transmission error even if a temporary transmission error occurs near the boundary between two consecutive transmission messages. To provide a transmission device.

[0015]

In order to solve the above-mentioned problems, a transmitting device of an automatic train control device according to the present invention creates a plurality of messages relating to train control and transmits each of the messages sequentially to a track circuit of a railway line. And a transmission failure determining unit that determines a transmission abnormality only when two consecutive messages transmitted by the message transmitting unit successively result in an error. Only when the end of the preceding telegram and the beginning of the following telegram have an error, the transmission abnormality is determined if the third subsequent telegram has an error.

According to this transmission device, while two messages are transmitted one after another by the message transmission unit, the transmission failure determination unit specifies adjacent portions of both messages. Then, even if an error occurs in both adjacent messages in these adjacent portions, the error is regarded as a single message error. For this reason, abnormalities caused by respective failure factors are monitored at intervals, and only truly fixed transmission errors are selectively determined.

According to a second aspect of the present invention, in the transmission device of the automatic train control device, the transmission failure determination means compares bit information between a message transmitted to the track circuit and a predetermined reference message. And According to this, even if it is a sporadic and rare bit error, a transmission error is reliably determined.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The same parts as those of the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.
FIG. 1 is a block diagram of a configuration example of a transmission device of an automatic train control device according to an embodiment of the present invention. This transmitting device 1
0 is for transmitting the transmission message S1 to the track circuit T of the railway line.

Then, such transmitting devices 10, 10
And two terrestrial receivers 20, 20 for receiving the received telegram S2 from the track circuit T, respectively.
The two systems are connected to a transmission / reception device of an interlocking device or another track circuit (not shown) and transmission processing devices 30 and 30 for performing transmission control via the LAN while performing substantially the same internal processing in parallel. The transmission / reception device 40 of the automatic train control device is configured. The ground receiving device 20 constitutes a ground receiver according to the present invention.

According to the transmission / reception device 40, the train position information S4 is introduced from the transmission / reception device of another track circuit, and the train route information S4 is introduced from the interlocking device, and is provided for creating the transmission message S1. . Further, according to the evaluation result of the received message S2, the train position information S4 is transmitted to a transmission / reception device or an interlocking device of another track circuit. In addition, one system of the duplex configuration is referred to as a first system, and the other system is referred to as a second system.

Each transmission device 10 transmits a transmission message S1
A message generating unit 11, an MSK (Minimum phase shift keying) modulator 12 for converting the transmission message S1 into a transmission signal,
The transmission signal amplifier 13 and the normal relay 14 or 15 described above are configured in series. Also, in parallel with this serial configuration, an original text demodulation unit 16 based on the transmission message S1 is provided.
And a transmission verification unit 60 based on the original text. The message generator 11, the MSK modulator 12, the amplifier 13, and the normal relay 14 or 15 constitute a message transmitter according to the present invention, and the demodulator 16 and the transmission tester 60 constitute a transmission failure determiner according to the present invention. .

Normally, a normal relay (CO
(Referred to as R), the train detection by the transmission system 10 of the first system is performed by the excitation of the system 14, and the normal relay 14 is dropped when any device failure is determined in the first system. At this time,
If the normal relay (SKR) 15 of the second system is excited, the transmission control is switched to the transmission device 10 of the second system in the standby state. Further, even if a failure occurs in one of the ground receiving apparatuses (system 1) 20, the other ground receiving apparatus (system 2) 20 in the parallel dual configuration functions. Therefore, train control is not interrupted.

The train TR running on the track is equipped with an on-board receiver 40 for receiving the transmission message S1 from the track circuit T. The on-vehicle receiver 40 constitutes the on-vehicle receiver according to the present invention. As such a train TR, any train that performs train control while traveling along a certain route may be used. Hereinafter, a general railway train will be described as an example.

FIG. 2 is a block diagram showing an example of the configuration of the transmission verification section shown in FIG. The transmission verification unit 60 transmits the transmission message S
1 includes an information test system 60A that tests the information content and a signal test system 60B that tests the effective signal level of the transmission signal. The information verification system 60A includes a message bit collating unit 61 based on the transmission message S1, an error determining unit 62 based on the collation result, a bit error error counter 63,
And a message boundary determination unit 64 for the transmission message S1.

The signal test system 60B includes a level determining section 65 for the effective component and a timer 66 for a predetermined time.
And Then, the information test system 60A and the signal test system 60B evaluate the information contents and the test result of the signal level to determine a transmission error and determine a transmission error.
9 are shared.

Next, the operation of each section of the transmission verification section 60 will be described. The original of the transmission telegram S1 returned via the demodulation unit 16 is used as a verification target of the transmission verification, and is introduced into the telegram bit collation unit 61 and the telegram boundary determination unit 64. Then, in the message bit collating unit 61, the original of the transmission message S1 is introduced in advance from the message creating unit 11 as a reference message, and the reference message and the transmission message S1 are introduced.
The bit information of both telegrams are compared with each other.

The error judging section 62 reports the coincidence of the two telegrams based on the collation result of the telegram bit collating section 61 or reports the bit error occurrence position in the original text together with the non-coincidence to the error counter 63. At this time, an error occurrence position may be notified together with an error correction unit (not shown), and, for example, a 1-bit error may be immediately corrected according to an error correction code.

The message boundary determining unit 64 specifies the beginning and end of each original sentence and determines that it is a boundary area between the original sentence and the surrounding sentence. Then, the error counter 63 is notified of the bit positions on the message corresponding to these boundary areas. For simplicity, this notification process may be synchronized with the processing cycle of the message bit collating unit 61 and the error determining unit 62.

The error counter 63 counts the number of original texts in which a bit error has occurred. If the count value is 1, the transmission error may be temporary due to an external factor. Therefore, as described above, normal recovery can be immediately performed by complementing the transmission error with the subsequent transmission message S1 or the like. Therefore, only when the count value becomes 2, the transmission failure determination unit 69 is notified of the fact.

First, the bit error occurrence position reported by the error judgment unit 62 is compared with the bit position of each boundary area notified by the message boundary judgment unit 64. And
A bit error occurring in each boundary area is ignored, but if any bit error is found in any other bit position, it is detected as an error and the original text is counted by the error counter 63.

The level determining section 65 determines whether or not the above-mentioned effective transmission level has reached a predetermined value. Then, the timer 66 is notified of a normal state if it has reached the predetermined value, and an abnormal state if not. Timer 66
Then, it is confirmed that the normal state is maintained for a certain period of time, and otherwise, a level error is notified to the transmission failure determination unit 69. For example, the transmission voltage may be attenuated.

At this time, the transmission failure judging section 69 sets the timer 6
Alternatively, whether or not the normal transmission level has been maintained for a certain period of time may be evaluated based on the notification from 6. In this case, if the maintenance of the transmission level does not reach a predetermined criterion, a transmission error can be reported, and more accurate transmission processing can be performed.

FIG. 3 is a time chart of one transmission example of the transmission apparatus shown in FIG. In this transmission example, transmission messages 1, 2
And transmission messages 5 to 7 are normal, and transmission message 3,
No. 4 involves a temporary error at the message boundary. According to this, the error determination unit 62 determines that the two transmission messages 3, 4
Are notified to the error counter 63 of the bit error occurrence positions E1 and E2 in.

Further, the message boundary determining unit 64 determines that the transmission message 2
The bit position of each of the boundary regions R1 to R3 is notified to the error counter 63. Then, the error counter 63
Collate the bit positions of the occurrence positions E1 and E2 with the respective boundary regions R1 to R3. As a result, it is determined that the bit error occurrence positions E1 and E2 are within the boundary region R2 of the transmission messages 3 and 4. judge.

According to this, two transmission messages 3,
4 caused a bit error, but this event is simply set to the count value of 1. Therefore, depending on the count value, the transmission failure determination unit 69 does not report any transmission error, and reports that the transmission is normal. Therefore, it is understood that these bit errors are temporary, and when normal transmission messages 5 to 7 arrive thereafter, while clearing the count value of the error counter 63, these transmission messages 5 to 7 are cleared. The transmission can be continued as before.

FIG. 4 is a time chart of another transmission example of the transmission apparatus shown in FIG. In this transmission example, transmission messages 1 and 2 are normal, and transmission messages 3 to 7 involve a fixed transmission error. According to this, the error counter 63 indicates the bit error occurrence position E of the transmission messages 3 and 4.
Although it is determined that 1 and 2 are within the boundary region R2, it is determined that another bit error occurrence position E3 in the transmission message 4 is outside the boundary region R2 and R3.

Since another bit error has occurred in the body of the transmission message 4 following the boundary region R2, it can be seen that the error state has continued for a certain period of time or has recurred. Therefore, based on this, the error counter 63
Counts these events as a count value of two. Then, the transmission failure determination unit 69 reports a transmission error using the count value of 2.

Therefore, the bit error at the occurrence position E2 is
Although it is ignored as following the bit error at the occurrence position E1, the subsequent occurrence position E3 (or the boundary region R3
), A truly fixed transmission error is reported without error.

FIG. 5 is a time chart of still another transmission example of the transmission apparatus shown in FIG. (A) shows the transmission message of the first system, (B) shows the transmission message of the second system, and (C) shows the operation of the normal relay of the first system. In this transmission example, the transmission message 1-1 to the transmission message 1-6 correspond to the transmission device 10 of the first system.
And the transmission message 2-1 to the transmission message 2-6 are created by the transmission device 10 of the second system.

According to this transmission example, first, the transmission message 1-
1 to 1-3 are transmitted to the track circuit T. that time,
Since a failure has occurred in the transmission device 10 of the first system (timing T1), the transmission message 1-2 to the transmission message 1-
An error has occurred by 6. Then, the transmission verification unit 60 of the transmission device 10 of the first system determines a transmission error based on the second error detection based on the transmission message 1-3.

For this reason, the normal relay (C
(OR) 14 falls, and the transmission device 10 asynchronously switches from system 1 to system 2 (timing T2). Thereafter, the transmission messages 1-4 to 1-6 of the first system are not transmitted to the track circuit T, but the transmission messages 2-6 to 2-6 of the second system are transmitted instead.

At this time, with the fall of the normal relay 14 and the excitation of another normal relay 15, a temporary non-conductive state specific to the relay circuit may occur in the transmission line including each relay contact. . In this case, a sudden change in transmission impedance occurs due to the disconnection of the load on the transmission line, and a normal transmission message 2-3 or 2-4 of the second system.
May cause temporary errors.

However, in the transmission verification unit 60 of the transmission system 10 of the second system, the boundary region R2 between the transmission messages 2-3 and 2-4 is determined.
This temporary error is not detected repeatedly over two transmission messages 2-3 and 2-4. Therefore, the transmission device 10 of the second system does not erroneously determine a transmission error, so that the subsequent normal transmission messages 2-5 and 2-6 can be continuously transmitted to the track circuit T.

[0044]

As described above, according to the present invention,
A boundary area between two consecutive transmission messages is specified, and a temporary error of the transmission message is not redundantly detected in the boundary area. Therefore, it is possible to provide a transmission device of an automatic train control device that does not make an erroneous determination as if it were a fixed transmission error. Further, according to the apparatus described in claim 2 of the present invention, it can be applied to a transmission apparatus having a duplex configuration.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration example of a transmission device of an automatic train control device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a configuration example of a transmission verification unit shown in FIG. 1;

FIG. 3 is a time chart of one transmission example of the transmission device shown in FIG. 1;

FIG. 4 is a time chart of another transmission example of the transmission device shown in FIG. 1;

FIG. 5 is a time chart of still another transmission example of the transmission device shown in FIG. 1;

FIG. 6 illustrates a general automatic train control device.

FIG. 7 is a time chart of one transmission example in the transmission device shown in FIG. 6;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Transmission apparatus, 20 ... Ground receiving apparatus, 30 ... Transmission processing apparatus, 11 ... Message creation part, 12 ... MSK modulation part,
Reference numeral 13: amplifying unit, 14, 15: normal relay, 16: demodulating unit, 40: transmitting / receiving device, 50: on-board receiving device, 60
... Transmission verification unit, 60A ... Information verification system, 61 ... Message bit collation unit, 62 ... Error determination unit, 63 ... Error counter, 64 ... Message boundary determination unit, 65 ..Level determining section, 66... Timer, 69... Transmission failure determining section, S1.
Transmission message, S2: reception message, S3: information, S4: report, T: track circuit, TR: train.

Claims (2)

[Claims] 1. A plurality of messages relating to train control are created,
A message transmitting means for sequentially transmitting each message to a track circuit of a railway line; and a transmission failure determining means for determining a transmission abnormality when two consecutive messages transmitted by the message transmitting means successively cause an error. Only when the end of the preceding message of the two consecutive messages and the beginning of the following message result in an error,
A transmission device of an automatic train control device configured to determine a transmission abnormality when a third subsequent message causes an error. 2. The transmission apparatus according to claim 1, wherein the transmission failure determination unit collates bit information between a message transmitted to the track circuit and a predetermined message serving as a reference. .