JP5711622B2 - ATS-P ground unit with failure detection function - Google Patents

Description

  The present invention relates to an ATS-P ground element installed on a railroad track of a transponder type ATS (automatic train stop device) in a railroad security facility, and more specifically, information on a traffic signal display is directly received from a signal equipment box. The present invention relates to an ATS-P ground unit with a fault detection function in which the ATS-P (N) ground unit incorporated in the system is improved so as to detect a failure of a circuit or the like in its own device.

[Conventional Example 1] Railway companies are increasingly introducing ATS-P systems in order to improve driving safety. For example, in the case of East Japan Railway Company, a system combining a code processor (EC), a repeater (RP), and a power source ground unit is installed in a high-density line section in the Tokyo metropolitan area. In this system, a fail-safe computer is used for the code processor (EC), and in addition to fault diagnosis of the code processor (EC) itself, a relay (RP) It can detect a failure of a grounded power unit. This failure information is output to a maintenance area. Although this system has a high equipment cost, it can be used for operation management and railroad crossing control because it can receive information such as train numbers and decelerations from trains in 3.0 MHz information waves (for example, (See Patent Documents 1 and 2). Here, such systems ATS-PI to ATS-PIV (N) are called ATS-P systems with a repeater failure detection function.

FIG. 11 shows the structure of a conventional ATS-P system with a repeater failure detection function, where (a) is a schematic block diagram of ground equipment, and (b) is a block diagram of an ATS-P ground device with repeater failure detection function. (C) is a message frame configuration diagram. The repeater may be integrated with the ground unit, but here it is a separate body.
The ATS-P system with a repeater failure detection function (see FIG. 11A) includes an on-board device mounted on a train 12 traveling on a railroad track 11 and a repeater failure installed on the ground side. It consists of an ATS-P ground device with a detection function. The ground device is provided corresponding to the traffic light 13 and the instrument box 14 (signal device tool box), and is installed along the track 11.

This ATS-P ground device is composed of one code processor, one or more sets of repeaters and ground units, and the code processor supplies power DC135V to the repeaters and FSK (frequency shifter). It communicates with the repeater by keying) communication. The repeater and the ground unit are set as a one-to-one pair, and are installed at an appropriate distance from the traffic light 13.
The code processor inputs the traffic signal indication relays GR and YR from the instrument box 14 and sends the indication information and distance information to the traffic signal 13 to the repeater, and the repeater transmits the information via the ground unit. Since the transmission is performed using a 1.7 MHz radio wave, the on-board device of the train 12 that has traveled to the vehicle receives information useful for generating the speed check pattern P and performs train stop control. Note that information transmission from the on-board device to the ground device is performed by 3.0 MHz radio waves, but in the following description, reception of 3.0 MHz radio waves and information transmission are omitted.

Regarding the internal configuration of the ground device (see FIG. 11B), a transmission system to the on-vehicle device and a failure detection system useful for explaining the present invention will be described with the reception system from the on-vehicle device omitted.
The code processor determines whether the present of the traffic signal 13 is the G present, the Y present or the R present based on the signal present relays GR and YR, and the corresponding transmission message Ma (see FIG. 11C). A message generation means for generating the transmission message Ma, a modulation means for transmitting the transmission message Ma to the relay, a demodulation means for acquiring the received message Mb returned from the relay, the transmission message Ma and the reception message Mb, Comparing means for checking whether or not they match, and failure processing means for cutting off the power supply to the repeater if the repeater or ground unit fails if the matching result does not match And has.

In addition, the ground unit is equipped with a transmission coil 22 (information wave antenna) for transmitting information from the ground to the vehicle as an antenna suitable for transmission / reception of a 1.7 MHz radio wave, and a radio wave emitted from the transmission coil 22 for verification. Receiving coil 23 (transmission confirmation antenna).
Further, the repeater includes a modem that transmits / receives messages Ma and Mb to / from the code processor, and a modulation circuit that places the transmission message Ma on a 1.7 MHz carrier wave and appropriately amplifies the signal before transmitting it to the transmission coil 22. 21, a demodulating circuit 24 that restores a message from a received signal of the receiving coil 23 to generate a received message Mb, and a logic unit that stores a message for timing adjustment between the modem and the modulation circuit 21 and the demodulation circuit 24 And has.

  In such an ATS-P ground device with a repeater failure detection function, the transmission message Ma generated by the code processor is transmitted to the orbit 11 via the modulation circuit 21 of the repeater and the transmission coil 22 of the ground unit. And the received telegram Mb restored from the radio wave by the receiving coil 23 of the ground element and the demodulator circuit 24 of the repeater is returned from the repeater to the code processor. The received message Mb is collated. If the transmission message Ma and the reception message Mb match, it can be seen that the message transmission paths are all normal, whereas if both the messages Ma and Mb do not match, some part of the message transmission path fails. It turns out that

  Moreover, regarding safety based on failure detection, a fail-safe computer is adopted as the code processor to ensure the safety of the code processor, and in such a code processor, the transmission message Ma and the received message Mb Since the safety of the repeater and ground unit is also improved by performing the verification of the above, even if a single system computer is adopted for the logic part of the repeater, the failure detection is made accurately, so the ground device The whole is safe and fail-safe. The fail-safe computer may be, for example, a known multi-computer (for example, refer to Patent Document 1), where the outputs of two CPUs are compared at any time by a fail-safe comparison circuit (FS comparison circuit). Matching is performed. Further, the FS comparison circuit has a so-called pendulum circuit, and outputs an alternating signal whose value alternately changes at a constant period while the matching state continues, and a mismatch is detected in the comparison result. And outputting a constant signal whose value does not change is an example of a proven FS comparison circuit.

[Conventional Example 2] On the other hand, in a line area other than the high-density line area in the Tokyo metropolitan area, an ATS-P (N) ground element, which is a highly economical ATS-P ground element that does not require a code processor or a repeater, is used. The system was installed. The ATS-P (N) ground unit is a non-powered ground unit that transmits a telegram corresponding to the indication of the traffic signal to the train only when a 245 kHz power wave is received from the train (for example, Non-Patent Document 3, Patent Document 2). There is a telescope with a telegraphic check function that detects the failure of the main part of the ground element based on the telegraphic check (see, for example, Patent Document 3), but it is a device that operates only when a power wave is received. There is no output of the detection results to the maintenance area. Compared with the above-described ATS-P ground device with a repeater failure detection function having a code processor and a grounded power source ground device, the ATS-P (N) ground device has less than half the equipment cost. Here, such a ground element with a telegram checking function will be referred to as an ATS-P (N) ground element with a telegram checking function.

FIG. 12 shows the structure of a conventional ATS-P (N) ground unit 30 with a telegram checking function, (a) is a schematic block diagram of the ground equipment of the ATS-P (N) system, and (b) is a telegram checking function. Attached ATS-P (N) block diagram of the ground unit 30, (c) is a telegram frame configuration diagram.
The ATS-P (N) system (see FIG. 12A) also includes an on-board device mounted on the train 12 traveling on the railroad track 11 and an ATS-P (N) installed on the ground side. An ATS-P (N) ground unit that is connected to the instrument box 14 by a cable and can transmit a relay signal is provided along the track 11. Installed on the ground side.

  One or a plurality of ATS-P (N) ground elements are provided corresponding to the traffic light 13, and in the case of a plurality of the ground terminals, they are distributed and arranged at appropriate distances from the traffic light 13 (in FIG. The signal indication relays GR and YR are directly input from the instrument box 14 and the indication information and the distance information to the signal 13 are transmitted by 1.7 MHz radio waves. It has become. In addition, the ATS-P (N) ground element is a non-powered ground element, and when a 245 kHz power wave arrives from the on-board device of the train 12 that has traveled there, it receives it and receives operating power. It is supposed to occur. When the train 12 travels on the track 11 and approaches the ground unit 30, for example, the ground unit 30 obtains power from the 245 kHz power wave, and inputs the signal display relays GR and YR and transmits information radio waves. Do. For this reason, on routes that do not require information transmission from the on-board device to the ground device, it is used in the same sense as the ATS-S ground unit.

  The ATS-P (N) ground unit 30 with a telegram checking function is obtained by adding a failure detection function to the ATS-P (N) ground unit having such a basic configuration, and specifically (FIG. 12B). The transmission message Ma (see FIG. 12C) corresponding to the transmission signal Ma (see FIG. 12 (c)) is determined based on the signal signal relays GR and YR. A message selecting means 31 that reads and generates a non-transmission message Mc having the same contents from another ROM and generates the same message, and two identical messages Ma and Mc output from the plurality of message ROMs. The matching circuit 35 for matching, the above-described modulation circuit 21 and the transmission coil 22 adapted to a radio wave of 1.7 MHz, and the transmission telegram Ma are allowed to be sent to the vehicle by the modulation circuit 21 when matching is matched. Message when collation does not match And it comprises a failure processing circuit 36 to prohibit the output to the modulation circuit 21.

Further, the ground unit 30 generates operating power by rectification or the like from the reception coil 38 which is an electromagnetic wave antenna for power acquisition suitable for reception of a 245 kHz radio wave and the reception signal of the reception coil 38 in order to eliminate power supply. A power supply circuit 37 that supplies the units 21 and 31 to 36 is also provided.
Furthermore, the message selection means 31 sends out an appropriate address to each ROM, and a message storage unit 33 including three first to third message ROMs that store and hold a transmission message Ma and a non-transmission message Mc. The readout circuit 34 that outputs three transmission messages Ma and three non-transmission messages Mc and the G indication relay GR of the signal indication relays GR and YR output from the instrument box 14 is received by the relay relay GPR. At the same time, the Y relay YPR is received by the relay YPR, and three transmission messages Ma are made in the relay circuit of the first contact GPR1 and the second contact GPR2 of the relay GPR and the first contact YPR1 and the second contact YPR2 of the relay YPR. And a selection circuit 32 for selecting one of them and sending it to the modulation circuit 21.

  The first ROM of the message storage unit 33 holds a G message including information on the G present and a Y message including information on the Y present, and the second ROM stores the Y message described above. An R telegram including information on the R indication is held, and the above-described R telegram and G telegram are held in the third ROM. In the case of the G display, the G message in the first ROM is read as the transmission message Ma, and the G message in the third ROM is read as the non-transmission message Mc. To be compared. In the case of Y indication, the Y message in the second ROM is read as the transmission message Ma, the Y message in the first ROM is read as the non-transmission message Mc, and both the messages Ma and Mc are checked by the matching circuit 35. To be compared. Further, in the case of the R indication, the R message in the third ROM is read as the transmission message Ma, the R message in the second ROM is read as the non-transmission message Mc, and both the messages Ma and Mc are read by the matching circuit 35. To be compared.

In such an ATS-P (N) ground unit 30 with a telegram checking function, multiple telegrams having the same contents are generated from a plurality of telegram ROMs, and one is used as a transmission telegram Ma to be transmitted. On the other hand, the non-transmission message Mc that is not the object of transmission is used, and the transmission message Ma and the non-transmission message Mc are collated, so that the failure of the own device, particularly the failure of the message storage unit 33, can be obtained. It can be detected.
Therefore, since a function for detecting a failure of the own apparatus can be realized without using a costly fail-safe computer, safety can be secured simply and inexpensively.

  Here (see FIG. 13), the signal display relays GR and YR output from the instrument box 14 are in the middle position (attention state / slow down instruction) from the R display at the lowest position (danger state / stop instruction). The case of changing from the Y display to the G display of the highest level (safety state / progress indication) will be described with reference to the signal waveform. In this case, ideally (see FIG. 13 (a)), both the relay G of the G display and the relay YR of the Y display start from the fall state, and only the display relay YR enters the operating state. It is desirable that the display relay YR be in a fall state simultaneously with the display relay GR being in an operating state. However, since there are uncertainties and variations that cannot be ignored in the switching timing of the relay (see the broken line portion in FIG. 13B), when the drop of the display relay YR is accelerated and the operation of the display relay GR is delayed (See FIG. 13C.) However, an undesired instantaneous R message (an R message corresponding message) is selected.

  Therefore (see FIG. 13 (d)), in order to avoid such inconvenience, the lower Y display relay YR of the actual traffic signal display relays GR, YR is, for example, a drop element. By adopting a slow release relay with a YR relay dropping extension function, etc., the falling timing of the present relay YR is delayed by several hundred ms. For this reason, there is a time when both the display relays GR and YR are in an operating state for an instant of about several hundred ms at the time of the state transition from the Y display to the G display. When the telegram 30 reads out the message when the YR operation is duplicated, the G message and the Y message are simultaneously read from the message storage unit 33, and these two messages are logically ORed for each bit. It becomes a transmission message Ma. However, such a transmission message Ma is not valid, and is an invalid X message that is known to be an error in a known and common redundant code check, specifically a CRC test (in FIG. 13 (d), it is marked with a star. Will be ignored without being accepted by the on-board device. For this reason, sufficient safety is ensured even if the relays GPR and YPR continue to be in an operating state due to, for example, cable contact, as well as temporary operation of the display relays GR and YR. For example, refer nonpatent literature 4).

JP 2006-338094 A JP-A-8-2414 (Patent No. 3345179) JP 2001-199335 A Japanese Patent Application No. 2011-008299

Overview of Signals for Railway Electrical Engineers “ATS / ATC”, pages 51-73 Japan Railway Electrical Engineering Association June 28, 2005 Revised 2nd edition issued Masakazu Miyaji “Safety Technology of ATS-P System Using Transponder” Railway Research Institute Report, Vol.2, No.1, P.11-17 (1988) Overview of Signals for Railway Electrical Engineers “ATS / ATC”, pages 73-74 Japan Railway Electrical Engineering Association June 28, 2005 Revised 2nd edition issued Masakazu Miyaji “Safety of ATS-Ps when mixed with cables” on pages 4-390 to 4-391

As described above, in the conventional ATS-P system, in the case of the ATS-P system with a repeater failure detection function (see the conventional example 1), the repeater having the modulation circuit and the ground unit having the transmission coil are combined. Since the diagnosis is performed by the code processor, the reliability is high. However, since a fail-safe computer is used for the code processor, the equipment cost increases.
On the other hand, in the case of a system using an ATS-P (N) ground unit with a telegram checking function (refer to the above-mentioned conventional example 2), a code processor and a repeater are unnecessary and high in economics, and a fault detection of a telegram storage unit Safety is also high.

However, the conventional ATS-P (N) ground unit with a telegram checking function does not detect a failure even for a transmission unit such as a modulation circuit or a transmission coil. For this reason, if the failure detection function of a transmission part is added, it is anticipated that safety | security will improve further.
And in the realization, the failure detection method by the code processor of the ATS-P ground device with the repeater failure detection function is taken in, and either of the failure detection result or the failure detection result of the existing message storage unit is selected. If one of them is a failure, the final detection result is also considered as a failure, and the two failure detection results are integrated into one.

  Specifically, a message selection unit that generates a transmission message Ma to be sent to the modulation circuit 21 and the transmission coil 22, a demodulation unit that generates a reception message Mb from a reception signal of the reception coil 23, and both messages Ma and Mb Multiple message selection means for taking over the first verification means to be compared from the ATS-P ground device with a repeater failure detection function and generating a non-transmission message Mc that is not a transmission target in addition to a transmission message Ma to be transmitted An integrated means for bringing together the results of the first and second collating means after taking over the second collating means for comparing the two messages Ma and Mc from the ATS-P (N) ground unit with the telegram checking function. The addition is considered a straightforward and simple solution.

However, with such a straightforward configuration, although it can be realized relatively inexpensively without using a fail-safe computer, it is still cumbersome and further devised. As a result, not only the message storage unit but also the transmission unit Further, an ATS-P ground unit with a failure detection function capable of detecting a failure up to the selection means has been devised.
This includes (see Patent Document 4) a transmission means for transmitting a transmission telegram including information for train stop control on a track by radio waves, a reception means for receiving the radio waves and generating a reception telegram, and the transmission A credit message and a non-transmission message of the same content are held in different storage areas of the message storage unit, and the transmission message is read from the message storage unit and sent to the transmitting means. A telegram selection unit that also performs reading, and a collation unit that compares the received telegram and the non-transmission telegram when they match and determines normal if they do not match, and verifies abnormal.

  Moreover, in the ATS-P ground unit with a failure detection function, the message storage unit holds a plurality of sets of the transmission message and the non-transmission message, and the plurality of sets of messages are included in the group. The information is different depending on the type of indication of the traffic signal between the pairs, but the information corresponding to the current indication of the traffic signal is selected from the plurality of sets of messages. The selection means to be read target is incorporated in or added to the message selection means, and the message storage unit also holds a set of collation establishment prevention messages having different contents in the set, When the selection means makes a reading object that does not correspond to the type of indication of the traffic signal, instead of the pair of the transmission message and the non-transmission message from the message storage unit, the collation establishment prevention message Pairs are now read There.

  And in such an ATS-P ground unit with a failure detection function, since the collation target is a received message and a non-transmission message, collation means and integration means are reduced from the above-mentioned direct configuration, and the It has become a thing. Nevertheless, not only when the content of the telegram storage unit has failed and the content of the transmission message or non-transmission message has been impaired, but the content of the transmission message or even the reception message has been impaired due to a failure in the transmission means or reception means. Even when the received message and the non-transmitted message do not match, any inconvenience is detected.

  Similarly to the conventional example 2 described above, a plurality of sets of transmission messages and non-transmission messages are made corresponding to the fact that there are a plurality of information source signal indications, and a selection means is provided. However, not only that, but also a set of collation establishment prevention messages whose contents differ between the groups is held in the message storage unit, and the selection means has a problem and does not correspond to the type of indication of the traffic light Is read, the set of collation establishment prevention messages is read, and processing related to the transmission message and non-transmission message is performed on it. Since the credit message also does not match and a result of collation with an abnormality is output, even the failure of the selection means is detected.

  However, even if the fault detection capability is improved by such an improvement, when the signal display is improved from the Y display to the G display, both the signal display relays GR and YR are caused by the YR relay falling extension. It has not been prevented until the ground unit transmits an invalid telegram (see the X telegram marked with a star in FIG. 13D) when it is in the operating state. As described above, such invalid telegrams are ignored by the on-board device and do not impair safety, but the ground unit and the on-board unit are combined at the time of a high-order change from the Y display to the G display. Even if the train is moving up to the place, if the transmission of the traffic signal display information is delayed even in a short time, the upper update of the speed check pattern P in the on-board device is also delayed by that amount. In rare cases, the speed of the speed check pattern P exceeds the speed of the own train V, and the brake may be activated.

  More specifically (see FIG. 14), when the traffic light 13 is in the R display (see FIG. 14 (a)), the speed check pattern P of the on-board device is a regulation P (R) that can ensure a reliable stop. Yes, the driver who visually confirms the R indication lowers the train speed V and stops the train 12. Then, when the traffic light 13 changes to the Y indication (see FIG. 14 (b), the traffic light 13a is a signal traffic ahead of the traffic light 13), the driver who visually confirms the Y indication is the train speed V. It is desirable that the speed check pattern P is updated at the same time to P (Y) corresponding to Y indication that imposes attention progress, but the ground child 30 is still in progress. When the train does not travel to the place where the train 12 of the train 12 is coupled, the speed check pattern P remains P (R) corresponding to the R indication, and the speed check pattern P is as long as the train speed V is small. The train 12 proceeds toward the traffic light 13 while accelerating without being restricted by the above.

  And (see FIG. 14 (c)), when the train travels to the place where the ground element 30 and the upper element of the train 12 are coupled, it happens that the traffic light 13 changes from the Y display to the G display. When the YR relay falling extension period is entered, the message transmitted from the ground unit 30 to the vehicle unit becomes an invalid X message, so the speed check pattern P is not updated at all and is compatible with the R indication. It remains P (R). On the other hand, since the driver who visually confirms the G indication performs an operation to quickly increase the train speed V, the train speed V is regulated by the speed verification pattern P (R) corresponding to the R indication, and the train 12 There is a case where an automatic brake is applied (see FIG. 14 (d), where the traffic light 13b is a traffic light two ahead of the traffic light 13). In this case, the driver feels a sense of incongruity because the regulations against the G display visually confirmed are applied.

  In the four indications and five indications that have more indications than the above three indications, the relay drop extension similar to the YR relay drop extension described above is higher than the lowest R indication that is not assigned to the indicated relay. When changing from a relatively lower display to a relatively higher display, except for a change to the display, this is applied to the lower relay signal. And when the traffic signal display goes up from the lower level to the higher level, the ground unit and the vehicle upper unit are not yet combined, and when the traffic signal display goes up further, the ground unit and the vehicle upper unit are combined. Then, when the start timing of the coupling enters the period of relay drop extension, acceleration is performed without updating the speed check pattern, and the driver feels an unexpected sense of incongruity only when the speed check pattern is regulated. However, there is a sense of incongruity because the indication of the traffic signal has risen two or more levels from the lower level to the higher level. Therefore, when the operation status overlaps for multiple indication relays, even if one of the indications is preferentially adopted, a valid message that does not become invalid is transmitted, and the speed verification pattern is quickly set. It is possible to update it.

For example, as a configuration in which a means for selecting a reading target from the message storage unit is logically operated by a relay circuit, a G message corresponding to the G indication is selected when the indication relays GR and YR are both in an operating state. By doing so, it is possible to easily avoid the situation where the transmission message from the ground unit is discarded on the vehicle when multiple indications GR and YR are simultaneously activated in the transition state / transition state of the signal indication. (For example, see Patent Document 2, paragraph 0020 and FIG. 2).
However, since this method narrows down the target before reading the message, the number of cases in the relay state related to the signal display is reduced, so the failure mode is roughly separated, and the cables are mixed and around the message storage unit. Therefore, it is difficult to employ the ATS-P ground unit with a failure detection function because it is likely to cause an undesired decrease in detection capability for failures including the failure of the selection means.

  Therefore, on the premise of the above-described ATS-P ground unit with a failure detection function (see Patent Document 4) that can detect not only a message storage unit but also a transmission unit and a selection unit, a simple configuration can be easily performed without losing the simple configuration. It is a technical problem to improve the ground unit so that the on-board device can update the speed check pattern even when the operation of a typical display relay is duplicated.

  The ATS-P ground unit with a failure detection function of the present invention (Solution 1) was created to solve such a problem, and a transmission telegram including information for train stop control is on the track. Transmitting means for transmitting to a radio wave, receiving means for receiving the radio wave and generating a received message, and the transmission message and a non-transmission message having the same content as the same are stored in different storage areas of the message storage unit. The message selection unit that reads the transmission message from the message storage unit and sends it to the transmission unit and also reads the non-transmission message at that time, and compares the read received message and the non-transmission message The ATS-P ground unit with a failure detection function provided with a collating means that makes normal if they match and makes an abnormality if they do not match, wherein the message storage unit stores the transmission message and the non-transmission message. Hold multiple pairs The multiple sets of telegrams have the same contents within the set, but the sets of normal messages that differ in information corresponding to the type of display of the traffic signal between the sets, and temporary indications A set of a normal message containing information corresponding to a lower-level indication among a plurality of indications included in the operation duplication of the relay, and a collation establishment prevention message having a different content from that is included, A selection means for making the one corresponding to the current indication of the traffic light a reading target of the message selection means from among the plurality of sets of messages is incorporated or added to the message selection means. And

  The ATS-P ground unit with a failure detection function according to the present invention is (Solution means 2), which is the ATS-P ground unit with the failure detection function of the above solution means 1, and the contents differ between the groups and any telegram. The message storage unit also holds a pair of collation establishment prevention messages that do not correspond to the indication of the traffic signal, and when the selection means makes a reading object that does not correspond to the type of indication of the traffic signal, A set of the collation establishment prevention messages is read from the message storage unit.

  Furthermore, the ATS-P ground unit with a failure detection function according to the present invention is (the solution means 3), which is the ATS-P ground unit with the failure detection function of the above solution means 1 and 2, and is the same held in the storage area. The transmission message and the non-transmission message in the set are not completely the same at the bit level, but become completely the same when each bit is inverted, and the received message that the collating means is trying to compare The message comparison is performed after bit-inversion of either one of the message and the non-transmission message.

  In such an ATS-P ground unit with a fault detection function of the present invention (solutions 1 to 3), the ATS-P ground unit with a fault detection function as described in the column of the solution problem is improved, When the operation of the temporary indication relay is duplicated, a valid normal message received by the on-board device is sent from the ground unit to the on-board unit, not the invalid message ignored by the on-board unit. Updates are made quickly without delay. In addition, the improvement is realized by modifying the content held in the message storage unit, and is therefore free from complication of configuration and increase in circuit scale.

In addition, even if the transmission message transmitted when the operation of the temporary indication relay is duplicated is a normal message, the non-transmission message compared with the verification means is a verification establishment prevention message and the two do not match. The detection capability is not reduced. This is because such a mismatch caused by the temporary overlapping operation of the presenting relay and a continuous mismatch caused by cable contact are easily separated by the length of the mismatch. For example, the failure state and the transient state / transition state other than that can be easily separated by the aid of the drop extending method in the slow release relay described above.
Therefore, according to the present invention, not only the message storage unit but also the transmission unit and the selection means can be temporarily and easily performed without losing the simple structure that is a feature of the ATS-P ground unit with a failure detection function on the premise that the failure can be detected. Thus, it is possible to realize an ATS-P ground unit with a fault detection function that can update the speed check pattern at a higher level even when the operation of a typical display relay is duplicated.

Example 1 of the present invention shows the structure of an ATS-P ground unit with a fault detection function of three display information switching type, (a) is a schematic block diagram of ground equipment, (b) is an ATS- with fault detection function A block diagram of the P ground unit, (c) is a telegram frame configuration diagram. It is a detailed block diagram of a collation circuit and an output circuit. It is a detailed block diagram of a message | telegram selection means. It is the discrimination | determination table | surface of a selection circuit, and the allocation table | surface of the storage area of a message | telegram memory | storage part. Both (a) and (b) are signal waveform time charts, where (a) shows an example of operation during normal operation, and (b) shows an example of operation at the time of incompatibility failure. (A)-(d) are all the schematic diagrams of a train running state, and have shown the train running state at the normal time in time series. 7 is a determination table of a selection circuit and an allocation table of a storage area of a telegram storage unit in an ATS-P ground unit with a fault detection function of a three-display information switching type according to a second embodiment of the present invention. 9 is a determination table of a selection circuit and an allocation table of storage areas of a telegram storage unit in a four-display information switching type ATS-P ground unit with a failure detection function according to Example 3 of the present invention. It is the discrimination | determination table | surface of the selection circuit and the allocation table | surface of the memory | storage area | region of a message | telegram memory | storage part in Example 4 of this invention in the ATS-P ground unit with a fault detection function of a four display information switching type. It is the discrimination | determination table | surface of the selection circuit and the allocation table | surface of the memory | storage area | region of a message | telegram memory | storage part about Example 5 of this invention in the ATS-P ground unit with a fault detection function of five display information switching type | molds. The structure of a conventional ATS-P system with a repeater failure detection function is shown, (a) is a schematic block diagram of ground equipment, (b) is a block diagram of ATS-P ground equipment, and (c) is a telegram frame configuration diagram. is there. The structure of a conventional ATS-P (N) ground unit with a telegram checking function is shown, (a) is a schematic block diagram of ground equipment, (b) is a block diagram of ATS-P (N) ground unit, (c) is It is a message | telegram frame block diagram. (A)-(d) are all signal waveform time charts. (A)-(d) are all the schematic diagrams of a train running state, and have shown the train running state which a subject produces in time series.

With respect to the ATS-P ground unit with a failure detection function of the present invention, a specific form for carrying out this will be described by Examples 1 to 5 below.
The embodiment 1 shown in FIGS. 1 to 6 embodies all the above-described solving means 1 and 2 (claims 1 and 2 at the beginning of the application), and the embodiment 2 shown in FIG. The solution 1 (claim 1 as originally filed) is embodied, and the third embodiment shown in FIG. 8, the fourth embodiment shown in FIG. 9, and the fifth embodiment shown in FIG. The above solution 1 or 2 (claims 1 and 2 at the beginning of the application) is embodied, and the above solution 3 (the claim 3 at the beginning of the application) is specifically described in the “Others” column. .
In the illustration, for the sake of simplicity, the mechanical structure, the details of the electric circuit, the details of the electronic circuit, etc. are omitted from the illustration, and the blocks mainly necessary for the explanation of the invention and related ones are shown. Shown in the figure.

  A specific configuration of the ATS-P ground unit with a failure detection function according to the first embodiment (three display G, Y, R information switching type) of the present invention will be described with reference to the drawings. FIG. 1A is a schematic block diagram of a ground facility in which a plurality of ATS-P ground elements 40, 40a and 40b with a failure detection function are installed, and FIG. 1B is a block diagram of one of the ground elements 40, It is a block diagram of the message | telegram frame to which (c) is transmitted. 2 is a detailed block diagram of the collation circuit 45 and the output circuit 46, FIG. 3 is a detailed block diagram of the message selection means 41, and FIG. 4 is a determination table of the selection circuit 42 and a message storage unit 43. This is an allocation table of storage areas.

  The ATS-P ground unit 40 with a failure detection function (see FIG. 1 (a)) is based on the ATS-P (N) ground unit 30 with a telegram checking function of the conventional example 2 which is easy to use. The fault detection function is improved to the same level as that of the ATS-P ground device with one repeater fault detection function, and the three display information switching type is the same as the ground unit 30. Installed on the same trajectory 11 as the information providing target traffic signal 13 for providing information such as the distance to the traffic signal 13 and the current signal display to the on-board device or appropriately separated from other ground elements 40a, 40b, etc. The signal indicator relays GR and YR are inputted from the instrument box 14 of the signal device 13 and a telegram including appropriate information corresponding to the indication is transmitted onto the orbit 11 by a radio wave of 1.7 MHz. Unlike child 30, instrument 14 is a power source grounding element that is always operated by receiving DC power DC135V. Therefore, it is not necessary to receive 245 kHz radio waves from the on-board device of the train 12, and further, whether the result is normal or abnormal. The detection result is always output to the instrument box 14 as the operation / falling state of the relay NRM1 (NRM2 and NRM3 for the ground elements 40a and 40b).

  When the internal structure is described (see FIG. 1B), the ground unit 40 is a modulation circuit as transmission means 21 and 22 for transmitting a transmission telegram Ma including information for train stop control onto the track 11 by radio waves. 21 and the transmitting coil 22, and the receiving coil 23 and the demodulating circuit 24 as receiving means 23 and 24 for receiving the radio wave and generating the received telegram Mb, the above-described ATS-P ground device with a repeater failure detecting function. Has taken over. In addition, the ATS-P (N) ground unit 30 with the telegram checking function described above follows the basic configuration of the telegram selection means 31 and the matching circuit 35. The ground unit 40 is modified for simplification of configuration, and includes a telegram selection unit 41, a collation circuit 45, and an output circuit 46 which have the configuration described in detail below. A power supply circuit 47 is also provided for power supply.

  The message selection means 41 (see FIG. 1 (b)) comprises a relay circuit and receives the contact outputs of the indication relays GR and YR of the traffic light 13 by the relay relays GPR and YPR and corresponds to the indications G, Y and R. A selection circuit 42 for selecting a transmission message Ma, a message storage unit 43 made of, for example, an EEPROM and holding a transmission message Ma and a non-transmission message Mc having the same contents as different storage areas, and a counter-oriented circuit, for example And a reading circuit 44 that generates a read address of the message storage unit 43 by incrementing the count value in accordance with the modulation timing of the transmission message Ma, and the like. Ma is read and sent to the modulation circuit 21 of the transmission means 21 and 22, and the non-transmission message Mc having the same content is read in parallel with the reading of the transmission message Ma. It is adapted to be carried out. Note that if the reading of both messages Ma and Mc from the message storage unit 43 is in bit units, the timing is adjusted by a latch or the like (see FIG. 3), but if it is a plurality of units such as bytes or words, it is paralleled by a shift register or the like. -Serial conversion is also performed.

  In the selection circuit 42 (see the left half of FIG. 4), the first contact GPR1 of the relay GPR, the second contact GPR2 of the relay GPR, the first contact YPR1 of the relay YPR, and the second contact YPR2 of the relay YPR are in an operating state, respectively. Depending on whether it is (↑) or falling (↓), one bit of “1” or “0” is made to correspond to each contact, and a partial address for one digit is generated in hexadecimal. ing. Specifically, when the traffic signal 13 is in the G display, if each of the contacts GPR1, GPR2, YPR1, and YPR2 is normal, the contact state becomes ↑↑ ↓↓, and thus the partial address “C” is generated. Further, when the traffic light 13 is in the Y state, if each of the contacts GPR1, GPR2, YPR1, and YPR2 is normal, the contact state becomes ↓↓ ↑↑, so the partial address “3” is generated.

  Further, when the traffic signal 13 is in the R display, if each of the contacts GPR1, GPR2, YPR1, and YPR2 is normal, the contact state is ↓↓↓↓, so the partial address “0” is generated. In addition, when a continuous failure occurs, such as when the operation of the temporary display relays GR and YR due to the YR relay dropping and extension described above and when the transmission lines of both relay signals are mixed, If GPR1, GPR2, YPR1, and YPR2 are normal, the contact state becomes ↑↑↑↑, and therefore, a partial address “F” is generated (see the portion marked with an asterisk in the figure). The other contact state is considered as a continuous abnormal state that appears when a contact failure or other failure occurs, so that another value is generated as a partial address.

  The message storage unit 43 (see the right half of FIG. 4) corresponds to such partial address generation of the selection circuit 42, and the storage areas “0C0” to “0CF” and the storage area “1C0” in hexadecimal address display. G-messages, which are normal messages corresponding to G-displays, are held in each of “1” to “1CF”, and Y-displays are stored in the storage areas “030” to “03F” and the storage areas “130” to “13F”, respectively. A Y message that is a corresponding normal message is held, and an R message that is a normal message corresponding to the R display is held in each of the storage areas “000” to “00F” and the storage areas “100” to “10F”. Yes. The storage areas “0F0” to “0FF” hold Y messages that are normal messages corresponding to the lower Y display of the G display and Y display, but the storage area “1F0”. ~ "1FF" holds the collation establishment prevention message "0... 0" (refer to the places marked with * in the figure).

Further, the message storage unit 43 holds the verification establishment prevention message “1... 1” at the address “0 **” and the address “1 **” for the storage area of other addresses. Holds a collation establishment prevention message “0... 0”.
The G telegram, Y telegram, and R telegram are valid telegrams that are transmitted on the track 11 and accepted when the on-board device normally receives them, and are used for train stop control. The collation establishment prevention telegram “1... 1” is The invalid message that is transmitted on the track 11 and received by the on-board device is not accepted due to a CRC error, and the collation establishment prevention message “0... 0” is not only inconsistent with the Y message and other normal messages. This is a non-matching message that does not match the message “1.

Further, in the message selection means 41, the reading circuit 44 generates the upper one digit and the lower one digit of the hexadecimal three-digit address for the above-mentioned message storage unit 43, and at the middle one digit of the selection circuit 42 By inserting the generated partial address, the transmission message Ma is read from one storage area, for example, “000” to “0FF”, and non-transmission is performed from the other storage area, for example, “100” to “1FF”. Since the message Mc is read, the message storage unit 43 holds a plurality of sets of the transmission message Ma and the non-transmission message Mc.
In addition, among a plurality of sets of the transmission message Ma and the non-transmission message Mc, the combination of normal messages that can be continuously read when the ground element 40 is normal has the same content within the group. However, the information differs depending on the type of display of the traffic lights 13, that is, the G display, the Y display, or the R display, between the groups.

  Further, among the plurality of sets of the transmission message Ma and the non-transmission message Mc, the message set that can be temporarily read when the ground unit 40 is normal, and is continuous when a failure such as incompatibility occurs. As for the combination of a normal message that can be read and a collation establishment prevention message (see the part marked with a star in the figure), the normal message is included in the temporary duplication of operation of the indication relays GR and YR A Y message containing information corresponding to a relatively lower Y indication among a plurality of indications G and Y, and the collation establishment prevention message is a mismatch message with a different content from the Y message. It has become. In addition, the selection circuit 42 selects the one corresponding to the current display of the traffic light 13 from the plurality of sets of messages of the transmission message Ma and the non-transmission message Mc as a reading target of the message selection means 41. ing. In the ground unit 40, the selection circuit 42 is incorporated in the message selection unit 41. However, the selection circuit 42 may be added to the preceding or subsequent stage of the message selection unit 41.

  Further, the message storage unit 43 is a combination of a transmission message Ma and a non-transmission message Mc that can be read out normally or temporarily, among the storage areas that can be read out. Aside from the storage area that holds, the other storage areas have different values for each pair by having an inverted value for each bit. “1... 1”, “0... 0” are stored and held. Further, when the selection circuit 42 selects a message that does not correspond to the type of display of the traffic light 13 as a reading target of the message selection means 41, the set “1... 1” of the above-mentioned matching establishment prevention messages from the message storage unit 43. , “0... 0” are read out. Then, the verification establishment prevention message “1... 1” of all bits “1” is sent to the modulation circuit 21 in the same manner as the transmission message Ma, and the verification establishment prevention message “0... 0” of all bits “0” is As with the non-transmission message Mc, it is sent to the verification circuit 45.

  The collation circuit 45 (see FIG. 2) receives the received message Mb from the demodulator circuit 24 and also receives the non-transmission message Mc from the message storage unit 43, and sets the timing of both messages Mb and Mc at a bit level with an appropriate synchronization circuit or the like. The two messages Mb and Mc are compared with each other, and if they match, the collation result is normal, and if they do not match, the collation result is abnormal. Moreover, the collating circuit 45 is mainly composed of the fail-safe comparison circuit (FS comparison circuit) having the above-mentioned known and proven pendulum circuit, and the comparison results in the comparison circuit match. While the signal continues, an alternating signal whose value alternately changes at a constant period is output. However, when a mismatch is detected in the comparison result, a constant signal whose value does not change is output.

  The output circuit 46 (see FIG. 2) also comprises a known and proven fail-safe relay driver, which converts the collation result of the collation circuit 45 from an alternating signal into a DC signal relay drive signal B to drive the relay NRM1. It is like that. In addition, in order to avoid the inconvenience that the relay NRM1 is sensitive to when the relay drive signal B output from the output circuit 46 temporarily falls (0) due to a short-time mismatch in the verification circuit 45. The relay charging / discharging circuit 14a for dropping and extending the relay is connected in parallel to the electromagnetic coil of the relay NRM1, so that the relay NRM1 is a slow release relay that separates the failure state from the transient state / transition state (FIG. 1B). , See FIG. The time constant of the charging / discharging circuit 14a is set so as to relax the sensitivity of the relay NRM1 to, for example, about several hundred ms, and at least the temporary indication relay caused by the YR relay falling extension described above. The relay NRM1 is not sensitive to a temporary drop of the relay drive signal B due to an overlapping operation. Such state separation may be performed by the output circuit 46, but in this example, the state separation function is simply realized by a conventional slow release relay.

  The power supply circuit 47 (see FIG. 1 (b)) is supplied with DC power DC135V from the instrument box 14 so as to constantly generate operating power for the respective parts 21-24 and 41-46. For example, DC 5V DC power is continuously supplied to the message selection means 41 and the collation circuit 45, DC 48V DC power is continuously supplied to the transistors of the output circuit 46, and the final stage of the output circuit 46 is DC 24V. DC power can be continuously supplied.

  Note that (see FIG. 1 (c)), the frame structure of the transmission message Ma including information on the G indication, Y indication, or R indication is basically the same HDLC format as the above-described conventional example. For example, an abort code (ABT) of “11111111” is added in binary so that the received message Mb and the non-transmission message Mc can be synchronized easily and reliably. In addition, as described above, the collation establishment prevention message “1... 1” that may be transmitted on the track 11 via the transmission means 21 and 22 instead of the transmission message Ma is, for example, the vehicle of the train 12. The cyclic redundancy check code CRC is an invalid invalid message so that it is not undesirably received even if it is received by the upper device.

  The use mode and operation of the ATS-P ground unit 40 with the failure detection function of the first embodiment will be described with reference to the drawings. In FIG. 1, (a) is an installation status diagram of a plurality of ATS-P ground elements 40, 40a, and 40b with a failure detection function, (b) is a block diagram of the ground element 40, and (c) can be a transmission message Ma. It is a frame configuration diagram of a G message, a Y message, an R message, and an invalid message “1... 1”. FIG. 3 is a detailed block diagram of the message selection unit 41, and FIG. 4 is a determination table of the selection circuit 42 and a storage area allocation table of the message storage unit 43.

Further, FIG. 5 is a signal waveform time chart for both (a) and (b), and FIG. 6 is a schematic diagram of the train running state for both (a) to (d). 5A and 6 show an example of the operation of the ground unit 40 at normal times and the running state of the train 12, and FIG. 5B shows an example of the operation of the ground unit 40 at the time of incompatibility failure. Show.
The ground unit 40 is installed appropriately separated from other ground units 40a and 40b having the same configuration along the same track 11 as the signal device 13 to be provided with information (see FIG. 1A). It is connected with a cable and always operates by receiving DC power of 135 V DC from the instrument box 14.

  When necessary, the signal of the traffic signal display relays GR and YR is sent from the device box 14 to the ground unit 40 via the cable. If there is no abnormality in the ground unit 40, the operation / falling state of the display relays GR and YR is determined. Then, a transmission telegram Ma (see FIG. 1C) including appropriate information corresponding to the indication of the traffic light 13 is generated by the ground unit 40 (see FIG. 1B), and the telegram is further on the orbit 11. Is transmitted by a 1.7 MHz radio wave (see FIG. 1A). Therefore, when the train 12 traveling on the track 11 approaches the ground unit 40 and the on-board device of the train 12 receives the radio wave, information such as the distance from the received telegram to the traffic light 13 and the current signal 13 is displayed on the vehicle. An appropriate speed check pattern P is generated by the on-board device depending on whether the signal indication is the G indication, the Y indication, or the R indication. Stop control is performed.

  First, the generation and transmission of the transmission message Ma in the ground unit 40 will be described in detail (see FIGS. 1B and 3). The signal of the traffic signal display relay GR input to the message selection means 41 is selected by the selection circuit 42. The first contact GPR1 and the second contact GPR2 of the relay GPR are converted to a 2-bit partial address and incorporated in the addressing of the telegram storage unit 43, and the signal of the signal display relay YR is the first of the relay YPR of the selection circuit 42. It is also made a 2-bit partial address at the first contact YPR1 and the second contact YPR2 and incorporated into the addressing of the message storage unit 43, and the remaining bit portion of the addressing of the message storage unit 43 is supplemented by the reading circuit 44. Thus, a reading target is selected from the storage area of the message storage unit 43. Then, the transmission message Ma is read from one of “000” to “0FF” in different storage areas, and the non-transmission message Mc is read from the other “100” to “1FF” (see FIG. 4).

  At this time, if the traffic light 13 is G display and the selection circuit 42 correctly responds to the signal, the transmission message Ma and the non-transmission message Mc are read from different storage areas of the message storage unit 43, and both The contents of the messages Ma and Mc are the same G message (normal message). In the case of Y display and R display, the same Y message and the same R message are also obtained. In addition, when the operations of the display relays GR and YR are temporarily overlapped due to the YR relay drop extension (see the portion marked with * in the figure), the content of the transmission message Ma is a lower level normal message. On the other hand, the content of the non-transmission message Mc that forms a pair with the Y message is the non-matching message collation establishment prevention message “0... 0”. Further, when there is a continuous failure such as a contact failure in the relays GPR and YPR, the content of the transmission message Ma becomes the invalid message verification establishment prevention message “1... 1”, and the message is a bit. The non-transmission message Mc is a non-transmission message Mc for the verification establishment prevention message “0. In any case (see FIGS. 1A and 1B), the transmission message Ma is transmitted to the train 12 on the track 11 by the transmission units 21 and 22, and at the same time, the reception unit 23 and 24 receives the reception message. Mb.

  Thus, when the non-transmission message Mc is generated along with the generation of the transmission message Ma and the reception message Mb is generated according to the transmission of the transmission message Ma, both the messages Mb and Mc are (see FIG. 2). The collation circuit 45 synchronizes bit by bit and compares each corresponding bit. If all match, the collation result is normal. If there is no match, the collation result is abnormal. . The collation result is converted into a relay drive signal B by the output circuit 46 and then sent to the instrument box 14 via a cable. Since the ground unit 40 always receives DC 135V DC power supplied from the device box 14 connected to the cable by the power supply circuit 47, the transmission telegram Ma is also transmitted to the reception telegram Mb and the non-transmission telegram Mc. Fault detection by collation and output of the collation result are performed at any time, so that fault detection and external notification can be performed when a fault occurs, so that backup measures for safety and ground replacement can be quickly performed.

  The point of switching the message to be transmitted by the operation / falling of the relays GPR and YPR corresponding to the indication of the traffic light 13 follows the function of the conventional P (N) ground element, but the candidate of the message for transmission Ma is Not only the G message, Y message, and R message but also the invalid message verification establishment prevention message “1... 1”, the non-transmission message Mc candidates with the same contents and the normal G message, Y message, and R This is expanded not only to the electronic message but also to the message “0. For this reason, when a failure of the relay contact occurs in the selection circuit 42, the pair “1... 1” and “0. Is done.

  Further, even if the selection circuit 42 is normal, when a message occurs in the message storage unit 43 and the message data is damaged, the message is read as a transmission message Ma or a non-transmission message Mc, but both the messages Ma and Mc Since the storage areas are different, the probability that both messages Ma and Mc are simultaneously damaged in the same mode is negligibly small compared to one-side damage or non-identical damage, so it is sufficient to consider a failure state in which both messages Ma and Mc do not match. Therefore, the received message Mb obtained by restoring the transmission message Ma from the received signal also does not match the non-transmission message Mc, and an abnormality collation result is obtained. Therefore, a failure is detected even for the malfunction of the message storage unit 43. The

  Even if the message selection means 41 are all normal, if a problem occurs in the transmission means 21, 22 or the reception means 23, 24, the contents of the message are lost in the process of obtaining the reception message Mb from the transmission message Ma. Since the received message Mb is not the same as the transmitted message Ma, and the received message Mb is not the same as the non-transmitted message Mc having the same content as the transmitted message Ma, the collation circuit 45 outputs an abnormal collation result. If there is a failure, the transmission means 21 and 22 and the reception means 23 and 24 are also detected.

In addition, a fail-safe comparison circuit is used for the comparison circuit 45, but the comparison circuit is commonly called a pendulum circuit and has a proven track record in bus data comparison circuits of electronic interlocking devices. Yes, it can be said that the probability of erroneously issuing an alternating signal due to its own circuit failure is zero (0).
Moreover, since a fail-safe relay driver is employed for the output circuit 46, the probability that the output circuit 46 erroneously outputs a predetermined voltage due to its own circuit failure can be said to be zero (0).
Therefore, it can be said that the entire ATS-P ground element 40 with the failure detection function is fail-safe.

  The operation of the ground unit 40 according to the traffic signal indication relays GR and YR has been described in detail above. Next, the traffic signal indication is changed from the R indication at the lowest level (dangerous state / stop instruction) to the middle. A description will be given of a case where the display changes to the G display at the highest position (safety state / advance instruction) through the Y display at the position (attention state / speeding instruction). When the ground unit 40, the instrument box 14, and the cable between the two are all normal (see FIG. 5A), the cable is in contact and either one of the display relay GR and the display relay YR. However, the case of a continuous failure (see FIG. 5B) in which both the relay relays GPR and YPR are in an operation state when the operation state is entered will be described in detail below.

  When the ground unit 40 and the like are normal, when the traffic light 13 is in the R display, the display relay GR and the relay relay GPR as well as the display relay YR and the relay relay GYR are in a fall state (see the left part of FIG. 5A). Since the transmission message Ma is the R message and the non-transmission message Mc is also the R message in the ground unit 40, the relay drive signal B becomes the operation state (1) and the relay NRM1 maintains the operation state and is normal. In the on-board device of the train 12, the speed check pattern P is P (R) that can ensure a reliable stop (see FIG. 6 (a)). The speed V is decreased and the train 12 is stopped.

  Then, when the traffic light 13 is changed to the Y indication (see FIG. 6B), the indication relay GR and the relay relay GPR maintain the fall state, but the indication relay YR and the relay relay GYR are in an operating state ( In the ground element 40, the contents of both the transmission message Ma and the non-transmission message Mc are switched, but since both are Y-messages, the relay drive signal B remains in the operating state and the relay NRM1 is turned on. Although the operation state is maintained and it is normal, the driver who visually confirms the Y indication in the train 12 starts to advance the train 12 toward the traffic light 13 by increasing the train speed V (FIG. 6B). (Note that the traffic light 13a is the traffic light ahead of the traffic light 13.) If the train 12 has not yet reached the place where the ground element 40 and the upper element of the train 12 are coupled, the speed check pattern P is Y indication correspondence (Y) is not updated at the upper level and remains P (R) corresponding to the R indication, but while the train speed V is low, the train 12 is accelerated by the traffic light 13 without being restricted by the speed check pattern P. And proceed.

  Then, when the train 12 travels and its upper element is coupled to the ground element 40, the speed check pattern P of the on-board device is upgraded to P (Y) corresponding to Y indication (see FIG. 6C). In addition, the traffic light 13b is a traffic light two ahead of the traffic light 13.) As already described in the solution section, when the train travels to the place where the ground element 40 and the upper element of the train 12 are coupled, it happens that the traffic light 13 changes from the Y display to the G display. Even when the YR relay fall extension period is entered (see the portion marked with an asterisk in FIG. 5A), the message Ma transmitted from the ground unit 40 to the vehicle upper unit is valid. Therefore, the speed check pattern P is upgraded from P (R) corresponding to R indication to P (Y) corresponding to Y indication (see FIG. 6C). Since the speed check pattern P is immediately updated in this way, even if the driver who visually confirms the G display performs an operation to quickly increase the train speed V, the train speed V immediately becomes the speed check pattern P ( R) is unlikely to be regulated.

  In addition, when the YR relay drops and extends, the ground relay 40 (see the part marked with an asterisk in FIG. 5 (a)), the current relay GR and the relay relay GPR as well as the current relay YR and the relay relay GYR are in the operating state. As described above, the content of the transmission message Ma becomes a normal Y message as described above, whereas the content of the non-transmission message Mc becomes a non-matching message collation establishment prevention message “0... 0”. Although the signal B falls for a short time of about several hundred ms, the relay NRM1 is a slow release relay that does not respond to it, so it keeps operating and shows that it is normal.

  Then, when the YR relay dropping and extending period passes in an instant (see the right part of FIG. 5 (a)), the present relay GR and the relay relay GPR maintain the operating state, whereas the present relay YR and the relay relay. The GYR falls and the contents of the transmission message Ma and the non-transmission message Mc are switched in the ground unit 40. However, since both are the G message, the relay drive signal B returns to the operation state and the relay NRM1 maintains the operation state. Indicates normal.

  On the other hand, in the case of a continuous failure in which both the relay relays GPR and YPR are put into operation when either the present relay GR or the present relay YR is in an operating state when the cable or the like is mixed. 5 (b)), when the traffic light 13 is R-present, the present relay GR and relay relay GPR as well as the present relay YR and relay relay GYR are in the fall state (see the left side of FIG. 5 (b)). ), Since the transmission message Ma is an R message and the non-transmission message Mc is also an R message in the ground unit 40, the relay drive signal B is in an operating state, indicating that the relay NRM1 maintains an operating state and is normal. Although the incompatibility failure is still latent in the present state, since the telegram transmitted from the ground element 40 onto the track 11 is the R telegram, the safety of the train operation is maintained.

  When the traffic light 13 changes from the R display to the Y display (see the portion near the center from the left side in FIG. 5B), the display relay YR operates while the display relay GR remains in the fall state. However, the relay relays GPR and YPR of the ground unit 40 are in an operating state up to the relay YPR as well as the relay GPR due to incompatibility. Then, in the ground unit 40, the contents of the transmission message Ma and the non-transmission message Mc are switched, and the content of the transmission message Ma becomes the Y message of the valid message, but the content of the non-transmission message Mc is prevented from being matched with the mismatch message. Since the telegram “0... 0”, the relay drive signal B falls. This fall state is not temporary as in the case of the relay drop extension, and is maintained while the Y indication is made and even when the G indication is made. Therefore, the fall state is mostly determined by the CR charge / discharge circuit 14a. Since the relay NRM1 is maintained longer than the element when the relay NRM1 is dropped and the relay NRM1 is dropped after the element when the relay NRM1 is dropped, the failure state becomes obvious.

A specific configuration of the ATS-P ground unit with a failure detection function according to the second embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a determination table of the selection circuit 42 and a storage area allocation table of the message storage unit 43.
This ATS-P ground unit with a failure detection function is different from that of the first embodiment described above in that there are two contacts adopted from the relay relays GPR and YPR with respect to the case classification relating to the selection circuit 42 and the message storage unit 43. The number of cases has decreased from one to one and the number has increased from 16 to 4.

  Specifically, in the selection circuit 42, the partial addresses “2”, “1”, “0”, “0”, according to the states ↑ ↓, ↓ ↑, ↓↓, ↑↑ that the display relays GR, YR can take. By generating 3 ″, it is divided into four cases of G display, Y display, R display, and duplication / failure. The first three of them are continuously normal cases, and the last one (refer to the place marked with * in the figure) is the temporary operation of the relays GR and YR, or inconsistency This is the case of failure. Corresponding to such partial address generation, in the message storage unit 43, a combination of a G message and a G message, a Y message and a Y message as set data of the transmission message Ma and the non-transmission message Mc , A pair of R message and R message, and a pair of Y message and mismatch message are stored and held. Of these, the first three are pairs of normal messages, and the last one (see the figure marked with an asterisk in the figure) is a set of normal messages and collation establishment prevention messages. The telegram corresponds to the Y display lower than the G display.

  In this case, the detectability for the failure of the relay of the selection circuit 42 is weakened as much as the number of contacts used from the relay relays GPR and YPR for each case is reduced. However, other fault detectability and operation are described above. This is the same as the ground unit 40 of the first embodiment.

  A specific configuration of the ATS-P ground unit with a failure detection function according to the third embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a determination table of the selection circuit 42 and a storage area allocation table of the message storage unit 43.

  This ATS-P ground element with a failure detection function is suitable for four indications (G, YG, Y, R), and in the selection circuit 42, possible states of the indication relays GR, YGR, YR ↑ ↓ ↓, ↓ ↑ ↓, ↓↓ ↑, ↓↓↓, ↑↑ ↓, ↑ ↓ ↑, ↓ ↑↑, ↑↑↑, partial addresses “4”, “2”, “1”, “0” , “6”, “5”, “3”, “7”, G display, YG display, Y display, R display, duplication / fault, duplication / fault, duplication / fault, The case is divided into eight cases of failure. The first four of them are continuously normal cases, and the three intermediate ones (see the places marked with an asterisk in the figure) are temporary overlaps of the indication relays GR, YGR, YR. It is a case of failure such as time or contact, and the last one is a case of failure.

  Corresponding to such partial address generation, the telegram storage unit 43 stores a pair of a G telegram and a G telegram, a YG telegram and a YG telegram, as pair data of the transmission telegram Ma and the non-transmission telegram Mc. Group, Y message and Y message group, R message and R message group, YG message and mismatch message, Y message and mismatch message, Y message and mismatch message, invalid message And a mismatched message are stored and held. The first four of them are pairs of normal messages, and the middle three (see the places marked with an asterisk in the figure) are pairs of normal messages and collation establishment prevention messages. The YG message corresponds to the YG display lower than the G display, and the Y message corresponds to the Y display lower than the G display and the YG display. The last one is a set of collation establishment prevention messages.

  A specific configuration of the ATS-P ground unit with a failure detection function according to the fourth embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a determination table of the selection circuit 42 and a storage area allocation table of the message storage unit 43.

  This ATS-P ground element with a failure detection function is adapted to the four indications (G, Y, YY, R), and in the selection circuit 42, possible states of the indication relays GR, YR, YYR ↑ ↓ ↓, ↓ ↑ ↓, ↓↓ ↑, ↓↓↓, ↑↑ ↓, ↑ ↓ ↑, ↓ ↑↑, ↑↑↑, partial addresses “4”, “2”, “1”, “0” , “6”, “5”, “3”, “7”, G display, Y display, YY display, R display, duplication / fault, duplication / fault, duplication / fault, The case is divided into eight cases of failure. The first four of them are continuously normal cases, and the next three intermediates (see the places marked with * in the figure) are temporary GR, YR, YYR operation overlaps or This is a case of failure such as incompatibility, and the last one is a failure.

  Corresponding to such partial address generation, in the message storage unit 43, a combination of a G message and a G message, a Y message and a Y message as set data of the transmission message Ma and the non-transmission message Mc Group, YY message and YY message group, R message and R message group, Y message and mismatch message group, YY message and mismatch message group, YY message and mismatch message, invalid message And a mismatched message are stored and held. The first four of them are pairs of normal messages, and the middle three (see the places marked with an asterisk in the figure) are pairs of normal messages and collation establishment prevention messages. The Y message corresponds to the Y indication lower than the G indication, and the YY message corresponds to the Y Y indication lower than the G indication and the Y indication. The last one is a set of collation establishment prevention messages.

  A specific configuration of the fifth embodiment of the ATS-P ground element with a failure detection function of the present invention will be described with reference to the drawings. FIG. 10 is a determination table of the selection circuit 42 and a storage area allocation table of the message storage unit 43.

  This ATS-P ground element with a failure detection function is suitable for the five current indications (G, YG, Y, YY, R), and the selection circuit 42 takes the current relays GR, YGR, YR, YYR. ↑ ↓↓↓, ↓ ↑ ↓↓, ↓↓ ↑ ↓, ↓↓↓ ↑, ↓↓↓↓, ↑↑ ↓↓, ↓ ↑↑ ↓, ↓↓ ↑↑, ↑ ↓ ↑ ↓, ↑ ↓↓ ↑, ↓ ↑ ↓ ↑, ↑↑↑ ↓, ↑↑ ↓ ↑, ↑ ↓ ↑↑, ↓ ↑↑↑, ↑↑↑↑ Depending on the partial address “8”, “4”, “2”, “ “1”, “0”, “C”, “6”, “3”, “A”, “9”, “5”, “E”, “D”, “B”, “7”, “F” , G display, YG display, Y display, YY display, R display, duplication / fault, duplication / fault, duplication / fault, duplication / fault, duplication / fault, duplication / fault, There are 16 cases of failure, failure, failure, failure and failure.The first five of them are continuously normal, and the next six intermediates (see the places marked with * in the figure) are temporary GR, YGR, YR, and YYR operation overlaps. Or the case of failure such as incompatibility, and the last five are cases of failure.

  Corresponding to such partial address generation, the telegram storage unit 43 stores a pair of a G telegram and a G telegram, a YG telegram and a YG telegram, as pair data of the transmission telegram Ma and the non-transmission telegram Mc. Group, Y message and Y message group, YY message and YY message group, R message and R message group, YG message and mismatch message, Y message and mismatch message, YY message And a mismatch message, a Y message and a mismatch message, a YY message and a mismatch message, a YY message and a mismatch message, an invalid message and a mismatch message, an invalid message and a mismatch message A pair, a pair of invalid message and mismatch message, a pair of invalid message and mismatch message, and a pair of invalid message and mismatch message are stored and held. The first five of them are pairs of normal messages, and the middle six (see the places marked with an asterisk in the figure) are pairs of normal messages and collation establishment prevention messages. The YG message corresponds to the YG indication lower than the G indication, the Y message corresponds to the Y indication lower than the G indication and the YG indication, and the YY message corresponds to the G indication and YG indication. The display corresponds to the YY display lower than the Y display. The last one is a set of collation establishment prevention messages.

[Others]
In the above embodiment, the transmission message Ma and the non-transmission message Mc in the same group held in the message storage units 43 and 53 are completely the same up to the bit level. The credit message Ma and the non-transmission message Mc may not be completely the same up to the bit level, and specifically, may be the same when each bit is inverted. In that case, a bit inversion circuit that inverts each bit of the received message Mb received from the demodulation circuit 24 is placed in front of the verification circuit 45 or each non-transmission message Mc read from the message storage unit 53 is changed. A bit inversion circuit that inverts the bit may be placed in advance or any modification may be performed.

  Moreover, in the said Example 3-5, although the contact point employ | adopted from each relay relay was one each regarding the case classification concerning the selection circuit 42 and the message | telegram memory | storage part 43, each relay was applied according to the said Example 1. Two contacts may be adopted from the relay. Furthermore, about the said Examples 1-5, you may make it use three or more contacts from each relay relay according to a case.

  The ATS-P ground unit with a failure detection function according to the present invention does not exclude receiving information such as a train number and a deceleration from a train, and a circuit for receiving such information may coexist.

11 ... Track (railway track), 12 ... Train (on-board equipment), 13 ... Traffic light,
14 ... Instrument box, 14a ... CR charge / discharge circuit (element when dropped, relay drop extension circuit)
21 ... modulation circuit (amplification circuit), 22 ... transmission coil (information wave antenna),
23: Reception coil (transmission confirmation antenna), 24 ... Demodulation circuit,
30, 30a, 30b ...
31 ... telegram selection means (multiplex), 32 ... selection circuit, 33 ... telegram storage unit (ROM),
34 ... Read circuit, 35 ... Collation circuit, 36 ... Fault processing circuit,
37 ... power supply circuit, 38 ... receiving coil (electromagnetic antenna for power acquisition),
40, 40a, 40b ...
41 ... telegram selection means (multiplex), 42 ... selection circuit, 43 ... telegram storage unit (ROM),
44 ... Reading circuit, 45 ... Verification circuit (FS comparison circuit),
46 ... Output circuit (FS relay driver), 47 ... Power supply circuit

Claims (3)

  A transmission means for transmitting a transmission telegram containing information for train stop control on a track by radio waves, a reception means for receiving the radio waves and generating a reception telegram, the transmission telegram and a non-transmission of the same content as the transmission telegram A telegram selection unit that holds a credit telegram in a different storage area of the telegram storage unit, reads out the transmission telegram from the telegram storage unit and sends it to the transmission unit, and at that time also reads out the non-transmission telegram, The ATS-P ground unit with a failure detection function, comprising: a collating unit that compares the received message with the non-transmitted message when the message matches and indicates normality when the message does not match, The storage unit holds a plurality of sets of the transmission message and the non-transmission message, and the plurality of sets of messages have the same content within the set but the type of the traffic signal between the sets. Corresponding information is different A normal message containing information corresponding to a lower-level indication among a plurality of indications included in a pair of normal indication relays and a temporary indication relay operation overlap, and a different verification content is established. A pair of blocking messages is included, and a selection unit that selects a message corresponding to the current indication of the traffic light from among the plurality of sets of messages is to be read by the message selection unit. An ATS-P ground unit with a failure detection function, which is provided by being incorporated or added.   The telegram storage unit holds a pair of collation establishment prevention messages that are different in content and do not correspond to the indication of the traffic signal, and the selection means is the type of indication of the traffic signal. 2. The ATS-P with a fault detection function according to claim 1, wherein when a subject that does not correspond to the above is read, a set of the verification establishment prevention messages is read from the message storage unit. Ground child.   The transmission message and the non-transmission message in the same group held in the storage area are not completely the same at the bit level, but are completely the same when each bit is inverted, the collating means 3. The message comparison is performed by bit-inverting any one of the received message to be compared and the non-transmission message to be compared. ATS-P ground unit with fault detection function.

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