JP2012148660A - Ats-p ground element with failure detecting function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a simpler construction to achieve an ATS-P ground element with a failure detecting function which can detect a failure with a telegram memory and a transmitter.SOLUTION: This ground element includes: transmission means 21 and 22, which send a telegram Ma for transmission including information for train stop control onto a track 11 in waves of 1.7 MHz, reception means 23 and 24, which receive the waves and generate a received telegram Mb, a telegram generating means 41, which holds a telegram Ma for transmission and a telegram Mc not for transmission with the same content as it in the different storage areas of a telegram memory 43, reads out the telegram Ma for transmission from the telegram memory 43, sends it to the transmission means 21 and 22, and reads out a telegram Mc not for transmission, too, at that time, and a collation means 45, which compares the received telegram Mb with the telegram Mc not for transmission and makes it normal if they are in accord and makes it abnormal if they are not in accord.

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. 7 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. 7A) 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.
Then, the code processor inputs the signal device indications GR and YR as relay signals from the instrument box 14 and sends the indication information and distance information to the signal device 13 to the repeater. Therefore, the on-board device of the train 12 that has traveled there 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. 7B), a receiving system from the on-board device is omitted, and a transmission system to the on-board device and a failure detection system useful for explaining the present invention will be described.
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 presents GR and YR, and determines the corresponding transmission telegram Ma (see FIG. 7C). A message generation means for generating, a modulation means for transmitting the transmission message Ma to the relay, a demodulation means for obtaining the received message Mb returned from the relay, and the transmission message Ma and the reception message Mb A comparison means for checking whether or not they match and a failure processing means for cutting off the power supply to the repeater to the power feeding unit if the repeater or the ground element is out of order if the comparison result does not match; It 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. 8 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 teletext 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. 8A) also includes an on-board device mounted on a train 12 traveling on a 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, the ATS-P (N) ground elements are distributed at appropriate distances from the traffic light 13 (in FIG. The signal indications GR and YR are directly input from the appliance box 14 by relay signals 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 is like that. 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 power wave of 245 kHz, inputs the signal indications GR and YR, and transmits information radio waves. . 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. 8B). And the transmission message Ma (see FIG. 8C) corresponding to the transmission signal Ma (see FIG. 8C) is determined based on the signal indications GR and YR to determine whether the indication of the signal 13 is the G indication, the Y indication or the R indication. The message generation means 31 that reads and generates a non-transmission message Mc having the same content from another message ROM and generates it, and collates two identical messages Ma and Mb output from the plurality of message ROMs. And the above-described modulation circuit 21 and the transmission coil 22 adapted to a radio wave of 1.7 MHz, and the transmission circuit Ma is allowed to be sent out on the vehicle by the modulation circuit 21 when matching is matched. Modulate message transmission when there is a discrepancy And it comprises a failure processing circuit 36 to prohibit the road 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.
Further, the message generation 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 for outputting the transmission message Ma and the non-transmission message Mc three by three, and the G indication GR of the signal indication GR, YR output from the instrument box 14 by the relay GPR and the Y indication The relay YPR receives the indication YR and selects one of the three transmission messages Ma by 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 sending out 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.

JP 2006-338094 A JP-A-8-2414 JP 2001-199335 A

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

Thus, in the conventional ATS-P system, in the case of the ATS-P system with a repeater failure detection function (refer to the conventional example 1), the repeater having the modulation circuit and the ground unit having the transmission coil are collectively encoded. Since the diagnosis is performed by the processor, the reliability is high. However, since the 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 generation 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 generation 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 to be transmitted in addition to the 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. It is considered that this is a simple solution.

However, such a straightforward configuration is still complicated, although it can be realized at a relatively low cost without using a fail-safe computer.
Therefore, it is an important technical problem to realize an ATS-P ground unit with a failure detection function capable of detecting a failure not only to the message storage unit but also to the transmission unit with a simpler configuration.
Further, it is a further technical problem to increase the number of parts where a failure can be detected by collation.
Furthermore, it is a technical problem to simply ensure the reliability of the verification means.

In addition, since the conventional ATS-P (N) ground unit with a telegram checking function operates only when a 245 kHz power wave is received, failure detection after the train has approached the place where the power wave can be received. Therefore, even if a failure is detected, the train is affected by the failure. Therefore, in order to further improve the safety, it is desirable to improve so that failure detection and the output of the result can always be performed.
Also, when a failure is detected, it is highly possible that there is an error in the content of the message, so it is preferable to avoid sending a message.

  The ATS-P ground unit with a failure detection function of the present invention (Solution 1) was created to solve such a problem, and includes information for train stop control stored in a message storage unit. A transmission means for transmitting a transmission message, a reception means for receiving the transmission message and generating a reception message, and a non-transmission message having the same contents as the transmission message and the transmission message in the message storage unit And a message storage unit for storing the received message and a non-transmission message for comparison, and a matching unit for determining that there is an abnormality when the message does not match.

  In other words, a telegram storage unit that holds a transmission telegram including information for train stop control and a non-transmission telegram having the same content as the transmission telegram, and a transmission unit that transmits the transmission telegram by radio wave on the track And receiving means for receiving the radio wave and generating a received message, and comparing means for comparing the received message and the non-transmission message to determine that there is an abnormality if they do not match.

  In other words, 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, the transmission telegram and the same as the transmission telegram A message generation that holds a non-transmission message of contents in a different storage area of the message storage unit, reads the transmission message from the message storage unit and sends it to the transmission means, and at that time also reads the non-transmission message And a verification unit that compares the received message and the non-transmission message with each other when they match and makes a normal when they do not match.

  Further, the ATS-P ground unit with a failure detection function of the present invention is (Solution means 2), and the ATS-P ground unit with the failure detection function of the above solution means 1, wherein the message storage unit is used as the current signal display information. A message group in which the corresponding non-transmission message that is the same as the transmission message and the transmission message corresponding to each other, and a plurality of the message groups having different message contents between the groups, and the message contents in the group It comprises a selecting means for storing different collation establishment prevention message sets and selecting a message set corresponding to the present information of the traffic signal from the plurality of message establishments and the collation establishment prevention message sets.

  In other words, the ATS-P ground unit with the failure detection function of the solving means 1, wherein the message storage unit is a message set in which the transmission message and the non-transmission message are set as one set. A plurality of message groups having different message contents and a matching establishment prevention message group having different message contents within the group, and the traffic signal from the plurality of message sets and the matching establishment prevention message group There is provided a selection means for selecting a message set corresponding to the current display information.

  In other words, in the ATS-P ground unit with the failure detection function of the solution 1, the message storage unit holds a plurality of sets of the transmission message and the non-transmission message, and the plurality of sets The telegrams in the group have the same content, but the information differs depending on the type of traffic signal display between the groups. Is included in or added to the message generation unit, and the message storage unit includes a set of collation establishment prevention messages whose contents are different in each group. And when the selection means does not correspond to the type of indication of the traffic signal, the collation is performed instead of the pair of the transmission message and the non-transmission message from the message storage unit. Read the message for preventing establishment Characterized in that it is so issued.

Further, the ATS-P ground element with a failure detection function of the present invention (Solution means 3) is an ATS-P ground element with a failure detection function of the above solution means 1 and 2, and receives operating power from the outside. A power supply circuit that generates power is provided, and a power supply line switching circuit that cuts off power supply to the power supply circuit when the verification by the verification unit is abnormal is provided.
In other words, the ATS-P ground unit with the failure detection function of the solving means 1 and 2 is provided with a power supply circuit that receives power from the outside and generates operating power, and the result of collation with the abnormality is the output circuit. A power supply line switching circuit that cuts off the power supply to the power supply circuit when output from is provided inside or outside.

Further, the ATS-P ground unit with a failure detection function of the present invention (Solution means 4) is the ATS-P ground unit with a failure detection function of the above solution means 1 to 3, and is held in the storage area. The transmission message and the non-transmission message in a plurality of message sets are the same message when each bit is inverted, and the collating means is either the reception message or the non-transmission message. One of them is characterized in that a message comparison is performed after bit inversion.
In other words, in the ATS-P ground unit with the failure detection function of the solving means 1 to 3, the transmission message and the non-transmission message in the same group held in the storage area are bit levels. Is not exactly the same, but is completely the same when each bit is inverted, and the collating means reverses the bit of either the received message or the non-transmitted message to be compared, and then the message A comparison is made.

In such an ATS-P ground unit with a failure detection function according to the present invention (Solution 1), the collation target is a received message and a non-transmission message. The means are reduced and it is simple. 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.
Therefore, according to the present invention, an ATS-P ground unit with a failure detection function capable of detecting a failure not only to the message storage unit but also to the transmission unit can be realized with a simple configuration.

Further, in the ATS-P ground unit with a failure detection function of the present invention (solution 2), it corresponds to the fact that there are a plurality of indications of information source signals as in the case of the conventional example 2 described above. Although there are multiple pairs of transmission messages and non-transmission messages and selection means are provided, not only that, but also a pair of collation establishment prevention messages whose contents differ between the groups in the message storage unit In addition, when a failure occurs in the selection means and a signal that does not correspond to the type of indication of the traffic light is to be read, a collation establishment prevention message set is read, and a transmission message is not Since the processing related to the transmission message is performed, the received message and the non-transmission message do not match and a result of collation with the abnormality is generated, so that even the failure of the selection means is detected.
Therefore, according to the present invention, it is possible to realize an ATS-P ground unit with a failure detection function capable of detecting a failure not only with respect to a message storage unit and a transmission unit but also with a simple configuration.

Furthermore, in the ATS-P ground unit with a failure detection function according to the present invention (solution 3), a power supply circuit that receives power from the outside to generate operating power is provided. In addition, the result output is always performed without being restricted by whether or not the train is approaching.
When a result of collation with an abnormality is output, the power supply to the power supply circuit is cut off, and the operation of the entire ground unit is stopped, so that no telegram transmission is performed. Therefore, transmission of a message is avoided when a failure is detected.

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 production | generation 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. It is a block diagram which shows the structure of the ATS-P ground unit with a failure detection function of a fixed information type about Example 2 of this invention. It is a block diagram which shows the structure of the ATS-P ground unit with a failure detection function which added the feeder line switching circuit outside about Example 3 of this invention. 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.

With respect to the ATS-P ground unit with a failure detection function of the present invention as described above, specific modes for carrying out this will be described with reference to the following Examples 1 to 3.
The embodiment 1 shown in FIGS. 1 to 4 is a three-display information switching type that embodies the above-described solving means 1 and 2 (claims 1 and 2 at the beginning of the application), and the embodiment shown in FIG. Example 2 is a fixed information form that embodies the above-described solution 1 (claim 1 at the time of filing), and Example 3 shown in FIG. 3).
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 element with a failure detection function according to the first embodiment (three-indication 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 units 40, 40a and 40b with failure detection functions are installed, FIG. 1B is a block diagram of one ground unit 40, and FIG. ) Is a message frame configuration diagram. 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 generation 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. Then, the signal indications GR and YR are input as relay signals from the instrument box 14 of the signal device 13, and a telegram including appropriate information corresponding to the indication is transmitted on the track 11 with a radio wave of 1.7 MHz. Unlike ground unit 30 Since it is a power source grounding element that receives DC power DC135V from the instrument box 14 and operates at all times, it is not necessary to receive 245 kHz radio waves from the on-board device of the train 12, and the result of checking whether it is normal or abnormal The failure 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 ATS-P ground device with a repeater failure detecting function described above Has taken over. In addition, the ATS-P (N) ground unit 30 with the telegram checking function described above follows the basic concept of the telegram generating means 31, the collating circuit 35, etc. The ground unit 40 is modified for simplification of configuration, and includes a telegram generation means 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 generation means 41 (see FIGS. 1B and 2) is a selection circuit that consists of a relay circuit, receives the signal indications GR and YR by the relays GPR and GYR, and selects a transmission message Ma corresponding to the indication. 42, 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 in different storage areas, and a counter-based circuit for example, and the count value is sent to the message for transmission A reading circuit 44 that generates a read address of the message storage unit 43 by incrementing it according to the modulation timing of Ma, etc., and reading the transmission message Ma from the message storage unit 43 and transmitting means 21, 22 The non-transmission message Mc having the same contents is also read in parallel with the reading of the transmission message Ma. If the reading of both messages Ma and Mc from the message storage unit 43 is in bit units, timing adjustment is performed by a latch or the like, but if a plurality of units such as bytes or words are performed, parallel-serial conversion is performed by a shift register or the like. (See FIG. 3).

  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. The other contact state is an abnormal state that occurs when a contact failure or other failure occurs, and other values are generated as partial addresses.

  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. ”To“ 1CF ”holds G-present messages, and storage areas“ 030 ”to“ 03F ”and storage areas“ 130 ”to“ 13F ”hold Y-present messages, respectively. A message of R indication is held in each of “000” to “00F” and storage areas “100” to “10F”, and collation is established at the address “0 **” for the storage areas of other addresses. The blocking message “1... 1” is held, and the collation establishment blocking message “0... 0” is held at the address “1 **” (* is a single digit hexadecimal number “0”. Any of “˜F”).

  In the message generation 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 the selection circuit 42 sets the intermediate one digit. 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, a plurality of sets of the transmission message Ma and the non-transmission message Mc have the same contents within the set, but the type of display of the traffic light 13 between the sets, that is, the G display or the Y display The information differs depending on whether the R current indication is present, and the selection circuit 42 selects the one corresponding to the current current indication of the traffic light 13 from a plurality of sets of the telegraphic message Ma and the non-transmission message Mc. This is to be read by the message generation means 41. In the ground unit 40, the selection circuit 42 is incorporated in the message generation unit 41. However, the selection circuit 42 may be added to the front or rear stage of the message generation unit 41.

  Furthermore, the message storage unit 43 is a storage area that can be read, except for a storage area that holds a pair of a transmission message Ma and a non-transmission message Mc. In the storage area, a set of collation establishment prevention messages “1... 1” and “0... 0” which have different values for each bit by having an inverted value for each bit are stored and held. ing. Further, when the selection circuit 42 selects a signal that does not correspond to the type of display of the traffic light 13 as a reading target of the message generation means 41, the message storage unit 43 replaces the transmission message Ma with the non-transmission message Mc. Thus, the above-described collation establishment prevention message set “1... 1”, “0. 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 to a DC signal and drives the relay NRM1. .
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 power of DC 5V is continuously supplied to the message generation means 41 and the collation circuit 45, DC power of DC 48V 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, the on-board device of the train 12 receives 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. In this case, the cyclic redundancy check code CRC has an illegal value so that it is not undesirably accepted.

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.
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 traffic signal indications GR and YR are sent from the device box 14 to the ground unit 40 via a cable as relay signals. If there is no abnormality in the ground unit 40, the traffic signal indications GR and YR are displayed based on the traffic signal indications GR and YR. A transmission message Ma (see FIG. 1C) including appropriate information corresponding to the indication is generated by the ground unit 40 (see FIG. 1B), and the message is transferred to the orbit 11 at 1.7 MHz. It is transmitted by radio waves (see FIG. 1 (a)). 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. Appropriate speed check pattern P is generated depending on whether the signal indication is G indication, Y indication or R indication, and the train stop control of train 12 is performed based on it. Is called.

  The generation and transmission of the transmission message Ma in the ground unit 40 will be described in detail (see FIGS. 1B and 3). Of the signal indication GR and YR input to the message generation means 41, the G indication GR The signal is converted into a 2-bit partial address at the first contact point GPR1 and the second contact point GPR2 of the relay GPR of the selection circuit 42 and incorporated in the address designation of the message storage unit 43, and the Y indication of the signal indications GR and YR. The YR signal is also converted into a 2-bit partial address at the first contact YPR1 and the second contact YPR2 of the relay YPR of the selection circuit 42 and incorporated into the addressing of the message storage unit 43. Of these, the remaining bits are supplemented by the reading circuit 44, and 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 the different storage areas, and the non-transmission message Mc is read from the other “000” 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. The same applies to Y display and R display. On the other hand, when there is a malfunction such as a contact failure in the relays GPR and YPR, the collation establishment prevention message “1... 1” is read instead of the transmission message Ma, and the bit reversed state with respect to the message. The collation establishment prevention message “0... 0”, which is different from each other, is read instead of the non-transmission message Mc. 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 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 verification establishment prevention message “1... 1”, the non-transmission message Mc candidates are the same, and the normal G message, Y message, and R message only. It is also expanded to the collation establishment prevention message “0. Therefore, when a failure of the relay contact or the like occurs in the selection circuit 42, the collation establishment prevention message set “1... 1”, “0. The

  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 generation means 41 are all normal, the contents of the message will be lost in the process of obtaining the reception message Mb from the transmission message Ma if the transmission means 21, 22 and the reception means 23, 24 are defective. 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 track record in the bus data comparison circuit of an electronic interlocking device. Yes, it can be said that the probability of erroneously issuing an alternating signal due to its own circuit failure is zero (0).
In addition, 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 ATS-P ground element 50 (fixed information type) with a failure detection function of the present invention, whose block diagram is shown in FIG. 5, is different from the ground element 40 of the first embodiment described above. This is the point that the message generation means 41 is replaced with the message generation means 51.
The ground unit 50 directly discards the function of switching the contents of the transmission message Ma and the non-transmission message Mc in response to the signal display by directly taking the signal display information from the instrument box 14 of the traffic light 13. Only one fixed message is transmitted, and the failure detection function and the power source of the present invention are added to an old type non-powered ground element than the ATS-P (N) ground element.

  In this case, since there is no input of the signal indications GR and YR, there is no selection circuit 42, and it is not necessary to detect the failure, the message storage unit 53 instead of the message storage unit 43 has a transmission message with the same contents. It suffices if there is a storage capacity capable of holding Ma and a non-transmission message Mc in different storage areas, and the reading circuit 54 only needs to be able to read a set of both messages Ma and Mc. The other circuits 21 to 24 and 45 to 47 are inherited from the ground element 40 and remain the same as those of the first embodiment described above. Therefore, it can be used as a fixed information type ATS-P ground unit, and the failure detection function is the same as that of the above-described ground unit 40 except that the detection of the failure of the non-existing selection circuit is unnecessary. And the failure of the own device is accurately detected.

  6 is different from the above-described ground element 40 (or 50) of the first embodiment (or 2) in the ATS-P ground element with a failure detection function according to the present invention whose ground equipment is shown in a block diagram in FIG. (Or 50) A feeder line switching circuit 60 (fault processing circuit) is added to each.

  The feeder line switching circuit 60 may be built in the ground unit 40, but is provided in a connection box near the ground unit 40 here. The junction box relays a cable connecting the instrument box 14 and the ground element 40, 40a in the vicinity of the ground element. The ground element 40 serves as a feeder line from the instrument box 14 to the power supply circuit 47, and a DC 135V branch line from the junction box. Is drawn in. The power supply line opening / closing circuit 60 continues or stops power supply to the power supply circuit 47 by opening and closing the branch line and switching between a conductive state and a cut-off state. A specific configuration example using a relay will be described. The feed line switching circuit 60 is mainly configured by a relay NRM1 whose contact is driven by a relay drive signal from the output circuit 46, and the relay contact NRM1 is the branch line. A manually operated normally open switch SW1 is connected in parallel to the relay contact NRM1, and a CR charge / discharge circuit is connected in parallel to the coil portion of the relay NRM1.

  When the switch SW1 is operated and closed, power is supplied to the ground unit 40, the ground unit 40 starts operating, and if the ground unit 40 is normal, the relay drive signal becomes a normal value (on state). Since the relay contact NRM1 is closed and the power supply line is turned on, the relay NRM1 is in a self-holding state. Therefore, even if the switch SW1 is stopped and opened, the power supply to the ground unit 40 is continued. Then, when some part of the ground element 40 breaks down and the relay drive signal becomes zero (OFF state), the relay contact NRM1 is opened and the power supply line is cut off, thereby releasing the self-holding of the relay NRM1. The child 40 stops operating because the power supply is cut off. Therefore, when a failure is detected, there is no possibility that a message that may contain an error is transmitted from the ground unit 40 to the train 12, so the safety is remarkably high.

  Further, the CR charge / discharge circuit of the feeder line switching circuit 60 has a temporary relay drive signal due to a short-time mismatch in the verification circuit 45 (for example, a transient verification mismatch when the signal display changes). In order to prevent the relay NRM1 from responding to a minor malfunction that is only zero (0) at this time and excessively stopping the ground element 40, the sensitivity of the relay NRM1 is reduced to, for example, about several hundred ms. A charge / discharge time constant is set. In addition, when a temporary and minor trouble reaches the transmission message Ma, a part of the transmission message Ma is damaged. In this case, the size of the on-board device of the train 12 is usually reduced. Click redundancy check (CRC) eliminates unwanted telegrams.

[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.

The ATS-P ground element with a failure detection function of the present invention is not limited to the fixed information type and the three-indication information switching type described above, but can be applied to other numbers of information switching types. .
Moreover, it 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 (railroad track), 12 ... Train (on-board equipment), 13 ... Traffic light, 14 ... Instrument box,
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 generating means (multiplex), 32 ... selection circuit, 33 ... telegram storage unit (ROM),
34 ... Reading circuit, 35 ... Verification circuit, 36 ... Failure processing circuit,
37 ... power supply circuit, 38 ... receiving coil (electromagnetic antenna for power acquisition),
40, 40a, 40b ...
41 ... telegram generation 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,
50 ... ground child, 51 ... message generating means, 53 ... message storage (ROM),
54 ... Reading circuit, 60 ... Power supply line switching circuit (Failure processing circuit)

Claims (4)

Transmitting means for transmitting a transmission telegram including information for train stop control stored in the telegram storage unit;
Receiving means for receiving the transmission message and generating a reception message;
A message storage means for storing in the message storage unit a non-transmission message having the same content as the transmission message and the transmission message;
An ATS-P ground unit with a failure detection function, comprising: a collating unit that compares the received telegram with the non-transmission telegram to determine that there is an abnormality when they do not match. The message storage unit is a message set in which the transmission message corresponding to the display information of the traffic signal and the non-transmission message that is the same as the transmission message are a set, and a plurality of message contents differ between the sets. The message set;
Memorize the collation establishment prevention message group with different message contents in the group,
The ATS-P ground with a fault detection function according to claim 1, further comprising selection means for selecting a message set corresponding to the present information of the traffic signal from the plurality of message sets and the verification establishment prevention message set. Child. A power supply circuit that receives power from outside and generates operating power is provided.
If the verification by the verification means is abnormal,
3. The ATS-P ground element with a failure detection function according to claim 1, further comprising a power supply line switching circuit that cuts off power supply to the power supply circuit. The transmission message and the non-transmission message in the plurality of message sets held in the storage area are:
This message is the same when each bit is inverted.
The matching means is
The ATS-P ground unit with a fault detection function according to any one of claims 1 to 3, wherein a message comparison is performed after bit inversion of any one of the reception message and the non-transmission message. .

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