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EP2591974A2 - Information transmission device and information transmission method - Google Patents

Information transmission device and information transmission method Download PDF

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Publication number
EP2591974A2
EP2591974A2 EP20120191372 EP12191372A EP2591974A2 EP 2591974 A2 EP2591974 A2 EP 2591974A2 EP 20120191372 EP20120191372 EP 20120191372 EP 12191372 A EP12191372 A EP 12191372A EP 2591974 A2 EP2591974 A2 EP 2591974A2
Authority
EP
European Patent Office
Prior art keywords
data
information
data processing
relay
transmission line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20120191372
Other languages
German (de)
English (en)
French (fr)
Inventor
Yoshinori Okura
Yutaka Sato
Koichi Nakanishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP2591974A2 publication Critical patent/EP2591974A2/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
    • B61L25/02—Indicating or recording positions or identities of vehicles or trains
    • B61L25/028—Determination of vehicle position and orientation within a train consist, e.g. serialisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L15/00—Indicators provided on the vehicle or train for signalling purposes
    • B61L15/0018—Communication with or on the vehicle or train
    • B61L15/0036—Conductor-based, e.g. using CAN-Bus, train-line or optical fibres

Definitions

  • the present invention relates to an information transmission system installed in railway cars.
  • the number of cars and the arrangement order of cars within a train set may dynamically change, for example, plural train sets are coupled and travel as a single train set or a single train set is split into plural train sets to travel.
  • some of parameters that are necessary for a transmission device constituting the information transmission system to transmit and receive data or to relay data may be set in accordance with the number of cars and the arrangement order of cars within the train set.
  • An example of such parameters is IP (Internet Protocol) address. If information about what ordinal number the car is from the first car or about the car number is included in a bit string of an IP address, the positional relation of a transmission destination within the train set is made clear simply by referring to the IP address of the transmission destination without having to analyze the content of data. Thus, processing load related to transmission, reception and relay of data is reduced.
  • This system employs TCP (Transmission Control Protocol)/IP or UDP (User Datagram Protocol)/IP as a transmission protocol.
  • TCP Transmission Control Protocol
  • UDP User Datagram Protocol
  • a train set identification number and a transmission device identification number are allocated to the third byte and the fourth byte of an IP address.
  • the IP addresses of transmission devices in the first car and the last car or in the end cars coupled to each other of different train sets are fixed. Thus, even when the number of cars within a train set is increased or decreased, the IP addresses of the other transmission devices are allocated with reference to the transmission devices having the fixed IP addresses.
  • the IP addresses of the transmission devices in the first car and the last car or in the end cars coupled to each other of different train sets are fixed, or position information within the train set of the cars where a transmission device is installed (the first car or the last car, or the end cars coupled to each other of different train sets) is reported from a car equipment, and IP addresses are automatically set based on the information.
  • the IP addresses In the case where the IP addresses are fixed, the IP addresses need to be preset before the transmission device is installed in the cars, or work of setting the IP addresses using a setting switch (DIP switch, rotary switch or the like) and a setting terminal or the like is necessary after the installation in the cars.
  • a setting switch DIP switch, rotary switch or the like
  • a setting terminal or the like is necessary after the installation in the cars.
  • the IP addresses are preset before the transmission device is installed in the cars
  • a transmission device for another car cannot be used to replace the device when a failure occurs, and a device for replacement needs to be prepared for each car. Therefore, there is a problem of high cost.
  • the IP address is set after the installation in the cars, the amount of work increases at the time of installation in the cars and therefore there is a problem that a setting error may occur.
  • IP addresses are automatically set by the above techniques
  • a function or device to notify a transmission device of the position information within the train set of the cars where the transmission device is installed (the first car or the last car, or the end cars coupled to each other of different train sets) is necessary on the car side. Therefore, there is a problem that the number of devices and the number of components increase.
  • the invention provides an information transmission method and device in which with respect to not only a transmission device but also other devices installed in cars, presetting or notification of position information within a train set of cars where the device is installed is not necessary before the device is installed in the cars, and in which the position information and the arrangement order within the train set of the cars where the device is installed can be detected by mutual exchange of information between plural devices.
  • an object of the invention is to provide an information transmission method and device in which the devices can determine and automatically set information such as IP address based on the detected position information and arrangement order.
  • an information transmission device for a railway car for transmitting data between railway cars of a train set made up of plural railway cars includes: a relay device which is connected with a relay device of a next car via a main transmission line and carries out relay processing of data received from the next car; and a data processing device connected with the relay device via a branch transmission line.
  • the relay device When the data processing device outputs data including information of a transmission direction to the relay device, the relay device has a unit which decides a relay direction of the data in accordance with the information of the transmission direction included in the data received from the branch transmission line or the main transmission line.
  • the data processing device detects a position of own device in the train set from the data received from the relay device.
  • a relay device which is connected with a relay device installed in a next car via a main transmission line and carries out relay processing of data received from the next car, and a data processing device connected with the relay device via a branch transmission line are provided, and data is transmitted between railway cars of a train set made up of plural railway cars.
  • the method includes: a step in which data including information of a transmission direction is outputted from the data processing device to the relay device; a step in which the relay device, receiving the data, decides a relay direction of the data in accordance with the information of the transmission direction included in the data; and a step in which the data processing device, receiving the data, detects a position of own device in the train set in accordance with the number of times the data is received.
  • presetting or notification of the position information within the train set of the cars where the device is installed is not necessary before the device is installed in the cars. Therefore, a device for another car can be used without changing the setting to replace the device when a failure occurs. Also, since the work of setting the position information and the arrangement order using a setting switch (DIP switch, rotary switch or the like) and a setting terminal or the like is not needed after the installation in the cars, no setting error occurs.
  • a setting switch DIP switch, rotary switch or the like
  • the device can detect the position information and the arrangement order of the car within the train set, and information such as IP address can be determined and automatically set in the device based on the detected position information and arrangement order. Therefore, cases where the car configuration within the train set dynamically changes, such as where plural train sets are coupled or a train set is split into plural train sets, can be dealt with.
  • a relay device and a data processing device need not have, in advance, position information in the train set of the car where the own device is installed, such as car number, and information about the arrangement order relative to other data processing devices.
  • position information such as car number
  • information about the arrangement order relative to other data processing devices When new position information or information about a new arrangement order is needed, for example, when power is switched on or reset is carried out, or when the train set configuration is changed by coupling of or splitting into plural train sets, each data processing device transmits position confirmation data to a branch transmission line.
  • the position confirmation data includes information designating a transmission direction to a main transmission line or branch transmission line.
  • the information designating the transmission direction included in the position confirmation data transmitted by all the data processing devices is the same.
  • different information may be defined for each of the types, as the information designating the transmission direction.
  • Each relay device decides in advance the correspondence between the information designating the transmission direction included in the position confirmation data and the direction in which the position confirmation data is relayed such as the main transmission line or the branch transmission line.
  • the relay device receives the position confirmation data
  • the relay device relays the position confirmation data in the direction that is decided in advance.
  • the correspondence is the same for all the relay devices and the result is the same whichever car the relay device is connected to.
  • Each data processing device determines the position information of the own device, the information about the arrangement order and the like, based on the number of position confirmation data and the data contents received from the relay device.
  • FIG. 1 shows an example of configuration of an information transmission system according to the first embodiment.
  • a train set is made up of plural cars 1.
  • Each car 1 includes a relay device 2 for transmitting and receiving or relaying data between cars, a main transmission line 9 connecting the relay device 2 of each car, a data processing device 990 which is installed in each car and controls train traveling functions such as electric motor and brake, or controls other functions than the train traveling functions such as air conditioning and interior lights, and a branch transmission line 99 connecting the relay device 2 and the data processing device 990.
  • FIG. 2 shows the configuration of the relay device 2.
  • the relay device 2 shown in FIG. 2 includes a data relay unit 3 and a data distribution unit 4.
  • the data relay unit 3 has a function of carrying out processing to relay data received from one side of the main transmission line 9 to the other side of the main transmission line 9, send to the data distribution unit 4 data to be relayed from the main transmission line 9 to the branch transmission line 99, and relay data received from the branch transmission line 99 via the data distribution unit 4 to the main transmission line 9, or the like.
  • the data relay unit 3 also stores "destination information" indicating the destination of data such as a destination address in association with information indicating the main transmission line and the branch transmission line of the relay destination. For example, as shown in FIG. 2 , ports of transmission lines held by the data relay unit 3 are numbered (1), (2) and (3), and information that data with destination information "A” should be relayed only to the ports (1) and (2) whereas data with destination information "B” should be relayed only the ports (2) and (3), or the like is stored.
  • the data distribution unit 4 is a part of the branch transmission line 99 and has a function of connecting plural data processing devices 990 to the relay device 2.
  • the data relay unit 3 uses a switching hub or layer-3 switch that is used in a LAN conforming to the IEEE 802.3 standard, and that an IP address or MAC address is used as the destination information. It is also assumed that a function is provided that enables fixed setting of a specific destination address and a relay destination port. Such a function can be realized, for example, by using a static MAC address setting function installed in KS8995MA, which is a switching device made by MICREL INC.
  • the following explanation is based on the assumption that a LAN conforming to the IEEE 802.3 standard is used for the main transmission line 9 and the branch transmission line 99 and that a switching hub or repeater hub used in a LAN conforming to the IEEE 802.3 standard is used for the data distribution unit 4.
  • the data distribution unit 4 at least has a function of connecting the data relay unit 3 to plural data processing devices 990 and relaying data between these units without altering the data. Therefore, the data distribution unit 4 is considered to be a part of the branch transmission line 99 hereinafter.
  • each data processing device 990 transmits a position confirmation packet 301 including information designating a transmission direction to the main transmission line or the branch transmission line, that is, a destination IP address "239.0.0.1" (with a destination MAC address "01-00-5E-00-00-01") as shown in FIG. 4 , to the branch transmission line 99 (detection procedure 9002).
  • the internal data of the packet may have an arbitrary value.
  • all the relay devices 2 installed in each car 1 are set to relay the information designating the transmission direction to the main transmission line or the branch transmission line, that is, the packet including the destination IP address "239.0.0.1" (with the destination MAC address "01-00-5E-00-00-01") as shown in FIG. 4 , to the ports (2) and (3). That is, it means that when the packet with the destination IP address "239.0.0.1" is received from the port (1), the packet is relayed to the ports (2) and (3), whereas when the packet is received from the port (2), the packet is relayed only to the port (3), and when the packet is received from the port (3), the packet is relayed only to the port (2).
  • the ports (1), (2) and (3) of the relay device 2 as shown in FIG. 4 are considered synonymous with the ports (1), (2) and (3) of the data relay unit shown in FIG. 2 .
  • the destination IP address "239.0.0.1" (with the destination MAC address "01-00-5E-00-00-01") is an example in this embodiment and other values may also be used.
  • the relay device 2 receiving the position confirmation packet 301 from the branch transmission line 99, that is, from the port (3), relays the packet only to the port (2) of the main transmission line 9 because the destination IP address is "239.0.0.1".
  • the position confirmation packet 301 reaches the port (1) of a next relay device 2.
  • next relay device 2 when the next relay device 2 receives the position confirmation packet 301 from the port (1) of the main transmission line 9, the next relay device 2 relays the packet to the port (2) of the main transmission line 9 and the port (3) of the branch transmission line 99 because the destination IP address is"239.0.0.1".
  • the position confirmation packet 301 transmitted to the branch transmission line 99 is received by the data processing device 990.
  • the data processing device 990 recognizes the packet as the position confirmation packet 301 because the destination IP address is"239.0.0.1" and increments the number of the position confirmation packets 301 received, by one (detection procedures 9003, 9004, 9005).
  • the data processing device 990 measures time from a certain time point after the occurrence of the event serving as the trigger. After the lapse of a predetermined time period (detection procedure 9006), the data processing device 990 detects the number of the received position confirmation packets 301 and determines the position and arrangement order of the own device (the value of P in detection procedure 9007).
  • the data processing device 990 can set a setting value, for example, IP address or the like, corresponding to the position and arrangement order.
  • whether correct setting is done or not may be checked by making such an arrangement that the information of the position and arrangement order detected by the above procedures, for example, the values of P or P+1, can be displayed on a display unit such as a light emitting diode (LED) or liquid crystal display unit (LCD) mounted on each data processing device 990 which detects the information, and allowing a maintenance worker of the data processing device 990 to view the display unit from outside.
  • a display unit such as a light emitting diode (LED) or liquid crystal display unit (LCD) mounted on each data processing device 990 which detects the information, and allowing a maintenance worker of the data processing device 990 to view the display unit from outside.
  • LED light emitting diode
  • LCD liquid crystal display unit
  • the main transmission line 9 and the branch transmission line 99 are not limited to the LAN conforming to the IEEE 802.3 standard and can be realized by other communication measures, for example, a LAN conforming to the ATM (Asynchronous Transfer Mode) or IEEE 802.5 standard, a field LAN conforming to the IEC 61158 standard or the like.
  • the data relay unit 3 can also be realized with a configuration as shown in FIG. 11 .
  • the data relay unit 3 includes: an arithmetic device 2000 which is equipped with a CPU, a cache memory, a main storage memory or the like and which carries out relay processing of data; a storage device 2003 such as a hard disk, silicon disc or non-volatile memory which stores transmission and reception data, a processing program, initial setting information, log information or the like; a main transmission line interface device 2001 having an interface function for data transmission to and reception from the data relay unit 3 of the counterpart relay device 2 via the main transmission line 9; and a branch transmission line interface device 2002 having an interface function for data transmission to and reception from the data processing device 990 via the branch transmission line 99.
  • an arithmetic device 2000 which is equipped with a CPU, a cache memory, a main storage memory or the like and which carries out relay processing of data
  • a storage device 2003 such as a hard disk, silicon disc or non-volatile memory which stores transmission and reception data, a processing program, initial setting information, log information or the like
  • main transmission line interface device 2001 having an interface
  • the data relay unit 3 may also include, if necessary, an input device 2004 such as a switch or keyboard to input initial setting items like the address and the operation mode of the transmission line, and an output device 2005 such as a light emitting diode (LED) or liquid crystal display unit (LCD) which allows confirmation of the setting items and displays the operation state and log information.
  • an input device 2004 such as a switch or keyboard to input initial setting items like the address and the operation mode of the transmission line
  • an output device 2005 such as a light emitting diode (LED) or liquid crystal display unit (LCD) which allows confirmation of the setting items and displays the operation state and log information.
  • LED light emitting diode
  • LCD liquid crystal display unit
  • the destination information is not limited to destination address.
  • a field indicating the destination information may be provided in a data field.
  • the arithmetic device 2000 determines the transmission line to which data should be relayed, based on the destination information of the data received from the main transmission line interface device 2001 or the branch transmission line interface device 2002, and outputs the data to one or both of the main transmission line interface device 2001 and the branch transmission line interface device 2002.
  • position information within a train set of a car where a device is installed need not be preset or notified of before the device is installed in the car. Therefore, a device for another car can be used without changing the setting to replace the device when a failure occurs. Also, work of setting the position information and arrangement order using a setting switch (DIP switch, rotary switch or the like) and a setting terminal or the like is not necessary after the installation in the car. Therefore, setting errors do not occur.
  • a setting switch DIP switch, rotary switch or the like
  • the position information within the train set of the car where the device is installed is not preset or notified of
  • the position information and the arrangement order within the train set of the car where the device is installed can be detected by mutual exchange of information between plural devices, and information such as IP address can be determined and automatically set in the device based on the detected position information and arrangement order. Therefore, cases where the car configuration within the train set dynamically changes, such as where plural train sets are coupled or a train set is split into plural train sets, can be dealt with.
  • the data processing device 990 can determine the position and arrangement order of the own device from the first car (or the last car) but cannot determine the position and arrangement order from the last car (or the first car) and the total number of data processing devices.
  • All the relay devices 2 installed in each car 1 are set in such a way that information designating a transmission direction to the main transmission line or the branch transmission line, that is, a packet with a destination IP address "239.0.0.2" (with a destination MAC address "01-00-5E-00-00-02") is relayed to the ports (1) and (3), as shown in FIG. 6 .
  • the ports (1), (2) and (3) of the relay device 2 as shown in FIG. 6 are considered synonymous with the ports (1), (2) and (3) of the data relay unit shown in FIG. 2 .
  • the destination IP address "239.0.0.2" (with the destination MAC address "01-00-5E-00-00-02") is an example in this embodiment and other values may also be employed.
  • each data processing device 990 transmits a second position confirmation packet 302 including the information designating the transmission direction to the main transmission line or the branch transmission line, that is, the destination IP address "239.0.0.2" (with the destination MAC address "01-00-5E-00-00-02") as shown in FIG. 6 , in addition to the position confirmation packet 301 to the branch transmission line 99 (detection procedure 9011).
  • the internal data of the packet may have an arbitrary value.
  • the relay device 2 receiving the second position confirmation packet 302 from the branch transmission line 99, that is, from the port (3), relays the packet only to the port (1) of the main transmission line 9 because the destination IP address is "239.0.0.2".
  • the second position confirmation packet 302 reaches the port (2) of a next relay device 2.
  • next relay device 2 when the next relay device 2 receives the second position confirmation packet 302 from the port (2) of the main transmission line 9, the next relay device 2 relays the packet to the port (1) of the main transmission line 9 and the port (3) of the branch transmission line 99 because the destination IP address is"239.0.0.2".
  • the second position confirmation packet 302 transmitted to the branch transmission line 99 is received by the data processing device 990.
  • the data processing device 990 recognizes the packet as the second position confirmation packet 302 because the destination IP address is"239.0.0.2" and increments the number of the second position confirmation packets 302 received, by one (detection procedures 9012, 9013, 9014).
  • the data processing device 990 measures time from a certain time point after the occurrence of the event serving as the trigger. After the lapse of a predetermined time period (detection procedure 9006), the data processing device 990 detects the number of the received second position confirmation packets 302 and determines the position and arrangement order of the own device (the value of Q in detection procedure 9015).
  • the data processing device 990 can determine the position and arrangement order thereof and the total number of data processing devices. That is, the total number of the data processing devices 990 is (P+Q+1) and the position of the own device within the train set is the (P+1)th from the first cart and the (Q+1)th from the last car. If each car is equipped with one data processing device each, it is understood that the number of cars in the train set is (P+Q+1) and that the own device is installed in the (P+1)th car.
  • a setting value for example, an IP address or the like can be set to device.
  • whether correct setting is done or not may be checked by making such an arrangement that the information of the position and arrangement order detected by the above procedures, for example, the values of P, Q, P+1, Q+1, P+Q+1 or the like, can be displayed on a display unit such as a light emitting diode (LED) or liquid crystal display unit (LCD) mounted on each data processing device 990 which detects the information, and allowing a maintenance worker of the data processing device 990 to view the display unit from outside.
  • a display unit such as a light emitting diode (LED) or liquid crystal display unit (LCD) mounted on each data processing device 990 which detects the information, and allowing a maintenance worker of the data processing device 990 to view the display unit from outside.
  • LED light emitting diode
  • LCD liquid crystal display unit
  • the total number of devices installed in the train set can be detected and what ordinal number of position the device is installed from the first car and the last car can be determined in all the devices within the train set. Therefore, the position of the own device in the train set can be accurately grasped.
  • the configuration after autonomous change of each data processing device that is, the position of the own device within the train set, can be detected.
  • the main transmission line 9 and the branch transmission line 99 have a single-line configuration.
  • the main and branch transmission lines 9, 99 and the relay device 2 may be configured in multiple lines.
  • each relay device 2 the main transmission line and the branch transmission line are configured in dual lines, as shown in FIG. 7 .
  • One of the two lines is referred to as line 1.
  • a line 1 main transmission line 91 and a line 1 branch transmission line 991 are connected.
  • the other line is referred to as line 2.
  • a line 2 main transmission line 92 and a line 2 branch transmission line 992 are connected.
  • the line 1 branch transmission line 991 and the line 2 branch transmission line 992 are connected to the data processing device 990 in each car 1.
  • the data processing device 990 carries out processing similar to the first embodiment or the second embodiment, separately to the line 1 and the line 2. That is, detection of the number of relay devices and the arrangement order is separately carried out in the line 1 and the line 2 and the detection results in the two lines can be compared. If there is a difference between the two detection results as a result of the comparison, it can be understood that there is failure occurring in one of the lines.
  • FIG. 8 For example, a case where a transmission line failure occurs is shown in FIG. 8 .
  • FIG. 8 shows an example in which a failure occurs in the line 1 main transmission line 91 between the second car and the third car.
  • each data processing device installed in each car can determine the position of the own device, the number of cars, and the site where a failure occurs. That is, the data processing device a can determine that there are four cars, that the own device is in car No.1, and that there is a failure occurring in the line 1 main transmission line 91 between cars No.2 and No.3. The data processing device b can determine that there are four cars, that the own device is in car No.2, and that there is a failure occurring in the line 1 main transmission line 91 between cars No.2 and No.3.
  • the data processing device c can determine that there are four cars, that the own device is in car No.3, and that there is a failure occurring in the line 1 main transmission line 91 between cars No.2 and No.3.
  • the data processing device d can determine that there are four cars, that the own device is in car No.4, and that there is a failure occurring in the line 1 main transmission line 91 between cars No.2 and No.3.
  • each data processing device or not may be checked by making such an arrangement that the information of the position and arrangement order in the train set detected by the above procedures, for example, the values of P, Q, P+1, Q+1, P+Q+1 or the like, can be displayed on a display unit such as a light emitting diode (LED) or liquid crystal display unit (LCD) mounted on each data processing device 990 which detects the information for each line, and allowing a maintenance worker of the data processing device 990 to view the display unit from outside.
  • a display unit such as a light emitting diode (LED) or liquid crystal display unit (LCD) mounted on each data processing device 990 which detects the information for each line, and allowing a maintenance worker of the data processing device 990 to view the display unit from outside.
  • LED light emitting diode
  • LCD liquid crystal display unit
  • a failure occurrence notification function which, for example, turns on a warning lamp or displays a character string showing the occurrence of a failure on the display unit when there is a difference between the two detection results as a result of the comparison of the detection results in the two lines, may be provided.
  • each data processing device can automatically detect the site of a failure and can show the site where a failure can be occurring. Thus, quick repair work can be carried out.
  • the data processing device 990 connected to the relay device 2 via the branch transmission line 99 detects the position and arrangement order of the own device in the train set.
  • the relay device 2 itself needs to detect the position (car number) and arrangement order of the own device.
  • a fourth port (port (4)) is provided in the data relay unit 3 and a relay processing control unit 5 is connected to the port (4) via an internal transmission line 995, as shown in FIG. 9 .
  • the relay processing control unit 5 has a function of setting a setting value that is necessary for initialization of and relay by the relay device 2 including the data relay unit 3, in the data relay unit 3 and the data distribution unit 4.
  • Such a function can be realized, for example, by using an MII interface installed in KS8995MA, which is switching device made by MICREL INC. (the configuration or the like described in the System Level Applications section of the corresponding data sheet).
  • the operation in this embodiment can be carried out by procedures similar to FIGS. 3 to 6 of the first and second embodiments, if the port (3) in the first and second embodiments is replaced with the port (4), the branch transmission line 99 is replaced with the internal transmission line 995, the data processing device 990 is replaced with the relay processing control unit 5, and a position confirmation packet including information designating a transmission direction to the main transmission line or the branch transmission line, for example, a destination IP address of a certain value (a different value from the values used in the first and second embodiments), is used.
  • each relay device 2 may be checked by making such an arrangement that the information of the position and arrangement order detected by the above procedures, for example, the values of P, Q, P+1, Q+1, P+Q+1 or the like in the first and second embodiments, can be displayed on a display unit such as a light emitting diode (LED) or liquid crystal display unit (LCD) mounted on each relay device 2 which detects the information, and allowing a maintenance worker of the relay device 2 to view the display unit from outside.
  • a display unit such as a light emitting diode (LED) or liquid crystal display unit (LCD) mounted on each relay device 2 which detects the information, and allowing a maintenance worker of the relay device 2 to view the display unit from outside.
  • LED light emitting diode
  • LCD liquid crystal display unit
  • each relay device 2 can autonomously detect the number of cars in the train set and the position (equivalent to the car number) of the own device.
  • each relay device 2 that is, the position of the own device within the train set, can be detected autonomously.
  • the data processing device 990 plural types of data processing device with different operations and functions may coexist, such as a data processing device which controls train traveling functions such as electric motor and brake, and a data processing device which controls other functions than the train traveling functions such as air conditioning and interior lights.
  • a data processing device which controls train traveling functions such as electric motor and brake
  • a data processing device which controls other functions than the train traveling functions such as air conditioning and interior lights.
  • Each of these plural types of data processing device needs to detect the position and arrangement order of the own device by type.
  • a position confirmation packet and a second position confirmation packet may be defined by type of data processing device 990, and the position confirmation packet and the second position confirmation packet may be transmitted and received between the data processing devices of the same type, using the technique described in the first to third embodiments.
  • a data processing device equivalent to an inverter device which controls an electric motor may use "239.0.0.1" as the destination IP address of a position confirmation packet for the inverter device
  • a data processing device equivalent to a brake control device which controls the brakes may use "239.0.0.3" as the destination IP address of a position confirmation packet for the brake control device.
  • all the relay devices 2 may be set to relay packets with the destination IP address "239.0.0.1" (with a destination MAC address "01-00-5E-00-00-01”) and the destination IP address "239.0.0.3" (with a destination MAC address "01-00-5E-00-00-03") to the ports (2) and (3).
  • the relay devices 2 may be set to relay packets with the destination IP addresses "239.0.0.1" and "239.0.0.3" to the ports (2) and (3) when the packets are received from the port (1), relay the packets only to the port (3) when the packets are received from the port (2), and relay the packets only to the port (2) when the packets are received from the port (3), so that each data processing device 990 can selectively receive a position confirmation packet having the destination IP address transmitted from the own device (the destination IP address corresponding to the type of the own device).
  • the data processing devices of various types can detect the arrangement order of the own device independently by type, using the procedures described in the first embodiment.
  • the data processing device equivalent to an inverter device which controls an electric motor may use "239.0. 0.2" as the destination IP address of a second position confirmation packet for the inverter device
  • the data processing device equivalent to a brake control device which controls the brakes may use "239.0.0.4" as the destination IP address of a second position confirmation packet for the brake control device.
  • All the relay devices 2 are set to relay packets with the destination IP address "239.0.0.2" (with a destination MAC address "01-00-5E-00-00-02") and the destination IP address "239.0.0.4" (with a destination MAC address "01-00-5E-00-00-04") to the ports (1) and (3).
  • the relay devices 2 may be set to relay packets with the destination IP addresses "239.0.0.2" and "239.0.0.4" only to the port (3) when the packets are received from the port (1), relay the packets to the ports (1) and (3) when the packets are received from the port (2), and relay the packets only to the port (1) when the packets are received from the port (3), so that each data processing device 990 can selectively receive a second position confirmation packet having the destination IP address transmitted from the own device.
  • the data processing devices of various types can detect the number of data processing devices of the same type as the own device and the position and arrangement order of the own device independently by type, using the procedures described in the second embodiment.
  • the data processing devices of various types can detect the number of data processing devices of each type and the arrangement order independently for each line and independently by type, using the procedures described in the third embodiment. Moreover, by comparing the results of detection between the lines, the site of failure can be detected.
  • plural data processing devices can detect the position and arrangement order of the data processing devices of each type, independently by type, in addition to the advantages of the first to third embodiments.
  • the respective cars are connected and a wired transmission line is assumed as the main transmission line 9 connecting the relay devices 2 next to each other.
  • a mixed configuration using a wireless transmission line and a wired transmission line can be used for the main transmission line 9, as shown in FIG. 10 .
  • a car A 11, a car group B 12 and a car C 13 form one train set.
  • the car A 11 and the car C 13 are made up of a single car each.
  • the car group B 12 is made up of plural cars connected to each other.
  • the main transmission line 9 between the car A 11 and the car group B 12 is formed by a wireless transmission line.
  • the main transmission line 9 between the plural cars 1 belonging to the car group B is formed by a wired transmission line.
  • the main transmission line 9 between the car group B 12 and the car C 13 is formed by a wireless transmission line.
  • a wireless device 93 and an antenna device 930 are connected to the relay device 2, as shown in FIG. 10 .
  • Data outputted from the relay device 2 is converted into a wireless signal by the wireless device 93 and transmitted to the wireless transmission line from the antenna device 930.
  • the wireless signal received by the antenna device 930 from the wireless transmission line is converted by the wireless device 93 into data to be inputted to the relay device 2, and the data is inputted to the relay device 2.
  • the antenna device 930 has a property of transmitting and receiving wireless radio waves only in a predetermined direction and may include a single antenna or an array of plural antennas.
  • the wireless system used for the wireless transmission line is not particularly limited. Wireless LANs conforming to the IEEE 802.11, IEEE 802.15, IEEE 802.16 standards and the like may be used, or wireless systems used for mobile phones or the like may be used. Also, wireless systems assumed to be used in railways and automobiles or the like such as train radio and DSRC may be used.
  • the antenna device 930 directly receives wireless signals not only from the next car but also from a distant car beyond the next car, and the data processing device may make an error in detecting the arrangement order or the like.
  • the car group B 12 and the car A 11 exist in a forward direction as viewed from the car C 13. Therefore, as a signal transmitted from the car A 11, two signals, that is, a signal relayed by the car group B 12 and a signal arriving directly from the car A 11, may be received in the car C 13.
  • each data processing device 990 in the car C 13 duplicately counts the data from the car A 11 and therefore the main transmission line 9 installed in the car A 11 makes an error in detecting the arrangement order.
  • each data processing device transmits a different signal from each other as a position confirmation packet.
  • the wireless device 93 in each car outputs only the packet that is received first to the relay device 2 and disposes of the packet that is received later, or outputs only the packet with the highest receiving radio intensity (the packet that is transmitted from the nearest car) to the relay device 2 and disposes of the other packets, or the like.
  • the sixth embodiment of the invention by replacing the main transmission line 9 with a wireless transmission line, there is no need to connect or disconnect of the transmission line every time coupling of or splitting into plural cars is carried out, which is necessary in the case of the wired transmission line. Also, cars or car groups connected via the wireless transmission line need not physically be connected and similar effects can be achieved even when these cars or car groups travel in a physically distant state. Therefore, even when the arrangement order is changed during the traveling, the arrangement order can be detected again each time and the new configuration can be grasped.
  • the invention can be applied not only to railway cars but also to moving bodies such as automobiles and buses traveling in a row in the same direction without having plural cars connected to each other, and ships and airplanes.
  • a display device 8 can be connected at one or plural positions in the main transmission line 9, as shown in FIG. 12 , and the display device 8 can detect and display the position and number of data processing devices 990.
  • the display device 8 receives the position confirmation packet and the second position confirmation packet as shown in FIGS. 4 and 6 , and detects the values "P" and "Q" described in the first or second embodiment. Thus, the position and number of data processing devices is displayed on the display device 8.
  • the position and number of data processing devices can be displayed on the display device 8 by type of data processing device, using the technique described in the fifth embodiment.
  • An example of configuration of the display device 8 includes: an arithmetic device 2800 equipped with a CPU which detects the number of position confirmation packets and second position confirmation packets, a cache memory, a main storage memory and the like; a storage device 2803 such as a hard disk, silicon disk or non-volatile memory which stores transmission and reception data, a processing program, initial setting information, log information and the like; a transmission line interface device 2801 having a function of receiving the position confirmation packet and the second position confirmation packet from the main transmission line 9 and the branch transmission line 99; and an output device 2805 such as a light emitting diode (LED) or liquid crystal display unit (LCD) which displays the detection result, as shown in FIG. 13 .
  • the display device 8 may also be provided with an input device 2804 such as a switch or keyboard to input initial setting items like an address and the operation mode of the transmission line, if necessary.
  • the display device 8 may also be connected to the branch transmission line 99 similarly to the other data processing devices 990, as shown in FIG. 14 . However, when the display device 8 is connected to the branch transmission line 99, the data distribution unit 4 in the relay device 2 needs to relay the position confirmation packet and the second position confirmation packet transmitted from the connected data processing device 990, to both the data relay unit 3 and the display device 8.
  • the position and number of data processing devices 990 can be confirmed using the display device 8. If the display device 8 is installed on the cab or in the passenger rooms of cars, confirmation of connection by the data processing devices can be easily carried out even when there is a change in the train set due to coupling or splitting of cars.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Small-Scale Networks (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
EP20120191372 2011-11-09 2012-11-06 Information transmission device and information transmission method Withdrawn EP2591974A2 (en)

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US10017195B2 (en) 2014-01-27 2018-07-10 Mitsubishi Electric Corporation Communication device, train network system, and network setting method
US10377399B2 (en) 2015-04-20 2019-08-13 Mitsubishi Electric Corporation Train data transmission system and train data transmission program
JP2021145250A (ja) * 2020-03-12 2021-09-24 オムロン株式会社 通信装置、および、情報処理プログラム
EP4026721A4 (en) * 2019-09-06 2023-09-27 Hitachi, Ltd. VEHICLE INFORMATION CONTROL SYSTEM

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JP6163049B2 (ja) * 2013-08-22 2017-07-12 コイト電工株式会社 鉄道車両の併結・分割に対応する照明制御システム
JP6245894B2 (ja) * 2013-08-22 2017-12-13 コイト電工株式会社 照明制御システム
JP6091385B2 (ja) * 2013-09-10 2017-03-08 三菱電機株式会社 列車無線システム
CN106331708A (zh) * 2016-08-22 2017-01-11 北京文安智能技术股份有限公司 一种视频流处理方法、装置及系统
JP6760185B2 (ja) * 2017-03-31 2020-09-23 住友電気工業株式会社 中継装置、検知方法および検知プログラム
JP7181767B2 (ja) * 2018-11-09 2022-12-01 株式会社日立製作所 列車データ記録装置および列車データ記録方法
JP7255810B2 (ja) * 2020-10-27 2023-04-11 九州旅客鉄道株式会社 情報処理装置、情報処理方法、及びプログラム

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
US10017195B2 (en) 2014-01-27 2018-07-10 Mitsubishi Electric Corporation Communication device, train network system, and network setting method
US10377399B2 (en) 2015-04-20 2019-08-13 Mitsubishi Electric Corporation Train data transmission system and train data transmission program
EP4026721A4 (en) * 2019-09-06 2023-09-27 Hitachi, Ltd. VEHICLE INFORMATION CONTROL SYSTEM
JP2021145250A (ja) * 2020-03-12 2021-09-24 オムロン株式会社 通信装置、および、情報処理プログラム

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