JP2009017634A - Train data recording system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a train data recording system wherein lost information data on the state of equipment can be reduced, as much as possible, even when power supply is interrupted. <P>SOLUTION: A data recorder 2, provided in the driver's cab of a vehicle 1 or an intermediate vehicle, includes CPU 3 and a memory area 4. The memory area 4 includes a storage unit 5 and a storage unit 6; information on the states of multiple pieces of equipment monitored at predetermined time intervals is stored sequentially in the storage unit 5 as data files. Duplicate files of the data files, stored in the storage unit 5, are stored in the storage unit 6; data recorded in the data recorder 2 is periodically transferred to an external storage device 9; and in the external storage device 9, data is stored doubly, as in the data recorder 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a data recording system for recording train vehicle information.

  2. Description of the Related Art Conventionally, a train information management device that manages train vehicle information monitors state information of various devices provided in a vehicle and records the state information as a data file in a data recording device.

JP 2005-50073 A

  However, according to the above conventional technique, when data is written to the storage medium, for example, when the power supply of the vehicle is broken due to an accident, or when entering the vehicle base (garage) (for example, around 2 to 3 o'clock in the night) When the power is cut off, such as when the train stops operation, the data file being written may be destroyed and the data may be lost. Such disappearance of data greatly hinders the cause investigation when analyzing vehicle information at the time of a train accident or the like.

  The present invention has been made in view of the above, and an object of the present invention is to provide a train data recording system capable of minimizing the loss of equipment state information data even when a power interruption occurs. To do.

  In order to solve the above-described problems and achieve the object, a train data recording system according to the present invention includes a data recording device that records state information data of a plurality of devices mounted on a train, and the data recording device. An external storage device for storing the transferred recording data, wherein the data recording device stores the status information data of the plurality of devices monitored at a predetermined time interval sequentially as a data file. A storage unit and a second storage unit in which a duplicate file obtained by copying the data file is stored after the first data file is stored in the first storage unit.

  According to the present invention, when data is being written to one of the first and second storage units provided in the data recording device, a power interruption occurs and the data file being written is destroyed. However, since the data can be recovered from the other storage unit, it is possible to retain the data of the data file that has been written latest or one before, and to minimize the loss of data. , Has the effect. Furthermore, since the recording data recorded in the data recording device is transferred and stored in the external storage device, even if the data recording device is destroyed due to an accident, for example, the loss of the recording data can be prevented as much as possible. , Has the effect.

  Embodiments of a train data recording system according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a schematic diagram showing a configuration of a train data recording system according to the present embodiment. FIG. 1 shows a train-organized vehicle. For example, a data recording device 2 is provided in a cab (not shown) of the vehicle 1. The data recording device 2 includes a CPU 3 and a memory area 4. The memory area 4 includes two storage units, that is, a storage unit 5 as a first storage unit and a storage unit 6 as a second storage unit. The storage unit 5 and the storage unit 6 constitute an independent storage area. In addition, it is preferable that the storage units 5 and 6 have the same storable capacity, and it is assumed that all stored contents stored in one of the storage units can be stored in the other without any shortage. Such a data recording device 2 is provided in each of the leading vehicle (vehicle 1) and the trailing vehicle provided with the cab. In addition, although the data recording apparatus 2 was provided, for example in the cab, it is not limited to this structure, You may be provided in the intermediate vehicle.

  The data recording device 2 acquires the state information data from a plurality of devices provided in each vehicle, and records the acquired state information data as a data file, for example, a binary data file. In FIG. 1, a vehicle 1 is provided with, for example, n devices (n is an integer of 2 or more) devices c1, devices c2,. The devices c1 to cn and the data recording device 2 are connected by a transmission line capable of transferring data. In addition, status information data of devices provided in vehicles other than the vehicle 1 is transferred to the data recording device 2 via the inter-vehicle transmission line 20. The device state information data is data in which, for example, the current value from the motor, the brake pressure, the power running / braking device notch position, the open / closed state of each door, and the like are recorded in association with the time.

  The vehicle 1 is provided with an external storage device 9 that is a storage device installed outside the data recording device 2. The external storage device 9 is connected to the data recording device 2 via a transmission line capable of transferring data, and the data recorded in the data recording device 2 is transferred to and stored in the external storage device 9. The external storage device 9 can be provided not only in the leading vehicle but also in other vehicles such as an intermediate vehicle and a trailing vehicle. In this case, data can be transferred via the inter-vehicle transmission line 20. . Further, the vehicle 1 is provided with a battery 15 as a backup power source. The battery 15 can supply power to the data recording device 2 and the external storage device 9 when the main power supply is turned off.

  Next, the operation of this embodiment will be described. Status information data of a plurality of devices provided in each vehicle of the train is transmitted to the data recording device 2 periodically (for example, at intervals of 200 msec) via the inter-vehicle transmission line 20 or the like. That is, the status information data of a plurality of devices monitored at a predetermined time interval is sequentially input to the data recording device 2. The state information data input to the data recording device 2 is stored as a data file in the storage unit 5 by the CPU 3 as a control device inside the data recording device 2. Further, the CPU 3 duplicates the data file saved in the storage unit 5 and saves the duplicate file in the storage unit 6. Thus, in this embodiment, vehicle information is recorded twice in the data recording device 2.

  In the data recording device 2, when the power is cut off while writing the status information data in the storage unit 5, the data file being written is destroyed. However, since the data file before the latest update is stored in the storage unit 6, the data file up to the previous data file can be held. In addition, when the power supply is cut off while a duplicate file of the data file is written in the storage unit 6, the data file being written is destroyed. However, since the latest updated data file is held in the storage unit 5, it is possible to hold the data file acquired before the power is turned off. The power interruption is a state in which power is not supplied from the main power supply of the train due to, for example, a power failure or an accident, and the power of the battery 15 is exhausted or no power is supplied from the battery 15 due to an accident or the like.

  Since it is difficult to install a large-capacity memory area inside the data recording device 2 provided in the cab, the recorded content of the storage unit 5 or 6 is periodically (for example, at intervals of 5 minutes). The data is transferred to the external storage device 9 and saved. Thereafter, the contents of the storage units 5 and 6 are updated with newly acquired data. In the external storage device 9, the data files sent from the data recording device 2 are collectively stored in a predetermined unit (for example, a file capacity of 1 MB unit or a time unit (for one day)) as a data file group, and A copy of this data file group is also saved. That is, in the external storage device 9 as well, as in the memory area 4, data is written twice. For example, the data file group b1 is a duplicate of the data file group a1, and the data file groups a1 and b1 are composed of a plurality of data files recorded in the data storage device 2 during one day, for example. The data file group a1 and the data file group b1 are stored in mutually independent storage areas. Similarly, data files a2 and b2 are duplicates of the other, and from a plurality of data files recorded in the data storage device 2 during the day after the data file groups a1 and b1 are recorded. Become. The data file group a2 and the data file group b2 are stored in mutually independent storage areas. In the external storage device 9, N pairs (N is a positive integer) such as data file groups a1 and b1 are stored (that is, (a1, b1), (a2, b2),... (AN, bN)), indicating that these N pairs are also stored in mutually independent storage areas.

  The number of data files in one data file group can be set arbitrarily. For example, it is always possible to set N = 1, and the received data files are sequentially added to the data file group a1 and stored, and the data file group b1 that is a copy of these data files can be stored in the same manner. Further, the setting of the above-mentioned daily unit may be changed to a time unit or the like, and further, the unit to be stored can be one data file, and one data file can be sequentially stored in different storage areas.

  Next, the procedure for saving the state information data will be described. The state information data transferred from each device c1 to cn or other vehicles to the data recording device 2 every 200 msec, for example, is sequentially stored in the storage unit 5 in the memory area 4 until the storage unit 5 can store it. Store and save as a data file. Here, the storage capacity of the storage unit 5 is, for example, a capacity capable of storing state information data for 5 minutes. Subsequently, a duplicate file of the data file stored in the storage unit 5 is stored in the storage unit 6.

  Next, for example, data files accumulated for 5 minutes in the storage unit 5 or the storage unit 6 are transferred from the storage unit 5 or the storage unit 6 to the external storage device 9 every 5 minutes, and sequentially stored in predetermined units. For example, data files are collectively stored for each capacity (for example, 1 MB) or for each time (for example, one day). If the stored data file group is, for example, the data file group a1, then the data file group b1 that is a copy of the data file group a1 is stored in the external storage device 9. Then, such storage processing is sequentially repeated. The data file transfer interval from the storage unit 5 or the storage unit 6 to the external storage device 6 is set to 5 minutes corresponding to the storable capacity of the storage device 5, but the battery 15 is connected as described later. In the case of the power source, in order to transfer as many data files as possible to the external storage device 9 during the duration of the battery 15, it is possible to shorten the transfer interval (for example, change the 5-minute interval to a 1-minute interval). preferable.

  According to the present embodiment, when data is written to one of the storage devices 5 and 6, even if the power is cut off and the data file being written is destroyed, the other storage device Since the data can be recovered from the data file, it is possible to retain the data of the data file written the latest or one before, and to reduce the data loss as much as possible. Therefore, even if the main power of the train is cut off due to a power failure or an accident, the data recording device 2 can keep the data as new as possible without using a backup such as a battery. Further, as shown in FIG. 1, even if the battery 15 is mounted, the main power supply is cut off due to a vehicle accident or the like, and if the battery is taken out or the battery wire is cut off, the data recording device does not operate. Even in such a case, it is possible to keep the latest data as much as possible. Further, even during normal times other than accidents, for example, when the vehicle enters the garage, the power is turned off, so that the processing at this time can be handled without a special device.

  Further, since the recording data recorded by the data recording device 2 is transferred and stored in the external storage device 9, even if the recording data in the data recording device 2 is lost, it is already transferred to the external recording device 9. The recorded data can be held. Furthermore, since the external storage device 9 holds data twice, the same effect as described for the data recording device 2 can be obtained. By using the external storage device 9 as a small removable medium such as an IC card and storing data twice, even if the vehicle is destroyed due to an accident or the like, data loss can be prevented as much as possible. Note that it is preferable to reduce the unit of writing to the external storage device 9 as much as possible, that is, to reduce the number of data files belonging to the data file group, from the viewpoint of reducing data loss due to damage to the storage area. If it is stored in a very small unit, it will take time to manage it.

  Although the memory area 4 is composed of two storage units, the present invention is not limited to this, and a configuration including three or more storage units may also be used. At this time, as in the present embodiment, the content of data written in one storage unit is duplicated and written in another storage unit.

  Further, in a configuration in which a backup power source such as the battery 15 is mounted on the train, the main power source is monitored for power interruption, and the power source is changed to the battery 15 when the main power source is cut off. After the change, the interval for monitoring each device when recording the state information data of a plurality of devices as a data file is shortened, and the state information data held in one data file is information at a shorter time interval. It is preferable that That is, it is preferable to make the data size of one data file smaller after the main power supply is turned off. Thus, by recording in shorter time units, when the power of the battery 15 is exhausted during data writing and the data file being written is destroyed, the amount of state information data lost is reduced. can do. Further, the lost data can be reduced by shortening the interval at which the data file is transferred from the data recording device 2 to the external storage device 9.

  In Patent Document 1, a data recovery method capable of recovering file information even if the file information is damaged due to an interruption caused by an instantaneous interruption or the like during data writing to a recording device used in office automation or the like. And a data recovery device are disclosed. However, this is realized by restoring the root directory (including the file name and the recording position information of the first data in the recording device among a plurality of data constituting the file) used when creating a file in the recording device. Thus, as in the present embodiment, the data storage area is duplicated and the data file itself is duplicated, which is different from the data recovery.

Embodiment 2. FIG.
FIG. 2 is a schematic diagram showing a configuration of a train data recording system according to the present embodiment. In the first embodiment, the external storage device 9 is provided on the vehicle, but in the present embodiment, the external storage device 9 is provided on the ground 10.

  The data recording device 2 is connected to a transmission device 7 provided in the vehicle 1, and a data file stored in the data recording device 2 is transmitted to the outside of the train via the transmission device 7 (for example, wireless transmission). Is done. The ground 10 is provided with a receiving device 8, which receives the data file transmitted from the transmitting device 7, and the received data file is an external storage device 9 connected to the receiving device 8. Saved in. As described above, in the present embodiment, the recording data recorded in the data recording device 2 is transferred and stored in the external storage device 9 provided on the ground 10 via the transmission device 7 and the reception device 8. . Further, the vehicle 1 is provided with a battery 15 as a backup power source. The battery 15 can supply power to the data recording device 2 when the main power supply is turned off. The other configuration of the present embodiment is the same as the configuration of the first embodiment shown in FIG. 1. Therefore, in FIG. 2, the same components are denoted by the same reference numerals and detailed description thereof will be given. Is omitted.

  When the external storage device 9 is provided on the ground 10, for example, the state information data of each device at the time of the accident can be confirmed without going to the site, so that the accident analysis can be performed quickly. Other operations, effects, and the like of the present embodiment are the same as the operations, effects, and the like in the first embodiment.

  As described above, the train data recording system according to the present invention is suitable for recording driving conditions for analyzing vehicle information in the event of a train failure or accident.

It is a schematic diagram which shows the structure of the train data recording system concerning Embodiment 1 of this invention. It is a schematic diagram which shows the structure of the train data recording system concerning Embodiment 2 of this invention.

Explanation of symbols

1 vehicle 2 data recording device 3 CPU
4 Memory area 5, 6 Storage device 7 Transmission device 8 Reception device 9 External storage device 10 Ground 15 Battery c1, c2, cn Equipment a1, b1, a2, b2, aN, bN Data file group 20 Inter-vehicle transmission line

Claims (6)

A data recording device for recording status information data of a plurality of devices mounted on the train;
An external storage device for storing recording data transferred from the data recording device;
With
The data recording device comprises:
A first storage unit in which status information data of the plurality of devices monitored at a predetermined time interval are sequentially stored as a data file;
A second storage unit in which a duplicate file obtained by copying the data file is stored after the first data file is stored in the first storage unit;
A train data recording system comprising:   2. The train according to claim 1, wherein the external storage device stores the recording data transferred from the data recording device and the duplicated data, thereby storing the data in a duplicated manner. Data recording system.   When the main power supply of the train is cut off, the power supply source is switched to a backup power source mounted on the train, and the predetermined time interval for monitoring the plurality of devices after the power cut-off is from before the power cut-off. The train data recording system according to claim 1, wherein the train data recording system is also shortened.   4. The data file stored in the first or second storage unit in the data recording device is transferred to the external storage device at a predetermined unit and at a predetermined transfer interval. The train data recording system according to any one of the above.   When the main power supply of the train is cut off, the power supply source is switched to a backup power source mounted on the train, and the predetermined transfer interval is made shorter than before the power cut-off after the power is cut off. The train data recording system according to claim 4.   The train data recording system according to any one of claims 1 to 5, wherein the external storage device is provided on a vehicle.

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