JP2005056513A - Apparatus for protecting magnetic disk loaded on railway vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To protect data of an operating magnetic disk drive loaded on a railway vehicle even when power failure occurs due to a drop of a pantograph, or the like. <P>SOLUTION: An apparatus for protecting a magnetic disk loaded on a railway vehicle includes a battery 11 for supplying DC power to a magnetic disk-loaded device 4 in the rolling stock in such a way that electric power supplied from the pantograph 1 is converted to AC power by an auxiliary power source 7 and this AC power is converted to DC power by a rectifier 8 for charging the battery 11. When power failure occurs in this apparatus, a trolley voltage detector 3 detects non-existence of a trolley voltage and notifies a magnetic disk control part 5 of it. Then a termination process of the magnetic disk 6 is immediately performed and the operation of the magnetic disk 6 is stopped during the process of the backup of the battery 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a railway vehicle-mounted magnetic disk protection device, and more particularly to a data protection device mounted in an electric railway vehicle when a magnetic disk device is powered off.

  Data protection in the event of a sudden power failure during operation of a magnetic disk device has been conventionally performed (see, for example, Patent Document 1). However, the conventional magnetic disk device is premised on the use of a stable commercial power supply, and the assumed power outage is a single occurrence. Therefore, it has been considered that the data on the magnetic disk may be damaged in situations where power outages that occur during the operation of the magnetic disk device are repeated on a daily basis.

Japanese Patent Laid-Open No. 2-154359

  In an electric railway, the power supply of an apparatus installed in a vehicle is often turned on or off by raising or lowering a power feeding means composed of a pantograph. The time when the pantograph ascends and descends cannot be determined from the side of the device installed in the vehicle, so that a sudden power failure occurs when viewed from each device in the vehicle. Since the pantograph descends on a daily basis, such as when entering a warehouse, sudden power outages will occur on a daily basis from the perspective of each device in the vehicle.

  An object of the present invention is to protect data of a magnetic disk device in operation at the time of a power failure in a power supply environment peculiar to a railway vehicle in which a sudden power failure occurs as viewed from the equipment side.

  In the railway vehicle mounted magnetic disk protection device according to the present invention, a magnetic disk device to which electric power is supplied from an overhead line via a power supply means, and a battery for supplying electric power to the magnetic disk device when power supply from the overhead line is stopped. Detecting means for detecting the stop of the power supply from the overhead wire, and terminating the magnetic disk device in response to the detection of the stop of the power supply by the detecting means.

  According to the present invention, in a power supply environment peculiar to a railway vehicle in which sudden power outages occur daily as viewed from the equipment side, it is possible to accurately protect the data of the magnetic disk device in operation at the time of the power outage.

Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration in the first embodiment.

  In FIG. 1, power is supplied to the magnetic disk mounting device 4 from an overhead line (not shown) via the pantograph 1. The overhead power from the pantograph 1 is supplied to the auxiliary power supply device 7, and the output of the auxiliary power supply device 7 is supplied to the magnetic disk mounting device 4 via the AC power supply line 8, the rectifier 9 and the DC power supply line 10. The magnetic disk mounting device 4 includes a magnetic disk control unit 5 and a magnetic disk 6 inside. The output of the auxiliary power supply 7 is fed to the battery 11 via the AC power supply line 8, the rectifier 9, the DC power supply line 10, and the battery switch 12. The power of the battery 11 is supplied to the magnetic disk mounting device 4 when the power from the overhead line is stopped. The overhead line voltage from the pantograph 1 is applied to the overhead line voltage detection device 3 via the high-voltage power supply line 2.

  Next, the operation will be described. The electric power from the overhead line supplied from the pantograph 1 is supplied to the auxiliary power supply device 7 through the high-voltage power supply line 2. The AC power converted to the three-phase AC by the auxiliary power supply device 7 passes through the AC power supply line 8, is converted to DC by the rectifier 9, and is supplied to the magnetic disk mounting device 4. On the other hand, the DC power rectified by the rectifier 9 is also charged in the battery 11, and can be supplied to the magnetic disk mounting apparatus 4 for a short time even when an overhead power failure occurs.

  When the overhead line voltage is not supplied due to the overhead line power failure or the drop of the pantograph 1, the overhead line voltage detection device 3 detects the absence of the overhead line voltage and notifies the magnetic disk control unit 5. The magnetic disk control unit 5 causes the magnetic disk 6 to perform end processing, and immediately stops the operation of the magnetic disk 6. During the termination process of the magnetic disk 6, the power supplied to the magnetic disk mounting device 4 is held by the battery 11, and the termination process of the magnetic disk 6 is performed safely. After the completion processing of the magnetic disk 6 is completed, the battery switch 12 can be turned off by manual operation of the crew member, and the power in the vehicle can be turned off completely.

Note that the time from detection of no overhead wire voltage to completion of the termination process of the magnetic disk 6 is sufficiently shorter than the time from the drop of the pantograph 1 to the manual operation of turning off the battery switch 12.
Therefore, it is possible to safely stop the magnetic disk and protect the data on the magnetic disk when the power is cut off, after the pantograph is lowered and before the crew member manually turns off the battery switch 12.

  According to the first embodiment of the present invention, a magnetic disk device comprising a magnetic disk mounting device 4 to which power is supplied from an overhead wire (not shown) via a feeding means comprising a pantograph 1, and an overhead wire (see FIG. The power supplied from the power supply means consisting of the pantograph 1 is converted into AC power by the auxiliary power supply device 7, the AC power is converted to DC power by the rectifier 8 and charged, and an overhead wire (not shown) ) Including a battery 11 for supplying DC power to the magnetic disk mounting device 4 in the railway vehicle when the power supply from the railway vehicle is stopped is detected by the overhead wire voltage detection device 3 when a power failure occurs in the overhead wire voltage due to a drop in the pantograph 1 or the like. The means detects no overhead wire voltage, and the detection means comprising the overhead wire voltage detection device 3 notifies the control means comprising the magnetic disk control unit 5 that there is no overhead wire voltage. The control means comprising the magnetic disk control unit 5 notified of this causes the magnetic disk 6 of the magnetic disk mounting device 4 to perform the termination process, and before the crew member turns off the battery switch, the control means of the magnetic disk 6 in the magnetic disk mounting device 4 Since the termination process is completed, it is possible to accurately protect the data on the operating magnetic disk unit in the event of a power failure in a power supply environment unique to railway vehicles, where sudden power outages occur daily from the perspective of the equipment. it can.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a block diagram showing a configuration in the second embodiment. In the second embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configuration in the first embodiment described above, and exhibits the same operation. In the figure, the same reference numerals indicate the same or corresponding parts.

  In the first embodiment described above, the crew member manually turns off the battery switch 12 after the termination process of the magnetic disk 6, but the magnetic disk control unit 5 detects completion of the termination process of the magnetic disk 6 as shown in FIG. The magnetic disk control unit 5 issues a command to turn off the battery cut relay 13a and automatically turns off the contact 13b of the battery cut relay 13a, thereby reducing the burden on the crew.

  According to the second embodiment of the present invention, a magnetic disk device comprising a magnetic disk mounting device 4 to which power is supplied from an overhead wire (not shown) via a feeding means comprising a pantograph 1, and an overhead wire (FIG. The power supplied from the power supply means consisting of the pantograph 1 is converted into AC power by the auxiliary power supply device 7, the AC power is converted to DC power by the rectifier 8 and charged, and an overhead wire (not shown) ) Including a battery 11 for supplying DC power to the magnetic disk mounting device 4 in the railway vehicle when the power supply from the railway vehicle is stopped is detected by the overhead wire voltage detection device 3 when a power failure occurs in the overhead wire voltage due to a drop in the pantograph 1 or the like. The means detects no overhead wire voltage, and the detection means comprising the overhead wire voltage detection device 3 notifies the control means comprising the magnetic disk control unit 5 that there is no overhead wire voltage. The control means comprising the magnetic disk control unit 5 notified of this causes the magnetic disk 6 of the magnetic disk mounting device 4 to perform the termination process, and before the crew member turns off the battery switch, the control means of the magnetic disk 6 in the magnetic disk mounting device 4 The control means comprising the magnetic disk control section 5 detects that the completion processing of the magnetic disk 6 in the magnetic disk mounting apparatus 4 has been completed, and the control means comprising the magnetic disk control section 5 The power supply environment peculiar to railway vehicles in which sudden power outages occur routinely when viewed from the equipment side because the DC power supply is automatically cut off by operating the shut-off means comprising the relay coil 13a and the contact 13b. The data of the operating magnetic disk unit can be protected accurately in the event of a power failure and the crew Can be obtained railway vehicle mounted magnetic disk protection device can reduce the work load.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram illustrating a railway vehicle mounted magnetic disk protection device according to a first embodiment of the present invention. It is a block diagram which shows the railway vehicle mounting magnetic disk protection apparatus in Embodiment 2 by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pantograph, 2 High voltage power supply line 3 Overhead voltage detection apparatus, 4 Magnetic disk mounting apparatus, 5 Magnetic disk control part, 6 Magnetic disk, 7 Auxiliary power supply apparatus, 8 AC power supply line, 9 Rectifier, 10 DC power supply line, 11 Battery, 12 Battery switch 13a Coil of battery cut relay, 13b Contact of battery cut relay.

Claims (2)

  A magnetic disk device to which power is supplied from an overhead line via a power supply means, a battery for supplying power to the magnetic disk device when power supply from the overhead line is stopped, and detection for detecting stoppage of power supply from the overhead line And a control means for performing a termination process of the magnetic disk device in response to detection of stoppage of power supply by the detection means. A magnetic disk device to which power is supplied from an overhead line via a power supply means, a battery for supplying power to the magnetic disk device when power supply from the overhead line is stopped, and detection for detecting stoppage of power supply from the overhead line And a control means for performing termination processing of the magnetic disk device in response to detection of power supply stoppage by the detection means, and by the battery in response to completion of termination processing of the magnetic disk device by the control means. A railway vehicle-mounted magnetic disk protection device, comprising: a shut-off means for cutting off power supply to the magnetic disk device.

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