JP4626928B2 - Train signal supply system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a train signal supply system that supplies train signals, and more particularly, to a train signal supply system that can supply train signals from a single signal supply unit to a plurality of track sections.
[0002]
[Prior art]
In a conventional automatic train control system (ATC system), a signal supply unit is provided for each track section (blocking section) obtained by dividing a track of a predetermined section into a plurality of signals, and signals indicating the train regulation speed are respectively transmitted from the signal supply unit. Supplied to the track of the corresponding track section.
[0003]
The train is provided with a power receiver that receives the signal opposite to the track, and the train outputs a regulated speed by display or voice based on the received signal, or an alarm when the speed is exceeded. An output is performed, or a train brake or a motor is controlled.
[0004]
Normally, a plurality of signal supply units are provided for each track section, and a signal is supplied from another signal supply unit even when one of the signal supply units fails. That is, the number of signal supply units for one predetermined section is more than twice the number of orbit sections.
[0005]
Moreover, since the braking distance of a train becomes long, so that a train speed is high, in this system, the maximum speed of a train is prescribed | regulated according to the distance with a preceding train. For example, when the preceding train is on the track section one or two ahead, the restriction speed = 0, when it is three places ahead, the restriction speed = 45 km / h, and when there is four places ahead In this case, the regulation speed is set to 75 km / h. In order to operate a train at high speed (for example, regulated speed = 75 km / h) in a section where such speed regulation is performed, a plurality of empty track sections (that is, track sections where no train exists) between cascade trains ( In the above example, three or more) must be present. That is, from the viewpoint of ensuring safety and high-speed operation, the train operation diagram is formulated so that a plurality of empty track sections exist between cascaded trains.
[0006]
[Problems to be solved by the invention]
In the conventional automatic train control system, the number of signal supply units is more than twice the number of track sections in a predetermined section, whereas the empty track section is set, so as shown in the diagram. The number of simultaneous operation of the signal supply unit during normal operation is less than the number of track sections, and the operation rate of the signal supply unit (the number of supply units that actually supply signals / the total number of supply units) is low. It was. Accordingly, in the conventional automatic train control system, labor and cost for installation and maintenance of the system are increased, and wasteful energy consumption is increased.
[0007]
In order to solve such problems, the applicant of the present invention has already proposed the invention described in Japanese Patent Application No. 2000-365684. The train signal supply system according to the proposed invention includes a signal supply unit that supplies a train signal to a track section obtained by dividing a track of a predetermined section into a plurality of tracks, and any one of the signal supply unit and the plurality of track sections. And a connection switching unit that selectively connects and switches the track sections to which signals are supplied. With such a configuration, signals can be supplied from a single signal supply unit to a plurality of track sections, eliminating the need to install a signal supply unit for each track section and improving the operating rate of the signal supply section. can do.
[0008]
By the way, in this system, whether or not a signal can be supplied is determined for each signal supply unit. In the case where the signal is not normally supplied to the track section, in addition to the case where the signal supply section itself is abnormal, the signal supply section is normal, but the connection switching section between the signal supply section and the track section is In some cases, an abnormality has occurred in the signal supply line. Here, even in the latter case, if a system that determines whether or not to supply signals in units of signal supply units and prohibits all signal supply from the signal supply units, signals are supplied from the signal supply units. A signal can be supplied only from another signal supply unit even in a possible track section, and accordingly, it is necessary to prepare an extra signal supply unit.
[0009]
[Means for Solving the Problems]
The train signal supply system according to the present invention selectively connects a signal supply unit capable of supplying a train signal toward a plurality of track sections, and the signal supply unit and any of the plurality of track sections. A connection switching unit, a detection unit for detecting a signal supply state for each signal supply line between the signal supply unit and each track section, and a threshold value set for each signal supply line by a detection result by the detection unit; And a diagnosis unit that determines whether the signal supply state is good or not, and the connection switching unit, when the selected signal supply line is diagnosed as a signal supply failure by the diagnosis unit, Select the signal supply line and connect it to the track section.
[0010]
According to such a configuration, since it is possible to determine whether or not a signal can be supplied in units of signal supply lines, the signal supply unit can be used more efficiently. That is, the signal supply unit can supply a signal via another normal signal supply line even when the signal cannot be supplied via one signal supply line.
[0011]
In the present invention, the signal supply unit includes a plurality of signal supply units. Further, based on the detection result, the diagnosis result of the signal output of each signal supply unit is referred to, and the signal is output from the signal supply units capable of normal signal output. Select a signal supply unit that supplies signals, or select a signal supply unit that supplies signals based on the order of use of the signal supply units, and further select the signal supply unit and the signal supply unit. Refer to the diagnosis result of the signal supply line between the track section of the signal supply destination, select the signal supply unit when the signal can be supplied, and select another signal when the signal cannot be supplied. It is preferable to include a selection unit that selects the supply unit. According to such a configuration, a signal can be supplied from a more appropriate signal supply unit according to the state of the signal supply line.
[0012]
In the present invention, it is preferable that the detection unit detects a supply state of a signal supplied from the signal supply unit via the connection switching unit. According to such a configuration, it is possible to detect an abnormality in the signal supply line including an abnormality in the connection switching unit.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which a train signal supply system according to the present invention is configured as an ATC system will be described with reference to the drawings. First, the configuration of the train signal supply system will be described with reference to FIGS. 1 and 2. FIG. 1 is a diagram showing an example of track segmentation and train arrangement, and FIG. 2 is a schematic configuration diagram of a train signal supply system.
[0014]
As shown in FIG. 1, the track 10 is divided into predetermined sections (jurisdiction sections). Each jurisdiction section is further divided into a plurality of track sections (for example, closed sections; 1T to 10T), and a signal for the train 12 is supplied for each track section (1T to 10T). In this system, the signal supply unit 24 is not provided for each track section (1T to 10T), but a plurality of signal supply units 24 are provided for the jurisdiction section, and the signal supply unit selected from them is selected (in the example of FIG. 1). 24d, 24c, 24b) are selectively connected to the track sections (1T, 5T, 7T) in which the train 12 exists, and supply signals for the trains, respectively.
[0015]
As shown in FIG. 2, the train signal supply system 20 includes a control unit 22 (= signal supply device) for each jurisdiction section. The control unit 22 includes a plurality of signal supply units 24 that generate and supply signals for the train 12 within the jurisdiction section (for example, a signal for controlling the operation of the train, a signal for indicating the regulated speed of the train, etc.). . The presence or absence of the train 12 in the track section (1T to 10T) is detected by, for example, a known train detection device (TD; not shown), and the control unit 22 operates based on the detection result. The plurality of control units 22 and TD are connected by a communication line such as a LAN (not shown), and the control unit 22 also receives information (for example, train signals, trains by TD) from the control units 22 or TDs in other jurisdictions. Detection results).
[0016]
The control unit 22 includes a plurality of signal supply units 24 (24a to 24e), a control unit 26 that controls each part of the control unit 22 and determines allocation of orbital sections (1T to 10T) to the signal supply unit 24, such as a CPU. A storage unit 28 (for example, RAM, ROM, hard disk or the like) that stores various parameters used in the processing of the control unit 26, a signal supply unit 24 and a plurality of orbital sections (1T to 10T) according to the assignment. A connection switching unit 30 that selectively connects any one of them and switches a track section (1T to 10T) to which a signal is supplied.
[0017]
Each signal supply unit 24 is connected in parallel to all track sections (1T to 10T) in the jurisdiction section by a signal supply line 32. Each signal supply line 32 is provided with a first opening / closing switch (for example, a MOS-FET) 30a. When the opening / closing switch 30a is closed, the signal supply unit 24 and the track section (1T to 10T) are connected. The signal for the train 12 can be supplied. That is, in the present embodiment, the connection switching unit 30 is configured by the plurality of first opening / closing switches 30a. The controller 26 determines the orbital sections (1T, 5T, and 7T in the example of FIG. 1) that require signal supply from the orbital sections (1T to 10T), and further supplies a signal to each of them. 24d, 24c, and 24b) are determined. This decision will be described in detail later. And the control part 26 controls the connection switching part 30, ie, the 1st opening / closing switch 30a, so that a signal may be supplied as determined.
[0018]
Each of the signal supply lines 32 is provided with a detection unit 34 that detects a signal supply state. The detection unit 34 includes, for example, a current transformer, and detects a current value flowing through the signal supply line 32. The detection unit 34 is provided between the first opening / closing switch 30a of the connection switching unit 30 and the track section (1T to 10T), and detects a supply state of a signal supplied via the first opening / closing switch 30a. Can do. Thereby, the abnormality of the supply state by the opening / closing failure of the first opening / closing switch 30a can be detected.
[0019]
The detection result by the detection unit 34 is input to the diagnosis unit 36, where the quality of the signal supply state is determined. The diagnosis unit 36 compares the threshold value (for example, current value) set for each signal supply line 32 with the detection result, and determines pass / fail. The diagnosis unit 36 acquires an opening / closing control signal input to the first opening / closing switch 30a from the control unit 26, and the signal supply state in both the open state and the closed state of the signal supply line 32 (first opening / closing switch 30a). Good or bad can be determined. The diagnosis result is stored in the storage unit 28. The diagnosis unit 36 may be provided in the CPU (control unit 26).
[0020]
The detection by the detection unit 34 and the diagnosis by the diagnosis unit 36 may be performed on a signal that is actually supplied toward the train 12, or in a track section where the train 12 does not exist (in the example of FIG. You may perform with respect to the signal for a test | inspection supplied toward 4T, 8T, 9T). The inspection signal is preferably the same signal as the actual train 12 signal.
[0021]
In each signal supply line 32, the signal supply line 32 is opened and closed between the detection unit 34 and the orbital section (1T to 10T) based on the diagnosis result of the diagnosis unit 36 (or the detection result of the detection unit 34). A second opening / closing switch (for example, mechanical relay) 38 is provided. The second open / close switch 38 is closed in a normal state (that is, a state in which the signal supply state is diagnosed as normal by the diagnosis unit 36), but the signal supply provided with the second open / close switch 38 by the diagnosis unit 36. It is opened when the signal supply state of the line 32 is diagnosed as defective. The opening / closing control of the second opening / closing switch 38 may be performed by the control unit 26 or may be performed by the diagnosis unit 36. The opening / closing of the second opening / closing switch 38 may be performed independently for each signal supply line 32, or performed in conjunction with each of the plurality of second opening / closing switches 38 connected to the same signal supply unit 24. Also good.
[0022]
Next, determination of the association between the track sections (1T to 10T) and the signal supply unit 24 in the train signal supply system 20 according to the present embodiment will be described. In addition, the following association determination is performed when some state change occurs (for example, when a new train 12 enters the jurisdiction section, or when a track section (1T to 10T) in which the train 12 exists is changed, For example, when the supply state of the signal supply line 32 changes, or when the output state of the signal supply unit 24 changes), or at a predetermined timing (for example, a predetermined time interval). .
[0023]
Based on the detection result of the train 12 by TD, the control unit 26 determines the track section (1T, 5T, 7T in the example of FIG. 1) in which the signal is supplied. First, the track sections where the train 12 exists (same as 1T, 5T, 6T, 7T, and 10T) are candidates for signal supply, and the track sections where the train 12 continues (same as 6T and 7T, 10T and 11T). When the signal is detected across the track, only the orbital section (7T) on the front side in the traveling direction is determined as the signal supply destination.
[0024]
Next, the control unit 26 determines from which signal supply unit (24a to 24e) the signal is supplied to the track section (1T, 5T, and 7T in the example of FIG. 1) in which the signal is supplied. This step corresponds to a step of selecting a signal supply unit 24 that supplies a signal from a plurality of signal supply units 24 in the control unit 22. The control unit 26 selects the signal supply unit 24 based on the following conditions 1) to 3).
[0025]
1) Whether or not the signal supply unit 24 can output a signal: Whether or not each signal supply unit 24 can output a signal is diagnosed at a predetermined timing (for example, a predetermined time interval), and the result is stored in the storage unit 28. The control unit 26 refers to the diagnosis result and selects the signal supply unit 24 from the signal supply units 24 capable of normal signal output. Note that factors for determining whether or not signal output is possible include, for example, whether the output voltage of the signal supply unit 24 is within a predetermined voltage range, or whether modulation (for example, frequency modulation) is performed correctly.
[0026]
2) Order of use of the signal supply unit 24: The plurality of signal supply units 24 are used as much as possible in order to suppress the occurrence of problems or delays in the detection of problems due to the prolonged non-use state, and the number of times used or the time used. It is desirable to make uniform all the signal supply units 24. Therefore, the use order of the signal supply unit 24 is stored in the storage unit 28, and the control unit 26 selects the signal supply unit 24 based on this use order. For example, the use order is set as rotation (24a → 24b → 24c → 24d → 24e → 24a → 24b →...). In addition, for a track section (in this case, 5T, 7T) other than the track section (1T in the example of FIG. 1) serving as the entrance of the jurisdiction section, the train 12 has a track section in front of it (same 4T, 6T). In general, the signal supply unit 24 that has supplied a signal to the track section (4T, 6T) is selected.
[0027]
3) Availability of use of signal supply line 32: The control unit 26 selects the signal supply unit 24 based on a diagnosis result by the diagnosis unit 36 (or a detection result by the detection unit 34) for each signal supply line 32. For example, the control unit 26, with respect to the signal supply unit 24 selected as a selection candidate from the above conditions 1) and 2), the signal supply unit 24 and the orbital section of the signal supply destination (in the example of FIG. 1, 1T, 5T, 7T), the signal supply unit 32 is selected when the signal supply state is in a state in which the signal can be supplied. The signal supply unit 24 is selected. At that time, another signal supply unit 24 may be selected again based on the conditions 1) and 2).
[0028]
An example thereof will be described with reference to FIG. 3. When the train 12 newly enters the track section 1T, the control unit 26 selects the signal supply unit 24d as the first candidate according to the above conditions 1) and 2). However, it is assumed that the signal supply line 32 between the signal supply unit 24d and the track section 1T has been diagnosed as being unable to supply a signal because a failure has occurred in the first open / close switch 30a. The two open / close switch 38 is open). For this reason, the control unit 26 uses the signal supply unit 24d other than the signal supply unit 24d according to the above conditions 1) and 2) in the order of use after the signal supply unit 24d and the signal between the track section 1T. Instead, the normal signal supply unit 24e of the supply line 32 is selected (FIG. 3A). At this time, the control unit 26 stores in the storage unit 28 that the signal supply unit 24d cannot be selected due to an abnormality in the signal supply line 32. When the train 12 travels and enters the next track section 2T, the control unit 26 is not the signal supply unit 24e actually used in the previous track section 1T but the first candidate to be used in the track section 1T. The signal supply unit 24d is selected. That is, when there is a signal supply unit 24d that cannot be selected due to an abnormality in the signal supply line 32 in the track section 1T before the track section 2T, the control unit 26 supplies a signal to the track section 2T. 24, the signal supply unit 24d that could not be selected is selected (FIG. 3B). In the present embodiment, whether the signal supply is good or not is determined for each signal supply line 32. Therefore, when a signal supply failure occurs in the signal supply line 32 (or the first opening / closing switch 30a provided in the signal supply line 32). The signal supply line 32 is controlled so as not to be used, but the signal supply unit 24 connected to the signal supply line 32 in which the malfunction has occurred is connected to the signal supply line 32 via another normal signal supply line 32. Supply can be made.
[0029]
In this way, the control unit 26 determines signal supply units (24d, 24c, 24b) that supply signals to the track sections (1T, 5T, 7T in the example of FIG. 1), and according to the correspondence. The connection switching unit 30 (opening / closing of the first opening / closing switch 30a) is controlled so that they are connected.
[0030]
【The invention's effect】
As described above, according to the present invention, in the signal supply system for trains that can supply signals from the signal supply unit to a plurality of track sections, the signal supply unit can be further effectively used.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of track segmentation and train arrangement to which a train signal supply system according to the present invention is applied.
FIG. 2 is a schematic configuration diagram of a train signal supply system according to the present invention.
FIG. 3 is a diagram illustrating an example of a connection between a signal supply unit and a track section in a train signal supply system according to the present invention.
[Explanation of symbols]
10 tracks, 12 trains, 20 train signal supply system, 22 control unit, 23 communication line, 24 (24a-24e) signal supply unit, 26 control unit, 28 storage unit, 30 connection switching unit, 30a first opening / closing switch, 32 signal supply line, 34 detection section, 36 diagnosis section, 38 second opening / closing switch, 1T to 10T orbital section.

Claims (3)

A signal supply unit capable of supplying signals for trains toward a plurality of track sections;
A connection switching unit for selectively connecting the signal supply unit and any of a plurality of track sections;
A detection unit for detecting a signal supply state for each signal supply line between the signal supply unit and each track section;
A detection unit that compares a detection result of the detection unit with a threshold value set for each signal supply line and determines whether the signal supply state is good or not, and
When the selected signal supply line is diagnosed as a signal supply failure by the diagnosis unit, the connection switching unit selects another normal signal supply line and connects it to the track section. Signal supply system. A plurality of the signal supply units are provided,
Further, based on the detection result, referring to the diagnosis result of the signal output of each signal supply unit, select a signal supply unit that supplies a signal from signal supply units capable of normal signal output, or A signal supply unit that supplies a signal based on the order of use of the signal supply unit is selected, and a signal supply line between the selected signal supply unit and the signal supply destination track section is further provided. And a selection unit that selects the signal supply unit when the signal can be supplied and selects another signal supply unit when the signal cannot be supplied. The train signal supply system according to claim 1.   The train signal supply system according to claim 1, wherein the detection unit detects a supply state of a signal supplied from the signal supply unit via the connection switching unit.

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