JP2006086704A - Extension system of inductive communication line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an extension system for an inductive communication line capable of extending the inductive communication line for a metallic circuit system in an inductive wireless communication system for double track railway vehicle at a low cost. <P>SOLUTION: The extension system of the inductive communication lines in the inductive wireless communication system utilizing electromagnetic induction between transmission antennas 5a, 5b and reception antennas 6a, 6b respectively provided to up and down line rolling stocks 1a, 1b of a double track railway and the inductive communication lines 8a, 8b extended along double tracks 4a, 4b, is characterized in that two inductive communication lines 20 are horizontally or vertically extended at a required height of a middle pole 11 installed in a midposition of the double tracks and the up and down line rolling stocks 1a, 1b of the double track railway share the two inductive communication lines 20 with each other. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for extending an induction communication line using a metal circuit method in a communication method using induction radio between a crew member of a railway vehicle of a double-track railway and a vehicle operation command room.

  For example, when performing communication by guided radio between a crew member of a railway vehicle and a vehicle operation command room in a conventional double-track railway such as a subway, a schematic diagram of a cross section of an underground tunnel in which the railway vehicle travels in FIG. As shown in the figure, two induction communication lines constituting a metal circuit system are extended along each outer wall of a vehicle track of a double track railway, and this is performed via the induction communication lines. That is, in FIG. 4, reference numerals 1a and 1b denote railway vehicles, which are constituted by vehicle bodies 2a and 2b and wheel assemblies 3a and 3b, respectively, on the up and down rails (tracks) 4a and 4b respectively laid for the subway. It shows the state of stopping or running.

  Reference numerals 5a and 5b denote transmission antennas, which are installed on the upper and lower side surfaces of the vehicle main body 2a and 2b on the upper and lower tracks, for example. Reference numerals 6a and 6b denote receiving antennas, which are installed at the lower portions of both side surfaces of the vehicle connecting portion, similarly to the transmitting antennas 5a and 5b. Reference numerals 7a and 7b denote underground tunnels on which the railway vehicles 1a and 1b travel. Two induction communication lines 8a and 8b constituting a metal circuit system are extended on both outer sides of the tunnels 7a and 7b.

The transmitting antennas 5a and 5b and the receiving antennas 6a and 6b are installed on both sides of the vehicle main bodies 2a and 2b because the inductive communication line is used regardless of whether the vehicle main bodies 2a and 2b travel on the upstream or downstream. This is so that the electromagnetic induction coupling with 8a and 8b is sufficiently performed.
Further, on both outer sides of the tunnels 7a and 7b, different cable ducts 9a and 9b for installing different cables such as a third rail (trolley wire), a communication cable, a signal cable, an illumination cable, an optical fiber cable, etc. Cable shelves 10a and 10b are provided. Reference numeral 11 denotes a middle pillar provided in an intermediate part of the ascending and descending trajectories of the tunnels 7a and 7b.

  FIG. 5 is a schematic system diagram in the case where report information or the like is transmitted from the vehicle 1a to, for example, a vehicle operation command room. In FIG. 5, 12 is a transmitter as train radio equipment provided in the vehicle 1a, 13 is an electromagnetic wave of a transmission signal transmitted from the transmission antenna 5a, and is coupled to the induction communication line 8a by electromagnetic induction. 14a. 14b is a line coupler connected to the inductive communication line 8a, 15 is a terminating resistor, and 16 is a base station, which is connected to the line couplers 14a and 14b. Reference numeral 17 denotes a vehicle operation command room connected to the base station 16. A receiver is mounted on the base station 16 (not shown), and a demodulated audio signal or the like is sent to the vehicle operation command room 17 for monitoring. A plurality of base stations 16, line couplers 14, and termination resistors 15 are installed as the induction communication line 8 is extended.

A transmission signal from the transmitter 12 of the vehicle 1a is transmitted as an electromagnetic wave 13 from the transmission antenna 5a, and is combined with the induction communication line 8a by electromagnetic induction to transmit report information and the like, and the line coupler 14 and the base station 16 are illustrated. It is demodulated by a receiver that is not connected and monitored in the vehicle operation command room 17.
As shown in FIG. 6, the electromagnetic wave 13 as a transmission signal transmitted from the transmission antenna 5a of the vehicle 1a is as follows. It is electromagnetically coupled to the inductive communication line 8a and transmitted.

FIG. 7 is a schematic system diagram when command information and the like are transmitted from the vehicle operation command room 17 to the vehicle 1a. The command information from the vehicle operation command room 17 is transmitted to the induction communication line 8a via the line coupler 14a as a transmission signal from a transmitter (not shown) installed in the base station 16. The electromagnetic wave 18 corresponding to the transmission signal transmitted from the induction communication line 8a is received by the reception antenna 6a by the electromagnetic induction coupling with the reception antenna 6a provided in the vehicle 1a, and the command information is received by the vehicle 1a. Received by the machine 19.
As shown in FIG. 8, the electromagnetic wave 18 transmitted from the inductive communication line 8a and the reception antenna 6a are coupled by electromagnetic induction. As shown in FIG. It is received by electromagnetic coupling (see, for example, Patent Document 1 or Patent Document 2).
JP 2003-174407 A JP 2003-81091 A

  The conventional metal circuit method as a method for extending the induction communication line is extended by reducing the interval between the two induction communication lines (about 200 to 500 mm) as compared with the ground return method and the wide two-wire method. This is an advantageous communication method that can be separated from adjacent sections. However, this conventional extension system is one in which two induction communication lines are extended as metal circuits on the outer side (outer wall, etc.) of each track of the double-track railway. Therefore, in the double-track section, the four-line induction communication line is required, and it is disadvantageous in terms of the restriction of the extension place of the induction communication line and the cost due to the construction competition with various kinds of different cables. The present invention has been made to solve these problems.

  The method of extending an induction communication line according to the present invention is an induction wireless communication based on electromagnetic induction between a transmission antenna and a reception antenna respectively provided on an ascending / descending vehicle of a double track railway and an induction communication line extended along a double track. In the extension system of the induction communication line in the system, two induction communication lines are extended to the required height of the middle pillar installed in the middle part of the double-track railway, and the This is characterized in that the inductive communication line is shared.

  By adopting the configuration described above, the present invention has been able to reduce the cost of expansion without being restricted by the expansion location of the induction communication line, even though it is a method of extending the induction communication line. is there.

  An embodiment of a method for extending an induction communication line according to the present invention will be described with reference to the schematic cross-sectional view of an underground tunnel in which a railway vehicle travels as shown in FIGS. 1 and 2, the same portions as those described in the conventional example are denoted by the same reference symbols. In this embodiment, the two induction communication lines 20 constituting the metal circuit system are installed substantially horizontally with the middle pillar 11 provided in the middle of the rails 4a and 4b of the double track. The height at which the two guide communication lines 20 are installed depends on the positional relationship between the transmission antennas 5a and 5b and the reception antennas 6a and 6b provided in the vehicle 1a or 1b. When the height of the center of the antennas 5a and 5b is 2600 mm with respect to the top surface of the rail 4, the installation height of the induction communication line 20 is preferably 2600 mm or less.

  Further, it is desirable that the interval between the two induction communication lines 20 is approximately 200 to 500 mm or more with the middle pillar 11 in between. The center height of the receiving antennas 6a and 6b is desirably set to 1300 mm or more with reference to the upper surface of the rail 4. Further, the distances from the center (orbit center) of the rails 4 of the transmitting antennas 5a and 5b and the receiving antennas 6a and 6b to the horizontal direction are about 1300 mm, respectively. In this case, the horizontal distance from the center of the rail 4 of the induction communication line 20 is The distance is about 1700 mm. That is, the horizontal distance between the transmitting antenna 5 and the receiving antenna 6 and the induction communication line 20 is about 400 mm. In the selection of the installation position of the two-line induction communication line 20 as described above, since the dissimilar cables are hardly provided on the side of the middle pillar 11, the extended position of the induction communication line 20 can be freely determined.

  In addition, the installation height of one (higher) induction communication line 8 of the two strips in the conventional example is normally at a position of about 2600 mm from the upper surface of the rail 4, and the installation height of the other (lower) induction communication line 8. The height is about 2100 mm. The distance in the horizontal direction from the center (orbit center) of the rail 4 of the induction communication line 8 is about 1750 to 1850 mm, and the horizontal distance between the transmission antenna 5 and the reception antenna 6 and the induction communication line 20 is 450. About 550 mm. Accordingly, the horizontal installation position of the induction communication line 20 of the present invention is provided at a position close to the transmitting antenna 5 by about 50 to 150 mm as compared with the conventional example.

In this embodiment, the state of electromagnetic coupling of the induction radio between the electromagnetic wave transmitted from the transmission antenna 5a and the induction communication line 20 is shorter than the conventional example as shown in FIG. Deepened and sufficient electromagnetic coupling was achieved.
In addition, as shown in FIG. 2, the electromagnetic coupling state between the electromagnetic wave transmitted from the induction communication line 20 and the receiving antenna 6a is longer in the vertical direction than in the conventional example and shorter in the horizontal direction. Therefore, although the sensitivity is slightly lowered, the electromagnetic wave transmitted from the induction communication line 20 can be reliably caught by the receiving antenna 6.

  FIG. 3 shows the transmission of the vehicle 1a when the guidance communication line is provided on each outer side (outer wall) of the double track as in the conventional example and when the guide communication line is provided along the middle pillar of the double track as in the present invention. The data which compared the reception level characteristic in the induction | guidance | derivation communication line 20 or 8 of the electromagnetic wave 13a sent out from the antenna 5a are shown as a graph figure. As shown in FIG. 3, with respect to the reception level from the transmission antenna 5a closer to the induction communication line 20 in the present invention is about 97 dB (solid line data), the transmission antenna closer to the conventional induction communication line 8 is used. The reception level from 5a is about 95 dB (dashed line data). Further, in the present invention, the reception level from the transmission antenna 5a far from the induction communication line 20 is about 67 dB, whereas the reception level from the transmission antenna 5a far from the induction communication line 8 of the conventional example is about 58 dB. .

  That is, the difference between the distance between the transmission antenna 5a and the induction communication line 20 in the present invention and the distance between the transmission antenna 5a and the induction communication line 8 in the conventional example is not so large as about 50 to 150 mm. As described above, the reception level from the transmission antenna 5a in the induction communication line 20 of the present invention and the reception level from the transmission antenna 5a in the induction communication line 8 of the conventional example have the reception levels of the present invention both near and far. high. Therefore, the difference between the reception levels of the synthesized electromagnetic waves transmitted from the near and far transmission antennas 5a is further increased, and the superiority of the reception level in the expansion method of the present invention is clear.

  1 and 2 according to the present invention described above, the two embodiments of the inductive communication line 20 are extended in parallel in the horizontal direction with the middle pillar 11 in between. However, as another embodiment, the two induction communication lines 20 may be extended in parallel in the vertical (vertical) direction with one side of the middle pillar 11 or the middle pillar 11 in between. Also in this case, it is necessary to extend the induction communication line 20 in consideration of the height of the transmission antenna 5 provided in the vehicle 1a.

  The method of extending an induction communication line according to the present invention can be applied to an induction radio type train communication system having a middle pillar between tracks of a double-track railway or capable of installing a middle pillar equivalent facility.

It is a schematic diagram which shows the transmission state from the cross section of one Example of the extending | stretching system of the induction | guidance | derivation communication line in the double track | orbit of this invention, and a train. It is a schematic diagram which shows the receiving state in the cross section of one Example of the extending | stretching system of the induction | guidance | derivation communication line in the double track | orbit of this invention, and a train. It is the graph which compared the reception level characteristic in the extending | stretching system of the induction | guidance | derivation communication line of one Example of this invention and a prior art example. It is a schematic diagram which shows the cross section of an example of the extending | stretching system of the induction | guidance | derivation communication line in the conventional double track. It is a typical systematic diagram in the case of transmitting report information etc. to a vehicle operation command room from a vehicle. It is a schematic diagram which shows the cross section of an example of the extending | stretching system of the induction | guidance | derivation communication line in the conventional double track, and the transmission state from a train. It is a typical system diagram in the case of transmitting command information and the like from the vehicle operation command room to the vehicle. It is a schematic diagram which shows the cross-section of an example of the extending | stretching system of the induction | guidance | derivation communication line in the conventional double track, and the receiving state of a train.

Explanation of symbols

1a, 1b Railroad vehicle 2a, 2b Vehicle body 3a, 3b Wheel assembly 4a, 4b Rail (track)
5a, 5b Transmitting antenna 6a, 6b Receiving antenna 7a, 7b Underground tunnel 8a, 8b, 20 Inductive communication line 9a, 9b Different cable duct 10a, 10b Different cable shelf 11 Middle pillar 12 Transmitter 13 Electromagnetic wave 14 from transmission antenna 14 Line coupling 15 Terminal resistor 16 Base station 17 Vehicle operation command room 18 Electromagnetic wave from induction communication line 19 Receiver

Claims (3)

In the extension method of the induction communication line in the induction wireless communication method by electromagnetic induction between the transmission antenna and the reception antenna respectively provided on the up and down vehicles of the double line type railway and the induction communication line extended along the double line type track,
The two-line induction communication line is extended to the required height of the middle pillar installed in the middle part of the double-track type track, and the two-line induction communication line is shared by the double-track railway ascending and descending vehicles. An inductive communication line extending method characterized by   2. The induction communication according to claim 1, wherein the two strips of the induction communication line extended to the middle pillar in the middle portion of the double track are extended in parallel at a predetermined interval in a substantially horizontal direction across the middle pillar. Line extension method.   2. The method of extending an induction communication line according to claim 1, wherein the two induction communication lines extended on the middle pillar in the middle portion of the double track are extended in parallel in the vertical (vertical) direction at a predetermined interval. .

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