JP4699628B2 - Inductive loop coil device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an induction loop coil device used for train control such as an ATC device (train control device) and a TD device (train position detection device) using an induction loop coil.
[0002]
[Prior art]
FIG. 3 is a cross-sectional view of a track R on which a train travels using a conventional induction loop coil device, and FIG. 4A is a schematic configuration diagram of the induction loop coil device.
[0003]
The train A is configured to be guided by a guide rail (guide rail) G1 and a guide rail G2 so as to travel on the track R, respectively. In FIG. 3, the guide rail G1 is shown for an up train (train), and the guide rail G2 is shown for a down train.
[0004]
Although not shown, the guide rails G1 and G2 are provided with a train line (conductor) for supplying a train current to the train A along the traveling direction of the train A, that is, a feeder. Further, the train A is provided with a slider (not shown) that slides on the train line. Therefore, each of the guide rails G1 and G2 can be regarded as a kind of conductor.
[0005]
In FIG. 3, L ′ is an induction loop coil (hereinafter referred to as “loop”), and is laid along the traveling direction of train A as shown in FIG. And this loop L 'is twisted and installed so that it may cross | intersect in the ratio which the induced feeding noise cancels. The loop L ′ is supplied with a predetermined train control signal (hereinafter described as an ATC signal) such as an ATC signal (train control information) transmitted from the signal generator S to the vehicle (train A). (Refer to the arrow of the loop L ′ in FIG. 4A.)
[0006]
Train A is provided with an on-board device 10 for performing predetermined train control such as speed control and brake control based on an ATC signal received from the ground side. That is, the on-board device 10 is provided with an on-board antenna (on-vehicle element) A facing a loop L ′ laid on the ground side, and the ATC is connected to the ATC from the loop L ′ via the on-board antenna A. A signal can be received.
[0007]
In the above example, the ATC signal is transmitted from the ground side toward the upper side of the vehicle. However, the TD device detects the train position based on the signal transmitted from the upper side of the vehicle toward the loop L ′. There may be.
[0008]
Since the induction loop coil device having the above configuration is twisted at a position where the feeding noise induced by the loop L ′ cancels, the influence of the noise can be effectively removed. That is, the loop L ′ is superimposed as noise on the ATC signal and the train detection signal (TD signal) by the electromagnetic field due to the train line current flowing along the guide rails G1 and G2, that is, by the noise due to the feeding current. Since the noise is canceled by the twisting point, the influence of the noise can be eliminated.
[0009]
[Problems to be solved by the invention]
However, although the induction loop coil device using a loop having a conventional twisted point can effectively prevent noise by twisting the loop, as shown in FIG. In this respect, there is a drawback that the reception level of the on-board device 10 is lowered and there is a dead point at which transmission is interrupted.
[0010]
Accordingly, the present invention has been made to solve the above-described drawbacks, and an object thereof is to provide an induction loop device having no dead point.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, an induction loop coil device according to the present invention is a track that guides and runs a train and that has a conductor for supplying train current to the train. In an induction loop coil device that lays an induction loop coil along the traveling direction of the vehicle and transmits information on and over the induction loop coil, the induction loop coil is located on the right side of the track in the traveling direction of the track. The first loop portion is divided into a second loop portion located on the left side of the track, and the first loop portion and the second loop portion are provided along the traveling direction of the track. It is characterized in that it is divided in such a ratio that noises on the conductors induced on the right and left sides of the conductors cancel each other, and the induction loop coil is laid without being twisted .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a track R to which an induction loop coil device according to an embodiment is applied. In addition, the same code | symbol is attached | subjected and demonstrated to the same component as the said FIG.3 and FIG.4 (a).
[0013]
The train A is configured to be guided by a guide rail (guide rail) G1 and a guide rail G2 so as to travel on the track R, respectively. In FIG. 1, the guide rail G1 is shown for an upward train (train), and the guide rail G2 is shown for a downward train.
[0014]
Although not shown, each guide rail G1, G2 is provided with a train line (conductor) for supplying train current to a train traveling on the track R. Further, the train A is provided with a slider (not shown) that slides on the train line. Therefore, each guide rail G1, G2 can be regarded as a kind of conductor.
[0015]
In FIG. 1, L is a loop, of which L1 is a first loop and L2 is a second loop. As shown in FIG. 2, this loop L is positioned at a rate where the feeding noise that induces the loop L cancels along the traveling direction of the train A and on both the left and right sides of the guide rail (conductor) G1. Moreover, it is laid without twisting. In FIG. 2, the first loop L1 and the second loop L2 installed along the guide rail G2 are omitted for the sake of simplifying the drawing, but the loop L is also installed in the guide rail G2. Has been. Hereinafter, the loop L installed in the guide rail G1 will be described as an example.
[0016]
This loop L is configured to be supplied with an ATC signal sent from the signal generator S to the vehicle (train A) (see the arrow in the loop L in FIG. 2).
[0017]
On the train A, an on-board device 1 for performing predetermined train control such as speed control and brake control based on an ATC signal received from the ground side is provided. That is, the on-board device 1 is provided with on-board antennas A1 and A2 facing the first loop L1 and the second loop L2 laid on the ground side, and these on-board antennas A1 and A2 are provided. The ATC signal can be received from the loop L.
[0018]
In the above example, the ATC signal is transmitted from the ground side toward the vehicle upper side. However, the TD device detects the train position based on the signal transmitted from the vehicle upper side toward the loop L. You can also.
[0019]
In the induction loop coil device having the above-described configuration, noise shown in (1) to (4) in FIG. 2 is superimposed on the loop L due to the train current flowing in the guide rail (conductor) G1. Further, the noise shown in (5) to (8) in FIG. 2 is superimposed by the train current flowing in the adjacent guide rail (conductor) G2. However, the noises {circle around (1)} to {circle around (4)} and {circle around (5)} to {circle around (8)} are opposite to each other, so that the noise components are canceled out. Therefore, transmission can be performed without adversely affecting the ATC signal and the TD signal. In addition, since the loop L does not have a twisting point as in the prior art, it is possible to avoid the inconvenience that the transmission is interrupted in the middle.
[0020]
Even in the loop L (not shown) provided on the guide rail G2, noise can be effectively removed and transmission between the ground and the vehicle can be performed without interruption of transmission, as described above.
[0021]
【The invention's effect】
In the induction loop coil device according to the present invention, the loop is divided at a ratio where the feeding noise induced on the right side and the left side of the conductor provided along the traveling direction of the track on which the train travels is canceled and twisted. Since it is laid without being mounted, transmission can be performed without adversely affecting the ATC signal and the TD signal. In addition, since the loop does not have a twisting point as in the prior art, it is possible to avoid the inconvenience that transmission is interrupted in the middle.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a track to which an induction loop coil device according to an embodiment of the present invention is applied.
FIG. 2 is a schematic configuration diagram of an induction loop coil device according to an embodiment.
FIG. 3 is a cross-sectional view of a track to which a conventional induction loop coil device is applied.
FIG. 4 is a schematic configuration diagram of a conventional induction loop coil device.
[Explanation of symbols]
1 Onboard equipment A1, A2 Antenna R Track G1, G2 Guide rail (conductor)
L Induction loop coil (loop)
L1 First loop L2 Second loop S Signal generator A Train

Claims (1)

An induction loop coil is laid along the running direction of the track for the track that guides the train and travels with a conductor for supplying train current to the train. In the induction loop coil device that transmits information between the ground and the vehicle via the loop coil,
The induction loop coil is divided into a first loop portion located on the right side of the track and a second loop portion located on the left side of the track in the traveling direction of the track, loop portion and said second loop portion is divided in proportions such noise cancel on the conductor which is induced in the right and left sides of said conductor provided along the running direction of the track, and the An induction loop coil device, wherein the induction loop coil is laid without being twisted.

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