JP2823071B2 - Automatic train stop system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an automatic train stop system, and more particularly, to a variable-speed ATS system.

[0002]

2. Description of the Related Art Conventionally, when a train ignores or misidentifies a stop signal and continues to proceed, an automatic train stop (ATS: Automatic Trunk) that automatically applies a brake to stop the train.
As the ain Stopper system, a variable-speed ATS system and the like are known.

FIG. 7 is a schematic diagram showing the principle of the variable-speed ATS system 5. As shown in the figure, on the ground (for example, between the gauges) outside the position of the traffic signal 11 by a predetermined distance R, the switching of the SW is controlled by a switching signal from the traffic signal 11, and the value of the resonance frequency f becomes f0 or f1. A grounding element 14 having a switching resonance circuit is provided.

[0004] The train 12 is provided with an oscillating circuit that oscillates at a constant frequency f0, and an on-board element 13 having a resonance coil 13a as a feedback circuit is connected to the oscillating circuit. The vehicle upper child 13 is installed at a position in the train 12 that passes just above the above ground child 14.

In the resonance circuit of the grounding element 14, when the traveling signal (G) is displayed at the traffic light 11, the switch is turned off by the switching signal, and the value of the resonance frequency f becomes f.
When the stop signal (R) is displayed at the traffic light 11, the switch is turned on by the switch signal, and the value of the resonance frequency f is switched to f1.

That is, in the resonance circuit of the ground arm 14, when the traveling of the train 12 is permitted by the switching signal from the traffic light 11, the value of the resonance frequency f is switched to the oscillation frequency value f0, and conversely. To stop the train 12,
The value of the resonance frequency f switches to a value f1 different from the oscillation frequency f0.

In the variable-speed ATS system 5, when the train 12 passes over the ground child 14, when the ground child 14 and the vehicle child 13 face each other, the feedback circuit (resonance circuit) of the vehicle child 13 Via the coil 13a), the oscillation frequency f0 of the oscillation circuit and the resonance frequency f
(F0 or f1).

At this time, when the oscillation frequency matches the resonance frequency (oscillation frequency = resonance frequency = f0
), That is, when the train 12 is allowed to proceed, there is no change in the oscillation frequency f0, but when the oscillation frequency is different from the resonance frequency (oscillation frequency = f0, resonance frequency = f1), When stopping the motor 12, electromagnetic induction generated between the feedback circuit (resonant coil 13 a) of the vehicle arm 13 and the resonance circuit of the ground arm 14 causes
The oscillation frequency f0 of the oscillation circuit is changed to the resonance frequency f1.

The train 12 detects the frequency change state of the oscillation frequency (oscillation frequency f0 → f1) and sounds an alarm buzzer. If the crew member applies the brakes within a predetermined time and does not press the confirmation button, The train is automatically stopped to stop the train 12.

[0010]

However, such a conventional variable frequency ATS system 5 has the following problems.

FIG. 8 is a schematic diagram showing the relationship between the magnetic field generated between the primary coil 13a (resonant coil) and the secondary coil 13b of the vehicle body and the conductor 15. The primary coil 13a and the secondary coil 13b shown in the figure are feedback circuits of an oscillation circuit, and the primary coil 13a (resonant coil) oscillates at a constant frequency f0 based on the oscillation frequency from the oscillation circuit.
When the vehicle arm 13 faces the ground arm 14 and the resonance frequency of the ground arm 14 is f1, the oscillation frequency of the primary coil 13a is changed to f1 by electromagnetic induction.

Here, a predetermined current I1 is supplied to the primary coil 13a.
, A magnetic flux φ1 is generated around the primary coil 13a as shown in FIG. At this time, if there is a conductor 15 (for example, a metal body of a device installed under the floor of the vehicle, an iron sleeper, a rail, or the like) near the vehicle upper body 13, the magnetic flux φ1 is generated inside the conductor 15 by the magnetic flux φ1. Eddy current I3
The eddy current I3 generates a magnetic flux φ2 as shown in FIG.

The magnetic flux φ2 acts in a direction obstructing the magnetic flux φ1, so that the primary coil 13
a and the mutual inductance M0 between the secondary coil 13b
Value increases.

FIG. 9 is a diagram in which the schematic diagram shown in FIG. 8 is replaced with an electrical equivalent circuit. As shown in the drawing, the conductor 15 corresponds to an external coil, and an eddy current I3 flows due to a low resistivity. The eddy current I3 causes the external coil (conductor) 15 and the primary coil of the vehicle body 13 to move. Mutual inductances M1 and M2 are generated between the primary coil 13a and the secondary coil 13b, respectively, so that the value of the mutual inductance M0 between the primary coil 13a and the secondary coil 13b of the vehicle body 13 increases.

In the upper armature 13, the primary coil 13a and the secondary coil 13b
This raises the problem that the degree of coupling between them increases, which hinders detection of frequency change of the oscillation frequency of the oscillation circuit.

On the other hand, the resonance circuit of the grounding element 14 is shown in FIG.
As shown in (1), when the primary coil 13a of the vehicle upper element 13 faces the ground element 14, a resonance current flows by electromagnetic induction. At this time, if a conductor 15 (for example, an iron sleeper, a track reinforcing iron plate, or the like) exists near the ground arm 14, an eddy current flows inside the conductor 15 as in the case of the vehicle arm 13 described above. The value of the self-inductance L0 of the resonance circuit decreases due to the eddy current.

In the resonance circuit, the self inductance L
Due to the decrease of 0, a change in circuit characteristics such as a decrease in the value of Q (resonance sharpness) of the resonance circuit and an increase in the value of the resonance frequency f occurs. When changing the oscillation frequency f0 of the coil 13a, there is a problem that the oscillation frequency value cannot be changed to f1 as designed, or the margin is narrow.

Conventionally, in order to solve the above-mentioned problems in the slab track, a conductor which is located near the vehicle armature 13 and which electromagnetically affects the feedback circuit of the vehicle armature 13 has been proposed. An aluminum shield is provided between the conductor 15 and the grounding element 14 which is located between the grounding element 14 and the grounding element 13 or in the vicinity of the grounding element 14. A variable-frequency ATS system provided with a plate is known, but also in this case, it is not possible to sufficiently suppress an increase in the degree of coupling in the feedback circuit of the vehicle body 13 and to change the oscillation frequency of the oscillation circuit. It does not hinder the detection of the circumference, or cannot sufficiently suppress the decrease in the value of Q (sharpness of resonance) in the resonance circuit of the ground element 14, and the oscillation frequency of the primary coil 13a of the vehicle element 13 due to electromagnetic induction. When changing the frequency Degree there is a problem that narrow.

Therefore, when the automatic train stop system is introduced, the conductor 1 that has an electromagnetic effect on the feedback circuit of the upper armature 13 and the resonance circuit of the ground arm 14 is required.
5 must be removed (moved) from the vicinity of the installation position of the vehicle upper element 13 and the ground element 14 or the circuit characteristics of the oscillation circuit and the resonance circuit must be adjusted according to the electromagnetic environment at the installation position. For example, there is a problem that time and labor are required for the work at the time of introduction, which leads to an increase in cost.

[Purpose] The present invention has been made in view of the above-mentioned problems, and has high transparency to an electromagnetic effect from a conductor located in the vicinity of a feedback circuit of an upper vehicle element and a resonance circuit of a ground element. An object of the present invention is to provide an automatic train stop system that is reduced by a shield plate formed of a material having a high magnetic resistivity and a high resistivity and is not affected by the electromagnetic influence from the conductor.

[0021]

An automatic train stop system according to claim 1, wherein a resonance frequency is set based on signal information from the traffic light on a ground outside a predetermined distance from an installation position of the traffic light for controlling operation of the train. A grounding element having a resonance circuit controlled is installed, and the train is provided with an oscillating circuit that oscillates at a constant frequency, and a vehicle element having a feedback circuit connected to the oscillating circuit is opposed to the grounding element. Installed on the train as described above, according to the signal information from the signal, when allowing the train to travel, when matching the resonance frequency of the resonance circuit with the oscillation frequency of the oscillation circuit, and when stopping the train, The resonance frequency is controlled to be different from the oscillation frequency, and when the vehicle arm faces the ground member, when the oscillation frequency is different from the resonance frequency, a feedback circuit of the vehicle arm and In the automatic train stop system in which the train side detects a state in which the oscillation frequency is changed to the resonance frequency by electromagnetic induction between the ground circuit and the resonance circuit, and automatically stops the state, the feedback circuit of the vehicle armature And a shield plate made of a material having a high magnetic permeability and a high resistivity is provided between the conductor that is electromagnetically affected by the feedback circuit and the feedback circuit. It is characterized by.

Therefore, according to the automatic train stop system according to the first aspect, the conductor is located near the feedback circuit of the vehicle upper body, and between the conductor that electromagnetically affects the feedback circuit and the feedback circuit. Since the shield plate made of a material having high magnetic permeability and high resistivity is provided, mutual inductance between the primary coil and the secondary coil of the vehicle body due to electromagnetic influence from the conductor is provided. , And an increase in the degree of coupling between the primary coil and the secondary coil can be reduced.

Therefore, it is possible to solve the problem that the change in the oscillation frequency of the primary coil in the vehicle body is hindered, and to provide a vehicle body that is not affected by the electromagnetic influence from the conductor. .

An automatic train stop system according to claim 2 is
On the ground outside a predetermined distance from the installation position of the traffic light that controls the operation of the train, install a grounding element with a resonance circuit whose resonance frequency is controlled based on signal information from the traffic light,
The train is provided with an oscillation circuit that oscillates at a constant frequency, and a vehicle upper arm including a feedback circuit connected to the oscillation circuit is installed on the train so as to face the ground arm, and according to signal information from the signal, When allowing the train to travel, the resonance frequency of the resonance circuit is made to match the oscillation frequency of the oscillation circuit, and when stopping the train, the resonance frequency is controlled to be different from the oscillation frequency. ,
If the oscillation frequency is different from the resonance frequency when the vehicle arm faces the ground arm, the oscillation frequency is increased by electromagnetic induction between the feedback circuit of the vehicle arm and the resonance circuit of the ground arm. In the automatic train stop system for automatically stopping the vehicle by detecting the state of being changed to the resonance frequency on the train side, a conductive member which is located near the resonance circuit of the ground member and has an electromagnetic effect on the resonance circuit. A shield plate made of a material having high magnetic permeability and high resistivity is provided between the body and the resonance circuit.

Therefore, according to the automatic train stop system of the second aspect, the resonance circuit is located between the conductor located near the resonance circuit of the grounding element and electromagnetically affecting the resonance circuit and the resonance circuit. Since a shield plate made of a material having high magnetic permeability and high resistivity is provided, a decrease in the self-inductance of the resonance circuit of the grounding element due to electromagnetic influence from the conductor is suppressed, and Q ( It is possible to suppress a decrease in the value of the resonance sharpness) and an increase in the value of the resonance frequency.

Therefore, when the oscillation frequency of the primary coil of the vehicle upper arm is changed by electromagnetic induction on the ground element, the oscillation frequency value cannot be changed as designed.
Alternatively, it is possible to solve the problem that the margin is narrow, and to provide a grounding element that is not affected by the electromagnetic influence from the conductor.

An automatic train stop system according to claim 3 is
On the ground outside a predetermined distance from the installation position of the traffic light that controls the operation of the train, install a grounding element with a resonance circuit whose resonance frequency is controlled based on signal information from the traffic light,
The train is provided with an oscillation circuit that oscillates at a constant frequency, and a vehicle upper arm including a feedback circuit connected to the oscillation circuit is installed on the train so as to face the ground arm, and according to signal information from the signal, When allowing the train to travel, the resonance frequency of the resonance circuit is made to match the oscillation frequency of the oscillation circuit, and when stopping the train, the resonance frequency is controlled to be different from the oscillation frequency. ,
If the oscillation frequency is different from the resonance frequency when the vehicle arm faces the ground arm, the oscillation frequency is increased by electromagnetic induction between the feedback circuit of the vehicle arm and the resonance circuit of the ground arm. In the automatic train stop system for detecting the state of being changed to the resonance frequency on the train side and automatically stopping the train, the train is located near the feedback circuit of the upper armature and has an electromagnetic influence on the feedback circuit. Located between the conductor and the feedback circuit, and near the resonance circuit of the grounding element,
It is characterized in that a shield plate made of a material having high magnetic permeability and high resistivity is provided between a conductor having electromagnetic influence on the resonance circuit and the resonance circuit.

Therefore, according to the automatic train stop system according to the third aspect, between the conductor and the conductor which is located near the feedback circuit of the vehicle upper body and electromagnetically affects the feedback circuit, And between the conductor which is located in the vicinity of the resonance circuit of the grounding element and electromagnetically affects the resonance circuit and the resonance circuit, is formed of a material having a high magnetic permeability and a high resistivity. Since the shield plate is provided, an increase in the mutual inductance between the primary coil and the secondary coil of the vehicle upper body due to the electromagnetic influence from the conductor is suppressed.
It is possible to reduce an increase in the degree of coupling between the secondary coil and the secondary coil. Also, similarly, it is possible to suppress a decrease in the self-inductance of the resonance circuit of the ground element due to the electromagnetic influence from the conductor, and to suppress a decrease in the value of Q (sharpness of resonance) and an increase in the value of the resonance frequency in the resonance circuit. It becomes possible.

Therefore, there is a problem in that a change in the oscillation frequency of the primary coil in the vehicle body is hindered, and when the oscillation frequency of the primary coil in the vehicle body is varied by electromagnetic induction in the ground element. It is possible to solve the problems that the oscillation frequency value cannot be changed according to the design value or the margin thereof is narrow, and to provide an automatic train stop system that is not influenced by the electromagnetic influence from the conductor. be able to.

As described above, according to the automatic train stop system according to the first to third aspects, it is possible to improve the cost of a track using an iron sleeper, a track reinforcing iron plate, or the like, which has been difficult to apply conventionally. It becomes possible to introduce an automatic train stop system at a cost. Also, at the time of introduction, conductors that have an electromagnetic effect are removed (moved) from the vicinity of the installation position of the vehicle child and ground child.
Or to adjust the circuit characteristics of the oscillation circuit and the resonance circuit in accordance with the electromagnetic environment of the installation position, so that the work load at the time of introduction can be reduced and the cost can be reduced. Can be.

The material having high magnetic permeability and high resistivity includes ferrite. Ferrite has a magnetization mechanism based on ferrimagnetism, its structure is represented by MO.Fe ₂ O ₃ , and M contains a divalent metal atom.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. The basic principle of the variable-speed ATS system in the first to third examples of the embodiment described below is the same as that of the above-described conventional example, so that illustration and description thereof are omitted. Only the parts unique to the embodiment will be described.

(First Embodiment) FIGS. 1 and 2 show a variable-speed ATS system 1 according to a first embodiment to which the automatic train stop system of the present invention is applied.

FIG. 1 shows the primary coil 13a of the upper armature 13.
FIG. 4 is a schematic diagram showing a relationship between a (resonant coil) and a magnetic field generated between a secondary coil 13b and a conductor 15; In the figure, a ferrite shield plate 4 is provided between a vehicle upper body 13 and a conductor 15. The ferrite shield plate 4 is made by integrally forming ferrite into a plate shape with a polyester resin, and has a high magnetic permeability and a high resistivity.

Here, a predetermined current I1 is applied to the primary coil 13a.
Flows, a magnetic flux φ1 is generated around the primary coil 13a as shown in FIG. At this time, the ferrite shield plate 4 is provided between the upper armature 13 and the conductor 15 (for example, a metal body of an apparatus installed under the floor of the vehicle, an iron sleeper, a rail, a steel plate for reinforcing tracks). Therefore, the generated magnetic flux φ1 is concentrated on the ferrite shield plate 4 having a high magnetic permeability. Therefore, the generation of the eddy current inside the conductor 15 can be suppressed, and the generation of the conventional magnetic flux φ2 as shown in FIG. 8 can be suppressed as much as possible.

Since the ferrite shield plate 4 has a high resistivity, the magnetic flux φ1 is concentrated and no current is generated.

As a result, the primary coil 13a of the upper armature 13
It is possible to reduce the increase in the mutual inductance M0 between the primary coil 13a and the secondary coil 13b due to the electromagnetic influence from the conductor 15.
This makes it possible to suppress an increase in the degree of coupling with b.

If the ferrite shield plate 4 is arranged between the vehicle upper body 13 and the conductor 15 as described above, the conventional variable-frequency ATS system 5 which has already been introduced can be used.
It is possible to eliminate the electromagnetic effect on the vehicle body 13 at a low cost.

Incidentally, the ferrite shield plate 4 may be configured to be installed inside the vehicle upper body 13. FIG.
Vehicle upper arm 1 with ferrite shield plate 4 provided inside
FIG. 3 is a cross-sectional view illustrating a configuration of No. 3;

Referring to FIG.
6, a ferrite shield plate 4 for preventing electromagnetic influence from a metal body (conductor) of equipment installed under the floor of the vehicle is located above, and below the primary coils 13a and 13a.
The secondary coil 13b is disposed in a loosely coupled state, and the ferrite shield plate 4, the primary coil 13a, and the secondary coil 13b are made of FRP (Fiberglass Reinforced Plastics:
Molded with a molding material 17 such as reinforced plastic.

With the configuration in which the ferrite shield plate 4 is installed inside the vehicle upper 13 as described above, it is possible to further shield the electromagnetic effect from the conductor 15 provided on the vehicle upper 13 itself. Becomes In addition, by adopting a configuration in which the ferrite shield plate 4 is installed inside the vehicle upper arm 13 in advance, when the variable-speed ATS system 1 is introduced, the vehicle upper arm 13 and the conductive material located outside the vehicle upper arm 13 are installed. The labor of installing the ferrite shield plate 4 with the body 15 can be omitted.

As described above, according to the frequency-variable ATS system 1 of the present embodiment, the conductive type is located near the feedback circuit of the upper armature 13 and electromagnetically affects the feedback circuit. Since the ferrite shield plate 4 having a high magnetic permeability and a high resistivity is provided between the body 15 and the feedback circuit, the primary coil 13a of the vehicle body 13 due to the electromagnetic influence from the conductor 15 is provided. It is possible to suppress an increase in the mutual inductance M0 between the primary coil and the secondary coil 13b, thereby reducing an increase in the degree of coupling between the primary coil and the secondary coil.

Therefore, it is possible to solve the problem that the change in the oscillation frequency of the primary coil 13a in the vehicle body 13 is hindered, and to provide the vehicle body 13 which is not influenced by the electromagnetic influence from the conductor 15. can do. The above is the description of the first embodiment.

(Second Embodiment) Next, a variable-speed ATS system 2 according to a second embodiment to which the automatic train stop system of the present invention is applied will be described.

The resonance circuit of the grounding element 14 is an LC resonance circuit as shown in FIG.
When the primary coil 13a is opposed, a resonance current flows by electromagnetic induction. At this time, although not shown, if the ferrite shield plate 4 is provided between the ground member 14 and the conductor 15 (for example, an iron sleeper, a rail, an iron plate for reinforcing tracks), the above-described embodiment will be described. As in the case of the upper armature 13 described in the first example, the magnetic flux generated by the resonance current concentrates on the ferrite shield plate 4 having a high magnetic permeability. Therefore, the generation of the eddy current inside the conductor 15 can be suppressed, and the reduction of the self-inductance of the resonance circuit due to the eddy current can be suppressed as much as possible.

Since the ferrite shield plate 4 has a high resistivity, the magnetic flux concentrates and no current is generated.

As a result, in the resonance circuit of the grounding element 14, it is possible to suppress a decrease in the value of Q (resonance sharpness) of the resonance circuit and an increase in the value of the resonance frequency due to a decrease in the self-inductance. In addition, it is possible to prevent a change in circuit characteristics due to an electromagnetic influence from the conductor 15.

If the ferrite shield plate 4 is arranged between the ground element 14 and the conductor 15 in this manner, the conventional variable frequency ATS system 5 which has already been introduced can be used.
It is possible to eliminate the electromagnetic effect on the grounding element 14 at a low improvement cost.

The ferrite shield plate 4 may be installed inside the ground arm 14, as in the case of the vehicle arm 13 described in the first example of the above embodiment. With the configuration in which the ferrite shield plate 4 is installed inside the ground member 14 in this manner, the ground member 14
It is also possible to cut off the electromagnetic influence from the conductor 15 provided therein. Further, by adopting a configuration in which the ferrite shield plate 4 is installed inside the grounding element 14 in advance in this way, when the variable-frequency ATS system 2 is introduced, the grounding element 14 and the conductors 15 located outside thereof are installed. This eliminates the need to install the ferrite shield plate 4 between them.

As described above, according to the variable-frequency ATS system 2 of the present embodiment, the conductor located near the resonance circuit of the grounding element 14 and electromagnetically affecting this resonance circuit Since the ferrite shield plate 4 having a high magnetic permeability and a high resistivity is provided between the resonance circuit 15 and the resonance circuit, the self-inductance of the resonance circuit of the ground element 14 due to the electromagnetic influence from the conductor 15 is reduced. It is possible to suppress the decrease and suppress the decrease in the value of Q (resonance sharpness) and the increase in the value of the resonance frequency in the resonance circuit.

Therefore, when the oscillation frequency of the primary coil 13a of the vehicle upper arm 13 is changed by electromagnetic induction in the ground arm 14, the oscillation frequency value cannot be changed according to the design value, or a margin thereof. It is possible to solve the problem that the degree is small and to provide the grounding element 14 that is not affected by the electromagnetic influence from the conductor 15. The above is the description of the second embodiment.

(Third Embodiment) Next, in a variable-speed ATS system 3 according to a third embodiment to which the automatic train stop system of the present invention is applied, a vehicle armature according to the third embodiment will be described. The vehicle armature 13 described in one example and the ground armature 1 described in the second example of the above embodiment as a ground armature
4 is adopted. Note that the ferrite shield plate 4 may be configured to be installed inside the vehicle arm 13 or the ground arm 14.

Therefore, variable-speed AT in the present embodiment
According to the S system 3, it is located near the feedback circuit of the vehicle arm 13, between the conductor 15 having electromagnetic influence on the feedback circuit and the feedback circuit, and of the resonance circuit of the ground arm 14. High magnetic permeability, between the conductor 15 which is located in the vicinity and electromagnetically affects the resonance circuit and the resonance circuit.
Further, since the ferrite shield plate 4 having a high resistivity is provided, an increase in the mutual inductance M0 between the primary coil 13a and the secondary coil 13b of the vehicle body 13 due to the electromagnetic influence from the conductor 15 is prevented. It is possible to suppress the increase in the degree of coupling between the primary coil and the secondary coil. Similarly, a decrease in the self-inductance of the resonance circuit of the ground element 14 due to the electromagnetic influence from the conductor 15 is suppressed, and a decrease in the value of Q (sharpness of resonance) and an increase in the value of the resonance frequency in the resonance circuit are suppressed. It becomes possible.

Therefore, there is a problem in that the oscillation of the primary coil 13a of the vehicle arm 13 is hindered from changing its frequency, and the oscillation frequency of the primary coil 13a of the vehicle arm 13 is reduced by electromagnetic induction in the ground arm 14. When changing the frequency,
The frequency-variable ATS system 3 which is not affected by the electromagnetic influence from the conductor 15 at once can solve the problem that the oscillation frequency value cannot be varied as designed or its margin is narrow. Can be provided. The above is the description of the third embodiment.

According to the variable-speed ATS system of the first to third examples of the above-described embodiment, a track using an iron sleeper, a track reinforcing iron plate, or the like, which has been conventionally difficult to apply, is used. As a result, it becomes possible to introduce a variable frequency ATS system at a low cost. In addition, at the time of introduction, the conductor 15 that exerts electromagnetic influence is removed (moved) from the vicinity of the installation position of the vehicle arm 13 or the ground member 14, or the oscillation circuit or the resonance circuit according to the electromagnetic environment of the installation position. Since it is not necessary to perform the operation of re-adjusting the circuit characteristics, the work load at the time of introduction can be reduced, and the cost can be reduced.

[0056]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment relating to the automatic train stop system of the present invention will be described below. (Embodiment 1) First, when the ferrite shield plate 4 is provided between the vehicle upper body 13 and the conductor 15 (iron plate), the distance between the primary coil 13a and the secondary coil 13b of the vehicle upper body 13 is increased. The measurement was performed based on the following test conditions (see FIG. 3) in relation to the degree of binding.

The degree of coupling is represented by (Equation 1). Degree of coupling = −jωMI (1) where ω = 2πf M = mutual inductance M0 I = primary coil current I1

[Test conditions] When the coupling degree in free space is 80 [mV], the distance from the conductor 15 (iron plate) to the vehicle upper body 13 is h.
Assuming that the distance h1 is variously changed as 1, that is, the case without the shield plate (see FIG. 3A). An aluminum shield plate is provided 100 [mm] above the conductor 15 (iron plate), and the vehicle upper body 1 is separated from the conductor 15 (iron plate).
The case where the distance up to 3 is h1 and this distance h1 is variously changed, that is, the case where an aluminum shield plate is provided (see FIG. 3B). When the ferrite shield plate 4 is provided 100 [mm] above the conductor 15 (iron plate) and the distance from the conductor 15 (iron plate) to the vehicle body 13 is h1, the distance h1 is variously changed. , Ferrite shield plate 4
(See FIG. 3B).

FIG. 4 shows the measurement results of the degree of coupling between the primary coil 13a and the secondary coil 13b of the vehicle body 13 based on the above test conditions. As can be seen from the measurement results shown in the figure, the case where the ferrite shield plate 4 is provided between the vehicle upper body 13 and the conductor 15 (iron plate) is compared with the case where the shield plate is not provided or the case where the aluminum shield plate is provided. As a result, the increase in the degree of coupling due to the electromagnetic influence from the conductor 15 can be further suppressed.

When the ferrite shield plate 4 is provided, the value of the degree of coupling in the standard mounting size of the vehicle body (h1 = 350 [mm]) is defined as the degree of coupling (80 [mV]) in free space. In comparison, it was possible to limit the increase to about 4 [mV].

(Embodiment 2) Next, the ground element 14 and the conductor 1
Q (resonance sharpness) in the resonance circuit of the grounding element 14 when the ferrite shield plate 4 is provided between the ferrite shield plate 4 and the iron plate 5 (iron plate).
The measurement was performed based on the following test conditions (see FIG. 5).

In the resonance circuit of the grounding element 14 (LC resonance circuit), the value of the resonance frequency f also fluctuates due to electromagnetic influence from the conductor 15 (iron plate). The test is omitted because it can be adjusted by the resonance capacitor of the circuit.

[Test Conditions] The above Q in free space
When the value of (resonance sharpness) is 210, the distance from the conductor 15 (iron plate) to the ground element 14 is h
2, when the distance h2 is variously changed, that is, when there is no shield plate (see FIG. 5A). An aluminum shield plate is provided 100 [mm] above the conductor 15 (iron plate), and the conductor 15 (iron plate) is
In the case where the distance up to No. 4 is h2 and this distance h2 is variously changed, that is, the case where an aluminum shield plate is provided (see FIG. 5B). When the ferrite shield plate 4 is provided 100 [mm] above the conductor 15 (iron plate) and the distance from the conductor 15 (iron plate) to the ground element 14 is h2, this distance h2 is variously changed. Ferrite shield plate 4
(See FIG. 5B).

FIG. 6 shows the measurement results of Q (resonance sharpness) in the resonance circuit of the grounding element 14 based on the above test conditions. As can be seen from the measurement results shown in the figure, the case where the ferrite shield plate 4 is provided between the ground member 14 and the conductor 15 (iron plate) is compared with the case where the shield plate is not provided or the case where the aluminum shield plate is provided. As a result, it is possible to further suppress the decrease in the value of Q (sharpness of resonance).

In the figure, Q (resonance sharpness)
Decreases greatly depending on the distance h2 from the conductor 15 (iron plate) to the ground member 14, but if the distance h2
= 150 [mm], the Q in free space
Compared with the value (210) of (sharpness of resonance), it is possible to reduce the value of Q to about 40, which is a value in a sufficiently practicable range.

Although the present invention has been described in detail with reference to the embodiments and examples, the present invention is not limited to the above-described embodiments and examples, and does not depart from the gist of the present invention. Needless to say, it can be changed as appropriate.

For example, in the above embodiments and examples, the ferrite shield plate 4 is attached to the lower part of the vehicle body 13 or the ground element 14 (see FIGS. 1, 3 and 5), or Although it is configured to be installed in the upper part of the casing 16 (see FIG. 2), the installation position of the ferrite shield plate 4 is not limited to the above description. The position may be any position as long as it is between the resonance circuit of the ground element 14 and the conductor 15.

[0068]

According to the automatic train stop system according to the first aspect of the present invention, the position between the conductor which is located in the vicinity of the feedback circuit of the vehicle upper body and electromagnetically affects the feedback circuit and the feedback circuit is provided. Is provided with a shield plate made of a material having high magnetic permeability and high resistivity, so that the mutual interaction between the primary coil and the secondary coil of the vehicle body due to electromagnetic influence from the conductor is provided. It is possible to suppress an increase in inductance and reduce an increase in the degree of coupling between the primary coil and the secondary coil. Therefore, it is possible to provide a vehicle upper body that is not affected by the electromagnetic influence from the conductor.

According to the automatic train stop system according to the second aspect, a high position is provided between the conductor and the conductor which is located near the resonance circuit of the ground element and electromagnetically affects the resonance circuit. Since the shield plate made of a material having high magnetic permeability and high resistivity is provided, it is possible to suppress a decrease in the self-inductance of the resonance circuit of the grounding element due to the electromagnetic influence from the conductor, and to reduce the Q (resonance) in the resonance circuit. ) And an increase in the value of the resonance frequency can be suppressed. Therefore, it is possible to provide a grounding element that is not affected by the electromagnetic influence from the conductor.

According to the automatic train stop system according to the third aspect, between the conductor which is located in the vicinity of the feedback circuit of the vehicle upper body and electromagnetically affects the feedback circuit and the feedback circuit, and A shield formed of a material having a high magnetic permeability and a high resistivity between a conductor located in the vicinity of the resonance circuit of the grounding element and having an electromagnetic effect on the resonance circuit and the resonance circuit. Since the plate is provided, it is possible to suppress an increase in mutual inductance between the primary coil and the secondary coil of the vehicle upper body due to electromagnetic influence from the conductor, and to provide a coupling between the primary coil and the secondary coil. It is possible to reduce the increase in the degree. Also, similarly, it is possible to suppress a decrease in the self-inductance of the resonance circuit of the ground element due to the electromagnetic influence from the conductor, and to suppress a decrease in the value of Q (sharpness of resonance) and an increase in the value of the resonance frequency in the resonance circuit. It becomes possible. Therefore, it is possible to provide an automatic train stop system that is not affected by the electromagnetic influence from the conductor.

According to the automatic train stop system of the first to third aspects, it is possible to reduce the cost of improving a track using an iron sleeper or a track reinforcing iron plate, which has been difficult to apply conventionally. With this, an automatic train stop system can be introduced. In addition, at the time of introduction, the conductor that exerts electromagnetic influence is removed (moved) from the vicinity of the installation position of the vehicle arm or the ground member, or the circuit characteristics of the oscillation circuit and the resonance circuit are changed according to the electromagnetic environment at the installation position. Since it is not necessary to perform an operation such as readjustment, the work load at the time of introduction can be reduced, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a relationship between a magnetic field generated between a primary coil (resonant coil) and a secondary coil of a vehicle body to which the present invention is applied and a conductor.

FIG. 2 is a cross-sectional view showing a configuration of a vehicle upper body when a ferrite shield plate is provided inside.

FIG. 3 is a view showing test conditions in Example 1.

FIG. 4 is a view showing a measurement result when a degree of coupling between a primary coil and a secondary coil of a vehicle body is measured based on the test conditions shown in FIG. 3;

FIG. 5 is a diagram showing test conditions in Example 2.

FIG. 6 is a view showing a measurement result when a value of Q (resonance sharpness) in a resonance circuit of the grounding element is measured based on the test conditions shown in FIG. 5;

FIG. 7 is a schematic diagram illustrating the principle of a variable-speed ATS system.

FIG. 8 is a schematic diagram illustrating a relationship between a magnetic field generated between a primary coil (resonant coil) and a secondary coil of a vehicle body and a conductor.

FIG. 9 is a diagram in which the schematic diagram shown in FIG. 8 is replaced with an electrical equivalent circuit.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 variable-frequency ATS system 2 variable-frequency ATS system 3 variable-frequency ATS system 4 ferrite shield plate 11 traffic light 12 train 13 vehicle upper body 13 a primary coil (resonant coil) 13 b secondary coil 14 ground conductor 15 conductor (external) Coil) 16 Casing 17 Molding material

Claims (3)

(57) [Claims] 1. A grounding element having a resonance circuit whose resonance frequency is controlled based on signal information from the traffic light, is installed on the ground outside a predetermined distance from the installation position of the traffic light for controlling the operation of the train, The train is provided with an oscillation circuit that oscillates at a constant frequency, and a vehicle upper arm including a feedback circuit connected to the oscillation circuit is installed on the train so as to face the ground arm, and according to signal information from the signal, When allowing the train to travel, the resonance frequency of the resonance circuit is made to match the oscillation frequency of the oscillation circuit, and when stopping the train, the resonance frequency is controlled to be different from the oscillation frequency. When the oscillation frequency is different from the resonance frequency when the vehicle arm faces the ground arm, the oscillation frequency is generated by electromagnetic induction between the feedback circuit of the vehicle arm and the resonance circuit of the ground arm. In the automatic train stop system for automatically stopping the vehicle by detecting the state where the number is changed to the resonance frequency on the train side, the train is located near the feedback circuit of the upper armature, and has an electromagnetic influence on the feedback circuit. An automatic train stop system comprising a shield plate made of a material having high magnetic permeability and high resistivity provided between a conductor that exerts the above effect and the feedback circuit. 2. A grounding element having a resonance circuit whose resonance frequency is controlled based on signal information from the traffic light, is installed on the ground outside a predetermined distance from the installation position of the traffic light for controlling the operation of the train, The train is provided with an oscillation circuit that oscillates at a constant frequency, and a vehicle upper arm including a feedback circuit connected to the oscillation circuit is installed on the train so as to face the ground arm, and according to signal information from the signal, When allowing the train to travel, the resonance frequency of the resonance circuit is made to match the oscillation frequency of the oscillation circuit, and when stopping the train, the resonance frequency is controlled to be different from the oscillation frequency. When the oscillation frequency is different from the resonance frequency when the vehicle arm faces the ground arm, the oscillation frequency is generated by electromagnetic induction between the feedback circuit of the vehicle arm and the resonance circuit of the ground arm. In an automatic train stop system in which the number is changed to the resonance frequency to detect the state on the train side and automatically stop the train, the train is located near the resonance circuit of the grounding element, and the electromagnetic influence on the resonance circuit is reduced. An automatic train stop system, comprising a shield plate formed of a material having high magnetic permeability and high resistivity between an electric conductor to be applied and the resonance circuit. 3. A grounding element provided with a resonance circuit whose resonance frequency is controlled based on signal information from the traffic light, on a ground outside a predetermined distance from an installation position of the traffic light for controlling operation of the train, The train is provided with an oscillation circuit that oscillates at a constant frequency, and a vehicle upper arm including a feedback circuit connected to the oscillation circuit is installed on the train so as to face the ground arm, and according to signal information from the signal, When allowing the train to travel, the resonance frequency of the resonance circuit is made to match the oscillation frequency of the oscillation circuit, and when stopping the train, the resonance frequency is controlled to be different from the oscillation frequency. When the oscillation frequency is different from the resonance frequency when the vehicle arm faces the ground arm, the oscillation frequency is generated by electromagnetic induction between the feedback circuit of the vehicle arm and the resonance circuit of the ground arm. In the automatic train stop system for automatically stopping the vehicle by detecting the state where the number is changed to the resonance frequency on the train side, the train is located near the feedback circuit of the upper armature, and has an electromagnetic influence on the feedback circuit. Between the conductor and the feedback circuit, and between the conductor and the resonance circuit that electromagnetically affect the resonance circuit. And an automatic train stop system provided with a shield plate formed of a material having a high resistivity.