HK1163028B - Train information transmitting and receiving system - Google Patents

Description

Train information transmitting and receiving system

Technical Field

The present invention relates to a train information transmitting/receiving system that controls various information for monitoring, controlling, and checking various electric devices mounted on a train, and transmits and receives various information while bridging between vehicles in a train.

Background

Conventionally, there are such automotive electrical systems (for example, refer to patent document 1): in an automotive electrical system in which power is supplied from a direct-current power supply to an electrical device through a semiconductor power converter, a wire is used for wiring from the direct-current power supply to the semiconductor power converter, the wire being formed from a conductive material through which a main current flows, a first insulating material, a sheet-like electrostatic shield material, a second insulating material, and a sheet-like magnetic shield material in a concentric circular shape in this order from the center, one end of the electrostatic shield material being connected to a ground potential of the semiconductor power converter, and one end of the magnetic shield material being connected to a housing of the semiconductor power converter. The shielding of this electrical system is single-sided grounded.

Patent document 1: japanese laid-open patent publication No. 2002-

Disclosure of Invention

Since railway vehicles are equipped with devices that generate noise, such as a motor and an inverter, a transmission line having noise resistance is required to transmit information between vehicles at high speed. In order to ensure noise resistance, a cable (cable) having a shield layer (shielding layer) for the purpose of shielding noise is used for a transmission line.

Generally, the shielding layer is grounded at 2 positions at both ends of the cable to improve the shielding effect. However, since the ground potential of the car body in the railway vehicle is not constant and the potential varies depending on the place and time, if the shield is grounded to the car body at two points at both ends, a large amount of current flows through the shield, which may cause burnout. Therefore, grounding is performed only at 1 site on one side. In particular, when the vehicle is different, attention is required due to a large potential difference.

The technique described in patent document 1 is a technique in which the shield layer is grounded only at 1 site on one side, and is applied to automobiles, but cannot be applied to a transmission line for connecting information between vehicles such as a train.

In a railway vehicle, a vehicle jumper cable is used to electrically connect adjacent vehicles. A vehicle jumper cable is a jumper cable (jumpercable) in which a plurality of kinds of wires are bundled. In order to prepare for a vehicle failure or the like, there is also a rescue jumper cable in which the lowest necessary signal line is connected to the power line so that another different type of braid can also pull the train.

When shielded electric wires are used for these jumper cables, the direction of the jumper cable is considered so that the connection point of the shield layer is 1 point, and the jumper cable must be constructed into a vehicle so that the direction of the vehicle does not change, which is inconvenient in the operation surface. Therefore, the shielding layer is often used without being connected to any place (not grounded), and there is a problem that the shielding effect of the shielding layer cannot be sufficiently exhibited.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a train information transmission/reception system that can be used in an environment with large external noise without restricting the assembly and operation of a vehicle, and can transmit information at a higher speed than in the conventional system without newly developing a jumper cable for a vehicle jumper cable.

To solve the above problems and achieve the above object, the present invention includes: information transmitting/receiving devices mounted on a plurality of vehicles constituting a train, respectively, and performing train information processing in cooperation with each other; first and second vehicle-side connectors provided at both ends of each of the vehicles, respectively, and each having a ground terminal grounded to the vehicle and a plurality of signal transmission line terminals; first and second in-vehicle wiring cables each having a plurality of signal transmission lines connected to the plurality of signal transmission line terminals of the first and second vehicle-side connectors and the information transmitting/receiving device, and a shielding layer that is grounded to the vehicle and shields the plurality of signal transmission lines; and a vehicle jumper cable having first and second jumper connectors each having a jumper ground terminal and a plurality of jumper signal path terminals which are fitted to the ground terminal and the signal transmission line terminals of the first and second vehicle-side connectors, respectively, and mounted on both end portions thereof, the vehicle jumper cable having a plurality of jumper signal transmission lines which connect the plurality of jumper signal transmission line terminals of the first and second jumper connectors to each other, and a single shielding layer which surrounds and shields the entire plurality of jumper signal transmission lines and is connected to only one of the jumper ground terminals of the first and second jumper connectors, wherein the first jumper connector which connects the first vehicle-side of one vehicle to the vehicle jumper cable and the second jumper connector which connects the second vehicle-side connector of the other vehicle to the vehicle jumper cable are connected to each other, a transmission line between adjacent vehicles is formed.

The train information transmitting/receiving system of the present invention can be used even in an environment with large external noise without restricting the operation of the vehicle, and can transmit information at a higher speed than in the conventional one without newly developing a jumper cable for a vehicle jumper cable. In addition, when there is a potential difference between adjacent vehicles, a jumper cable using a normal shielded cable without using a special cable can provide a shielding effect even if the direction of connection is not recognized, and can exhibit an effect of preventing current from flowing through the shield due to the potential difference and blowing.

Drawings

Fig. 1 is a diagram showing a configuration of a typical train information transmission and reception system.

Fig. 2 is a diagram showing a configuration of a transmission line of the train information transmission/reception system.

Fig. 3 is a sectional view of the vehicle jumper cable of the embodiment.

Fig. 4 is a cross-sectional view of an unshielded wire.

Fig. 5 is a sectional view of the shielded electric wire.

Fig. 6 is a cross-sectional view of a shielded twisted pair wire.

Fig. 7 is a cross-sectional view of a shielded twisted pair wire.

Fig. 8 is a diagram showing a general train information transmission/reception system.

Fig. 9 is a diagram showing a general train information transmission/reception system.

Fig. 10 is a diagram showing a general train information transmission/reception system.

Fig. 11 is a diagram showing a general train information transmission/reception system.

Fig. 12 is a diagram showing a general train information transmission/reception system.

Fig. 13 is a diagram showing an embodiment of a train information transmission/reception system according to the present invention.

Fig. 14 is a diagram showing an embodiment of a train information transmission/reception system according to the present invention.

Description of the reference numerals

10 … information transceiver; 11 … transmission line; 21 … a first in-vehicle wiring cable (comprising twisted pair electrical wires); 21a … first vehicle side connector; 21b … ground terminal; 21c … signal transmission line terminal; 22 … second in-vehicle wiring cable (including twisted pair wire); 22a … second vehicle-side connector; 22b … ground terminal; 22c … signaling line terminals; 24. 39, 84 … wrapping (protective covering); 25. 35, 85 … wires; 26. 36, 86 … shield layer (shielding layer); 27. 37, 38, 87 … insulating layers; 32 … unshielded wires; 33 … shielded electrical wires; 60 … vehicle jumper cables; 61 … first crossover connector; 61b … is connected across the ground terminal; 61c … across the signal transmission line terminals; 62 … second jumper connector; 62b … is connected across the ground terminal; 62c … across the signaling line terminals; 80 … shielded twisted pair wire; 100 … shield ground wires; 101 … vehicle body; 200 … train; 201 … vehicle; 205 … train information transceiver system.

Detailed Description

Hereinafter, embodiments of the train information transmission and reception system according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

Detailed description of the preferred embodiments

Fig. 1 is a diagram showing a schematic configuration of a typical train information transmission/reception system; fig. 2 is a diagram showing a configuration of a transmission line of the train information transmission/reception system.

As shown in fig. 1, each vehicle 201 of a train 200 mounts an information transmitting/receiving device 10, and the information transmitting/receiving devices 10 mounted on adjacent vehicles 201, 201 are connected to each other via a transmission line 11.

As shown in fig. 2, the transmission line 11 is connected to the first in-vehicle wiring cable 21, the first vehicle-side connector 21a, the first jumper connector 61, the vehicle jumper cable 60, the second jumper connector 62, the second vehicle-side connector 22a, and the second in-vehicle wiring cable 22.

The information transmission/reception device 10 is connected to the information transmission/reception device 10 connected to and mounted on an adjacent vehicle via the first in-vehicle wiring cable 21, the first vehicle-side connector 21a, the first jumper connector 61, the vehicle jumper cable 60, the second jumper connector 62, the second vehicle-side connector 22a, and the second in-vehicle wiring cable 22.

The first vehicle-side connector 21a is provided at a front-side end portion of the vehicle, and the second vehicle-side connector 22a is provided at a rear-side end portion. The first and second jumper connectors 61 and 62 are mounted on the vehicle jumper cable 60. One of the first and second jumper connectors 61 and 62 is fitted to the first vehicle-side connector 21a, and the other is fitted to the second vehicle-side connector 22a, and connects the first vehicle inner wiring cable 21, the vehicle jumper cable 60, and the second vehicle inner wiring cable 22.

Fig. 3 is a sectional view of the vehicle jumper cable 60 of the embodiment. The vehicle jumper cable 60 is a jumper cable obtained by bundling a plurality of cables. The vehicle jumper cable 60 is formed by twisting a plurality of shielded twisted pair (twist pair) wires 80, a plurality of shielded wires 33, and a plurality of unshielded wires 32 in a bundle, and then covering them with a covering (protective covering) 34.

The number of the vehicle jumper wires, the arrangement of the wires, and the wire diameter are variously practiced, and the vehicle jumper cable of the present invention is not limited to the vehicle jumper cable 60 of the embodiment.

Fig. 4 is a cross-sectional view of an unshielded wire. The unshielded wire 32 is formed by coating a wire 35 with a cylindrical insulating layer 37.

Fig. 5 is a sectional view of the shielded electric wire. The shielded wire 33 has a structure in which the wire 35 is covered with a cylindrical insulating layer 38, the insulating layer 38 is covered with a shield layer (shielding layer) 36 formed by braiding copper wires or the like into a cylindrical shape, and the shield layer 36 is further covered with a cylindrical insulating layer 39.

Fig. 6 is a cross-sectional view of a shielded twisted pair wire. The twisted pair electric wire 80 has a structure in which two insulated electric wires, i.e., wires 85 and 85 as a jumper signal transmission line, covered with cylindrical insulating layers 87 and 87 are twisted, the periphery thereof is covered with a shield layer 86, and the periphery thereof is covered with a sheath (protective cover).

Since a jumper cable used for the vehicle jumper cable 60 for direct inter-vehicle jumper has a high mechanical strength, the hard copper wire is placed in the center of the electric wire 35, 85 in the jumper cable, and the soft copper wire is twisted around the hard copper wire to form the electric wire 35, 85.

Fig. 7 shows a cross section of a shielded twisted pair electric wire used as the first and second vehicle interior wiring cables 21 and 22, in which two insulated electric wires, each of which is formed by coating a cylindrical insulating layer 27 and 27 around the electric wires 25 and 25, are twisted and the periphery thereof is coated with a shielding layer 26, and the periphery thereof is coated with a covering (protective coating) 24.

Shielded cables are typically noisy on the outside. On the other hand, various high-voltage or high-frequency electric devices are mounted on a train, and noise is often generated. Thus, the shielded first and second in-vehicle wiring cables 21, 22 shown in fig. 7 are used as transmission lines in the vehicle. In the inter-vehicle jumper section, shielded twisted pair electric wires 80 are selected from electric wires constituting the inter-vehicle jumper cable 60 and used as transmission lines.

Fig. 8 to 12 are schematic diagrams showing a general train information transmitting and receiving system.

In the train information transmission/reception system shown in fig. 8, the first and second vehicle-side connectors 21a and 22a have respective ground terminals 21b and 22b that are grounded to the vehicle bodies 101 and 101 of the vehicles 201 and 201 via the shielded ground lines 100 and 100, and respective 2 (a plurality of) signal transmission line terminals 21c and 22 c.

The first and second vehicle interior wiring lines 21 and 22 include a plurality of signal transmission lines (electric wires) 25 and 25 connected to the information transmitting/receiving device 10 and the 2 (a plurality of) signal transmission line terminals 21c and 22c of the first and second vehicle side connectors 21a and 22a, respectively, and shield layers 26 and 26 for shielding the plurality of signal transmission lines 25 and 25 grounded to the vehicle bodies 101 and 101 of the vehicles 201 and 201.

First and second jumper connectors 61 and 62 each having a jumper ground terminal 61b and 62b and a plurality of jumper signal transmission line terminals 61c and 62c that can be fitted to the ground terminals 21b and 22b and the plurality of signal transmission line terminals 21c and 22c of the first and second vehicle-side connectors 21a and 22a, respectively, are attached to both end portions of the vehicle jumper cable 60a, and the vehicle jumper cable 60a includes a twisted pair electric wire 80, and the twisted pair electric wire 80 includes: a plurality of jumper signal transmission lines 85, 85 connecting the plurality of jumper signal transmission line terminals 61c, 62c of the first, second jumper connectors 61, 62 to each other, and a shield layer 86 shielding the plurality of jumper signal transmission lines 85, 85 and connected to both the first, second jumper connectors 61, 62.

That is, in the train information transmission/reception system shown in fig. 8, at 2 locations on both ends of the shielded twisted pair electric wire 80 of the vehicle jumper cable 60a, the shield layer 86 is grounded to the vehicle bodies 101, 101 via the jumper ground terminals 61b, 62b of the first and second jumper connectors 61, 62, the ground terminals 21b, 22b of the first and second vehicle-side connectors 21a, 22a, and the shield ground lines 100, 100.

In the train information transmission/reception system shown in fig. 8, there is a risk that a large amount of current flows through the shield layer 86 and blows out in a railway vehicle in which the potential of the vehicle body is not constant depending on the location.

In the train information transmission/reception system shown in fig. 9, the shield layer 86 is grounded to the vehicle body 101 via the jumper ground terminal 61b of the first jumper connector 61, the ground terminal 21b of the first vehicle-side connector 21a, and the shield ground line 100 only at 1 position on one side of the shielded twisted pair electric wire 80 of the vehicle jumper cable 60.

Fig. 10 shows a state in which the vehicle jumper cable 60 is connected in a reverse direction to the connection state shown in fig. 9, in which neither side of the shield layer 86 is grounded to the vehicle body 101.

In the connected state shown in fig. 10, the shielding layer 86 of the vehicle jumper cable 60 is not grounded, so that the external noise shielding effect is poor. In the train information transmission/reception system shown in fig. 9, if the direction of the vehicle 201 changes, the connection state shown in fig. 11 is achieved, and the external noise shielding effect is poor in the connection state shown in fig. 11 as well as in the connection state shown in fig. 10.

In order to secure the ground contact state shown in fig. 9 and obtain a sufficient external noise shielding effect, it is necessary to couple the vehicle 201 in consideration of not only the direction of the vehicle jumper cable 60 but also the direction of the vehicle 201.

In the train information transmission/reception system shown in fig. 12, the shield layer 86 of the shielded twisted pair electric wire 80 of the vehicle jumper cable 60b is not grounded to the vehicle body. Since the same connection state is maintained even when the direction of the vehicle jumper cable 60b and the direction of the vehicle 201 change, it is not necessary to consider the directions of the vehicle jumper cable 60b and the vehicle 201 when the train 200 is coupled and used, but the connection state shown in fig. 10 and 11 is the same in that a sufficient external noise shielding effect cannot be obtained.

Fig. 13 and 14 are diagrams showing an embodiment of a train information transmission/reception system 205 according to the present invention. As shown in fig. 13, the first and second vehicle-side connectors 21a and 22a provided at both end portions of the respective vehicles 201 and 201 have respective ground terminals 21b and 22b that are grounded to the vehicle bodies 101 and 101 of the vehicles 201 and 201 via the shielded ground lines 100 and 100, and respective 2 (a plurality of) signal transmission line terminals 21c and 22 c.

The first and second in-vehicle wiring cables 21 and 22 include shield layers 26 and 26, and the shield layers 26 and 26 shield the plurality of signal transmission lines 25 and 25 connected to the information transmitting and receiving device 10 and the two (a plurality of) signal transmission line terminals 21c and 22c of the first and second vehicle-side connectors 21a and 22a, respectively, and the plurality of signal transmission lines 25 and 25 grounded to the vehicle bodies 101 and 101 of the vehicles 201 and 201.

The vehicle jumper cable 60 is mounted with first and second jumper connectors 61 and 62 having jumper ground terminals 61b and 62b and a plurality of jumper signal transmission line terminals 61c and 62c that can be fitted to the ground terminals 21b and 22b and the plurality of signal transmission line terminals 21c and 22c of the first and second vehicle side connectors 21a and 22a, respectively, at both ends, and the vehicle jumper cable 60 includes a twisted pair electric wire 80, and the twisted pair electric wire 80 includes: a plurality of jumper signal transmission lines 85, 85 connecting the plurality of jumper signal transmission line terminals 61c, 62c of the first and second jumper connectors 61, 62 to each other, and a shield layer 86 shielding the plurality of jumper signal transmission lines 85, 85 and connected to only one of the jumper ground terminals 61b, 62b of the first and second jumper connectors 61, 62.

That is, in the train information transmission/reception system 205 according to the embodiment shown in fig. 13, the shield layer 86 of the twisted pair electric wire 80 is connected to the cross ground terminal 61b of one (first) cross connector 61 of the vehicle cross connector 60, and is not connected to the cross ground terminal 62b of the other (second) cross connector 62.

On the other hand, on the vehicle 201 or 201 side, the shielded ground lines 100 or 100 grounded to the vehicle bodies 101 or 101 are connected to the ground terminals 21b or 22b of the vehicle-side connectors 21a or 22a, respectively. In this state, when the first and second jumper connectors 61 and 62 of the vehicle jumper cable 60 are connected to the first and second vehicle-side connectors 21a and 22a, respectively, the shield layer 86 is connected to only one of the vehicle bodies 101.

Fig. 14 shows a state in which the vehicle jumper cable 60 is connected in a reverse direction to the connection state shown in fig. 13, and in this state, the shield layer 86 is also connected to only one vehicle body 101. In this way, the shield layer 86 of the vehicle jumper cable 60 can be grounded to only one vehicle body 101 regardless of the directions of the vehicle jumper cable 60 and the vehicles 201 and 201.

Further, as the jumper signal transmission line of the vehicle jumper cable 60, a plurality of shield electric wires 33 may be used instead of the twisted pair electric wires 80.

According to the train information transmission/reception system 205 of the embodiment, when the information transmission/reception devices 10 and 10 mounted on the respective vehicles 201 and 201 transmit information to each other via the vehicle jumper cable 60, even if the direction of the vehicle jumper cable 60 and the directions of the vehicles 201 and 201 are not considered, the external noise shielding effect can be sufficiently ensured, and information transmission at a higher speed than in the conventional art can be performed.

Possibility of industrial utilization

As described above, the train information transmission/reception system according to the present invention is useful as a train information transmission/reception system for a train in which vehicles are converted.

Claims (1)

1. A train information transmission/reception system, comprising:

an information transmitting/receiving device mounted on each of a plurality of vehicles constituting a train and performing train information processing in cooperation with each other;

first and second vehicle-side connectors provided at both ends of each of the vehicles, respectively, and each having a ground terminal grounded to the vehicle and a plurality of signal transmission line terminals;

first and second in-vehicle wiring cables each having a plurality of signal transmission lines connected to the plurality of signal transmission line terminals of the first and second vehicle-side connectors and the information transmitting/receiving device, and a shielding layer that is grounded to the vehicle and shields the plurality of signal transmission lines; and

a vehicle jumper cable having first and second jumper connectors each having a jumper ground terminal and a plurality of jumper signal transmission line terminals that can be fitted to the ground terminal and the signal transmission line terminals of the first and second vehicle-side connectors, respectively, and mounted on both end portions of the vehicle jumper cable, the vehicle jumper cable having a plurality of jumper signal transmission lines that connect the jumper signal transmission line terminals of the first and second jumper connectors to each other, and a single shielding layer that surrounds the entire jumper signal transmission lines, shields the jumper signal transmission lines, and connects only one of the jumper ground terminals of the first and second jumper connectors,

the first vehicle-side connector connecting the adjacent one of the vehicles and the first jumper connector of the vehicle jumper cable, and the second vehicle-side connector connecting the adjacent other of the vehicles and the second jumper connector of the vehicle jumper cable constitute a transmission line between the adjacent vehicles.

2. The train information transmission/reception system according to claim 1, wherein:

the first and second in-vehicle wiring cables and the vehicle jumper cable have twisted pair electric wires as signal transmission lines.