JP3330023B2 - Train information transmission device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a train information transmission apparatus for transmitting train information using a light beam signal.

[0002]

2. Description of the Related Art Conventionally, wired data transmission is used between an operation management center for managing train operation and each station, and train radio using space waves or the like is used between the operation management center and the train. .

[0003] In the Shinkansen, a leaky coaxial cable (LCX cable) is installed along a line to transmit information between ground vehicles by high-frequency radio.

Further, in some subways where one-man operation is performed, a video signal of a surveillance camera installed on the platform is transmitted to the train so that the train driver can confirm the safety of the user on the platform and monitor the cab. It is projected on a TV so that it can be checked. In this case, in order to transmit a video signal from the platform to the train, an optical transmission device that converts a video signal into a light beam signal and transmits the light signal to a light receiver on the vehicle from the light emitter on the ground is used.

In the case of a double track, when a train running on one track derails and interferes with the other track, the train running on the other track is notified and a collision occurs. In order to prevent accidents, a limit obstacle detection device is installed. This limit obstruction detection device installs a wire at an intermediate position between the upper and lower lines, detects that a derailed train has violated the limit due to the current flowing through the wire when it touches the wire, and limits the signal. The system determines that a problem has occurred and notifies the train running on the opposing line.

[0006]

The train information transmitting apparatus according to the present invention replaces such a conventional train information transmitting apparatus.
It is an object of the present invention to enable communication between an operation management center and each station, communication between ground vehicles, and detection of a limit obstacle using light beam communication means.

Another object of the present invention is to provide a train information transmission apparatus which can transmit a large amount of data by using light beam communication means and can transmit data, voice and video information.

[0008]

A train information transmitting apparatus according to the first aspect of the present invention comprises: a light beam signal projector and a light receiver installed along a track and between upper and lower tracks of a multi-track; A light beam communication terminal that is installed and performs light beam communication with each other through the light projector and the light receiver; and connects the light beam communication terminals located at both ends so that signals can be transmitted between the light beam communication terminals and a loop transmission path. And end-of-end communication means which is installed in the light beam communication terminal, and performs limit obstacle detection when the light receiver does not receive a light beam signal.

In the train information transmitting apparatus according to the first aspect of the present invention, a plurality of stations and, if necessary, a light beam communication terminal installed at an appropriate position between the stations allows one light emitter to be opposed to a light receiver. Light beam signals are sequentially transmitted, and between the optical communication terminals at both ends, signal transmission is performed by end-to-end communication means, thereby performing loop transmission of train information. Therefore, using the light beam communication technology, a large amount of information can be transmitted between the operation management center and each station and between the stations. In addition, by installing the light emitter and the light receiver between the upper and lower lines of the double track, and by providing the light beam communication terminal with a limit obstacle detection means for detecting the limit obstacle when the light receiver does not receive the light beam signal, Using the train information transmission system, it is also possible to perform marginal obstacle detection.

A train information transmitting apparatus according to a second aspect of the present invention comprises: a light beam signal projector and a light receiver installed on a car;
Along the track, and the light beam signal transmitter and receiver installed between the upper and lower lines of the multiple tracks, and installed at each of a plurality of stations,
A light beam communication terminal that performs light beam communication with each other through the light emitter and the light receiver, and among the light beam communication terminals,
End-to-end communication means forming a loop transmission path, and being connected to the light beam communication terminal, so that the light receiver can no longer receive the light beam signal. And a marginal obstacle detecting means for occasionally detecting a marginal obstacle.

In the train information transmission apparatus according to the second aspect of the present invention, in addition to the information communication between the operation management center and each station or between the stations, the train information transmission apparatus further includes a communication between the operation management center and the train on the track, and Information communication can be performed between the train and the train using the light beam signal. Therefore, it is possible to transmit multimedia information such as video information, weather forecast, advertisement guidance, news information, and telephone signals to a train by using the light beam communication technology.

In addition, in the train information transmitting apparatus according to the second aspect of the present invention, the light transmitter and the light receiver are installed between the upper and lower lines of the double track, and the limit failure is detected when the light receiver does not receive the light beam signal. By providing the limit obstacle detecting means in the light beam communication terminal, the limit obstacle can be detected using the train information transmission system.

According to a third aspect of the present invention, in the train information transmission apparatus of the first or second aspect, the loop transmission line has a loopback function, whereby a failure occurs in one of the light beam communication sections. , The train information transmission can be continued, and the reliability of the light beam communication can be kept high.

According to a fourth aspect of the present invention, in the train information transmitting apparatus of the first to third aspects, the wavelengths of the light beam signals are made different in adjacent communication sections, whereby one light projector can be used as an original counterpart. It is possible to prevent a light beam signal received by a light receiver located one position ahead of the light receiver to be performed, and to improve the reliability of light beam communication.

According to a fifth aspect of the present invention, in the train information transmission apparatus of the first or second aspect, the light beam communication terminal is installed between the stations, and when the distance between stations is long or the track is curved. Light beam communication can be performed without any problem even if the user is present.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an entire system according to an embodiment of the present invention, in which a number of stations A1, A2,... Are installed on a certain train line 1, and light beam communication devices B1, B2 are provided between these stations. B2, ..., and terminal station A
1 and An are connected by microwave communication devices C1 and Cn, and a loop transmission path D is formed by light beam communication and microwave communication as a whole. ANT is a microwave antenna. In place of the microwave communication devices C1 and Cn, an optical fiber cable may be used to connect the microwave communication devices C1 and Cn, or an optical communication system may be used.

Each of the light beam communication devices B1, B2,... Has a loopback function, and a certain light beam communication device B2.
When the transmission fails between the light beam communication devices B1 and B3 and the light beam communication device B2 before and after the light beam communication device B2 fails, the light beam communication devices B1 and B3 immediately before and after the failed light beam communication device B2 Each of them determines that a failure has occurred in the adjacent light beam communication device B2. If the left-hand solid arrow in FIG. 1 is the normal direction, the upstream light beam communication device B1 automatically performs communication in the opposite direction to the previous communication direction, that is, in FIG. The communication is continued after switching.

Each of the light beam communication devices B1, B2,... Has an internal configuration shown in FIG. Here, the operation management center is A3
Assume that the light beam communication device B3 at the station A3 is different from the light beam communication devices B1, B2, B4,... Installed at the other stations A1, A2, A4,. It is.

First, the station A where the operation control center is installed
The light beam communication apparatus B3 will now be described. The center control unit 11 is a computer for performing operation management and managing the light beam communication LAN, a LAN terminal station 12 for performing light beam communication control, and an optical communication LAN. A LAN monitoring unit 13 for monitoring the status of the light, a light transmitter 14 and a light receiver 15 for transmitting and receiving a light beam signal in the LAN terminal 12.
The spare light emitter 16 and the spare light receiver 1 for loopback
7 is provided.

The projector 14 is connected to the LAN from the center controller 11.
The electric signal of the train communication information output through the terminal station 12 is converted into a light beam signal 18 having a predetermined wavelength and radiated toward the opposing light receiver 22 on the downstream side (right side in FIG. 2). Is an opposing projector 2 on the upstream side (left side in FIG. 2)
1 functions to receive a light beam signal 18 radiated from 1 and convert it into an electric signal to output to the LAN terminal 12. At the time of loopback, the transmission direction is reversed, but in the same manner, the light beam signal 18 ′ is radiated from the preliminary light emitter 16 toward the downstream (leftward in FIG. 2) opposing auxiliary light receiver 24. The spare photodetector 17 is on the upstream side (right side in FIG. 2)
, And receives a light beam signal emitted from the opposing auxiliary light emitter 23.

Light beam communication devices B1, B2, B4,... Installed at general stations A1, A2, A4,.
Is a LAN terminal station 25 of the optical beam communication LAN, a train information transmission device 26 for transmitting train information, a station LAN 27,
It is connected to this station LAN 27,
An input / output device 2 for controlling lighting and other equipment and for controlling input / output of signals with a station control unit 28 for controlling an interlocking device.
9 is provided.

Light beam communication devices B1, B2, B at each station
Are connected to the train information transmission device 26,
A train-to-train floodlight 210 that emits a light beam signal of train-to-train information for a train running nearby, and a train-to-train light receiver 211 that receives a light beam signal emitted from the train,
Further, a spare anti-train light emitter 212 and a spare anti-train light receiver 213 are also provided for standby during loopback.

As shown in FIG. 3, the light beam communication devices B1, B2, B4,..., The light projector 21, the light receiver 22, the spare light projector 23, the spare light receiver 24,
Further, the floodlight 210, the light receiver 211, the spare light emitter 212, and the spare light receiver 213 for the train are all installed at an intermediate position between the up line 1U and the down line 1D, and the up line 1U
The light beam signal 18 is cut off when the train 3 is derailed and protrudes to the opposing line 3D side.

As shown in FIG. 3, the on-board device of the train 3 is provided with light emitting and receiving devices 4 and 5 at the front and rear portions of the train, respectively, and processes received information obtained by demodulating a light beam signal. And an on-board control unit 6 for controlling various facilities;
5, transmission control units 7 and 8 for performing signal transmission / reception control.

Further, if the distance between the adjacent stations is long or the track is curved, the attenuation of the light beam is prevented, and the repeater is located at an appropriate intermediate position so that the light beam signal 18 can be correctly transmitted to the adjacent station. 9 to install the light beam signal 18
To amplify.

Next, the operation of the train information transmission device having the above configuration will be described. As shown in FIG. 4, between adjacent light beam communication devices Bi and Bi + 1, and between light beam communication devices Bi +
By using light beam signals of different wavelengths f1A and f1B between 1 and Bi + 2, a certain light beam communication device Bi is used.
Light beam communication device B which is one light beam communication device Bi + 1 from which the light beam signal radiated from
The setting is made so that the light beam communication device Bi + 2 is not erroneously received when the light beam reaches i + 2. Also, the wavelength of the train light beam signal 19 is radiated from the train projector 210 toward the train 3, and the wavelength f2A of the light beam received by the on-vehicle projector 5 and the light emitter / receiver 4 of the train 3.
Is set so as to be different from the wavelength f2B of the light beam radiated toward the light beam communication device in front from.

Further, the train light emitter 210 and the train light receiver 2
11 is installed along the track 1U similarly to the projector 21 and the receiver 22 for communication between adjacent stations, but since the train 3 moves on the track 1U, the on-vehicle projectors 4 and 5 and the train Although the angle of the line connecting the light emitter / receiver 210 and 211 changes, the light beam signal 19 for trains must have directivity so that the light beam signal 19 can be transmitted and received even if there is such a change. Slightly wider.

Center control unit 1 of train operation management center B3
At 1, a schedule management, a train line status management, a weather forecast, news information, and an advertisement guide information are edited, and various kinds of information are digitized and instructed to be transmitted to the LAN terminal 12. The information received from each station and train is received through 12 and arithmetic processing is performed.

The LAN terminal 12 gives the transmission information signal received from the center control unit 11 to the light projector 14,
Then, this is converted into a light beam signal 18 of a predetermined wavelength and emitted.

At the station B4 adjacent to the operation control center B3, the light beam signal 18 radiated from the light projector 14 is received by the light receiver 22 and reconverted into an electric signal.
Then, the received information is analyzed and passed to the station control unit 28 to execute a train operation control operation such as a change in the display content of the guidance display panel, control of various facilities, and control of an interlocking device.

When the LAN terminal station 25 receives the train information, the LAN terminal 25 passes the train information to the train information transmitting device 26, modulates the train information into a communication signal, and passes it to the train floodlight 210. Here, the light beam signal 19 is converted into a light beam signal 19 having a predetermined wavelength, and is radiated toward the running train 3.

The running train 3 receives the light beam signal 19 with the light emitter / receiver 5 and converts it into an electric signal.
The demodulated signal is given to the on-vehicle control unit 6, and the on-vehicle control unit 6 uses the received information for driving control, displays the information on the in-vehicle guidance device, and transmits a telephone signal to the telephone, and furthermore, a monitor television. On the display so that the driver can confirm it.

If it is necessary to transmit a telephone signal from the train 3 or to transmit fault or abnormal information, the on-board controller 6 passes the information to a transmission controller 7, which modulates the information into a communication signal and converts the information into a communication signal. The light is output to the upper light emitting / receiving device 4 and converted into a light beam signal 19 having a predetermined wavelength, which is radiated toward the front light beam communication device Bi.

Now, for example, the light beam communication device B
If the train 3 derails and blocks the light beam signal 18 in the section between i and Bi + 1, the light beam signal 18 is transmitted to the downstream light beam communication device Bi + 1 that should receive the light beam signal 18. The LAN terminal 25 detects that the light beam signal 18 has stopped receiving light, determines that a limit failure has occurred, starts a loopback operation, and adds an abnormality occurrence signal to the loopback light beam signal 18 '. The operation management center B3 receives the abnormality occurrence signal, identifies which light beam communication device has issued the signal, and specifies the abnormality occurrence section.

Then, the abnormality occurrence information is transmitted to the light beam signal 1.
8. Transmit on the loopback light beam signal 18 '
Anomaly occurrence information is reported to each of the light beam communication devices Bi and Bi + 1 immediately before the anomaly occurrence section. As a result, the light beam communication devices Bi and Bi + 1 notify the abnormal occurrence of the latest train to the light beam signal 19 and the loopback light beam signal 1.
Inform 9 'to ensure safety.

Referring to the schematic diagram of FIG. 5, the light beam signal 18 is now transmitted between the repeater 923 and the station A3.
Is turned off, the light beam signal 18
The light beam signal 18 is no longer received by the light beam communication device B3 of the station A3 on the downstream side where the signal is to be received, and the LAN terminal 25 of B3 detects the stop of the light beam signal 18 and determines that a limit failure has occurred. Then, a loopback operation is started, and an abnormality occurrence signal is added to the loopback light beam signal and transmitted in the opposite direction. The operation management center B4 receives this abnormality occurrence signal and issues it from any light beam communication device. Identify whether the error occurred, and identify the abnormality occurrence section.

Then, the light beam signal 18 in the same direction as before and the light beam signal 18 'in the loopback direction are transmitted with the abnormality occurrence information, and transmitted to the light beam communication device B3 and the repeater 923 before and after the abnormality occurrence section. Report to. Upon receiving the abnormality occurrence information, each of the light beam communication devices B1, B2, B
3, and the repeaters 912 and 923 are connected to the train light beam signal 19,
Call 19 'to notify the train running nearby that an abnormality has occurred, and call for safety assurance.

In the above embodiment, the communication between the ground vehicles is also performed by the light beam signal. However, a high frequency such as a millimeter wave may be used, and the system configuration must be simplified. If there is, communication between ground and on-vehicles may have the same configuration as in the past.

[0039]

As described above, according to the first aspect of the present invention,
A light beam communication terminal installed at an appropriate place between a plurality of stations and, if necessary, between stations sequentially transmits a light beam signal from one light emitter to an opposite light receiver, and between the optical communication terminals at both ends. Because the loop transmission of train information is performed by transmitting signals by end-to-end communication means, large-capacity transmission between the operation management center and each station and between stations using light beam communication technology Information can be transmitted, and equipment costs can be kept lower than when laying cables along the line or laying optical fiber cables for information communication, and light beam communication enables wideband information transmission. Therefore, information such as video and audio can be transmitted together with the control signal, and a wide range of information can be transmitted by one transmission system. In addition, the light beam transmitter and receiver are installed between the upper and lower lines of the double track, and the light beam communication terminal is provided with a limit trouble detecting means for detecting the limit trouble when the light receiver does not receive the light beam signal. Using the information transmission system, it is also possible to perform marginal obstacle detection.

According to the second aspect of the present invention, in addition to the information communication between the operation management center and each station or between the stations, the communication between the operation management center and the train on the track, and between the station and the train. Since information communication can be performed using a light beam signal between the devices, multimedia information such as video information, weather forecast, advertisement guidance, and news information can be transmitted to a train by using the light beam communication technology.

According to the second aspect of the present invention, there is further provided a limit obstacle detecting means for installing a light emitter and a light receiver between upper and lower lines of a multiple line and detecting a limit obstacle when the light receiver does not receive a light beam signal. Since it is provided in the light beam communication terminal, it is possible to detect a limit failure using the train information transmission system.

According to the third aspect of the present invention, since the loop transmission path has a loopback function, train information transmission can be continued even if a failure occurs in any of the light beam communication sections, The reliability of light beam communication can be kept high.

According to the fourth aspect of the present invention, the wavelength of the light beam signal is made different between adjacent communication sections, so that the light beam signal is transmitted from one light emitter to the light receiver located one position ahead of the light receiver that is originally opposed. Can be prevented from being received, and the reliability of light beam communication can be improved.

According to the fifth aspect of the present invention, since the light beam terminal is installed between the stations, the light beam communication can be reliably performed even when the distance between the stations is long or the track is curved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system configuration according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an internal configuration of the light beam communication device according to the embodiment.

FIG. 3 is an explanatory diagram showing a light beam communication operation between the light beam communication device and the repeater and between the light beam communication device and the train according to the embodiment.

FIG. 4 is an explanatory diagram showing a wavelength of a light beam signal used in the embodiment.

FIG. 5 is an explanatory diagram showing a loopback operation of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Track 1U Up line 1D Down line 3 Train 4 On-board light emitting / receiving device 5 On-board light emitting / receiving device 6 Transmission control unit 7 Transmission control unit 8 On-board control unit 9 Repeaters 912, 923 Repeater 11 Center control unit 12 LAN end Station 13 LAN monitoring unit 14 light emitter 15 light receiver 16 spare light emitter 17 spare light receiver 18, 18 'light beam signal 19, 19' (for train) light beam signal 21 light emitter 22 light receiver 23 spare light emitter 24 spare light receiver 25 LAN end Station 26 train information transmission device 27 station LAN 28 station control unit 29 input / output device 210 train light emitter 211 train light receiver 212 spare train light emitter 213 spare train light receiver A1, A2, A3, ... Station B1, B2, B3, ... Light beam communication device C1, Cn Microwave transmission device D Loop transmission line

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI H04L 12/42 Examiner Takahiko Toyama (56) References JP-A-58-40941 (JP, A) JP-A-4-129874 (JP) JP-A-4-345334 (JP, A) JP-A-3-133225 (JP, A) JP-A-59-111433 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB Name) H04B 10/00-10/28 H04L 12/42 B61L 1/00-29/32

Claims (5)

(57) [Claims] 1. A light beam signal projector and a light receiver installed along a track and between upper and lower lines of a multi-track, and installed at each of a plurality of stations to perform light beam communication with each other through the projector and the light receiver. A light beam communication terminal, end-to-end communication means for forming a loop transmission path by tying the light beam communication terminals between terminals located at both ends so as to be able to transmit signals, and installing the light beam communication terminal in the light beam communication terminal And a limit obstacle detecting means for detecting a limit obstacle when the light receiver stops receiving the light beam signal. 2. A plurality of stations each comprising: a light beam signal projector and a light receiver installed on a vehicle; a light beam signal projector and a light receiver installed along a track and between upper and lower lines of a multiple track; And a light beam communication terminal that performs light beam communication with each other through the light emitter and the light receiver, and among the light beam communication terminals, a signal transmission is performed between signals located at both ends, and loop transmission is performed. A train information transmission device comprising: end-to-end communication means for forming a road; and limit obstacle detection means installed in the light beam communication terminal and performing limit obstacle detection when the light receiver no longer receives a light beam signal. . 3. The train information transmission device according to claim 1, wherein the loop transmission line has a loopback function. 4. The apparatus according to claim 1, wherein the wavelength of the light beam signal is different between adjacent communication sections.
The train information transmission device according to any one of the above. 5. The train information transmission device according to claim 1, wherein the light beam communication terminal is installed between the stations.