JPS647708B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle information transmission device using optical fibers for transmitting and receiving various signals of a railway vehicle.

The train monitor device monitors the operating status of the entire train and the operation and status of each vehicle's main equipment, displays it on the driver's cab, provides information for the driver's decision-making, and assists in first aid operations. It is a device.
It also serves to check vehicle functionality and collect information for failure phenomenon analysis.

As shown in FIG. 1, this device consists of a monitor display 1 installed in the driver's cab, a monitor central device 2, a monitor terminal 3 placed in each vehicle T, and an information transmission cable 4 connecting these. The monitor central device 2 consists of three trays: an input/output section 5, and calculation sections 6 and 7. As shown in the figure, the monitor terminal 3
Information is exchanged through serial transmission.

The terminal device 3 of each vehicle T also has a modem 8 in the calculation section 7.
The same modem 9 is housed therein and performs information transmission with the monitor central unit 2.

Analog information such as motor current, brake pattern voltage, and brake pressure for each vehicle T,
Digital information such as the on/off operation status of the equipment and failure status is collected by the monitor terminal 3, and the information is transmitted from the modem 9 to the modem 8 via the transmission cable 4, and this information is primarily edited in the calculation unit 7. , is transmitted to the arithmetic unit 6, further edited, and output to the monitor display 1.

The above is an overview of the configuration and operation of a conventional train monitoring device. However, in the transmission method of this device, the transmission cable 4 must be routed all the way from the leading car to the trailing car of the train, so noise generated from other main circuit equipment, etc. It has the disadvantage that it is very susceptible to noise, and therefore the carrier frequency of the modem cannot be made very high, making it impossible to transmit high-speed, large-capacity information.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a vehicle information transmission device for use in a railway vehicle, which has excellent noise resistance and is capable of a high-speed, large-capacity information transmission path.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An information transmission device for a vehicle according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 3 shows a configuration diagram of an embodiment of a vehicle information transmission device according to the present invention. In FIG. 3, the same parts as in FIG. 1 are given the same reference numerals, and their explanations will be omitted. In FIG. 3, in place of the modems 8 and 9 shown in FIG. 1, a calculation section 7 and one transmission terminal 10 are provided for each terminal device 3. Each transmission terminal 10 has O/E converters 11 and 12 that convert optical signals into electrical signals, and E/O converters 13 and 14 that convert electrical signals into optical signals.
is provided. The transmission terminal 10 and each terminal device 3 provided in the calculation section 7 are connected by an optical fiber signal transmission line 17. This optical fiber signal transmission line 17 is for transmitting the transmission signal output from the calculation section 7 to each terminal device 3. Furthermore, the transmission terminal 10 and the terminal device 3 are connected by an optical fiber signal transmission line 17, which is a second signal transmission line. This optical fiber signal transmission path 17 is for transmitting digital information signals from each terminal device 3 to the monitor central device 2. An optical coupler 19 is used to connect the optical fiber between vehicles.

Next, the operation of the vehicle information transmission device having the above-described configuration will be explained. The monitor central device 2 sends a transmission signal to each information terminal 10 via an optical fiber signal transmission line 17. The transmission signal from the monitor central device 2 is input to the O/E converter 11, and the transmission signal transmitted as an optical signal is converted into an electric signal by the O/E converter 11. This electric signal is taken into the monitor terminal 3 and at the same time the E/O converter 1
3, the signal is converted into an optical signal again and output to the optical fiber signal transmission line 17. The optical signal, ie, the transmission signal, obtained by the E/O converter 13 is transmitted to the monitor terminal 13 of another vehicle.

The monitor terminal device 3 that receives the transmission signal from the monitor central device 2 outputs a digital information signal indicating the operating state of the vehicle to the monitor central device 2. When the monitor terminal 3 outputs a digital information signal to the monitor central device 2, the digital information signal output from the monitor terminal 3 is transmitted to the bypass switch and E/
The signal is converted into an optical signal via the O converter 14. E/
The optical signal obtained by the O converter 14 is sent to the monitor central device 2 via an optical fiber signal transmission line 17.

Also, regarding the monitor terminal 3 of other vehicles,
Its action is as described above.

Next, the information terminal 10 will be explained using the drawings. FIG. 2 shows a configuration diagram of an information terminal used in the vehicle information transmission device shown in FIG. 3. In FIG. 2, the same parts as those shown in FIG. 3 are designated by the same reference numerals, and their explanations will be omitted. 16 is a serial port that performs serial/parallel conversion of data. 18 is an external device used to actually supply data. 15 is external device 1
8 outputs a digital information signal to the monitor central device 2, the serial port 16 and the E/O converter 14 are connected, and the other vehicle monitor terminal device 3 outputs the digital information signal to the monitor central device 2. It is a bypass switch that connects the O/E converter 12 and the E/O converter 14 when performing this operation. O/E converter 1
The optical signal from the monitor central device 2 that is inputted by the optical fiber 1 is once converted into an electrical signal, and is taken into the input end of the serial port 16. At the same time, it is converted back into an optical signal by the E/O converter 13 and sent to the optical fiber 1.
7 and transmitted to other information terminals. On the other hand, optical signals from other information terminals that are input to the O/E converter 12 are also converted into electrical signals once here, but when the bypass switch 15 is in the bypass position (the left position in the figure), The E/O converter 14 then converts the signal into an optical signal, outputs it to the optical fiber 17, and transmits it to another information terminal or monitor central device 2.
When the bypass switch 15 is in the transmitting position (the right position in the figure), the signal input to the O/E converter 12 is cut off, and the digital information signal output from the output end of the serial port 16 is input to the E/E converter instead. The signal is converted into an optical signal by the O converter 14 and output to the optical fiber 17. Bypass switch 1
The switching of 5 is performed by a transmission request signal given from the serial port 16.

Therefore, in the case of FIG. 3, the transmission data from the calculation unit 7 is simultaneously sent to each terminal device 3 in parallel,
Since the transmission from the terminal device 3 to the arithmetic unit 7 is always carried out on a one-to-one basis, no problems occur in the transmission procedure, as in the modem system shown in FIG.

As explained above, according to the present invention, it is possible to provide a high-speed, large-capacity information transmission device for a railway vehicle that is not affected by electromagnetic noise. In addition, when passing between vehicles using an optical coupler, there is a loss of 1 to 2 dB at the optical connector, but since each vehicle converts it into electricity and then back into an optical signal, the above losses do not accumulate. The performance required of the optical coupler is easy, and there are no constraints from the growth of the train. Furthermore, since a modem is not required in terms of the hardware configuration, the external weight does not increase even if an optical transmission terminal is added.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of a conventional vehicle information transmission device.
FIGS. 2 and 3 are configuration diagrams of an embodiment to which the present invention is applied. 2...Monitor central device, 3...Monitor terminal device, 10
...Information transmission terminal, 11, 12...O/E converter, 13, 14...E/O converter, 15...Bypass switch.

Claims (1)

[Scope of Claims] 1. A plurality of monitor terminals installed in each vehicle to collect digital information signals indicating the operating status of each vehicle; a monitor central device that outputs to the monitor terminal device via one signal transmission path; and an O/E converter and an E/O device provided in each of the plurality of monitor terminal devices and the monitor central device.
comprising a converter and a bypass switch, and switching the bypass switch when one monitor terminal outputs the digital information signal and when another monitor terminal outputs the digital information signal,
When the first monitor terminal outputs the digital information signal in response to the transmission request signal, the bypass switch and the E/O converter convert the digital information signal into an optical signal, and convert the optical signal into an optical signal. When inputting a digital information signal outputted to the monitor central device via the second signal transmission path and converted into an optical signal by the other monitor terminal device, this optical signal is input to the O/E converter. Therefore, the electrical signal is converted into an electrical signal, and this electrical signal is converted into an optical signal by the E/O converter via the bypass switch, and the optical signal is outputted to the monitor central device via the second signal transmission path. An information transmission device for a vehicle having an information terminal.