JPS6065636A - Optical transmitter for train - Google Patents

Abstract

PURPOSE:To preclude the possibility of electric leakage or electric shock or the like by multiplexing plural command signals of a train and transmitting the multiplexed result via an optical transmission line to decrease the number of interconnecting wires transmitting signals between car bodies. CONSTITUTION:An optical transmitter 6 is provided between a commanding device 3 of a head car body 1 and a device 4 to be commanded of an intermediate car body 2. The transmitter 6 consists of a transmitter 7 converting an electric command signal from the device 3 into a multiplexed optical signal and outputting the result, an optical transmission line 8 transmitting the multiplexed optical signal from the transmitter 7, and a receiver 9 converting again the multiplexed optical signal from the optical transmission line 8 into an electric command signal and outputting it to the device 4 to be commanded. Thus, the number of interconnecting wires for signal transmission between car bodies is decreased, no insulation is required, and the signal transmission with precluding the possibility of electric leakage or electric shock or the like and high reliability while forming an error of signal transmission is brought into fail safe is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a control device which is a commanded device mounted on a heavy vehicle. The present invention relates to a train optical transmission device that transmits command signals from a command device.

[Technical background of the invention]

In a train vehicle, command signals such as power, braking, coasting, etc. are sent from the master controller to the control device, and command signals are sent from various switches in the driver's cab to the tower-mounted equipment.

DC voltage +00 due to ω1 operation of relay contacts, switches, etc.
The electric signal of V is transmitted by a lead-in line between vehicles.

In other words, all command signals from the vehicle's command device to the commanded device a are transmitted by electrical signals via lead-in lines. Figure 1 is a block diagram showing the configuration of a conventional transmission device. The vehicle consists of a leading vehicle 1 and an intermediate vehicle 2 connected thereto.In the leading vehicle 1, a command device α3 consisting of a master controller and relays for various switches in the driver's cab is mounted, and in the intermediate vehicle 2, a command device α3 is mounted. A commanded device i#4 such as a control device, an ATS device, a brake device, etc. that operates based on commands from the device 3 is mounted.

The command device 3 and the commanded device 4 are connected by a lead-in line 5.

[Problems with background technology]

The transmission of the command signal via the lead wire @5 uses DC + (+Ov) in order to achieve the same noise resistance characteristics, so it is necessary to use a thick electric wire to increase the current capacity. The weight burden of a companion vehicle with many wires 5 becomes large, leading to a loss of running energy.Furthermore, if the signal wire interferes with other signal wires and transmits a wrong signal, the commanded device 4 may malfunction. It also results in

To avoid this, a method of transmitting the command signal by exciting it is also used, but the disadvantage is that when the 4piJ signal of DClooV is excited, the signal @ 0 power is large, and it becomes a noise source for other signals and devices. have. In addition, a number of lead-through lines 5 for transmitting such signals are installed inside the vehicle.
It is not practical to use as many as 00 lines.

[Purpose of the invention]

The purpose of this invention is to reduce the number of lead-through wires that transmit signals between vehicles, eliminate the need for insulation, reduce the risk of electrical leakage, electric shock, etc., and provide reliability with fail-safe protection against errors in signal transmission. Compact and I! which can perform high signal transmission. The purpose of the present invention is to provide optical transmission equipment for trains.

[Summary of the invention]

In order to achieve the above object in the present invention, there is provided a transmitter that converts an electrical command signal from a command device of a vehicle to a commanded device into a multiplexed optical signal and outputs the multiplexed optical signal, and a A train consisting of an optical transmission line that transmits multiplexed optical signals, and a receiver that reconverts the multiplexed optical signal from the optical transmission line into the electrical command signal and outputs it to the commanded device. It is characterized by configuring an optical transmission device.

[Embodiments of the invention]

The present invention will be explained in detail below based on embodiments shown in the drawings.

Is Figure 2 implemented according to this invention? 1, the same parts vc as shown in FIG. 1 are given the same reference numerals and their explanations will be omitted. As shown in Figure 2,
In place of the lead-in line 5 used in conventional signal transmission, an optical transmission device according to the present invention is provided between the command device 3 and the commanded device 4.

This optical transmission device 6 is composed of a transmitter 7, an optical transmission line 8, and a receiver 9.

FIG. 3 is a block diagram showing details of the seventh transmitter shown in FIG. to a * 10 b + to c is an exciter for exciting an electric command signal from the command device 3 to the commanded device 4 . The number of exciters corresponding to the number of command signals is provided. Parallel excitation signals from the exciters 10&, 10b, 10c are converted into serial signals by a converter 11 and input to an electro-optical (Elo) converter 12. That is, the electrical command signals from the command device 3ρ) are multiplexed and transmitted to the E10 transformer 12. Generally, time division multiplexing is used for multiplexing, but frequency division multiplexing may also be used in some cases. The constant optical signals multiplexed in this manner are transmitted to the receiver 9 via the optical transmission line 8.

FIG. 4 is a block diagram showing details of the receiver 9 shown in FIG. 2. The multiplexed optical signal is input to the optical-to-electrical converter 13 and converted into an electrical signal again. The serial electrical signal output from the optical-to-electrical converter 13 is reconverted into a plurality of parallel signals by the converter 14, and is converted into an electrical command signal. Converted to a signal, each corresponds to the Showing Relay 1
It is given as a command signal to the small command device 4 via 6a, 16b, and 16c.

FIGS. 5 to 7 are timing charts for explaining the operation of the embodiment of the present invention shown in FIGS. 2 to 4. FIG. In FIG. 5, a, b, and c indicate command numbers from the command device R3. In response to this command signal, the exciter 10
a, 10b, 10c are each d.

Output excitation signals e and f. Here, the excitation signal d.

There is no problem with the phase relationship between e and f, even if they are in phase.

FIG. 6 is an enlarged view of the area between time 1+ and time 11 shown in FIG. Excitation signal dle.

The excitation signal d is converted into a time-division multiplexed signal having a format such as g by the f-ge converter 11, and in the sixth to first, the excitation signal d is converted into 5-bit length data.

This shows the case where 3-bit data of e and f are loaded.

A start bit is placed at the beginning of one frame, and a stop bit is placed at the end, which are used for data detection by the receiver 11.

The multiplexed signal g is converted into an optical signal by the E10 converter 12, and transmitted to the optical-air converter 13 through the optical transmission line 8. The multiplexed signal converted back into an acid gas signal by the optical-to-electrical converter 13 is input to the converter 14. The converter 14 converts excitation signals d, e,
No. 48, , i, and j corresponding to f are converted in parallel and output. Here, the signal dQ is the signal hK, the signal e is the signal tvc,
Each signal f corresponds to a signal j.

Then, the output signal of the converter 14 is converted to the output signal by the converter 15a.
The signal is converted into a DC signal as shown in Figure 7 and drives the relay t6a. Similarly, the signal is converted to converter 15.
b converts it into a DC signal and connects the relay 16b, and the signal j
is converted into a DC signal by converter 15c VC and drives relay 16c. In this manner, the optical transmission device 6 according to the present invention transmits a plurality of command signals from the command device 3 to the corresponding commanded device 4. In this way, in the transmission according to the present invention, the excitation signal is a meaningful and correct signal, so even if there is grounding or disconnection in either the transmission line or the optical transmission device, the relays 16a, 16b,
16c can perform signal transmission with fail-safe operation.

tys If the serial transmission data cannot be received or if an error is detected, change tftHs15B, 15B.
, 15c do not reproduce the correct signal, so they do not become excitation signals and relays 16a, 16b, ], 6c are not driven either.

In the embodiment explained above, the command signal from the command device lf3 is DC'+110 V, but since the command signal from the command device 3 and the transmitter 7 of the optical transmission device 6 is not transmitted between vehicles, The noise characteristics can be sufficiently improved even at a low voltage of about De15V. In addition, the signal output to the destruction command device (1) must be transmitted at a low voltage of about C15V. Therefore, it is possible to reduce the size of both the command device 3 and the commanded device 4 by using low-voltage power for the input/output devices.

Furthermore, by inserting a receiver 9 into the command device 3, which is a transmitter 7, and a receiver 9 into the commanded device 4, it is possible to create a connection between the command device 3 and the optical transmission device 6, and between the optical transmission device 6 and the commanded device 4! Reliability can be improved by omitting the connecting wire between the

〔Effect of the invention〕

As explained in detail 1 based on the above embodiments, this invention multiplexes a plurality of train command signals and transmits them via an optical transmission line, thereby realizing fail-safe operation. , the insulation between the command device and the commanded device is 1,
This has the advantage of allowing highly reliable signal transmission without fear of electrical leakage or electric shock in the transmission line. M7: Reducing the number of wires and the number of crossings between vehicles becomes an OT function, and the advantage is that it is possible to reduce the cost of electronic images and greatly reduce the number of man-hours required for JP assembly. There is.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of a conventional train command transmission system, and Fig. 2 is a block diagram showing the configuration of a train optical transmission system according to the present invention.
Figure 3 is a block diagram showing the detailed configuration of the transmitter shown in Figure 2, and Figure 4 is a block diagram showing the detailed configuration of the receiver shown in Figure 21. '<
5, 6 and 7 are timing charts for explaining the present invention in detail, respectively. 3... Commanding device, 4... Commanded device, 6... Optical transmission device, 7... Transmitter, 8... Optical transmission line, 9...
receiver. Applicant's agent Kiyoshi Inomata Figure 1 Figure 3 Figure 4

Claims (1)

[Claims] a transmitter that converts an electrical command signal from a vehicle command device to a commanded device into a multiplexed optical signal and outputs the same; an optical transmission line that transmits the multiplexed optical signal from the transmitter; An optical transmission device for a train comprising a receiver for reconverting the multiplexed optical signal from an optical transmission line into the aforementioned 'P2Q command signal and outputting it to the commanded device.