JP2001286001A - Information transmission device for railcar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reissue a token and generate a transmission lag if a token frame continues to be detected for a certain period, in a token buss network. SOLUTION: This transmission device is provided with a terminal controller making an information exchange with respective apparatuses connected with terminal devices, and a means of selecting either of two transmitter receivers. By the selecting means, the operating conditions of the two transmitter receivers are monitored and, during sending or receiving operation, the proper transmitter receiver is used as necessary and, by transmission control based on token passing, data exchange is made between the terminal devices of respective vehicles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railway vehicle which transmits control information of a master controller installed in a leading vehicle to each device installed in each vehicle, and collects the operation state of each device. The present invention relates to a railway vehicle information transmission device that collectively displays information on a display installed in a leading car.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing a conventional railway vehicle information transmission device. In the figure, 1 to 3 are terminal devices installed in each vehicle, 4 is a master controller, 5 is a display provided in a cab, and 6 to 9 are master controllers such as a main controller and a brake controller. Is a device that operates based on the control information. Each of the terminal devices 1 to 3 is mutually connected by a first transmission line 10 and a second transmission line 11 that pass between trains.

In FIG. 3, a first transmission system composed of a transmission line 10 and transceivers 111, 211, and 311 connected thereto is referred to as a system 1, and a transmission line 11 and a transceiver 112 connected thereto are referred to as a first transmission system. , 212, and 312 are referred to as a second transmission system. Note that the transmitters 111, 112,
Reference numerals 211, 212, 311 and 312 denote an encoder for encoding a given information sequence, a multiplexer for decoding an original information sequence from a received waveform, a modulation circuit for performing a modulation suitable for a band of a transmission path, and And a demodulation circuit.

[0004] Here, the systems 1 and 2 are bus-type networks based on multi-drop connection, and employ a token passing system, which is generally called a token bus-type network. The token means a transmission right to the transmission path, and exists only on the transmission system.
By circulating the token in a predetermined order between the terminal devices connected to the transmission line, the terminal devices alternately transmit data frames and exchange information.

[0005] Transmission control in the token bus type network will be described based on the system 1 in FIG. Now, it is assumed that the terminal device 1 holds the token. The terminal controller 140
The control information generated by the master controller 4 connected to itself is acquired, and a data frame including the control information is transmitted onto the transmission line 10 by the transceiver 111. Transceiver 11
1, the data frame transmitted to the transmission path 10 is
The signals are received by the transceivers 211 and 311 of the terminal devices 2 and 3, and are processed by the respective terminal controllers 240 and 340. That is, the terminal controller 240, based on the control information included in the received data frame, each device 6,
7 to the control command. Similarly, the terminal controller 34
0 sends a control command to each of the devices 8 and 9 based on the control information included in the received data frame.

[0006] Next, the terminal controller 140 sends the signal to the transceiver 111.
To send a token frame to the terminal device 2. The token frame is transmitted and received by the transceiver 21 of the terminal device 2.
1 and processed by the terminal controller 240. Here, the terminal controller 240 knows that it has acquired the transmission right, acquires operation information of the devices 6 and 7 connected to the terminal device 2, and transmits a data frame including the operation information by the transceiver 211. It is sent out on the road 10.

The data frame transmitted to the transmission line 10 by the transceiver 211 is transmitted to the transceiver 111 of the terminal device 1.
And processed by the terminal controller 140. That is, the operation state of each of the devices 6 and 7 is displayed on the display 5 based on the operation information included in the received data frame. Next, the terminal controller 240 sends a token frame to the terminal device 3 using the transceiver 211. The token frame is received by the transceiver 311 of the terminal device 3 and processed by the terminal controller 340. Here, the terminal controller 340 knows that it has acquired the transmission right, acquires operation information of the devices 8 and 9 connected to the terminal device 3, and transmits a data frame including the operation information by the transceiver 311. It is sent out on the road 10.

[0008] The data frame transmitted to the transmission line 10 by the transceiver 311 is transmitted to the transceiver 111 of the terminal device 1.
And processed by the terminal controller 140. That is, the operation state of each of the devices 8 and 9 is displayed on the display 5 based on the operation information included in the received data frame. As described above, the data exchange between the terminal devices is performed by the respective terminal devices sequentially transmitting the data frames in accordance with the circulation of the token frame.

Further, in FIG. 3, the first system and the second system operate in parallel as a dual system, and the data exchange by the token circulation is similarly executed in the second system.
In particular, the duplex system shown in the figure shows a so-called hot standby type standby duplex system. That is, the 1st system and the 2nd system perform transmission control independently of each other, and usually control the equipment and display the operation state of the equipment based on the information transmitted and received via the 1st system. If there is, a similar process is performed based on the information exchanged via the second system. By configuring such a duplex system, even if a failure occurs in one of the transmission systems, it has a property of operating without any trouble as long as the other transmission system is operating normally. .

FIG. 4 explains the operation when a failure occurs in the dual system. In the figure, R5
R7 represents a transmission path of the token frame. Now, it is assumed that a failure has occurred in the transceiver 211 of the terminal device 2 and the reception operation has not functioned normally.
When the terminal device 1 holds the token, the transceiver 1
Frames are transmitted from the transmission lines 11 and 112 onto the transmission lines 10 and 11. Especially for the token frame, the route R5
Is sent to the terminal device 2 via R6 and R6.
The terminal device 2 cannot receive the token frame from the route R5 because a failure has occurred in the first-system transceiver 211. In this case, the terminal controller 140
In, the failure of the transceiver 211 is detected by the failure detecting means such as timeout. However, even in such a case, if the transmission system of the second system is operating normally, the token frame can be received via the route R6, so that the token transfer from the terminal device 1 to the terminal device 2 is performed. Is performed normally, and the token circulation is maintained in a normal state.

[0011]

By duplicating the transmission system, normal operation is assured for the above-mentioned faults. However, as shown in FIG. When a failure occurs in the transmission / reception system, all transmission paths from the terminal device 2 to the terminal device 3 are disconnected, so that normal operation cannot be maintained. Next, a problem to be solved by the invention will be described with reference to FIG. In the figure, R5 to R7 represent transmission paths of the token frame.

The transfer of the token from the terminal device 1 to the terminal device 2 is normally performed by the same processing as described above. Next, the terminal device 2 holds the token, and the terminal device 3
Assuming a case where the token is transferred to the server, since a failure occurs in the transceiver 211, the frame is transmitted from the transceiver 212 to the transmission path 11 only. That is, the transmission of the token frame is performed only through the path 7. Here, if a failure occurs in the transmitter / receiver 312 of the terminal device 3, the transmitter / receiver 312 cannot receive the frame, and as a result, no information is transmitted to the terminal controller 340. . In this case, the transfer of the token is not performed normally, which affects the entire transmission system.

This obstacle can be avoided by interconnecting the transmitter / receiver of each terminal device and the diverging portions of the transmission lines of the first and second systems. However, they interfere with each other, and the same phenomenon as the collision of frames on the transmission path occurs, making it difficult to maintain normal transmission. However, this frame collision is because the transmission systems 1 and 2 operate independently of each other, and the transmission systems 1 and 2 operate in synchronization with each other. If the frame is transmitted from either one of the transmitter and the receiver of the two systems, the problem of the interference of the transmission waveform as described above can be avoided.

In general, in a token bus network, a token frame on a transmission line is monitored by all terminal devices, and if a token frame is not detected continuously for a certain period of time, a token reissue process is performed. In this case, the monitoring time needs to be set to a value in consideration of a certain margin, which is about 120% of the time for the token to make a round in the transmission system. This is because if the monitoring time is set short, the token is reissued before the token is received, so that there is a high possibility that an abnormal state where multiple tokens exist in the transmission system will occur. This is because complicated recovery processing is required. Therefore, if the token reissue process is performed due to the loss of the token as described above, a transmission delay occurs, which is not desirable as a transmission system of a control system such as a railway vehicle information transmission device. . The present invention has been made in view of the above points, and its purpose is to
It is an object of the present invention to provide an information transmission device for a railway vehicle that solves the above-mentioned drawbacks in the combined failure.

[0015]

Means for Solving the Problems A duplicated transmission line passing through the train, a terminal device installed in each vehicle, and two terminal devices connected in parallel to each of the transmission lines in the terminal device. In a railway vehicle information transmission device having a transceiver and interconnecting various devices installed in each vehicle, a terminal controller for exchanging information with each device connected to the terminal device; Means for selecting either one of the two transceivers. The selecting means monitors the operation state of the two transceivers, and when receiving, if both the transceivers are normal, the The information from the specified transceiver is used as the received information. When both transmitters and receivers are normal during transmission, the frame is transmitted using the predefined transceiver, and any of the transceivers is used. If the signal is abnormal, use a normal transceiver. It performs the transmission of the frame Te, the transmission control based on token passing, exchanging data between terminals of each vehicle.

[0016]

FIG. 1 is a block diagram showing components of an embodiment of the present invention. 6, the components having the same reference numerals as those in FIG. 6 have the same configuration and function. It is assumed that the display 5 is an LCD display with a touch sensor or the like. The devices 6 and 8 are main control devices installed in each vehicle, and the devices 7 and 9 are brake control devices. Here, the transmission lines 10 and 11 are transmission media such as shielded twisted pair wires, and the terminal devices of each vehicle are connected in a multidrop manner.

In FIG. 1, transmission line 10 and transmission line 1
1 and the transceivers 111, 211, 311 connected thereto
The first transmission system composed of
And the transmission line 11 and the transceiver 112 connected thereto,
The second transmission system including 212 and 312 is referred to as a second system.

It should be noted that, unlike the configuration of the conventional railway vehicle information transmission device shown in FIG. 3, the transmission lines of the first and second systems are formed by connecting the transmission lines 10 and 11 together. The point is to use things in common. That is, 01 in FIG.
At branch points indicated by 02 and 03 (connection points to terminal devices), the transmission line 10 and the transmission line 11 are mutually connected. Here, the combination of the transmission line 10 and the transmission line 11 is electrically equivalent to a single transmission line.
Improve reliability against poor contact and the like.

Reference numerals 120, 220, and 320 denote selection means. At the time of reception, when both the 1-system and 2-system transceivers normally receive a frame on the transmission path, one of the transceivers is used. To the terminal controller,
When a frame is received by only one of the 1-system and 2-system transceivers, the information from the transceiver that normally received the frame is sent to the terminal controller, and the transceiver that failed to receive the frame is sent. Includes a logic for determining that a failure has occurred.

[0020] Further, at the time of transmission, when transmitting a frame on a transmission path, the selecting means may be a first or second system.
The system has a function of selecting which transceiver of the system is to be used. If the transceivers of the first system and the second system are normal, the predetermined transceiver is selected, and the failure at the time of the reception is selected. Is detected, a normal transceiver is selected and a frame is transmitted.

Reference numerals 130, 230, and 330 denote terminal controllers according to the present invention, which are a transmission control function based on token passing, an information exchange function with the selection means, and a function of transmitting a control command to each device under the terminal device. And a function of collecting the operation state of each device.

Next, FIG. 2 shows the transmitter / receiver 21 of the terminal device 2.
1 shows a case where a failure has occurred in the transceiver 312 of the terminal device 3 and the transmission control in this case will be described. In the figure, R1 to R4 represent transmission paths of the token frame. Now, assuming that the terminal device 1 holds the token, the terminal controller 130 obtains the control information generated by the master controller 4 connected to the terminal device 1 and transmits / receives the control information via the transmission / reception device 111 or the transmission / reception The data frame including the control information is transmitted onto the transmission lines 10 and 11 by the transmitter 112.

The data frame transmitted by the transmitter / receiver 111 or 112 on the transmission path 10 and the transmission path 11 is received by the transmitter / receiver 212 via the branch point 02, and is transmitted through the selection means 220 to the terminal controller. 23
0 is processed. Here, since a failure has occurred in the transmitter / receiver 211, the frame on the transmission path cannot be received.
Although the frame is received, the transmitter / receiver 211 recognizes that the frame is not received, and the abnormality of the transmitter / receiver 211 is detected. Even in this case, the terminal controller 230 can send a control command to each of the devices 6 and 7 based on the control information included in the normally received data frame.

Similarly, the transceiver 111 or the transceiver 1
The data frames transmitted onto the transmission lines 10 and 11 by the transmission line 12 pass through the branch point 03 and pass through the transmitter / receiver 3.
11 and processed by the terminal controller 330 via the selection means 320. Here, since a failure has occurred in the transmitter / receiver 312, the frame on the transmission path cannot be received. The unit 312 recognizes that no frame has been received, and detects an abnormality in the transceiver 312. Even in this case, the terminal controller 330 can send a control command to each of the devices 8 and 9 based on the control information included in the normally received data frame.

Next, the terminal controller 130 selects the selecting means 120
And sends a token frame to the terminal device 2 using the transceiver 111 or 112. (In FIG. 2, a token frame is transmitted from the transceiver 112 side.) The token frame is received by the transceiver 212 of the terminal device 2 via the routes R1 and R2,
The processing is performed by the terminal controller 230 via the selection means 220. Here, similarly to the above, in the transceiver 211,
Since no frame is received, an abnormality of the transceiver 211 is detected. The terminal controller 230 knows that the transmission right has been acquired from the notification of the token frame reception from the transceiver 212, obtains the operation information of the devices 6 and 7 connected to the terminal device 2, and
, The data frame including the operation information is transmitted onto the transmission lines 10 and 11 by the transceiver 212.

The data frames transmitted to the transmission lines 10 and 11 by the transceiver 212 are received by the transceivers 111 and 112 of the terminal device 1,
20 through the terminal controller 130. That is, the operation state of each of the devices 6 and 7 is displayed on the display 5 based on the operation information included in the normally received data frame.

Next, the terminal controller 230 selects the selector 220
And sends a token frame to the terminal device 3 using the transceiver 212. The token frame is received by the transceiver 311 of the terminal device 3 via the route R3 and the route R4, and is processed by the terminal controller 330 via the selection means 320. In this case, similarly to the above, the transmitter / receiver 311 does not receive a frame, so that an abnormality of the transmitter / receiver 311 is detected. The terminal controller 330 knows that the transmission right has been acquired by the notification of the token frame reception from the transceiver 311.
The operation information of the devices 8 and 9 connected to the terminal device 3 is acquired, and the data frame including the operation information is transmitted by the transceiver 311 through the selection unit 330 to the transmission line 10.
And 11 on.

The data frames transmitted to the transmission line 10 and the transmission line 11 by the transceiver 311 are
, And are processed by the terminal controller 130 via the selection means 120. That is, based on the operation information included in the normally received data frame, the operation states of the devices 8 and 9 are displayed on the display 5.
In the case where a failure corresponding to the composite failure shown in FIG. 2 occurs, it is possible to maintain normal token circulation without performing any processing such as timeout detection.

[0029]

As described above, according to the present invention, even if a fault occurs alternately in the transceivers 1 and 2 of the adjacent terminal equipment in the duplexed transmission system, the fault is prevented. It is possible to realize a railway vehicle information transmission device that maintains normal transmission without requiring a process for return.
Further, the transmission lines 10 and 11 are connected to the respective branch points 01, 0
2, 03, it is electrically equivalent to a single transmission line, but it is possible to realize a railway vehicle information transmission device with improved reliability against disconnection of the transmission line, poor contact, etc. It is very useful in practice.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a railway vehicle information transmission device according to the present invention.

FIG. 2 is an explanatory diagram of processing when a compound failure occurs in the railway vehicle information transmission device according to the present invention.

FIG. 3 is a diagram showing a configuration of a conventional railway vehicle information transmission device.

FIG. 4 is an explanatory diagram of processing when a single failure occurs in a conventional railway vehicle information transmission device.

FIG. 5 is an explanatory diagram of processing when a composite failure occurs in a conventional railway vehicle information transmission device.

[Explanation of symbols]

10, 11, transmission line 1, 2, 3, terminal device 01, 02, 03 ... branch point 111, 112, 211, 212, 311, 312 ... transceiver 120, 220, 320 ... selection means 130, 230, 330 ... Terminal controller 140, 240, 340 according to the present invention Terminal controller according to the conventional railway vehicle information transmission device 4 Master controller 5 Display 6, 7, 8, 9 Equipment R1, R2, R3, R4, R5, R6, R7 ... Token frame transmission path

Claims (1)

[Claims] 1. A dual transmission line passing through a train, a terminal device installed in each vehicle, and two transceivers connected in parallel to each of the transmission lines in the terminal device. And a terminal controller for exchanging information with each device connected to the terminal device in a railway vehicle information transmission device configured by mutually connecting various devices installed in each vehicle; Means for selecting either one of the transceivers. The selection means monitors the operation state of the two transceivers, and when receiving, if both the transceivers are normal, the predetermined means is used. The information from the transmitter / receiver is used as the received information. At the time of transmission, if both transmitters / receivers are normal, the frame is transmitted using the predetermined transmitter / receiver, and if either transmitter / receiver is abnormal. Frame transmission using a normal transceiver. An information transmission device for a railway vehicle, wherein data is exchanged between terminal devices of each vehicle by transmission control based on token passing.