JPS61278230A - Train centralized controller - Google Patents

Abstract

PURPOSE:To send always information even when noise is invaded to a transmission line by connecting a circuit identifying noise at noise mixing and correcting the signal into a normal code to a transmission line tying a central device and a station device. CONSTITUTION:A binary-coding signal outputted from a reception circuit 203 and a signal outputted from an A/D conversion circuit 204 are given to a code correction circuit 205. The circuit 205 converts a signal inputted from the circuit 203 into a normal code based on the signal given from the A/D conversion circuit 204, and the relation of the mark and space of the normal code signal known in advance. The similar operation is applied by a reception circuit 103, an A/D conversion circuit 104 and a code correction circuit 105 relating to the train information signal given to the central device 1 through a transmission circuit 202 and a display line 4 from station devices 21-2n. Since the circuit 105 identifying noise pattern and correcting the signal into a normal code is connected to the transmission line 102 tying the central device 1 and the station devices 21-2n in this way, even if noise is invaded to the line 102, the information is sent always.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a train centralized control device (hereinafter referred to as a CTC device), and includes a transmission line connecting a central device and station equipment.
By connecting a circuit that identifies the noise pattern when noise is mixed in and corrects it to a normal code, it is possible to always transmit information even if noise is mixed in the transmission line.

2. Description of the Related Art As shown in FIG. 5, a general configuration of a conventional CTC device includes a central device 1 and a plurality of station devices 21 to 2n, a logic circuit 101 provided in the central device 1, and a transmitter. circuit 102
A receiving circuit 203 provided in each of the station equipment 21 to 2n receives a calling signal transmitted through the control line 3 from the station equipment 21 to 2n.
The train information is then received and decoded by the logic circuit 201, and then transmitted from the station devices 21 to 2n to the central device 1 through the transmitting circuit 202 and the display line 4. The circuit 101 receives and decodes the data. Call signals and train information signals are generally transmitted as binary stamps with predetermined marks and spaces.

The logic circuits 201 of the station devices 21 to 2n are connected to the central device 1.
It is configured with a circuit that detects changes in information sent from the computer, a circuit that stores the information, and the like. In addition, the logic circuit 101 of the central device 1 and the logic circuit 2 of the station devices 21 to 2n
01 is provided with check circuits 101a and 201a, respectively, for checking received information.

Problems to be Solved by the Invention Incidentally, noise may enter the control line 3 and the display line 4 due to the influence of trains, factories, etc. As a countermeasure against this noise, conventionally, the control line 3 and the display line 4 are
The check circuit 101 is configured by a dedicated line such as a coaxial cable with excellent noise resistance, and is installed in the logic circuit 101 of the central device 1 and the logic circuit 201 of the station devices 21 to 2n.
a, 201a is provided, and detects whether noise is mixed in the transmission code sent through the control line 3 and display line 4 by parity check, repetition check, CRC check, etc., and detects noise mixture. In the past, information was sent and received using procedures such as retransmission.

Therefore, in the conventional CTC device, there was a problem in that the equipment cost of the control line 3 and the display line 4 became extremely high.

As a means of reducing equipment costs for the control line 3 and display line 4, it is possible to use existing telephone lines instead of providing dedicated lines, but the noise resistance of the transmission line is significantly lower than that of coaxial cables, etc. Therefore, even if a check circuit as described above is provided, it becomes difficult to take measures such as retransmitting information.

Means for Solving the Problems In order to solve the above-mentioned conventional problems, the present invention includes a central device and a station device, and transmits train information from the station device to the central device upon a call from the central device. CT that transmits
The apparatus C is characterized in that a circuit for identifying a noise pattern when noise is mixed in and correcting it to a regular code is connected to the transmission line connecting the central apparatus and the station apparatus.

When noise enters the transmission line between the operating central equipment and the station equipment, the transmission signal will have a pattern different from that in normal times.

A noise pattern is identified from this pattern, converted to a regular code, and provided to the central equipment or station equipment. Therefore, even if noise enters the transmission line, information can always be transmitted.

Moreover, even if noise gets mixed in, it can be detected and converted into a regular code, so there is no need to use expensive dedicated lines such as coaxial cables as transmission lines, and instead use existing communication lines such as telephone lines. It becomes possible to do so.

Example FIG. 1 is a block diagram of a CTC device according to the present invention.

In the figure, the same reference numerals as in FIG. 5 indicate the same components. 104 and 204 are analog/digital conversion circuits (hereinafter referred to as A/D conversion circuits), 1
05 and 205 are code correction circuits, which are connected to the control line 3 and display line 4 that connect the central device 1 and the station devices 21 to 2n, respectively, and identify the noise pattern when noise is mixed in and correct the normal code. Configure a circuit that corrects for In this embodiment, the sign correction circuits 105 , 205 are provided in series between the receiving circuits 103 , 203 and the logic circuits 101 , 201 , and the receiving circuits 103 , 203
A/D conversion circuits 104 and 204 are connected in parallel with the circuits, and the outputs of the A/D conversion circuits 104 and 204 are provided to sign correction circuits 105 and 205, respectively.

In the above configuration, from the central device l to the station devices 21 to 2n
An explanation will be given by taking an example of the operation when transmitting a call signal to. First, it is assumed that the calling signal at the output terminal A1 of the transmitting circuit 102 of the central device 1 is a binary signal having a mark T1 and a space T2 corresponding to station designation information, as shown in FIG. 2(a). This call signal is sent to the station equipment 2 through the control line 3.
1 to 2n, but noise is mixed in during the transmission, and the reception circuit 203 and A/D conversion circuit 20
The input signal at the input terminal Bl of No. 4 has a distorted waveform as shown in FIG. 2(b).

The mark and space identification values in the receiving circuit 203 are the second
Assuming E2 in FIG. 2(b), a binary signal shown in FIG. 2(c) is obtained at the output end of the receiving circuit 203. At the same time, the A/D conversion circuit 204 also
), the self-identification range (ΔE+
) can be obtained. This signal clearly represents the state of the received signal.

The binary code shown in FIG. 2(C) outputted from the receiving circuit 203 and the signal outputted from the A/D conversion circuit 204 are given to a code correction circuit 205. In the sign correction circuit 205,
The signal input from the receiving circuit 203 is normalized based on the binary code given from the receiving circuit 203, the signal given from the A/D conversion circuit 204, and the relationship between the mark T1 and space T2 of the normal signal, which is known in advance. The code is converted into a code, and a binary code having a regular mark Tl and space T2 as shown in FIG. 2(C) is output.

A similar operation is performed by the receiving circuit 103, A/D conversion circuit 104, and sign correction circuit 105 regarding train information signals given from the station devices 21 to 2n to the central device l through the transmitting circuit 202 and the display line 4. .

Further, since the timing of signal transmission between the central device 1 and the station devices 21 to 2n is known in advance, a circuit configuration that opens the reception gate in accordance with that timing is also extremely effective. An example of FIG. 3 is shown, 108, 20
8 is a receiving gate.

As shown in FIG. 4(a), when a copyright determination signal is sent from the central device 1 to the control line 3 at timing to, in response to this signal, the station devices 21 to 2n send the display line 4 to the display line 4 at timing t1. Train information is sent (Figure 4(b)),
Timing to and t! Since the time relationship between The noise n1 previously mixed into the display line 4 can be ignored. The code correction circuit 105 only needs to convert the noise n2 mixed in while the receiving gate 106 is open into a regular code.The timing for opening the receiving gates 206 of the station equipment 21 to 2n is the same after transmission by the station equipment. It can be set as

Effects of the Invention As described above, the CTC device according to the present invention has a circuit connected to the transmission line connecting the central device and the station device to identify the noise pattern when noise is mixed in and correct it to a regular code. Therefore, even if noise enters the transmission line, information can be transmitted at all times. Moreover, it is possible to use a communication line such as an existing telephone line as the transmission line instead of a dedicated line such as a coaxial cable, and it is possible to provide a CTC device that can significantly reduce the equipment cost of the transmission line compared to the conventional one. can.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a CTC device according to the present invention, FIGS. 2(a) to 2(d) are waveform diagrams of transmission signals in each part, and FIG.
The figure is a block diagram of another embodiment of the CTC device according to the present invention, FIGS. 4(a) to (C) are time charts thereof, and FIG. 5 is a block diagram of a conventional CTC device. 1...Fist central device 21~2n...φ station device 101
...Logic circuit 102 φ・Transmission circuit 103 Fist・・Reception circuit 104 ・Φ・A/D conversion circuit 105 ...Sign correction circuit 201 ...Logic circuit 202 ...Transmission circuit 203 ...Reception Circuit 204 ... A/D conversion circuit 205 ... Φ code correction circuit procedural amendment Oj0 September 21, 1985 Michibu Uga, Director-General of the Immunology Agency, 1960 Patent Application No. 11.9974 2, Title of the Invention 3. Relationship with the case of the person making the amendment Patent applicant □ Hiroshi Takeuchi 6゜ Number of inventions to be claimed by amendment O No. 4
figure

Claims (1)

[Claims] (1) In a train centralized control device that has a central device and a station device and transmits train information from the station device to the central device upon a call from the central device, the central device and the station device are connected. A train centralized control device characterized in that a circuit is connected to a transmission line to identify a noise pattern when noise is mixed in and correct it to a regular code.