JP2995100B2 - Communication device for train control - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device for controlling a train, and more particularly to a communication device suitable for an ATS device (automatic train stop device). 2. Description of the Related Art In recent years, an ATS device exchanges a large amount of data between the ground and a vehicle to add not only an original ATS function but also a column number reading function and a terminal overrun protection function. Alternatively, the configuration is such that useful data can be provided to a route selecting device, a level crossing fixed time control device, a guide broadcasting device, and the like. As shown in FIG. 4, such a multifunctional ATS device is provided at a predetermined interval between a data communication device main body (hereinafter, referred to as a main body) 1 provided at a predetermined position on the ground side and a rail L. A plurality of ground children P1, P
.. Pn and a plurality of repeaters R1, R2,.
, R2... Rn, a 1P (pair) data cable 1 for exchanging data, and each of the repeaters R1, R2
2... A 1P power cable l 'for supplying power to Rn is provided. [0003] In the above configuration, the main unit 1 performs signal processing in the data communication unit 2 based on the input external signal (in this example, the present signal from the traffic signal S), and from there, to each repeater via the data cable l. On the other hand, a predetermined data signal to which an address corresponding to each repeater is added is transmitted. On the other hand, collation data (return data) is transmitted from each of the repeaters R1, R2,... Rn to the collation unit 3 of the main unit 1 via the data cable l, where the data communication unit 2 transmits each of the repeaters R1, R2,.
It is checked whether there is any error in the data sent to Rn. If an erroneous repeater is detected in this check, the normally operating relay RY falls, and the power to each of the repeaters R1, R2,... Rn is cut off. For example, if there is a discrepancy between the data sent to the repeater R2 and the return data from the repeater R2, the normally operating relay RY falls and the contact RYC of this relay turns off the power supply of the power cable l '. To stop the functions of the repeaters R1 to Rn. Therefore, incorrect data is not transmitted from the ground child P2 to the upper child t mounted on the train T, and the controller C of the train T performs control processing based on the incorrect data. Is prevented. [0005] However, in the above-mentioned conventional train control communication device, a plurality of repeaters are connected to one power cable, so that the power cable can be lengthened indefinitely. In addition, when one of the repeaters fails, the power cable is shared with the other repeaters, so that there is inconvenience that only the failed repeater cannot be connected and disconnected. Had the inconvenience of having to set the address. Further, there is a disadvantage that the construction cost is increased because the repeater and the grounding element are configured separately. Accordingly, the present invention has been made to solve such a drawback, and its object is not limited to the cable length, and individual repeaters (ground terminals) can be separated. Another object of the present invention is to provide a train control communication device that is simple in site construction. [0007] In order to achieve the above object, the present invention provides a grounding device coupled to a data communication device main body provided on the ground side, and a controller mounted on a train. In a train control communication device that transmits and receives data via a vehicle child coupled to the vehicle, the data communication device main body and the ground child superimpose data transmission and power supply to the ground child. When there is a mismatch between the data transmitted from the data communication device main body to the ground slave side and the return data from the ground slave side based on the data, the power supply to the cable is cut off. The cutting means is provided. In the above configuration, the data and the power supplied to the ground wire flow in the cable connecting the main body and the ground wire in a superimposed manner. The power supplied to the cable is cut off by the cutting means when there is a mismatch between the data sent from the main unit to the ground unit and the data returned from the ground unit to the main unit. The grounding element whose power supply is cut off stops its function. An embodiment of the present invention will be described below with reference to the drawings. Note that the same components as those in the conventional device of FIG. FIG. 1 is a schematic configuration diagram of the embodiment device, in which the left half belongs to the main body side and the right half belongs to the ground child side. The data communication unit 2 includes a switching pulse generation circuit 2
a, a data generation circuit 2b for generating serial data based on an external condition (control signal), and a data generation circuit 2b
Modulates the serial data generated in step (1) by a carrier into an FSK signal corresponding to the serial data, or
And a transmission circuit 2c for demodulating the carrier waves from 1 to Pn. The switching pulse generation circuit 2a cyclically transmits a switching pulse signal to transmission AND gates G1 to Gn provided for the ground terminals P1 to Pn and return AND gates g1 to gn. (See FIG. 2C). As shown in FIG. 2A, the data generation circuit 2b cyclically generates serial data for each of the ground terminals P1 to Pn. This serial data is shown in FIG.
As shown in (1), a start flag and a stop flag are respectively provided on both sides, and data and a CRC (cyclic redundancy check) bit for error detection are provided between these two flags. Then, the serial data is modulated by the transmission circuit 2c into an FSK signal corresponding to the serial data, and then output to the transmission AND gates G1 to Gn. Therefore, each transmission AND gate G
The data signal (FSK signal) shown in FIG. 2B is transmitted from Gn to each of the ground units p1 to pn. Since the output side of each transmission AND gate G1 to Gn is input to each return AND gate g1 to gn, the transmission data from each ground unit p1 to pn is taken into the transmission circuit 2c. (See FIG. 2).
(D)). Each of the ground units p1 to pn is constructed by integrating the functions of a conventional ground unit and a repeater. Each ground unit p1
To pn have the same configuration, and therefore, the ground unit p1 including the ground child P1 will be described here as an example. The ground unit p1 is an antenna having a function of transmitting radio waves from the ground side to a vehicle mounted on a train, receiving a signal from the vehicle, and picking up a signal transmitted to the vehicle mounted. And the FS sent from the main unit 1
While demodulating the K signal and converting it to serial data,
A first transmission unit 7 for modulating serial data from the train side and converting it to an FSK signal, a memory 8 for temporarily storing the converted serial data, and converting the stored serial data to an FSK signal And a second transmission unit for transmitting the signal from the antenna 5, demodulating the signal received by the ground antenna P1 and converting it into serial data, storing the converted serial data in the memory 8 and outputting it to the first transmission unit 7. 9. The main body 1 and the ground units p1 to pn are connected by a 1P cable 10, respectively.
Each of the cables 10, 10,...
A power supply line in which contact points RY1 C to RYn C of RYn and a choke coil for blocking an AC component are connected in series is connected so that a DC power supply of a predetermined voltage of, for example, 100 V is supplied from the power supply unit 4. I have. In the figure, T1 to T
n is a transformer provided on the output side of each transmitting AND gate G1 to Gn (input side of each returning AND gate g1 to gn), and t1 to tn are the ground units p1 to pn.
A transformer provided on the input side of the first transmission unit 7 functions to prevent DC power from the power supply unit 4 from entering the inside of the main body 1 and the inside of each of the ground units p1 to pn. Reference numeral 11 denotes a DC which is provided in each of the ground units p1 to pn and which is connected in series with a choke coil for blocking an AC component, for example, converts 100V to 15V.
A DC converter that supplies power for driving each of the ground units p1 to pn. In the data communication in the above configuration,
Predetermined data is cyclically transmitted from the data generation circuit 2b of the main unit 1 to the ground units p1 to pn, and data from the vehicle is transmitted to the main unit 1 from the ground units p1 to pn. . On the other hand, as shown in FIG. 2D, a return signal corresponding to the data transmitted to each of the ground units p1 to pn is transmitted to the main body 1, and this return signal is transmitted to the collating unit. The collation processing is performed in step S3. That is, the matching unit 3 checks the data from the ground unit based on the data sent from the main unit 1, and when the matching does not match, erroneous data may be transmitted to the vehicle. Then, the normal operation relay of the ground unit in which the mismatched data occurs falls.
When the normal operation relay falls, the contact of the normal operation relay is turned off. Therefore, the power of the ground unit corresponding to the normal operation relay is cut off and the function is stopped. For example, if a mismatch occurs in the data of the ground unit p1 and the normal operation relay RY1 falls, the contact RY
Since 1 C is turned off and the power to the cable 10 connecting the main unit 1 and the ground unit p1 is cut off, the function of the ground unit p1 is stopped. The apparatus according to the present embodiment includes a main body 1 and ground units p1 to p1.
Since pn is connected by a 1P cable that superimposes the data and the drive power of each of the ground units p1 to pn, the ground unit in which the verification mismatch is detected falls in the normal operation relay and the normal operation relay By turning off the contact, the power supply to the ground unit is cut off to ensure fail-safe, and the operation of the other normal ground units can be continued without being cut off. Further, since each of the ground units p1 to pn is individually connected to the main body, there is an advantage that address setting work on site is not required. In addition, since each of the ground units p1 to pn is formed by integrating the conventional repeater and the ground unit, the installation work on the ground unit side can be simplified. According to the present invention, since the main body and each ground terminal are connected by a cable that superimposes the data and the power supply to each ground terminal, the cable is disconnected from the ground terminal in which the matching mismatch is detected. Since the supply of power is stopped by the means, fail-safe is ensured, and other normal ground units can continue to operate. Further, since each ground unit is individually connected to the main body, there is an effect that address setting work on site is not required.

[Brief description of the drawings] FIG. 1 is a schematic configuration diagram of an apparatus according to an embodiment of the present invention. FIG. 2 is a time chart of a signal. FIG. 3 is an explanatory diagram of serial data. FIG. 4 is a schematic configuration diagram of a conventional device. [Explanation of symbols] 1 Data communication device main unit (main unit) 10 Cable P1 to Pn p1 to pn ground equipment RY1 to RYn disconnecting means (normal operation relay)

Continuing on the front page (72) Inventor Takahisa Kurihara 1-6-5 Marunouchi, Chiyoda-ku, Tokyo East Japan Railway Company (72) Inventor Takehiko Hoshino 1-13-8 Kamikizaki, Urawa-shi, Saitama Japan Signal Inside the Yono Works Co., Ltd. (72) Inventor Hidetaka Saegusa 1-13-8 Kamikizaki, Urawa-shi, Saitama Nihon Signal Co., Ltd. Inside the Yono Works Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) H04B 5 / 00 B61L 3/00 H04B 3/44 H04B 3/46

Claims (1)

(57) [Claims] Data is transmitted / received via a ground child connected to a data communication device main body provided on the ground side and a vehicle child connected to a controller mounted on a train. In the train control communication device, the data communication device main body and the ground child are connected by a cable that performs transmission and reception of data and power supply to the ground child in a superimposed manner, and the data communication device main body is connected to the ground child side. When there is a mismatch between the data transmitted to and the return data from the ground based on the data, disconnection means for disconnecting the power supply to the cable is provided.
A communication device for controlling a train.