JPS594727B2 - On-board branching device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an on-vehicle branching device that is being considered as part of a new urban transportation system, in which a branching direction command signal transmission system is associated with the automatic control signal transmission system of 25 vehicles. The purpose of this is to ensure fail-safe operation of vehicles at branch points.

Conventional general railways have adopted a ground branching system30, but for new urban transportation systems, an on-vehicle branching system as shown in the figure is being considered.

That is, FIG. 1 shows an example of setting the course direction at a place where the vehicle running path 1 branches into It and Ir, and 35 types of ground contactors such as 3ι and 3 are installed as ground equipment. If the vehicle 4 moves in the direction of the arrow,
2 is a principle explanatory diagram illustrating that a course is taken to a branch road 1r by engaging an on-vehicle switching means such as a course direction setting on-board contactor 5 with a ground contactor 3. FIG.

Note that the branching direction that the vehicle 4 should take is generally determined by information transmitted from the ground. The greatest advantage of this system is that it has great economic effects when the number of branches is large and the number of vehicles is small. However, this system has a drawback in that a fail-safe information transmission system must be provided between various ground signal safety devices and on-board branching devices that ensure safe operation of the vehicle. Furthermore, there has conventionally been a device for selecting and interlocking a branching direction on a taxiway traveled by a vehicle, which is provided with a guide wheel that rolls in contact with a guide rail in a guide groove along the guideway.

This type of vehicle receives an interlock signal from a transmitting device in front of a branch road, and performs an interlock for selecting a branch road, thereby ensuring the safety of vehicle operation on the branch road. However, this type of system detects the branching direction selection state on the vehicle on the ground, and normally transmits the stop command from the ground to the vehicle. Therefore, if there is a failure in the transmission system, the stop command will be transmitted to the vehicle. It has the disadvantage that it is not transmitted upwards, causing serious accidents. The present invention differs from a general block section in which there is no branch section in the branch section and the block section on the opposite side thereof, as illustrated in FIG.

This is an on-vehicle branching device that improves the security of branching sections by transmitting a branching direction command signal that indicates the branching direction. Embodiments of the present invention will be described below with reference to the drawings.

Figure 2 shows a block section AT based on the vehicle automatic control system at the branch point where the vehicle running path 1 branches into branch roads 1t and 1r.
In the line diagram with Al, AT2, and AT3, Al, a2, a
Reference numeral 3 designates ground loop antennas installed at branching portions of the travel path 1 to form block sections ATl, AT2, and AT3, respectively. Similarly, block sections BT and CT are set by the installation lengths of ground loop antennas B and c, respectively. When the vehicle 4 advances from the opposite side of the branch, the section S
T is the adjacent section on the opposite side of the branch, and section CT is its outer blocking section. Vehicle control signals transmitted from the ground to the vehicle via a loop antenna installed on the ground are shown in Figure 3A.
As shown in the chart below, carrier wave Fc is generally converted into modulated wave F
It is a square wave amplitude modulated by one wave of ml, fm2...Fmn.

Depending on the speed command information, modulated waves Fm,, fm2...Fm
Any one wave of n is selected as the speed signal. As an embodiment of the present invention, the signal transmitted to the loop antenna c of the block section CT in FIG. 2 includes a branching direction command signal in addition to the vehicle control signal. In the chart in Figure 3B,
An example is shown in which a right direction signal Fcr or a left direction signal FCt as a branching direction command signal is superimposed and transmitted so as to fill the space of the modulated wave Fml in FIG. For the adjacent block section on the opposite side of the branch, that is, the block section BT in FIG. 2, vehicle control is performed using square wave amplitude modulation in which the carrier wave is Fcr or FCt and the modulated wave is either Fml, fm2...Fmn. Transmit the signal to loop antenna b.

The chart in FIG. 3C is an example in which the carrier wave Fcr or FCt is square-wave modulated with a modulating wave Fml to obtain a speed control signal. Figure 4 is a block diagram of the on-board receiver circuit.
A is a receiving antenna on the vehicle, T is a matching transformer, SC is a vehicle control signal receiving circuit for the carrier wave Fc, which consists of a bandpass filter FCFl amplifier that passes the carrier wave Fc, a polarity detection detector (+) DT, etc., VC MlC is a circuit that detects the reception of the carrier wave Fc by branching the carrier wave Fc amplified by the receiving circuit SC and operating the relay VR. ,M2
C,...MnC are modulated waves Fml, fm2,...
...Fmn selection receiving circuit, consisting of a limiter, a selection filter for each modulated wave, a Schmitt circuit, a rectifier, etc., corresponding to the selected modulated waves Fml, fm2, ...Fmn, and the respective relays SARl, SAR2, ...S
ARn is operated to provide speed command information to the speed control device via the speed command lower priority circuit. LC is carrier wave F
This is a receiving circuit for the left direction signal of the branching direction command signal FCt, which consists of a bandpass filter FLF that passes Ct, an amplifier, and (d) a polarity detection detector EDT. Pass through EDT and select receiving circuit M, C, M2C...
・In addition to MnC, one branch direction selection circuit LV consists of a detector, low-pass filter, Schmitt circuit, rectifier, etc.
Activate relay LR via C.

RC is a bandpass filter FRF, . This is a right direction signal receiving circuit consisting of an amplifier, a polarity detector 0DT, etc., and its amplified output is divided and one is added to the selection receiving circuit as described above, and the other is a detector, The relay RR is operated via a branch direction selection circuit RVC consisting of a low frequency pool, a Schmidt circuit, a rectifier, etc. Figure 5 is the 4th
This is an example of a speed control wheel circuit that is conditioned on the circuit operation shown in the figure, and is composed of an opening/closing circuit SW and a speed command lower priority circuit SP. Circuit contact symbols indicate relay contacts with the same symbol. Next, the function and operation of the present invention will be described.
The vehicle control signal of the carrier wave Fc shown in FIG. 3A is transmitted to the loop antenna d in section DT in FIG. Either the direction signal Fcr or the left direction signal FCt is transmitted so as to fill the space of the carrier wave Fc according to the course setting of the vehicle 4, and is received on the vehicle. Since the amplitude modulated wave of the branching direction command signal Fcr or FCt is being received on the vehicle, either relay RR or LR is activated, and the contact output of the activated relay causes the onboard switching means to be activated. Since the vehicle control signal of the carrier wave Fc is being received and the relay VR is operating, the speed command is issued by the circuit via the contact VR of the switching circuit SW in the wheel steering circuit shown in FIG. A signal is sent to the lower priority circuit SP, and the circuit SP outputs an output based on the speed command information to the speed control device regardless of whether the branch direction is left or right. In this case, in the section CT, the carrier wave Fc
The amplitude modulated waves of Fcr and FCt are simultaneously received on the vehicle, but the carrier wave Fc reception circuit SC performs polarity detection and the carrier wave Fcr reception circuit RC or carrier wave FCt reception circuit LC performs polarity detection. Therefore, the modulated wave Fml,f
The solution is to reduce m2, . . . Fmn. In the block section BT, the modulated wave signal as the carrier wave Fc is not transmitted, and as shown in FIG. 3C, the branching direction command signal Fcr is transmitted.
Or, since FCt is modulated and used as a vehicle control signal,
In the on-vehicle receiving circuit, relay VR is restored and vehicle control signal F
Either relay LR or RR is operated by the modulated wave signal of Ct or Fcr, and relays SARl, SAR2,...SARn are operated via one of the selective receiving circuits.
Either of these will work, but once the relay VR is restored,
It is assumed that either the left or right branch condition due to the operation of relay LR or RR has priority over the speed signal, and branch control is given priority over speed control to ensure safety for branching.

In the speed control logic circuit shown in FIG. 5, when the relay VR is operating, the circuit SP is connected via the contact R of the switching circuit SW.
That is, the speed command lower priority circuit made up of relays SARl, SAR2, . . . SARn is utilized unconditionally, and the speed of the vehicle is controlled by this output.

When relay VR is restored, circuit SP is connected to relays LR and R.
The speed command lower priority circuit SP is controlled by the opening/closing circuit SW which back-checks each other with the contacts of display relays TR and rR (not shown) of the on-board switching means controlled by R and both relays, respectively. It will be put to good use. That is, when the on-board switching means is in the normal down position on the opposite side of the branch, the lifting contact RR of the switching circuit SW → the falling contact TR
→ Lifting contact RR → Falling contact LRl or Lifting contact TR → Falling contact RR → Falling contact RR → Lifting contact LR A signal indicating normal operation is sent to the speed command lower priority circuit SP through the back check circuit consisting of The speed of the vehicle is controlled in response to the speed signal output by the SP. Therefore, section BT
If the on-board switching means is controlled in the wrong direction, the speed signal is cut off and the vehicle comes to an emergency stop. As described above, the branching direction command signal is sent along with the vehicle control signal to the block section CT, and the vehicle moves according to the speed signal included in the vehicle control signal regardless of whether the on-vehicle switching means is in the left or right direction. By operating either LR or RR, left and right switching of the on-board switching means is completed and the vehicle enters the block section BT.

In section BT, a vehicle control signal indicating the branching direction of the vehicle is sent, and the branching control of the Hayabusa is given priority over the speed signal.
If the on-vehicle switching means does not operate normally, take measures to stop the vehicle. In this embodiment, the explanation has been made assuming that the vehicle can come to a complete stop within one block section BT if the on-board switching means is not normal; however, on high-speed routes, the vehicle must come to a complete stop before the junction. Therefore, a plurality of block sections may be appropriately set as sections in which vehicle control signals with meanings attached to branching directions are sent. In addition, in this embodiment, a branching direction command signal is sent together with a vehicle control signal in the section CT, and the on-board switching means is operated in response to this signal on the vehicle. The vehicle control signal may be sent, and the branching direction command signal may be transmitted through another transmission system, thereby operating the on-vehicle switching means.

Even in this case, if a speed signal indicating the branching direction is sent in section BT and received onboard the vehicle, fail-safe vehicle operation at the branching point can be guaranteed as in the example shown in the embodiment. be done. Furthermore, by transmitting a branch display signal from the vehicle to the ground, and when a discrepancy occurs when checking with the branch command conditions, the speed command becomes a stop command.
It can also be used to improve security. Block section ATl,
For AT2 and AT3, the same vehicle control signal as in section BT may be sent. In addition, if the contact of relay R is inserted in series with the contact of relay LR or RR as an output circuit for switching the on-vehicle switching means in the relevant direction, the vehicle control signal sent in the block sections ATl, AT2, AT3 of the branch part may be the same as that of a general block section. The effects of the present invention are as follows. (1) As a carrier wave of the vehicle control signal for transmitting speed signals in the adjacent section on the opposite side of the branch, a temporally continuous signal is used at a frequency that is not used in general sections and transmits information indicating the branch direction. I am doing it.

Therefore, in this section, the operation of the on-board switching means can be confirmed only from the top of the car, and fail-safe operation of the vehicle at the branch point is guaranteed. Furthermore, the vehicle constantly receives signals from the ground, compares the content of the signals with its own state of affairs (branching direction), and if they do not match, the vehicle itself stops.

Therefore, if the signal is cut off due to a failure in the transmission system, or if the branching direction becomes inappropriate due to a failure in the equipment, the vehicle is always configured to stop. In other words, fail-safe properties are ensured. (2) A ground loop antenna for vehicle control signals and an on-vehicle antenna can be used in common to transmit branch direction command signals.

Furthermore, no special detection means is required on the ground side to confirm the operation of the on-vehicle switching means. Therefore, the economic effect is significantly large.

[Brief explanation of the drawing]

The drawings relate to embodiments of the on-vehicle branching device of the present invention, in which Fig. 1 is a schematic explanatory diagram of a branching road on a vehicle running path, Fig. 2 is a schematic diagram of an example of a track, and A in Fig. 3 is a diagram showing a schematic diagram of a branching road on a vehicle running path. Time chart of the speed signal sent to a general block section, B in the same figure is a time chart of the signal sent to a further outward block section adjacent to the adjacent section on the opposite side of the branch road, C is the time chart of the signal sent to the block section on the opposite side of the branch road FIG. 4 is a time chart of signals transmitted to adjacent block sections, FIG. 4 is a block diagram of the on-board receiving circuit, and FIG. 5 is an opening/closing circuit diagram for controlling the speed command lower priority circuit. ATl, AT2, AT3: branch road block section, BT: adjacent block section on the opposite side of the branch, CT: further outward block section adjacent to block section BT, FCr, fCt: branch direction command signal, Fml, fm2, ·・・Fmn: Speed signal, L
R, RR: Branch direction command signal selection relay SP: Speed command lower priority circuit, SW: Open/close circuit.

Claims (1)

[Scope of Claims] 1. A vehicle that continuously transmits a vehicle control signal modulated on a carrier wave having a predetermined frequency from the ground to the vehicle using a speed signal having a frequency corresponding to speed command information for each block section. In an on-vehicle branching type traffic system equipped with an automatic control device, a branching direction command signal having a frequency different from the carrier wave is used as a carrier wave in at least an adjacent section on the opposite side of the branching part, and the speed signal is used as a carrier wave. A transmitting means for transmitting a square wave amplitude modulated vehicle control signal, a branching direction selection circuit for detecting components of a branching direction command signal transmitted from the transmitting means, and a branching direction command detected by the branching direction selection circuit. An on-board switching device comprising an opening/closing circuit that controls the vehicle to stop when the actual branching direction of the on-board switching means does not match. 2. Equipped with a vehicle automatic control device that continuously transmits a vehicle control signal modulated by a carrier wave having a predetermined frequency from the ground to the vehicle using a speed signal having a frequency corresponding to the speed command information for each block section. In an on-vehicle branching type traffic system, the vehicle control signal modulated in square wave amplitude by the speed signal is sent to a further outer section adjacent to the adjacent section on the opposite side of the branching point, and a carrier wave different from the carrier wave is transmitted. a first transmitting means for interpolating and transmitting a branching direction command signal having a frequency into a space portion of the square wave amplitude modulated vehicle control signal; and a second transmitting means for transmitting a vehicle control signal modulated in square wave amplitude by the speed signal, and detecting components of the branching direction command signal transmitted from the first and second transmitting means. , a branching direction selection circuit that causes the on-vehicle switching means to change the direction in accordance with a branching direction command signal sent by the first transmission means; and a branching direction from the second transmission means detected by the branching direction selection circuit. An on-board switching device comprising an opening/closing circuit for controlling a vehicle to stop when a direction command and an actual branching direction of the on-board switching means do not match.