JPS633791B2 - - Google Patents

Description

[Detailed Description of the Invention] When a vehicle passes over a resonator installed on the ground (hereinafter referred to as a ground element), the oscillation frequency of the on-board oscillator is induced and changed to the resonant frequency of the ground element. This relates to an information transmission device that utilizes circling, and its purpose is to provide this type of device that makes it possible to check on the ground that information from the ground has been reliably transmitted to the vehicle.

Conventionally, information from a single beacon installed on the track, such as stop information in an automatic train stop (ATS) device, or information composed of a combination of multiple beacons installed on the track, For example, when transmitting deceleration control information for a fixed-position stopping device in automatic train operation (abbreviated as ATO) from the ground to onboard equipment, the frequency changing oscillator on the onboard reliably changes frequency to the resonant frequency of the ground element. There was no way to check on the ground whether this was the case.

The present invention surrounds one or more ground elements with a loop, receives a frequency changing frequency through this loop, checks on the ground side whether or not the oscillation frequency of the onboard oscillator has changed, and as a result, the frequency changes. If it is confirmed that this is not the case, appropriate action will be taken from the ground to the onboard equipment.

Embodiments of the present invention will be described below with reference to the drawings. The embodiment described next is a variable frequency ATS.
This is an example in which the system is provided with the functions of the present invention, and the information transmitted from the ground to the vehicle is composed of a plurality of ground transducers.

Figure 1A is a circuit block diagram of a multi-information on-board receiver that receives multiple pieces of information.The OSC normally oscillates at a frequency f ₀ using the on-board antenna CA, which consists of two loosely coupled coils, as a feedback circuit. The on-board oscillator SA _c0 is a selection amplifier with a frequency f ₀ , and its output drives the receiving relay MR _c0 . Also SA _c1 ~
For SA _co , the on-board oscillation frequency f ₀ is the ground element P ₁ to be described later.
These are frequency selection amplifiers that change frequencies to the respective resonance frequencies f ₁ to _fo of P _o , and drive the receiving relays MR _c1 to MR _co with their respective outputs.

Figure 1B shows the operation control circuit of the emergency brake command relay EBR, which is normally the operating contact of relay MR _c0 .
It is driven through MR _c0 (hereinafter, contacts are shown with the same symbol as the relay to which it belongs), and when the frequency changes after receiving information from the ground, it is driven through the operating contacts MR _c1 to MR _{co of} each receiving relay. . C in the same figure is a brake command generation circuit via operating contact EBR.
When this circuit is cut off by the restoration of relay EBR, an emergency braking command is issued to the vehicle. Note that, although there is a combination circuit of reception relay contacts that outputs reception information in the on-vehicle receiver, it is not shown in the figure because it is not directly related to the present invention.

FIG. 2 is a block diagram of ground equipment equipped with functions according to the present invention. In the figure, P ₁ , P ₂ , ... P _o are
A plurality of ground elements are arranged at required intervals along the track T, and when the onboard antenna CA of a vehicle C traveling from left to right on the track T passes over each ground element, When a resonant circuit with a set frequency is configured on the ground coil, the oscillation frequency f ₀ of the on-board oscillator OSC, which uses the on-board antenna CA as a feedback circuit, is attracted by the ground coil and changes to the resonant frequency. . This is the same as before, and now the ground wires P ₁ , P ₂ ,
……The resonance frequency set for P _o is
Assuming f ₁ , f ₂ , ... _fo , the oscillation frequency f ₀ on the vehicle changes to the respective resonance frequency f ₁ , f ₂ , ... _fo every time it passes over each element, Each time, one of reception relays MR _c1 to MR _co is activated. Therefore, the brake command relay EBR shown in FIG. 1B maintains its operation by the excitation circuit via any of the operating contacts MR _c0 to MR _co . (Note that the means for maintaining the operation of the relay EBR when switching _the contacts is publicly known, and its _explanation will be _omitted .) A reception loop coil L is installed to receive the oscillation frequency f ₀ generated by the on-board antenna CA and each variable frequency, and a selection amplifier SAg ₀ of the frequency f ₀ and a reception relay operated by its output are installed in this loop coil L. MRg ₀ , each selection amplifier SAg ₁ to SAg o with frequency variable frequencies f ₁ to f _o , and receiving relays MRg ₁ to _{MRg o that} operate on their respective outputs are connected, and the information setting unit IS to be sent to the vehicle is connected. Output information of the ground element control unit PC that sets the resonance frequency as information for the ground element P ₁ to _{P o} by the input of
A comparison unit CP is provided to compare the received information of the reception loop coil L provided through the operating contacts of the reception relays MRg ₀ , MRg ₁ to _{MRg o} .
A separately provided ground element Q having a resonant frequency f _x is controlled by the mismatch output generated by the CP.

Next, the operation of the above circuit will be described. First, when the information setting unit IS sets the information to be transmitted to the onboard vehicle, the wayside control unit PC sets the information to be transmitted to the wayside elements P ₁ to _{P o} according to the input from the information setting unit IS. At the same time, the information content corresponding to the set resonance frequency is output to the comparator CP. Now, when the vehicle C moves to the right in the diagram and the on-board antenna CA enters the loop coil L, the force with the on-board oscillation frequency f ₀ sent to the ground from the on-board antenna CA is induced into the loop coil L. and passes through its selection amplifier SAg ₀ to operate the receiving relay MRg ₀ . Subsequently, when the onboard antenna CA comes over the ground element _P1 , the onboard oscillation frequency _f0 changes to the resonant frequency _f1 set on the ground element _P1 , and the loop coil L has the variable frequency _f1. The current flows through its selection amplifier SAg ₁ to the receiving relay
Drives MRg ₁ . Similarly, each time the onboard antenna CA passes over the ground element P ₂ to _{P o} , the loop coil L receives a current with a frequency f ₂ to f _o that changes to the resonant frequency set for each ground element. flow and operate the respective receiving relays MRg ₂ to _{MRg o} .

The operation output of each of the above receiving relays MRg ₀ , MRg ₁ to _{MRg o} is sent to the comparison section via the operation contact of each relay.
It is input to the CP, and the ground control unit is inputted to the comparison unit CP.
It is compared with the information output of the PC. In other words, the operation of reception relays MRg ₁ to _{MRg o} means that the on-board oscillation frequency f ₀ has changed to the resonant frequency f ₁ to f _o of each device, so each reception relay
By comparing the operational outputs of MRg ₁ to MRg _o with the information output of the ground module control unit PC, it is possible to reliably check on the ground whether or not the on-board oscillator OSC is receiving information from each ground module. Can be done. If a discrepancy is found as a result of the comparison, the separately provided ground element Q is set and controlled to be a resonant circuit of frequency f _x using the discrepancy output from the comparator CP. Therefore, when the on-board antenna CA comes over the ground element Q in this state, the on-board oscillation frequency f ₀ changes to the resonant frequency f _x . However,
Since the receiver on the vehicle does not have a frequency f _x selection amplifier, the brake command relay EBR is restored after its excitation circuit is cut off, and issues an emergency brake command to the vehicle. It should be noted that when a match is found as a result of the comparison, the beacon Q is controlled to a cancel state by a known means, so that there is no effect on the on-board equipment.

The above embodiment is a case in which the present invention is applied to an ATS system that transmits a plurality of pieces of information from the ground to onboard a vehicle, but even when used in a system other than the ATS system, when a discrepancy is detected in the comparison unit CP, For example, it is possible to take appropriate measures for the vehicle, such as the above-mentioned brake control. Also, in the case of a single ground transducer, information transmission can be checked in the same way as above.

As explained above, the present invention reliably checks on the ground that information from the ground has been transmitted to the vehicle, and when the information received on the vehicle does not match the setting information on the ground, the information is transmitted to the vehicle. This system makes it possible to take appropriate measures such as commanding the emergency brake or issuing a warning, which has a remarkable effect on train operation safety. Even if the number of ground signals is limited, the amount of information can be significantly increased by setting the information by changing the number of combinations or the order of the combinations.

[Brief explanation of the drawing]

Figure 1A is a circuit block diagram of an on-vehicle receiver that receives multiple pieces of information, Figure B is a conditional circuit diagram of a brake command relay, Figure C is a brake command generation circuit diagram, and Figure 2 is a circuit diagram to which the present invention is applied. FIG. 2 is a block diagram of ground equipment showing an embodiment. OSC: On-board oscillator, CA: On-board antenna, P ₁ ,
P ₂ ~ _{P o} : Ground resonator, SA _c0 , SA _c1 ~ SA _co : Frequency selection circuit, MR _c0 , MR _c1 ~ _{MR co} : Receiving relay,
EBR: Brake command relay, L: Loop coil,
SAg ₀ , SAg ₁ ~ SAg _o : Frequency selection circuit, MRg ₀ ,
MRg ₁ to _{MRg o} : Reception relay, PC: Ground element control unit, CP: Comparator, Q: Ground resonator, IS: Information setting unit.

Claims (1)

[Claims] 1. Utilizes the fact that when the on-board antenna forming the feedback circuit of the on-board oscillator passes over a resonator on the ground, the constant oscillation frequency of the oscillator changes to the resonant frequency of the resonator. In the information transmission device from the ground to the vehicle, a circuit drives the relay by selecting the constant oscillation frequency, and a resonant frequency of a resonator provided corresponding to the information transmitted from the ground to the vehicle is selected. A circuit that drives a relay, an on-board device that includes a relay circuit that outputs information sent from the ground through a combination of the operations of each of the relays, and a ground resonator that is provided in correspondence with the information to be transmitted. a loop coil that receives guided waves from the on-board antenna; a circuit connected to the loop coil that selects the above-mentioned constant oscillation frequency and drives the relay; and a circuit that selects the above-mentioned resonance frequency and drives the relay; A comparison circuit for comparing the operating outputs of these relays with the output information of the ground element control unit that controls the resonance frequency setting of the ground resonator, and the discrepancy output of this circuit sets a resonance frequency different from the set resonance frequency of the ground resonator. and a ground device including a resonator or the like provided on a line outside the loop coil, separately from the ground resonator, so that the setting of the different resonance frequencies is canceled by the coincidence output of the comparison circuit. What is claimed is: 1. An information transmission device comprising: checking on the ground whether information from the ground has been transmitted to the vehicle; 2. The information transmission device according to claim 1, wherein the ground device is provided with an information setting unit that outputs a setting command for a resonance frequency corresponding to information to be sent onboard the vehicle to the ground control unit.