JPS598558A - Train detector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This transmitter 1jJl transmits two types of onboard signals that are constantly and continuously transmitted from an onboard transmitter installed at the front and rear of the train. The present invention relates to a continuous transmission/reception type train detection device f which receives data through an induction loop provided for each required section and constitutes a block logic.

Generally, in the continuous transmission/reception type train detection device H, the first
As shown in the figure, a ground transmitter l is connected to a continuous guidance loop t for each section provided on the running path of a train T.
The reference signal rc is continuously transmitted by the receiver 2 provided at the curved end of the induction loop t.
c. The control signal is received by the box C and amplified by 1g, and the control signal receiving relay CI■ is always activated by the reception output jJ, and when the train T enters the section, the onboard transmitter The on-board signal f transmitted from the antenna of
or F2 is received via the induction loop L, the receiving circuit F, , R4 or F2 . R
The on-vehicle signal reception relays FA, R, or FA 2 are operated via the control signal fc, and the reference signal fc is suppressed, so that the reference signal reception relay CHR is restored.

Usually, a square wave amplitude modulated wave is used for the on-board signals f, f2, and the transmitters at the front and rear of the train check phase U for normality, and if there is an abnormality in one of the transmitted signals, When this occurs, the other signal is not modulated to notify the user of the occurrence of an abnormality in one of the transmitters. On-board signal reception relay J ("Δ, R, Ii" A2) operates only when it receives a modulated wave, and recovers when it receives a non-modulated wave.On the other hand,
The reference signal reception relay 0J (R is restored when the on-board signal is received, regardless of whether the on-board signal is a modulated wave or an unmodulated wave. The operation of each of the above relays is combined, as shown in Figure 2. A block logic circuit (717) is constructed to perform train detection. In Figure 1, ZT and YT indicate the block section, and in Figures 1 and 2, the head zT and 'l'
ZT and YT in the symbols with T added also have the same meaning.

By the way, as shown in Fig. 2, the block logic circuit in the conventional continuous transmission/reception type train detection system is as follows: Connect the relay contact ZTJ"A2r l Y'f'FA2r and O train detection relay ZTR and the contact YTr of the train detection relay in the front block section in series, and connect the train detection relay contact YTr in the block section 1 in series.
Contact point ZTr of train detection relay ZT between × +7iJ Contact point of onboard signal receiver 1 word relay ZTFA2r l YTF
A2r- and contact Y of the train detection relay in the front block section
In Fig. 3, if train T is connected in parallel to the Tr, when train T is dependent on the force direction of one block section XT and train T2 is transferred to block section 114JYT, the gloves signal receiving relay ZTFA2H is Operation and verification signal reception relay Z
Since the operation of TCjHR is necessary as a condition for operating the train detection ring-ZTR, as shown in Fig. 4, the recovery time element t1 of the on-board pick-up reception relay is set to the operation time element of the check signal reception relay. [It is longer than 2. Therefore, the conventional device has the following problems.

In other words, the probability that the front and rear transmitters on the vehicle will stop transmitting due to failure at the same time or almost simultaneously is extremely low by providing each device with a redundant system or by using separate power systems for the front and rear transmitters. However, for some reason, when the train is turned off, such as when the train enters the depot, the front and rear power sources of the train may be turned off at the same time. In such a case, the on-board signal f, ,
Since F2 stops transmitting at almost the same time, on-board signal receiving relays ZTFA and R in FIG.

Z'T"FA2T(returns to 11, and the reference signal receiving relay Z'l'(JR) is lifted up, but as shown in FIG. 4, the lifting time element t2 is shorter than the recovery time Nt1, so If there is a train on the induction loop of the adjacent forward block section, the fourth
Each condition for operating the train detection relay ZTR is temporarily satisfied within time F3 in the figure. Once the train detection relay operates, it maintains its operation via contacts ZTr and Z'T'CJ(r) even after the on-board signal reception relay is completely disconnected.

Therefore, although there is a train in the block section ZT, there is a serious drawback that only the train can be detected.

In view of the above-mentioned points, this invention provides a continuous transmission/reception type train detection system that uses two types of train detection systems that can constantly transmit signals from the front and rear parts of the train. To enable a train to run in Yanagawa using ffW even if both upper signals are stopped transmitting at exactly the same time or almost at the same time.

In order to achieve the above-mentioned object, this invention has a difference between the recovery time element of the on-board signal receiving relay described in MiJ and the take-up time element of the reference pick-up receiving relay. Focusing on the fact that the operating conditions for the train detection relay are temporarily met, when any of the onboard signal reception relays is activated, the same relay is on the verge of falling again, and the operation of the train detection relay is prohibited. is a basic functional feature.

Next, one example of this invention will be explained based on the drawings from FIG. 5 onwards.

Fig. 5 shows a block logic circuit used in the train detection device according to the present invention.
This part is a logic circuit that can be used to implement the present invention.

In other words, the additional message 11 (b) is that the on-board message is received L/
-ZTFA, R, ZTFA, , R falling contact ZTFA,
Connect a slow-acting reaction relay ZR in a 1σ series to the parallel circuit in which r, ZTFA, and r2 are inserted, and
It is constructed by inserting the lifting contact zr of the anti-single-core relay into the power supply circuit of the train detection relay ZTR of the conventional block logic circuit. Here, the reaction relay ZR is set to the on-board signal reception relay ZTFA, R, or ZTFA2R, whichever recovers earlier, but recovers later from the point of recovery (when the current/voltage falls below the set value). A relay having a launch time element 14 of length equal to the time interval past the time point is used.

By providing an f-additional logic circuit with such a configuration,
Now, under the condition that there is a train in the block section ahead, the onboard signal f of the train that has entered the block section rf4JK, ,
When f2 becomes a transmission stop +h at almost the same time, two on-board signal reception relays ZTFA, R, and ZTFA2 all return even if the reference signal relay Z'rC)-IR operates.
] until the reaction relay ZR becomes the train detection relay ZTR
Since the power supply circuit is open, the logic circuit (
In a), the contact point ZTFA2 r of the on-board signal reception relay
+ Y'I'FA 2 r, even if the contact YTr of the train detection relay in the forward block section and the contact ZTOf-11 of the check signal receiving relay are temporarily closed, the Train detection relay ZTR does not operate and therefore also does not self-hold its operation via contact ZTr.

As described above, according to the present invention, when the on-board signal receiving relay is restored, the reaction relay 1) is thrown 1, and the reaction relay is dropped. Since the VCL is set to prohibit the operation of the queue detection relay when the train is running, even if the transmission is stopped at the same time, the transmission will be stopped at the same time. Detection on the line + jfi; It can be really bad.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a schematic circuit configuration of a general continuous transmission/reception type train detection device; Fig. 2 is a diagram showing a block logic circuit in a conventional device; I is a train layout diagram, Figure 4 - Quino Char showing the operation of the circuit, Figure 5
Figure 1 C2 shows an embodiment of this invention. The circuit diagram, Fig. 6, shows the f, i: Ill of the same circuit. R, ZTFA2T (...Onboard signal receiver 1-word relay z'rI (...Train detection relay Zn2...Reaction relay

Claims (1)

[Claims] A continuous guidance loop is provided for each section on the train's running route, and a ground transmitter transmits an inspection signal from one end of the guidance loop, and a receiver transmits a control signal from the curved end of the guidance loop. Receiving the reference signal and keeping the reference signal receiving relay operating at all times based on the received output;
Different frequencies f, , and , are applied to the front and rear parts of the train, respectively.
A transmitter is provided which generates an onboard signal of f2, and when the train enters the induction loop, the onboard signal fI or f2 suppresses the inspection signal to restore the inspection signal reception relay, and An onboard signal receiving relay is provided that operates when the suffix onboard signal f2 is received from the induction loop, and the train detection relay is configured by combining the conditions of the MiJ reference signal receiving relay and the onboard signal receiving relay. In the continuous transmission/reception type train detection device, a reaction relay is provided which operates slowly with the required Egami time when the on-board signal reception relay is fM ll, and the reaction relay is activated when the signal is dropped. A train detection device characterized in that the operation of the train detection relay is prohibited when the train detection relay is present.