JPH0573626B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is capable of tracking trains that can perform level crossing warning control by storing the number of trains in a warning control section by detecting trains at the start and end points of the railway crossing warning control. This invention relates to a point-controlled level crossing control device.

[Conventional technology and its problems]

Conventional point-controlled level crossing control devices perform level crossing control using simple relay logic circuits based on the operation of train detection relays such as level crossing controllers and track relays, so they are resistant to unstable operation of level crossing controllers and track circuits. If these conditions lead to unstable operation, the circuit is prone to erroneous control such as sustained alarms or no alarms. In addition, a separate level crossing controller is required as a countermeasure against no-warning for continuing trains. The disadvantages were that the circuit was complex and each level crossing was individually designed.

[Means for Solving the Problems] The present invention eliminates the above-mentioned drawbacks and enables high reliability and standardization. It prevents erroneous control due to unstable operation of train detection input conditions, and provides a continuation countermeasure. This provides a point-controlled level crossing control device that eliminates the need for a level crossing controller and enables standardization of control circuits.This device provides a point-controlled level crossing control device that eliminates the need for level crossing controllers and enables standardization of control circuits. A train detection circuit that inputs train detection conditions, memorizes the train from its entry to the train detection point to its exit, and can correct the input conditions to normal even if they operate incorrectly; a circuit that stores the operating order of the train detection circuit at the alarm starting point and the train detection circuit at the alarm ending point for each train; It is subtracted when the train advances from the alarm end point, and when the predetermined operation order is not satisfied when the train detection circuit at the alarm end point operates, and even after a certain period of time has passed after the train enters the alarm start point, the alarm end point operates. A counting circuit for counting the number of trains in the level crossing warning control section is equipped with a control means that stops addition and subtraction when there is no train in the warning control section. The feature is that it can be controlled.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.
Figure 1 is a track diagram for a double-track system, and shows a third embodiment of the device that performs alarm control with the starting point of the level crossing warning being A and the ending point B, and the starting point being C and the ending point being D. It is a circuit diagram shown in a figure. Figure 2 is a track diagram for a single track, and Figure 4 shows an example in which the alarm control is performed with the starting point of the level crossing alarm being E and the ending point being G, and the starting point being F and the ending point being G. This is the circuit shown.

Train detection output from train detectors such as level crossing controllers and track circuits installed at alarm start points and alarm end points A, B, C, D, E, F, and G in Figures 1 and 2. The conditions are Ta, Tb, Tc, Td, Te, Tf, Tg in Figures 3 and 4.
is entered as . In the circuit block diagram of Figure 3, TI is a train detection circuit that can correct even if the train detection conditions operate incorrectly, as shown in Figures 5 and 6, and DC is a train detection circuit as shown in Figures 7 and 9. Train tracking and control circuit for double track operating;
TC is the final control output circuit. Also, in Figure 4, TI and TC are the same as in Figure 3, and SC
is a single track train tracking and control circuit which operates as shown in FIGS. 8 and 10.

An embodiment for a double track will be described based on FIG. 3. Among the train detection input conditions, for example, the up direction
Input conditions such as Ta, Tb, and down direction as Tc, Td are input to TI, respectively. A specific example of TI is shown in Figure 5, and its operation is shown in Figure 6. In Figure 5, TIA is a storage circuit for train detection conditions, TIB and TID are timer circuits, and TIC is a correction circuit for train detection input conditions. It is. When train detection input condition i is input, Figure 6
As shown in the time chart in a, it is stored in TIA, but at the same time, the monitoring time m to ensure that the input conditions operate stably and is confirmed as reliable information is TIB.
Set by. When TIA maintains the same content after m elapses, TIC determines it as stable train detection data and outputs data as shown in d to o.
At the same time, the monitoring time n to correct the incorrect input i that occurs until the continuing train approaches is
Set by TID. The value of n is calculated based on the speed of the train and the distance of the block section, but it is sufficient to monitor the time from the time the train passes the train detection point until the next train enters.
TIC will correct any invalid train detection input during n setting and reject it. No. 6a-2 is an example in which an illegal input was made during the n setting, and the data is not adopted and is not output to the output d. The DC in Fig. 3 receives the output from the TI and performs train tracking and alarm control in the warning section. Fig. 7 shows a specific example of the DC, and Fig. 9 shows the operation of the DC. In Figure 7, SCA is a memory circuit for the state where the train is on the line above the alarm starting point, and SCB is a memory circuit for the state where the train is on the line above the alarm end point.
The SCC is a memory circuit for the state in which the train is on the line between the warning start point and the warning end point. Now, when the train enters the warning starting point, the conditions are input from s, and the SCA
The SCD adds the number of trains based on the output e from the .
At this time, when the number of trains reaches 1 for the first time, h is set and an alarm control is output to t. If the number of trains has already been counted at this time, this indicates that a train is being detected due to a continuing train, and the system is already under alarm control.
When the train advances beyond the warning starting point, the SCA resets e and f is set by the SCC. When the train approaches the warning end point, conditions are input from r.
f is reset by the output g from SCB. When the train advances past the alarm end point, the SCB resets the output g, and the SCD subtracts the number of trains until the number of trains becomes 0.
When this happens, h is reset and the alarm control is canceled. The SCD monitors the order of operations of e, f, and g as the train runs, and if the order of operations is not normal, it is possible to determine a failure and maintain alarm control. Furthermore, by monitoring the time from e to g, for example, it is possible to determine a failure in the case where a train cannot be detected even though the train has passed due to a failure of the train detector at the warning end point. In FIG. 3, DC is provided for each upstream and downstream direction, and TC provides the final alarm control output T by ORing each alarm control.

Next, an embodiment using a single wire will be described based on FIG. 4. FIG. 8 shows a specific example of a single-line SC, and FIG. 10 shows an example of its operation. The train detection condition Tg for the warning end point is common to both the up and down directions; for example, if the down direction warning start point is Te, the up direction warning start point is Tf. Now, to explain the case where a train is traveling in the down direction as an example, when the train enters the warning starting point, stable train detection data output from the TI is input to s of the SC. The SCJ adds the number of trains based on the output i of the SCE, and when the number of trains reaches 1 for the first time, sets n and outputs an alarm control to t. When the train advances beyond the warning starting point, the SCE sets i and j is set by the SCF. When the train approaches the warning end point, r
The train detection conditions are input from , and the output from SCG is k
j is reset by When the train advances beyond the warning end point, the SCH is reset by resetting k from the SCG.
sets l, SCJ subtracts the number of trains, and when the result is 0, cancels the alarm control. Also, at the same time SCJ
adds the number of trains on the escape side to confirm that the train has passed from the alarm ending point to the escape side starting point. When the train approaches the starting point on the exit side, SCI sets m and SCH resets l based on the condition input from c. SCI occurs when the train advances beyond the exit side starting point.
By resetting m, SCJ subtracts the number of trains on the deviating side. In this way, the SCJ monitors the order of operations of i, j, k, l, and m as the train travels, as well as the track status, and can reliably determine whether a train is passing. In FIG. 4, TC is an alarm control output circuit for a single line, and outputs to T only when the output from the SC provided separately for the up and down directions is either one.

〔Effect of the invention〕

As explained in the above embodiment, the point-controlled level crossing control device capable of train tracking according to the present invention is capable of correcting conditions for detecting an unstable train, and therefore can provide stable warning control and continue operation. It is possible to provide a standardized control circuit that eliminates the need for a level crossing controller for train countermeasures and uses only the train detection conditions at the alarm start point and alarm end point.

[Brief explanation of the drawing]

Fig. 1 is a double-track track diagram, Fig. 2 is a single-track track diagram, Fig. 3 is a double-track embodiment of the present invention, Fig. 4 is a single-track embodiment of the present invention, and Fig. 5 is a specific example of the train detection circuit. As an example, Fig. 6 is a time chart for explaining the same, Fig. 7 is a specific example of a train tracking and control circuit for double track, Fig. 9 is a time chart for explaining the same, and Fig. 8 is a time chart for train tracking and control circuit for single track. FIG. 10 is a time chart for explaining the control circuit. In addition, A, C, E, F... alarm starting point, B,
D, G...Alarm end point, TI...Train detection circuit,
DC...Train tracking and control circuit for double track, TC...
Control output circuit, SC...train tracking and control circuit for single track, TIA...memory circuit, TIB...timer circuit, TIC...correction circuit, TID...timer circuit,
SCA, SCB, SCC, SCE, SCF, SCG, SCH,
SCI...memory circuit, SCD...double track control circuit,
SCJ...Single wire control circuit.

Claims (1)

[Scope of Claims] 1. A point control type level crossing control device having a train detection circuit TI and a counting circuit SCD, wherein the train detection circuit TI has a correction means, and the train detection circuit TI has a correction means, and the alarm of the level crossing alarm control section A to B is Input the train detection condition signal Ta that is generated while the train is passing through the train detection point A at the start point, and the train detection condition signal Tb that is generated while the train is passing through the train detection point B at the alarm end point, and The monitoring time (m) from when a train enters to train detection points A and B is memorized respectively, and the system temporarily turns OFF even though there is a train due to an unstable detection condition, and then returns to ON again. Even if the detection output operates incorrectly during the monitoring period m, the incorrect OFF state is corrected to a continuous ON state, and the counting circuit SCD has operation order storage means e, f,
g and control means, and operation order storage means e,
f, g are memory e of the state where the train is above the alarm starting point
, a memory g of a state in which a train is above the alarm end point, and a memory f of a state in which a train is between the alarm start point and the alarm end point, and a train detection when the train passes the alarm start point and the alarm end point. According to the conditions Ta and Tb, when the train enters the warning starting point A, the train is stored in correspondence with a certain sequence e→f→g of passing through the starting point and then passing through the ending point. When the train passes the warning end point B, the output t of the counting circuit is added to the warning end point B, and the output t of the counting circuit is used to perform the level crossing warning control T while the train is in the warning control section A to B, and detect the train at the warning end point B. Addition and subtraction are stopped when the predetermined operation order e → f → g is not satisfied when circuit TI is activated, or when there is no operation g at the alarm end point even after a certain period of time has passed since the train entered the alarm start point A. This is a point-controlled level crossing control device that stops the level crossing warning control.