JP6054768B2 - Track circuit device - Google Patents

Description

  The present invention relates to a track circuit device. For example, in a railway, the present invention relates to a track circuit device having a function of detecting whether a train exists in a specific section on a track and determining a presence / absence line.

  As a background art in this technical field, there is JP-A-2008-56160 (Patent Document 1). In this publication, the problem is that, in an uninsulated track circuit, the control level is determined by performing level learning even when the current reception level cannot be changed to the control level or when the current steady reception level cannot be set as the control level. , Ensuring safety in non-insulated track circuits ”, and as a solution to this, it is determined that the track circuit has fallen if the reception level is below the drop judgment level, and if it is above the saddle judgment level, the track circuit In the track circuit that is determined to be the top of the track, in the non-insulated track circuit, three types of control level candidate values are considered in consideration of the train track status of the track circuit and the adjacent track circuit, and the control level candidate values with high priority are controlled. Level ”.

JP 2008-56160 A

The track circuit device includes an insulated track circuit method and an uninsulated track circuit method.
In the insulated track circuit system, the insulation between two places on the rail is regarded as one track circuit, the transmitting device and the receiving device are connected to both ends of each track circuit, and the train detection signal transmitted from the transmitting device is The signal is received by the receiving device via the track circuit, and the presence / absence of the track circuit is determined from the reception level.

  FIG. 1 shows the reception level 16 of the track circuit 2 in the insulated track circuit. The train 10 receives the reception level 16 from the track circuit 1 to the track circuit 2 and the track circuit 3. It is a characteristic view which shows a mode that it changes.

In the figure, the horizontal axis represents the position of the train 10 and the vertical axis represents the reception level of the track circuit 2.
In addition, a plurality of vertical lines 18 on the track circuits 1, 2, and 3 in the figure mean insulation and are boundaries of the track circuit 2.
Also, the alternate long and short dash line 14 in the figure indicates the fall determination level. When the reception level 16 falls below the fall determination level 14, the track circuit 2 falls, that is, the train 10 is a rail (hereinafter referred to as a track) section. Is present on the track circuit 2, that is, it is determined that the train is on the track.

  Here, the estimated value of the reception level 16 when the train is not present is referred to as a control level, and the fall determination level 14 for determining the presence / absence line / the uplift determination level is determined from the control level. The control level and the lifting determination level will be described later.

In the insulated track circuit system, when the actual train 10 enters the track section of the track circuit 2, the reception level 16 in the section rapidly decreases as shown in FIG.
Therefore, by detecting the decrease in the reception level 16 at this time, it is possible to determine that the track circuit 2 is on the train.
At this time, in the track sections of the track circuits 1 and 3 before and after the track circuit 2, there is almost no change in the reception level 16 except for the change due to the weather, and a stable level is maintained at the drop determination level 14 or higher.

On the other hand, in the non-insulated track circuit system, insulation (18 in FIG. 1) is not provided on the line, and the connection between the transmitter and the receiver (between track circuit boundaries 15 and 15) is regarded as one track circuit, The presence / absence line is determined from the change in the reception level 16 as in the insulated track circuit system.
Since there is no insulation between adjacent track circuits, the train 10 is in the area of the track circuit 1 and before the start of entering the track circuit 2, the reception level 16 fluctuates gently, and the train 10 and the track circuit boundary A phenomenon called boundary deviation occurs between the two.

Next, this boundary shift will be described.
FIG. 2 is a characteristic diagram showing the reception level 16 of the track circuit in the non-insulated track circuit and the change of the reception level 16 of the track circuit 2 as the train 10 travels.
A circle portion 15 of the track circuit portion in the figure is a track circuit boundary of the non-insulated track circuit.

  In the figure, when the train 10 travels from the track section of the track circuit 1 toward the track section of the track circuit 2, the reception level 16 of the track circuit 2 starts to decrease before the train 10 enters the track section of the track circuit 2. The track circuit 2 is determined to be on the train before the boundary between the track circuit 1 and the track circuit 2.

  As described above, the boundary position between the actual train position when the existing line of the train 10 is detected and the track circuit 2 is shifted, that is, the tip of the train 10 in the track section of the track circuit 1 and the track circuit of the track circuit 2. A positional deviation from the boundary 15 is referred to as a boundary shift.

  In order to correctly control the train 10, the train control signal transmitted from the transmission device at the boundary between the track circuit 2 and the track circuit 3 is transmitted even at a position far from the track circuit boundary 15 due to the boundary shift described above. The train 10 needs to receive at a sufficiently large level.

  However, as the distance between the train 10 and the transmission device increases, the level of the signal from the transmission device generally decreases. Therefore, for example, if the level of an automatic train control signal (hereinafter referred to as an ATC signal) received by the train 10 is too small, measures such as an emergency stop of the train 10 must be taken for the train safety operation. This will lead to a decrease in operating rate in train operation.

  For example, during bad weather such as rain, a signal flows through the water between the two tracks, and the reception level 16 is lower than when dry. Due to the decrease in the reception level 16, the boundary shift during bad weather becomes larger than that during dry weather.

  FIG. 3 shows changes in the reception level 16a during bad weather and the reception level 16b during drying in a non-insulated track circuit. The traveling direction of the train 10 is the same as in FIG.

  In the same figure, when the drop judgment level 14 is a value calculated from the reception level 16b at the time of drying, if the train travels when the level drops to the reception level 16a at the time of bad weather due to the weather, the reception at the time of drying is received. From level 16b, the reception level 16a in bad weather is further below the fall determination level 14, and it is determined that the track circuit 2 is in the line.

  In addition, since the level of the train control signal is low as in the case of the train detection signal during bad weather, it becomes more difficult to receive the ATC signal at a sufficiently large level in combination with the distance being increased.

  A control level determination method using level learning is used as a method of correcting the above problem and increasing the operation rate.

  For example, Patent Document 1 describes a track circuit device that employs a train detection method that changes a control level in accordance with a reception level that changes every moment according to changes in weather.

  In this control level determination method based on level learning, even if the weather is slightly worse after drying, the control level is made to follow the lower side so that the boundary deviation does not extend.

  Following the change in the reception level due to the weather and lowering the control level below the control level of the previous cycle leads to an increase in the operation rate. On the other hand, it can be said that it is an action that approaches the unsafe side in that the track circuit is less likely to be dropped.

  The unsafe event means that if the train is on the track with the control level lowered by level learning during bad weather, and if the train continues to stay on the track, drastic drying occurs, the control level will not change and only the reception level will remain. Rises, and it is determined that the train is not present although the train is present.

  In the level learning shown in Patent Document 1, in order to deal with the unsafe side event, “the level learning lower limit value is a value within the premise that the track circuit is within the precondition range after the level learning in the downward direction and before the next level learning. In case of a transition, it is considered to be a value that will not be judged on the track circuit regardless of the train line.In addition, the level learning lower limit value is the type of track circuit (insulation presence / absence, presence / absence of a switch, It is determined in consideration of leakage conductance and signal frequency), track circuit length, and short-circuit sensitivity.

  In a track circuit device with a small fluctuation level (falling width) of the reception level when the train is on the track circuit, if the above-mentioned restrictions are applied, the level learning in the downward direction is not performed, thereby avoiding the unsafe side event. Will be.

  On the other hand, not performing the level learning in the downward direction has a problem that the boundary shift becomes large, and it becomes more difficult to receive the ATC signal at a sufficiently large level, and the operation rate is lowered. I understood.

  Therefore, the present invention provides a track circuit device that can increase the operating rate without sacrificing safety even in a track circuit device having a small fall width.

  In order to solve the above-described problems, the present invention provides a track circuit device in which the control level candidate value is corrected in the next cycle when the control level candidate value is within a certain range when the control level is determined. It has a judgment level determination means for setting a level.

  According to the present invention, it is possible to provide a track circuit device that can achieve both availability and safety even in a track circuit with a small drop width.

For example, by accurately defining the fluctuation range in which the boundary deviation can be tolerated from the initial value of the control level, safety is enhanced in the range where the boundary deviation does not affect the operation rate, and the boundary deviation is large enough to affect the operation rate. In such a case, a track circuit device having a high operating rate can be provided without sacrificing safety by lowering the minimum control level within a range in which safety can be ensured and reducing boundary deviation. .
Problems, configurations, and effects other than those described above will become apparent from the following description of embodiments.

It is a characteristic view explaining the reception level change of an insulated track circuit. It is a characteristic view explaining the reception level change of a non-insulated track circuit. It is a characteristic view explaining the reception level change at the time of bad weather of a non-insulated track circuit. It is a block diagram which shows the system configuration | structure of the track circuit apparatus of this invention. It is a block diagram explaining the mode of the detection of the train detection signal by the track circuit apparatus shown in FIG. It is a characteristic view explaining the temporal change of the reception level at the time of train presence / absence. It is a figure explaining the example of collection of several control level candidate values 1, 2, 3, ..., m. It is a schematic diagram which shows notionally the method of determining the control level candidate value B. It is a schematic diagram explaining the control level determination method. It is a block diagram which shows the example of 1 structure of the determination level determination means of FIG. It is a flowchart explaining the process which determines the control level candidate value A. 12 is a flowchart illustrating a process of determining a control level candidate value B from the relationship between the control level candidate value A and the control level candidate value B of the previous cycle in FIG. 12 is a flowchart for describing processing for determining a control level of the next cycle from the control level candidate value B of FIG. 11. It is a flowchart explaining a process when a train continues on-track to the said track circuit and an adjacent track circuit.

Hereinafter, examples will be described with reference to the drawings.
The track circuit device of the present invention transmits, for example, a signal for detecting whether a train is present on an uninsulated track circuit, and receives the transmitted signal via the track circuit; and A control device that determines the reception level of the received signal, determines that the track circuit is falling when the reception level is equal to or lower than the drop determination level, and determines that the track circuit is lifted when it is equal to or higher than the lift determination level; In a track circuit device having
Considering the train track status of the track circuit and the adjacent track circuit adjacent to the track circuit, the reception level of the track circuit is collected as a control level candidate value of the track circuit, and based on the control level candidate value, A level learning unit that determines a control level that is an estimated value of the reception level when the train is not present, and a variable control of the control level following the fluctuation of the reception level, and the fall determination based on the control level A determination level determining means for determining a level and the above-mentioned determination level,
When determining the control level, when the control level candidate value is within a certain range, the corrected control level candidate value is used as the control level of the next cycle.

  In the track circuit device, the certain range is above the lower limit value of the control level minus the lower learning start level, and is within the range below the initial value of the control level.

  In the track circuit device, when the control level is determined, if the difference between the control level candidate value of the previous cycle and the control level candidate value of the next cycle is outside the specified range, the control level of the next cycle is set to the previous cycle. The control level candidate value is corrected to a value within a specified range.

In the track circuit device, the level learning unit includes:
When the track circuit and the adjacent track circuit are all up in the range of the level learning cycle, collection of control level candidate values of the control level is started, and the average value of the received level of the track circuit for a certain time Is a control level candidate value,
The determination level determination means includes
When none of the control level candidate values can be collected and the state continues for a certain period of time, the control level is changed to the initial value only if the control level is the initial value of the control level> the control level. ,
If the control level is the initial value of the control level ≦ control level, do not change the control level,
Thereby, the disappearance of the on-line recognition of the train due to a rapid dry transition at the time of the on-line of the train is prevented.
Specific examples thereof will be described in detail below.

FIG. 4 is an example of a system configuration of the track circuit device according to the present embodiment.
In the figure, n track circuits (1, 2,..., N) are provided in order to detect the position of the train 10 traveling on the track.

  Between the track circuits of the n track circuits (1, 2,..., n) are non-insulated track circuits that are not separated by an insulator, and signals from other track circuits flow into each track circuit.

  A transmission / reception device 11 that transmits and receives a train detection signal (hereinafter referred to as a TD signal) to the track circuit 1 is connected to both ends of the track circuit 1. Similarly, a transmission / reception device is connected to both ends of each of the track circuits (2,..., N).

  In FIG. 4, the transmission / reception device 11 connected to the track circuit 1 side of the track circuit 2 to the transmission / reception device 1n connected to the other side of the track circuit n are shown.

  The transmission / reception device 11 includes a modulation unit 21, a transmission unit 31, a reception unit 41, a demodulation unit 51, and a reception level calculation unit 61. Further, the transmission / reception devices (12,..., 1n) are the same as the transmission / reception device 11. Each transmitting / receiving device (11, 12,..., 1n) is connected to the ground control device 100 via the network 170.

  And these transmission / reception apparatuses comprise the train detection apparatus which transmits the TD signal with respect to a track circuit, receives the TD signal from a track circuit, and detects whether the train 10 exists on a track.

  The ground device 100 includes a track management unit 110, a reception level determination unit 120, a track detection result determination unit 130, a train track determination unit 140, a signal control unit 150, a level learning unit 180, a determination level determination unit 190, and a display unit 160. Have.

  The standing line management unit 110 manages the standing line of the train 10. The reception level determination unit 120 determines whether or not the track circuit is lifted / dropped based on the reception level of the TD signal received by the transmission / reception devices (11, 12,... 1n).

  The presence line detection result determination unit 130 receives the determination result of the reception level determination unit 120 and determines the possibility of the presence / absence of the train 10. The train presence line determination unit 140 determines the presence / absence line of the train 10.

  The signal control unit 150 controls the train 10 according to the determination result of the presence / absence of the train 10 by the train presence determination unit 140.

The level learning unit 180 determines the control level (the estimated value of the reception level when the train is not present) from the determination result of the presence / absence of the train 10 and the reception level of the TD signal. As the control level, the reception level is corrected, and the corrected reception level is set as a control level candidate value. Determination level determination means 190 determines a fall determination level and a lifting determination level from the control level.
The display unit 160 displays the determination result of the presence / absence of the train.

  In addition, the standing line management unit 110 includes a telegram signal creation unit 111 and a standing line detection result information storage unit 112.

  The message signal creation unit 111 creates a different message signal for each transmission / reception device (11, 12,..., 1n). The telegram signal is, for example, an ATC signal or a TD signal. The standing line detection result information storage unit 112 stores the train standing line determination result.

  FIG. 10 is a configuration diagram illustrating a configuration example of the determination level determination unit 190 of the level learning unit 180.

  In the figure, the determination level determination means 190 includes a control level determination means 191 and a fall determination level / lifting determination level determination means 192.

  The control level determination unit 191 receives the determination result of the presence / absence of the train 10 in the train presence determination unit 140 and the reception level of the reception level determination unit 120 to determine the control level. The fall determination level / lifting determination level determination unit 192 receives the control level of the control level determination unit 191 and determines the fall determination level / lifting determination level for determining the presence / absence of the train 10.

Next, the configuration of the transmitting / receiving apparatus will be described in detail.
The transmitting / receiving devices (11, 12,..., 1n) use different parts depending on whether the transmitting device or the receiving device is used.

  When transmitting / receiving a signal in the transmission / reception device 11, a modulation unit 21 that modulates the message signal of the message signal generation unit 111 by MSK (Minimum Shift Keying) and a transmission unit 31 that transmits the message signal to the track circuit 1 as a TD signal are used. To do. When the signal is received by the transmitter / receiver 11, the receiving unit 41 that receives the TD signal from the track circuit 1, the demodulating unit 51 that demodulates the TD signal received from the track circuit 1, and the TD signal received from the track circuit 1 Used by the reception level calculation unit 61 for calculating the reception level.

  Next, the operation | movement including the detection process of a train line in the track circuit apparatus of the said structure is demonstrated using FIG.5 and FIG.6.

  The ground control device 100 creates a telegram signal Sds by the telegram signal creation unit 111 of the on-line management unit 110 and transmits the telegram signal Sds to the transmission / reception device 11 via the network 170 in order to perform the train presence line detection process. To do.

  The transmission / reception device 11 receives the telegram signal Sds transmitted from the ground control device 100, modulates it with a predetermined frequency by the modulation unit 21, and transmits the modulation telegram signal Sa from the transmission unit 31 to the track circuit 1 as a TD signal. However, since the track circuit is not insulated, a signal is also transmitted in the opposite direction to the track circuit 1.

  The transmission unit 31 of the transmission / reception device 11 and the reception unit 41 of the transmission / reception device 11 are connected by the track circuit 1. Therefore, the modulated telegram signal Sa transmitted to the track circuit 1 is transmitted as a TD signal to the receiving unit 41 of the transmission / reception device 11 through the track circuit 1 by the track circuit transmission.

The transmission / reception device 11 receives the telegram signal Sa modulated from the track circuit 1 by the reception unit 41 as a TD signal, and the demodulation unit 51 demodulates the telegram signal Sa. Further, the reception level calculation unit 61 calculates the reception level of the received telegram signal Sa (TD signal).
Further, the transmission / reception device 11 transmits the demodulated signal Sdr of the demodulation unit 51 and the reception level of the reception level calculation unit 61 to the ground control device 100 via the network 170.

  The ground control device 100 receives the demodulated signal Sdr and the reception level 16 of the telegram signal Sa (TD signal) from the transmission / reception device 11, and the reception level determination unit 120 determines whether the reception level 16 is equal to or lower than the drop determination level 14. It is determined whether the upper determination level is 19 or more (see FIG. 6).

  The drop determination level 14 and the lifting determination level 19 are calculated based on a control level 17 described later. The control level 17 is determined according to the situation of the reception level 16 of the TD signal. Details will be described later.

  FIG. 6 shows a temporal change in the reception level 16 when the train is on / off. When the train 10 is in the track section of the track circuit, for example, the track circuit 1, the track is short-circuited by the axle of the train 10, so that the TD signal sent from the transmission / reception device 11 to the track circuit 1 is received by the transmission / reception device 11. In this case, as shown in the figure, the reception level 16 is lowered and becomes the drop determination level 14 or less. When the train 10 is not present, the reception level 16 at the transmission / reception device 11 does not decrease, and becomes the uplift determination level 19 or higher.

  FIG. 6 shows an example in which the fall determination level 14 is set to, for example, 10 dB below the control level 17, and the uplift determination level 19 is set to, for example, 8 dB below.

The drop determination level 14 and the lifting determination level 19 are determined by the determination level determination unit 190 based on the control level 17. Level learning is a method in which the level learning unit 180 determines a control level.
In this example (FIGS. 4 and 5), the determination level determination unit 190 is installed in the level learning unit 180. However, the determination level determination unit 190 may be configured separately from the level learning unit 180. is there.

Next, level learning in the present embodiment will be described first with reference to FIGS.
Level learning is performed by the level learning unit 180 shown in FIG. The level learning is performed on the condition that the train 10 is not present on the track circuit in the non-insulated track circuit and the adjacent track circuit in order to accurately determine the control level 17 in the level learning unit 180. Collect one track level control level candidate value. A plurality of control level candidate values may be collected.

  Transmission signals (train detection signals) are transmitted from the transmission / reception device 11 and the transmission / reception device 12 to the adjacent track circuit 1, the track circuit 2 and the adjacent track circuit 3, respectively. Output signal (train detection signal).

  These received signals are input to the reception level determination unit 120 of the ground control device 100, and when the reception level determination unit 120 determines that all the track circuits are all on board, the train detection signal level of the track circuit 2 (Reception level calculated by the reception level calculation unit 61) is output from the reception level determination unit 120 to the level learning unit 180 via the presence line detection result determination unit 130 and the train presence line determination unit 140.

  The level learning unit 180 collects the reception level 16 of the train detection signal of the track circuit 2 as a control level candidate value of the track circuit 2.

  FIG. 7 is a diagram illustrating a change in the reception level 16 of the track circuit and the reception levels 16-1 and 16-2 of the adjacent track circuit. In a range of a specific level learning period 71, a plurality of levels It is a figure explaining the example which collects a control level candidate value.

  As shown in the figure, in the range of a certain level learning period 71, collection of control level candidate value 1 is started on the precondition that the track circuit and the adjacent track circuit are all uplifted (Δ in FIG. 7). The average value of the reception level 16 of the track circuit after a certain time has elapsed (marked with ▲) is defined as a control level candidate value 1. Thereafter, similarly, the average value of the reception level 16 of the track circuit for a certain time is set to the control level candidate values 2, 3,..., M, and the collection of candidate values is continued until the level learning timing t2 is reached.

  If either the track circuit or the adjacent track circuit falls or the level learning timing t2 is reached while collecting the control level candidate value m, the collection of the control level candidate value m is stopped.

  When only the control level candidate value 1 is acquired in the range of the level learning cycle 71, the control level candidate value 1 is set as, for example, the control level candidate value A. Further, when a plurality of control level candidate values are acquired, the largest one of the plurality of control level candidate values 1, 2,.

  When the level learning timing t2 is reached, if there is a control level candidate value A, the control level candidate value B is determined from the relationship with the control level candidate value B in the previous level learning cycle.

  Next, the control level of the next period is determined from the relationship between the control level candidate value B and the lower learning start level 173 and the upper / lower limit values 172 and 174 of the control level 17.

  The lower learning start level 173 is a level at which tracking by level learning is started when the control level candidate value B is a certain amount smaller than the initial value 171 of the control level (see FIG. 9).

  FIG. 11 is a flowchart for explaining processing for determining the control level candidate value A.

  In the figure, in step S111, it is determined whether a train is present on the track circuit and the adjacent track circuit. If the train is not present (Yes), the process proceeds to step S112. The process proceeds to S113.

In step S112, collection of train detection signal levels (reception levels) is started, and an average value for a certain period of time is set as control level candidate values 1, 2, 3,. In step S113, collection of the train detection signal level (reception level) is stopped, and the average value for a predetermined time is discarded.
In step S114, when the level learning timing comes (Yes), the control level candidate value A is acquired in step S115.

  In step S116, the control level candidate value B is determined from the relationship with the control level candidate value B in the previous cycle.

In step 117, processing for determining the control level of the next cycle from the control level candidate value B is performed.
Detailed processing in steps S116 and S117 will be described later.

  FIG. 8 shows a method of determining the control level candidate value B from the control level candidate value A. The left side of the figure shows the fluctuation range of the control level candidate value A, and the right side shows the fluctuation range of the control level candidate value B corresponding to each range. Further, in this example, the variable range from the control level candidate value A in the previous level learning cycle is set to −2 dB to +2 dB.

When the control level A is in the range I larger than the control level candidate value B + 2 dB of the previous cycle, the control level candidate value B + 2 dB of the previous cycle is set as the control level candidate value B.
If the range II is equal to or greater than the control level candidate value B-2 dB in the previous cycle and equal to or less than the control level candidate value B + 2 dB in the previous cycle, the control level candidate value A is set as the control level candidate value B. In addition, when the range is smaller than the control level candidate value B-2dB of the previous cycle, the control level candidate value B-2dB of the previous cycle is set as the control level candidate value B.

  This prevents erroneous tracking of the control level against transient level fluctuations other than weather fluctuations, thereby achieving both availability and safety.

  FIG. 12 is a flowchart for explaining the process of determining the control level candidate value B from the control level candidate value A in step S116 of FIG.

  In the figure, if it is determined in step S121 that the control level candidate value A> the control level candidate value B + 2 dB (range I) in the previous cycle, the level candidate B + 2 dB in the previous cycle is changed to the control level candidate B in step S123. decide.

  If it is determined in step S121 that the control level candidate value A> the control level candidate value B + 2 dB (range I) in the previous cycle is not satisfied, the control level candidate value A <the control level in the previous cycle is determined in step S122. If the candidate value is B-2 dB (range III), the level candidate B + 2 dB of the previous cycle is determined as the control level candidate B in step S124.

  In step 122, if the control level candidate value A is not less than the control level candidate value B-2dB (range III) of the previous cycle, it is determined that the control level candidate value A is in (range II), and step S125 Then, the control level candidate value A is determined as the control level candidate B.

  FIG. 9 shows a method of determining the control level of the next cycle from the control level candidate value B. The left side of the figure is the fluctuation range of the control level candidate value B, and the right side is the fluctuation range of the control level of the next cycle corresponding to each range.

  In this example, for the lower level learning, when the control level candidate value B is reduced by 2 dB from the initial value 171 of the control level, the lower level of the control level is started. Further, the lower learning start level 173 is an equal fluctuation range and an equal boundary tolerance.

  In the figure, when the control level candidate value B is in a range larger than the control level upper limit value 172 (outside the specified range (1)), the control level upper limit value 172 is set to the control level of the next cycle (control level of (1)). And

  When the range (2) is greater than the initial value 171 of the control level 17 and is equal to or less than the control level upper limit value 172, the control level candidate value B is set as the control level of the next cycle.

  When the value is larger than the lower learning start level 173 and within the initial value 171 of the control level 17 (within a certain range (3)), the initial value 171 of the control level is set as the control level of the next cycle ((3) Control level).

  By this processing, it is allowed to increase the boundary deviation within a range that does not affect the operation rate, and the safety is ensured.

When the control level lower limit value -2 dB is greater than 174 and is in the range (4) below the lower learning start level 173, the control level candidate value B + 2 dB is set as the control level of the next cycle.
Because the boundary shift is no longer acceptable, this process lowers the control level to the minimum necessary level, ensuring safety while ensuring boundary shift within a range that does not affect the operating rate.

  When the control level lower limit value is -2 dB or less in the range of 174 or less (outside the specified range (5)), the control level lower limit value is set as the control level of the next cycle (control level of (5)).

  FIG. 13 is a flowchart for explaining the process of determining the control level of the next cycle from the control level candidate value B in step S117 of FIG.

  In the figure, in step S131, it is determined whether the control level candidate value B> the control level upper limit value (range (1)). If the condition is satisfied (Yes), the control level upper limit value is set in step S132. Determine the control level of the cycle.

  If the condition is not satisfied (No) in step S131, the control level candidate value B> the initial value of the control level and the control level candidate value B ≦ the control level upper limit value (range (2)) in step S133. If the condition is satisfied (Yes), the control level candidate value B is determined as the control level of the next cycle in step S134.

  If the condition is not satisfied (No) in step S133, whether or not the control level candidate value B> the lower learning start level and the control level candidate value B ≦ the initial value of the control level (range (3)) is determined in step S135. If it is determined and the condition is satisfied (Yes), the initial value of the control level is determined to be the control level of the next cycle in step S136.

  If the condition is not satisfied (No) in step S135, in step S137, control level candidate value B> control level lower limit value-2 dB, and control level candidate value B ≦ lower learning start level (range (4)). If the condition is satisfied (Yes), the control level candidate value B + 2 dB is determined as the control level of the next cycle in step S138.

  If the condition is not satisfied (No) in step S137, it is determined that the control level B ≦ the control level lower limit value−2 dB (range (5)), and the control level lower limit value is controlled in the next cycle in step S139. Decide on the level.

  If none of the control level candidate values can be collected and the state continues for a certain time, the control level 17 is changed to the initial value 171 (see FIG. 9) only when the initial value of the control level> the control level.

  When the initial value of the control level ≦ the control level, the control level is not changed. As a result, it is possible to prevent the disappearance of the recognition of the train line by preventing the train track from being drooped due to a rapid dry transition at the time of the train line.

  FIG. 14 is a flowchart for explaining the processing when the train continues on the track circuit and the adjacent track circuit.

  In the figure, in step S141, it is determined whether a train is present on the track circuit and the adjacent track circuit. If the train is present (Yes), the process proceeds to step S142. If the train is not present (No), the process proceeds to step S141. The process proceeds to S143.

  In step S142, it is confirmed whether the train existing line has continued in the track circuit and the adjacent track circuit for a certain period of time. If the train has continued for a certain period of time (Yes), the process has not continued in step S144 for a certain period of time. For (No), the processing is performed in step S145.

  In step S144, the control level and the initial value of the control level are determined. If the initial value of the control level> the control level, the control level is changed (corrected) to the initial value in step S146.

  In step S144, if the initial value of the control level ≦ control level, the control level is not changed in step S147.

  In step S145, the monitoring time is updated to determine whether the train line has continued for a certain time in the track circuit and the adjacent track circuit.

  In step S143, the monitoring time for whether the train existing line continues in the track circuit and the adjacent track circuit for a predetermined time is returned to the initial value.

  The fall determination level 14 (see FIGS. 1 to 3) and the lifting determination level 19 (see FIG. 6) are determined based on the determined control level. For example, as shown in FIG. 6, the fall determination level 14 and the lifting determination level 19 are values (10 dB and 8 dB) obtained by reducing the control level 17 by a certain value, respectively.

  The difference between the control level 17 and the drop determination level 14 is set to be smaller than the drop width of the reception level 16 when each point of the track circuit is short-circuited with the specified short-circuit sensitivity. Further, in order to prevent a reduction in operating rate due to the boundary shift, an unacceptable boundary shift position is set to be smaller than the drop width of the reception level 16 when the short circuit is short-circuited.

  The uplift determination level 19 is set higher than the drop determination level 14 so that the uplift determination is not performed immediately after the drop determination due to the fluctuation of the reception level 16 due to the error of the MSK modulation. For example, the lifting judgment level = falling judgment level + 1.5 dB.

  The lower limit learning start level 173 is determined from the fall determination level 14 and the bad weather reception level 16a within a range in which the size of the boundary deviation does not affect the operation rate.

  The level learning lower limit value / upper limit value is determined from the drop width and drop determination level 14, the uplift determination level 19 and the lower limit learning start level 173 when short-circuiting with the specified short-circuit sensitivity.

  That is, the level learning lower limit value is corrected when the lower limit learning start level 173 is corrected, and when the track circuit undergoes a dry transition within the precondition range after the downward level learning until the next level learning, the train The determination is made so that the track circuit is not judged on the track despite the presence.

  In addition, the upper limit of the level learning is set so that the track circuit does not fall even if the track circuit is leaked within the precondition after the upward level learning and before the next level learning. Determined from the fall determination level 14 and the fall width.

  The control level 17 is determined by the above processing, and the presence / absence of the train 10 is accurately determined by using the fall determination level 14 and the lifting determination level 19, thereby ensuring the safety of the train operation and high. The operating rate can be secured.

In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of the embodiment.
Each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files for realizing each function can be stored in a memory, a recording device such as a hard disk or an SSD (Solid State Drive), or a storage medium such as an IC card, an SD card, or a DVD.
Further, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

1-n Track circuit 1-m Control level candidate value 10 Train 11-1n Transmission / reception device 21 Modulation unit 31 Transmission unit 41 Reception unit 51 Demodulation unit 61 Reception level calculation unit 100 Ground control device 110 On-line management unit 111 Telegram signal creation unit 112 Standing line detection result information storage unit 120 Reception level determination unit 130 Standing line detection result determination unit 140 Train presence line determination unit 150 Signal control unit 160 Display unit 170 Network 180 Level learning unit 190 Determination level determination means

Claims (3)

Transmitting a signal for detecting whether or not the train is present on the non-insulated track circuit, and determining the reception level of the received signal and the transmission / reception device that receives the transmitted signal via the track circuit, In a track circuit device having a control device for determining that the track circuit is dropped when the reception level is equal to or lower than the drop determination level, and for determining whether the track circuit is lifted or not when it is equal to or higher than the lift determination level,
Considering the train track status of the track circuit and the adjacent track circuit adjacent to the track circuit, the reception level of the track circuit is collected as a control level candidate value of the track circuit, and based on the control level candidate value, A level learning unit that determines a control level that is an estimated value of a reception level when the train is not present, and a variable control of the control level following the fluctuation of the reception level, and the fall determination level based on the control level And determination level determining means for determining the above-mentioned lifting determination level,
When the determination level determining means determines the control level, the control level candidate value is lower than the initial value of the control level and lower than the lower learning start level. when in the range between the predetermined value smaller than the control level of the control level lower limit be in, using the control level candidate value corrected to a larger value the control level candidate value, the control for the next cycle A track circuit device characterized by a level.   2. The track circuit device according to claim 1, wherein when determining the control level candidate value, if the difference between the control level candidate value of the previous cycle and the control level candidate value of the next cycle is out of a specified range, the next cycle A track circuit device, wherein the control level candidate value is corrected to a value within a specified range with respect to the control level candidate value of the previous period. The track circuit device according to claim 1, wherein the level learning unit includes:
When the track circuit and the adjacent track circuit are all up in the range of the level learning cycle, collection of control level candidate values of the control level is started, and the average value of the received level of the track circuit for a certain time Is a control level candidate value,
The determination level determination means includes
When none of the control level candidate values can be collected and the state continues for a certain period of time, the control level is changed to the initial value only if the control level is the initial value of the control level> the control level. ,
If the control level is the initial value of the control level ≦ control level, do not change the control level,
Thereby, the track circuit device is characterized by preventing the disappearance of the on-line recognition of the train due to the rapid dry transition at the time of the on-train.

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