JP6189113B2 - Railway signal cable disconnection detector - Google Patents

Description

  The present invention relates to a railroad signal cable disconnection detector that is attached to a railroad crossing safety device and detects a disconnection related to a connection line between a rail and a railroad crossing controller.

  FIG. 8 shows a current level crossing safety device to which a railroad signal cable disconnection detector is attached. (A) is a level crossing 13 and a level crossing controller 20 related to the end line 10 (downline) in the double track section. 30 is a block diagram of a railroad crossing safety device in which track circuits are installed at an alarm start point ADC and an alarm end point BDC. Moreover, FIG. 9 shows the operation state of the track circuit, and (a) to (c) are all the rail pairs 11 and 12, the open circuit type railroad crossing controller 20, and the connection lines 23 a, 23 b, and 24 a related to the alarm end point BDC. , 24b.

  In a track where a railroad crossing safety device is installed (see Non-Patent Documents 1 and 2), for example, in the case of a down line (see FIG. 8 (a)), a railroad crossing road about the track 10 on which the train 14 travels from the start side to the end point side. A closed-circuit type railroad crossing controller 30 is installed at the alarm start point ADC (train detection point) at the front side at 13 starting point side to form a closed circuit type track circuit, and the train passes at the end side of the level crossing road 13 An open circuit type railroad crossing controller 20 is installed at an alarm stop point BDC (train detection point) at the rear position, thereby forming an open circuit type track circuit. In this case, the open-circuit type railroad crossing controller 20 related to the alarm end point BDC is installed near the railroad crossing 13 for early detection of the passing of the train crossing, whereas the closed circuit type railroad crossing related to the alarm starting point ADC. The controller 30 is installed far from the railroad crossing 13 to secure the time after the start of the alarm, but any control section (train detection section) is off the railroad crossing 13.

Specifically (see FIG. 8 (b)), the track 10 on which the track circuit is installed is provided with a pair of rails 11 and 12 that are laid in parallel and on which the train 14 travels. The railroad crossing 13 is installed across the rail pairs 11 and 12.
The open circuit type railroad crossing controller 20 (see Non-Patent Document 2) is for receiving a train detection signal and a transmission unit 21 that constantly transmits a DC train detection signal with a current image shown by an arrow or an AC (not shown). The input / output terminal (+) of the transmission unit 21 and one of the rail pairs 11 and 12, for example, the rail 11, are double-connected by two connection lines 23a and 23b. The input / output terminal (−) of the receiving unit 22 and the other of the rail pairs 11 and 12, for example, the rail 12 are also double-connected by two connection lines 24 a and 24 b.

  All of these four connecting wires 23a to 24b come out of the open circuit type railroad crossing controller 20 and reach the line 10 through appropriate relay terminals and cables, and are welded to the rail pairs 11 and 12 there. However, since it is an open circuit type track circuit, the connection position with the rail pairs 11 and 12 is substantially at the center of the control section. Based on the fact that the train detection signal is received via the axle of the train 14 or the like if the train is present in the control section, whereas the train detection signal is not received when the control section is a non-train presence line. The presence / absence of the train 14 related to the alarm end point BDC is determined.

  The closed-circuit type railroad crossing controller 30 (see Non-Patent Document 2) is for receiving a train detection signal and a transmission unit 31 that constantly transmits a DC train detection signal that is a direct current or an alternating current that is not shown. The input / output terminal (+) of the transmission unit 31 and one of the rail pairs 11 and 12, for example, the rail 11, are double-connected by two connection lines 33a and 33b. The other input / output terminal (−) of the transmission unit 31 and the other of the rail pairs 11 and 12, for example, the rail 12 are double-connected by two connection lines 34 a and 34 b. In addition, the input / output terminal (+) of the receiving unit 32 and one of the rail pairs 11 and 12, for example, the rail 11, are double-connected by two connection lines 35 a and 35 b, and another input / output terminal of the receiving unit 32. (−) And the other of the rail pairs 11 and 12, for example, the rail 12, are double-connected by two connecting lines 36a and 36b.

  All of these eight connecting lines 33a to 36b come out of the closed-circuit type railroad crossing controller 30 and reach the line 10 through appropriate relay terminals and cables, and are welded to the rail pairs 11 and 12 there. However, since it is a closed circuit type track circuit, the connection position with the rail pair 11 and 12 is divided at both ends of the control section. In the illustrated example, the connection lines 33a to 34b on the transmission unit 31 side. Is the end (right end) of the control section, and the connection lines 35a to 36b on the receiving unit 32 side are the start (left end) of the control section. Based on the fact that the train detection signal is received when the train is not in the control section, but the train detection signal is not received when the train is in the control section, the presence or absence of the train 14 related to the alarm start point ADC is determined. The standing line is discriminated.

The train detection state of the open circuit type railroad crossing controller 20 related to the alarm end point BDC will be described in detail (see FIG. 9). When the train 14 does not come in the control section (see FIG. 9A), the rail 11 and the rail 12 is in an insulated state, and the currents of the connection lines 23a to 24b are all zero “0”, and therefore no train detection signal is received, so that the detection result is a train absent line.
On the other hand, when the train 14 enters the control section (see FIG. 9B), the rail 11 and the rail 12 are short-circuited and become conductive with a low resistance suitable for signal transmission. Since the full current I flows and the half current I / 2 flows through each of the connection lines 23a to 24b, the train detection signal is received, so that the detection result becomes the train presence line.

Here, if any one of the connection lines 23a to 24b, for example, the connection line 24a is disconnected (see FIG. 9C), the connection line 24a has zero current “0” not only when the train is not present but also when the train is present. However, since the connection between the rail 12 and the open-circuit type railroad crossing controller 20 is a double connection of the connection line 24a and the connection line 24b, the connection line 24a has zero current “0” when the train is on the line. Even if "" remains, the entire current I flows through the connection line 24b and the train detection signal is received, so there is no inconvenience. Even if the connection lines 24a and 24b are connected to the rail 12 by welding or the like, the connection is rarely damaged due to vibrations when the train passes or the influence of the installation environment, and the connection lines 24a and 24b are disconnected from the rail and disconnected. However, even if such a disconnection occurs, a double connection is made so that the train cannot be detected immediately.
The same applies to the other connection lines 23a, 23b, 33a to 36b.

Overview of Signals for Railway Electrical Engineers Signal Series 1 “Railway Signals General” Japan Railway Electrical Engineering Association, issued on April 8, 2008, revised version 2 p. 116 Fig. 8-3 Introduction to Electricity for Railway Electrical Engineers Signal Series 8 “Level Crossing Security Device” Issued on May 10, 2006, Japan Railway Electrical Engineering Association, 2nd edition, p. 35-42

  A problem relating to disconnection detection based on such a double connection of connection lines will be described with reference to the drawings. FIG. 9D is a block diagram of a portion related to the rail pair 11, 12, the open circuit type railroad crossing controller 20, and the connection lines 23a, 23b, 24a, 24b related to the alarm end point BDC. The disconnection detection condition of the connection lines 23a-24b using is shown. Moreover, FIG. 10 shows the disconnection detection status of the connection lines 23a to 24b using the current detector 27, and (a) to (d) are the rail pair 11 and 12 and the open circuit type railroad crossing related to the alarm end point BDC. 3 is a block diagram of a portion related to a controller 20, connection lines 23a to 24b, and a current detector 27. FIG.

As described above, the rail crossing controller-rail connection is double-connected using two rails per rail, so train detection is possible even if one of the two connection wires falls off the rail and breaks. Since the function is maintained and does not cause malfunction or malfunction of the device, as a means to detect the dropout failure while the dropout failure due to disconnection remains only on one side of the double connection, for example, visual inspection at the site There is only about confirming with.
However, it is a heavy work burden whether it is a visual test or a continuity test using a tester that checks the presence or absence of disconnection while walking across various sites without knowing whether there is a dropout defect.

  Thus, it is conceivable to detect the disconnection automatically by detecting the current of each connection line and constantly monitoring the current state. For example (see FIG. 9D), for the four connection lines 23a to 24b connected to the rail pairs 11 and 12 at the alarm end point BDC, a current such as a current transformer that can be easily retrofitted to each connection line. One detector is mounted at a time, and a current detector 25 is installed for each set of connection line and current detection unit, and whether the current of each connection line is full current I or half current I / 2 is zero. It is conceivable to always check whether it is “0”.

  However, in such a monitoring method, the current detector 25 and the current detection unit are required by the number of connection lines. In addition, since the current of the connecting line is different between when the train is present and when it is not present even in a normal state without disconnection, the open circuit type railroad crossing controller 20 allows the current detector 25 to switch the discrimination threshold in a timely manner. Although it is necessary to capture the presence line information, the wiring and confirmation work is not necessary to stop the operation of the open-circuit type railroad crossing controller 20 or to be screwed. It also takes.

In order to reduce the burden, it seems to be good to collectively detect the round trip currents of the train detection signals in a canceling state so that the detection current is constant regardless of the presence or absence of the train in the normal state. It would be more convenient if the number of current detectors could be reduced.
In order to realize this (see FIG. 10A), a single current detection unit is attached to all four connection lines 23a to 24b in a round-trip current canceling state, and the connection lines 23a to 24b. It can be imagined that the difference current between the reciprocal currents is detected and the disconnection is determined based on the difference current.
In this case, if there is no disconnection in the connection lines 23a to 24b and they are all normal, the difference current at the time of the train presence line becomes zero “0” as in the case of the train non-existence line. There is no need to take in, and the detector 27 including the current detector can be minimized.

However, in the case where the round trip currents are collectively detected in such a manner, it has been found that it is difficult to detect an important disconnection even if an abnormality due to a ground fault or an electric leakage can be detected.
For example, when the connection line 24a is dropped from the rail 12 (see FIG. 10B), the current of the connection line 24a is reduced from the half current I / 2 to zero “0” when the train is present. This is because the current of the connecting line 24b that makes the connection increases from the half current I / 2 to the full current I, so that the change in the difference current is prevented by canceling out the increase and decrease of both.

  Therefore, the current detector 27 is minimized, and as a second best measure (see FIG. 10C), the number of current detectors 27 is increased to two, and the connection lines 23a and 24b are combined in a round-trip current canceling state. A single current detector 27 (on the right side in the figure) is attached to detect a difference current, and another current detection (on the left side in the figure) is performed when the connection lines 23b and 24a are combined in a round-trip current canceling state. When the device 27 was added and the current difference was detected so that the current difference was detected, the current detector 27 was able to detect the disconnection without any problem. And, while performing operation check and threshold adjustment in various disconnection states, when any one connection line is disconnected, the current detector 27 attached to the connection line not only detects the disconnection, It has been found that even a separate current detector 27 that is not attached to the disconnected connection line is in a disconnection detection state.

  For example, when the connection line 24a is disconnected (see FIG. 10C), in the current detector 27 attached to the connection line 24a (on the left side in the figure), the current of the connection line 24a is reduced from the half current I / 2 to 0, Since the difference current is changed from 0 to half current I / 2, disconnection is detected. At the same time, the current detector 27 not attached to the connection line 24a (on the right side in the figure) has a double connection. Since the current of the connection line 24b increases from the half current I / 2 to the full current I and the difference current also changes from 0 to the half current I / 2, the disconnection is detected. Therefore, even if one of the two current detectors 27 and 27 is omitted and only one current detector 27 is provided (see FIG. 10D), not only the disconnection of the connection line 24a but also the connection lines 23a and 23b. 24b can be detected without missing.

The railroad signal cable disconnection detector of the present invention (Solution 1) is based on such knowledge, and double connection lines 23a, 23b; 24a, 24b between the railroad crossing controllers 20, 30 and the rail pairs 11, 12; 33a, 33b; 34a, 34b; 35a, 35b; 36a, 36b were created in order to automatically detect disconnection due to one side dropout,
A railroad signal cable disconnection detector attached to a track circuit in which each rail pair is double-connected to a railroad crossing controller at a train detection point of a railroad track, One connection line is included in the current detection target for the double connection line, but the other connection line is excluded from the current detection target, and one connection line is also the current detection target for the double connection line related to the other rail of the rail pair. A current detector that is attached to the track circuit in a mounted state that includes the other connection line but excludes the other connection line from the current detection target and in a state in which round-trip currents flowing in the plurality of connection lines included in the current detection target cancel each other; When the detection current at the detection unit deviates from the canceling state, the double connection line is disconnected at any of the connection lines including the connection line not subject to current detection to the current detection target connection line of the current detection unit. That a resulting and determines disconnection determination unit characterized.

  Further, the railroad signal cable disconnection detector of the present invention (Solution means 2) is a railroad signal attached to a track circuit in which each rail pair is double-connected to a railroad crossing controller at a train detection point on the railroad track. A cable disconnection detector, wherein one connection line is included in the current detection target for the double connection line related to one rail of the rail pair, while the other connection line is excluded from the current detection target and the rail The double connection line related to the other rail of the pair is also included in the current detection target in a mounted state in which one connection line is included in the current detection target but the other connection line is excluded from the current detection target. A current detection unit attached to the track circuit in a state where the round-trip currents flowing through the plurality of connection lines cancel each other, and the double connection line when the current detected by the current detection unit is out of the cancellation state Characterized in that a and determines disconnection determination unit disconnection in any occurs of the current detected outside of the connecting lines are also added connection line serial current detector of a current detection target of the connection line.

  Furthermore, the railroad signal cable disconnection detector of the present invention (solution 3) is such that any of the rail pairs at the train detection point of the railroad track is double-connected at both ends of the closed circuit type railroad crossing controller. Railway signal cable disconnection detector attached to the track circuit, and one of the double connection lines on one end of the control section among the double connection lines related to one rail of the rail pair. Is included in the current detection target but the other connection line is excluded from the current detection target and the double connection line on the one end side of the control section among the double connection lines related to the other rail of the rail pair. However, when one connection line is included in the current detection target but the other connection line is removed from the current detection target, the round-trip currents flowing through the plurality of connection lines included in the current detection target cancel each other. In fit A current detection unit attached to the track circuit, and a current detection target of the current detection unit with respect to the double connection line on the one end side of the control section when a detection current in the current detection unit is out of a canceling state And a disconnection determination unit that determines that a disconnection has occurred in any of the connection lines including the connection lines that are not current detection targets.

  Further, the railroad signal cable disconnection detector of the present invention (solution 4) is such that each of the rail pairs is double-connected at both ends of the closed circuit type railroad crossing controller at the train detection point of the railroad track. Railway signal cable disconnection detector attached to a track circuit having four pairs of double connection lines, including one connection line as a current detection target for all the pairs of the double connection lines Current that is attached to the track circuit in a mounted state in which the other connection line is removed from the current detection target and in which the round-trip currents flowing through the plurality of connection lines included in the current detection target cancel each other When the detection current at the detection unit and the current detection unit deviates from the canceling state, four connection lines that are not current detection targets are connected to the four connection lines that are current detection targets of the current detection unit for the double connection line Disconnected to any of the eight connecting lines That a resulting and determines disconnection determination unit characterized.

  The railroad signal cable disconnection detector according to the present invention is (the solution means 5), the railroad signal cable disconnection detector of the above solution means 1 to 4, wherein the duplex signal is detected according to the determination of the occurrence of disconnection by the disconnection determination section. Notify the occurrence of disconnection related to the connection line and also notify the connection line that may have been disconnected, but when the notification is made, the connection line of the current detection unit of the current detection unit is not current detection target for the double connection line It is characterized by comprising notifying means for notifying connection lines including connection lines.

  In such a railway signal cable disconnection detector of the present invention (solutions 1 to 4), the current detection unit is mounted in a specific state with respect to the double connection line, so that in the normal state without disconnection, the train While the detected current is maintained in the canceling state regardless of the presence / absence of the train line, if a disconnection occurs in any of the double connection lines, a train detection signal flows through the track circuit according to the train line status. Since the detected current deviates from the canceling state, the occurrence of disconnection is detected. Moreover, not only the disconnection of the connection line that is the current detection target in the double connection line is detected, but also the current change in the double connection of the connection line that is out of the current detection target in the double connection line. Disconnection is detected indirectly via Therefore, according to the present invention, it is possible to automatically and accurately detect one drop-off of the double connection between the railroad crossing controller and the rail without using the train line information.

  Moreover, in the railway signal cable disconnection detector of the present invention (Solution 5), since connection lines that may have been disconnected are reported without excess or deficiency, the burden of confirmation work at the site is reduced. The

1 shows the structure of a railway signal cable disconnection detector according to Example 1 of the present invention, where (a) is a block diagram of a single railway signal cable disconnection detector, and (b) is an attachment of a railway signal cable disconnection detector to a track circuit. It is a block diagram of a crossing safety device. The operation state of the railroad signal cable disconnection detector is shown, and both (a) and (b) are blocks related to the rail, the open circuit type railroad crossing controller, the connection line, and the railroad signal cable disconnection detector. FIG. The operation state of the railroad signal cable disconnection detector is shown, and both (a) and (b) are blocks related to the rail, the open circuit type railroad crossing controller, the connection line, and the railroad signal cable disconnection detector. FIG. The operation state of the railroad signal cable disconnection detector is shown, and both (a) and (b) are blocks related to the rail, the open circuit type railroad crossing controller, the connection line, and the railroad signal cable disconnection detector. FIG. It is a block diagram which shows the structure of a railway signal cable disconnection detector about Example 2 of this invention. Indicates the necessity of the current detection connection line distribution condition, and (a) to (c) all of the part related to the rail related to the alarm starting point, the connection line of the closed-circuit type railroad crossing controller, and the railroad signal cable disconnection detector It is a block diagram. About Example 3 of this invention, an example of suitable electric current detection connection line distribution and the operation state which concerns on a disconnection detection are shown, and (a)-(c) all are the rail which concerns on an alarm starting point, and a closed circuit type crossing controller It is a block diagram of the part which concerns on this connection line and a railway signal cable disconnection detector. 1 shows a conventional level crossing safety device, where (a) is a layout diagram of a level crossing controller related to the down line in a double track section, and (b) is a block diagram of a level crossing safety device in which track circuits are installed at an alarm start point and an alarm end point. It is. The operation state of a track circuit is shown, (a)-(d) are all block diagrams of the part which concerns on the rail which concerns on an alarm stop point, an open circuit type railroad crossing controller, and a connection line. The disconnection detection situation of the connection line using the current detector is shown, and (a) to (d) are all blocks related to the rail, the open circuit type railroad crossing controller, the connection line, and the current detector related to the alarm end point. FIG.

About the railway signal cable disconnection detector of such this invention, the specific form for implementing this is demonstrated by the following Examples 1-3.
The embodiment 1 shown in FIGS. 1 to 4 embodies the above-described solving means 1 to 3 and 5 (claims 1 to 3 and 5 as originally filed), and the embodiment shown in FIGS. Reference numeral 2 denotes a modification thereof, and the third embodiment shown in FIG. 7 embodies the above-described solving means 4 and 5 (claims 4 and 5 as originally filed).
In addition, since the same reference numerals are given to the same constituent elements as those in the past in the illustration thereof, and what is described in the background art section is also common to the following embodiments, it is redundant. The description of this will be omitted, and the following description will focus on differences from the prior art.

  About the Example 1 of the railway signal cable disconnection detector of this invention, the specific structure is demonstrated referring drawings. FIG. 1A is a block diagram relating to a single rail signal cable disconnection detector 40 and four connection lines to be detected, and FIG. 1B is a diagram illustrating three rail signals for two types of track circuits. It is a block diagram concerning a railroad crossing security device provided with a cable disconnection detector.

The railroad crossing safety device of FIG. 1 is different from the railroad crossing safety device of FIG. 8 described above in that three railway signal cable disconnection detectors 40 are introduced and distributedly attached to the connection lines 23a-24b and 33a-36b. It is a point.
The railway signal cable disconnection detector 40 (see FIG. 1 (a)) has a current detector 41 composed of a current transformer or the like that can be easily retrofitted to each connection line, and a detected value of the difference current ΔI by the current detector 41. A disconnection determination unit 42 that inputs and determines whether or not there is a disconnection, and a display unit and a monitoring unit (not shown) as notification means that can report the determination result of the disconnection determination unit 42 are provided.

  The disconnection determination unit 42 includes a comparison circuit 43 that compares the difference current ΔI and the threshold Th, a timing circuit 44 that measures the duration of the difference current ΔI exceeding the threshold Th using a counter, and a normal state corresponding value. Is held, but if the count duration of the time counting circuit 44 exceeds the excessive reaction suppression time such as 1 second, for example, a latch 45 that holds the value corresponding to the disconnection occurrence state, and means for informing the display unit and the monitoring unit of the held value However, the circuit configuration is not limited to this circuit configuration. When the difference current ΔI continuously exceeds the threshold value Th, the determination content may be changed from no disconnection to disconnection. It ’s fine.

  The current detection unit 41 is attached to the track circuit to be detected for disconnection. At that time, one connection line is included in the current detection target for the double connection line related to one rail of the rail pair of the track circuit. The connection state is removed from the current detection target and the double connection line related to the other rail of the rail pair includes one connection line as the current detection target but the other connection line from the current detection target. It is mounted in a state that satisfies the three conditions of the removed mounting state and the mounting state in which the round-trip currents flowing through the plurality of connection lines included in the current detection target cancel each other, and the mounting state is maintained even after mounting. is there.

  In this mounted state, if there is no disconnection when the train detection signal is energized, a pair of connection lines in which the half current I / 2 flows in the reverse direction or in the opposite phase is included in the current detection target of the current detection unit 41. In addition, any of the connection lines that are double-connected to those connection lines flows a half current I / 2 if there is no disconnection when the train detection signal is energized. Has been removed from. For this reason, the difference current ΔI detected by the current detection unit 41 continues to be zero “0” in the canceling state regardless of whether the train detection signal is energized or not when there is no disconnection, but there is one connection line for current detection. In the disconnected state, the current to be detected decreases by half current I / 2, and in the state in which one connection line that is not the current detection target is disconnected, the current to be detected increases by half current I / 2, and when the train detection signal is energized Therefore, the threshold Th is set to an intermediate value suitable for separation between zero and the half current I / 2, for example, I / 4.

  Furthermore, since the relationship between the difference current ΔI based on the mounting state of the current detection unit 41 and the disconnection of the connection line is premised, the disconnection determination unit 42 having the above-described configuration allows the current detected by the current detection unit 41 to be detected. When it is out of the canceling state, it is determined that a disconnection has occurred in any of the connection lines including the connection line not subject to current detection to the current detection target connection line of the current detection unit 41 for the double connection line subject to disconnection detection It has become.

  In addition, when the disconnection determination unit 42 determines that a disconnection has occurred, the display unit or the monitoring unit receives a disconnection display lamp (not shown) attached to the disconnection determination unit 42 or a disconnection report transmitted from the disconnection determination unit 42. The occurrence of disconnection related to the double connection line subject to disconnection detection is notified by displaying the occurrence of disconnection on a status display screen of a centralized monitoring device (not shown) or the like. Furthermore, at that time, as a connection line that may have been disconnected, that is, as a connection line that should be individually inspected by visual inspection or a tester on the site, current detection is performed for the double connection line that is subject to disconnection detection. Notifying the connection line that includes not only the current detection target connection line of the unit 41 but also the connection line that is not the current detection target of the current detection unit 41 by, for example, simultaneously lighting a plurality of lamps or displaying a name list of connection lines. It is intended to be targeted.

  When the specific attachment state is described for each of the three railway signal cable disconnection detectors 40 (see FIG. 1B), the railway signal cable disconnection detector 40 attached to the track circuit related to the alarm end point BDC is ( On the right side in the figure), only one of the connection lines 23a and 23b that connect the open circuit type railroad crossing controller 20 and the rail 11 by double connection, for example, only the connection line 23b is included in the current detection target of the current detection unit 41. Only one of the connection lines 24a and 24b connecting the open circuit type railroad crossing controller 20 and the rail 12 by double connection, for example, only the connection line 24a is included in the current detection target of the current detection unit 41.

  The railroad signal cable disconnection detector 40 attached to the end of the control section of the track circuit related to the alarm starting point ADC (center in the figure) is connected to the transmitter 31 and the rail 11 of the closed-circuit type railroad crossing controller 30. Only one of the connection lines 33a and 33b connected by multiple connections, for example, only the connection line 33b is included in the current detection target of the current detection unit 41, and the transmission unit 31 and the rail 12 of the closed-circuit type railroad crossing controller 30 are connected to each other. Only one of the connection lines 34 a and 34 b connected by the multiple connection, for example, only the connection line 34 a is included in the current detection target of the current detection unit 41.

  The railroad signal cable disconnection detector 40 (left side in the figure) attached to the beginning of the control section of the track circuit related to the alarm starting point ADC is a double connection between the receiving section 32 of the closed-circuit type railroad crossing controller 30 and the rail 11. Only one of the connection lines 35a and 35b connected by the, for example, only the connection line 35b is included in the current detection target of the current detection unit 41, and the reception unit 32 of the closed-circuit type railroad crossing controller 30 and the rail 12 are double-connected. For example, only one of the connection lines 36a and 36b that are connected with each other, for example, only the connection line 36a is included in the current detection target of the current detection unit 41.

  About the railway signal cable disconnection detector 40 of this Example 1, the use aspect and operation | movement are demonstrated referring drawings. 2 to 4, both (a) and (b) are identical to the rail pair 11, 12, the open circuit type railroad crossing controller 20, and the connection lines 23 a, 23 b, 24 a, 24 b related to the alarm end point BDC. It is a block diagram of the part which concerns on the railroad signal cable disconnection detector 40 of a stand.

Since the current detection unit 41 is attached to the connection lines 23a to 24b related to the alarm end point BDC as described above, the two connection lines 23b and 24a out of the four are detected by the railway signal cable disconnection detector 40. Is detected, and it is further determined whether or not any of the four connection lines 23a to 24b is broken. When the occurrence of the breakage is determined, the occurrence of the breakage of the four connection lines 23a to 24b is detected. A notification is issued.
More specifically (see FIG. 2 (a)), in the normal state where there is no disconnection in any of the four connection lines 23a to 24b, when the train is not present, the rail pair 11, 12 is in an insulated state. Since the train detection signal does not flow, the currents of the connection lines 23a to 24b all become zero “0”, and the difference current ΔI between the connection lines 23b and 24a also becomes zero “0”, so it is determined that there is no disconnection. .

  In addition, when the train 14 arrives in a normal state with no disconnection in any of the four connection lines 23a to 24b (see FIG. 2 (b)), and the train is in a train existing state, the rail pairs 11 and 12 are short-circuited. The train detection signal flows, but in this case, the total current I is bisected at the double connection lines 23a and 23b and the double connection lines 24a and 24b. Since the current 24b becomes half current I / 2 and the reciprocal currents of the connection lines 23b and 24a are collectively detected in the canceling state, the difference current ΔI is also zero “0”. It is determined. In this way, in the normal state without disconnection, the difference current ΔI is also zero “0” when the train is present and absent, so the railway signal cable disconnection detector 40 is connected to the open circuit type railroad crossing controller 20 from the present line. Judgment can be made accurately without taking in information.

  Furthermore (see FIG. 3A), if any of the four connection lines 23a to 24b, for example, the connection line 24a drops off from the rail 12 and is disconnected, the rail pair 11, 12 In this case, the train detection signal still flows, but in this case, a half-current I / 2 flows in each of the double-connected connection lines 23a and 23b having no disconnection, whereas the double connection in which the disconnection has occurred. For the connection lines 24a and 24b, the current of the disconnected connection line 24a becomes zero “0”, and the current of the opposite connection line 24b becomes the total current I, so that the round-trip currents of the connection lines 23b and 24a cancel each other. In this case, it is determined that there is a disconnection, because the difference current ΔI collectively detected in (1) becomes half current I / 2 instead of zero “0”.

  In addition, when any of the remaining three connection lines, for example, 24b is dropped from the rail 12 and is in a disconnected state (see FIG. 3B), the rail pairs 11 and 12 are short-circuited when the train is on the line. In this case, the train detection signal flows. In this case, half current I / 2 flows through the double connection lines 23a and 23b without disconnection, whereas the double connection line 24a with disconnection occurs. , 24b, the current of the disconnected connection line 24b becomes zero “0”, and the current of the opposite connection line 24a becomes the total current I. Therefore, the round trip currents of the connection lines 23b, 24a are collectively detected in an offset state. Since the difference current ΔI thus made becomes the half current I / 2, it is determined that there is a disconnection in this case as well.

  Moreover, when any one of the remaining two connection lines, for example, the connection line 23b is disconnected from the rail 11 and is in a disconnected state (see FIG. 4A), the rail pairs 11 and 12 are short-circuited when the train is present. In this case, the train detection signal flows. In this case, the half-current I / 2 flows in the double-connection connection lines 24a and 24b without disconnection, whereas the connection of the double connection in which the disconnection has occurred. For the wires 23a and 23b, the current of the disconnected connection wire 23b becomes zero “0”, and the current of the opposite connection wire 23a becomes the total current I. Therefore, the round trip currents of the connection wires 23b and 24a are collected in a canceling state. The difference current ΔI detected in this way is also the half current I / 2.

  Also, (see FIG. 4 (b)), when the remaining connection line 23a is disconnected from the rail 11 and is disconnected, the rail pair 11, 12 is short-circuited when the train is on, Although the train detection signal flows, in this case, the half-current I / 2 flows in the double-connected connection lines 24a and 24b without disconnection, whereas the double-connected connection lines 23a and 23b in which the disconnection has occurred The current of the disconnected connection line 23a becomes zero “0”, and the current of the opposite connection line 23b becomes the total current I. Therefore, the reciprocal currents of the connection lines 23b and 24a are collectively detected in an offset state. Since the current ΔI is also the half current I / 2, it is determined that there is a disconnection in this case as well.

  As described above, when any one of the four connection lines 23a to 24b is in a disconnected state, the current detection unit of course includes a case where the connection lines 23b and 24a included in the current detection target of the current detection unit 41 are disconnected. Even when the connection lines 23a and 24b that are not included in the current detection target 41 but include a double connection partner are disconnected, the disconnection state is accurately detected, and the connection lines 23a to 24b are disconnected. The occurrence is reported to security personnel by the railway signal cable disconnection detector 40 at the site, the station equipment at the station, the centralized monitoring device at the center, etc. Before the train detection function by the open-circuit type railroad crossing controller 20 is impaired. An accurate disconnection check can be performed.

  Although repeated detailed explanation is omitted, there is a difference that the train detection signal flows when the train is not present, but the railway signal cable disconnection detection attached to the end of the control section of the track circuit related to the alarm starting point ADC is detected. Similarly, the device 40 detects and notifies the disconnection generated in the four connection lines 33a to 34b. Similarly, the railroad signal cable disconnection detector 40 attached to the beginning of the control section of the track circuit related to the alarm starting point ADC similarly detects and notifies the disconnection generated in the four connection lines 35a to 36b. In any case, disconnection is detected and notified not only for the current detection target connection line but also for the current detection target connection line.

A specific configuration of the railway signal cable disconnection detector according to the second embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a block diagram of the railroad signal cable disconnection detector 50.
The railroad signal cable disconnection detector 50 is different from the railroad signal cable disconnection detector 40 of the first embodiment described above in that the number of current detection units 41 is increased to two and corresponding disconnection determination. The part 42 is a disconnection determination part 51.

  The disconnection determination unit 51 is input with the difference current ΔI detected by one current detection unit 41 to detect a disconnection, and is detected by a pair of comparison circuit 43, a timing circuit 44, a latch 45, and the other current detection unit 41. The comparison circuit 43, the timing circuit 44, the latch 45, and the latch values of the two sets of latches 45 and 45, which perform the disconnection determination by inputting the difference current ΔI obtained, are logically summed and displayed on the display unit or the monitoring unit. And an OR circuit 52 for sending out the data.

  Such a railroad signal cable disconnection detector 50 can detect current at two locations by the two current detection units 41 and 41, and if the disconnection occurs at any one of them, the fact is notified. Therefore, for example, both the start and end of the control section of the track circuit related to the alarm start point ADC and the closed-circuit type railroad crossing controller 30 are connected. This is suitable for the eight connection lines 33a to 36b.

[Current detection connection line distribution conditions]
Here, when the current detection unit 41 of the railway signal cable disconnection detector 50 (or 40) is attached to the connection lines 33a, 33b, 34a, 34b, 35a, 35b, 36a, 36b of the closed circuit type railroad crossing controller 30, The fact that the detection connection line distribution condition is necessary will be described.

  In the above-described embodiment, when the current detection unit 41 is attached to the connection lines 33a to 36b, one end of the control section of the alarm starting point ADC among the double connection lines related to one rail 11 of the rail pairs 11 and 12 is provided. Regarding the double connection lines 33a and 33b on the (termination) side, one connection line 33b is included in the current detection target, but the other connection line 33a is excluded from the current detection target and the other rail of the rail pair 11 and 12 is used. Among the double connection lines according to No. 12, one connection line 34a is included in the current detection object for the double connection lines 34a and 34b on the one end (termination) side of the alarm starting point ADC, but the other connection line 34b is included. In the mounted state removed from the current detection target and the round trip currents I / 2 and I / 2 flowing in the plurality of connection lines 33b and 34a included in the current detection target of the current detection unit 41 cancel each other, Wear has been carried out. The same applies to the double connection lines 35a and 35b and the double connection lines 36a and 36b on the start end side of the control section of the alarm starting point ADC.

  On the other hand, the closed circuit type railroad crossing controller 30 is connected like the double connection lines 23a and 23b and the double connection lines 24a and 24b related to the alarm stop point BDC to which the open circuit type railroad crossing controller 20 is connected. If the current detection connection line distribution condition is not imposed on the alarm start point ADC, that is, when selecting the connection line of the current detection target, the alarm start point ADC is distributed to the start end and the end of the control section of the alarm start point ADC for each end. If the selection is not performed, inconveniences such as those described below with reference to the drawings may occur. 6 (a) to 6 (c) are parts relating to the rail pair 11, 12 relating to the alarm starting point ADC, the connection lines 33a to 36b of the closed-circuit type railroad crossing controller 30, and the railway signal cable disconnection detector 50. FIG.

  For example (see FIG. 6A), for the double connection lines 33a and 33b associated with one rail 11 of the rail pair 11 and 12, one connection line 33a is included in the current detection target of the current detection unit 41, but the other connection In a mounted state in which the line 33b is removed from the current detection target and the double connection lines 36a and 36b related to the other rail 12 are also included in the current detection target but the other connection line 36a is removed from the current detection target. When the current detector 41 is attached to the track circuit related to the alarm starting point ADC in a state where the round trip currents I / 2 and I / 2 flowing through the plurality of connection lines 33a and 36b included in the current detection object cancel each other, The same mounting conditions as in the case of the end point BDC are satisfied, but the current detection connection line distribution conditions described above are not satisfied.

  In this case, if there is no disconnection and the train is not present, the train detection signals are distributed equally in each connection line and the difference current ΔI becomes zero “0” (see FIG. 6A). In such a state where the connection line 36a is disconnected, for example, the train detection signal is biased toward the double connection line 36b when the train is not present, and the difference current ΔI becomes the half current I / 2 (FIG. 6). (Refer to (b)) Although it seems to be good at first glance, the difference current ΔI becomes half current I / 2 until the train 14 enters the control section of the alarm starting point ADC (FIG. 6C). )), Which is inconvenient. Therefore, when the current detection unit 41 is attached to the connection lines 33a to 36b related to the alarm starting point ADC, it is necessary to satisfy the above-described current detection connection line distribution condition.

A specific configuration and operation of the railway signal cable disconnection detector 3 according to the present invention will be described with reference to the drawings.
7 (a) to (c) are parts related to the rail pair 11, 12 relating to the alarm starting point ADC, the connection lines 33a to 36b of the closed-circuit type railroad crossing controller 30, and the railroad signal cable disconnection detector 40. Among these, (a) is an example of appropriate current detection connection line allocation, and (b) and (c) show an operation state related to disconnection detection.

  Here, the single current detection unit 41 is formed while satisfying the above-described current detection connection line distribution conditions for the connection lines 33a to 36b between the line 10 and the closed circuit type railroad crossing controller 30 related to the alarm starting point ADC. An example will be described in which any of the eight disconnections of the connection lines 33a to 36b can be detected by mounting. Specifically (see FIG. 7A), the double connection lines 33a and 33b related to one rail 11 of the rail pair 11 and 12 with respect to the terminal side as one end side of the control section of the alarm starting point ADC. One connection line 33a is included in the current detection target, but the other connection line 33b is excluded from the current detection target and the double connection lines 34a and 34b related to the other rail 12 of the rail pair 11 and 12 are also connected to one connection line. 34a is included in the current detection target, but the other connection line 34b is removed from the current detection target and the round-trip current I / flows through the plurality of connection lines 33a and 34a included in the current detection target of the current detection unit 41. 2 and I / 2 cancel each other, the current detection unit 41 is attached to the connection lines 33a to 34b.

  Moreover, the current detection of one connection line 35b of the double connection lines 35a and 35b associated with one rail 11 of the rail pair 11 and 12 is also performed on the start end side as the other end side of the control section of the alarm starting point ADC. Although included in the target, the other connection line 35a is excluded from the current detection target, and the double connection lines 36a and 36b related to the other rail 12 of the rail pair 11 and 12 are also included in the current detection target. The round trip currents I / 2 and I / 2 flowing through the plurality of connection lines 35b and 36a included in the current detection target of the current detection unit 41 cancel each other in the mounted state in which the connection line 36b is removed from the current detection target. In this state, the current detection unit 41 is also attached to the connection lines 35a to 36b. In any pair of double connection lines, only one connection line is the current detection target of the current detection unit 41, and the other connection line is not the current detection target.

In this case, if there is no disconnection and the train is in a normal state, the train detection signals are distributed equally in each connection line when the train is not present, and the difference current ΔI becomes zero “0” (see FIG. 7A).
If the train is in a normal state without disconnection, the train detection signals flow evenly distributed to the connection lines on the terminal side when the train is present, so that the difference current ΔI becomes zero “0” (see FIG. 7B).
On the other hand, in a state in which any connection line, for example, the current detection target connection line 36a is disconnected, the train detection signal is biased toward the double connection partner line 36b when the train is not present, and does not flow to the connection line 36a. Therefore, since the difference current ΔI becomes the half current I / 2 (see FIG. 7C), it can be seen that a disconnection has occurred in any of the connection lines.

Although illustration is omitted, in the state where the connection line that is not a current detection target, for example, the connection line 36b is disconnected, the train detection signal is biased toward the double connection line 36a when the train is not present, and the difference current ΔI is half current. Since it is I / 2, it can be seen that a disconnection has occurred in any of the connection lines.
Similarly, when the other connection lines are disconnected, the difference current ΔI becomes a half current I / 2 on the non-train line, so that even if there is only one current detector 41, any connection line disconnection can be accurately detected. .
In this case, all of the connection lines 33a to 36b are included in the objects that are notified as connection lines that may have been disconnected.

The railroad signal cable disconnection detector of the present invention is not limited to the detection of disconnection of the crossing controller attached to the down line of the double line section described above, but is attached to the up line of the double line section or the line of the single line section. The present invention can also be applied to detection of disconnection of a railroad crossing controller. As described above, the alarm start point ADC and the alarm end point BDC are typical examples of the train detection point in the down line of the double line section, but the alarm start point CDC and the alarm end point DDC are the train detection point in the up line of the double line section. This is a typical example, and alarm start points ADC, CDC and alarm end point BDC (or DDC) are typical examples of train detection points in a single line section (see Non-Patent Document 1).
The railroad signal cable disconnection detector of the present invention can be applied not only to a DC track circuit but also to a track circuit using an AC train detection signal. In the case of alternating current, a typical example of the state where the round trip currents cancel each other is a state where the phases of the round trip currents are reversed.

10 ... track (track, rail pair) 11,12 ... rail,
13 ... Railroad crossing, 14 ... Train, ADC ... Alarm start point, BDC ... Alarm end point,
20 ... Open-circuit type railroad crossing controller, 21 ... Transmitter, 22 ... Receiver,
23a, 23b, 24a, 24b ... connecting wires (lead wires), 25, 27 ... current detectors,
30 ... Closed-circuit type railroad crossing controller, 31 ... Transmitter, 32 ... Receiver,
33a, 33b, 34a, 34b ... connecting wire (lead wire),
35a, 35b, 36a, 36b ... connection line (lead wire),
40 ... Railway signal cable disconnection detector, 41 ... Current detector (current transformer),
42 ... disconnection determination unit, 43 ... comparison circuit, 44 ... timing circuit, 45 ... latch,
50 ... Railway signal cable disconnection detector, 51 ... Disconnection determination unit, 52 ... OR circuit

Claims (5)

  A railroad signal cable disconnection detector attached to a track circuit in which each rail pair is double-connected to a railroad crossing controller at a train detection point of a railroad track, One connection line is included in the current detection target for the double connection line, but the other connection line is excluded from the current detection target, and one connection line is also the current detection target for the double connection line related to the other rail of the rail pair. A current detector that is attached to the track circuit in a mounted state that includes the other connection line but excludes the other connection line from the current detection target and in a state in which round-trip currents flowing in the plurality of connection lines included in the current detection target cancel each other; When the detection current at the detection unit deviates from the canceling state, the double connection line is disconnected at any of the connection lines including the connection line not subject to current detection to the current detection target connection line of the current detection unit. Railway signal cable break detectors, characterized in that resulting that a determining disconnection determination unit.   A railroad signal cable disconnection detector attached to a track circuit in which each rail pair is double-connected to a railroad crossing controller at a train detection point of a railroad track, One connection line is included in the current detection target for the double connection line, but the other connection line is excluded from the current detection target and one connection line is also included in the double connection line related to the other rail of the rail pair. The track circuit in a mounted state that is included in the current detection target but the other connection line is removed from the current detection target and in which the round-trip currents flowing through the plurality of connection lines included in the current detection target cancel each other A current detection unit attached to the current detection unit, and when the current detected by the current detection unit is out of the canceling state, the double connection line is connected to a current detection target connection line of the current detection unit and the current detection target connection Railway signal cable break detectors, wherein a disconnection and a and determines disconnection determination unit occurs in any of the well was added connection lines.   A rail signal cable disconnection detector attached to a track circuit in which both of the rail pairs at the train detection point of the railroad track are double-connected at both ends of the closed circuit type railroad crossing controller and the control section, Among the double connection lines related to one rail of the rail pair, one connection line is included in the current detection target for the double connection line on one end side of the control section, but the other connection line is included in the current detection target. Among the double connection lines related to the other rail of the rail pair, the double connection line on the one end side of the control section also includes one connection line as a current detection target, but the other connection line A current detection unit attached to the track circuit in a mounted state in which a current is removed from a current detection target and a round-trip current flowing through a plurality of connection lines included in the current detection target cancels each other, and the current At the detector Any of the connection lines in which, when the output current deviates from the canceling state, the connection line that is not subject to current detection is added to the current detection target connection line of the current detection unit for the double connection line on the one end side of the control section. A railway signal cable disconnection detector, comprising: a disconnection determination unit that determines that a disconnection has occurred.   At the train detection point on the railroad track, each rail pair is double-connected at both ends of the closed-circuit type railroad crossing controller and the control section, and is attached to a track circuit having four sets of double connection lines. Railway signal cable disconnection detector, wherein one connection line is included in the current detection target for all pairs of the double connection lines, but the other connection line is excluded from the current detection target and The current detection unit attached to the track circuit in a state where the round-trip currents flowing through the plurality of connection lines included in the current detection object cancel each other, and the current detected by the current detection unit is out of the cancellation state When the double connection line is determined to be broken in any of the eight connection lines including the four connection lines that are the current detection target of the current detection unit and the four connection lines that are not the current detection target. A railway comprising a disconnection determination unit No. cable break detector.   According to the determination of the occurrence of disconnection by the disconnection determination unit, the occurrence of disconnection related to the double connection line is notified and the connection line that may have been disconnected is also notified. 5. The apparatus according to claim 1, further comprising a notification unit configured to notify a connection line obtained by adding a connection line that is not a current detection target to a connection line that is a current detection target of the detection unit. The described railway signal cable break detector.

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