TW201938413A - Railway-track circuit state determination apparatus - Google Patents

Abstract

A railway-track circuit state determination apparatus (100) is provided with: a measurement terminal (200) that is installed at a section border between railway-track circuits; and a processing device (300). The processing device (300) calculates a current vector of a transmission current with respect to a transmission voltage for each railway-track circuit, and divides the calculated current vector into a train on-rail period and a train off-rail period. The state of the railway-track circuit at least including a normal state and an abnormal state is determined by comparing a current vector trace of each period with a reference vector trace based on a current vector trace in the past for the railway-track circuit.

Description

Track circuit state determination device

The present invention relates to a track circuit state determining device for determining the state of an AC track circuit.

The track circuit in railway traffic is a device that uses the rail as a part of the electrical circuit to detect the presence of a train on the track. It sends signals from one end of the rail and uses a rail relay provided on the other end of the rail. The presence or absence of the reception signal caused by the short-circuit between the rails of the train's axle. The track circuit is installed outdoors, and the track relay may drop abnormally due to the natural environment such as rain or snow. For this reason, various techniques for detecting an abnormal state of an AC rail circuit are widely known (for example, see Patent Documents 1 and 2).
[Prior technical literature]
[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 4-13941
[Patent Document 2] Japanese Patent Laid-Open No. 11-278269

[Questions to be Solved by the Invention]

The conventional state monitoring of the orbital circuit is to compare the transition of the signal (for example, voltage value, current value, phase difference, etc.) of the transmitting side or the receiving side with a specific threshold value, thereby determining the Normal or abnormal status. However, for each track loop, the parameters including the loop length (length of the rail), the distance between the transceiver and the rail (cable length), and the components of the loop of the rail and the subgrade are different. It is necessary for the person in charge of maintenance (user) to set an appropriate threshold value for each machine based on their own experience or insight. Here, a brand-new technology for mechanically realizing the state determination of a track circuit without relying on the insights of a maintenance person (user) or the like is pursued.

The problem to be solved by the present invention is to provide a new technique for determining the state of an AC track circuit.

[Means for solving problems]

A first invention for solving the above-mentioned problems is a track circuit state determination device for determining a state of an AC track circuit, and is characterized in that:
A memory unit that stores a reference vector locus of a current vector relative to a voltage sent to the AC rail circuit;
A calculation unit for calculating a current vector of the transmission current with respect to the transmission voltage based on a measurement value measured by a transmission-side measuring device for the transmission voltage and transmission current of the transmitter of the AC rail circuit; and a determination unit, It calculates a vector trajectory from a trajectory of a specific period of the current vector calculated by the calculation unit, and compares this vector trajectory with the reference vector trajectory, thereby determining the state of the AC orbit circuit.

According to the first invention, the state of the AC track circuit including at least a normal state or an abnormal state can be determined by a novel method of comparing a current vector locus against a transmission voltage with a reference vector locus.

The second invention is the track circuit state determining device according to the first invention, wherein:
The memory unit is a memory: the reference vector trajectory when the AC rail loop train is on the track, that is, the reference vector trajectory when the track is on the track;
The determination unit calculates a vector trajectory from the current vector calculated by the calculation unit when the AC rail loop train is on track, and compares the vector trajectory with the reference vector trajectory while the track is on track.

According to the second invention, the state of the track circuit can be determined by using the current vector trajectory when the train is on the track as an object.

The third invention is the track circuit state determining device according to the first or second invention, wherein:
The aforementioned memory unit is memorized: the aforementioned reference vector trajectory when the aforementioned AC track loop train is not on track, that is, the reference vector trajectory when not on track;
The determination unit calculates a vector trajectory from a current vector calculated by the calculation unit when the AC rail loop train is not on track, and compares the vector trajectory with the reference vector trajectory when the train is not on track.

According to the third invention, the state of the track circuit can be determined by using the current vector trajectory when the train is not on track as an object.

The fourth invention is the track circuit state determining device according to the second or third invention, wherein:
It further includes a division unit that distinguishes the current vector from when the current vector calculated by the calculation unit satisfies a specific steep change condition from when the current vector is satisfied to when the steep change condition is satisfied. So far as the current vector when the train is on track, and the other as the current vector when the train is not on track.

When the train is not on the train, the current vector hardly changes. However, when the train passes, the current vector changes abruptly and returns to the vicinity of the original current vector. For this reason, as in the fourth invention, it is possible to distinguish between when the train is on the track and when it is not on the track every time a train to the track circuit passes from the change of the current vector.

The fifth invention is the track circuit state determining device according to any one of the first to fourth inventions, wherein:
The aforementioned memory unit associates the reference vector trajectory with accompanying information indicating at least one of a season, a time zone, and a meteorological condition in which the AC orbit circuit operates, and plurally memorizes it;
The determination unit selects and compares the above-mentioned situation when the measurement is performed with the reference vector locus satisfying a specific approximation condition as a comparison target.

Because the track circuit is installed outdoors, the transmission current changes due to rain or temperature external environment. As a result, the current vector trajectory changes. For this reason, as in the fifth invention, a reference vector trajectory that approximates the conditions during the measurement of the transmission voltage and the transmission current in seasonal or time zones, meteorological conditions, and the like is selected for comparison, thereby making it possible to make a highly accurate orbit circuit. Status determination.

The sixth invention is the track circuit state determining device according to any one of the first to fifth inventions, wherein:
The aforementioned reference vector trajectory is based on the vector trajectory of the past current vector calculated by the calculation unit, and is used as data for finding the accuracy distribution corresponding to each trajectory position;
The determining unit calculates an evaluation value related to the vector trajectory of the determination target based on the discovery accuracy on the discovery accuracy distribution traced by the vector trajectory of the determination target, and determines the AC orbit circuit based on the evaluation value. status.

According to the sixth invention, the reference vector trajectory is a distribution of the accuracy of discovery based on the position of each trajectory of the past current vector trajectory. As an evaluation value related to the current vector trajectory of the determination target, the current vector trajectory can be obtained The degree of consistency is used as the accuracy of discovery.

Hereinafter, embodiments suitable for the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, and the form to which the present invention can be applied is not limited to the following embodiments. In addition, in the description of the drawings, the same elements are assigned the same element symbols.

[System Components]
FIG. 1 is an application example of the track circuit state determination device 100 according to this embodiment. As shown in FIG. 1, track circuits 1T, 2T, 3T,... The track circuit is a device that performs on-track detection by using the left and right rails R to be electrically short-circuited by the axles of the train. In this embodiment, in the section boundary of the track circuit, the left and right rails R are provided with a double track rail circuit of track insulation 1. The track circuit boundary includes the track insulation 1 provided with two sets of impedance bridges.接 器 3。 Connector 3.

Between the rails R on one end side (transmitting side) of the track circuit, the transmitter is connected to the transmitter, that is, the transmission transformer 7 via the impedance bridge 3 and the current reducing resistor 5, and the rails on the other end (receiving side) In between, the track relay 11 is connected via the impedance bridge 3 and the phase adjuster 9. The current reducing resistor 5 is provided to limit the current and prevent the device from being burnt.

The transmission transformer 7 transforms the AC power supplied from a power source 21 such as a commercial power source to generate a track signal (train detection signal) and sends it to the rails R on the transmission side of the track circuit. That is, the track circuit of this embodiment is an AC track circuit.

The track relay 11 is a two-element track relay having two coils of a track coil and a local coil, and the contact point is driven by the voltage applied to each coil and its phase difference. The orbital coil is connected between the rails R on the receiving side of the orbital circuit and is applied with a voltage of the orbital signal flowing in the orbital circuit. An AC voltage supplied from the power source 21 is applied to the local coil. The voltage (hereinafter referred to as "local voltage") applied to the local coil is stable in phase (also referred to as period), and therefore is based on the phase of the local voltage.

When a train enters the track circuit, a voltage (hereinafter, referred to as a "receiving voltage") applied to the track coil of the track relay 11 so that the rails R are short-circuited by the axles of the train. The voltage ") decreases, and the phase difference between the received voltage and the local voltage becomes smaller, and the track relay 11 changes from the jacked-up state to the dropped state, thereby detecting that the train has entered the track circuit. The phase adjuster 9 is arranged to adjust the phase of the receiving voltage, and determines the phase difference between the receiving voltage and the local voltage when the track is not on track, to determine the optimal value for the track relay 11 to maintain the self-rising state.

The track circuit state determination device 100 is configured by communicating a plurality of measurement terminals 200 and a processing device 300 via a transmission line 102, and individually determines the state of one track circuit to be determined.

The measurement terminal 200 is provided at a section boundary of each track circuit, and inputs the voltage (transmission voltage) and current (transmission current) of the track signal generated by the transmission transformer 7 as being related to one of the track circuits adjacent to the boundary. In addition, the contact point condition of the rail relay 11 is input as a measurement value related to the other rail circuit adjacent to the boundary. Next, the measurement terminal 200 calculates the phase difference (transmission current phase difference) of the transmission current with respect to the transmission voltage, and outputs it to the processing device 300 through the transmission line 102 together with the input measurement value.

The transmission voltage is measured by a voltage measuring device (PT: Potential Transformer) 13 which is a transmitting-side measuring device connected to the secondary side of the transmitting transformer 7. The transmission current is measured by a current detector (CT: Current Transformer) 15 which is a transmission-side measuring instrument inserted between the secondary side of the transmission transformer 7 and the rail R. The transmission current may be calculated by detecting the voltage across the reduction resistor 5.

The processing device 300 is a computer that includes an electronic circuit for performing calculation control. Based on the measurement values input from the measurement terminals 200, each track circuit determines whether the track circuit includes at least a normal state or an abnormal state. .

[Judgment principle]
The principle of the state determination of the track circuit by the processing device 300 will be described. The processing device 300 calculates the current vector of the orbit circuit based on the measurement value input from the measurement terminal 200 related to the orbit circuit to be determined, and compares the trajectory of the current vector with the reference vector trajectory, thereby determining Determine the status of the target track circuit.

FIG. 2 is a diagram illustrating a current vector. As shown in Figure 2, the current vector is a vector with the origin O as the starting point in the XY rectangular coordinate system with the direction of the voltage vector as the positive direction of the X axis, and the phase difference θ relative to the X axis is the phase difference of the transmission current. A vector (x, y) of the magnitude of the transmitted current. The measurement value including the transmission current or the phase difference of the transmission current input from the measurement terminal 200 is associated with the measurement time. Therefore, the current vector in the measurement time can be calculated from the transmission current and the transmission current phase difference in each measurement time. Next, the time-series change of the current vector (x, y) during continuous measurement time is determined as the trajectory of the current vector.

The shape of the trajectory of the current vector varies depending on whether the train (on the track) or not (when it is not on the track) has entered the corresponding track circuit. 3A and 3B are diagrams schematically showing an example of a current vector locus. FIG. 3A shows the current vector trajectory during a constant time when the train is not on track; FIG. 3B shows the current when the train is on track for one time from when the train enters to the corresponding track circuit until it enters and exits. Vector trajectory.

As shown in FIG. 3A, when the train is not on track, the transmission current and the transmission voltage are both substantially constant, so that the current vector hardly changes, and the current vector trajectory is almost concentrated at one point.

On the other hand, when the train is on the rail, as shown in FIG. 3B, the transmission voltage is approximately constant. However, since the short-circuit position of the rail caused by the axle of the moving train changes impedance, the transmission current greatly changes. That is, the transmission current value or the phase difference of the transmission current greatly changes, so the current vector greatly changes, and compared with when the train is not on track, it becomes a current vector trajectory that changes over a wide range. Moreover, the change in the current vector is steep compared to when the train is off-track. As a specific current vector trajectory, a crescent-shaped closed circuit is drawn for the passing of one train to the corresponding track circuit. FIG. 3B shows the current vector trajectory caused by a single pass from the entry to the exit of the train to the corresponding track circuit, which becomes the current vector trajectory in the following situation: the current vector when the train is not on track, because the train After entering, the current phase difference becomes smaller, and then again, the current phase difference becomes larger, and returns to the vicinity of the current vector before the entry (that is, the current vector when the train is not on track). Moreover, the current vector trajectories are different for each orbit circuit, but if they are the same orbit circuit in the same state, they will have approximately the same shape.

In this way, the current vector trajectory is greatly different when the train is on the track and when the train is not on the track. Therefore, the current vector trajectory is discriminated to determine the state of the track circuit. FIG. 4 is a diagram illustrating the differentiation of current vector trajectories, which is a schematic diagram. In FIG. 4, the XY planes in the depth direction and the vertical direction are used as vector planes, and the right direction is used as time to summarize the time-series changes of the current vector of a certain orbital loop as three-dimensional. The XY axis system is the same as that in FIGS. 3A and 3B, and the positive direction of the X axis is the direction of the voltage vector.

The train intermittently passes through the track circuit, whereby the period when the train is on track and the period when the train is not on the track are repeated. For this reason, the on-track period and the non-on-track period of the train are distinguished as a judgment period. The discrimination boundary during the determination can be determined by whether the current vector satisfies a specific steep change condition. The so-called steep change condition is a condition that is regarded as a steep change of the current vector. For example, it can be determined as an OR condition with the following conditions between specific unit times: 1) The magnitude of the current vector changes to a value greater than the first change, and , The direction of the current vector changes above the first change angle, 2) the magnitude of the current vector changes above the second change amount, and 3) the direction of the current vector changes above the second change angle.

That is, when the train is not on track, the current vector hardly changes (see FIG. 3A), and the steep change condition is not satisfied. When the train enters the track circuit, the current vector greatly changes in unit time, so it satisfies the steep change condition. The train walks in the track circuit and continuously meets the conditions of steeply changing conditions. Then, when the train comes in and out of the track circuit and returns to the vicinity of the current vector before entering, it becomes unsatisfactory (see FIG. 3B). Therefore, the time point from when the state that does not meet the steep change condition to the state is satisfied is regarded as the entry point of the train to the track circuit, and from this time point, until the current vector meets the vicinity of the current vector immediately before the steep change condition is satisfied. Time, as the train is on track. Then, the other periods are regarded as periods when the train is not on track. Moreover, the so-called "returning to the vicinity" of the current vector earlier means that the current vector representing a coordinate value that is regarded as being slightly equal to the coordinate value represented by the previous current vector is reached. Equivalent scope. The important point is that the so-called "return to the vicinity" of the current vector just before is because it can "return" to the current vector just before, and is also suitably called "return" in this embodiment.

In this way, the current vector trajectory is divided into a period when the train is on track and a period when the train is not on track, that is, a determination period. In each determination period, it is compared with a reference vector trajectory based on the past current vector trajectory, thereby determining the The status of the track circuit in question. That is, the current vector trajectory of the train while it is on track is compared with the reference vector trajectory based on the current vector trajectory of the past train when it is on track. The comparison is based on the reference vector trajectory of the current vector trajectory during the non-on-track period of the train. In this embodiment, the reference vector trajectory is used as a discovery accuracy rate distribution representing the discovery accuracy rate corresponding to each trajectory position, thereby achieving a comparison calculation with the reference vector trajectory.

5A and 5B are diagrams illustrating a method of creating a discovery accuracy distribution. FIG. 5A is a distribution of discovery accuracy related to the reference vector trajectory when the train is not on track; FIG. 5B is a distribution of discovery accuracy related to the reference vector trajectory when the train is on the track. The distribution of the discovery accuracy rate related to the reference vector trajectory is based on the vector trajectory of one decision period as the vector trajectory of the first order, and is created based on the current current vector trajectory of multiple sub-divisions. The X and Y axes in FIGS. 5A and 5B are the same as the X and Y axes in FIGS. 3A, 3B, and 4.

The current vector trajectory is actually a collection of time-series data, so it is a set of discrete data, that is, a plurality of current vectors (values). In FIG. 5A and FIG. 5B, in order to facilitate understanding of the display, it is represented by a smaller number of drawings, but it is actually constituted by a number of drawings greater than the number of drawings shown in the drawing. By plotting the current vectors of each of the current vector trajectories constituting a plurality of times, it becomes a high-density mapping group where the possibility of obtaining a trajectory position is high, and the possibility of obtaining a trajectory position is low. Where there is no mapping or only a few mappings. As a result, the frequency distribution of the position of the trajectory as the vector trajectory can be obtained by mapping the current vector trajectories. In this embodiment, in each of the domains in which the XY plane is divided into a specific size, the ratio of the total number of current vectors plotted to the number of current vectors mapped into the domain is determined as the domain. Discovery accuracy p.

However, as a method for determining the discovery accuracy p, the following method may be used without using the number of maps as a reference. In other words, each plot related to the current vector trajectory of the first order is collected as two values for each of whether or not the XY plane is divided into a field of a specific size. If there is more than one drawing in this field, the number of drawing in this field is taken as 1. As a result, the distribution of the discovery accuracy rate obtained as a result of overlapping the current vector trajectory in the past is for each field, based on how many times the current vector trajectory has passed through the field, the discovery accuracy rate in each field, The system becomes the ratio of the current vector locus through the field.

Further, in the present embodiment, the past current vector trajectory used for the creation of the reference vector trajectory is traced back from the time point of the determination target (or the measurement time point of the measurement data of the determination target) as the most recent specific number of times. Current vector trajectory. However, it may be as follows. That is, because the track circuit is installed outdoors, the transmission current phase difference at each time is different due to the influence of the natural environment such as rain, snow, and temperature. For this purpose, for example, the current vector trajectories in each determination period may be classified by using the conditions at the time of measurement of meteorological conditions such as seasons or time zones, rain or clear, and the conditions at the time of measurement with the current vector trajectories as the determination targets may be used. Match or approximate past current vector trajectories to create a discovery accuracy distribution related to the reference vector trajectory.

By comparing the discovery accuracy distributions related to the reference vector trajectory created in this way, the anomaly degree a is calculated as an evaluation value relative to the primary current vector trajectory. FIG. 6 is a diagram illustrating calculation of the abnormality degree a. The X and Y axis systems are the same as the other figures. FIG. 6 shows an example of a current vector trajectory when a train is on a track. The degree of abnormality a with respect to the current vector locus of the first order is calculated by the following formula (1).
Normality N = Σp (i) / n
Anomaly a = 1-N ... (1)
"P (i)" is the discovery accuracy rate in the area containing the current vector i, which represents the trajectory position of one current vector trajectory, and "n" is the trajectory position, which indicates the trajectory of one current vector The number of current vectors.

That is, the normality N is the average value of the discovery accuracy rate p (i), which is equivalent to each current vector i constituting the current vector trajectory, and indicates the degree of agreement with the reference vector trajectory. Further, the normality N is an average value of the discovery accuracy rate, and therefore it is a value in a range of 0.0 ≦ N ≦ 1.0, and the abnormality a is also a value in a range of 0.0 ≦ a ≦ 1.0.

Next, the state of the track circuit to which it conforms is determined by comparing the calculated abnormality degree a with a specific threshold value. For example, if the abnormality degree a exceeds a threshold value, it is determined to be an abnormal state, and if not, it is determined to be a normal state. In addition, the threshold value may be determined in stages first, and the level of abnormality may be determined in stages. In this case, when the level is low, it can be judged as a sign of abnormality.

[Functional composition]
FIG. 7 is a functional configuration diagram of the track circuit state determination device 100. The track circuit state determination device 100 includes a plurality of measurement terminals 200 and a processing device 300 which constitute a communication connection provided at each of the section boundaries of the AC track circuit.

In the section boundary where the track circuit of the measurement terminal 200 is provided, the measurement terminal 200 is inputted with the transmission voltage and current of the transmission circuit of the transmission circuit and the contact point of the rail relay 11 inputted with the transmission circuit of the reception circuit. condition. The measurement terminal 200 includes a phase difference calculation unit 202 and a transmission control unit 204.

The phase difference calculation unit 202 calculates the phase difference of the transmission current with respect to the transmission voltage based on the measurement value measured by the transmission voltage of the transmitter of the track circuit and the transmission-side measuring device. That is, the phase difference calculation unit 202 calculates the phase difference of the transmission current with respect to the input transmission voltage.

The transmission control unit 204 uses the input voltage and transmission current as measured values related to the orbiting circuit on the transmitting side, the respective values of the phase difference calculated by the phase difference calculating unit 202, and the orbiting circuit on the receiving side. The inputted contact point condition value of the related measurement value is associated with the measurement date and time or the identification information of the track circuit, and is transmitted to the processing device 300 as the measurement data.

The processing device 300 includes an input unit 302, a display unit 304, a communication unit 306, a processing unit 310, and a memory unit 330, and can be configured as a computer.

The input unit 302 can be implemented by an input device such as a button switch, a touch panel, or a keyboard, and outputs an operation signal corresponding to the executed operation to the processing unit 310. The display unit 304 can be implemented by a display device such as an LCD (Liquid Crystal Display) or a touch panel, and performs various displays corresponding to the display signal from the processing unit 310. The communication unit 306 can be implemented by, for example, a wired or wireless communication device, and communicates with each measurement terminal 200 through a transmission line.

The processing unit 310 can be implemented by a computing device such as a CPU (Central Processing Unit). The processing unit 310 transfers instructions or data to each unit constituting the processing unit 300 according to a program or data stored in the memory unit 330, and performs the processing unit. 300 overall control. In addition, the processing unit 310 creates the current vector calculation unit 312, the current vector discrimination unit 314, the state determination unit 316, the notification unit 318, and the reference vector trajectory so as to execute the orbital circuit state determination program 332 stored in the memory unit 330. Each function block of the part 320 functions. However, these functional blocks may be constituted as independent calculation circuits by an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array).

The current vector calculation unit 312 calculates a current vector of the transmission current with respect to the transmission voltage based on the measurement value input from the measurement terminal 200. That is, in the XY rectangular coordinate system, a current vector (x, y) with a phase difference θ relative to the X axis with the voltage vector as the positive direction of the X axis as the transmission current phase value and the magnitude as the transmission current value is calculated. Each measurement value including the transmission current or the transmission current phase difference input from the measurement terminal 200 is related to the measurement time, and the current in the measurement time can be calculated from the transmission current and the transmission current phase difference in each measurement time. Vector (see Figure 2). The current vector trajectory is obtained by using the current vector of each measurement time as a time sequence.

The current vector classification unit 314 distinguishes the current vector calculated by the current vector calculation unit 312 into a time when the train is on the track and a time when the train is not on the track. That is, the current vector based on the time sequence of the measurement time is used as the entry point of the train to the track circuit that meets the time point when the steep change condition is satisfied, and the current vector is returned from this time point until the current vector meets the steep change condition. The time of the vicinity is the period during which the train related to the passing of the 1 train is on track. Next, a period other than the time when the train is on track is determined as the time when the train is not on the track (see FIGS. 3A and 3B).

The state determination unit 316 uses each period of the train on-track period and the train non-on-track period divided by the current vector discrimination unit 314 as one determination period. In each determination period, the current vector trajectory is used to determine Contains the normal and abnormal states of the track circuit in compliance. That is, in each determination period, the current vector trajectory during the determination period is compared with the reference vector trajectory to calculate the degree of abnormality a, and it is compared with a specific threshold value, thereby determining the orbit circuit to which it conforms. status. At this time, if the determination period is the time when the train is on track, compare it with the reference vector trajectory when the train is on track, and if it is not on the train, compare it with the reference vector trajectory when the train is not on track. In the present embodiment, the reference vector locus is the distribution data of the discovery accuracy rate p of each position, and the average value of the discovery accuracy rate p of the position corresponding to each current vector constituting the current vector locus is calculated as the normality N, further, the value obtained by subtracting the normality N from "1.0" is calculated as the abnormality degree a (see Fig. 6).

The notification section 318 performs specific notification corresponding to the determination result by the state determination section 316. For example, when the abnormality is determined by the state determination unit 316, it is possible to display a message indicating an abnormality of the conformed track circuit on the display unit 304, output the message sound to the sound output unit, and correspond to the track circuit. The lamp is lighted. Furthermore, in the case of state determination, when a plurality of thresholds are set in stages, whether or not the threshold is exceeded is used to report the level of the abnormality, and the threshold value indicating the level of an omen indicating the abnormality may be satisfied. In the case of conditions, it is reported that an abnormal omen has occurred.

The reference vector locus creating unit 320 creates a reference vector locus for comparison with the current vector locus. Specifically, in the present embodiment, the reference vector representation is used as the discovery accuracy rate distribution, whereby the reference vector trajectory creation unit 320 creates a discovery accuracy rate distribution related to the reference vector. Classify past current vector trajectories into when the train is on the track and when the train is not on the track. Use the current vector trajectory while the train is on the track to create a distribution of discovery accuracy related to the reference vector trajectory while the train is on the track (see figure). 5B). Moreover, the current vector trajectory when the train is not on track is used to make a discovery accuracy distribution related to the reference vector trajectory when the train is not on track (see FIG. 5A).

At this time, from the measurement date and time, a specific number of current vector traces in the past are used to create a discovery accuracy distribution related to the reference vector trace. In addition, a combination of seasonal or time zone and meteorological conditions, that is, a classification condition may be set in plural. For each classification condition, a past current vector trajectory that satisfies the classification condition is used to create a reference vector. Trace-related discovery accuracy distribution. Moreover, the current vector trajectory changes before and after the maintenance work of the track circuit. To this end, the current vector trajectory whose measurement date and time is after the implementation date and time of the most recent past maintenance work may be used to create a discovery accuracy distribution related to the reference vector trajectory.

The memory unit 330 may be implemented by a hard disk, or a memory device such as a ROM (Read Only Memory) or a RAM (Random Access Memory). The processing unit 310 stores programs or data used to control the processing device 300 in an integrated manner. As the work area of the processing unit 310, the processing unit 310 temporarily stores calculation results executed according to various programs, or input data through the input unit 302 or the communication unit 306, and the like. In the present embodiment, a track circuit state determination program 332 and track circuit data 340 are stored in the storage unit 330.

For each orbit circuit, orbit circuit data 340 is generated, corresponding to the orbit circuit ID 342 identifying the orbit circuit, and stored: measurement data 344, current vector trajectory data 346, determination result data 348, reference vector trajectory data 350, threshold data 352, And maintenance work resume data 354.

The measurement data 344 is data from the measured values that have been input by the corresponding measurement terminal 200. Specifically, the transmission voltage, the transmission current, the contact point conditions of the track relay 11, the transmission voltage, and the transmission current are associated with the measurement time. Data of each measured value of the phase difference (transmission current phase difference).

The current vector trajectory data 346 is the data of the current vector trajectory when the train is on track or when the train is not on track, that is, during each determination period. An example is shown in FIG. 8, which includes: The current on-track data 346a of the train related to the current vector trajectory and the off-time data 346b of the train related to the current vector trajectory of the train during the off-track period. All of them are associated with the trajectory numbers that identify the current vector trajectory, and the accompanying information indicating the condition when the measurement is performed is the measurement date, the measurement time zone and weather equivalent to the determination period, and the current vector trajectory. The current vector locus is the time series data of the current vector in each measurement time in the measurement time zone.

The determination result data 348 is data related to the result of the state determination relative to the current vector trajectory in each determination period. An example is shown in FIG. 9, which includes: The track time data 348a and the train non-track data 348b related to the current vector trajectory during the train non-track time period. All are correspondingly associated with the trajectory numbers of the corresponding current vector trajectories, and the reference numbers of the reference vector trajectories used for state determination, the degree of abnormality, and the determination results of the normal state or abnormal state are correspondingly associated and stored.

The reference vector trajectory data 350 is a reference vector trajectory used for status determination. An example is shown in FIG. 10, which includes: the train on-track data 350a related to the current vector trajectory when the train is on the track, and The current non-on-track data 350b related to the current vector trajectory on the track. All of them are correspondingly associated with the reference numbers that identify the reference vector trajectory, and the classification conditions, the list of current vector trajectories, and the discovery accuracy distribution data are correspondingly associated and stored. The classification conditions are the conditions of the current vector trajectory used for the creation of the reference vector trajectory, and are measured with the spring, summer, autumn and winter season, the time zone of day or night, the weather conditions such as sunny or rain, and snow. A combination of condition-related conditions. The current vector trajectory list is a list of trajectory numbers of past current vector trajectories used for the creation of the reference vector trajectory, and is selected from past current vector trajectories that satisfy the above-mentioned classification conditions. Discovery accuracy distribution data is data representing the trajectory of the reference vector, and is distribution data of discovery accuracy p (0.0 ≦ p ≦ 1.0) at each position (in this embodiment, each field) in the XY plane.

The threshold value data 352 is data for determining the threshold value of the state relative to the track circuit.

The maintenance work history data 354 is a history of the maintenance work performed on the track circuit, for example, the date and time of the maintenance work, the track circuit ID of the track circuit related to the performed maintenance work, and the performed maintenance work. The content of the corresponding corresponding and stored.

[Processing process]
FIG. 11 is a flowchart illustrating a flow of a track circuit state determination process. This processing is executed in parallel by the processing unit 310 targeting each track circuit.

First, the current vector calculation unit 312 calculates a current vector based on a measurement value input from the measurement terminal 200 at any time (step S1). Next, the current vector discrimination unit 314 determines the boundary between the time when the train is on track and the time when it is not on the track, based on whether the change in the current vector satisfies the steep change condition. Next, if the boundary of the discrimination is determined (step S3: "Yes"), the state determination unit 316 uses the current division from the previous division to the current division as one determination period, and each current vector from the determination period The current vector locus is calculated (step S5). The specific determination period is when the train is on track or when the train is not on track (step S7). Next, the calculated current vector trajectory is associated with and memorized in accordance with the measurement date and time or time zone, and the situation at the time of meteorological measurement (step S9). The reference vector trajectory creation unit 320 specifies the classification conditions of the current vector trajectory from the conditions when the measurement was performed, and uses the past current vector trajectories that satisfy the classification conditions to create a reference vector trajectory (step S11).

Next, the state determination unit 316 compares the current vector trajectory with the reference vector trajectory already created, and calculates the abnormality degree a (step S13). Next, the calculated abnormality degree a is compared with a threshold value, and the state of the track circuit is determined (step S15). After that, the notification unit 318 performs a specific notification of the display or output of the track circuit or the determination result (step S17). When the above processing is performed, the process returns to step S1 and the same processing is repeated.

[Effect]
Thus, according to this embodiment, by using a novel method of comparing the current vector trajectory opposite to the transmission voltage with the reference vector trajectory, it is possible to determine the state of the AC track circuit including at least a normal state or an abnormal state. In addition, the method of changing the current vector trajectory is different when the train is on the track and when the train is not on the track. By distinguishing them, a highly accurate determination can be obtained. In addition, because the current vector trajectories are different for each orbital loop, the past current vector trajectory of the orbital loop is used to create a reference vector trajectory, thereby making it possible to generate information that has unique characteristics in the orbital loop. .

Furthermore, because the track circuit is installed outdoors, measured values such as the transmission current are easily affected by the external environment. Therefore, the past current vector trajectories are classified based on the conditions when the measurement is performed, and the reference vector trajectories are created for each classification. The current vector trajectories of the determination target are classified into reference vectors corresponding to the conditions when the measurement is performed. By comparing the trajectories, a more accurate determination can be obtained.

Furthermore, the embodiments to which the present invention can be applied are not limited to the above-mentioned embodiments, and can be appropriately changed without departing from the scope of the present invention.

(A) Setting of the threshold is to determine the state of the track circuit. For example, the threshold may be set to be compared with the abnormality a based on the current vector trajectory based on the temporal transition of the abnormality a in the past. In this case, a threshold value is set by dividing the past current vector trajectory into when the train is on the track and when the train is not on the track. The setting of the threshold may be performed by, for example, displaying the change of the abnormality a to the user by displaying it on the display unit 304 or the like, and according to the user's operation instruction by the input unit 302. Furthermore, it is also possible to classify past current vector trajectories using classification conditions such as season or time zone, and meteorological conditions. For each classification condition, a threshold is set from the transition of the degree of abnormality a of the current vector trajectory to which it conforms.

(B) Reference vector trajectory It is not necessary to create a reference vector trajectory for each decision, and a reference vector trajectory corresponding to each of a plurality of classification conditions may be prepared in advance. Next, the current vector trajectory of the determination target may be selected and compared from the reference vector trajectory that satisfies the classification condition of the situation when the measurement was performed.

100‧‧‧Track circuit state determination device

200‧‧‧ measurement terminal

202‧‧‧Phase difference calculator

204‧‧‧Delivery Control Department

300‧‧‧ treatment device

310‧‧‧ Processing Department

312‧‧‧Current Vector Calculation Unit

314‧‧‧Current Vector Division

316‧‧‧State Judgment Department

318‧‧‧Information Department

320‧‧‧Reference vector trajectory creation unit

330‧‧‧Memory Department

332‧‧‧Track circuit state judgment program

340‧‧‧Track Circuit Information

342‧‧‧Track loop ID

344‧‧‧Measurement data

346‧‧‧Current Vector Trajectory Data

348‧‧‧ Judgment result data

350‧‧‧ Reference Vector Trajectory Data

352‧‧‧Threshold data

354‧‧‧Maintenance resume data

[Fig. 1] An application example of the track circuit state determination device.

[Fig. 2] An explanatory diagram of a current vector.

[Fig. 3A] An explanatory diagram of a current vector locus.

[Fig. 3B] An explanatory diagram of a current vector locus.

[Fig. 4] An explanatory diagram of division of a current vector.

[Fig. 5A] An explanatory diagram of creation of discovery accuracy distribution.

[Fig. 5B] An explanatory diagram of the creation of the accuracy distribution.

[Fig. 6] An explanatory diagram of calculation of abnormality.

[Fig. 7] A functional configuration diagram of a track circuit state determination device.

[Figure 8] An example of current vector locus data.

[Figure 9] An example of the judgment result data.

[Figure 10] An example of reference vector trajectory data.

[Fig. 11] The flow of the track circuit state determination processing.

Claims (6)

A track circuit state determination device is used to determine the state of an AC track circuit. The device is characterized in that: A memory unit that stores a reference vector locus of a current vector relative to a voltage sent to the AC rail circuit; The calculation unit calculates a current vector of the transmission current with respect to the transmission voltage based on the measurement value measured by the transmission-side measuring device with respect to the transmission voltage and transmission current of the transmitter of the AC rail circuit; and The determination unit calculates a vector trajectory from a trajectory of a specific period of the current vector calculated by the calculation unit, and compares the vector trajectory with the reference vector trajectory to determine the state of the AC orbit circuit. The track circuit state determining device according to claim 1, wherein: The memory unit is a memory: the reference vector trajectory when the AC rail loop train is on the track, that is, the reference vector trajectory when the track is on the track; The determination unit calculates a vector trajectory from the current vector calculated by the calculation unit when the AC rail loop train is on track, and compares the vector trajectory with the reference vector trajectory while the track is on track. For example, the track circuit state determining device of claim 1 or 2, wherein: The aforementioned memory unit is memorized: the aforementioned reference vector trajectory when the aforementioned AC track loop train is not on track, that is, the reference vector trajectory when not on track; The determination unit calculates a vector trajectory from a current vector calculated by the calculation unit when the AC rail loop train is not on track, and compares the vector trajectory with the reference vector trajectory when the train is not on track. The track circuit state determining device according to claim 2, wherein: It further includes a division unit that distinguishes the current vector from when the current vector calculated by the calculation unit satisfies a specific steep change condition from when the current vector is satisfied to when the steep change condition is satisfied. So far as the current vector when the train is on track, and the other as the current vector when the train is not on track. For example, the track circuit state determining device of claim 1 or 2, wherein: The aforementioned memory unit associates the reference vector trajectory with accompanying information indicating at least one of a season, a time zone, and a meteorological condition in which the AC orbit circuit operates, and plurally memorizes it; The determination unit selects and compares the above-mentioned situation when the measurement is performed with the reference vector locus satisfying a specific approximation condition as a comparison target. For example, the track circuit state determining device of claim 1 or 2, wherein: The aforementioned reference vector trajectory is based on the vector trajectory of the past current vector calculated by the calculation unit, and is used as data for finding the accuracy distribution corresponding to each trajectory position; The determining unit calculates an evaluation value related to the vector trajectory of the determination target based on the discovery accuracy on the discovery accuracy distribution traced by the vector trajectory of the determination target, and determines the AC orbit circuit based on the evaluation value. status.