JP6363892B2 - Train position detection system, train position detection method, and program - Google Patents

Description

  The present invention relates to a train position detection system, a train position detection method, and a program.

  There are two types of on-line position detection methods for trains: a ground detection method using a track circuit and an on-vehicle detection method using a speed generator mounted on the train.

  The ground detection method using a railroad circuit or a railroad crossing controller which is a short track circuit is widely used for alarm control of security devices such as railroad crossings.

  A method for detecting whether or not a train is in the track circuit using a closed circuit type track circuit will be described with reference to FIG.

  The track 1 includes a plurality of track circuits 1T, 2T, 3T. . . Are set sequentially. Track circuits 1T, 2T, 3T. . . May be an electrically insulated insulated track circuit or any non-insulated track circuit in which the track circuits are not insulated.

  The transmitter 21 supplies the train detection signal S1 to one end side of the track circuit 2T. The receiver 22 on the other end side of the track circuit 2T has a track relay and detects the presence or absence of the train 3 from the received voltage value Vr.

  When the train 3 is not present in the track circuit 2T, the reception voltage value Vr received by the receiver 22 on the other end side of the track circuit 2T becomes a high level. When the reception voltage value Vr becomes a high level, the track relay of the receiver 22 is lifted.

  When the train 3 enters the track circuit 2T, the track circuit 2T is short-circuited (gauge short-circuit) by the axle 31 of the train 3, so that the received voltage value Vr received by the receiver 22 on the other end side of the track circuit 2T is low. Become a level. When the reception voltage value Vr becomes a low level, the track relay of the receiver 22 falls. Therefore, it is possible to detect the presence or absence of the train 3 in the track circuit 2T from the top of the track relay and the fall.

  When electricity is applied while the left and right rails are in contact with the wheels, a voltage remains between the gauges (both ends of the axle) due to the contact resistance between the wheels and the rails and the conductor resistance of the wheels. This voltage is referred to as a residual voltage. When the train has entered the track circuit, the received voltage value Vr decreases to the residual voltage as shown in FIG.

  Moreover, recently, since the weight of trains has been reduced, there is a risk that residual voltage is likely to occur. When the residual voltage is greater than a certain value, a determination result that there is no train is generated despite the presence of the train, which is extremely dangerous in terms of train operation.

  Therefore, as described above, the closed circuit type track circuit is used to detect whether the train is present, and further, by detecting the residual voltage of the track circuit, it is possible to detect the presence or absence of the train in the track circuit. There is a technique capable of preventing the accuracy of the determination result from being lowered (for example, Patent Document 1).

JP 2001-71905 A

  The railroad crossing controller is a short track circuit used for alarm control of the railroad crossing safety device. At the start point of the detection section, when the received voltage value becomes low level, the track relay falls and it is possible to detect the entrance of the train. In the case of the point control type, the above-mentioned closed circuit type controller is It is used. At the end point of the detection section, an open circuit type controller that detects the entry of the train by supplying current to the detection device only when the train has entered the railroad crossing controller is used.

  In the ground detection method using the above-described track circuit (including a railroad crossing controller), the track circuit length having a certain length is the detection range, and in order to detect the train position with a position resolution shorter than the track circuit length. It was necessary to use different position detecting means.

  Therefore, the present invention solves the above-described problem, that is, a train position detection system and a train that can detect the position of a train with a position resolution shorter than the track circuit length by using a conventionally used track circuit. An object is to provide a position detection method and a program.

  In order to solve the above problems, a first aspect of the train position detection system according to the present invention includes a track circuit in which a contact resistance value at the time of a short circuit caused by an axle of an entering train differs depending on the position of the train, and a track circuit A voltage detection means for detecting a residual voltage value at the time of a short circuit, and an estimation processing means for estimating the position of the train on the track circuit by analyzing a fluctuation pattern of the residual voltage value detected by the voltage detection means. .

  In another aspect of the train position detection system of the present invention, when the conventional track circuit is a closed circuit type, the contact resistance value when the track enters the part of the track circuit with respect to at least a part thereof. Is characterized by being processed so as to be lower than in other cases.

  In another aspect of the train position detection system of the present invention, when the conventional track circuit is an open circuit type, the contact resistance value when the track enters the portion of the track circuit with respect to at least a portion thereof. Is characterized by being processed so as to be higher than in other cases.

  Another aspect of the train position detection system of the present invention is characterized in that the estimation processing means estimates the position of the train on the track circuit using wavelet transform.

  Another aspect of the train position detection system of the present invention is characterized in that the estimation processing means estimates the position of the train on the track circuit using a particle filter.

  One aspect of the train position detection method of the present invention is a voltage detection step for detecting a residual voltage value generated in a track circuit in which a contact resistance value at the time of a short circuit caused by an axle of an entering train differs depending on the position of the train, and a voltage An estimation step of estimating the position of the train on the track circuit by analyzing the fluctuation pattern of the residual voltage value detected by the processing of the detection step.

  One aspect of the program of the present invention is a program executed by a computer that performs processing for estimating the position of a train, and a track circuit in which a contact resistance value at the time of a short circuit caused by an axle of an entering train varies depending on the position of the train. A voltage detection step for detecting a residual voltage value generated in step, and an estimation step for estimating the position of the train on the track circuit by analyzing a fluctuation pattern of the residual voltage value detected by the processing of the voltage detection step. It is characterized by that.

  According to the present invention, the position of a train can be detected with a position resolution shorter than the track circuit length.

It is a figure which shows the outline | summary of the existing line position detection using the conventional track circuit. It is a figure which shows the outline | summary of the conventional residual voltage detection. It is a figure which shows the example of 1 structure of a train position detection system. It is a figure which shows an example of the residual voltage which the train position detection apparatus 41 detects. It is a functional block diagram which shows the function which the train position detection apparatus 41 has. It is a flowchart for demonstrating a train position detection process.

  Hereinafter, a train position detection system according to an embodiment of the present invention will be described with reference to FIGS.

  A configuration example of a train position detection system to which the present invention is applied will be described with reference to FIG. Note that portions corresponding to those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The track 1 includes a plurality of track circuits 1T ', 2T', 3T '. . . Are set sequentially. Track circuits 1T ', 2T', 3T '. . . May be an insulated track circuit that is electrically insulated, or any non-insulated track circuit that is not insulated between track circuits. In the case of an insulated track circuit, an impedance bond (not shown) or the like is provided at the track circuit boundary. Train 3 has track circuits 1T ', 2T', 3T '. . . The vehicle travels in the direction indicated by the arrow a on the track 1 constituted by

  The transmitter 21 supplies the train detection signal S1 to one end side of the track circuit 2T. The receiver 22 on the other end side of the track circuit 2T has a track relay, and detects the presence or absence of the train 3 from the received voltage value Vr received on the other end side of the track circuit 2T.

  In the track circuits 1T ′, 2T ′, 3T ′..., The contact resistance value at the time of the short circuit by the axle 31 of the train 3 entering the track circuits 1T ′, 2T ′, 3T ′. In this way, at least a part of each of the conventional track circuits 1T, 2T, 3T... Described with reference to FIG.

  Since the track circuits 1T ', 2T', 3T ',... Have the same configuration and operational effects, the case of the track circuit 2T' will be described below.

  The processing applied to the track circuit 2T ′ may be such that the contact resistance value at the time of a short circuit by the axle 31 is increased or decreased, but the closed circuit circuit circuit is processed and contacted. When the resistance value is increased, it is necessary to set a value that does not affect the train detection. The processing method may be any method as long as the contact resistance value at the time of short-circuiting by the axle 31 varies depending on the position. For example, a part of the conventional track circuit 2T may be coated with a paint. By performing application, plating, or the like, the contact resistance value at the time of a short circuit by the axle 31 can be made higher or lower only in that portion.

  The train position detection device 41 is supplied with the reception voltage value Vr in the same manner as the receiver 22. The track circuit 2T ′ is processed so that the contact resistance value at the time of short-circuiting by the axle 31 of the train 3 entering the track circuit 2T ′ is different depending on the position. The residual voltage Vr supplied to the detection device 41 shows a characteristic pattern according to the train position and speed, for example, as shown in FIG. Further, when a digital code is employed for the residual voltage change pattern, it is possible to separate the residual voltage change into a pattern and noise, and to perform more accurate position detection.

  The train position detection device 41 receives an input of the voltage value Vr between the two lines of the track circuit 2T ′, and detects whether the train 3 has entered the track circuit 2T ′ based on the value. Based on the fluctuation of the voltage value Vr according to the train position and speed, it is estimated at which position in the track circuit 2T ′ the train 3 exists, and the estimation result is output as train position information.

  FIG. 5 is a functional block diagram illustrating functions of the train position detection device 41.

  The train position detection device 41 has functions of a voltage detection unit 51, an estimation processing unit 52, and a train position information output unit 53.

  The voltage detection unit 51 receives an input of the voltage value Vr supplied from one end of the track circuit 2T ′ and supplies the detected voltage value to the estimation processing unit 52.

  The estimation processing unit 52 analyzes a characteristic pattern according to the train position and speed, which the voltage value Vr supplied from the voltage detection unit 51 has, estimates the train position, and supplies it to the train position information output unit 53. To do.

  As a pattern analysis method, various methods can be used. For example, wavelet analysis can be used for effective analysis. However, since the residual voltage originally fluctuates due to non-uniformity of the contact resistance of the rails and wheels, the analysis load may increase. With regard to an increase in analysis load, for example, by using a particle filter, knowledge of vehicle dynamics can be utilized for analysis, and analysis performance can be improved.

  The train position information output unit 53 outputs the estimation result of the train position supplied from the estimation processing unit 52 as train position information.

  In this way, with respect to the track circuit 2T ′, the residual voltage is reduced by locally reducing the contact resistance value or by locally increasing the contact resistance value within a range where the problem of short circuit failure does not become apparent. In addition, a characteristic pattern corresponding to the train position and speed can be generated. And the estimation process part 52 of the train position detection apparatus 41 detects this train position information with a position resolution shorter than the track circuit length of track circuit 2T 'by analyzing this pattern accurately. Is possible.

  Next, with reference to the flowchart of FIG. 6, the train position detection process which the train position detection apparatus 41 performs is demonstrated.

  In step S <b> 1, the voltage detection unit 51 receives the voltage value Vr and supplies it to the estimation processing unit 52.

  In step S2, the estimation processing unit 52 uses the voltage value Vr supplied from the voltage detection unit 51 in step S1, that is, the residual voltage value of the track circuit 2T ′, to determine the train position using a predetermined pattern analysis method. The estimation process is executed, and the estimation result is supplied to the train position information output unit 53.

  In step S3, the train position information output unit 53 outputs the estimation result of the train position supplied from the estimation processing unit 52 in step S2 as train position information, and the process ends.

  By such processing, a characteristic residual voltage pattern corresponding to the train position and speed can be analyzed with high accuracy, so that the train position information can be obtained with a position resolution shorter than the track circuit length of the track circuit 2T ′. The position can be detected.

  As shown in FIG. 1, at least a part of each of the conventional track circuits 1T, 2T, 3T... May be processed into track circuits 1T ′, 2T ′, 3T ′. However, at least a part of at least one of the conventional track circuits 1T, 2T, 3T... May be processed. In the range of the track circuit XT ′ (X = 1, 2, 3,...) In which at least a part of the conventional track circuit is processed, it is needless to say that the above-described functions and effects are exhibited. Absent. Needless to say, the so-called level crossing controller is also a form of the track circuit, and the same technique can be used.

  By using the above-described technique, it is possible to detect the position of the train with a position resolution shorter than the track circuit length using a conventional track circuit.

  Further, by using the above-described technique, it is possible to estimate the control section length of the railroad crossing controller that is a short track circuit without requiring additional equipment.

  In addition, when the conventional track circuit is a closed circuit type track circuit, it is preferable to process a part of the conventional track circuit so that the residual voltage value is low, and the conventional track circuit is an open circuit type track circuit. In this case, it is preferable to process a part of the conventional track circuit so that the residual voltage value becomes high.

  The series of processes described above can be executed by hardware or can be executed by software. When a series of processing is executed by software, a program constituting the software may execute various functions by installing a computer incorporated in dedicated hardware or various programs. For example, it is installed from a program recording medium in a general-purpose personal computer or the like.

  The program executed by the computer may be a program that is processed in time series in the order described in this specification, or in parallel or at a necessary timing such as when a call is made. It may be a program for processing.

  The embodiments of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Track, 1T, 1T ', 2T, 2T', 3T, 3T '... Track circuit, 3 ... Train, 21 ... Transmitter, 22 ... Receiver, 31 ... Axle, 41 ... Train position detection device, 51 ... Voltage Detection part 52 ... Estimation processing part 53 ... Train position information output part

Claims (7)

The track circuit in which the contact resistance value at the time of a short circuit by the axle of the train that has entered is different depending on the position of the train,
In the track circuit, and a voltage detecting means for detecting the residual voltage value at the time of short circuit,
A train position detection system comprising: estimation processing means for estimating the position of the train on the track circuit by analyzing a fluctuation pattern of the residual voltage value detected by the voltage detection means. The train position detection system according to claim 1,
When the conventional track circuit is a closed circuit type, the contact resistance value is lower when the train enters the portion of the track circuit compared to other cases. The train position detection system is characterized by being processed as described above. The train position detection system according to claim 1,
When the conventional track circuit is an open circuit type, the contact resistance value of the track circuit is higher than that of other cases when the train enters the portion of the track circuit. The train position detection system is characterized by being processed as described above. The train position detection system according to claim 1,
The said estimation process means estimates the position of the said train on the said track circuit using wavelet transformation. The train position detection system characterized by the above-mentioned. The train position detection system according to claim 1,
The estimation processing means estimates the position of the train on the track circuit using a particle filter. A voltage detection step of contact resistance at the time of short circuit caused by entering the train axles detecting the residual voltage value that occur in the track circuit to be different values depending on the position of the train,
A train position detection method comprising: an estimation step of estimating a position of the train on the track circuit by analyzing a fluctuation pattern of the residual voltage value detected by the processing of the voltage detection step. A program executed by a computer that performs processing for estimating the position of a train,
A voltage detection step of contact resistance at the time of short circuit caused by entering the said train axle detects the residual voltage value that occur in the track circuit to be different values depending on the position of the train,
An estimation step of estimating a position of the train on the track circuit by analyzing a fluctuation pattern of the residual voltage value detected by the processing of the voltage detection step.

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