KR102346651B1 - Intelligent track circuit device and monitoring system for monitoring lane states - Google Patents

Abstract

The track circuit device according to the technical idea of the present disclosure may be configured to check the state of the track on which the train operates based on at least one of a detection signal and a monitoring signal transmitted between a transmitter and a receiver, wherein the transmitter includes a center frequency a detection signal generator configured to generate the detection signal having a detection frequency component that differs from the center frequency by a first frequency and a monitoring signal generator configured to generate the monitoring signal having a first monitoring frequency component that differs from the center frequency by a second frequency Including, the receiver may include a detector configured to detect whether the track is occupied by the train based on the detection signal and a monitor configured to check whether or not the track is abnormal based on the monitoring signal.

Description

INTELLIGENT TRACK CIRCUIT DEVICE AND MONITORING SYSTEM FOR MONITORING LANE STATES

The technical idea of the present disclosure relates to a track circuit device, and more specifically, to a track circuit device for checking whether or not a line is abnormal.

A track circuit device may refer to a circuit that uses a track (or a track, hereinafter referred to as a track) as part of an electric circuit to detect a train on the track and transmits a signal to the train on the ground through the track. The track 　 circuit 　 device may generate a railway signal related to a train using various methods such as an AC type, a DC type, an impulse type, an audio frequency (hereinafter, AF) type, a code type, and the like.

When an abnormality occurs in a line, an accident may be induced, so it is important to detect a failure of the line in order to prevent an accident. In order to check whether the track, circuit, and device are normally performing the operation of transmitting and receiving railway signals, it is necessary to periodically check whether the track, circuit, and device are operating normally.

The problem to be solved by the technical idea of the present disclosure is a track circuit device that detects whether a track is occupied by a train by generating a detection signal, and checks whether or not a track is abnormal by generating a monitoring signal, or monitoring including a track circuit device to provide a system.

The track circuit device according to the technical idea of the present disclosure is a track circuit device configured to check the state of a track on which a train runs based on at least one of a detection signal and a monitoring signal transmitted between a transmitter and a receiver, the transmitter comprising: a detection signal generator configured to generate the detection signal having a detection frequency component that differs from a center frequency by a first frequency and a monitoring signal configured to generate the monitoring signal having a first monitoring frequency component that differs from the center frequency by a second frequency a signal generator, wherein the receiver may include a detector configured to detect whether the track is occupied by the train based on the detection signal, and a monitor configured to check whether or not the track is abnormal based on the monitoring signal have.

The center frequency, the detection frequency, and the monitoring frequency according to the spirit of the present disclosure may be included in an audio frequency band.

The monitoring signal generator according to the technical idea of the present disclosure may generate the monitoring signal further having a second monitoring frequency component that is different from the center frequency by a third frequency.

The monitoring frequency and the detection frequency according to the technical spirit of the present disclosure may be characterized in that they are included in an operating frequency range that is a frequency band in which the track circuit device operates normally.

The monitor according to the technical idea of the present disclosure, in the test mode, by searching the operating frequency range may be characterized in that it checks whether the line is abnormal.

The receiver according to the technical idea of the present disclosure may further include a monitor device configured to display whether the line is abnormal.

The monitoring system according to the technical idea of the present disclosure may include a plurality of track circuit devices configured to check the state of the track on which the train operates based on at least one of a detection signal and a monitoring signal transmitted between a transmitter and a receiver, A first transmitter included in the first orbital circuit arrangement includes: a detection signal generator configured to generate a first detection signal having a first detection frequency component that differs from a first center frequency by a first frequency; a supervisory signal generator configured to generate a first supervisory signal having a first supervisory frequency component that differs by two frequencies, wherein a first receiver included in the second track circuit arrangement is configured to: may include a detector configured to detect whether the train is occupied by the train, and a monitor configured to check whether or not there is an abnormality in the line based on the first monitoring signal.

The monitoring signal generator according to the technical spirit of the present disclosure may generate the monitoring signal further having a second monitoring frequency component that is different from the first center frequency by a third frequency.

The detection signal generator of the second transmitter included in the second track circuit device according to the technical spirit of the present disclosure generates a second detection signal having a second detection frequency component that is different from a second center frequency by a fourth frequency, The supervisory signal generator of the second transmitter comprises a supervisory signal generator configured to generate a second supervisory signal having a third supervisory frequency component that differs from the second center frequency by a fifth frequency, wherein the second center frequency is It may be characterized in that it is different from the first center frequency.

The monitoring signal generator according to the technical spirit of the present disclosure may generate the monitoring signal further having a fourth monitoring frequency component that is different from the second center frequency by a sixth frequency.

The first detection frequency and the first monitoring frequency according to the technical spirit of the present disclosure may be characterized in that they are included in an audio frequency band in which the track circuit device operates normally.

According to the technical idea of the present disclosure, the track circuit device may not only detect the presence or absence of a train occupying the track based on the detection signal and the monitoring signal, but may also determine whether the track is abnormal. The track circuit device can determine the degree of deterioration of the line, and by repairing the deteriorated line, the failure can be prevented in advance.

In addition, the track circuit device according to the technical idea of the present disclosure may immediately check whether a line is abnormal by additionally generating a monitoring signal based on a monitoring frequency different from the detection frequency.

Furthermore, the track circuit device according to the technical idea of the present disclosure can determine whether the state of the track is in a normal range by searching all the operating frequency bands of the track circuit device when the train is not running.

1 is a block diagram illustrating a track circuit device electrically connected to a track according to an exemplary embodiment of the present disclosure.
2 is a graph illustrating a transmission railway signal generated by a track circuit device according to an exemplary embodiment of the present disclosure over time.
3 is a diagram illustrating a transmission module according to an exemplary embodiment of the present disclosure.
4 and 5 are graphs illustrating signals generated according to an exemplary embodiment of the present disclosure in the frequency domain.
6 and 7 are graphs illustrating, in the frequency domain, a signal corresponding to an abnormal state of a line detected by the track circuit device according to an exemplary embodiment of the present disclosure.
8 is a diagram illustrating a manner in which a plurality of track circuit devices transmit/receive signals in a monitoring system according to an exemplary embodiment of the present disclosure.

The embodiments of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art. Since the present invention may have various changes and may have various forms, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing each figure, like reference numerals are used for like elements. In the accompanying drawings, the dimensions of the structures are enlarged or reduced than the actual size for clarity of the present invention.

The terms used in the present disclosure are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present disclosure, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification is present, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof. Ordinal expressions such as "first ~" and "second ~" used in the present disclosure are not limited to that "first ~" precedes "second ~", and are understood to be expressed differently in similar configurations. should be

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

The track circuit is a circuit configured as a part of an electric circuit to detect the presence or absence of occupancy of a train track (or track, hereinafter referred to as a track) and detect the position of the vehicle. It may be a device for sensing.

1 is a block diagram illustrating a track circuit device electrically connected to a track according to an exemplary embodiment of the present disclosure.

The track circuit device 10 transmits a railway signal for detecting the track occupation of the train to another track circuit device through the track, and the track circuit device 10 determines whether the train exists on the track based on the received rail signal. can detect whether Also, the track and circuit device 10 may transmit information on the track condition to the train using the rail signal. The track state may include, but is not limited to, information on other trains occupying the track, short circuit/open line of the track, faulty line, power supply information, and the like. In an exemplary embodiment, the track circuit device 10 may directly/indirectly control the signal control equipment of the ground signaling method and the in-vehicle signaling method by transmitting the on-board speed code to the train.

The track circuit device 10 may function as a Track Circuit Level Detection System (TLDS). The track circuit function monitoring device can inform the maintenance personnel of the electrical characteristics of the track circuit so that the function of the track circuit can be maintained in advance. The track circuit device 10 receives information for monitoring the track circuit (eg, voltage value, train track occupancy information, signal information, track switch information, operating interval with the preceding train, braking distance, etc.) in real time. and analyze the line failure and line information. In an exemplary embodiment, the orbital circuit device 10 may operate in an Audio Frequency (AF) band, which is a frequency band of 16 to 20,000 Hz that can be heard by humans.

Referring to FIG. 1 , both sides of the tracks 21 and 23 on which the train runs and the track circuit device 10 may be electrically connected. The orbital circuit device 10 may include a transmitter (TX) 100 , a receiver (RX) 200 , and a retrace current device 300 .

The transmitter 100 may generate a rail signal for detecting the track occupation of the train or checking whether the track is abnormal, and a receiver of another track circuit device (second track circuit device) through the tracks 21 and 23 It may be configured to transmit to, and the receiver 200 may detect the track occupancy of the train based on the rail signal received from another track circuit device (the third track circuit device), or check whether the track is abnormal. The abnormality of the track may mean whether there is an abnormality in the state of the track, and information on other trains occupying the track, short circuit/opening of the track, faulty line, power supply information, information on occupancy of the train track, information on the signal signal, and the track changer As described above, it may include information, a running interval with the preceding train, a braking distance, and the like.

The transmitter 100 may include a transmitter tuner 110 , a transmitter module 120 , and a power supply 130 , and the transmitter module 120 may include a monitoring signal generator 123 and a detection signal generator 121 . can

The transmitter tuner 110 may be electrically connected to the lines 21 and 23, and may perform impedance matching to reduce reflection due to an impedance difference between the track circuit device 10 and the lines 21 and 23. have. In an exemplary embodiment, the transmitter tuner 110 may include a passive element such as an inductor, a capacitor, and/or a resistor. The transmitter tuner 110 may further include an impedance bond.

The transmission module 120 may generate a detection signal DS oscillating with a detection frequency for detecting a train, and a monitoring signal MS oscillating with a monitoring frequency for monitoring a line. The detection signal DS and the monitoring signal MS may be synthesized and provided to the transmitter tuner 110 as a transmission railway signal TX_S. In an exemplary embodiment, the monitoring frequency and the detection frequency may be included in an audible frequency (AF) band. In an exemplary embodiment, the monitoring frequency and the detection frequency may be frequencies that differ by a predetermined frequency from a predetermined center frequency for signal processing between the plurality of orbital circuit devices.

The detection signal generator 121 may oscillate the detection signal DS with a detection frequency that is different from the center frequency by the first frequency. The detection signal DS may refer to a signal used to detect whether a train is present (whether the train is occupied) on the tracks 21 and 23 . Generation of the detection signal DS by the detection signal generator 121 will be described in detail with reference to FIGS. 2 to 4 .

The monitoring signal generator 123 may oscillate the monitoring signal MS with at least one monitoring frequency different from the center frequency by a second frequency. The monitoring signal MS is information about other trains occupying the tracks 21 and 23, short circuit/opening of the tracks, faulty lines, power supply information, signal information, track changer information, operating interval with the preceding train, braking It may refer to a signal used to monitor a distance or the like. Generation of the monitoring signal MS of the monitoring signal generator 123 will be described in detail with reference to FIGS. 3 to 7 .

The power supply 130 may supply power to the transmission module 120 to generate a detection signal DS and a monitoring signal MS, and in addition to this, to the transmission module 120 for various operations of the transmitter 100 power can be supplied. In an exemplary embodiment, the power supply 130 may further include a voltage stabilizer configured to step-up or step-down to apply a power voltage to the transmission module 120 .

The receiver 200 may include a receiver tuner 210 , a receiver module 220 , a track relay 230 , a transmitter 240 and a monitor device 250 , and the receiver module 220 includes a detector 221 . and a monitor 223 .

The receiver tuner 210 may impedance-match the detection signal DS and the monitoring signal MS received through the lines 21 and 23 and provide them to the reception module 220 .

The reception module 220 may receive the reception rail signal RX_S. The reception module 220 may analog-digitally convert the received railway signal RX_S, and may perform Fast Fourier Transformation (FFT) to convert it into a frequency domain. In an exemplary embodiment, the detector 221 and the monitor 223 of the reception module 220 may be implemented as one Digital Signal Processor (DSP) Field Effect Transistor (FET).

The detector 221 may detect whether a train exists on the tracks 21 and 23 based on the detection signal DS. The detector 221 may detect whether the train on the tracks 21 and 23 is occupied by comparing the amplitude at the detection frequency of the detection signal DS with a predefined reference value.

The monitor 223 may check whether the lines 21 and 23 are abnormal based on the monitoring signal MS. The monitor 223 may check whether the lines 21 and 23 are abnormal by comparing the amplitude at the monitoring frequency of the monitoring signal MS with a predefined reference value. The detection and confirmation operations of the detector 221 and the monitor 223 will be described in detail with reference to FIGS. 4 to 7 .

The track relay 230 may short-circuit/open the track circuit when an event such as occupancy of the train or transmission failure occurs. In an exemplary embodiment, the orbital relay 230 of the orbital circuit arrangement 10 may fall, thereby shorting the orbital circuit. When a train enters the track circuit, the track circuit is shorted by the axle so that the track relay 230 may not be excited (magnetized), and even if the rail is broken or the track circuit itself fails, the track relay 230 is excited it may not be When the track circuit is not occupied by the train, that is, when there is no train in the track circuit, the track relay 230 may be excited by the current flowing from the power source. When the signal connected to the track relay 230 passes through the excitation contact point, a green light instructing train progress may be displayed, and when passing through the non-excitation contact point, a red light for stopping the train may be displayed, and the signal is on the train. can be automatically controlled by

The monitor device 240 may display information on the presence or absence of a train detected by the reception module 220 or the presence or absence of abnormalities in the tracks 21 and 23 so that a maintenance person can immediately check the information. According to an exemplary embodiment, the monitor device 240 may be a device that manages the overall railroad system by summing information output from a plurality of track circuit devices 10 provided in a plurality of stations. The monitor device 240 may be included on one surface of the case of the receiver 200, and may be provided in various forms such as a 7-segment display device, a liquid crystal display (LCD), and a light emitting diode (LED). Information may be displayed on a display device. The repairer can determine the failure of the line based on the displayed information or the analyzed line information, or prevent the failure of the line in advance. Although not shown in FIG. 1 , information regarding the existence of a train or information regarding whether the tracks 21 and 23 are abnormal may be stored in the memory.

The retrace current device 300 may be a path for the retrace current and may measure the retrace current. Here, the return line may be a line for returning a catenary current to an overhead branch line in the middle of the tracks 21 and 23 on which the train runs, and the catenary current may be a current for supplying power to the train.

In an exemplary embodiment, the retrace current device 300 may include passive components such as inductors, capacitors, and/or resistors.

The tracks 21 and 23 may be divided at positions such as in the hall, departure, relay, occlusion, and inbound signal (including inbound and outbound sign). In order to divide the track into units of a certain section and configure a circuit independent from the adjacent track circuit, a track control frame may be installed in the boundary section. In an exemplary embodiment, in order to minimize the connection resistance of the rail joint in the track circuit, the rail at both ends is connected with a bond, and then a power source is connected to one side and a track relay 230 may be installed to the other side.

According to an exemplary embodiment, the transmission module 120 may generate the transmission railway signal TX_S having an amplitude of 10V. The amplitude of the transmission rail signal TX_S passes through the lines 21 and 23 and may drop to a voltage of 5 to 6V, and may drop to a voltage of 0.5 to 1V near the receiver 200 . In the receiving module 220, the amplitude of the received rail signal (RX_S) may be 0.15 ~ 1.6V.

The track circuit device 10 may detect a train in relation to other track circuit devices or check whether the tracks 21 and 23 are abnormal. The transmitter 100 of the first orbital circuit arrangement 10 may provide a detection signal DS and a monitoring signal MS to a receiver of the second orbital circuit arrangement, the receiver of the first orbital circuit arrangement 10 ( 200 may receive a detection signal DS and a monitoring signal MS from a transmitter of the third track circuit device. In this way, using at least two track circuit devices, a monitoring system for checking whether the train occupancy between the stations where the train operates and whether there is a track abnormality between the stations may be operated. A monitoring system using a plurality of orbital circuit arrangements is illustrated in FIG. 8 .

In order to check whether the voltage transmitted or received by the track circuit device 10, the operating state, and whether the railway signal is defective, the manager traverses each station and directly measures and inspects the signal in units of weeks, months, and years there was ham According to the technical idea of the present disclosure, by receiving the detection signal DS and the monitoring signal MS generated by the transmitter 100 to the receiver 200, whether or not the train occupies the tracks 21 and 23, as well as the track ( 21, 23) It is possible to guarantee the normal operation of the track circuit device 10 by constantly monitoring whether there is an abnormality. In addition, the track circuit device according to the technical idea of the present disclosure can immediately and accurately check whether the line is abnormal by additionally generating a monitoring frequency different from the detection frequency. Furthermore, the track circuit device according to the technical idea of the present disclosure can preemptively determine whether the state of the track is in a normal range by searching all the operating frequency bands of the track circuit device when the train is not running.

2 is a graph illustrating a transmission railway signal generated by a track circuit device according to an exemplary embodiment of the present disclosure over time. The horizontal axis of FIG. 2 is an axis related to time, and the vertical axis is an axis related to frequency. FIG. 2 is explained with reference to FIG. 1 .

The orbital circuit arrangement 10 uses a different center frequency from the adjacent orbital circuit arrangement to avoid frequency interference that occurs between adjacent orbital circuit arrangements. In an exemplary embodiment, the center frequency used in the orbital circuit arrangement 10 may be four (A, B, C, D), but is not limited thereto. The four center frequencies (A, B, C, D) are more than a predetermined frequency (eg, 300 Hz) so that the operating frequency bands required for each orbital circuit device to operate do not overlap each other. can be away In FIG. 2 , it is assumed that the orbital circuit device 10 uses the A frequency band for convenience of explanation.

The detection signal generator 121 may generate the detection signal DS based on the two detection frequencies f0-fd and f0+fd that are different from the center frequency f0 by the first frequency fd. The track circuit device 10 may detect whether the tracks 21 and 23 are occupied by the train based on the detection signal DS provided through the tracks 21 and 23 . In an exemplary embodiment, the detection signal generator 121 may oscillate the detection signal MS by alternately using the two detection frequencies f0-fd and f0+fd. A period in which the two detection frequencies f0-fd and f0+fd change, ie, a switching time, may be equal to the reciprocal of the switching frequency fs.

The detector 221 uses two detection frequencies f0-fd, f0+fd that are different by the center frequency f0 and the first frequency fd to determine whether the tracks 21 and 23 are occupied by the train. can be detected. The detector 221 may compare a predetermined threshold based on the amplitude of the center frequency f0 with the magnitudes of the amplitudes of the two detection frequencies f0-fd, f0+fd, and if the amplitude difference exceeds the detection threshold, the line It may be determined that a train exists at ( 21 , 23 ), and if the amplitude difference is equal to or less than a detection threshold, it may be determined that a train does not exist on the tracks ( 21 , 23 ). How the detector 221 detects train occupancy is described in detail in FIG. 3 .

In an exemplary embodiment, according to frequency band A, the center frequency f0 may be 1699 Hz, the first frequency fd is 17 Hz, the first detection frequency f0+fd is 1716 Hz, the second detection frequency ( f0-fd) may be 1682 Hz, but is not limited thereto.

3 is a diagram illustrating a transmission module according to an exemplary embodiment of the present disclosure. 3 is explained in conjunction with FIGS. 1 and 2 . A detection signal DS and a monitoring signal MS may be generated in the transmission module 120 , and the transmission module 120 may further include a mixer 125 and an oscillator 126 .

The oscillator 126 may generate a detection signal DS oscillating at a first detection frequency (f0+fd) and a second detection frequency (f0-fd), a first monitoring frequency (f0+fm), a second detection frequency (f0+fm) It is possible to generate the monitoring signal MS oscillating at the monitoring frequency f0-fm.

In the detection signal generator 121 , switching may occur continuously between the first detection frequency f0+fd and the second detection frequency f0-fd. The detection signal generator 121 may generate the detection signal DS oscillating at the first detection frequency f0+fd or the second detection frequency f0-fd according to the connection of the switch. The detection signal generator 121 may selectively determine the first detection frequency f0+fd and the second detection frequency f0-fd according to the switching frequency fs.

In a similar manner, in the monitoring signal generator 123, switching may occur continuously between the first monitoring frequency (f0+fm) and the second monitoring frequency (f0-fm). The monitoring signal generator 123 may generate the monitoring signal MS oscillating at the first monitoring frequency (f0+fm) or the second monitoring frequency (f0-fm) according to the connection of the switch. The monitoring signal generator 123 may selectively determine the first monitoring frequency (f0+fm) and the second monitoring frequency (f0-fm) according to the switching frequency fs, similar to that described above. However, the present invention is not limited thereto, and the switching frequency fs provided to the monitoring signal generator 123 may be different from the switching frequency fs provided to the detection signal generator 121 .

According to an exemplary embodiment, the second frequency fm may be 51 Hz. That is, the second frequency fm may be set to be three times greater than the first frequency fd. Accordingly, the first monitoring frequency (f0+fm) may be 1750Hz, and the second monitoring frequency (f0-fm) may be 1648Hz. However, the present invention is not limited thereto, and the second frequency fm may be a frequency of various numerical values different from the first frequency fd. In an exemplary embodiment, the detection frequencies f0-fd, f0+fd and the monitoring frequencies f0+fm, f0-fm may be included in the audible frequency band.

The mixer 125 may synthesize the detection signal DS provided by the detection signal generator 121 and the monitoring signal MS provided by the monitoring signal generator 123, and as a result, the transmission railway signal TX_S can create The transmission rail signal TX_S may be provided to the transmitter tuner 110 .

4 and 5 are graphs illustrating signals generated according to an exemplary embodiment of the present disclosure in the frequency domain. The horizontal axis is a frequency axis, and the vertical axis is the amplitude of the frequency, that is, the magnitude of the frequency, which may be expressed on a logarithmic scale. A frequency band is assumed.

For the description of FIG. 4 , FIGS. 1 and 3 are referred to together. The detector 221 may convert the received detection signal DS into a frequency domain. The detector 221 may know in advance that the amplitude of the center frequency f0 for the frequency band A is A0. The detector 221 may detect that the second amplitude at the first detection frequency f0+fd and the second detection frequency f0-fd is A1 dB.

The detector 221 may compare the threshold value and the second amplitude A1 of the detection frequencies f0+fd, f0-fd, and if the amplitude difference A0-A1 exceeds the detection threshold, the lines 21 and 23 It can be determined that there is a train at , and when the amplitude difference A0 - A1 is equal to or less than the detection threshold, it can be determined that the train does not exist on the tracks 21 and 23 .

For the description of FIG. 5 , FIGS. 1 , 3 , and 4 are referred to together. According to the spirit of the present disclosure, the monitor 223 may detect the amplitude of one or more monitoring frequencies (f0+fm, f0-fm) different from the detection frequencies (f0+fd, f0-fd). 5 shows three monitoring frequency pairs (f0+fm1, f0-fm1), (f0+fm2, f0-fm2), and (f0+fm3, f0-fm3) for convenience of explanation, but is not limited thereto. does not The monitoring frequency (f0+fm, f0-fm) may be a frequency used to monitor a short circuit/opening of a line, a defect in a line, power supply information, etc. in addition to the track occupation of the train. The monitoring frequencies f0+fm, f0-fm may be smaller or larger than the detection frequencies f0+fd, f0-fd. The monitor 223 may determine that the track circuit is in a bad state because the third amplitude A2 of the monitoring frequencies f0+fm, f0-fm is less than or equal to a threshold value, and monitors information related to the bad state. can be provided to In an exemplary embodiment, the amplitude at the monitoring frequencies (f0+fm, f0-fm) may mean whether various lines are abnormal, such as a defect in a line or unstable power supply.

The amplitude at the monitoring frequency (f0+fm, f0-fm) can be displayed by the monitor device (FIGS. 1, 240), and the maintainer reviews the numerical values, alarms, etc. displayed on the monitor device (FIGS. 1, 240) and troubles The situation can be recognized immediately, and the time until the lines 21 and 23 are repaired to a normal state can be shortened.

6 and 7 are graphs illustrating, in the frequency domain, a signal corresponding to an abnormal state of a line detected by the track circuit device according to an exemplary embodiment of the present disclosure. The horizontal axis may be a frequency-related axis, and the vertical axis may be an amplitude of a frequency, that is, a magnitude of the frequency. A frequency band is assumed. For the explanation of FIGS. 6 and 7 , FIGS. 1 and 5 are referred to together.

During a time when the train is not running (eg, late at night or during an inspection period), the track circuit device 10 may be operated in a test mode for overall monitoring whether or not the tracks 21 and 23 are defective. In response to the track circuit device 10 being operated in the test mode, the monitoring signal generator 123 uses the monitoring frequency (f0+fm, f0-fm) to verify the entire operating frequency band of the track circuit device 10 . The monitoring signal MS may be oscillated. The monitor 223 may receive the monitoring signal MS based on the monitoring frequencies f0+fm, f0-fm for all of the operating frequency bands, and by plotting the amplitudes over the operating frequency bands, the trajectory It is possible to determine whether the circuit is abnormal.

6 shows a state in which the center frequency is shifted rightward from f0 to f0'. When the orbital circuit is in a normal state, that is, when there is no abnormality in the lines 21 and 23, the graph can be plotted symmetrically on both sides around the center frequency f0, and the amplitude for all of the operating frequency bands is n It may be shown as an envelope. In an exemplary embodiment, when the orbital circuit is in an abnormal state, that is, when there is an abnormality in the lines 21 and 23, the center frequency may be plotted while shifted to the right by f0'. In this case, it may mean an abnormal state of the line such as the lines 21 and 23 are defective or the offset is wrong.

7 shows a state in which distortion occurs in the envelope of the graph. In this case, the center frequency f0 is the same, but the amplitudes for all of the operating frequency bands are not symmetrical, and there is distortion and distortion compared to the normal envelope, which means an abnormal state of the lines 21 and 23 can do.

The graphs shown in FIGS. 6 and 7 can be displayed by the monitor device ( FIGS. 1 and 240 ), the maintenance person can review the graphs and immediately recognize the problem situation, and the lines 21 and 23 are in a normal state. The time until repair can be shortened.

8 is a diagram illustrating a manner in which a plurality of track circuit devices transmit/receive signals in a monitoring system according to an exemplary embodiment of the present disclosure.

As described above, the orbital circuit arrangement 10 uses a different center frequency from the adjacent orbital circuit arrangement in order to prevent frequency interference occurring between the adjacent orbital circuit arrangements. In FIG. 8 , it is assumed that the frequency band A and the frequency band B are used between the plurality of orbital circuit devices for convenience of explanation. The two center frequencies A and B may be set to have a difference of 600 Hz so that an operating frequency band required for each orbital circuit device to operate does not overlap each other, but is not limited thereto.

A line may be connected between the first station and the second station, and a plurality of track circuit devices may be present in the line. The first orbital circuit arrangement may include a first transmitter TX1 200_1 and the second orbital circuit arrangement may include a first receiver RX1 100_1 and a second transmitter TX2 200_2 and the third orbital circuit arrangement may include a second receiver (RX2) 100_2 and a third transmitter (TX3) 200_3, and the fourth orbital circuit arrangement may include a third receiver (RX3) 100_3. can do.

The first transmitter 200_1 may provide the transmission railway signal TX_S to the first receiver 100_1 through the track. According to an exemplary embodiment, since the transmission railway signal TX_S generated by the first transmitter 200_1 uses the A frequency band, the center frequency f0 may be 1699 Hz, but is not limited thereto. The first receiver 100_1 detects the train occupancy between the first transmitter 200_1 and the first receiver 100_1 based on the received rail signal RX_S oscillated with a center frequency f0 of 1699 Hz or whether there is a track abnormality can be checked.

Similarly, the second transmitter 200_2 may provide the transmission railway signal TX_S to the second receiver 100_2 through the track. According to an exemplary embodiment, since the transmission railway signal TX_S generated by the second transmitter 200_2 uses the B frequency band, the center frequency f0 may be 1999 Hz, and the detection frequencies f0+fd, f0- fd) and monitoring frequencies (f0+fm, f0-fm) may be different from the detection frequencies (f0+fd, f0-fd) and monitoring frequencies (f0+fm, f0-fm) of frequency band A, but are limited thereto It may or may not be the same. The second receiver 100_2 detects the train occupancy between the second transmitter 200_2 and the second receiver 100_2 based on the received rail signal RX_S oscillated with a center frequency f0 of 1999 Hz or whether there is a track abnormality can be confirmed is the same.

Similarly, the third transmitter 200_3 may provide the transmission railway signal TX_S to the third receiver 100_3 through the track, and the transmission railway signal generated by the third transmitter 200_3 according to the exemplary embodiment ( Since TX_S) uses the A frequency band, the center frequency f0 may be 1699 Hz.

In FIG. 8, for convenience of explanation, the first to third receivers 100_1, 100_2, 100_3 and the first to third transmitters 200_1, 200_2, 200_3 are shown to be installed next to the line separated from each other, but in the embodiment Accordingly, a plurality of track circuit devices including the first to third receivers 100_1, 100_2, 100_3 and the first to third transmitters 200_1, 200_2, 200_3 are part of the monitoring system 1 by means of a device centralized installation method can be installed together in the same rack.

In this way, using at least two track circuit devices, the monitoring system 1 for checking whether the train occupancy between the stations where the train operates and whether there is an abnormality between the tracks between the stations may be operated.

Exemplary embodiments have been disclosed in the drawings and specification as described above. Although the embodiments have been described using specific terms in the present specification, these are used only for the purpose of explaining the technical spirit of the present disclosure, and are not used to limit the meaning or the scope of the present disclosure described in the claims. . Therefore, it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical protection scope of the present disclosure should be defined by the technical spirit of the appended claims.

Claims (11)

A track circuit device configured to check a state of a track on which a train runs based on at least one of a detection signal and a monitoring signal transmitted between a transmitter and a receiver, the track circuit device comprising:
The transmitter is
a detection signal generator configured to generate the detection signal based on two detection frequencies that differ from a center frequency by a first frequency; and
a monitoring signal generator configured to generate the monitoring signal based on two first monitoring frequencies that differ from the center frequency by a second frequency;
The receiver is
a detector configured to detect whether the track is occupied by the train based on the detection signal; and
and a monitor configured to check whether or not there is an abnormality in the line based on the monitoring signal,
and said second frequency is different from said first frequency. According to claim 1,
The center frequency, the detection frequency, and the first monitoring frequency track circuit device, characterized in that included in the audio frequency (Audio Frequency) band. According to claim 1,
The monitoring signal generator,
and generating the monitoring signal further based on a second monitoring frequency that differs from the center frequency by a third frequency. According to claim 1,
The first monitoring frequency and the detection frequency are included in an operating frequency range that is a frequency band in which the track circuit device operates normally. 5. The method of claim 4,
The monitor is
Track circuit device, characterized in that by searching all of the operating frequency range to check whether the line is abnormal. 6. The method of claim 5,
The receiver further comprises a monitor device configured to indicate whether the line is abnormal. A monitoring system comprising a plurality of track circuit devices configured to check a state of a track on which a train runs based on at least one of a detection signal and a monitoring signal transmitted between a transmitter and a receiver,
A first transmitter included in the first orbital circuit arrangement comprises:
a detection signal generator configured to generate a first detection signal based on two first detection frequencies that differ from a first center frequency by a first frequency; and
a monitoring signal generator configured to generate a first monitoring signal based on two first monitoring frequencies that differ from the first center frequency by a second frequency;
A first receiver included in the second orbital circuit arrangement comprises:
a detector configured to detect whether the track is occupied by the train based on the first detection signal; and
and a monitor configured to check whether or not there is an abnormality in the line based on the first monitoring signal,
and the second frequency is different from the first frequency. 8. The method of claim 7,
The monitoring signal generator,
and generating the monitoring signal further based on a second monitoring frequency that differs from the first center frequency by a third frequency. 8. The method of claim 7,
a detection signal generator of a second transmitter included in the second track circuit arrangement generates a second detection signal based on a second detection frequency that is different from a second center frequency by a fourth frequency;
the supervisory signal generator of the second transmitter comprises a supervisory signal generator configured to generate a second supervisory signal based on a third supervisory frequency that differs from the second center frequency by a fifth frequency;
and the second center frequency is different from the first center frequency. 10. The method of claim 9,
The monitoring signal generator,
and generating the monitoring signal further based on a fourth monitoring frequency that is different from the second center frequency by a sixth frequency. 8. The method of claim 7,
The first detection frequency and the first monitoring frequency are monitoring system, characterized in that included in the audible frequency (Audio Frequency) band in which the track circuit device normally operates.

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