JP2011000989A - Train detecting device of volt-ampere power receiving type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a train detecting device of a conventional volt-ampere power receiving type can not detect a failure when each electric receiving part breaks down respectively under the condition that the device continues to be used with the voltage receiving part or the current receiving part out of order resulting in significant degradation of the train detecting performance of the device.SOLUTION: The voltage receiving part 6 consists of an electric cable 1 and an instrument 3, and the current receiving part 7 consists of an electric cable 2, an instrument 4 and a detecting coil 5. In a non-insulated track circuit which includes: a voltage receiving end for receiving a voltage component V of a train detection signal transmitted from a transmitter 10 for transmitting the train detection signal, and a current receiving end for receiving its current component I, the transmission from a receiver 8 and a receiver 9 to an operation part 11 is performed without combining V and I. In the operation part 11, the train is determined to be on-rail when V+KI is larger than an activation decision threshold, wherein V+KI is calculated by adding V to KI which is I multiplied by a coefficient K. and the train is determined to be not on-rail when V+KI is smaller than a deactivation decision threshold. Failure decision is performed concerning each electric receiving part only when the track circuit is determined to be activated in a train detecting process.

Description

  The present invention relates to a train detection device for detecting a cable disconnection / fault of a cable / equipment from a voltage receiving end to a receiver or a cable / equipment from a current receiving end to a receiver in a voltage / current receiving type train detection device. It relates to the device.

  In a non-insulated track circuit, the train axle of the train enters the track circuit between the transmitting end that transmits the train detection signal and the receiving end that receives the train detection signal via the track circuit in the voltage receiving type train detection device. Even if it is not, it may be determined that the train is present. This is because the voltage received at the receiving end decreases when the rail is short-circuited outside the transmitting end or the receiving end of the track circuit.

  Therefore, a receiving end that receives the current component of the train detection signal is installed near the receiving end that receives the train detection signal, and the combined value of the voltage component and the current component is used for train detection to improve the train detection performance. There is a train detection device. When the train is far from the track circuit to be detected by the train, the voltage component is dominant in the combined value of the voltage component and the current component, and the combined value becomes a sufficiently large value, so that a train absence line can be detected. When the train approaches the receiving end, the current component becomes dominant. Since the current component has a better response to the short circuit of the track circuit than the voltage component, even in the non-insulated track circuit that is not electrically insulated, the train detection performance can be improved from the voltage receiving type train detection device.

  However, the track circuit is affected by the weather and the electrical characteristics change. When the presence line determination threshold value is determined so that the train presence line is not erroneously detected when the attenuation of the train detection signal is maximum, only the voltage component or only the current component may be larger than the presence line determination threshold value. Therefore, when the voltage power receiving unit or the current power receiving unit fails, the track circuit does not drop and a failure is latent.

JP 2000-95108 A

  In the conventional technology, when the attenuation of the train detection signal is maximum, when only the voltage component or only the current component is larger than the standing line determination threshold, when the voltage power receiving unit or the current power receiving unit fails, the track circuit is There is a potential failure because it does not fall. If the operation continues with either power receiving unit broken, the train detection performance of the device will be significantly reduced. Therefore, it is necessary to enable failure detection of the voltage power reception unit or current power reception unit, but the conventional voltage / current power reception type train detection device uses a combined transformer near the track circuit for the voltage component and current component. Since they are combined, a failure of the voltage power receiving unit or the current power receiving unit cannot be detected.

  The present invention is characterized in that a voltage component and a current component are received by a receiver without being combined and transmitted to a calculation unit in order to enable failure detection of the voltage receiver and the current receiver.

The train detection device of the present invention has a transmission end for transmitting a train detection signal, a reception end for receiving a voltage component of the train detection signal, and a reception end for receiving a current component of the train detection signal. In an insulated track circuit, a transmitter connected to an electric cable connected to the transmitting end, a receiver connected to an electric cable connected to a receiving end for receiving the voltage component, and a current component for receiving the current component Using a receiver connected to an electric cable connected to the receiving end,
A voltage component value and a current component value of the train detection signal transmitted from the transmitter are captured by the receiver, and a fluctuation in the voltage component value and the current component value is monitored in a calculation unit connected to the receiver. Then, the voltage receiving unit that is a cable / equipment connected from the voltage receiving end to the receiver or the cable disconnection of the current receiving unit that is a cable / equipment connected from the current receiving end to the receiver It is provided with a function of detecting a device failure.

  In addition, the train detection device of the present invention includes a mechanism for displaying a failure detection result of the voltage power reception unit and the current power reception unit.

  According to the present invention, it is possible to detect the failure of the voltage power reception unit or the current power reception unit, thereby preventing the potential of failure.

FIG. 1 is a diagram showing a device configuration of Example 1 in a voltage / current receiving type train detection device according to the present invention. FIG. 2 is a diagram illustrating a reception level when the voltage / current receiving failure of the first embodiment occurs in the voltage / current receiving type train detection apparatus according to the present invention. FIG. 3 is a flowchart showing the flow of the failure detection process of the first embodiment in the voltage / current power receiving type train detection apparatus according to the present invention. FIG. 4 is a diagram showing an example of alarm output of the first embodiment in the voltage / current receiving type train detection apparatus according to the present invention. FIG. 5 is a diagram illustrating a hardware configuration of the transmitter and the receiver according to the first embodiment in the voltage / current receiving type train detection apparatus according to the present invention. FIG. 6 is a block diagram showing the processing of the calculation unit of the first embodiment in the voltage / current power receiving type train detection apparatus according to the present invention.

  Since the train detection apparatus of the present invention combines the current component and the voltage component in the calculation unit, the calculation unit having the failure detection logic can individually monitor the fluctuation of each component and can detect individual failures, thereby Operation in a state where detection performance is degraded can be suppressed. Embodiments of the present invention will be described below with reference to the drawings.

  A first embodiment of the present invention for achieving the above object will be described with reference to FIG. FIG. 1 is a configuration diagram of a track circuit and a train detection device of the present invention. The electric cable 1 is connected to the voltage receiving end and the receiver 8, and the electric cable 2 is connected to the current receiving end and the receiver 9. The device 3 exists from the voltage receiving end to the receiver 8, and the device 4 exists from the current receiving end to the receiver 9. In the first embodiment, the detection coil 5 is used as a current receiving end. The voltage receiving unit 6 includes an electric cable 1 and a device 3. The current receiving unit 7 includes an electric cable 2, a device 4, and a detection coil 5. The transmitter 10 is a transmitter that transmits a train detection signal.

  From the non-insulated track circuit having the voltage receiving end for receiving the voltage component of the train detection signal and the current receiving end for receiving the current component, the receiver 8 and the receiver 9 are connected to the voltage component without synthesizing the voltage component and the current component. The value V and the current component value I are transmitted to the calculation unit 11 respectively. Since the voltage component value V and the current component value I are combined by the calculation unit 11, the calculation unit 11 can individually monitor fluctuations of each component, and individually detect the failure of the voltage power reception unit and the current power reception unit. It can be done.

  When the value of V + KI (hereinafter referred to as the summation level) obtained by adding the value KI obtained by multiplying the current component value I by the coefficient K and the voltage component value V is greater than the uplift determination threshold, When the value is smaller than the determination threshold, the train is not present. In the non-insulated track circuit, the leakage conductance varies depending on the wetness and dryness of the track circuit due to weather changes.

  The track circuit calculates a drop determination threshold and a lifting determination threshold based on the addition level at the time of drying so that the train can be detected even when the leakage conductance becomes maximum. This is called track circuit adjustment. At the same time as the track circuit adjustment, the failure determination threshold value of the current power receiving unit is set based on the failure determination threshold value of the voltage power receiving unit based on the voltage component value V and the value KI obtained by multiplying the current component value I by the coefficient K.

  The failure determination threshold value is calculated as follows in order to avoid erroneous detection due to a decrease in V and KI accompanying train approach. The train enters the track circuit boundary when the leakage conductance obtained from the simulation result or the measurement result is the minimum, the maximum value of V and KI, and the leakage conductance obtained from the simulation result or the measurement result is the maximum. The level obtained by subtracting the difference between the minimum values of V and KI immediately after the adjustment from V and KI at the time of track circuit adjustment is set as a failure determination threshold.

  FIG. 2 is a diagram illustrating a reception level when the voltage / current receiving failure of the first embodiment occurs in the voltage / current receiving type train detection apparatus according to the present invention. FIG. 2 illustrates a state in which the track circuit cannot be determined to fall in the case of a voltage receiving failure or a current receiving failure. FIG. 2 is a diagram showing the relationship between the train position and the reception level with respect to the track circuit XT. When the train is on the line XT, the addition level 21 becomes smaller than the drop determination threshold value, and the calculation unit 11 determines the drop of the track circuit XT. When the train advances the track circuit XT, the addition level 21 becomes larger than the lifting determination threshold value, and the calculation unit 11 determines the absence of the track circuit XT. The addition level 21 is calculated by adding the V level 23 and the KI level 24 together. Both V level 23 and KI level 24 indicate reception levels when the cable / device is normal.

  The V level 25 indicates the V level at the time of voltage reception failure. When a voltage receiving failure occurs, the V level 23 decreases to the V level 25, and the addition level 21 decreases to the addition level 22. However, even if the V level 25 becomes 0, the addition level 22 does not fall below the drop determination threshold. Therefore, the calculating part 11 cannot determine track circuit fall.

  FIG. 3 is a flowchart showing logic for detecting a failure of the voltage power reception unit and a failure of the current power reception unit. When the train is in the track circuit, V is smaller than the failure determination threshold value of the voltage power receiving unit, and KI is smaller than the failure determination threshold value of the current power receiving unit. For this reason, the failure detection of each power receiving unit is performed only when the train detection processing in step S1 based on the summing level determines that the track circuit is in the saddle state in step S2. At this time, the failure determination time of each power reception unit is made longer than the drop determination time in order to prevent determination of a power reception unit failure in the train line.

  When it is determined in step S3 that the voltage component value V is equal to or less than the voltage power receiving unit failure determination threshold value, the calculation unit 11 instructs the display unit 12 to display the voltage power receiving unit failure in step S4. When it is determined in step S5 that KI is equal to or less than the current power reception unit failure determination threshold value, in S6, the calculation unit 11 instructs the display unit 12 to display a current power reception unit failure.

  FIG. 4 is a diagram showing an example of alarm output of the first embodiment in the voltage / current receiving type train detection apparatus according to the present invention. The display unit 12 displays an alarm as shown in FIG.

  FIG. 5 shows a hardware configuration of the transmitter 10 and the receiver 8 or the receiver 9 used in the first embodiment of the voltage / current receiving type train detection apparatus according to the present invention. The calculation unit 11 is connected to the CPU 31 of the receiver and transmits a transmission instruction. The CPU 31 is connected to the DSP 32 and instructs the DSP 32 to transmit a train detection signal based on a transmission instruction from the calculation unit 11. The DSP 32 transmits a train detection signal to the D / A converter 33 of the transmitter.

  The train detection signal is amplified by the amplifier 34, the frequency band other than the train detection signal is cut by the BPF 35, and transmitted to the track circuit side field device. The train detection signal returned to the track circuit side device via the track circuit is cut in the frequency band other than the train detection signal by the BPF 36, converted into a digital signal by the A / D converter 37, and received by the DSP 32. The train detection signal received by the DSP 32 is received by the calculation unit 11 via the CPU unit.

  FIG. 6 is a block diagram showing the processing of the calculation unit 11. The train detection signal is received and processed by the train detection signal input unit 41, and the voltage level and current level are stored in the voltage / current level storage unit 42. The voltage / current power reception failure detection unit 43 refers to the track circuit state from the track circuit state storage unit 44, and when the track circuit is in a saddle state, the voltage / current reception failure unit 43 refers to the voltage / current level from the voltage / current level storage unit 42. Execute failure detection processing. When a failure is detected, the alarm output unit 45 is instructed to output an alarm for a voltage / current power reception failure.

  The present invention can individually detect a failure in an apparatus having two pairs of receiving ends in a track circuit.

DESCRIPTION OF SYMBOLS 1 Electric cable 2 Electric cable 3 Equipment 4 Equipment 5 Detection coil 6 Voltage receiving part 7 Current receiving part 8 Receiver 9 Receiver 10 Transmitter 11 Calculation part 12 Display part 21 Addition level 22 Addition level 23 V level 24 KI level 25 V level 31 CPU
32 DSP
33 D / A
34 AMP
35 BPF
36 BPF
37 A / D

Claims (2)

In the non-insulated track circuit in which the transmission end for transmitting the train detection signal, the reception end for receiving the voltage component of the train detection signal, and the reception end for receiving the current component of the train detection signal are installed.
A transmitter connected to the electrical cable connected to the transmission end, a receiver connected to an electrical cable connected to the reception end for receiving the voltage component, and a reception end connected to receive the current component Using a receiver connected with an electric cable,
The voltage component value and current component value of the train detection signal transmitted from the transmitter are captured by the receiver,
In the arithmetic unit connected to the receiver, the voltage component value and the current component value are monitored for fluctuation, and the voltage power receiving unit which is a cable / equipment connected from the voltage receiving end to the receiver, or the A train detection device having a function of detecting a cable disconnection or a device failure in a current power receiving unit which is a cable / device connected from a current receiving end to a receiver. In the train detection device according to claim 1,
A train detection apparatus comprising a mechanism for displaying a failure detection result of the voltage power reception unit and the current power reception unit.

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