JPH0730451Y2 - Track circuit abnormality monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a track circuit abnormality monitoring device, and more particularly to a track circuit abnormality monitoring device based on the voltage applied to a track relay.

<Prior Art> A track circuit in railway traffic controls a safety device such as a signal device via a track relay by short-circuiting the rails by a train axle using a rail as a part of an electric circuit. . That is, by dividing the track into appropriate sections, connecting a power source to one end of the rail of each section and connecting a track relay to the other end, and lifting or dropping the track relay when the train enters or leaves Then, various security devices are controlled based on this.

By the way, in such a track circuit, there are cases where it is difficult to perform stable operation because the circuit components change due to changes in weather conditions and the like. For this reason, the track circuit is provided with an abnormality monitoring device that monitors the voltage applied to the track relay from the rail side to the track relay side to monitor circuit abnormalities.

The abnormality detection operation of the conventional abnormality monitoring device will be described with reference to FIG. 9. When there is no train, that is, when the rail is in a non-short-circuited state and the track relay is moving up (the landing voltage is high), The lower limit value V ₁ of the voltage and the upper limit value V ₂ of the landing voltage when the train is present, that is, when the rail is short-circuited by the axle and the track relay is falling (low landing voltage) are set in advance. Set. Then, when the landing voltage during orbit relay lifting is the set value V ₁ or more and the landing voltage during falling is the set value V ₂ or less, it is determined to be normal, otherwise it is determined to be abnormal and an abnormal alarm is output. I'm trying to happen.

<Problems to be solved by the device> However, in the conventional detection method, the arrival voltage always enters the abnormality determination region (the region between V ₁ and V _{2 in the} figure) when the train enters or leaves the train. It was necessary to mask (not perform abnormality determination) to prevent the false alarm output. In the mask operation, when the track relay is dropped or lifted, the time is counted from the time when the landing voltage passes each of the set values V ₁ or V ₂ and the mask operation is released after a predetermined time t has elapsed. .

For this reason, an abnormal arrival voltage that occurs when an abnormal arrival voltage occurs and the arrival voltage returns to the normal range before the mask time elapses, and an intermittent phenomenon of track relay contacts that occurs when a train enters or leaves the train. There is a problem that (orientation) cannot be detected.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an abnormality monitoring device for a track circuit having a reliable and stable failure monitoring function.

<Means for Solving the Problems> Therefore, as shown in FIG. 1, the present invention uses a relay in a track circuit abnormality monitoring device for monitoring based on a relay voltage applied from the rail side to the track relay side. The lower limit value when the landing voltage is normal in the lifted state, the upper limit value when the landing voltage is normal in the relay drop state, and the locus in the lifted state that is located between the lower limit value and the upper limit value and decreases with the landing voltage. The drop voltage value at which the relay drops, and the lift voltage value that is also between the lower limit value and the upper limit value and that is higher than the drop voltage and that causes the orbital relay to drop when the landing voltage rises. While preset respectively, the arrival voltage detection means for detecting the arrival voltage of the track relay, the arrival voltage detection value detected by the arrival voltage detection means and the respective set lower limit values,
An upper limit value, a drop voltage value, and a lifting voltage value, and an arrival voltage comparison means, and a time when the arrival voltage detection value becomes lower than the lower limit value or the upper limit value based on the comparison result of the arrival voltage comparison means. The first to measure the time from the time when it became higher
Measuring means, and second measuring means for measuring time from the time when the landing voltage drops below the drop voltage value or the time when the landing voltage rises above the lifting voltage value based on the comparison result of the landing voltage comparison means. When the detection voltage value is maintained higher than the drop voltage value when the measurement time of the first measuring means reaches a preset predetermined time from the time when the arrival voltage becomes lower than the lower limit value, or When the measurement time of the first measuring means reaches a preset predetermined time from the time when it becomes higher than the upper limit value, it is judged as abnormal when the arrival voltage detection value is kept lower than the boosting voltage value. The first abnormality determining means for generating an alarm output, and the arrival voltage detection value is a rising voltage value from the time when the arrival voltage becomes equal to or lower than the drop voltage value until the measurement time of the second measuring means reaches a predetermined time set in advance. When it rises above When the detected voltage value drops below the drop voltage value from the time when the voltage becomes equal to or higher than the rising voltage value to the time when the measurement time of the second measuring means reaches a preset predetermined time, it is judged as abnormal and an alarm is output. The second abnormality determining means for occurrence is provided.

<Operation> In the above-mentioned configuration, when the landing voltage has a small change in the landing voltage and is in a steady state during the falling, the landing voltage is preset before the predetermined time elapses from the time when the landing voltage becomes abnormal during the landing. When the drop voltage value is maintained higher than the set drop voltage value, and during fall, the drop voltage is maintained lower than the preset drop voltage value until a predetermined time elapses from the time when the drop voltage becomes abnormal. At times, each is judged to be abnormal and an alarm output is generated.

On the other hand, when a train with a large change in landing voltage is entering or exiting, and when the train is approaching, when the train is approaching, the voltage above the drop-down voltage value will be exceeded until a predetermined time elapses after the arrival voltage drops below the drop voltage value. When the voltage rises, or when the landing voltage drops below the drop voltage value before a predetermined time elapses from the time when the landing voltage rises above the boost voltage value when the train is advancing, it is determined to be abnormal and an alarm output is generated.

As a result, unlike the conventional case, it is possible to constantly monitor the abnormal deposition voltage without setting the mask time.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2 showing the configuration of the present embodiment, the rails 1 and 2 of the track circuit are connected to the signal power source 3 at one end and to the track relay 4 at the other end. A control unit 6 including a microcomputer is connected to a cable 5 that connects the rails 1 and 2 and the track relay 4.
The control unit 6 has a rail from the signal power source 3
The analog value of the landing voltage of the orbit relay 4 applied to the orbit relay 4 via 1 and 2 is input and converted into a digital value.
Based on the A / D converter 7 and the voltage received via the A / D converter 7, an abnormality monitoring operation described later is performed to determine whether or not there is an abnormality in the track circuit, and when an abnormality is determined, for example, an LED 9 for displaying an abnormality is displayed. A CPU 8 for output is provided. Also, CP
U8 has a lower limit value V ₁ when the landing voltage is normal when the track relay 4 is in a lifted state, and an upper limit value V ₂ when the landing voltage is normal when the relay relay is in a dropped state (V ₁ and V ₂ are the same values as in the past). , The lower limit value V ₁
Between the lower limit value V ₁ and the upper limit value V ₂ and the drop voltage value V ₃ which falls between the upper limit value V ₂ and the upper limit value V ₂ due to the drop of the landing voltage. Positioning voltage higher than the drop voltage value V ₃ and the rising voltage value V ₄ (V ₃ and V ₄ are the standard values of the track relay to be used) which the falling orbit relay 4 lifts as the landing voltage rises, and A keyboard 10 for inputting the upper limit value V ₅ when the landing voltage is normal when the track relay 4 is in a raised state is input as a set value.

Here, the control unit 6 corresponds to the arrival voltage detecting means, the arrival voltage comparing means, the first measuring means, the second measuring means, the first abnormality determining means and the second abnormality determining means.

Next, the abnormality determination operation of the apparatus of this embodiment will be described with reference to the flowcharts of FIGS.

A feature of the present embodiment is that the change in the arrival voltage is small in the relay during rising and falling, and the abnormality determination in the steady state and the change in the arrival voltage during the transition into and out of the train is large. By making them different, it is possible to always perform the abnormality determination without setting the mask time (the period in which the abnormality determination is not performed) as in the related art.

That is, in the main routine of FIG. 3, in step (indicated by S in the drawing, and the same applies hereinafter) 1, the steady-state abnormality determination operation shown in the flowchart of FIG. 4 is executed.

In step 2, based on the landing voltage V read via the A / D converter 7, the transient state due to the entry or departure of the train, that is, the track relay 4 changes from the up state to the down state or from the down state to the up state. It is determined whether it has been done. here,
The landing voltage value of the orbital relay 4 is compared with the lifting voltage value V ₃ and V ≦
When it becomes V ₃ , or comparing the drop voltage V and the drop voltage value V ₄ , V
When ≧ V ₄ , it is determined to be in a transient state, and the process proceeds to step 3.

In step 3, the transient abnormality determination operation shown in the flowchart of FIG. 5 is executed.

In step 4, the time measurement is started at the same time when the transient abnormality determination operation is started.

In step 5, it is determined whether or not a preset predetermined time T ₁ , that is, the transient abnormality determination operation period has elapsed, and the transient abnormality determination operation is executed until the preset time T _{1 has} elapsed. In other words, when the transient abnormality determination operation period ends, the process returns to step 1 and the steady-state abnormality determination operation is performed again.

Next, the steady-state abnormality determination operation will be described with reference to the flowchart of FIG. 4 and the time chart of FIG.

First, in step 11, it is determined whether or not the detected voltage V is abnormal. This compares the landing voltage V with V ₁ and V ₅ respectively when the track relay 4 is in a lifted state, and judges that it is abnormal when V <V ₁ or V> V ₅ . Also, when it is in a falling state, it is determined to be abnormal when V> V ₂ . When the abnormality is determined, the process proceeds to step 12.

In step 12, the abnormality determination is made and the time measurement is started at the same time.

In step 13, it is determined whether or not the measurement time has been counted up to a preset predetermined time T ₂ . When it is counted, the process proceeds to step 14 and an abnormal alarm output is generated.
Also, when not counted until the predetermined time T ₂ ends without generating an alarm output.

That is, when the arrival voltage V is maintained higher than the drop voltage value V ₃ when a predetermined time T _{2 has} elapsed since the arrival voltage V became abnormal, it is determined that the voltage does not decrease due to train entry and is abnormal. . Further, when the landing voltage V becomes the drop voltage value V ₃ or less before the predetermined time T _{2 has} elapsed from the time when the landing voltage V becomes abnormal, the measured value is reset, and it is assumed that there is a voltage drop accompanying the train entry, The system does not generate an abnormality alarm output and shifts to the abnormality determination operation during transition.

Next, the transient abnormality determination operation will be described with reference to the flowchart of FIG. 5 and the time charts of FIGS. 7 and 8.

First, in step 21, it is determined whether or not the detected voltage V is abnormal. This is because when the landing voltage V becomes equal to or lower than the drop voltage value V ₃ and the track relay 4 changes from the lifted state to the dropped state (see FIG. 7), the landing voltage V and the landing voltage V rise by a predetermined time T _1. It is compared with the upper voltage value V _4, and when V ≧ V ₄ , it is determined to be abnormal. Further, when the landing voltage V becomes equal to or higher than the lifting voltage value V ₄ and the track relay 4 changes from the falling state to the lifting state (see FIG. 8), the landing voltage V reaches the predetermined time T _1.
And the drop voltage value V ₃ are compared, and when V ≦ V ₃ , it is determined to be abnormal. When it is in the falling state, it is judged to be abnormal when V> V ₂ . Then, when an abnormality is determined, the process proceeds to step 22, and unlike the steady-state abnormality determination operation, an alarm output is immediately generated without measuring time.

With the above configuration, since it is possible to constantly monitor the abnormality of the arrival voltage, it becomes possible to perform the abnormality determination even when the arrival voltage changes due to the entrance and departure of the train, which could not be conventionally determined by the mask. It is possible to detect a temporary abnormal voltage. Therefore, the abnormality monitoring performance of the track circuit can be improved.

Further, in the present embodiment, in the abnormality determination during raising, since the upper limit value of the normal wearing voltage, which has not been set conventionally, is provided, it is possible to detect an abnormality in which the wearing voltage becomes abnormally high, and the reliability of the abnormality monitoring can be improved. The property is improved.

<Advantages of Device> As described above, according to the present invention, it is possible to constantly perform anomaly monitoring without providing a mask period in which anomaly monitoring is not performed as in the prior art, so that the reliability of anomaly monitoring is significantly improved. it can. This makes it possible to reduce the burden of maintenance and inspection work on the track circuit.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining the configuration of the present invention, FIG. 2 is a configuration diagram showing an embodiment of the present invention, and FIGS. 3 to 5 are control flowcharts of abnormality monitoring operation of the above embodiment, and FIG. Figure ~
FIG. 8 is a time chart for explaining the abnormality monitoring operation of the above embodiment, and FIG. 9 is a time chart for explaining the abnormality monitoring operation of the conventional example. 1,2 …… Rail, 3 …… Signal power supply, 4 …… Orbital relay,
6 ... Control unit, 7 ... A / D converter,
8 ... CPU, 9 ... LED, 10 ... Keyboard

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Koichi Orihara 1-13-8 Kamikizaki, Urawa-shi, Saitama Nihon Signal Co., Ltd. Yono factory (72) Kenji Nakata 1-1-13 Kamikizaki, Urawa-shi, Saitama No. 8 Japan Signal Co., Ltd. in the Yono factory (56) References Japanese Patent Laid-Open No. 6242/1978 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A rail is provided with a power source on one end side and a track relay on the other end side, and the rail is short-circuited between the rails at the axle when a train enters, so that the track relay is dropped from a lifted state to a train. In the track circuit abnormality monitoring device that monitors the presence or absence of abnormality in the track circuit configured to detect based on the relay landing voltage applied from the rail side to the track relay side, the lower limit when the landing voltage is normal in the relay lifting state Value, and the upper limit value when the incoming voltage is normal in the relay drop state,
A drop voltage value which is located between the lower limit value and the upper limit value and which causes the orbital relay in the suspended state to drop with a decrease in the landing voltage, and which is also located between the lower limit value and the upper limit value and which is the drop voltage. Higher than the value, and the rising voltage value that the orbital relay in the falling state lifts as the landing voltage rises
A landing voltage detection means for detecting the landing voltage of the track relay,
Of the arrival voltage comparison means for comparing the arrival voltage detection value detected by the arrival voltage detection means with the respective set lower limit value, upper limit value, drop voltage value and lifting voltage value; Based on the comparison result, first measuring means for measuring time from the time when the detected value of the arrival voltage becomes lower than the lower limit value or becomes higher than the upper limit value, respectively, and the arrival voltage based on the comparison result of the arrival voltage comparison means. From the time when the landing voltage drops below the lower limit value or the time when the landing voltage rises above the lifting voltage value, and the first measuring means from the time when the landing voltage falls below the lower limit value. The measuring time of the first measuring means from when the detected voltage value is kept higher than the drop voltage value when the measured time of the measuring means reaches a preset predetermined time or when it becomes higher than the upper limit value. Is set in advance When a predetermined time has passed, the first abnormality determining means for determining an abnormality and generating an alarm output when the arrival voltage detection value is maintained in a state lower than the lifting voltage value, and the arrival voltage is equal to or lower than the falling voltage value. From the time when the arrival voltage becomes higher than the up voltage value or the time when the arrival voltage becomes higher than the up voltage value before the measurement time of the second measuring means reaches the preset predetermined time. A second abnormality determining means for determining an abnormality and generating an alarm output when the arrival voltage detection value falls below the drop voltage value before the measurement time of the second measuring means reaches a preset predetermined time. A track circuit abnormality monitoring device characterized in that