JP2940658B2 - Track circuit short circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can be operated safely by short-circuiting a track circuit for track maintenance work or the like, setting the track circuit to a train "Yes" state, and turning a signal red. The present invention relates to a track circuit short circuit device.

[0002]

2. Description of the Related Art When a track circuit is short-circuited during track maintenance work or the like, the track circuit is short-circuited by a track circuit short-circuit device, and the track circuit current is used to determine whether the short-circuit has occurred. This is performed by a current comparison method for confirming that the ratio of the circuit current is equal to or more than a certain value.

[0003] This current comparison method is shown as follows.
You. Track circuit short circuit, as shown in FIG. 3, a set of Tanrakuko 3 for short-circuiting the rails 1, short-circuit line 4, the rail conductive rail current sensor 1 3 for measuring the rail current of about Tanrakuko
Composed of short body 2 with a built-in voltmeter 1 4 for measuring the induced voltage of the flow sensor 1 3. Two short-circuit state of the short-circuit body 2 and the ratio of the voltmeter 1 4 is equal to or larger than a predetermined value is determined to be normal.

[0004]

According to the current comparison method, the short-circuit state can be confirmed by the short-circuit device itself. However, two sets of current coils and voltmeters are required, and the circuit is complicated and the reliability is low.
There are disadvantages in that the battery is consumed greatly, and that the size of the short-circuit device is increased and the weight is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve such disadvantages, and it is possible to confirm with a short-circuit that a short-circuit is reliably short-circuited between rails. It is the purpose.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a rail is short-circuited with a short-circuit and a short-circuit line, a voltage terminal measures a rail-to-rail voltage close to the short-circuit, and a current sensor measures the current of the short-circuit line. The AC / DC converter converts voltage and current from AC to DC, the divider divides the current value from the voltage value to obtain the short-circuit resistance, and the display shows that the short-circuit is normal when the short-circuit resistance is below a certain value. If the short-circuit resistance obtained by dividing the rail-to-rail voltage and the short-circuit current at the time of short-circuiting is equal to or less than a certain value, it has a function of displaying a normal short-circuit. Furthermore, the short circuit between rails and the voltage terminal for measuring the voltage between rails are housed in one molded product,
In order to measure the rail-to-rail voltage and the short-circuit current, the switch switches the input and output of the AC / DC converter simultaneously according to the instruction of the switch controller. The switching controller controls the switching device, and the level holding circuit holds the DC level when the switching controller is selected. Also, since only one AC / DC converter for switching the voltage and current from AC to DC is sufficient, the circuit configuration is simplified.

[0007]

FIG. 1 is a block diagram showing an embodiment of the present invention. As shown in the figure, the short-circuit device short-circuits between the rails with a short-circuit 3 and a short-circuit line 4. Measure the rail-to-rail voltage and short-circuit current to ensure that the short-circuit has occurred, determine the short-circuit resistance at which the short-circuit is actually short-circuited, and indicate that short-circuiting is normal if the value is below a certain value. Do.

The rail-to-rail voltage is measured by bringing the voltage terminal 5 into contact with the rail, and the short-circuit current is measured by a current sensor 6 inserted in the short-circuit line 4. The voltage and current components are converted to DC by an AC / DC converter 7.

In the track circuit in the electrified section, the electric vehicle current also flows on the rail in a superimposed manner, so that the voltage / current component to be measured contains many noise components other than the signal component, and the short-circuit resistance cannot be measured accurately. The circuit 7 is provided with a bandpass filter for removing noise components other than signal components.

[0010] Voltage, enter each of the output current to a divider 8, obtains the short circuit resistance by dividing the voltage by the current.

The obtained short-circuit resistance is input to the display 9 , and when the short-circuit resistance is equal to or less than a predetermined value, a display of normal short-circuit is displayed.
When the short-circuit resistance is larger than the set value, a short-circuit failure is displayed or no display is made. In this way, when the rails are short-circuited by the track circuit short-circuit device, it is possible to determine whether or not the short-circuit is normal.

Since the short-circuit and the voltage terminal are independently connected to the rails of the track circuit, if the short-circuit between the rails due to the short-circuit is not normal and the contact resistance is large, the voltage between the rails is large, and Since the short-circuit current is measured to be small, the short-circuit resistance obtained by dividing the rail-to-rail voltage by the short-circuit current increases, so that a short-circuit failure can be detected.

[0013] By housing the short-circuiting element and the voltage terminal in one molded product, it is possible to simultaneously perform the short-circuiting between the rails and the mounting of the voltage terminal by a single short-circuiting operation, which facilitates handling and portability. It will be easier.

In the case of FIG. 1, the AC / DC converter 7 has a voltage,
Two components are required to measure the respective components of the current. However, as shown in FIG. 2, one component is switched by the switching controller 12 and the switching device 10 alternately and the DC value is retained by the level retaining device 11. It is possible to That is, the input and output of the AC / DC converter 7 are simultaneously switched by the switch under the control of the switching controller 12, and the voltage and the current are alternately selected. When the voltage is selected, the voltage component is converted from AC to DC, and the DC value is held in the voltage level holding circuit 11. When a current is selected, the current component is converted from an alternating current to a direct current, and the direct current value is held in the current level holding circuit 11.

If it is desired to short-circuit only a specific frequency when various signal currents are flowing in the track circuit, a resonator 15 composed of a coil and a capacitor is inserted between the short-circuit wires 4 as shown in FIG. .

[0016]

The train detection of the track circuit is determined so that the short-circuit resistance value can be reliably detected at 0.06Ω or less. Therefore, the track circuit that sets the short circuit display short-circuit display setting value to 0.06Ω is shorter than the train detection of the current comparison method based on the fact that the ratio of the track circuit current using the track circuit current is equal to or more than a certain value. The train detection by the apparatus according to the present invention can be directly confirmed. Furthermore, in the case of the device according to the present invention, the components of the device can be reduced in size, so that the device can be reduced in size and weight, and the effects of improving reliability, reducing battery consumption, and the like can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a track circuit short circuit device.

FIG. 2 is an explanatory diagram of a system in which two AC / DC converters are provided by a switching controller, a switching device, and a level holder;

FIG. 3 is an explanatory view of a conventional track circuit short circuit device.

FIG. 4 is an explanatory diagram when a resonator is inserted to short-circuit only a specific frequency.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rail 2 track circuit short circuit body 3 short circuit 4 short circuit wire 5 voltage measuring terminal 6 short circuit current sensor 7 AC / DC converter 8 divider 9 display 10 switch 11 level holding circuit 12 switching controller 13 rail current sensor 14 voltmeter 15 resonator

Claims (2)

(57) [Claims] 1. A short-circuit device of the track circuit for the short circuit short-circuit line and the short-circuit element between the rails, and a voltage terminal for measuring a rail voltage close to the short child, to measure the current of the short-circuit line A current sensor and output from the current sensor.
AC current to DC current, obtained from the voltage terminal.
AC / DC conversion to convert the current voltage to DC voltage
Vessels and a divider for obtaining the short-circuit resistance by dividing the DC current value from the DC voltage, the short circuit resistance is below a certain value
Track circuit short circuit, characterized by comprising a display unit for displaying the normal short circuit when. 2. The track circuit short-circuiter according to claim 1, wherein said short-circuiter and said voltage terminal are housed in one molded product.