JPS5975860A - Short circuit sensitivity and short-circuit current measuri-ng device for track circuit in railway signal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for transmitting control commands for measurement items and transmitting measurement values when measuring short-circuit sensitivity and short-circuit current at the receiving end of a track circuit of an automatic train control device (hereinafter referred to as ATC) for railway signals. This relates to a device for measuring short-circuit sensitivity and short-circuit current of track circuits, allowing operations such as displays to be carried out centrally within the signaling equipment room by remote control.

A track circuit uses rails as part of an electric circuit to configure a circuit, and by short-circuiting the rails by the axle of the train, the railway signal safety device can be directly or indirectly controlled - but not yet locked. This is an electric circuit for train detection, and its principle is as follows. That is, in FIG. 1, the track 1 is divided into appropriate sections, and the rails 2 at both ends of the specified section A are
electrically insulate the rails 2' of other adjacent sections with an insulator 3, connect each rail joint in the middle of each divided section A with an electrical IC 4, and connect both rails within the section. 2゜2
An electric circuit is constructed by wiring a VC power supply 5 at one end and a track relay 6 at the other end. Now, when there is no train on the track in a specific section, the track relay 6 installed at the receiving end receives sufficient excitation current from the power source 5 installed at the power transmitting end, and is operated, but the V inside the track (The train is still a vehicle.
When r approaches, the track circuit is short-circuited by the train or the axle S of the vehicle, and the track relay 6 loses excitation and falls. Therefore, the energized contact 6a of the track relay 6 turns on the spherical light (G) of the traffic light 7, and the non-excited contact 6b turns on the red light (R).
By displaying this, the display of the signal lamp of the signal 7 can be automatically controlled by the train or the like. The principle is exactly the same in the case of the ATC track circuit. That is, A.T.C.
In the case of a track circuit, as shown in item 2, a sending end geodetic device 8 and a receiving end geodetic device 9 are installed at the power sending end and receiving end of the track constituting each track circuit in place of the power supply and relay, respectively. Both devices 8,
9 is connected to a large number of track circuit transmitters and a track circuit receiver group 11 which are centrally installed in a signal equipment room 10 via signal cables. According to the A 'l' C track circuit, a train entering the track circuit of a specific section is detected by the track circuit receiver, and a train in the signal equipment room 10 is sent to the track circuit located behind the track circuit. A control signal is transmitted from the track circuit transmitter to the onboard device 7 (not shown) of the following train that has entered the track circuit to the rail 2 of the track circuit.
The train's commanded speed information is conveyed through '. On the other hand, on the train, this instructed speed is compared with the train speed It, and if the train speed is higher than the instructed speed, the VC automatically applies the brakes and automatically controls the train to a safe speed. It has become.

By the way, in order to judge whether the track circuit is functioning properly or not, it is necessary to conduct short-circuit current inspection to check the short-circuit sensitivity and the function of transmitting information to the train. Short-circuit sensitivity is expressed as the maximum short-circuit resistance value when the receiving relay of the track circuit receiver falls when the rails are short-circuited with a resistor at the feeding end of the track circuit. Current 1. It is expressed as the current value when the rails are short-circuited with a low resistance equal to the axle.

Conventionally, the method of measuring the short-circuit sensitivity and short-circuit current of a track circuit is to use an ammeter and a variable resistor, connect these in parallel between the rails at the receiving end of the track circuit, and change the resistance value of the variable resistor. Therefore, measurements were carried out on site. In the case of ATC, all functions such as train detection and information transmission are concentrated in the signal equipment room 10, so it is not possible to check the operating status of the receiving relay at the measurement site. Conventionally, several people were placed at the measurement site and in the signal equipment room, and while making phone calls, they were able to check the output level of the track circuit transmitter centrally installed in the signal equipment room and the track circuit receiver. We adjusted the input level and the short-circuit resistance value of the track circuit on-site, and through communication and collaboration between the site and the signal equipment room by telephone etc., we determined the short-circuit resistance value when the receiving relay was dropped and the short-circuit when the rail was short-circuited. It is necessary to measure current values, etc., which not only requires a large number of workers, but also requires extremely troublesome and time-consuming work to ensure the accuracy of the measurements. The functional quality of track circuits has a great deal to do with train operation safety, so inspecting them is an extremely delicate task.

The present invention solves the above problems and is composed of a first unit installed in a traffic light room and a portable second unit installed at the measurement site. Incorporating short circuit current detection and control functions, short circuit resistance and short circuit current specification operations in the first unit, and information signal display functions from the second unit. A measuring device that enables the transmission of control signals and information signals between both units, enables centralized monitoring within the signaling equipment room, ensures accuracy in measurement, and greatly improves droplet production efficiency. This is what we provide.

Hereinafter, a practical example of the present invention will be explained with reference to the drawings.

Figure 3 shows the first unit 1 installed in the signal/protection room 10.
This shows the configuration of No. 2. That is, the first unit 1
2 is a short-circuit resistance switching control operation unit 16 by a switching operation;
, the short-circuit current value display section 14 transmits a control signal set on the operation section 16, receives an information signal emitted from the second unit 15 (described later) in response to the control signal, and displays this on the display section 14. It has a built-in transmitter/receiver unit 16 that transmits information to the user.

The switching control operation unit 13 is a resistance value changeover switch, and in the embodiment, the switch P1 is "open" (resistance value 6c).
and a switch P with a “short circuit” resistance value (0Ω).

and switches P8 to P□ that change the resistance value stepwise within the resistance value range of 01Ω to 15Ω, all of which also serve as a display section using self-illuminated push button switches. When this pushbutton switch is operated, a control signal for a specified resistance value is issued, and at the same time, the pushbutton lights up intermittently, and then receives an information signal sent from the second unit and is controlled to the specified resistance value. is displayed continuously, but
The structure of the operating section 13 is not limited to the above, and any structure may be used as long as it can transmit and display a resistance value control signal. The display unit 14 includes a display surface that digitally displays the short-circuit current value of the track circuit transmitted from the second units 1 and 5 in response to the control signal transmitted when the switch P from the operation unit 16 is operated. There is.

The transceiver section 16 consists of a transmitting circuit, a receiving circuit, and a control logic section that mutually converts input and output into logical signals, but since the circuit can use a conventionally known circuit, the specific configuration will be described below. The explanation will be omitted. 17 is a power source. The transceiver section 16 is housed in the case of the first unit 12, the operation section 13 and the display section 14 are installed on a panel provided in the case, and the external input/output terminal 18 of the transceiver section 16 is installed.
Connect to the empty line 19 of the signal cable.

FIG. 4 shows the configuration of the second unit 15. The second unit 15 includes a resistance element group 20 and a switching relay 21 for measuring the short-circuit resistance value and short-circuit current value of the track circuit.
A variable resistor 22 consisting of a variable resistor 22 and a control signal emitted from a transmitter/receiver section 16 in the first unit 12 are received, and based on the control signal, switching control of the switching relay 21 is performed, and the combination of the resistance element group 20 is controlled. A transmitter section 23 and a battery power source 24 are provided to set the resistance value between the terminals of the variable resistor 22 and to transmit a display signal of the short-circuit resistance value or short-circuit current value of the track circuit.

Figure 5 shows the contact points between the resistance element group 20 and the switching relay 21.
An example of a combination with d6 is shown. In the embodiment shown in FIG. 5, a resistor element R8-0 with different resistance values is connected in series between the terminals.
0980,R,=0.10. R2=0.20. ,R,=
04Ω; R4=0.8Ω at contact d1. of switching l/-21 which operates in response to a control signal. Easy q, A, d4
,very easy. With this configuration, each of the nine resistance elements is selectively combined by opening the terminals 22a of the variable resistor 220 to obtain a desired resistance value.

It is designed to be obtained between 22b and 22b. In the case of the embodiment, the resistance value o, , o, i is set to ~15Ω.

The transceiver section 23 includes a transmitting circuit, a receiving circuit, and a converting circuit 25 that converts an analog signal of a short circuit current value into a digital signal.
A, and a logic circuit that mutually converts input and output into logic signals. A variable resistor 22 including these resistance element group 20 and switching relay 21, and a transmitter/receiver section 23'
is housed in the second unit 150 case 25, the conductor 27 of the rail adhesive 26 is connected to both terminals 22a and 22b of the variable resistor 22, and both rail adhesives 26 and 26 are connected to the rail 29 at the power receiving end of the track circuit. .2, connect the connecting cable 29 to the external terminal 28 of the transceiver section 23, and connect this to the empty line 19 of the signal cable to which the transceiver section 16 of the first unit 12 is connected. The second unit 15 further includes a terminal 30 for detecting the power receiving end of the track circuit connected to the transmitter/receiver section 23. This terminal 6
0, the wiring 32 of the induction coil 31 attached to one of the rail bonding devices 26 shown in FIG. 4 is connected.

As shown in Fig. 2, the first unit 12 installed in the signal equipment room is connected to the empty line 19 of the signal cable, and the
The second unit 15 installed at the fixed site is connected to the empty line 19.
Connect to each terminal 17 and rail gluer 26
．． 26 is placed in close contact with the tread surface of the rail 2 on the power receiving end side of the track circuit and set at the measurement site.

The second unit 15 is installed and set manually. In this state, first install the rail gluer 26.26! Use the following procedure to check whether it is set on the rail at the receiving end of the circuit.

■Confirming the power receiving end In Figures 3 to 5, the first unit 12 and the second unit 15 are connected to the empty line 19 of the signal cable.
When the rail adhesives 26, 26 are brought into close contact with the rail 2, an induced voltage proportional to the value of the signal current flowing through the rail is generated in the induction coil 31 for power receiving end detection attached to one of the rail adhesives 26.

On the other hand, "open" and "short-circuit" control signals corresponding to when the first unit 12 handles the switches P, . be done. The control signal is transmitted to the second unit 1.
5, the "open" control signal opens all the contact points d - d of the switching relay 21, and the "short circuit" control signal closes only the contact d6 to short-circuit both terminals 22a and 22b. do. All connections, care, ~easy. The induction coil voltage Vo when the terminals 22a are opened and the voltage Vo when only the contact i5 is closed.
, 22b is short-circuited and the induction coil voltage Vs is measured, and this information signal is transmitted to the first unit 12 side.

In the first unit 12, this Vo and Vs information is automatically processed in the logic section, and only when Vo:>Vs, the first unit 12
The power receiving end confirmation indicator light 65 of the unit 12 lights up, and from now on, control signals can be transmitted by operating the operation buttons.

In addition, in the embodiment, the functions of transmitting and receiving control and information signals,
Indicator lights 33 to 36 are provided for batch IJ check of the second unit, power receiving end confirmation, and overcurrent detection of short circuit current, and each indicator light 35 to 5B lights up when all conditions are normal.+c The function indicator light 37 is then turned on, and the first unit 12 is configured to be able to transmit a control signal. The functions described in ``2'' may be added to the first unit as necessary, except for the function of confirming the receiving end, but it is an essential requirement of the present invention to have the function of confirming the receiving end.

When the rail adhesives 26 and 26 of the second unit 15 are set at the power transmitting end side of the track circuit, VO<VS, and the power receiving end confirmation indicator light 35 does not light up. in this case,
Until the rail adhesive 26 and 26 of the second chaotic 15 are correctly installed on the receiving end side, control signals such as "1 open" and "1 short circuit" are repeatedly sent from the first unit 12, and control signals from the operation buttons are It is logically locked and cannot be sent.

Confirm that the second unit 1-15 is installed directly on the power receiving end side of the track circuit (-) and then perform the following measurements.
It can be done within.

1 ■ Measurement of short circuit current Operate the "short circuit" push button P9 on the operation unit 13.

The switching relay 21 is controlled by the control signal from this operation, contacts a1 to d and d6 are opened and d6 is closed, and both terminals 22a and 22b of the variable resistor 22 are short-circuited by the resistance O. A short circuit current is detected in the circuit. This short-circuit current information signal is transmitted to the first unit 12 of the signal equipment room 10 and displayed in numerical value on the display section 14 thereof.

■O, i~1.50 push buttons P8~ provided in the short circuit sensitivity measurement operation section 13~
By operating P1v, a control signal for the short circuit resistance value is transmitted, and a combination of resistance elements is selected by controlling the switching relay 21.
Shorts the track circuit at the specified resistance value.

The short circuit resistance value at that time is displayed on the pushbutton switches P3 to PIJ which also serve as a display section. On the other hand, the operating state of a receiving relay (all not shown) built into the track circuit receiver is monitored. This operating state 1d is displayed on a panel in the signal equipment room 10 (not shown). Due to a short circuit between the rails 2 and 2, the receiving relay becomes de-energized below the resistance value of the track receiver, and a falling contact is formed. Short-circuit sensitivity is detected by reading the maximum short-circuit resistance value when the falling contact of this receiving relay is configured.

The present invention consists of a first unit equipped with a control operation function and a display function, and a second unit equipped with a controlled function, as described in (2) below. In order to send a control signal to the second unit installed at the site and display the resulting measurement take back to the first unit, the second unit is manually installed at the measurement site. Just set it,
The measurement work can be carried out centrally in the signal equipment room, eliminating the need for joint work between the signal equipment room and the field, which was the case in the past, and eliminating the need for mutual communication, errors in instructions, and errors in the second unit set. There are no measurement errors due to errors, and there is no need for measurement personnel or liaison personnel at the site, so the number of working personnel can be reduced. Moreover, according to the present invention, the second unit only needs to be equipped with the controlled function, which makes it possible to reduce the size and weight, and because it is configured in a simple box shape with only connection terminals, it is extremely easy to handle in the field. It can be done easily.

The present invention has the effect of making it possible to efficiently measure the short-circuit sensitivity and short-circuit current of each track circuit with a small number of people without requiring any special equipment by utilizing the empty line of the signal cable.

[Brief explanation of drawings]

Fig. 1 is a diagram of the principle of the track circuit, Fig. 2 is an explanatory diagram of the ATC track circuit, Figs. 3 to 5 show an embodiment of the device of the present invention, and Fig. 3 is a block diagram of the first unit. 4 are block diagrams of the second unit, and FIG. 5 is a circuit diagram showing an example of a variable resistor. 2...Rail 8...Power transmission end side ground equipment 9
...Power receiving end side ground equipment 10...Signal equipment room 12...
First unit 13... - Operation section 14... Display section 15... Second unit 16... Transmitter/receiver section 19 of the first unit... Empty line of signal cable 20... Resistance element group 20...・Switching relay 22
... Variable resistor 23 ... Transmitter/receiver section of second unit 26 ... Rail adhesive -27 Conductor 28 ... External terminal 31 ... Induction coil patent applicant Japanese National Railways Figure 1

Claims (1)

[Claims] (1) A first unit installed in the signal room and a second unit installed near the track circuit power receiving 1M at the measurement site.
The first unit includes an operation section for specifying the short-circuit resistance value of the track circuit, a display section for displaying the short-circuit resistance value and short-circuit current value of the track circuit, and a control signal for the short-circuit resistance value specified in the operation section. A transmitter/receiver section is provided, which receives an information signal emitted as an operation response from the second unit in response to the control signal, and transmits the information signal to the display section. A variable resistor consisting of a group of resistance elements and a switching relay for the elements connects to the empty line of the signal cable laid between the equipment room and the field equipment box, and connects the track circuit to the second unit. The control signal emitted from the transmitter/receiver section of the variable resistor is received, and the resistance value between both terminals of the variable resistor is set to a predetermined value by the operation of the switching relay based on the control signal. A connection cable that has a built-in transceiver section that transmits an information signal of the short-circuit resistance value or the short-circuit current value of the track circuit flowing to the variable resistor, and connects the external terminal of the transceiver section of the second unit to the empty line of the signal cable. Connect the conductors of the rail gluer, which are closely connected to the treads of a pair of rails, to both terminals of the variable resistor, and then connect the wires of the rail gluer to both terminals of the variable resistor. The rail bonding device is characterized in that an induction coil is installed in the rail bonding machine, which measures an induced voltage proportional to the flowing signal flow and outputs an information signal indicating whether or not a second unit is installed at the receiving end of the track circuit. A device for measuring short-circuit sensitivity and short-circuit current of track circuits in railway signals.