JPH03136971A - Control device of electric railroad switch - Google Patents

Abstract

PURPOSE:To reduce the total cost of equipment, to improve the reliability of railroad switch control, and to realize a compact size, by providing a built-in microcomputer in an electric railroad switch connected to an electron linking device to control the switch operation. CONSTITUTION:The control of an electric railroad switch 5 is composed to be carried out by a microcomputer, and the control data to respective railroad switches 5 and various kinds of information from the railroad switches 5 are transmitted through a transmitter 11 serially. As a result, an apparatus chamber 21 in which an electronic linking device is furnished and plural railroad switches 5A to 5E provided on rails 22 can be connected to each other with a single cable 23 to transmit the control data, and each one can select and accept the control data to itself on the sides of respective railroad switches 5A to 5E. Consequently, a local area network transmission system is adopted to enable connection cable to be reduced remarkably. Furthermore, a polling transmission system in which a linking processor 4 asks the operational condition and the like and requests the answer to the railroad switches 5A to 5E can be realized, so that the influence of noise can be hardly received.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a control device for an electric switch machine connected to an electronic interlocking device that links and controls a plurality of signal safety devices using a microcomputer. Regarding.

<Prior Art> In railway transportation, there is an interlocking device as a device for smooth train operation in, for example, station premises. this is,
A certain order of handling should be established between the signals within the station premises, or between the signals and the switch, and if necessary, the switch or signal may be locked to create a chain relationship to prevent incorrect handling. This is what makes each of them work.

As such an interlocking device, due to recent advances in electronics technology, electronic interlocking devices that perform interlocking control using a microcomputer are being put into practical use in place of conventional relay interlocking devices that use relays.

This electronic interlocking device has a display control panel that displays operation commands and operating status of field equipment such as switches and signals based on input of train route information, etc. an interlocking processing unit using a microcomputer configured in a multiple system that controls the operation of the on-site equipment, inputs operating status information from the on-site equipment, and transmits the information to the locking control and display control unit of the on-site equipment; It is configured with an interface section that interfaces between the processing section and the field equipment, and furthermore, the interface section is configured with a relay, and the interface section is made smaller and lighter, and the reliability of the interlocking device is improved. In order to achieve this, there is a possibility that the interface section is an electronic terminal section composed of a microcomputer or the like.

By the way, the conventional control method for electric point machines controlled by the electronic interlocking device is to have a magnetic holding relay and a circuit controller built into the switch machine, and to control the magnetic holding relay by commands from the electronic interlocking device. The electronic interlocking device controls the direction of energization to control the rotational direction of the motor and change it to a predetermined direction, and also uses the contact information of the circuit controller based on the switching operation as information on the operating status of the point machine via the interface section. It is configured to transmit the information to the interlocking processing section of the.

To explain the control operation of such an electric point machine in an example where it is connected to a relay-less electronic interlocking device, first, the control information of each point machine is transmitted from the interlocking processing section of the electronic interlocking device to each point machine. Enter the information into the correspondingly installed electronic terminal.

Then, according to the switching command information based on the control information from the electronic terminal unit, the magnetic holding relay is controlled to change the polarity, the rotational direction of the motor is controlled, and the switch is moved in the commanded switching direction (
(orientation or antiposition). Then, contact information of the circuit controller based on the switching operation of the switch is outputted to the electronic terminal unit as switching operation information of the switch.

When the electronic terminal unit detects the completion of switching of the switch machine from the contact information of this circuit controller, the locking command from the electronic terminal unit short-circuits the cable connected to the magnetic holding relay and the switch machine is switched off. The operation is locked to prevent the switch from being changed illegally.

(Problem to be Solved by the Invention) However, in the case of a conventional electric point machine using a magnetic holding relay and a circuit controller, as shown by the broken line in Fig. 2, the interlocking processing section of the electronic interlocking device The electronic terminals in the equipment room 21 where the electronic terminals are installed and the plurality of electric switch machines 5A to 5E installed at each branch of the track 22 in the station premises are individually connected in a one-to-one relationship. There is a problem in that there are many wiring cables that need to be connected.

For example, referring to FIG. 3, a conventional point machine 31 includes a magnetic holding relay WR, a motor 32 . A motor circuit 33 for driving the motor 32. The operating position of the point machine 31 is detected and a motor circuit 33 and a display circuit 34 (to be described later)
It is composed of a circuit controller 35 that controls the energization of the switch, the above-mentioned display circuit 34 that detects the opening direction of the switch 31, etc., and eight cables a to h are required to connect the switch 31. be. In the figure, FC represents a field coil, and R represents a rotor.

After the magnetic holding relay WR has been given a control command by the polarity reversing circuit 36 of the interlocking processing unit 30 and has finished turning in a predetermined direction, the magnetic holding relay WR is closed by a short circuit 37 to prevent it from malfunctioning due to the continuous current entering the cable. There is a short circuit between the coils. However, if the cable is long, a potential difference occurs due to cable resistance, so malfunctions due to continuous current cannot be completely prevented.

To be complete, a short circuit must be created within the switch 31, and a control line is required for the short circuit.

In the display circuit 34, which is made up of the contacts N and R of the circuit controller 35 and the contacts of the magnetic holding relay WR, this is to prevent erroneous detection of the opening direction due to continuous current entering the cable due to induction etc. , it is necessary to take measures such as lowering the impedance of the opening direction' detection circuit 38 itself.

The circuit controller 35 itself must also have special contacts NC and RC for cutting off the motor power with a mechanically complex structure. Since the magnetic holding relay WR and the circuit controller 35 have mechanical structures, they are susceptible to stress caused by vibrations and the like, and are inevitably susceptible to problems due to poor contact at the contact points.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a control device for an electric point machine that can be controlled by an electronic interlocking device without using a magnetic holding relay or a circuit controller.

<Means for Solving the Problems> Therefore, the present invention provides an electric point machine that drives and controls a motor based on a command from an electronic interlocking device to perform a tongue rail conversion operation. A control section including a microcomputer that controls the motor drive section to be driven based on control information transmitted from the electronic interlocking device, a position detection section that detects the switching position of the tongue rail, and a control section that controls the control information from the electronic interlocking device. and a transmission section that transmits point operation information from the control section based on position detection information from the position detection section to the electronic interlocking device. Configured.

<Operation> In the above configuration, when control information is output from the electronic interlocking device, the control information is taken in to the control section consisting of a microcomputer via the transmission section. The control unit drives and controls the motor drive unit based on the received control information so as to drive and control the rotation of the motor in a predetermined direction in order to change the tongue rail to a predetermined position (normal position or reverse position) corresponding to the control information. . The position detection section detects that the tongue rail has reached a predetermined position and the switching operation is completed, and outputs position detection information to the control section. The control section also outputs conversion completion information to the electronic interlocking device side via the transmission section based on the information from the position detection section. When the electronic interlocking device receives conversion completion information from the switch machine side, it outputs tongue rail locking command information to the switch machine side, if necessary. Based on the lock command information, the control section stops the power supply to the motor by the motor drive section and locks the tongue rail.

In this way, by controlling the drive of the point machine using a microcomputer, it is possible to reduce the equipment cost and improve the reliability of the interlocking device by reducing the number of connection cables between the electronic interlocking device and the switch machine. Improvements can be made.

<Example> Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIG. 1 showing this embodiment, the electric point machine 5
is connected to the interlocking processing section 4 by, for example, an optical cable 6.

In the figure, the transmission section 11 inputs control information from the interlocking processing section 4 and transmits it to the control section 12.
The point machine operation information from is transmitted to the interlocking processing section 4. The control section 12 is composed of a fail-safe microcomputer, and drives and controls the motor drive section 13 based on the control information transmitted from the transmission section 11. The motor drive section 13 includes a solid state relay (
SSR), and controls power on or power off to the conversion motor 14 based on commands from the control unit 12. The position detection unit 15 detects the position of a locking ring linked to the tongue rail converted and driven by the motor 14 in a non-contact manner using a method such as light or magnetism, and determines that the tongue rail is at a predetermined position (orientation position) corresponding to the control command. The control unit 12 detects whether or not it has changed to
Output to. The lock misalignment detection unit 16 is for detecting misalignment of the locking ring that may occur as a result of the operation of the switch machine, and the misalignment of the locking ring exceeds a preset limit value. In this case, the control unit 12 outputs lock disorder information to the control unit 12. Further, a current sensor 17 is provided on the power supply line to the motor 14 to detect whether or not current is flowing through the power supply line and input the detection result to the control section 12.

The operation of the control device for the electric point machine having such a configuration will be explained.

For example, in the interlocking processing unit 4, based on the control information of the switch 50 and the train location information from the field equipment, Predetermined control information is output to 5.

At the point m5, the control information is taken into the control section 12 via the transmission section 11. Then, the control unit 12 controls the motor drive unit based on the acquired control information to rotationally drive and control the motor 14 in a predetermined direction in order to change the tongue rail to a predetermined position (normal position or reverse position) corresponding to the control information. 13 is driven and controlled. As a result, the motor 14 is driven and the tongue rail is changed to a predetermined position (normal position or reverse position) via the operating rod or the like. The locking ring slides as the tongue rail converts, and when the position detection unit 15 detects based on the position detection of the locking ring that the tongue rail has reached a predetermined position and the conversion operation is completed, this detection is performed. The information is input to the control section 12.

The control unit 12 outputs the input conversion completion information to the interlock processing unit 4 via the transmission unit 11. When the interlock processing unit 4 receives the conversion completion information, it outputs lock command information to the switch 5. This lock command information is input to the control unit 12 via the transmission unit 11, and the control unit 12
3 to supply power to the motor 14, and causes the motor drive section 13 to cut off the motor 14 and the power supply. As a result, the switch machine 5 becomes locked.

Furthermore, a current sensor 17 provided on the power supply line of the motor 14 constantly detects the presence or absence of current in the line. For this reason, for example, when a foreign object is caught between the tongue rail and the basic rail and the tongue rail does not complete conversion within a predetermined time and current flows through the power supply line for more than a predetermined time, the information from the current sensor 17 Control unit 12
transmits the abnormality information to the interlock processing unit 4, and based on the information from the interlock control unit 4, it is possible to perform control such as performing retry control after returning to the previous state.

In this way, the electric point machine 5 is controlled by a microcomputer, and control information to each axis point machine 5 and various information from the point machine 5 are serially transmitted via the transmission section 11. Then, for example, as shown in FIG. 2, the equipment room 21 in which the electronic interlocking device is installed and the plurality of switch machines 5A to 5E arranged along the track 22 can be connected with one cable 23. Then, the cable 23 is connected to each axis machine 5A to 5E.
It is possible to transmit control information to each axis machine 5A to 5E and selectively import control information for itself on the side of each axis machine 5A to 5E, making it possible to adopt such a LAN (local area network) transmission system. Therefore,
Compared to the conventional method of connecting the electronic interlocking device and the switch machine individually, the number of connecting cables can be significantly reduced.

Furthermore, in the past, the form of operating status information from a switch was static because it was contact information for a circuit controller, and for this reason, incorrect information could be generated if some noise entered the cable for transmitting the information. There was a gap in the transmission. On the other hand, if a microcomputer system is used as in this embodiment, the interlocking processing unit will ask each axis machine about its operating status, etc., and the answer will be obtained from each axis machine, so-called polling transmission. method, and is less susceptible to noise.

Although it is preferable to use an optical cable, which can transmit a large amount of information, for connection between the electronic interlocking device and the electric switch machine, it is not necessarily limited to an optical cable, and other cables can also be used. be.

<Effects of the Invention> As explained above, according to the present invention, the electric point machine connected to the electronic interlocking device is configured to have a built-in microcomputer to control its operation. Compared to systems that use circuit controllers or circuit controllers, the number of connection cables with electronic interlocking devices can be significantly reduced, reducing the total cost of equipment. Moreover, the reliability of the control of the point machine is improved, and the point machine itself can be made more compact.

[Brief explanation of the drawing]

Fig. 1 is a block configuration diagram showing an embodiment of the control device for an electric point machine according to the present invention, and Fig. 2 shows the connection between a plurality of electric point machines arranged along a track and an electronic interlocking device. FIG. 3 is a circuit configuration diagram showing a conventional example.

Claims (1)

[Claims] In an electric point machine that performs a tongue rail switching operation by driving and controlling a motor based on a command from an electronic interlocking device, the control transmitted from the electronic interlocking device controls a motor drive unit that drives the tongue rail switching motor. A control section consisting of a microcomputer that performs control based on information, a position detection section that detects the switching position of the tongue rail, and a position detection section that transmits control information from an electronic interlocking device to the control section and detects the position from the position detection section. 1. A control device for an electric switch machine, comprising: a transmission section that transmits switch operation information from the control section based on the information to an electronic interlocking device.