KR101602283B1 - Onboard systems for monitoring platform that is compatible with heterogeneous power control system - Google Patents

Abstract

The present invention relates to a platform monitoring onboard system. More specifically, the purpose of the present invention is to provide the platform monitoring onboard system compatible with a heterogeneous power control system, which also can be used for a vehicle having a different system of a power control signal input to the platform monitoring onboard system, and can protect devices constituting the onboard system from surge voltage generated when power of an electric locomotive is supplied or cut off. In order to achieve this purpose, the platform monitoring onboard system compatible with a heterogeneous power control system in accordance with the present invention, comprises: a wireless communication unit which includes an antenna for receiving an image signal sent from a ground system; a signal processing unit which converts the image signal received by the wireless communication unit so as to be output by a monitor installed inside a driving vehicle of the electric locomotive; and a power supply unit which supplies power to the wireless communication unit, the signal processing unit, and the monitor by receiving external power and a power control signal. In this regard, the power supply unit, which is a DC-DC converter, includes: a power input unit to which the external power is input; a control signal input unit which is electrically connected to the power input unit and to which the power control signal is input by handling a master control key of the electric locomotive; a switch driving unit which is connected to the control signal input unit and generates certain voltage by the power control signal; a power control switch unit which operates by receiving signals of the switch driving unit and the power input unit; a voltage converting unit which converts voltage of the external power into predetermined voltage and outputs the predetermined voltage by receiving signals of the power input unit, the control signal input unit, and the power control switch unit; and a power output unit which is connected to the voltage converting unit and supplies the power to the wireless communication unit, the signal processing unit, and the monitor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an onboard systems monitoring platform for a heterogeneous power control system,

The present invention relates to a landing monitoring system for receiving a landing image signal, and more particularly, to a landing monitoring system for a landing monitoring system which can be used in vehicles having different power control signals inputted to a landing monitoring system, The present invention relates to a landing monitoring system which is compatible in a heterogeneous power control system, in which a power supply is improved in order to protect equipment constituting an on-board system from occurring surge voltages.

As the number of passengers using urban railways increases steadily due to the expansion and spread of urban railways and high oil prices, train signal systems for safe and accurate operation of electric trains and safety systems for preventing safety accidents at platform And the importance thereof is gradually increasing.

In order to construct the above-described safety system, a screen door system for gradually preventing passengers from falling or firing into a railway track is gradually installed at every platform of the history. However, there are many stations where a screen door system is not yet installed. The electric train signal system is designed to detect the situation of the platform from several hundred meters in the past through the monitor of the cabin by the engineer who operates the train. It can be used for emergency situations such as various platform safety accidents such as a suicide or carelessness, In order to cope with this problem, a platform monitoring system has been included. In the related art, a landing system image information collected from a ground system is transmitted through a wireless communication system through a camera or the like, To receive Korean Patent No. 10-0444929 and Korean Patent Laid-Open No. 10-2003-0051470, which are configured to output to a mounted monitoring device, are disclosed.

On the other hand, in general, electric trains are composed of a single combination of a predetermined number of vehicles electrically and mechanically connected, and the front and rear two of the single train vehicles include a cab of the same system. In order to ensure the consistency of the electric train control, Depending on the direction, one of the front and rear cabes will be selected as the main cab. At this time, the vehicle including the main cab is generally referred to as a 'head car', and various systems in the vehicle are configured to receive signals from a plurality of relays included in the control unit of the head car.

Among the electric train signal systems, an on-board system mounted in a train also generally includes a power control signal output from the front control relay (HCR) by operating a DC power supplied from an electric vehicle and a master controller key And a power supply unit configured to receive and supply a predetermined voltage for operating the respective components of the system.

However, there is a difference in the control method of the on-board system of the electric train depending on the difference between the maker of the electric train, the production timing, the control system applied to the train, and the system configuration inside the electric vehicle, In the signal output method of the HCR, the signal system of the relay signaling system and the DC power '+' signal system are different. When the type of the vehicle is different, the configuration of the power supply system of the on- There is a problem that management of the worker becomes difficult.

The power supply unit of the onboard system generally includes a coil part for converting the DC power supplied from the electric vehicle to a predetermined voltage for operating the configurations of the on-vehicle system. In some, a high surge voltage is generated while a back electromotive force is generated.

However, in the related art, there is no protection means for preventing the surge voltage. Therefore, a separate protection device has to be installed in order to protect the structures connected to the onboard system from the surge voltage.

Korean Patent No. 10-044429 Korean Patent Publication No. 10-2003-0051470

In the landing monitoring system, which is compatible in the power control system of the different kind according to the present invention, the system of the power control signal inputted to the power supply unit is used in the train, which is the contact signal system of the front control relay, And to protect the equipment constituting the system from the surge voltage generated when the power supply of the electric vehicle or the power supply is interrupted.

In the onboard monitoring system, which is compatible in a heterogeneous power supply control system according to the present invention, the onboard monitoring system is installed in a train and receives a video signal transmitted from a terrestrial system installed in the history. A wireless communication unit including a receiving antenna; A signal processing unit for converting the video signal received by the wireless communication unit so that the video signal can be output to a monitor installed in the vehicle; And a power supply unit for receiving external power and power control signals and supplying power to the wireless communication unit, the signal processing unit, and the monitor, wherein the power supply unit is a DC-DC converter including: a power input unit for receiving external power; A control signal input unit electrically connected to the power input unit and receiving a power control signal by a mascot key operation of a train; A switch driver connected to the control signal input unit and generating a constant voltage by a power control signal; A power supply control switch unit for receiving signals from the switch driving unit and the power input unit; A voltage conversion unit receiving a signal from the power input unit, the control signal input unit, and the power control switch unit and converting the external power supply to a predetermined voltage and outputting the predetermined voltage; And a power output unit connected to the voltage conversion unit and supplying power to the wireless communication unit, the signal processing unit, and the monitor, and the power input unit and the control signal input unit are electrically connected to each other to be operated in cooperation with each other, The system of the power control signal can be used in other trains, and the switch driving unit includes a surge voltage prevention circuit for protecting the electrically connected structures from the surge voltage.

The power supply unit may include a power supply unit, a control signal input unit, and a power supply output unit. The power supply unit may include a switch driving unit, a power control switch unit, and a voltage conversion unit, Wherein the power supply unit, the control signal input unit, and the power supply output unit of the power supply unit include at least one input / output terminal including '+' and '-' terminals, respectively, Terminal of the control signal input unit is connected to a '+' terminal of the power input unit, a '+' terminal of the control signal input unit is connected to a switch driving unit, and the power control switch unit is connected to the switch driving unit and the power input unit - 'terminal of the power supply input unit and the control signal input unit are interlocked with each other.

Also, the wireless communication unit may further include a POE module that receives power from the power output unit and supplies power to the antenna through an Ethernet cable, thereby reducing power supply and signal transmission / reception wiring.

In the landing monitoring system, which is compatible in the heterogeneous power supply control system according to the present invention, the power supply input unit and the control signal input unit of the power supply unit are interlocked with each other so that the system of the power supply control signal input to the on- In particular, the power control signal output from the front-end controller relay can be used both as a train, which is a contact signaling system of the relay, and as a train, which is a DC power supply '+' signaling system. The switch driving unit includes a surge voltage- It is possible to reduce the failure rate of the on-board system because each system configuration can be protected from the surge voltage generated in the process of converting and outputting the surge voltage.

In addition, when any one of the components mounted on the circuit board is abnormal due to the connection of the power input part, the control signal input part, and the power output part of the power supply part to the circuit board through the connection terminal, There is an advantage to be able to do.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating a configuration example of a platform monitoring system to which a compatible platform monitoring system is applied in a heterogeneous power control system according to a preferred embodiment of the present invention; FIG.
2 is a block diagram conceptually showing a configuration of a land-bridge monitoring on-board system compatible with a heterogeneous power control system according to a preferred embodiment of the present invention.
3 is a circuit diagram showing an example of the circuit configuration of the power supply unit in FIG.
FIG. 4 is a flowchart illustrating an operation process of a platform monitoring system to which a platform monitoring system is compatible in a heterogeneous power control system according to a preferred embodiment of the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, when an element is referred to as being "comprising " another element in the description of the invention or claims, it is not to be construed as being limited to only that element, Elements may be further included.

1, the present invention relates to a platform monitoring system, which is mounted inside a train and receives a platform image signal transmitted from a ground system installed on the ground such as a history and a track periphery and outputs the platform image signal to a monitor installed in an electric train driver's seat Generally, an electric train signal system is composed of a ground system installed on the ground and an on-board system installed inside the vehicle. The ground system includes information detected from a plurality of surveillance cameras installed on the ground, And to transmit the information necessary for the safe operation of the electric train to the onboard system and the control system.

Among them, the ground system 20 for platform monitoring includes a signal extracting unit 21 for extracting an image of a platform from the image information collected in the history; An image signal processing unit 22 for signal processing and compressing the extracted image so that the upper and lower landing / landing situations of the station in which the extracted image is entering in the driver's seat monitor and the next station are outputted as one image by a plurality of divided screen systems; A signal transmission unit 23 for converting the compressed video signal into an optical signal and transmitting the optical signal through a cable; And a wireless signal transmitter 24 for converting a transmitted optical signal into a network signal and transmitting a wireless signal through an antenna to the landing monitoring system 10 so as to transmit the landing image signal to the landing monitoring system 10 .

At this time, the ground system 20 may further include a communication facility for transmitting and receiving the landing station image information to and from the other station in order to signal the top and bottom landing situation of the incoming station and the next station together on the driver's seat monitor.

2 to 3, in a heterogeneous power control system according to an exemplary embodiment of the present invention, a compatible platform monitoring system 10 includes a platform monitoring system 20 installed in the history, A wireless communication unit 100 for receiving the wireless communication signal; A signal processor 200 for converting the received video signal so that the received video signal is output through the monitor 300 installed in the electric train driver's seat; And a power supply unit 400 receiving external power and a power control signal and supplying power to the wireless communication unit 100, the signal processing unit 200, and the monitor 300.

The wireless communication unit 100 is configured to receive a video signal transmitted from the terrestrial system 20 and includes an antenna 110 capable of receiving a wireless signal. Generally, in order to cope with an emergency, an engineer must smoothly receive and receive a signal related to a landing situation several hundreds of meters before the train enters the station. Therefore, the wireless communication unit 100 may use an NFC method, a Bluetooth method, a Zigbee method, It is preferable that the antenna 110 is configured according to a wireless communication scheme such as RF (Radio Frequency) having a relatively long signal transmission distance rather than the same short-range wireless communication scheme, and the antenna 110 is also configured according to a wireless communication scheme applied to the wireless communication unit 100 . The wireless communication unit 100 according to an embodiment of the present invention is configured by an RF communication method using a frequency of 5.5 to 6 GHz band and an access point (AP) type apparatus that can be applied to the antenna is used. However, Can also be used.

In order to simplify the wiring for supplying power to the antenna 110, the wireless communication unit 100 transmits a signal received through the antenna 110 to another structure of the on- (POE) module configured to use a part of the communication line as a power supply line. The POE module receives the power output from the power output unit 460, which will be described later, and transmits the power to the antenna 110 through the Ethernet cable And the POE module receives the signal received by the antenna 110 and distributes the received signal to other configurations, thereby reducing the wiring required for power supply and signal transmission / reception.

The signal processing unit 200 is configured to decode and decode a video signal so that a video signal received through the wireless communication unit 100 can be outputted through a monitor 300 installed in a cab of an electric train, And a signal processing means such as a video codec for this purpose. Since the signal received by the platform monitoring system 10 compatible in the heterogeneous power control system according to the embodiment of the present invention is based on the video signal, the signal processing unit 200 includes a video codec such as MPEG4 But may further include an audio codec such as MP3 if necessary.

The power supply unit 400 is configured to stably supply power to the wireless communication unit 100, the signal processing unit 200 and the monitor 300 by receiving an external power supply and a power supply control signal supplied from an electric train. In a preferred embodiment, the power supply unit 400 receives DC power from 90V to 110V from the electric vehicle and converts the DC power into DC power of 8.4V to 15.6V necessary for driving each of the components constituting the platform monitoring onboard system The DC-DC converter is configured so that the power input value and the power output value can be changed according to the electric train.

The power supply unit 400 according to an embodiment of the present invention includes a power input unit 410 to which external power is input from the electric vehicle; A control signal input unit 420 electrically connected to the power input unit 410 and receiving a power control signal generated by a mascot key operation of the electric motor vehicle; A switch driving unit 430 connected to the control signal input unit 420 to receive a power control signal to generate a constant voltage to prevent a surge voltage from being generated; A power supply control switch unit 440 operated by receiving a signal from the switch driving unit 430; A voltage converter 450 for receiving a signal from the power input unit 410 and the power control switch unit 440 and converting the voltage of the power source to a predetermined voltage through the coil unit 451 and outputting the voltage; And a power output unit 460 connected to the wireless communication unit 100, the signal processing unit 200 and the monitor 300 to supply power output from the voltage conversion unit 450. [

In the preferred embodiment of the present invention, the power supply input unit 410 of the power supply unit is always powered, and the control signal input unit 420 is a front-end control relay (not shown) operated by operation of the electric- HCR).

The power supply unit 400 further includes a circuit board 470 on one side of which a switch driver 430, a power supply control switch unit 440 and a voltage converter 450 are mounted, The input unit 410, the control signal input unit 420, and the power output unit 460 include at least one input / output terminal including '+' and '-' terminals, respectively. The control signal input unit 420 and the power output unit 460 are connected to the circuit board 470 through the connection terminals 471 provided on the other side of the circuit board 470.

A circuit pattern is formed on the circuit board 470 so that the '+' terminal of the power input unit 410 is electrically connected to the '-' terminal of the control signal input unit 420 and the power supply unit 410 and the control signal input unit The switch driving unit 430 is connected to the control signal input unit 420 and the control signal input unit 420 is connected to the switch driving unit 430 so that the ' Let it work accordingly.

The power supply control switch unit 440 is connected to the circuit board 470 so that the '-' signal of the power input unit 410 and the signal of the switch driving unit 430 are received together and the voltage conversion unit 450 A DC power source of 90 V to 110 V is converted into a DC power source of 8.4 V to 15.6 V according to a signal input from the power input unit 410, the control signal input unit 420 and the power control switch unit 440, The circuit pattern is output.

According to this circuit configuration, the power supply unit 400 according to the present invention operates both when the contact signal of the relay is input to the control signal input unit 410 and when the DC power '+' signal is input, The power supply control signal system of the relay can be used both as a train or as a direct power supply for a train in which a DC power is supplied as a signal system of the relays. Thus, according to the power control system of the train, And it is not necessary to operate the switch separately mounted on the power supply unit in accordance with the situation.

Meanwhile, the switch driver 430 according to the preferred embodiment of the present invention includes a surge voltage prevention circuit including a plurality of serially connected Zener diodes and a series resistor. When the power supply of the electric vehicle or the power supply is interrupted Protects the components mounted on the circuit board 470 from the high surge voltage generated through the coil part 451 of the voltage converting part and protects the components connected to the power supply part 400.

At this time, the power supply control switch unit 440 generally includes a photocoupler device having a property that the input unit and the output unit are electrically insulated from each other, thereby enhancing the surge voltage prevention function of the switch driving unit 430. However, Other techniques that can perform the same function may be used.

The voltage converting unit 450 receives the signals from the power input unit 410, the control signal input unit 420, and the power control switch unit 440, converts the voltage of the external power supply to a predetermined voltage, And a rectifying unit 452 for rectifying the output voltage of the rectifying unit 450 so that a stable power can be output. A voltage output from the voltage converting unit 450 is supplied between the voltage converting unit 450 and the power output unit 460 within a predetermined range It is more preferable that a variable resistor for adjusting the output is connected so that the output value can be adjusted according to the device connected to the power output unit 460.

Operation and operation of the platform monitoring system compatible with each other in the heterogeneous power supply control system according to the embodiment of the present invention will be summarized as follows.

First, when the engine of the electric train inserts the Mascone key and then the main switch is turned ON, the electric train is driven. By the signal generated by the HCR of the head difference control unit, The power control signal is input to the power control unit 420.

In the embodiment of the present invention, a DC power source of 90 V to 110 V supplied from an electric train is connected to the power input unit 410 to be always supplied with power, and the power supply unit 400 is operated so that a DC power source of 90 V to 110 V supplied from a vehicle according to a power source control signal is converted into a DC power source of 8.4 V to 15.6 V by a voltage converter 450, The signal processing unit 200, and the monitor 300 connected to the wireless communication unit 460.

The platform-monitoring onboard system 10 compatible in such a heterogeneous power control system operating in this manner comprises the steps of: (S11) collecting image information within history; Extracting the landing gear image information from the collected image information (S12); A step S13 of inputting the landing image signal extracted in the image processing unit 22 of the terrestrial system together with the landing image signal of the other station; A step (S14) of processing the input video signals in a plurality of divided screen modes so that an engineer can confirm the up and down landing situation of the station where the engineer is entering from the monitor in the train driver's seat and the next stopping station in one image; A step (S15) of compressing the image signal processed by the image signal processing so as to be output in a split screen manner; Converting the compressed signal into an optical signal, and transmitting the optical signal to the wireless signal transmitting unit 24 of the terrestrial system via the cable (S16); (S17) of converting an optical signal into a network signal and transmitting the signal as a wireless signal through an antenna of a terrestrial system. When a video signal is transmitted from the terrestrial system 20 through the antenna 110 of the terrestrial system, (S21); A step S22 of decompressing the received landing platform video signal in the signal processing unit 200; And a step S23 in which the decompressed landing station video signal is outputted through the monitor 300. The engineer performs an operation process of the station 300 to be stopped next time and the phase of the next station to be stopped, If an emergency situation is detected by monitoring the image of the landing platform, it will take measures accordingly.

In the landing monitoring system, which is compatible in the power control system of the different kind according to the present invention, the power source input unit 410 and the control signal input unit 420 of the power supply unit are electrically connected to each other to operate in conjunction with each other, If the system of the signal output from the relay is different and the system of the power control signal input to the onboard system is different, especially when the power control signal is the relay signal, the output signal of the front control relay is a '+' And the surge voltage suppressing circuit is included in the switch driving unit 430 to protect the system components from the surge voltage generated when the power supply or the power supply of the motor vehicle is interrupted, There is an advantage that it can be lowered.

The power input unit 410, the control signal input unit 420 and the power output unit 430 of the power supply unit are connected to the circuit board 470 via the connection terminal 471, When any one of the configurations of the switch driving unit 430, the power control switch unit 440 and the voltage converting unit 450 occurs, there is an advantage that only the circuit board 470 can be easily separated and repaired.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, The present invention is not limited to the embodiments and the accompanying drawings.

10: Compatible platform monitoring system for different power control systems
20: Platform monitoring ground system
21: signal extracting unit 22: video signal processing unit
23: Signal transmission unit 24: Radio signal transmission unit
100: wireless communication unit 110: antenna
200: signal processor 210: codec
300: Monitor 400: Power supply
410: Power supply input unit 420: Control signal input unit
430: Switch driving part 440: Power control switch part
450: voltage converting section 451: coil section
452: rectification part 460: power output part
470: circuit board 471: connection terminal

Claims (3)

1. An on-vehicle system mounted in a train and receiving a video signal transmitted from a ground system installed in a history,
A wireless communication unit including an antenna for receiving a video signal transmitted from the terrestrial system;
A signal processing unit for converting the video signal received by the wireless communication unit so that the video signal can be output to a monitor installed in the vehicle; And
And a power supply unit that receives external power and power control signals and supplies power to the wireless communication unit, the signal processing unit, and the monitor,
The power supply unit is a DC-DC converter, and includes a power input unit to which external power is input; A control signal input unit electrically connected to the power input unit and receiving a power control signal by a mascot key operation of a train; A switch driver connected to the control signal input unit and generating a constant voltage by a power control signal; A power supply control switch unit for receiving signals from the switch driving unit and the power input unit; A voltage conversion unit receiving a signal from the power input unit, the control signal input unit, and the power control switch unit and converting the external power supply to a predetermined voltage and outputting the predetermined voltage; And a power output unit connected to the voltage converting unit and supplying power to the wireless communication unit, the signal processing unit, and the monitor,
The system of the power supply control signal input to the onboard system is electrically connected to the power input unit and the control signal input unit so that the power supply input unit and the control signal input unit can be operated by other trains. A surge voltage suppressing circuit,
The power supply unit includes a switch driving unit, a power control switch unit, and a circuit connected to the power input unit, the control signal input unit, and the power output unit via the connection terminal, Further comprising a substrate,
The power input unit, the control signal input unit, and the power output unit of the power supply unit include at least one input / output terminal including '+' and '-'
The '+' terminal of the control signal input unit is connected to the switch driving unit, and the power control switch unit is connected to the switch driver ' And a circuit pattern is formed to be connected to a '-' terminal of the power input unit, so that the power input unit and the control signal input unit are operated in interlock with each other. delete The method according to claim 1,
The wireless communication unit may further include a POE module that receives power from the power output unit and supplies power to the antenna through an Ethernet cable, thereby reducing power supply and signal transmission / reception wiring. A platform-monitored onboard system compatible with the control system.

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