KR102221226B1 - IoT(Internet of Things) based Black Box System for DC(Direct Current) Switchgear - Google Patents

Abstract

The present invention relates to an IoT-based black box system for a DC switchgear. According to the present invention, the IoT-based black box system for the DC switchgear includes: a display device which displays various data or information on a screen according to a command from a control unit; the control unit which is installed in a main body of a black box system, and performs environmental settings of the black box system, display of various data or information, status check and operation control of components constituting the black box system, processing and storage of input commands and received data, and wired/wireless communication control functions; a communication unit which is installed in the main body of the black box system, and performs wireless short-distance communication with a user′s mobile communication terminal, communication with an external system (server) through an internet network of the mobile communication company, and communication between the black box system and a train control and monitoring system (TCMS) of a railway vehicle; an instrument transformer which is installed in the main body of the DC switchgear, and transforms a high voltage applied to the DC switchgear to a low voltage and supplies the low voltage to a power module of the black box system, or transforms the energized high current of the DC switch to a small current and supplies the small current to the power module; and a storage unit which is installed in the main body of the black box system and stores the environment setting values of the black box system and big data generated in real time.

Description

IoT-based Black Box System for DC (Direct Current) Switchgear}

The present invention relates to an Internet of Things (IoT)-based black box system for a DC switch employed in a railroad vehicle, and more particularly, automatically storing big data on various states that occur during operation of a high-speed circuit breaker, and , It relates to an IoT-based black box system for a DC switch that can transmit big data in real time to a train control monitoring system (TCMS) of a railway vehicle, a smartphone, and an external server.

In recent years, the role of electronic devices is increasing more and more in railway vehicles, and these electronic devices perform functions such as vehicle control and monitoring, broadcasting, and storage of vehicle operation records, while each device exchanges necessary information for the vehicle through communication. Thus, it contributes to improving the stability and convenience of train operation.

The management method for monitoring the safety of the railroad vehicle's operation has been through computerized data management through a worksheet in the record book in the case of a breakdown repair history, and based on the data on the breakdown history, the cause of the breakdown of the railroad vehicle and the As a technique for analyzing the number of times, RCM (Reliability Centered Maintenance) or RAMS (Reliability, Availability, Maintainability and Safety) techniques are applied to railroad management.

The above RCM or RAMS analysis method is a technique applied based on reliability, but these techniques are also difficult to obtain analysis effect when the configuration and use environment of a railroad vehicle are different. Moreover, until now, it is a case of a general railroad site. It remains at the level of benchmarking and is staying at a level that is not specialized. In addition, the development of technology related to railroad vehicles has led to the simplification of maintenance through modularization rather than detailed failure measures, and in light of the reality of introducing a trouble-free system through redundancy and decentralization, RCM or RAMS-based maintenance systems are all Since it is a method of analyzing components targeting, it can be said that improvement is needed in a more efficient way.

On the other hand, Korean Patent Publication No. 10-2014-0032230 (Patent Document 1) discloses a "event recording device for railroad vehicles", and accordingly, the event recording device for railroad vehicles is a variety of events that may occur during the operation of railroad vehicles. A black box type event recording device for storing related data, comprising: a conversion module for receiving a plurality of types of signals from an external input device mounted in a railroad vehicle and converting them into a plurality of types of digital signals; A storage module having a plurality of different storage units; Receiving a plurality of types of digital signals from the conversion module, generating a plurality of different data units including some or all of the received plurality of types of digital signals, and generating a plurality of the plurality of data units, respectively, of the storage module A control module for storing in different storage units of the; And a power control module for supplying power to each unit by receiving power from an external input power or an internal battery.

In the case of Patent Document 1 as described above, by providing a plurality of different memory modules each storing different data units by combining various types of data inputted to the black box type case recording device as a plurality of different data units. However, it has the advantage of not only enabling accurate cause identification from a variety of angles when an event occurs, but also improving the reliability and safety of stored data, but this is the driving information and vehicle input from the control device or sensor installed in the vehicle. The core is to receive image information from the camera mounted on the camera and interpret the event from various angles, and it is difficult to understand in detail various states occurring in certain device elements (eg, DC switchgear). It has a problem.

Korean Patent Application Publication No. 10-2014-0032230 (2014.03.14.)

The present invention was created to improve the problems of the prior art as described above, and automatically stores big data on various conditions that occur during operation of a high-speed circuit breaker, and By transmitting big data to a phone or an external server in real time, when an abnormality occurs in the high-speed circuit breaker and its related device elements, the situation is quickly identified through wired/wireless communication and appropriately responded, ultimately Its purpose is to provide an Internet of Things (IoT)-based black box system for a DC switch that can promote safe operation.

In order to achieve the above object, the IoT-based black box system for a DC switch device according to the present invention,

As a black box system that stores big data on various states that occur during operation of a high-speed circuit breaker, which is a type of DC switch,

A display device that displays various types of data or information on a screen according to a command from a control unit;

It is installed on the main body of the black box system, and it sets the environment of the black box system, displays various data or information, checks the status and operation of components constituting the black box system, processes input commands and received data, and A control unit that performs a storage, wired/wireless communication control function;

It is installed on the main body of the black box system, wireless short-range communication with the user's mobile communication terminal, communication with an external system (server) through the Internet network of a mobile communication company, and TCMS (Train A communication unit for communication between the Control and Monitoring System);

The power module is installed in the main body of the DC switch and converts the high voltage applied to the DC switch to a low voltage and supplies it to the power module of the black box system, or converts the energized high current of the DC switch to a small current. Transformation unit for instruments to be supplied to; And

It is installed on the main body of the black box system, and includes a storage unit for storing environment setting values of the black box system and big data generated in real time.

Here, at a predetermined portion of the body of the display device, a select switch for selecting enable of the power switch and ON/OFF for supplying or cutting off the control power of the black box system A switch and a boot/reset switch for booting or resetting the black box system may be installed.

In addition, the communication unit includes a Wi-Fi module for wireless short-range communication with a user's mobile communication terminal, and an LTE (Long Term Evolution) module for communication with an external system (server) through an Internet network of a mobile communication company. , It can be configured to include an RS485 module for communication with the TCMS (Train Control and Monitoring System) of the railway vehicle.

In addition, the instrument transformer converts a high voltage applied to the DC switch to a low voltage and supplies a voltage transformer (VT) to the power module of the black box system, and converts the high energized current of the DC switch to a small current. It may be configured to include a CT (Current Transformer) supplying the power module of the box system.

In addition, the storage unit stores environment setting values of the black box system, SDRAM in which the clock speed is synchronized with the control unit, and an auxiliary data storage space of the mobile device. It may be configured to include an embedded multi media card (eMMC) or a secure digital (SD) memory card that stores big data on states.

In addition, the black box system according to the present invention further includes a thermistor that measures the ambient temperature, the main contact, the shunt, and the temperature of the terminal of the DC switch and provides it to the power module of the black box system. can do.

At this time, the thermistor is installed on the main body of the black box system to measure the ambient temperature of the DC switch, and the thermistor is installed on the main body of the DC switch (high-speed circuit breaker) to measure the temperature of the main contact point. It may include a second thermistor, a shunt, and a third thermistor that measures the temperature of the terminal.

In addition, a semiconductor switching element installed in the power module to operate when a current equal to or greater than the trip current set value of the black box system is energized, and to trip the DC switch by driving the U-TRIP device of the DC switch may be further included. .

In this case, an Insulated Gate Bipolar Transistor (IGBT) may be used as the semiconductor switching device.

In addition, even if the power of the black box system is cut off, it is driven by the built-in battery. The time from seconds to year is counted depending on the counter of the digital circuit without the intervention of the control unit. It may further include a Real Time Clock (RTC) used as a reference time of big data.

In addition, the GPS module may further include a GPS module that receives a transmission signal from a Global Positioning System (GPS) satellite and calculates a current position, a driving speed, and a driving distance of the black box system.

In addition, it may further include a USB 2.0 Physical Layer (PHY) as an interface for transmitting data to an external USB driver.

In addition, a debug port for debugging a program mounted inside the black box system may be further included.

According to the present invention as described above, big data on various conditions that occur when the high-speed circuit breaker is operated is automatically stored, and big data is transmitted to a train control monitoring system (TCMS) of a railway vehicle, a smartphone, or an external server in real time. By transmitting, when an abnormality occurs in the high-speed circuit breaker and its related device elements, the situation can be quickly grasped through wired/wireless communication and appropriately responded, thereby ultimately promoting safe operation of the railroad vehicle.

1 is a diagram schematically showing the configuration of an IoT-based black box system for a DC switch according to the present invention.
FIG. 2 is a diagram showing a connection relationship between a main body of an IoT-based black box system for a DC switch according to the present invention, and a power module and a DC switch (high-speed circuit breaker).
3 is a front perspective view showing a connection relationship between a display device and a power module of an IoT-based black box system for a DC switch according to the present invention.
4 is a view showing that a selection switch, an on/off switch, and a boot/reset switch are installed in a display device of an IoT-based black box system for a DC switch according to the present invention.
5 is a rear perspective view showing a connection relationship between a display device and a power module of an IoT-based black box system for a DC switch according to the present invention.
6 is a graph showing data storage intervals for each current section in the IoT-based black box system for a DC switch according to the present invention.

Terms or words used in this specification and claims are limited to their usual or dictionary meanings and should not be interpreted, and that the inventor can appropriately define the concept of terms in order to describe his own invention in the best way. Based on the principle, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary. In addition, terms such as "...unit", "...group", "module", and "device" described in the specification mean units that process at least one function or operation, which is hardware or software, or a combination of hardware and software. It can be implemented as

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 5 are diagrams illustrating an IoT-based black box system for a DC switch according to an embodiment of the present invention, and FIG. 1 is a schematic diagram showing the configuration of a black box system, and FIG. 2 is a main diagram of the black box system. It is a diagram showing the connection relationship between the body part and the power module and the DC switch (high speed circuit breaker), FIG. 3 is a front perspective view showing the connection relationship between the display device of the black box system and the power module, and FIG. 4 is a display of the black box system A diagram showing a selection switch, an on/off switch, and a boot/reset switch are installed in the device, and FIG. 5 is a rear perspective view illustrating a connection relationship between a display device and a power module of a black box system.

1 to 5, the IoT-based black box system 100 for a DC switch according to the present invention can be applied to various states that occur during operation of a high-speed circuit breaker, which is a type of DC switch used in a railroad vehicle, and the like. It is a black box system that stores big data about Korea, and it is largely composed of a display device 110, a main body part 120, and a power module 160 that supplies power to the main body part 120. . Here, the display device 110 and the main body 120 may be configured as one body, or may be configured as separate bodies from each other. In this embodiment, a case in which the display device 110 and the main body 120 are configured as one body is illustrated.

The IoT-based black box system 100 for a DC switch according to the present invention as described above includes a display device 110, a control unit 125, a communication unit 130, an instrument transformer 140, and a storage unit 150. Consists of including.

The display device 110 displays various types of data or information (in this case, the data or information may be formed in various forms such as letters, numbers, diagrams, graphs, and specific icons) according to a command from the controller 125 to be described later. Mark on. In addition, a touch panel button (not shown) as an input means is provided on the screen of the display device 110. Therefore, a user (system operator) inputs commands or data using this touch panel button. An LCD may be used as such a display device 110. Here, in a predetermined portion of the body of the display device 110, as shown in FIG. 4, a select switch 111 for selecting an enable of the power switch, and a black box system An on/off (ON/OFF) switch 112 for supplying or cutting off the control power of the device, and a boot/reset switch 113 for booting or resetting the black box system may be installed. .

The control unit 125 is installed on the main body 120 (see Fig. 2) (more precisely, the main PCB in the main body) of the black box system, and displays environment settings of the black box system 100 and various data or information. , It performs status check and operation control of components constituting the black box system, processing and storage of input commands and transmitted data, and wire/wireless communication control functions. As such the control unit 125, a main control unit (MCU) may be used, and in this case, a microprocessor may be used as the MCU.

In addition, the environment setting of the black box system 100 includes the train number, HB serial number (serial number), date (day of the week) and time setting, alarm current setting value, trip current setting value, and name registration when adding temperature sensor options. (E.g., OP1: flexible, OP2: terminal), alarm mailing phone number registration (e.g., up to 5 phone numbers registration), big data storage method setting (e.g., a: save current section, b: Real-time storage of all data).

In addition, the display of the various data or information may include menu selection and setting, display of status, and display of big data. At this time, the big data is the date (day of the week), the closing/closing time, the wiring voltage, the energizing current (the input current, the breaking current), the number of operations (the number of inputs, the number of interruptions), the temperature (ambient temperature, main contact, OP1 (flexible)) , OP2 (terminal) temperature), GPS data (position, speed, driving distance), and control voltage.

The communication unit 130 is installed on the main body unit 120 of the black box system, and provides wireless short-range communication with a user's mobile communication terminal (for example, a smartphone), and an external system (server) through an Internet network of a mobile communication company. ), and communication between the black box system and the train control and monitoring system (TCMS) of the railway vehicle. Such a communication unit 130 includes a Wi-Fi module 131 for wireless short-range communication with a user's mobile communication terminal, and an LTE (Long) module for communication with an external system (server) through an Internet network of a mobile communication company. It may be configured to include a Term Evolution) module 132 and an RS485 module 133 for communication (wired communication) with a Train Control and Monitoring System (TCMS) of a railway vehicle.

The instrument transformer 140 is installed in a DC switch (here, a high-speed circuit breaker) 201 (see Fig. 2), and converts the high voltage applied to the DC switch to a low voltage (for example, 8V or less) to form a black box. It is supplied to the power module 160 of the system, or converts the energized high current of the DC switch to a small current, converts the small current to a voltage, and supplies it to the power module 160 of the black box system. Such an instrument transformer 140 converts the high voltage applied to the DC switch into a low voltage and supplies it to the power module 160 of the black box system, and the DC switch. Transforms the energized high current into a small current, converts the small current back to a voltage (for example, 8V or less) (resistance is added in the CT to convert the current into a voltage) and supplies it to the power module 160 of the black box system. It may be configured to include a CT (Current Transformer) 142.

The storage unit 150 is installed in the main body unit 120 of the black box system, and stores environment setting values of the black box system and big data generated in real time. Such a storage unit 150 stores environment setting values of the black box system, and is an SDRAM 151 in which a clock speed is synchronized with the control unit 125 and an auxiliary data storage space of a mobile device. It may be configured to include an eMMC (Embedded Multi Media Card) 152 or SD (Secure Digital) memory card that stores big data on various states that occur in real time when the circuit breaker is operated.

The black box system 100 according to the present invention having the above configuration is preferably a power module of the black box system by measuring the ambient temperature, main contact, shunt, and terminal temperature of the DC switch. It may further include a thermistor (thermistor) 161 provided to (160).

At this time, the thermistor is installed on the main body 120 of the black box system to measure the ambient temperature of the DC switch, and the main body 201 of the DC switch (high-speed circuit breaker). It may be configured to include a second thermistor 161b that is installed to measure the temperature of the main contact point, and a third thermistor 161c that measures the temperature of the shunt and terminal.

In addition, a semiconductor switching device that is installed in the power module 160 and operates when a current equal to or greater than the trip current set value of the black box system 100 is energized, and trips the DC switch by driving the U-TRIP device of the DC switch. It may further include (162). In this case, as the semiconductor switching device 162, an Insulated Gate Bipolar Transistor (IGBT) may be used.

In addition, even if the power of the black box system 100 is cut off, it is driven by the built-in battery 164, and the time from second to year is recorded in the counter of the digital circuit without the intervention of the control unit 125. It counts depending on and may further include a Real Time Clock (RTC) 163 used as a reference time of big data of the black box system 100.

In addition, a GPS module 165 that receives a transmission signal from a Global Positioning System (GPS) satellite and calculates the current position, driving speed, and driving distance of the black box system 100 (ie, a high-speed circuit breaker in which the black box system is installed). ) May be further included.

In addition, a USB 2.0 Physical Layer (PHY) 166 as an interface for transmitting data to an external USB driver 167 may be further included.

In addition, debugging of a program mounted inside the black box system 100 (for example, a program for operating the black box system or an application program for controlling components by a control unit) is performed. It may further include a debug port 168 for.

Here, a more detailed description will be given in relation to the function of the control unit 125.

The control unit 125 has a function of storing status information as part of a control function. In this case, the controller 125 may scan at intervals of less than every 1 [ms] and then store data at a time interval as shown in Table 1 below according to the section of the energized current.

At this time, the control unit 125 may be configured to store 1 second (total 2 seconds) of data for each of the front and rear sections when the energized current section changes (passes).

In addition, the controller 125 may be configured to store all data at intervals of 1 [ms] or less, and to sequentially delete initial data when the storage capacity is exceeded (the number of operations, driving distance, etc. are stored and maintained).

In addition, the controller 125 may have a function of managing an alarm current value or more as an event.

In this case, the set current may be set so that the user can arbitrarily change the current trip value or less. The controller 125 may output an alarm alarm at a set current (prevention of an accident), and may generate an alarm when data of the alarm current value persists for 10 seconds or more.

In addition, the controller 125 may generate a trip signal when the current trip value is reached. A trip device using a semiconductor switching device (eg, IGBT) may trip a high-speed circuit breaker by driving a U-TRIP device built into the high-speed circuit breaker.

In addition, the control unit 125 scans the operation state big data at intervals of 1 [ms] or less, and stores real-time or each energized current step (at this time, separating the storage interval at the time of passing the upper and lower sections of each step and the storage interval at the time of stabilization, step 10 It is subdivided and stored), failure prediction and pre-alarm for maintenance can be generated. At this time, it is possible to set the alarm current and trip current, and a maintenance alarm can be generated when the number of interruptions per energization section or temperature rise is exceeded.

In addition, since the control unit 125 has a function of processing and storing data, it performs data processing functions such as collecting, recording, and transmitting/receiving data according to environment setting conditions. The recorded data can be stored within the capacity of the eMMC memory, and the storage capacity can be expanded if necessary. The memory capacity may be composed of, for example, a capacity capable of storing data of 6 months or more. In this case, when the memory capacity is exceeded, previous data may be sequentially and automatically deleted. The controller 125 may have a function of downloading data through USB and downloading a notebook computer by connecting a data cable (RJ45 modular jack). In addition, a large amount of files can be transferred by FTP (File Transfer Protocol), and the downloaded data can be output in the form of an Excel sheet or an analog graph by a separate PC operating program. In addition, communication between the black box system and the PC may be performed using an operating program mounted on the PC. In addition, it is possible to interlock Wi-Fi between the black box system and a smartphone using a smartphone application, and to search and download real-time big data using an LTE network.

Meanwhile, FIG. 6 is a graph showing a data storage interval for each current section in the IoT-based black box system for a DC switch according to the present invention.

Referring to FIG. 6, this is a graph showing the data storage interval for each current section in relation to Table 1. As shown in FIG. 6, 0.5 Data is stored at intervals of seconds (500ms) and at intervals of 30 seconds in the current stabilization period.

The IoT-based black box system for a DC switch according to the present invention as described above has the following features.

1) By analyzing the stored big data, it is possible to immediately identify the cause of the accident when an accident occurs.

2) Quantitative maintenance standards based on the number of operations can be established in the time-based maintenance standards.

3) It is possible to change from maintenance based on the know-how and experience of inspectors to statistical maintenance using real-time big data.

4) Blocking by black box trip current setting and backup protection by magnetic trip device of the high-speed circuit breaker body are possible.

5) When an alarm occurs, an alarm mailing can be sent to up to 5 people (when selecting the customer's LTE modem), allowing quick response in case of an emergency.

Tables 2 to 4 below show a comparison of the characteristics of a conventional general-type high-speed circuit breaker and a high-speed circuit breaker with a built-in IoT-based black box system for a DC switch according to the present invention.

As can be seen from Table 2 above, in the case of a general-type high-speed circuit breaker, it is not possible to check the operating state of the high-speed circuit breaker, whereas in the case of a high-speed circuit breaker with a built-in black box system according to the present invention, the black box big for the operating state. It is possible to check the data stored in the data, as well as wireless real-time confirmation via Wi-Fi or LTE modem.

As can be seen from Table 3 above, in the measurement of contact wear and inspection of the arc horn, the black box system of the present invention is built-in, whereas the conventional general type high-speed circuit breaker is performed every 18 months per hour. In the case of a high-speed circuit breaker, it is performed in units of the number of operations, for example, every 400 trip current value, every 1000 times of 750-1200A interruption, every 5000 times of 50-750A interruption, every 20,000 times of 50A or less interruption, etc. Accordingly, it is possible to establish a quantitative maintenance standard based on the number of operations in the conventional time-based maintenance standard.

As can be seen from Table 4 above, when looking at the safety accident prevention aspect, in the case of a conventional general high-speed circuit breaker, there is no backup protection function because it is only trip (primary) by its own electromagnetic force. In the case of a high-speed circuit breaker with a built-in box system, when the current trip value of the main body is set or less, accurate blocking (primary) is performed by the black box system, and the operation of the black box system is delayed or an error occurs due to its own electromagnetic force. Because the trip (secondary) is made, backup protection is possible.

As can be seen from Tables 2 to 4 as described above, it can be seen that the high-speed circuit breaker with a built-in IoT-based black box system for a DC switch according to the present invention is superior to the conventional high-speed circuit breaker in various ways. have.

As described above, the IoT-based black box system for a DC switch according to the present invention automatically stores big data on various states that occur during operation of a high-speed circuit breaker, and a Train Control Monitoring System (TCMS) of a railroad vehicle. By transmitting big data to an external server in real time, a smartphone, and an external server, when an abnormality occurs in the high-speed circuit breaker and its related device elements, the situation is quickly identified through wired/wireless communication and appropriately responded to, ultimately, the railroad There is an advantage that can promote the safe operation of the vehicle.

As described above, the present invention has been described in detail through preferred embodiments, but the present invention is not limited thereto, and various changes and applications can be made without departing from the technical spirit of the present invention. It is self-explanatory to the technician. Therefore, the true scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: (Invention) IoT-based black box system for DC switchgear
110: display device 111: select switch
112: on/off switch 113: boot/reset switch
120: main body of the black box system
125: control unit 130: communication unit
131: WIFI module 132: LTE module
133: RS485 module 140: instrument transformer
141: VT 142: CT
150: storage unit 151: SDRAM
152: eMMC (Embedded Multi Media Card)
160: power modules 161a to 161c: first to third thermistors
162: semiconductor switching element 163: RTC
164: battery 165: GPS module
166: USB 2.0 PHY 167: USB driver
168: debug port
201: Main body of DC switch (high-speed circuit breaker)

Claims (13)

As a black box system that stores big data on various states that occur during operation of a high-speed circuit breaker, which is a type of DC switch,
A display device that displays various types of data or information on a screen according to a command from a control unit;
It is installed on the main body of the black box system, and it sets the environment of the black box system, displays various data or information, checks and controls the status of components constituting the black box system, processes input commands and received data, and A control unit that performs a storage, wired/wireless communication control function;
Installed on the main body of the black box system, wireless short-range communication with the user's mobile communication terminal, communication with an external system (server) through the Internet network of a mobile communication company, the black box system and TCMS (Train A communication unit for communication between the Control and Monitoring System);
The power module is installed on the main body of the DC switch and converts the high voltage applied to the DC switch to a low voltage and supplies it to the power module of the black box system, or converts the energized high current of the DC switch to a small current. Transformation unit for instruments to be supplied to; And
It is installed in the main body of the black box system, and includes a storage unit for storing environment setting values of the black box system and big data generated in real time,
In a predetermined portion of the body of the display device, a select switch for selecting enable of a power switch, an ON/OFF switch for supplying or cutting off the control power of the black box system, and , A boot/reset switch is installed for booting or reset of the black box system,
The control unit scans the operating state big data at intervals of 1 [ms] or less and stores in real time or each energized current step. , A black box system based on IoT for DC switchgear, characterized in that it generates a pre-alarm for failure prediction and maintenance.
delete delete delete delete The method of claim 1,
For a DC switch, characterized in that it further comprises a thermistor that measures the ambient temperature, the main contact, the shunt, and the temperature of the terminal of the DC switch and provides it to the power module of the black box system. IoT-based black box system. delete The method of claim 1,
IoT-based for DC switchgear, characterized in that it operates when a current higher than the trip current set value of the black box system is energized, and further comprises a semiconductor switching element that trips the DC switchgear by driving the U-TRIP device of the DC switchgear. Black box system.
delete delete delete delete delete

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