Development of low cost railwaymonitoring equipment

Tudor Popa, Lucian Anghel, Dorin Burețea

monitoring equipment

Consortium Meeting, Brussels – 4th November 2016

• Acceleration of overhead line

• Acceleration of plain line and S&C

• ECVM - Equipment for current & voltagemonitoring

Content

monitoring

• Low cost smartphone sensors for vehicle andinfrastructure monitoring

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The system is designed according with T3.4 andcontains the next three types of devices:

• WSDO (Wireless Sensor Device for Overhead Lines)

Acceleration of overhead line (1)

• WCDO (Wireless Concentrator Device for Overhead Lines)

• WLRCD (Wireless Long Range Communication Device)

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Schematic design of the devices placement

Acceleration of overhead line (2)

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Block design of the system

Acceleration of overhead line (3)

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General Considerations:

• As objective: to collect vibrations anddisplacement information at the contact point;these data will help modeling process.

• Electrical restrictions: electrostatic discharge and

Acceleration of overhead line (4)

• Electrical restrictions: electrostatic discharge andelectromagnetic field intensity

• Mechanical restrictions: high difficulty of installingand maintenance of WSDO devices;

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Acceleration of overhead line (5)

Similar applications: Power Line Monitoring

• Wireless powerline sensors hang from an overheadpower line and sends data to collecting device.

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Technical requirements:

WSDO - Wireless Sensor Device for Overhead lines

• Electronic components, battery and the pack ofphotovoltaic cells will be compound in a rigid block oftransparent resin, sealing class at least IP67

• Mounting on grooves of the contact wire using a metal

Acceleration of overhead line (6)

• Mounting on grooves of the contact wire using a metalclamp;

• Total autonomy using battery and photovoltaic cells;

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• Sensors used: three axis accelerometer(±2g/±4g/±8g/±16g selectable full scales; 1Hz to 5.3 kHz selectable SPS) and centigradetemperature sensor.

• Data is transmitted over a short distance to

Acceleration of overhead line (7)

• Data is transmitted over a short distance toWCDO type device, using IEEE 802.15.4 RFstandard as 2.4 GHz and a ZigBee protocolstack.

• The firmware will make filtering of usefuldata as ”train in range”.

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WCDO - Wireless Concentrator Device forOverhead lines

• Collects data from WSDO’s;

• Sent sensors data to the device WLRCD withdata logger and long range communication

Acceleration of overhead line (8)

data logger and long range communicationcapability.

• Gateway device for WSDO, of the externalsettings and commands.

• Total autonomy using battery and photovoltaiccells; Housing box with at least IP65;

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WLRCD - Wireless Long Range CommunicationDevice

• Receive data from WCDO, using RS485 full duplexstandard.

• Provides data logger function using SD Card with

Acceleration of overhead line (9)

• Provides data logger function using SD Card with16 GB; is active when missing the long rangecomm.

• Default for Long Range Communication is Wi-FiEthernet; secondary will be GSM support.

• Total autonomy using battery and photovoltaiccells; Housing box with at least IP65;

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The proposed system is very similar withacceleration for overhead line system. There aredifferences as placement on the foot of the rail,for sensor devices.

Types of devices:

Acceleration of plain line and S&C (1)

Types of devices:

• WSDR (Wireless Sensor Device for Rail)

• WCDR (Wireless Concentrator Device for Rail

• WLRCD (Wireless Long Range CommunicationDevice)

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Possible placing locations:

Acceleration of plain line and S&C (2)

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The purpose of the equipment:

• The equipment is designed for monitoring the electricitysupply of the locomotive; will be measured the voltage atthe entrance to the train, from the pantograph; the secondvalue measured is the current absorbed through the maintransformer.

ECVM - Equipment for current & voltagemonitoring

transformer.

The current situation:

• Currently there are electric equipment mounted onlocomotives that measure voltage and current in order tocount the energy absorbed for establishing the costs, butalso to inform the locomotive driver about electricalparameters: voltage and current, but only as RMS values.

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ECVM - system installation on the locomotive

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• With the frequency as default 500 SPS, ECVMsamples and evaluates the current of primarytransformer and voltage from the main locomotivepantographs, it is using for this purpose theinstrumentation transformers already installed formetering of electricity consumed;

ECVM - equipment features

metering of electricity consumed;

• Forward the measured data to a Laptop, using aserial interface and save data on the storagedrive(HDD, SSD, etc.).

• The laptop can add bookmarks as time andgeographical coordinates using an external GPS.

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• Installation and construction details are presentedfor EA060, Romanian locomotive

• ECVM is placed into the driver cab; in the samelocation will be also the Laptop for control and datastorage.

• ECVM will be placed close to the junction box with

ECVM – description (1)

• ECVM will be placed close to the junction box withinput cables from voltage and current transformers.

• ECVM connection with the Laptop is done via aduplex serial cable

• The main components of the ECVM are DCVM(Device for Current and Voltage Monitoring) andPSM (Power Supply Module)

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ECVM Components

PSMDCVM

ECVM – description (2)

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PSM(Power Supply Module)

DCVM(Device for Current and

Voltage Monitoring)

ECVM - Equipment for current & voltage monitoring

PSM are supplied from the storage battery of the locomotive; for EA060 this

PSM - Power Supply Module

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PSM are supplied from the storage battery of the locomotive; for EA060 thisvoltage is 110 Vdc. In the technical data, as well as from the experience ofoperation, the battery voltage may vary from -30%, + 20%, which is in the range77V - 132V of the first DC/DC Converter.

PSM consists of two blocks:• One DC / DC converter, which supplies the 24 Vdc output from locomotive

power supply (110 Vdc). The converter has input/output galvanic isolationtransformer.

• An inverter powered by 24Vdc, with output of 220V/ 50Hz sine or modifiedsine. The inverter has galvanic isolation transformer Input/ Output

DCVM - Device for Current and VoltageMonitoring

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DCVM is powered by 24Vdcfrom PSM and the laptop issupplied from inverter ofthe PSM, at 220Vac

• DCVM energy power, as 24Vdc, is supplied througha converter with galvanic isolation transformer,which provides -5V and + 5V output, using ownground.

• The current information is taken from the

DCVM characteristics

• The current information is taken from themeasuring transformer of the locomotive, whichhas a ratio of transformation from 500A to 5A.

• Voltage of the contact line is achieved frominstrumentation transformer of the locomotive;which is a transformer from 25kV to 100V.

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Low cost smartphone sensors forvehicle & infrastructure monitoring

Low cost smartphone sensors for vehicle &infrastructure monitoring

The main goals of this activity is development anapplication for a Low Cost Smartphone:

• Using Android SDK

• Based on smartphone accelerometer and GPS (globalpositioning system)

• For data collection in order to measurement of ride comfortand obtain the track inputs through a low-cost approachwhich will collect large volumes of data.

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Propose System Architecture

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Android application service forsensor acquisition data (1)

Use case diagram of the Sensor Acquisition,represent the functionalities of the application at railunit (user) level.

• The Add Data functionality helps the user tocreate and record data of interest based Locationand Vibration Data.

• View Saved Data functionality lists all the saved

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Application for sensor acquisition data Use Case Diagram

• View Saved Data functionality lists all the saveddata (Location + Vibration) of the user, it helps theuser to create specific log and share / send hissaved log by data transmission services.

• The Settings functionality helps the user toAccelerometer setting characteristics, dataconnection for external GPS, modality totransmission data to the Server (Adhoc ORAutomatic by Scheduler).

Android application service forsensor acquisition data (2)

Interface for local reporting and interrogation data

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Interface for setting and start / stop datatransitions services

A) Android application gateway for data transmission -This component of the mobile system is responsible forreading data collected locally and sending them tocrowd-data system via Internet.

B) Android application for local reporting andinterrogation data - This component of the mobilesystem is responsible for reading data collected locallyand display information in graphic format.

Design of crowd-data system (1)

URL Met

hod

Parameters Description

/login POST username,

password

User login

/vibrations POST vibration To create new vibration

/vibrations GET Fetching all vibrations

/vibrations/:id GET sessionid,

railunitid

Fetching single specific session vibration

In the following table are the list of API calls.

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Reference system architecture

The crowd-data system is responsible for datacollection from mobile terminals via thecommunication module described above, and fromphysical point of view it is an application that containthe following functional components: datacommunication, processing and storing data received,user interface functions through dedicated graphicalcontrols (database query, display information inanalysis format, commands and queries toward thelocal device, etc.).

Design of crowd-data system (2)

Reporting web interface for crowd-data server

This component of the Crowd-

Data system is responsible for

user interface functions

through dedicated graphical

controls (database query,

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controls (database query,

display information in analysis

format, commands and

queries toward the local

device, etc.).

Thank you!Thank you!

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Development of low cost railway monitoring equipmentSlide Number 1Slide Number 2Slide Number 3Slide Number 4Slide Number 5Acceleration of overhead line (5)Slide Number 7Slide Number 8Slide Number 9Slide Number 10Slide Number 11Slide Number 12Slide Number 13Slide Number 14Slide Number 15Slide Number 16Slide Number 17Slide Number 18Slide Number 19Slide Number 20Low cost smartphone sensors for �vehicle & infrastructure monitoringPropose System ArchitectureAndroid application service for sensor acquisition data (1)Android application service for sensor acquisition data (2)Design of crowd-data system (1)Design of crowd-data system (2)Slide Number 27