dynamic tracking of object through gps

7/29/2019 Dynamic Tracking of Object Through GPS

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By:xyz


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The Aim of the project is to design a

system which can navigate, positionand log data for any moving systemand also post the data on a web serverso that anyone with internet can accessand track the movement of system


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System of satellites that provide geo-spatialpositioning with global coverage

Enables receivers to find out latitude,longitude and altitude by radiating accuratetime signals.

Line of sight communication. Applications include navigation, surveying

and mapping, rescue operations, wreckdiving etc.


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GPS is the only fully functioning GNSS systemavailable.

Involves a system of 24 satellites

revolving around the earth. Data sent by the GPS satellites: The time the message was

transmitted.

Precise orbital information(the ephemeris) .

The general system health and rough orbits of all GPSsatellites (the almanac).


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National Marine Electronics Association(NMEA) is a combined electrical and data

specification for communication betweenmarine electronic devices.

GPS receiver communication is defined bythe NMEA format.

Features of the NMEA sentences are:

totally self contained and

independent from other NMEA sentences.


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Each sentence begins with a '$' and ends with acarriage return/line feed sequence.

Each sentence cannot be longer than 80

characters of visible text. Generally, the NMEA communication is

configured as: Data rate of 4800 bits/sec.

Bit length of 8 bits

1 Stop bit

No Parity control


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The Garmin G2 device used has its ownsubset of NMEA sentences.

These commands include: RMC, RMB, GGA,GSA, GSV, GLL, BOD, RTE.

Commands give latitude, longitude, speed ofobject, heading etc.


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Used for interfacing with mobile phones froma PC or computer.

AT commands allow giving instructions toboth mobile devices and ordinary landlinetelephones.

Basic features like calling, sending messagesand setting up GPRS could be done with ATcommands.


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Some of the basic AT commands include:

ATA - Answer command

ATD -Dial command ATH -Hang up call

AT+CBC - Battery charge

AT+CGMI - Request manufacturer identification

AT+CGMM - Request model identification

AT+CGMR - Request revision identification


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Text messaging related commands are: AT+CMGL - List messages

AT+CMGR - Read message AT+CMGS -Send message

In this tracking project, AT commands areused for setting up a GPRS connection to

facilitate sending and receiving GPS data. Mobile phone is interfaced with serial

communication with the server or thereceiver.


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Connect the mobile phone toyour computer using theserial port.

Install and check driverdetails in device manager if

necessary.

Check communication withAT command and wait for aOK response.

Set AT+ATT = 1 to forcemobile is attached to GPRS

Check AT+CGREG? To checkstatus of GPRS attachment

Use AT + CGDCONT toconfigure the GPRS and set

quality of service parameters

Use AT + CGACT to activethe GPRS connection


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KML is an XML notation for expressiongeographical locations and visualizations on

2D and 3D browsers. The KML file specifies a set of features to

facilitate the visualization (place marks,images, polygons, 3D models, textualdescriptions, etc.)

Has applications in navigating, visualization,satellite surveillance etc.


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New delhiCapital of india

77.23798589812928,28.63538550250425,0


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Todays computers dont have serial port inthemThe cable is used to convert the USB port toSerial port.


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Data Terminal Ready: Tells DCE that DTE is ready

to be connected.Data Carrier Detect: Tells DTE that DCE is

connected to telephone line.

Data Set Ready: Tells DTE that DCE is ready to

receive commands or data.

Ring Indicator: Tells DTE that DCE has detected aring signal on the telephone line

Request To Send: Tells DCE to prepare to acceptdata from DTE.


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Clear To Send: Acknowledges RTS and allows

DTE to transmitTransmitted Data: Carries data from DTE to

DCE.Received Data: Carries data from DCE to

DTE.Ground.


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Language Used VC++

Interface on computer : Console

Based

Interface to GPS device: SerialRS232Data format from GPS device :

NMEA 0183

Final file : exe fileOutput : KML file on google earth

software.


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Connect the devices (GPS receiver and GSM device ifnecessary) using the serial communication port.

Device address is input to the program which checks

the device and initializes variables. Communication isready to begin.

GPS receiver sends the data in NMEA 0183 formatwhich is taken by the program and processed in a

buffer.

Latitude, longitude and altitude are extracted fromthe buffer. Multi-threading is used for the web serveras implementing it in a normal program would renderthe server inactive when the processing is being done.

Synchronization is maintained between the threads.A cyclic buffer is used to maintain the tracking

information which is also used by the web server.

The data is available in the web server and can beaccessed by anyone. It is also logged in the host

system also and a kml file is created.


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Data from gps is taken and putinto laptop using serial to usbCable.

$GPRMC,023042,A,3907.3837,N,12102.4684,W,0.0,156.1,131102,15.3,E,A*36 $GPRMB,A,,,,,,,,,,,,A,A*0B

$GPGGA,023042,3907.3837,N,12102.4684,W,1,04,2.3,507.3,M,-24.1,M,,*75$GPGSA,A,3,04,05,,,09,,,24,,,,,2.8,2.3,1.0*36$GPGSV,3,2,11,09,47,229,42,10,04,157,00,14,00,305,00,24,70,154,33*79$GPGLL,3907.3837,N,12102.4684,W,023042,A,A*5E $GPBOD,,T,,M,,*47$GPVTG,156.1,T,140.9,M,0.0,N,0.0,K*41 $PGRME,8.4,M,23.8,M,25.7,M*2B$PGRMZ,1735,f*34 $PGRMM,WGS 84*06 $HCHDG,,,,15.3,E*30

$GPRTE,1,1,c,*37

3907.3837,N,12102.4684,W,


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Http Server is being used.Data from buffer is formatted in KML format

and dumped to server where it can be accessedby anyone.Both the extraction program and serverprogram are made so that the server remainsactive at all points in time.Threading also helps overlap I/O operationswith the processing of data and the servermanagement .


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The system can track and logdata at server and also post thedata to remote location where itcan be used for tracking andlogging.


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This can be used to track locations andmovement of military troops and military vehicles


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The system in miniaturized form can bemounted on UAVs to track their movement


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The system can be combined with gyros to work inan environment with no GPS signal.

Gyro Accelerometer

TrackingSystem


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dynamic tracking of object through gps

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