Gps navigation
Upcoming SlideShare
Loading in...5
×

Like this? Share it with your network

Share
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
789
On Slideshare
789
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
46
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. GPS Based Device for Navigation
    By- SujayCharania(07EC002)
    KevalThakker(07EC043)
    Guided by- Assi. Prof. Hardik Bhatt
    Head of EC Dept.
    1
    Gandhinagar Institute of Technology - ECE 2011
  • 2. Why this project?
    Understand GPS hardware, Interface microcontroller circuit & associated software.
    Keen interest in the field of Satellite Network technology.
    Handy technology which can be used for human welfare.
    Implement the Satellite network technology for common use.
    Gandhinagar Institute of Technology - ECE 2011
    2
  • 3. Contents:
    3
    Gandhinagar Institute of Technology - ECE 2011
  • 12. Definition:
    • The device is the circuit that uses the Global Positioning System to determine the precise location of itself.
    • 13. It can determine the location of a vehicle (trains, trucks, cars etc.) to which it is attached and deliver the exact position of the same at regular predefined time intervals.
    4
    Gandhinagar Institute of Technology - ECE 2011
  • 14. GPS Basics
    Global Positioning System (GPS) is a satellite based navigation and position determination service.
    The U.S. military developed and implemented this satellite network as a military navigation system, but later made the network available for general public.
    It is a constellation of 27 Earth-orbiting Satellites (24 in operation and three spare in case one fails).
    Photo courtesy U.S. Department of Defense
    The GPS satellite constellation
    Gandhinagar Institute of Technology - ECE 2011
    5
  • 15. (cntd…) GPS Basics
    Each of these solar powered satellites(MEO satellites) encircles the globe at about 12,000 miles (19,300 km), making two complete rotations every day.
    The satellites of GPS system utilises 6 orbits separated by 60° with 4 satellites in each orbit. The inclination of each orbit is 55°.
    The orbits are arranged such that, at any time anywhere on Earth, there are at least four satellites "visible" in the sky.
    Gandhinagar Institute of Technology - ECE 2011
    6
  • 16. (cntd…) GPS Basics
    Each satellite transmits its own positional information in L band (1 – 2 GHz).
    A GPS receiver's job is to locate four or more of these satellites, figure out the distance to each, and use received information to determine its own location.
    This facility is provided free of cost. That means once the receiver is purchased, the technology is free to use.
    The operation of determining / calculating of its own position is based on a simple mathematical principle called trilateration.
    Gandhinagar Institute of Technology - ECE 2011
    7
  • 17. How GPS works?
    Step 4 :
    Once one know distance to a satellite, then he/she needs to know where the satellite is in the space.
    Step 3 :
    To measure travel time, GPS needs very accurate clocks.
    Step 5 :
    As the GPS signal travels through the Earth’s atmosphere, it gets delayed.
    Step 2 :
    To triangulate, GPS measures distance using the travel time of
    a radio message.
    Step 1 :Triangulation from satellites is the basis of the GPS system.
    Gandhinagar Institute of Technology - ECE 2011
    8
  • 18. Measurements of distance:how it works
    Distance measurement
    12,000 mi
    end: 0.06 s
    start: 0.00 s
    Gandhinagar Institute of Technology - ECE 2011
    9
  • 19. 2-D Trilateration
    Geometric Principle:
    You can find one location if you know its distance from other, already-known locations.
    30 Km
    Ahmedabad
    GIT can be anywhere on the - - circle
    centered at Ahmedabad.
    Gandhinagar Institute of Technology - ECE 2011
    10
  • 20. 2-D Trilateration
    15 Km
    Kalol
    30 Km
    Ahmedabad
    GIT can be either at one of two intersection points.
    Gandhinagar Institute of Technology - ECE 2011
    11
  • 21. 2-D Trilateration
    15 Km
    Kalol
    30 Km
    Ahmedabad
    Confirmed location of GIT at intersection of 3 circles.
    1 Km
    Khatraj
    Gandhinagar Institute of Technology - ECE 2011
    12
  • 22. Trilateration
    Given 1 satellite …
    13
    Gandhinagar Institute of Technology - ECE 2011
  • 23. …Trilateration
    We can locate our position on the surface of a sphere
    Gandhinagar Institute of Technology- ECE 2011
    14
  • 24. …Trilateration
    Given 2 satellites …
    Gandhinagar Institute of Technology - ECE 2011
    15
  • 25. …Trilateration
    Given 2 satellites …
    Gandhinagar Institute of Technology - ECE 2011
    16
  • 26. …Trilateration
    We can locate our position on the intersection of 2 spheres (i.e. a circle)
    Gandhinagar Institute of Technology - ECE 2011
    17
  • 27. …Trilateration
    Given 3 satellites …
    Gandhinagar Institute of Technology - ECE 2011
    18
  • 28. …Trilateration
    We can locate our position on the intersection of 3 spheres (i.e. 2 points)
    Gandhinagar Institute of Technology - ECE 2011
    19
  • 29. …Trilateration
    Given 4 satellites we can locate our position on the intersection of 4 spheres (i.e. 1 point)
    Gandhinagar Institute of Technology - ECE 2011
    20
  • 30. …Trilateration
    The point should be located on the earth’s surface
    Gandhinagar Institute of Technology - ECE 2011
    21
  • 31. …Trilateration
    The precise location is determined.
    Giving variables like Longitude, Altitude, Height and Time, etc.
    Gandhinagar Institute of Technology - ECE 2011
    22
  • 32. 3-D Trilateration
    1 Satellite
    2 Satellites
    3 Satellites
    23
    Gandhinagar Institute of Technology - ECE 2011
  • 33. How much ACCURACY we can get ???
    24
    This is not as simple as it looks !!!
    The question arises here is :
    “How much the measurement accuracy ??? “
    Is it ?
    Gandhinagar Institute of Technology - ECE 2011
  • 37. Block Diagram:
    GPS Module
    Regulated Power Supply
    LCD Display
    Memory
    Keypad
    Micro-Controller
    unit
    25
    Gandhinagar Institute of Technology - ECE 2011
  • 38. GPS MODULE:
    TOP VIEW
    BOTTOMVIEW
    26
    Gandhinagar Institute of Technology - ECE 2011
  • 39. Circuit Diagram:
    27
    Gandhinagar Institute of Technology - ECE 2011
  • 40. Working:
    The GPS equipment can be for on-line tracking or off-line tracking.
    It can be of “Logger” or “Pusher” or ”Puller” type.
    Suitable operating mode of GPS will be selected.
    The GPS module receives the information
    28
    Gandhinagar Institute of Technology - ECE 2011
  • 41. Continued..
    • Passes it to the controller unit at regular intervals.
    • 42. The controller extracts the required information and makes a packet out of it that consists of geographical data and other information.
    • 43. This data, being in coded form, is converted in the human understandable form.
    29
    Gandhinagar Institute of Technology - ECE 2011
  • 44. Continued..
    The coded form is nothing but the latitude, longitude, azimuth, elevation, Tilt, etc., wise location description of the vehicle being tracked, as per the selected mode.
    The controller will decode the information available from GPS module.
    At the end user gets the information by interfacing the GPS device to the PC or can display it on the LCD connected along with.
    Gandhinagar Institute of Technology - ECE 2011
    30
  • 45. FRAMES FROM SATELLITES
    In GGA mode the data packet received is as follows(format ,example):
    • $GPGGA,hhmmss.sss,ddmm,mmmm,a,dddmm.mmmm,a,x,xx,x.x,M,x.x,M,x.x,xxxx*hh <CR><LF>
    • 46. $GPGGA,035238.000,2307.1219,N,12016.4423,E,1,9,0.89,23.6,M,17.8,M,,*69
    • 47. By extracting UTC , Longitude, and latitude one can have the exact position of himself.
    31
    Gandhinagar Institute of Technology - ECE 2011
  • 48. GPS - MADE BETTER:
    Differential GPS is a technique that allows overcoming the effects of environmental errors and SA in the GPS signals to produce highly accurate position fix.
    This consists of a number of ground reference stations that monitor GPS satellite data.
    Master stations collect data from reference stations and creates a GPS correction message.
    Gandhinagar Institute of Technology - ECE 2011
    32
  • 49. Continued..
    The corrected differential message is then broadcast through one of the two geostationary satellites
    Gandhinagar Institute of Technology - ECE 2011
    33
  • 50. Continued..
    Development of satellite-based differential systems by various governments.
    These systems can give a position accuracy 5 times better, 95% of the time.
    Countries using such technologies:
    • WAAS  U.S.A.
    • 51. EGNOS  Europe
    • 52. MTSAT  Japan
    • 53. GAGAN  India
    Gandhinagar Institute of Technology - ECE 2011
    34
  • 54. Gandhinagar Institute of Technology - ECE 2011
    35
  • 55. POSSIBLE UPGRADATIONS:
    This on-line tracker can be upgraded to a real time off-line “Logger” type equipment by adding some external memory unit.
    It can also be transformed into a partial off-line “Puller” type or an advanced on-line “Pusher” type device by allow it to communicate with the controller.
    Gandhinagar Institute of Technology - ECE 2011
    36
  • 56. APPLICATION OF GPS
    • Science and research
    • 57. Commerce and industry
    • 58. Agriculture and forestry
    • 59. Tourism/sport Military
    • 60. Time measurement
    • 61. Tracking of any object
    • 62. Survey of land
    • 63. Communications
    Technology
    37
    Gandhinagar Institute of Technology - ECE 2011
  • 64. Real Time Application:
    Currently used in :
    • Navigation series mobile
    phones/accessories
    • “MANAN CABs in
    Ahmedabad.”
    • Study the locomotion
    of some animal/bird.
    • Universal clock.
    38
    Gandhinagar Institute of Technology - ECE 2011
  • 65. Future scopes:
    • Major domestic bus
    travelling companies.
    • 108 Ambulance
    (Emergency services)
    • High way security
    Projects.
    • Personal following.
    • 66. Pet tracking.
    • 67. Many more…
    39
    Gandhinagar Institute of Technology - ECE 2011
  • 68. That’s all
    THANK YOU.!!
    QURIES.??
    (If Any)
    40
    Gandhinagar Institute of Technology - ECE 2011