Navigation system for blind using GPS & GSM
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The document discusses a navigation system for blind people that utilizes GSM and GPS technologies to facilitate independent movement, obstacle detection, and temperature monitoring. Key components include ultrasonic and IR sensors for obstacle avoidance, along with GSM modules for two-way communication. While the system enhances mobility and safety, it has limitations such as bulkiness and sensitivity of certain components.
Navigation system for blind using GPS & GSM
- 1. Navigation System For Blind People Using GSM,GPS Techniques By, Aravind M.K Prajwal V Prasanna kumara G Prateek Anand
- 2. Introduction The system facilitates blind people to navigate independently without any external help. The system is linked with a GSM-GPS module to pin-point the location of the blind person and to establish a two way communication path in a wireless fashion. The system is equipped with obstacle sensors such as ultrasonic and IR sensor to alert the blind person . Temperature sensor is used to monitor the body temperature of blind person and alert via gsm module.
- 4. HARDWARE COMPONENTS: PIC16F877A Microcontroller. Ultrasonic sensor - Around 50cm ranged obstacle detection. IR sensor - around 5cm ranged obstacle detection. MEMS device – accidental shock indication. Temperature sensor (LM35) – Body Temperature detection . Color sensor (TCS3200) GPS Module GSM module(GSM 900) Buzzer
- 5. PIC16F877A Microcontroller : • 40 pin IC • 8 bit based on Harvard architecture. • 35 simple word instructions . • voltage range - 2.0-5.56 volts high sink or source capable of addressing 8K*14 bit program memory space.
- 6. ULTRASONIC SENSOR: • Detects obstacle around 50cm range. • operates between 25 kHz and 500 kHz. • 5v operating voltage.
- 7. IR Sensors • Used in module to detect obstacle in 5cm range. • An infrared sensor is an electronic device that emits and/or detects infrared radiation in order to sense some aspect of its surroundings.
- 8. COLOUR SENSOR (TCS3200 ): • A complete color detector, including a TAOS TCS3200 RGB sensor chip and 4 white LEDs. The TCS3200 can detect and measure a nearly limitless range of visible colors. • TCS3200 has an array of photodetectors, each with either a red, green, or blue filter, or no filter (clear). • which produces a square-wave output whose frequency is proportional to the intensity of the chosen color.
- 9. TEMPERATURE SENSOR (LM35) : • Calibrated directly in Celsius • 0.5 degree Celsius accuracy . • Rated for full -55*C to 150*C. • Operates from 4V to 30V. • Low impedance output ,0.1Ω for 1 mA Load.
- 10. MEMS Sensor • Detects the accidental shocks. • contains micro-circuitry on a tiny silicon chip into which some mechanical device such as a mirror or a sensor has been manufactured.
- 11. GSM SIM900 • Delivers GSM/GPRS 850/900/1800/1900MHz performance for voice, SMS, & Data. • Quad - band GSM/GPRS module with a size of 24mmx24mmx3mm. • Dimensions: 24* 24 * 3 mm. • Control via AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands). • Supply voltage range 3.4 ... 4.5 V.
- 12. GPS module Skynav SKM58 • Accuracy - 3.0m • Center frequency - 1575 ± 3 Mhz • Bandwidth - 10MHz min • Polarization – RHCP • Operational Limits Altitude – max 18,000m. velocity- max 515m/s. • VCC - 3.0-4.2 V.
- 14. SIMULATION Project simulation is done using software LXK Proteus 7.6 SP0 v2.0.1
- 15. ADVANTAGES, LIMITATIONS ADVANTAGES • The system enables the blind people to move with the same ease and confidence as sighted people. • Since the system is linked with the GSM and GPS module it provides the direction information. • Avoid the obstacle based on ultrasonic sensor • Facilitates the easier communication in case of emergency. LIMITATION • It is bulky to carry. • MEMS device being very sensitive it may send faulty message during accidental cases . • Requirement of power source.