This document describes a vehicle accident reporting system that uses a MEMS accelerometer sensor and GSM modem. When an accident occurs, the MEMS sensor detects abnormal movement and sends a signal to a microcontroller. If movement does not return to normal within a set time, the microcontroller instructs the GSM modem to send an SMS alert about the accident to emergency responders. The system is intended to automatically report vehicle accidents on highways. It consists of an LPC2129 microcontroller interfaced with an accelerometer sensor, ADC, GPS module, GSM modem, and power supply.

1. GSM based road vehicle accident report system in highways using MEMS sensor
TELECOMMUNICATION 2014-15 Page 1
GSM BASED ROAD VEHICLE ACCIDENT
REPORT SYSTEM IN HIGHWAYS
USING MEMS SENSORS
Aim:
The purpose of this project is to design and develop a Vehicle Accident Report
System in highways. The vehicle accident is detected using a MEMS sensor and reported
using a GSM Module
Abstract:
This project focuses on developing an embedded system to report information
regarding road vehicles accidents on highways automatically using MEMS and GSM
modem.
The project consists of LPC2129 based micro-controller interfaced ADC, MEMS
accelerometer sensor and a GSM Modem. The MEMS (Micro Electro Mechanical
System) which consists of a 3-axis accelerometer which gives output based on three axis
movement.
This setup is fixed on the road vehicles and during normal movement (X-axis),
the accelerometer output is nearly constant. When any accident occurs the MEMS sensor
gives unbalanced or high axis output value (depends on vehicle position), and then the
microcontroller reads the value and expects for the normal movement output value again
on same axis (X-axis).
If the output is not returning back to normal value within the specific time then
the microcontroller commands the GSM modem and send a SMS to any predefined
numbers such as ambulance or police or any other numbers to intimate the accident.

2. GSM based road vehicle accident report system in highways using MEMS sensor
TELECOMMUNICATION 2014-15 Page 2
Block Diagram:
Hardware Required:
1. LPC2129 Micro-Controller Board
2. Accelerometer MEMS Sensor
3. ADC
4. GPS Module
5. GSM Module
6. Regulated Power Supply
Software Required:
1. Keil -Vision 4
2. Philips flash utilities
ARM7
Micro
Controller
MEMS
Accelerometer
Sensor
ADC
GSM
Module
GPS
Module
Regulated
Power
Supply