Multipoint wireless data acquition system for vehicles--Explanation continued..

7. Flex Sensor

                          It is a unique component that changes resistance when bent. An un-flexed sensor has a nominal resistance of 10,000 ohms (10 K). As the flex sensor is bent in either direction the resistance gradually decreases.
Sensor is also pressure sensitive, and may be used as a force or pressure sensor
The flex sensor operating temperature is -45F to 125F.

8. Accelerometer

                            This is basically a 3 axis sensor which will be able to sense the tilting of the car or vehicle. The ADXL335 is a small, thin, low power, complete 3-axis accelerometer with

signal conditioned voltage outputs. It Basically consists of a 3-Axis Sensor which can sense the postion of that current circuit, taking out its x-axis y-axis and z-axis co-ordinates.Acciendent of a car is not always said to be happened if the car is banged but it might happen that the car is tilted or went completely upside down.so for that reason this Sensor is used.

9. GPS
    

   In this project GPS is used for locating and tracking the vehicle. The GPS module calculates the geographical position of the module. This helps in detecting the location/position of the module. G-Mouse is a total solution GPS receiver, designed based on the most high sensitivity first GPS kernel architecture. This positioning application meets strict needs such as car navigation, mapping, surveying, security, agriculture and so on. Only clear view of sky and certain power supply are necessary to the unit. It communicates with other electronic utilities via compatible dual-channel through RS-232 or TTL and saves critical satellite data by built-in backup memory. With low power consumption, the G-Mouse tracks up to 8 satellites at a time, re-acquires satellite signal in 1 sec and updates position data recovery second.4 power-saving mode allows the unit with ultra-low power request.