GSM Based Vehicle Theft Control System
It deals with the design & development of a theft control system for automobiles which is being used to prevent / control the theft of a vehicle. The developed system makes use of an embedded system based on GSM technology. An interfacing mobile is also connected to the microcontroller, which is in turn, connected to the engine.
Once, the vehicle is being stolen, the information is being used by the vehicle owner for further processing. The information is passed onto the central processing insurance system, where by sitting at a remote place, a particular number is dialed by them to the interfacing mobile that is with the hardware kit which is installed in the vehicle. By reading the signals received by the mobile, one can control the ignition of the engine; say to lock it or to stop the engine immediately. Again it will come to the normal condition only after entering a secured password. The owner of the vehicle & the centre processing system will know this secured password. We can modify this concept such that the vehicle owner also can lock the vehicle from his mobile phone.
The main concept in this design is introducing the mobile communications into the embedded system. With the help of SIM tracking knows the location of vehicle and informs to the local police or stops it from further movement.
The operation of this circuit mainly depends on the MEM sensor. The actual position of the MEM sensor should be 90 degrees with respect to ground. If there is any change in the actual position of the MEM a control signal will be given to the ADC. The ADC will convert the analog signal to the digital signal and it will send the digital signal to the micro controller.
Micro controller will send a signal to the GSM module. As GSM receives a signal from micro controller it informs the owner as "vehicle theft detected" through an SMS. When the owner receives the above message he will send a message to the GSM module to lock the engine. As the GSM receives a secret code from the owner it sends a signal to the micro controller and the micro controller will lock the engine. As this is a protocol we have shown the locking of the engine by glowing led.
After locking the engine, the owner can able to find the location of the Automobile by using the signals generated by GSM. After reaching the position where vehicle was locked, the owner enters an secret code to unlock the engine. In this way we can protect the vehicles. And we can also use this as a accident sensor.
A Micro controller consists of a powerful CPU tightly coupled with memory, various I/O interfaces such as serial port, parallel port timer or counter, interrupt controller, data acquisition interfaces-Analog to Digital converter, Digital to Analog converter, integrated on to a single silicon chip.
If a system is developed with a microprocessor, the designer has to go for external memory such as RAM, ROM, EPROM and peripherals. But controller is provided all these facilities on a single chip. Development of a Micro controller reduces PCB size and cost of design.
One of the major differences between a Microprocessor and a Micro controller is that a controller often deals with bits not bytes as in the real world application.
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