03-09-2014, 12:51 PM
Locking and Unlocking of Theft Vehicles Using CAN
Locking and Unlocking.pdf (Size: 792.09 KB / Downloads: 61)
Abstract
Avoiding Vehicle Theft is making buzz in present
automobile industry. Design and development of a theft control
system for an automobile, can be achieved by making use of GPS
feature of mobile phone. The developed system makes use of an
mobile phone that is embedded in the vehicle with an interfacing
to Engine Control Module(ECM) through Control Area Network
(CAN) Bus, which is in turn, communicated to the ECM. The
vehicle being stolen can be stopped by using GPS feature of
mobile phone and this information is used by the owner of the
vehicle for future processing. The owner sends the message to the
mobile which is embedded in the vehicle which has stolen which
in turn controls the vehicles engine by locking the working of the
engine immediately. The developed system accept the message
and broadcasted to the Vehicle Network through CAN Bus. The
engine can be unlocked only by the owner of the vehicle by
sending the message again. The goal behind the design is to
develop security for vehicles and embedded system to
communicate with engine of the vehicle.
INTRODUCTION
Today’s Automobiles, invariably comply with digital
control systems as a consequence of constant growth in
technology. Recent Vehicles contains large number of
Electronic Control Systems and already there are large
numbers of Electronic Control Units present [1]. The growth of
automotive electronics is the result parties of the customers
wish for better safety and greater comfort and also for other
requirements like improved emission control and reduced fuel
consumption.
Electronic Control Units (ECUs) are increasingly being
deployed in automobiles to control one or more electronic
subsystems to realize various functions .When someone drives
a car there are many signals that are passed between the various
CONTROLLER AREA NETWORK (CAN) BUS
Controller Area Network (CAN) is a serial data
communications bus for real-time applications, developed by
engineers at Bosch [5]. Evaluated existing serial bus systems
regarding their possible use in passenger cars and found that
none of the available network protocols were able to fulfill the
requirements of the automotive applications in 1980’s. CAN is
based on the “broadcast communication mechanism”, which is
based on a message-oriented transmission protocol. The
Controller Area Network (CAN) is used in a broad range of
embedded as well as automation control systems. Application
of CAN includes in the area of CAN in cars & Truck Engine,
Maritime Applications, Avionics System Networks, Building
Automation etc
CAN Principle
CAN is based on the “broadcast communication
mechanism”. This means that all nodes can "hear" all
transmissions. There is no way to send a message to just a
specific node; all nodes will invariably pick up all traffic. The
CAN hardware, however, provides local filtering so that each
node may react only on the interesting messages. Therefore,
CAN is based on a message-oriented transmission protocol.
Every message has a message identifier, which is unique
within the whole network since it defines the priority of the
message. The basic system of CAN in any vehicles is shown
PROPOSED SYSTEM
Commercially available anti-theft vehicular systems are very
expensive. The paper act towards with the design &
development of a Theft Control System for an automobile,
which is being used to prevent or control the theft of a vehicle.
The developed system makes use of an embedded system and n
GSM /GPS technology. The proposed system, installed in the
vehicle can be easily controlled by the owner of the vehicle by
sending a message from his/her mobile to the vehicle engine by
interfacing with CAN bus and GSM modem.
Once, the vehicle is being stolen, the information is being
used by the vehicle owner for further processing, where by
sitting at a remote place, a message is sent to the interfacing
GSM modem that is interfaced with the ECU which is installed
in the vehicle. By reading the signals received by the mobile,
the engine is locked automatically and speed of the vehicle
reduced to zero. Again it will come to the normal condition
only after entering a secured password by the owner of the
vehicle.
DESIGN & DEVELOPMENT OF TCU
The block diagram of the proposed system is as shown in
Fig. 3.The design & development of the proposed system
carried out in two modules, first the design of module to
retrieve the location and second module to control the vehicle
engine by either to lock or unlock the engine by sending
ON/OFF message from the user to the Theft Control Unit. Fig.
3 accomplishes the various control units of the vehicles are
connected to one another through CAN Bus. The Theft Control
Unit locks/unlocks the vehicle engine by sending text message
through mobile to CAN Bus from the owner’s mobile through
GSM
EXPERIMENTED RESULTS
The results are obtained after carrying out the
experimentation by using the following hardware components.
The component includes Android Based Phone, ARM
Controller, Relay Circuit, GSM Module, and LCD Display.
Fig. 6 shows ARM Controller, Relay circuit, GSM Module
and LCD Display are interfaced on a single board and
embedded on single board which is embedded to a vehicle as a
control unit. The relay is connected to the Vehicle Engine Unit
of the Automobile.
CONCLUSION
The Proposed System Theft Control Unit can be
implemented in any automobiles as one of the vehicle’s
electronic control unit which will be connected to the CAN Bus
as one more node. The developed system is less expensive
vehicle tracking control system that could be implemented on
any vehicle since the system is developed by using mobile and
GSM technology which is operated by sending and receiving
messages. The vehicle engine ignition system can be controlled
by reading the message received.