28-07-2011, 03:30 PM
Abstract
The auto-braking system was designed by VHDL
and fabricated to keep a distance. It provides pre-crash safety
system for intelligent car. This module can detect the distance
between front vehicle and your vehicle to keep a constant
distance using a sensor and operate the brake system forcibly if
the driver does not decrease the speed of car. The system
displays the distance between the two vehicles and the speed of
your vehicle. The performance of the system was good.
Keywords-component; auto-brakeing system, VHDL, precrash
safety, intelligent car, vehicle
I. INTRODUCTION
An automobile has been used to move human beings or
something since the automobile was invented and the
automobile technology has been developed within the last
few years. Recently, the automobile is thought as daily
necessaries because we spend much time in an automobile
and enjoyed the entertainment such as game, e-mail, DVD,
mp3, and internet etc. in the car. In nowadays, the intelligent
car with adaptive cruise control, lane keeping technology,
auto-parking system, Tyre Pressure Monitoring System
(TPMS), and prevent pre-crashing system has been
equipped because we need the convenient and intelligent car
[1-3]. These new automobile technologies are made possible
by the development of semiconductor technology, optical
technology and software technology.
The use of electronic components in automobiles is set
to accelerate and with ongoing efforts to improve safety and
comfort. 250 electronic components are used in a car, for
example, 50 MCUs are used in a car. Therefore, car makers
in Europe and Japan are developing for safety such as both
collision safety and preventive safety and new car
technology for intelligent car such as intelligent transport
system (ITS), rear view camera system, Road-to-vehicle and
Inter-vehicle Communication Systems, auto-parking system,
hybrid car, electric car, and hydrogen fueled car [4]. In
addition, some vehicle networks will enter commercial use,
such as the FlexRay interface instead of CAN bus for
onboard local area network (LAN), which supports highspeed
transfer, and MOST (media oriented systems
transport) or IDB-1394, which can move multimedia data,
that is audio and video signals, from multiple camera
systems or multimedia devices, such as DVD, navigation
system, mp 3, TV tuner, and CD changer etc. at once. Car
makers are also beginning to develop equipment for highend
vehicles with systems to sense roadway conditions
using cameras, radar, sensors and such in an effort to avoid
accidents. The reason is that the traffic accident is
increasing as automobile production has been increasing. It
is important to prevent accidents and to protect the driver
and pedestrian when accidents were occurred. Therefore,
pre-crashing system will be demanded. The pre-crash
system is to prevent front-end, rear-end, right-turn and leftturn
accidents on roads with poor visibility by using sensor
network to find invisible vehicles, which are to be detected
by autonomous on-vehicle sensors. The pre-crashing system
is processing the sensor data and controlling the vehicle to
prevent front-end, rear-end accidents and accidents caused
by careless driving. The development of such systems to
automatically control vehicles and avoid accidents will
accelerate in the future.
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