31-01-2013, 12:59 PM
CAR SPEED CONTROL USING BLUETOOTH
1CAR SPEED CONTROL.doc (Size: 895.5 KB / Downloads: 33)
INTRODUCTION
Bluetooth is a wireless technology standard for exchanging data over short distances(using short-wavelength radio transmissions in the ISM band from 2400-2480 MHz)
from fixed and mobile devices, creating personal area networks (PANs) with high levels of security. Created by telecom vendor Ericsson in 1994,it was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of synchronization.
To use Bluetooth wireless technology, a device has to be able to interpret certain Bluetooth profiles, which are definitions of possible applications and specify general behaviors that Bluetooth enabled devices use to communicate with other Bluetooth devices. These profiles include settings to parametrize and to control the communication from start. Adherence to profiles saves the time for transmitting the parameters anew before the bi-directional link becomes effective. There are a wide range of Bluetooth profiles that describe many different types of applications.
Some of the applications are –
• Wireless control of and communication between a mobile phone and Bluetooth compatible car setreo system.
• For controls where infrared was often used.
• For low bandwidth applications where higher USB bandwidth is not required and cable-free connection desired.
• Replacement of previous wired RS-232 serial communications in test equipment, medical equipment, bar code scanners, and traffic control devices. Etc..
So in this we are going to describe about a Bluetooth application for controlling the car speed.
Since Bluetooth devices are capable of communicating with eight other devices simultaneously we can monitor and check the speeds of up to eight cars simultaneously, thus preventing accidents. Thus if we have two Bluetooth enabled devices in two cars the devices automatically communicate with each other when they come in the range of up to 100 meters of each other. The range is dependant on the power class of the product. Power transmission rates vary in many Bluetooth devices depending upon the power saving features available in a particular unit, bandwidth requirements, transmission distance. The statistics of road accidents is tremendous and highlights the need for such a system.
OPERATION
Because of traveling at high speeds there is a possibility of having accident. The
Figure (2) shows that when two cars or more come within the distance of 10 km at high speed
there is a possibility of having accidents. The Bluetooth radio is a short distance, low power
radio operating in the unlicensed spectrum of 2.4 GHz and using a nominal antenna power
of 20 dbm.
AUTOMTIC BRAKE SYSTEM:
The automatic brake system is the next generation braking system for controlling the speed of the car. On receiving the control signal from the traveling car the computer inside the car manipulates the signal and gives control signal to the braking system.
There are four main components to an automatic braking system:
• speed sensors
• pump
• valves
• controller
CONCLUSION:
The Bluetooth technology is being widely adopted by the Industry leaders. The possibility for new applications is very exciting with this versatile technology. It provides a simple, logical answer to all the Problems-which is built a single common radio into every mobile computer, then neither do companies have to worry about WAN, nor do communi-cation companies need to worry about building external cables. The Bluetooth communication device will thus be a small, low powered radio in a chip that will talk to other Bluetooth enabled products. Bluetooth has been designed to solve a number of connectivity problems experienced by the mobile workers & consumers. Thus, this technology helps make the electronic devices more user friendly and helps address various other problems like accidents.