[pic] BLUETOOTH APPLICATION
In the current scenario the world is plagued by accidents which are primarily due to human errors in judgment and hence thousands of lives are lost. These accidents can be avoided if only there was a mechanism to alert the driver of approaching danger. This can be done by monitoring the distance between nearby cars and alerting the driver whenever the distance becomes too short. This is precisely the aim of this paper. In this paper we propose the use of Bluetooth Technology by which we can check the speed of the car whenever it comes dangerously close to any other vehicle up front, thereby saving very many lives.
2. ROAD ACCIDENT STATISTICS
4. AUTOMATIC BRAKING SYSTEM
5. REPRESENTATION OF OUR IDEA
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. The following is a statistic on the number of road accidents occurring each year.
ROAD ACCIDENT STATISTICS OF INDIA 1970-2003
| | | | | | | | |Sl.No. | |Source: Data received from States/UTs. |
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 speeds 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.
At the 20 dB the range is 100 meters, meaning equipment must be
Within 100 meters to each other (about 328 feet) to communicate using the
Bluetooth standard. With the help of this technology we can send data to the eight
devices. The group of eight devices is known as piconet. Here we have a piconet and a scatternet, in the piconet M is the master and S1 to S7 are the slaves [pic]
Radio communication is subjected to noise and interference, as the 2.4 GHz frequencies are shared between the all device in piconet. So the Bluetooth specification has solved this problem by employing what is called as spectrum spreading, in which the Bluetooth radio hops among different frequencies very quickly. There are 79 hops starting at 2.402 GHz and stopping at 2.480 GHz, each of which is displaced by 1 MHz. The Bluetooth avoids interference by hoping around these 79 frequencies 1600 times per second. So in order to avoid it we use bluetooth equipped car, in which each car have bluetooth transmitter and receiver. And the every car should have mini computer to monitor the relative position of the car with the other car.
When any car comes close together bluetooth device...
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