SELF PARKING CAR

HOW A SELF PARKING CAR WORKS?
The self parking car sensor works on the principle of echo. The car to be parked using the self parking technique is taken into the parking lot and the system for self parking is started by pressing a button. It then starts searching for a parking space. Whenever there’s a car besides it, it senses it and keeps on moving forward until it finds an empty space. When it does, a counter placed in the system starts counting till the dimensions of the car and keeps sensing the output at every fourth step. If no obstacle is found till it completes counting for the dimensions of the car, then the counter is reset back to its initial value and the parking process starts. The left wheel becomes stationary and the right wheel starts reversing at 90 degrees. It then moves back and parks the car.

The ultrasonic transmitter used here is operated at 40Khz with nearly 50% duty cycle. The frequency is generated using IC 555 in astable mode. The output is given to an ultrasonic transmitter.

The reciever is used to detect the reflected sound. The output of an ultrasonic transducer is given to the input of a non inverting amplifier with a gain of 221. The amplified signal is then given to the rectifier which rectifies the amplified sound wave. The RC filter is connected in cascade with the rectifier. The RC filter has time constant RC greater than 1/40k sec=2.5*10-5 sec. the output of RC filter is a stable DC voltage which is then given to a comparator which gives 1 as an output when an object is detected and 0 when no object is detected.

.FUTURE SCOPE OF SELF PARKING CAR

The motto of our project is to let the sensors park the car so that the driver can sit back and relax while the sensors do all the work for him. Our project can however be modified to perform a huge variety of functions.
Many car manufacturing companies are coming up with a self parking system. In case of narrow roads there’s always a turning problem. The car driver faces great difficulty while taking a turn. In such a case our project comes handy. If certain modifications are made in the sensor program such that the car takes a full 180 degree turn instead of a 90 degree turn then this problem can be easily solved and turning the car becomes very easy.
Our model is designed to park in only one direction. It can however be designed to park in either direction. Another problem that can be overcome is “obstacle avoidance”. In this case the sensors can be programmed in such a way that if a car comes too close to our car then the sensors will detect its closeness and will automatically slow down our car to avoid any accident.