The Li-Fi is the newest technology in the Field of wireless communication. Nowadays so many people are using internet to fulfill their task by using wired or wireless technology. When the number of users is increases then rate of data transmission in the wireless network gets automatically decreases
Automatic toll collection system using light fidelity
The Li-Fi is the newest technology in the Field of wireless communication. Nowadays so many people are using internet to fulfill their task by using wired or wireless technology. When the number of users is increases then rate of data transmission in the wireless network gets automatically decreases is proposed. Li-Fi uses LED light bulbs similar to those currently in use in many energy-conscious homes and offices. The high-speed wireless communication technology is uses visible light (presently using LEDs) to transmit information. Automatic Toll collection system has reduced the heavy congestion caused at toll collection in the metropolitan cities. As the population is increases day by day this results into high traffic congestions on road. Most of the people find it difficult to be a part of long queue at toll for toll collection system. This causes high fuel consumption while waiting for a payment, which is going to extinct in coming years. The given project is providing a great solution to this problem. Li-Fi is emerging technology in today’s era. Here, we are using the power of Li-Fi for wireless communication to transmit user information from vehicle to toll plaza. Every vehicle will be having a microcontroller and a memory connected to it. In addition, the setup will be used to send useful encoded data like vehicle number via LED. The Li-Fi receiver (Admin) is present in middle of road at tollbooth. An intelligent processor will be there at receiver side, which will automatically process the toll tax payment according to the type of vehicle through a wallet linked with vehicle number. The technology will be helpful in preserving the fuel consumption of vehicle and will create an eco-friendly environment.
This project focuses on faster data transmit at toll plaza by using Li-Fi module which will reduce the problems that arise in ETC by RFID tags and manual toll collection. In world of wireless technology, the numbers of devices access the internet growing by a second most of the devices use wireless communication access internet for sharing data between devices, this has a led to an increase in network complexity, shortage of wireless radio bandwidth and an increased risk of interference of radio frequencies put limitation on radio frequency which is used in Wi-Fi (Wireless Fidelity). The main principle of this technology is transmitting the data using light illumination by using light emitting diodes. In Li-Fi based system we analyze its performance with respect to existing technology. To enjoy high data transfer rates we use of Li-Fi and also for relieving radio interference issues. Li-Fi technology is the future of high speed data transmission. So we use this Li-Fi technology for communication is when a message flows from sender to receiver only, thus providing no feedback. This is user friendly system. Purpose of this system to use advance technology to make digital world.ETC required difficult implementation process as they use radio frequency so they need a proper setup. More it is high is in security as data don’t disperse and cannot access by any other user. After implementing this concept, government will get many from toll collection system.
In order to design the system, the “Line of sight” between receiver and transmitter is required to send the data. LIFI uses visible light communication or infrared and nearUV spectrum waves, which can be achieved by using LED (light emitting Diode). There is requirement of transmitter as well as a receiver so as to achieve the concept of wireless communication system, as the LIFI refers to the Light fidelity which is also a wireless communication system and it will transmit data using Electromagnetic wave(Light) therefore it requires a transmitter circuit and receiver circuit. Here, Vehicle is acting as a transmitter because the transmitter circuit i.e. LED and intelligent controller is connected with the vehicle’s Power system. As the vehicle is having the 12V battery to power the Electronic components present in the vehicle, also this power will be given to the transmitter circuit.On the receiving end there will be a photo-detector to sense the change in light transmitted from LED, and so as to meet the requirement of “Line of sight” we are connecting the receiver circuit on the Road just under the car.Data or Information of the user stored in the memory attached with the microcontroller, memory will contain the vehicle number, personal identification number and payment gateway password.Microcontroller is an intelligent device which is able to process user’s commands and gives the relevant output. Microcontroller will process the algorithm of sending the data from memory to LED in modulated form.
During uplink and downlink setup of LIFI there is an “Interference” of sunlight with LED light. Sunlight is having a luminous value comparable to high intensity LED, which vary in the range of 1000-2000 Lux. This problem can be resolved by placing the array of LED under the vehicle, which will also resolve the problem of “Line of sight”. Since, under the vehicle the luminous value is relatively low which prevents the unwanted interference of LED with sunlight. Array of LED is there to transmit the information to toll for payment.
Shows the receiver block diagram with the five major components i.e. photodiode, amplifier, microcontroller, memory and billing system. The photodiode will receive the information sent by LED in form of current pulses. The strength of the signals will decrease as it travels through air, so as to convert these weak current pulses into equivalent voltage pulses we need to amplify these signals by transimpedance amplifier. The amplified signal requires a signal processing element which is a microcontroller. Data will forwarded to microcontroller for further processing, comparison of received data with existing database takes place, payment for toll, and notification regarding toll deduction will be sent to user via SMS. 
The proposed system uses the Li-Fi modules, it possesses several advantages mentioned below:
The growth in number of vehicles, we need for expansive roads catering to thousands of vehicles moving across has become inevitable. However, considering the present situation of the current toll system has several drawbacks. The traffic congestion is increasing day by day. Most of the people find it difficult to be a part of long queue at toll for toll payment. This causes waste of petrol and diesel in large amount which are going to extinct in coming years. This project provides a great solution to all these problems. LIFI is emerging technology in the trend. This technology helps to create an ecofriendly environment.
Problems with existing system:
Benefits of LI-FI:
Capacity: Li-Fi spectrum is 10,000 times greater.
2. Availability: Light waves are available everywhere.
3. Efficiency: Highly efficient as LED bulbs consume very less energy.
4. Security: Highly secure as light waves cannot penetrate through walls.
This system can be implemented overall the world but undeveloped countries (e.g pakistan) can adopt this method as it is feasible for them, to become smarter, modren and technical country to join the technical path along the world.
purpose:
The main purpose of this project is to headway the old manual toll collection replace with something modern feasibe system as this system causes many problems(fuel consumtion(many problems aris due to fuel e.g envirenmental pollution etc), time wastage, wrong computations absconders etc) which is very common but almost ignored.
The Li-Fi based Toll Collection system, a design scheme was put forward. It is high security, far communication and efficiency, etc. It not improves the passage ability of expressway but also improve the technology level of charge. Toll collection system using Li-Fi is an effective measure to reduce management costs and fees, at the same time, greatly reduce noise and pollutant emission of toll station. In the design of the proposed toll collection system, real time toll collection and anti-theft solution system have been designed. This will reduce the manual and delays that often occur on roads. This system of collecting tolls is ecofriendly and also it will have increased toll lane capacity. And also an anti-theft solution system module which prevents passing of any defaulter vehicle is implemented, thus assuring security on the roadways.
| Item Name | Type | No. of Units | Per Unit Cost (in Rs) | Total (in Rs) |
|---|---|---|---|---|
| Microcontroller | Equipment | 2 | 3000 | 6000 |
| LCD module | Equipment | 2 | 1500 | 3000 |
| I2C Module for LCD | Equipment | 2 | 1700 | 3400 |
| Amplifier Circuit | Equipment | 1 | 1400 | 1400 |
| Multimedia Module | Equipment | 1 | 2460 | 2460 |
| Data receiver Module | Equipment | 1 | 1740 | 1740 |
| Transmitting Module | Equipment | 1 | 1800 | 1800 |
| Power supply | Equipment | 2 | 1600 | 3200 |
| Connecting wires | Equipment | 9 | 80 | 720 |
| Step down transformer | Equipment | 2 | 2000 | 4000 |
| Capacitors | Equipment | 8 | 195 | 1560 |
| Encoder | Equipment | 1 | 1300 | 1300 |
| Decoder | Equipment | 1 | 1320 | 1320 |
| Silicon glue | Miscellaneous | 6 | 440 | 2640 |
| Soldering iron | Miscellaneous | 1 | 870 | 870 |
| Soldering paste | Miscellaneous | 1 | 700 | 700 |
| Glue gun | Miscellaneous | 1 | 900 | 900 |
| Drawing board as base of project | Miscellaneous | 2 | 500 | 1000 |
| LED | Equipment | 2 | 7500 | 15000 |
| Photodiode | Equipment | 1 | 4000 | 4000 |
| Transimpedance | Equipment | 1 | 2700 | 2700 |
| Memory/hard disk | Equipment | 2 | 5000 | 10000 |
| Total in (Rs) | 69710 |
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