In recent decades, there has been a great evolution in industrial automation and control systems. PLC plays a lead role in the automation of such industrial units and setups. Our SDP lies in Control where we are using a Programmable Logic Control (PLC) with a human interface to automate the Car Wash
automatic car wash process
In recent decades, there has been a great evolution in industrial automation and control systems. PLC plays a lead role in the automation of such industrial units and setups. Our SDP lies in Control where we are using a Programmable Logic Control (PLC) with a human interface to automate the Car Washing system. We are devising a treatment process in which a car goes through multiple processes until it is cleaned properly. We will reduce the space coverage and energy requirement with low operational cost, making a compact model
PLCs play an important role in this era of automation with effective inputs and efficient outputs we can assure the best possible results with low power consumptions, low operational and maintenance cost, and accuracy. Proper timing will assure time saving and effective washing adjusting the angles of nozzles pouring water and detergent liquids.
The automatic car wash system is used to wash cars efficiently without damaging the paint finish of a car. By the method to be proposed, we will like to achieve high accuracy and flexibility. The system will require less power consumption, less running cost, and will require less physical space to be implemented.
The whole washing process will complete by passing through four major controlling process :
Infrared inductive sensors will be used to know about the presence of car. These sensors will send signal to PLC to get operational.
When the car is detected, the task of washing the car will start. A solenoid pump will be used to pump liquid from reservoir to needed station using pipe.
The most system consists of an overhead rail trolley mechanism, carrying the angled nozzle structure over the roof of the car. The mechanism will move, driven by AC motor, taking trips back and forth performing the washing mechanism by throwing water and soap solutions.
Fans will be used to perform drying mechanism of car, once the washing procedure is completed.
Parts of machine and its functions:
IR sensors:
They will be placed on the platform above which the car will be parked.
Rail Trolley Mechanism:
It will move carrying the nozzle and washing the car after getting operated by PLC.
It wil take first trip and spray soapy water over car. In second trip it will spray soap. In last trip it will spray clean water over car.
A 3D model of Rail trolley mechanism is shown below.

Blue represents The top of a trolley will which move the structure over the length
of car.
Brown represents Nozzle carrier, that will carry the nozzle over the car from left to
right.
Green represents our nozzle which will spray liquid.
Drying Mechanism:
Exhaust fans, attached to the sidewalls, will be used to perform drying operations.
Explanation:
At the start, the IR sensors placed on the platform above which the car will be parked sense
The presence of the car and gave the signal to PLC which will operate the water pump to spray the clean water at bottom of the car.in the next section the rail trolly system moves on the top roof of the car and firstly sprayed clean water then detergents and at the end again spray the clean water .at the last section fans throw the hot air on the body of the car in order to dry it.
In this project, we will use steel structure for almost the entire prototype. There are three main parts of our prototype Rail moving mechanism, nozzle carrier, and at last nozzle angle. Smooth material must be used to move the rails and then we’ll need a servo motor to turn the nozzle carrier 90 degrees when it reaches the corners of the rail. Finally, the nozzles would be adjustable to control the pressure moreover they would be put at a highly precise angle for the proper cleaning. Straight showers to a car’s body may cause damage and scratches so the nozzles need to be tilted and those which to wash the car’s bottom must be placed so as to have a thorough cleaning. The detergents used will have their pH value and chemical composition tested assuring zero damage to the car’s paint.
| Item Name | Type | No. of Units | Per Unit Cost (in Rs) | Total (in Rs) |
|---|---|---|---|---|
| Delta PLC | Equipment | 1 | 16000 | 16000 |
| Communication cable | Equipment | 1 | 2000 | 2000 |
| IR sensors | Equipment | 2 | 500 | 1000 |
| servo motor | Equipment | 1 | 3000 | 3000 |
| DC motor | Equipment | 1 | 2500 | 2500 |
| AC motor | Equipment | 1 | 4000 | 4000 |
| Water lamp | Equipment | 2 | 2000 | 4000 |
| Air compressor | Equipment | 1 | 4000 | 4000 |
| water tanks | Equipment | 2 | 1000 | 2000 |
| nozzles | Equipment | 20 | 150 | 3000 |
| pipes | Equipment | 20 | 100 | 2000 |
| LED lights | Equipment | 2 | 500 | 1000 |
| Circuit breaker | Equipment | 1 | 500 | 500 |
| Rolling rail | Equipment | 1 | 5000 | 5000 |
| Car(toy) | Equipment | 1 | 2000 | 2000 |
| Overload relay | Equipment | 1 | 1000 | 1000 |
| connecting wires | Equipment | 1 | 500 | 500 |
| miscellaneous | Miscellaneous | 10 | 1000 | 10000 |
| Total in (Rs) | 63500 |
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