An idea of a smart gate which allows vehicles inly with specified RFID tag.

1. SMART Gate
Team Members :
Srinivas R Bhat
Saumil Jariwala
Pavithra Siddhananthan
Sri Harsha Aditya
Chaitanya
Instructor: Nitesh Parab

2. Project objective:
Designing a smart gate which enhances security
using RFID technology.

3. Overview
• Entry of particular vehicles inside a company/parking boundary is what we desire to
achieve using the Smart Gate concept.
•For this RF id (Radio Frequency identification) technology is chosen as the
authentisizer.
•A vehicle which needs to enter must be equipped with a RFid Tag in order to enter
the desired parking area.
•The system designed has pneumatic actuation controlled by a small scale automation
PLC.

4. Energy, Information Mass Flow Diagram

5. Pneumatic Circuit

6. Pneumatic Circuit
•It consists of a pneumatic motor – a motor which converts pneumatic pressure into
rotational motion.
•The direction of rotation of motor can be controlled by the solenoid actuated spring
return DCV which is a 3 by 5 valve as shown in the figure.
•To control the rotation speed inlet Throttle valves are used.
•This two direction rotational motion can be effectively coupled with mechanical gear
system for opening and closing of any kind of gate as per consumer requirement.
•The source of energy for the pneumatic motor is electricity powered air compressor.

7. Electrical Circuit

8. Electrical circuit •The controlling part is done by the PLC.
•The information from the Field is fed to the
PLC module as per the electrical circuit shown.
•There are sensors, push buttons , limit switches
in the input side.
•The output side contains solenoid coil of the
DCV and a lamp for process indication.
•This is the Control circuit of the system and
24V DC and 0V DC are the two logic levels.
•The circuit helps in writing the PLC logic for
the system.

9. Displacement Step Diagram

10. Programming Logic Control

11. PLC
•The logic control can be done by various ways as we know.
•Here for efficient automation Programmable Logic controller is used. This enables us
to efficiently code the logic into the system and makes the system more compact and
energy efficient.
•We have chosen LOGO! PLC from Siemens which is meant for Small scale
automation.
•It has 8 digital Input and Output ports which is sufficient for desired application.
•LADDER logic is used to code the PLC.

12. Possible Malfunctions
•Power Supply of the control unit may be damaged.
• Sensors may not sense the field conditions properly.
•Problems in the actuators or compressors.
•Valves might be damaged.
•Mechanical obstruction in the path of the Gate.

13. Trouble Shooting
•Check the Power Supply to the compressor, control unit ,and the pneumatic pressure
output.
•Use the Displacement step diagram to understand the steps.
• There are manual switches provided in the panel to operate the gates.
•Each sensor outputs are to be verified using multimeter after each steps in the
displacement step diagram.
•If OK then the actuators must be checked for the respective function.

14. Bill Of Materials
Rs. 13000

15. BOM
The BOM is not fixed as there is vast choice of product is possible .We haven’t
considered the type of gate and hence it is the choice of the consumer .Based on the
type of gate required gear system may differ but we have listed all the minimum
necessary components required.

16. Possible modification
The whole system proposed is now pneumatically actuated .With the same sensor
setup and a slight modification in PLC program one can use electrical DC motors in
place of pneumatic motor. A simple H-bridge relay setup can be used to change the
direction of rotation of motor. Speed control can be achieved by set of gears.

17. Questions ????

18. THANK YOU