1. LEVEL CONTROL USING ULTRASONIC
(CHENNAI PETROLEUM CORPORATION LIMITED)
INTERNAL GUIDE
MS. VIJAYALAKSHMI
(LECTURER OF ICE DEPARTMENT)
EXTERNAL GUIDE
MR. GOWTHAMAN
MR. SARAVANAN
(DESIGN ENGINEER CPCL)

2. ABOUT CPCL Cpcl extracts various products from crude oil
like lpg, petrol, asphalt,kerosine, naptha,etc.,
nearly 200 by-products.
we were completed our project in the oms
department cpcl.

3. TOTAL PROCESS PLC ASPHALT STORAGE FROM TANK REACTOR TEMPERTURE COIL
LEVEL SENSOR
TEMP SENSOR
ASPHALT
FROM
REACTOR
STORAGE
TANK
BYE PASS
VALUE
TRANSPORTATION
TO VARIOUS
PLACES
TEMPERTURE
COIL
VALUE
STREAM FROM
BOILER

4. WORK DONE IN THE OMS DEPARTMENT
Level measurement in the storage tank using ultrasonic
Temperature measurement in the storage tank
Inputs are given to the plc, and the conditions are checked to transport the asphalt corresponding values are controlled using plc

5. BASIC PRINCIPLE OF ULTRASONIC
Ultrasonic Transmitter Transmits The High
Frequency Sound Energy Corresponding To
The Applied Electrical Energy. The Sound
Waves Are Incident On The Target Surface
And Part Of The Wave Reflected.

6. BASIC PRINCIPLE OF ULTRASONIC
The Reflected Waves Are Received By Ultrasonic Receiver.
By Measuring The Time Between Transmitting And
Receiving The Ultrasonic Wave We Can Calculate The
Distance Between The Transmitter And Target

7. LEVEL MEASUREMENT USING ULTRASONIC
GENERAL BLOCK DIAGRAM

8. LEVEL MEASUREMENT USING ULTRASONIC
BLOCK DIAGRAM
ULTRASONIC TRANMITTER
OSCILLATOR
SENSOR DRIVE CKT
ULTRASONIC
TRANSMITTER
TOWARDS THE OBJECT

9. BLOCK DIAGRAM SIGNAL ULTRASONIC DETECTION AMP RECEIVER CIRCUIT TIME
ULTRASONIC RECEIVER
SIGNAL
AMP
CIRCUIT
DETECTION
TIME
MEASUREMENT
GATE CIRCUIT
DISPLAY
PULSE
OSCILLATOR
ULTRASONIC
RECEIVER

10. Thermocouple -- A Device Consisting Of
Two Dissimilar Conductors With Their Ends
Connected Together. When The Two Junctions
Are At Different Temperatures, A Small Voltage
Is Generated.

11. AD 594 PIN DIAGRAM

12. BASIC CONNECTION FOR THERMOCOUPLE
OPERATION

13. PROGRAMABLE LOGIC CONTROLLER
We Are Using Omron Plc, It Consists Of 6 Inputs & 4 Outputs
Among That 2 Analog Inputs And 4 Digital Inputs
We Are Using The Two Analog Inputs To Control The Corresponding Valve

14. FLOW CHART TEMPERATURE COIL VALUE Temperature sensor Temp <120o cno
Temp <120o c no
Temp <100o c
yes
yes
Value
Fully
closed
Value fully
open
Value open
50%

15. FLOW CHART TRANSPORT CONTROL VALUE LEVEL SENSOR LEVEL < 20% TEMP.,
yes
LEVEL < 20% no
TEMP.,
COIL
VALUES
OPENED
ALL THE
VALUES
CLOSED
LEVEL < 80%
LEVEL = 80%

16. TEMP < 100o c 100o c< Temp <120o c BYE PASS VALUE OPEN
TRANSPORT VALUE
OPEN FOR 40%
TRANSPORTATION
BYE PASS VALUE
OPEN

17. FUTURE EXPANSION Two Or More Tanks Can Be Connected Parallel To
Monitoring Section To Avoid Usage Of More Wiring
Using DCS We Are Able To Control The Various
Tanks From The Remote Control Room

18. CONCLUSION This Project Is Done To Avoid The Loss
Of Asphalt From The Reactor, And
Implemented Successfully In Cpcl

26. TRANSMITTER CIRCUITS
OSCILLATION CIRCUIT
ULTRASONIC OSCILLATOR
RETURN

27. ULTRASONIC SENSOR DRIVE CIRCUIT
RETURN

28. SIGNAL AMPLIFICATION CIRCUIT
RECEIVER CIRCUIT
SIGNAL AMPLIFICATION CIRCUIT
RETURN

29. DETECTION CIRCUIT
RETURN

30. TIME MEASUREMENT
GATE CIRCUIT
RETURN

31. COUNTER CLEAR
PULSE
LATCH CLEAR
PULSE
RETURN

32. Measurement pulse oscillator
return

33. Circuit of the measurement during the time
return

34. Power circuit