Monitoring and data logging system for a generator
Monitoring and Data Logging System For a Generator
The very first reason which motivated us toward
this project is that we wanted some digital
control (Microcontroller Based) for controlling
different parameters of Synchronous Generator.
In the World of machinery, the control of the
machine has moved almost completely from
analogue electronic to digital. This happened to
the case for the synchronous machine as well.
Synchronous machines are used almost
universally in power stations around the World as
The objective of this project is to design and
construct a closed loop speed control system for
speed governor, voltage regulator and
protection system for the three - phase
1. Automatic and manual mode
2. Sensing the system
RPM (Revolution Per
3. Controlling the parameters
Frequency control for
Automatic voltage control
4. Protection system
5. Digital display using LCD
6. Serial port interfacing
7. Data logging
8. Uploading data on web page
Circuit Designing of Frequency and voltage control modules.
Programming of 8051 microcontroller. Simulating the
designed circuits on Proteus software.
Designing PCB for each module.
Making circuit hardware of modules.
Assembly of all parts on a single board.
Finalize checking of the working of all circuit modules.
Sine wave to square wave converter
DC motor (1H.P)
Synchronous generator (0.3 KW)
4.Temperature sensor LM 35
6. IR sensor
Function of voltage control
8-channel ADC is connected 8051 to measure the analog
4069 is used to convert the sine wave to square wave. This square
wave is applied to 8051 to measure the frequency of AC signal.
To monitor and display the generator parameters of synchronous
generator on the LCD display.
To monitor the variations in the value of parameters of generator
to determine whether these values exceed the limit given in the
When any value of parameter exceed the predefined limit
specific numbed is send to main control unit through serial port
of microcontroller. This number is recognized in the main control
unit to determine the type of fault.
A 20x2 LCD is used for displaying the different parameters.
Features of LM 335
Calibrated directly in ° Celsius (Centigrade)
Linear + 10.0 mV/°C scale factor
0.5°C accuracy guarantee able (at +25°C)
Rated for full −55° to +150°C range
Suitable for remote applications
Low cost due to wafer-level trimming
Operates from 4 to 30 volts
Less than 60 μA current drain
Low self-heating, 0.08°C in still air
No linearity only ±1⁄4°C typical
Low impedance output, 0.1 W for 1 mA load
IR proximity sensor
This sensor can be used to measure the speed of object
moving at a very high speed, like in industry or in
The sender is
composed of an IR
LED (D2) in series
with a 470 Ohm
resistor, yielding a
forward current of
The receiver part is
2 resistors R5 and
R6 form a voltage
provides 2.5V at
the anode of the
MAX232 is an integrated circuit that
converts signals from an RS-232 serial port to
signals suitable for use in TTL compatible digital
logic circuits. The MAX232 is a dual
driver/receiver and typically converts the RX,
TX, CTS and RTS signals.
HyperTerminal is a built-in windows
program that can be used to
connect to other computers, online
services, and host computers and
other devices using either modem
or a serial DB-9 cable.
Band Rate = 2400 bits per Sec
Connection using COM1port