Water level in a dam needs to be maintained effectively to avoid
complications. This is generally performed manually which requires full
time supervision by the operators & have fairly large staff
complements. Moreover, the quantity of water released is hardly ever
correct resulting in wastage of water & it is impossible for a man
to precisely control the gates without the knowledge of exact water
level and water inflow rate.
The main objective of this project is to develop a mechatronics based
system, which will detect the level of water and estimate the water
inflow rate in a dam and thereby control the movement of gates
automatically in a real-time basis which offers more flexibility. This
system consists of a set of sensors connected to a stepper motor through
an 8-bit microcontroller. This microcontroller operates the H-Bridge
which in turn control the operation of the DC motor i.e. switches on the
DC moving it in a clock wise direction. The water level and rate of
inflow is detected based on the feedback from the sensors used. Based on
this data, the level of dam gate can be automatically controlled using a
DC motor.
The LPC2148 are based on a 16/32 bit ARM7TDMI-S™ CPU with real-time
emulation and embedded trace support, together with 128/512 kilobytes of
embedded high speed flash memory. A 128-bit wide memory interface and
unique accelerator architecture enable 32-bit code execution at maximum
clock rate. For critical code size applications, the alternative 16-bit
Thumb Mode reduces code by more than 30% with minimal performance
penalty. With their compact 64 pin package, low power consumption,
various 32-bit timers, 4- channel 10-bit ADC, USB PORT,PWM channels and
46 GPIO lines with up to 9 external interrupt pins these
microcontrollers are particularly suitable for industrial control,
medical systems, access control and point-of-sale. With a wide range of
serial communications interfaces, they are also very well suited for
communication gateways, protocol converters and embedded soft modems as
well as many other general-purpose applications.
This project uses two power supplies, one is regulated 5V for modules
and other one is 3.3V for LPC2148. 7805 three terminal voltage regulator
is used for voltage regulation. Bridge type full wave rectifier is used
to rectify the ac out put of secondary of 230/12V step down
transformer.
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