ABSTRACT
The Transformers used in EB are mainly to handle the high power
ratings, hence it dissipate more heat. When the temperature goes beyond certain
limit, it may burst and may hurt the people closer to it. This also causes
remarkable loss and threatening human life. This project is developed to
protect such incidents, by monitoring the temperature of the transformer and
controlling the heat. When the heat is not under the control, it may alert the
EB department to take action.
A temperature sensor is fixed on the body of the transformer,
which is to be monitored (Refer first Block Diagram). The sensor produces weak
current signal, proportional to the temperature. This current signal is
amplified and converted as analog voltage signal by the signal conditioner. An
analog comparator is used to compare this analog voltage with a pre-set input
(Which is the set temperature).This comparator produces trigger logic ‘1’, when
the temperature of the transformer exceeds the threshold value. The trigger
signal is fed as input to a microcontroller port pin. The microcontroller
senses this logic’1’ signal and switch ON the cooling fan waits for few
minutes. If the temperature is not become low with in this period, then the
controller sends alert code with its identification code to a RF module. The RF
module is gets the data from microcontroller, modulates the digital signal with
433Mhz carrier and transmits. The module uses Amplitude Shift Keying (ASK) type
modulation technique.
BLOCK DIAGRAM:
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