10-03-2012, 04:19 PM
RAILWAY COACH AUTOMATION
The temperature of an AC coach is maintained. During summer the Cold air is
blown in to decrease the temperature of the coach & during the winter hot air is
blown to increase the temperature to maintain the Coach Temperature within the
specified limit. Two motors are used for this purpose Motor 1 is used to blow the cold
air & Motor 2 is used to Blow the hot air inside the coach. The temperature is sensed
using LM35 as a temperature sensor whose output is given to ADC & then to the
Micro Controller. LCD is used to display the current temperature as well as the
temperature set point & the Motor Status. A compressor is also used to circulate the
air within the compartment. We will monitor the current used by the compressor
using a Current Transformer if the current is above or below a specific limit the
compressor can be said to be faulty & need replacement. This is also indicated on the
LCD.
