Monday 27 August 2012

FINAL YEAR PROJECT






On this project title, temperature sensor as the input to sense the whole temperature during the working process. Temperature sensors are needed to sense the temperature heat that will occur during the temperature system is activated and to beware about the high temperature. This is because the high temperature will effect the system.
Why Monitor Temperature? 


"COMPONENTS MAY BE DAMAGED IF THE TEMPERATURE FALLS OUTSIDE THE OPERATING RANGE AND THEN THE OPERATION WILL BE FAILURE"

At first I have to search and comparing a certain temperature sensors that available in the market that suit the characteristic of the project function before deciding to choose either one.


Desired Sensor Characteristics


 

 i.  RESISTANCE TEMPERATURE DETECTOR (RTD)

ii. IC SENSORS


 


iii. THERMOCOUPLE SENSORS
 


 iv. THERMISTOR


From all the temperature sensor above, temperature sensor LM35 is one of the most accurate and economical integrated circuit temperature sensors that available in market. The LM35 series are precision integrated circuit temperature sensors, whose output voltage is linearly proportional to the Celsius temperature. The LM35 thus has an advantage over linear temperature sensors calibrated in ° Kelvin, as the user is not required to subtract a large constant voltage from its output to obtain convenient Centigrade scaling. The LM35 also does not require any external calibration or trimming to provide typical accuracies of ±¼°C at room temperature and ±¾°C over a full -55 to +150°C temperature range.  




APPENDIX : DATA SHEET : http://www.ti.com/lit/ds/symlink/lm35.pdf  

THANK YOU
Posted by sakinabahruddin at 17:18

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SAKINA NOORSHEILA BINTI BAHRUDDIN

SAKINA NOORSHEILA BINTI BAHRUDDIN
51211111068

PROJECT SCOPE

The project scope to produce the proposed product including the process of researching the ideas, references, and information to develop a high quality of temperature control devices that having a low cost systems and beneficial. Another project scope is to analyze how the PID controller can be implemented with the microcontroller to produce accurate results and controlling the temperature as well.

ABSTRACT

This temperature sensing project requires controlling or reducing the temperature of the full running machine that produce the extreme temperature that can cause failure. The basic concept of project is the input of temperature sensor will act as the input device and read the temperature. The reading signal should be sent to the PIC16F876A microcontroller and operate as the PID controller system as the controller to reducing the hot air. Lastly, buzzer set as alarm should be start to operate to give warning which alert the users that the equipment working at the excessive temperature. The actions can reduce the cost of maintaining of failure equipment and also can improve the reputation of the production sites. In addition to this, the proposed project will be implemented for the low cost product so that this systems or product can be sold for education purposed.