ABSTRACT: This paper focuses on the temperature control of

ABSTRACT: Thispaper focuses on the temperature control of the equipment that  are sensitive to temperature over a particularlimit.

When the temperature increases over a certain limit that cannot betolerated by the equipment in that environment. In such situations, thistemperature control system allows interaction  between the equipment and the temperaturemaintaining devices like fan and air conditioners to set the temperaturerequired by the system. This interaction  between  devices is done by ZigBee sensor andmicrocontroller and to detect the presence of human we use PIR sensor. Thissystem helps to reduce energy consumption and avoids malfunctioning of thesystem. Keywords:PIR Sensor(Passive Infrared Sensor), ZigBee Sensor, microcontrollerINTRODUCTION:The temperaturecontrol alert system is like programmed thermometer, that checks thetemperature of certain environment. The advantage of temperature detection isany changes in temperature that causes damage of equipment can be found andmalfunctioning of the instrument can be saved. At Homes:  Some places at home are set to certaintemperature ie.

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, it is neither too hot nor too cool. So that the person canlead a comfortable life. At Industries:Many instruments are stored in places where the temperature is set to certaindegrees, if change in the temperature may result in wastage of capital investedin production.Automaticcontrol of temperature is certified to be the best methodology because itdoesn’t require man interaction with the device that is being affected and itrescues the instruments from malfunctioning.

 The main objective of the proposed modelis to control the room temperature, which is suitable for instruments in thatparticular room. If the temperature of the room goes beyond the thresholdvalue, it alerts the user. If the user is unavailable, it automatically set theroom temperature to the required level. 1.     Microcontroller:Microcontroller allows to control the external devices.

It allows theprogrammer to give input and produce the required output.2.     Heat Sensor:The heat sensor is used to detect the changes in the temperature.3.

     PIR Sensor(Passive Infrared sensor): The PIR Sensor is used to detect the movements ofhumans and animals.4.     ZigBee Protocol:The ZigBee protocol is used for wireless communication between the devices. Itis used to monitor the temperature in short region.

5.     Alert system:It gives alert, when the temperature reaches its threshold value.  AC Section:           CPU Section:                                                         yyy       WORKING MODEL:The proposed model to control temperature using fan speed or air conditioner, isrepresented in the below diagram.                 FIG: Working model for ACcontrolling systemIf thetemperature of the personal computer goes beyond the threshold value, it alertsthe user. If the user is unavailable, it automatically set the room temperatureto the required level. ADVANTAGE:1.

     Themerit of the proposed system is that, the manual calculation reduces.2.     Analysingand processing is done.3.

     Twoway communication between devices.4.     Reducesthe wastage of energy usage and malfunctioning of the device. RELATED  SURVEY:On proposing a literaturesurvey on the related works the following research is carried out:In paper1, Thepaper brings optimized and performance based algorithm for automatic controlsystem. It is used in clinical treatment such as hyperthermia.In paper4, Thetemperature monitoring of computer server room is performed.

Due to theincrease in the temperature if the performance of the server decreases, itsends an alert message to the administrator.In paper5,This paper deals with real time application of controlling the temperature andsetting its value back to the threshold using Arduino. This experiment alsohelps to control the speed of the fan for the disabled people.In paper6, Themain objective of this paper is, it develops a wireless sensor for monitoringthe temperature. In case of any emergency situations, the developed wirelessnetwork using ZigBee helps to save lives of human.In paper7,This papers motive is to overcome issues in WSN by concepts like ArtificialIntelligence and Machine Learning. So that the system will be able to manageitself.

In paper13,The main aim of the paper focuses on reduction of manual calculation oftemperature and making it automatic. This automatic temperature remains  constant for a long and this constant value is noted for further calculation.In paper14,This paper discuss the methodologies of saving energy. The major part of  the paper  deals with saving energymechanism  depending on the intensity ofthe light.

It also provides solution for changing the temperature of the  room based on the  heat in the environment.In paper15,The paper deals with controlling humidity and temperature using two fuzzy logiccontroller. The first controller detect the temperature and sets it to themoderate value, while the other controller calculates  the humidity in percentage. Thus it is usedin the optimization of  fuzzy logicsystems in automation.  CONCLUSION:  Astemperature increases, performance of device suffers. So, cooling of thesechips in a processor or equipment is necessary. When the performance of thesystem decreases, the temperature control system should alert the user or anycooling agent to reduce the temperature to the required limit.

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