Design And Construction Of Heat Detector

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Abstract

This project work focuses on the design and construction of heat detector for use in homes, industries, offices etc. It uses thermistor as the heat sensitive element; which is a type of resistor whose resistance changes significantly according to temperature change. The thermistor was connected as a voltage divider to one input therminal of the comparator (Pin 2) of the 555 timer IC as the resistance of the thermistor increases, the voltage at pin 2 decreases. Thus pin 1 becomes high and biases the N.P.N transistor moleing it to drive the 9V input load which activities the alarm circuit with the design of rate-of-heat detector a temperature increase of the sensor, to output is at 75oC or more per minutes; that is to trigger alarm. The heat sensor can be said to be ideal for environments with high dust or rapaid fire development.

Table of Content
Title Page: =================================    i
Certification: ==============================    ii
Table of Content: ===========================    iii

Chapter One
1.0    Introduction: =========================        1
1.1    Background of the Study: ================         1
1.2    Statement of the Problem: ================         4
1.3    Objective of the Study: ================            4
1.4    Significance of the Study: =================     5    
1.5    Scope of the Study: ======================     6
1.6    Research Question: ======================     6

Chapter Two
Literature Review: ===========================     8
2.1    Heat (Heat Transfer): =====================        8
2.2    Sensor: ===============================        11
2.2.1    Heat Sensor: ===========================       15
2.2.2    Electromechanical: ======================       17
2.2.3    Optomechanical: ========================       20
2.2.4     Electropneumatic: ======================       21
2.3    Application of Heat Sensor: ===========           22
2.4    Forms of Heat Sensor: ===============           24
2.4.1    Thermo couples: ====================           25
2.4.2     Resistant Temperature Devices (RTD): ======        26
2.4.3     Infrared Sensors: ======================        27
2.4.4 Bimetallic Devices: ================= ====        27
2.4.5     Thermometers: ========================       28
2.4.6 Silicon Diode: ======================               29
2.4.7 Thermostat: ==========================        29
2.5    Description of Component: ===============       30
2.5.1     Thermistor: ==========================      31
2.5.2 Transistor: ===========================      32
2.5.3 Resistor =============================      33
2.5.4 Capacitor: ===========================      35
2.5.5 Buzzer: =============================     36
2.5.6 Veroboard: ===========================     37
2.5.7   Light Emitting Diode: =================     37

Chapter Three
Materials and Method: =======================    39
References: ================================    48












   

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(2016, 01). Design And Construction Of Heat Detector.. ProjectStoc.com. Retrieved 01, 2016, from https://projectstoc.com/read/7058/design-and-construction-of-heat-detector-47
"Design And Construction Of Heat Detector." ProjectStoc.com. 01 2016. 2016. 01 2016 <https://projectstoc.com/read/7058/design-and-construction-of-heat-detector-47>.
"Design And Construction Of Heat Detector.." ProjectStoc.com. ProjectStoc.com, 01 2016. Web. 01 2016. <https://projectstoc.com/read/7058/design-and-construction-of-heat-detector-47>.
"Design And Construction Of Heat Detector.." ProjectStoc.com. 01, 2016. Accessed 01, 2016. https://projectstoc.com/read/7058/design-and-construction-of-heat-detector-47.

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