Industrial Temperature Controller System - PowerPoint PPT Presentation

Title: Industrial Temperature Controller System


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Industrial Temperature Controller
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Industrial Temperature Controller
Introduction

• This practical temperature controller controls
  the temperature of any device according to its
  requirement for any industrial application. It
  also displays the temperature on an LCD displays
  in the range of 55C to 125C. At the heart of
  the circuit is the microcontroller from 8051
  family which controls all its functions.
• The DS1621 Digital Thermometer and Thermostat
  provides 9-bit temperature readings, which
  indicate the temperature of the device.
  User-defined temperature settings are stored in a
  non volatile memory EEPROM through 8051 series
  microcontroller. Maximum and minimum temperature
  settings are entered to the MC through a set of
  switches which are stored in the EEPROM
  -24C02.Maximum and minimum setting are meant for
  allowing any hysteresis necessary.

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Industrial Temperature Controller
Block Diagram
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Industrial Temperature Controller
Hardware Requirements

• Transformer
• Voltage regulator
• Diodes
• Capacitor
• Resistors
• Microcontroller (AT89S52)
• Temperature sensor (DS1621)
• BC547
• Relay
• Lamp
• LCD (16x2)

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Industrial Temperature Controller
Software Requirements

• Keil compiler
• Embedded C

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Industrial Temperature Controller
Microcontroller (AT89S52)

• It is a smaller computer
• Has on-chip RAM, ROM, I/O ports...

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Industrial Temperature Controller
Internal Structure Of A Micro Controller-AT89s52/5
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Industrial Temperature Controller
Microcontroller Pin Description
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Industrial Temperature Controller
Temperature Sensors

• Measures temperatures from -55C to 125C in
  0.5C increments. Fahrenheit equivalent is -67F
  to 257F in 0.9F increments.
• Temperature is read as a 9-bit value
  (2-bytetransfer).
• Wide power supply range (2.7V to 5.5V).
• Converts temperature to digital word in less Than
  1 second.
• Thermostatic settings are user definable and Non
  volatile.

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Industrial Temperature Controller
Temperature Sensors

• Data is read from/written via a 2-wire serial
  interface (open drain I/O lines).
• Applications include thermostatic controls,
  industrial systems, consumer products,
  thermometers, or any thermal sensitive system.
• It is as 8-pin DIP or SO package.

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Industrial Temperature Controller
Relay

• It is a electro magnetic switch
• Used to control the electrical devices
• Copper core magnetic flux plays main role here
• The relay's switch connections are usually
  labelled COM, NC and NO

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Industrial Temperature Controller
Relay

• COM Common, always connect to this it is the
  moving part of the itch.
• NC Normally Closed, COM is connected to this
  when the relay coil is off.
• NO Normally Open, COM is connected to this when
  the relay coil is on

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Industrial Temperature Controller
BC547 Transistor

• The BC547 transistor is an NPN Epitaxial Silicon
  Transistor.
• The BC547 transistor is a general-purpose
  transistor in small plastic packages.
• It is used in general-purpose switching and
  amplification BC847/BC547 series 45 V, 100 mA NPN
  general-purpose transistors.
• Whenever base is high, then current starts
  flowing through base and emitter and after that
  only current will pass from collector to emitter

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Industrial Temperature Controller
Capacitor

• A capacitor or condenser is a passive electronic
  component consisting of a pair of conductors
  separated by a dielectric.
• When a voltage potential difference exists
  between the conductors, an electric field is
  present in the dielectric.
• This field stores energy and produces a
  mechanical force between the plates.
• The effect is greatest between wide, flat,
  parallel, narrowly separated conductors.

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Industrial Temperature Controller
LED

• Features
• Water Clear Lens
• 850nm Wavelength
• Forward Voltage - 1.7V
• A light-emitting diode (LED) is an electronic
  light source.
• LEDs are used as indicator lamps here.

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Industrial Temperature Controller
LCD - Liquid Crystal Display

• A liquid crystal display (LCD) is a thin, flat
  display device.
• It made up of any number of colour or monochrome
  pixels arrayed in front of a light source or
  reflector.
• Each pixel consists of a column of liquid crystal
  molecules.
• It suspended between two transparent electrodes,
  and two polarizing filters, the axes of polarity
  of which are perpendicular to each other.
• Many microcontroller devices use 'smart LCD'
  displays to output visual information.

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Industrial Temperature Controller
LCD - Liquid Crystal Display
Data can be placed at any location on the LCD.
For 162 LCD, the address locations are First
line 80 81 82 83 84 85 86 through
8F Second line C0 C1 C2 C3 C4 C5 C6
through CF
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Industrial Temperature Controller
Working

• The project uses a digital temperature sensor
  DS1621 the surface which is capable of sensing
  the temperature delivering digital data at its
  output which are connected to the controller.
• The LCD displays the present temperature, maximum
  temperature and minimum temperature. The maximum
  and minimum values are entered through switches
  attached to the microcontroller.
• The maximum and minimum settings are stored in
  the EEPROM. If the temperature goes below the
  minimum value the heater is on as indicated by a
  lamp connected through a relay driven by a
  transistor connected to the microcontroller. If
  the temperature crosses the maximum value the
  heater is switched off.

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Industrial Temperature Controller
Why Do We Need Temperature Controllers?

• Temperature controllers are needed in any
  situation requiring a given temperature be kept
  stable.
• When an object is required to be heated, cooled
  or both and to remain at the target temperature
  (set point).
• Regardless of the changing environment around it.
• There are two fundamental types of temperature
  control open loop and closed loop control.

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Industrial Temperature Controller
Applications

• This device is extensively used in the
  manufacturing sector, automobile company, steel
  and Iron Company, food processing company and
  medical sector etc.
• A basic temperature controller provides control
  of industrial or laboratory heating and cooling
  processes.
• To encounter the accurate level of temperature is
  very crucial and it becomes very necessary in the
  manufacturing process.
• Monitoring and controlling of temperature helps
  in maintaining the quality of the product.

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Industrial Temperature Controller
Conclusion

• Temperature control comes in the digital version
  that makes the work of the user easy and can run
  the tool without any complication. The exact
  numbers can be seen on the device screen and it
  is very beneficial for the firm to see the
  accurate level of temperature available in the
  room. You can easily buy this device from the
  market or can buy it online as well.

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