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• Measuring & Displaying Environmental Development
• Monitors Pressure,Temparature,Electrical installation status etc.
• Major section of DCS• DCS-Each component subsystem
controlled by one or more controllers
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• Sensing unit measures Industrial parameters
like PRESSURE,TEMPERATURE,3PHASE VOLTAGES,GAS LEAKAGE
• Parameters are Analog quantities ,converted
to digital for manipulation by CPU
PIC16F877A
• Processed Data displayed on LCD
• TRANSMITTER module for transmitting the
proceed data away from sensing station
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• Includes RF RECIEVER for the reception of
transmitted data
• Received datas are manipulated by CPU
PICF877A
• Sending Data to PC Trough Serial port
• Monitoring station-applications are implemented using
LABVIEW
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SENSING UNIT:CPU:PIC16F877A
• 8 Bit Microcontroller-midrange mc-from MICROCHIP
• MEMORY=8kb code+368b data+256b EEPROM
• 5 I\O ports A-E
• Interrupt capability up to 14 sources
• Power-on Reset (POR)+Power-up Timer (PWRT) +Watchdog Timer
(WDT) +Oscillator Start-up Timer (OST)
• Timer0: 8-bit , Timer1: 16-bit timer, Timer2: 8-bit timer+counter
• 10-bit multi-channel Analog-to-Digital converter
• Synchronous Serial Port
• Universal Synchronous Asynchronous Receiver
Transmitter
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3 PHASE VOLTAGE
SENSOR
• Phase across 3 phases are indicated.
• 6-0 step down transformers followed by
signal conditioning are used to interface
3 PHASE supply with mc.
• Voltages are analog quantities, are
converted to digital by adc with in mc.
• Voltage in each phase(R Y B) is displayed
in the LCD
• H:\MAJOR Project\Ckt Daigram\Industrial
Environment.docx
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NPC-1220 solid state pressure sensorPCB mountable package50mv full scale outputH:\MAJOR Project\CktDaigram\Industrial Environment.docx
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Calibrated in degree/KelvinLinear + 10.0 mV/°C scale factorLow impedance output, 0.1 for 1 mA loadH:\MAJOR Project\CktDaigram\Industrial Environment.docx
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MQ2 gas sensor
Base material is SnO2
High sensitivity to LPG, Propane and Hydrogen
H:\MAJOR Project\CktDaigram\Industrial Environment.docx
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FSK transmitter module
Hybrid transmitter TXJ1
Range 1km,2400(BR)
433.92 MHZ
D:\MAJOR Project\Ckt Daigram\Industrial Environment.docx
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RXL1 is a super heterodyne RF receiverfor FSK modulated data433.92 MHz
Receiving sensitivity -120 dB
RX3140 Low Power IF Receiver IC
H:\MAJOR Project\CktDaigram\Monitoring common.docx
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• RS 232 Standard was set before TTL logic family
• RS232 voltage levels -3 ~-25(logic 1),3~25(logic 0)
• TTL logic level is between -3&+3
• MAX232 used (MAXIM Corp.)
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• CPU associated with MONITORING unit receives data at a rate of
1200
• Received data LABVIEW
• Labview -Laboratory Virtual Instrumentation Engineering
Workbench
• Graphical programming
• Front panel
• Block Diagram
• Virtual Instrumentation
• Building stand-alone application with
LabVIEW
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USER INTERFACE-APPLICATION MADE USING
LABVIEW program
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BIBLIOGRAPHY
PIC MICROCONTROLLERS AND EMBEDDED SYSTEMS BY
MUHAMMAD ALI MAZIDI
LABVIEW FOR ENGINEERS:-RONALD W WARSON
ADVANCED PROGRAMMING IN LABVIEW:RICK BITTER,TAKKI
MOHUDDIN
POWER ELECTRONICS:- Dr . B.S BIMBRA
SERIAL PORT COMPLETE BY JANAXLON
LINEAR INTEGRATED CIRCUITS:- Dr. ROY CHOUDHARY,
SHAIL.D.JAIN
ELECTRONIC CIRCUITS & DEVICES:- J.B GUPTA
SOLID STATE ELECTRONIC DEVICES:- DENU STREETMAN,
SANJAY BANERJEE
WWW.NATIONALINSTRUMENTS/LABVIEW.COM
WWW.DATASHEETCATALOG.COM
WWW.TEXASINSTRUMENTS.COM
11/2/2014 [email protected]