Friday 7 September 2018

Interface LPG gas sensor MQ5 with LabVIEW using NI USB 6008 DAQ card

Objective:


  • Interface the LPG sensor MQ5 with LabVIEW.
  • Acquire the data as an analog input signal.
  • Give a hardware indication with blink light and beep sound when gas leakage is detected.
  • Draw the front panel like the figure shown below.


Apparatus Required:


NI USB 6008
LPG sensor MQ5
Transistor BC547
External Power Supply
LED
Buzzer
Breadboard
Resistor 22KOhms

Procedure:




  • Connect the component as per the circuit diagram.
  • Use External Power Adapter. Make the ground of DAQ and external source common.
  • configure the DAQ to acquire analog voltage.
  • Fix a threshold value to detect the gas leakage.
  • Then take another DAQ asst. and configure it to generate a digital signal, when the gas is detected, for the hardware indication purpose.
  • Also, log the data and status of gas leakage in a text/excel file as per the following format. 

Date
Time
Data
Status








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