Water Level Detector in LabVIEW

Water Level Detector in LabView

• Tank
• Vertical Pointer
• Upper Level Indicator
• Lower Level Indicator
• Graph to observe the results

• Go to the "Front Panel" and press "Right Click" from your personal computer or laptop.
• Now, go to the Controls-> Modern-> Numeric-> Tank.
• By doing this, you can see the following figure in your PC's screen.

• You can see different blocks in the above figure
• Select the encircled "Tank" and place it on the "Front Panel"
• It looks like the below figure

• Now, put the "Cursor" on the tank and press "Click" you can see that the water level changes with each different click on the tank
• You can see the above step in the figure below:

• Blue color show the level of the water in the tank.
• Now go to the "Front Panel" and then go to the Controls-> Modern-> Numeric-> Vertical Pointer.
• By doing this, you can see the following figure in your PC's screen:

• You can see different blocks in the above figure.
• Select the encircled block i.e. "Vertical Pointer".
• Place this block on the "Front Panel".
• It is looking like the figure below:

• Put the "Cursor" on the "Vertical Pointer", press click and then move up and down.
• It looks like the figure below:

• Blue color indicates the value or rate at which we want to fill the tank
• So now, you have selected both the tank and the vertical pointer and you can see that it looks like the figure below:

• Now press "Ctril+T"
• You can see the "Block Diagram" window is looking like the below figure

• Now, since we want to control the level of the water in the tank with the help of the vertical pointer by adjusting it at different positions
• So, we have to build a connection between them
• Take a wire from the output terminal of the vertical pointer (Slide) and connect it to the input terminal of the tank
• The figure below exhibits the above steps

• No we have to set the upper and lower level for the less and high amount of water indication
• We need to put two LED's, one for the upper level ndication and the second for the lower level indication

Upper Level Indicator

• Press "Click" on the "Block Diagram" window
• Go to the Functions-> Programming-> Comparison-> Greater or Equal?
• Figure displays the above steps

• Select and place this block on the "Block Diagram" window
• Connect its first input terminal with the output terminal of the "Vertical Pointer"
• Go to the second input terminal of the "Greater or Equal" press "Right Click"
• Go to the Create->Constant
• The figures below displays the above steps

• Set the value of the constant as "9"
• The figure shows the adjusted value of the "Constant"

• Now we have to put an LED in the "Front Panel" for the upper level indication
• Press "Right Click" on the "Front Panel"
• Go to the Controls-> Modern-> Boolean-> Square LED
• The figure below shows all of the above steps

• Select the LED and place it onto the "Front Panel" with the top right corner of the tank
• Figure elaborates a bit more

• 

  Now, Go to the "Block Diagram" window again
• Connect the output terminal of the "Greater or Equal" to the input terminal of the "LED" as shown below

• Now go back to the "Front Panel"
• You can see, as the vertical pointer moves up from the desired upper which is "9" in this case, limit LED turns on
• Here is the screenshot of the "ON" LED

Lower Level Indicator

• As the upper limit is adjusted above.
• Similarly set the lower limit.
• Go to the "Block Diagram" window and press "Right Click".
• Go to Functions-> Programming-> Comparison-> Less or Equal.
• select this block and connects one of its inputs to the "Vertical Pointer".
• Go to the second input and press "Right Click".
• Go to Create-> Constant.
• Set the constant, in this case I have set it to "2" as shown below:

• Place and LED in " Front Panel"
• In "Block Diagram" window connect the LED with the "Less or Equal" block

• If you want that your program should no terminate until you did it by your self then follow the below steps
• Now, Go to the "Front Panel" and press "Right Click"
• Go to Functions-> Programming-> Structures-> While Loop
• Select and place it on the "Block Diagram" window
• Place the whole program inside the "While Loop"

• Now, go to the "Front Panel" and press "Right Click"
• Go to Controls-> Modern-> Boolean-> Stop Button
• Select and place it on the "Front Panel"
• Now, go to the "Block Diagram" window
• Connect this button with the "RED" small circle at the bottom right corner of the "While Loop" as shown below in the figure
• Complete "Block Diagram" logic of making water level detector is shown below

• Complete output of the water level detector is shown below