LabVIEW
control of valves
Hi all
First of all I'm new in using LabView so 
I have a small project. I have to test some compressor at different pressures. From 1-12 Bar. I would like to make an automatic process. The compressor is connected to a tank of X size, then start to generate a pressure in the tank. When the pressure level reaches 1 bar then I want to control the valve that controls the quantity of air that leaves the tank, so that the pressure stays at 1 bar for e.g. 5sec so I can make some measurements, etc to 12 bar. The smaller amount of air that is allowed to leave the tank - the higher pressure.
Any ideas to solve my problem?
Which components should be used?
Best regards
Flemming Nielsen
Application Engineer
On Mar 11, 8:40 am, ftn <x...@no.email> wrote:
> Hi all
>
>
>
> First of all I'm new in using LabView so
>
> I have a small project. I have to test some compressor at different pressures. From 1-12 Bar. I would like to make an automatic process. The compressor is connected to a tank of X size, then start to generate a pressure in the tank. When the pressure level reaches 1 bar then I want to control the valve that controls the quantity of air that leaves the tank, so that the pressure stays at 1 bar for e.g. 5sec so I can make some measurements, etc to 12 bar. The smaller amount of air that is allowed to leave the tank - the higher pressure.
>
>
>
> Any ideas to solve my problem?
>
> Which components should be used?
>
>
>
> Best regards
>
> Flemming Nielsen
>
> Application Engineer
A couple of suggestions. One is a motorized air pressure regulator.
See:
http://www.controlair.com/transducers/100mtrans.html for an example.
Another suggestion is make your own closed loop pressure regulator.
For this you need a motorized valve, a pressure transmitter and a
controller. The input signal to your controller is your required tank
pressure and the actual tank pressure is measured by your pressure
transmitter and fed back to your controller. Your controller then
changes the position of the motorized valve until the required and
actual pressure are approximately equal. The motorized valve is
performing the function of a variable sized orifice and controls the
flow rate of the air being being released from your tank. Then
depending upon the type of motorized valve you bought you may be able
to implement your controller in Labview.
Howard
> Hi all
>
>
>
> First of all I'm new in using LabView so
>
> I have a small project. I have to test some compressor at different pressures. From 1-12 Bar. I would like to make an automatic process. The compressor is connected to a tank of X size, then start to generate a pressure in the tank. When the pressure level reaches 1 bar then I want to control the valve that controls the quantity of air that leaves the tank, so that the pressure stays at 1 bar for e.g. 5sec so I can make some measurements, etc to 12 bar. The smaller amount of air that is allowed to leave the tank - the higher pressure.
>
>
>
> Any ideas to solve my problem?
>
> Which components should be used?
>
>
>
> Best regards
>
> Flemming Nielsen
>
> Application Engineer
A couple of suggestions. One is a motorized air pressure regulator.
See:
http://www.controlair.com/transducers/100mtrans.html for an example.
Another suggestion is make your own closed loop pressure regulator.
For this you need a motorized valve, a pressure transmitter and a
controller. The input signal to your controller is your required tank
pressure and the actual tank pressure is measured by your pressure
transmitter and fed back to your controller. Your controller then
changes the position of the motorized valve until the required and
actual pressure are approximately equal. The motorized valve is
performing the function of a variable sized orifice and controls the
flow rate of the air being being released from your tank. Then
depending upon the type of motorized valve you bought you may be able
to implement your controller in Labview.
Howard
