Guest
I have a gas cylinder - H Tank (that can hold oxygen, helium, etc... at
50 psi pressure) that is used for clinical simulation. It has its own
valve that can be switched on / off manually.
1) My requirement is to automate this valve by having a controller to
control the flow of gas in terms of both PRESUURE and TIME based on the
user inputs.
2) Provide a set of knobs / digital input switches each for TIME period
of gas flow - 2 seconds, 5 seconds, and 10 seconds.
(If I choose 10 seconds TIME, the valve opens for 10 seconds, sends the
gas and automatically shuts after 10 seconds)
3) Provide another set of knobs / digital input switches for the LAG
period of gas flow - 10 seconds, 15 seconds, 25 seconds.
(If I choose 15 seconds input, then the valve has to be in the closed
mode for 15 seconds after which it automatically opens
for TIME input that I have chosen in step 2)
4) Provide another set of knobs / digital input switches for the
PRESSURE of gas flow - 25 psi, 35 psi, 50 seconds.
(If I chose 25 psi, then the pressure of the gas coming out of the
cylinder should be 25 psi)
5) My final extension is to control the same knobs / inputs remotely
from my computer through a user interface
(Example, If I chose TIME = 5seconds, LAG = 10 seconds, PRESSURE = 25
psi, the gas flows out of the cylinder at a pressure of 25 psi for a 5
seconds period after a periodic 10 seconds break meaning 5sec ON, 10
sec OFF, 5 sec ON, 10 sec OFF, etc...)
Is there a readymade product that can handle this and what are the
specifications*** that I should look for when I buy such a product ?
How do I approach if I would like to assemble my own system to handle
my requirement and what would be the design ?
In order to handle from the computer remotely, I can connect using a
serial / USB port, is there a free downloadable software
that can convert the serial / usb signals to handle such requirements
based on the circuit ?
I assume that I can have a timer and a pressure sensor to do this that
again converts to mechanical energy in order to stop /
open the valve and regulate the pressure. At the same time, I can also
have some readymade PCBs that understand the serial /
usb signals that I send from my computer to do the job, but I need a
very clear cut design with specifications and implementation procedure
in order to execute this. What are the basic technical specifications
that I have to look for in this new system ? I am basically looking for
an economic solution that can be implemented in my lab for experiments.
Any pointers to this would be of greatest help.
Thanks in advance!!!
SARITA
50 psi pressure) that is used for clinical simulation. It has its own
valve that can be switched on / off manually.
1) My requirement is to automate this valve by having a controller to
control the flow of gas in terms of both PRESUURE and TIME based on the
user inputs.
2) Provide a set of knobs / digital input switches each for TIME period
of gas flow - 2 seconds, 5 seconds, and 10 seconds.
(If I choose 10 seconds TIME, the valve opens for 10 seconds, sends the
gas and automatically shuts after 10 seconds)
3) Provide another set of knobs / digital input switches for the LAG
period of gas flow - 10 seconds, 15 seconds, 25 seconds.
(If I choose 15 seconds input, then the valve has to be in the closed
mode for 15 seconds after which it automatically opens
for TIME input that I have chosen in step 2)
4) Provide another set of knobs / digital input switches for the
PRESSURE of gas flow - 25 psi, 35 psi, 50 seconds.
(If I chose 25 psi, then the pressure of the gas coming out of the
cylinder should be 25 psi)
5) My final extension is to control the same knobs / inputs remotely
from my computer through a user interface
(Example, If I chose TIME = 5seconds, LAG = 10 seconds, PRESSURE = 25
psi, the gas flows out of the cylinder at a pressure of 25 psi for a 5
seconds period after a periodic 10 seconds break meaning 5sec ON, 10
sec OFF, 5 sec ON, 10 sec OFF, etc...)
Is there a readymade product that can handle this and what are the
specifications*** that I should look for when I buy such a product ?
How do I approach if I would like to assemble my own system to handle
my requirement and what would be the design ?
In order to handle from the computer remotely, I can connect using a
serial / USB port, is there a free downloadable software
that can convert the serial / usb signals to handle such requirements
based on the circuit ?
I assume that I can have a timer and a pressure sensor to do this that
again converts to mechanical energy in order to stop /
open the valve and regulate the pressure. At the same time, I can also
have some readymade PCBs that understand the serial /
usb signals that I send from my computer to do the job, but I need a
very clear cut design with specifications and implementation procedure
in order to execute this. What are the basic technical specifications
that I have to look for in this new system ? I am basically looking for
an economic solution that can be implemented in my lab for experiments.
Any pointers to this would be of greatest help.
Thanks in advance!!!
SARITA