dylan Posted April 6, 2014 Report Share Posted April 6, 2014 hi there Just wanting some advice. I have a pressure transducer fitted to a Venturi tube for my college project. I have a output range of 0.25 v to 4v output. Only problem being is the output is jumping all over the place, is there a method of using filters to stabilize the output so i can use p.i control. regards Dylan Quote Link to comment Share on other sites More sharing options...
MVP 2022 Joe Tauser Posted April 7, 2014 MVP 2022 Report Share Posted April 7, 2014 Define "all over the place". Is it jumping because your pressure is widely varying or is the transducer unstable? Joe T. Quote Link to comment Share on other sites More sharing options...
dylan Posted April 7, 2014 Author Report Share Posted April 7, 2014 Hi joe At first i assumed the transducer was unstable, but after discussion with a lecturer and testing with a Druck it has been suggested turbulence is the problem. This is because of the setup of the rig is measuring Air flow. i have fitted a baffle to counter act this and the output is still varying from 1.1 volt to 1.5 volts at a steady input flow . Can i place 2 filters before the linearization and would you expect this to work? Dylan Quote Link to comment Share on other sites More sharing options...
MVP 2022 Joe Tauser Posted April 8, 2014 MVP 2022 Report Share Posted April 8, 2014 Start with the Filter function block on your analog input value- FB's->Filter. Read the Help on how to set it up - it's pretty easy. It is limited to averaging 16 values. If you need to filter more you'll need to write some summing logic using MLs to divide by a larger number of samples. Joe T. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.