1 / 15

Mass Flow Controller System

Mass Flow Controller System. Client: Brad Hodgeman– Instrumentation Specialist, Comparative Biosciences Advisor: Professor Emeritus John G. Webster Team Members: Aaron Huser, Cole Kreofsky, Dana Nadler, Joe Poblocki.

agrata
Download Presentation

Mass Flow Controller System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Mass Flow Controller System Client: Brad Hodgeman– Instrumentation Specialist, Comparative Biosciences Advisor: Professor Emeritus John G. Webster Team Members: Aaron Huser, Cole Kreofsky, Dana Nadler, Joe Poblocki

  2. University of Wisconsin - MadisonBiomedical Engineering Design CoursesINTELLECTUAL PROPERTY STATEMENT

  3. Problem Motivation • Brad Hodgeman researches hypoxia and hyperoxia with rats at the Veterinary Science Building. • Current mass flow controllers are too inaccurate, and the software is outdated. • There are undesirable, manual aspects to protocol that need to be eliminated.

  4. Problem Statement The purpose of this project is to design a system that can create a reproducible and accurate hypoxic/hyperoxic environment with the capability of oscillating between various concentrations of oxygen and nitrogen.

  5. Background • Hypoxia and hyperoxia are atmospheric conditions, where the oxygen level deviates below or above normal (21%) concentration, respectively. • Hypoxia is a form of respiratory distress which induces certain physiological responses by the neuro-respiratory system. These responses have been associated with SIDS, sleep disorders, spinal cord injury, etc.

  6. Mass Flow Controllers • Mass flow controllers often aid in hypoxia research due to their ability to alter Oxygen concentrations to desirable levels for testable consequences.

  7. Current Gas Control System • Computer controlled Command Module (HyperTerminal Software) • Four Analog Mass Flow Controllers • Two Manual Mass Flow Controllers • Four Chambers

  8. Design Constraints • Variable gas concentrations and flow rates through a chamber • Software with an easy to use interface and customizable features • Accurate mass flow controllers, digital or analog • Uniform tubing resistance • Low sound level • Capability for further expansion

  9. Software Development • LabVIEW • Graphical programming environment made for engineers and scientists • Client has had previous experience using DASYLab – a program similar to LabVIEW • Ability to customize programs easily and efficiently • Variety of open source examples of current programs available

  10. Main Areas of Focus • Mass Flow Controller Manufacturers • Sierra Instruments – Series 100 Smart-Trak™ • Advanced Energy – Aera® Mach One • Mykrolis – Intelliflow ™ II • Interface types • Analog • Digital • DeviceNet • RS485 • RS232

  11. Manufacturer Matrix

  12. Digital Accuracy is a function of set point (sp) Multiple gas calibration curves Multiple set point calibration More cost efficient Analog Accuracy is a function of full scale (fs) Manual individual gas calibrations Digital vs. Analog

  13. Digital Interface DeviceNet • Most Expensive • Too sophisticated for this system RS232 • Least Expensive • Ergonomically incompatible RS485 • Moderately Expensive • Ability to daisy-chain cables

  14. System DesignLabVIEW software, RS485 interface and AE MFCs

  15. Questions Any Questions?

More Related