A Simple Flow Measurement System for Rotameters Using Webcam

  • Pooja Nag
  • Sumit Shinde
  • Dayananda Nayak
  • Kapil SadaniEmail author
Conference paper
Part of the Lecture Notes in Networks and Systems book series (LNNS, volume 11)


In this work, we report of a noncontact level measurement based on machine vision techniques. Data has been acquired with a high-definition webcam @ 30 frames per second. Image-processing algorithms have been developed and optimized using LabVIEW. The measurement may then automate a servo actuated hand-valve. On testing, the system was found to be linear, repeatable, and accurate to ±0.5% of the measured value for 50 measurements carried out. In the scheme are proposed hereof, the levels may just be remotely observed on a LabVIEW SCADA panel and used as a set point to a regulatory control-actuator system. The system is rugged and can be calibrated to 0.05% precision for all rotameter types used in any environment from a simple DM plant to a petrochemical industry for a fixed camera distance.


Computer vision PID controller Pattern matching Template matching 


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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Pooja Nag
    • 1
  • Sumit Shinde
    • 3
  • Dayananda Nayak
    • 2
  • Kapil Sadani
    • 2
    Email author
  1. 1.Department of MechatronicsManipal Institute of Technology, Manipal UniversityManipalIndia
  2. 2.Department of Instrumentation and ControlManipal Institute of Technology, Manipal UniversityManipalIndia
  3. 3.Department of Embedded Systems EngineeringAlbert Ludwig University of FreiburgFreiburg im BreisgauGermany

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