Design and Implementation of Real-Time Flow Measurement System Using Hall Probe Sensor and PC-Based SCADA

A rotameter is a variable-area-type flow rate measuring instrument in which the position of a metallic float in a transparent conical tube is taken as a flow rate indicator. It has the disadvantage that it is a local indicating type instrument and special type of transducer is used for its remote indication. In this paper, a noncontact flow rate measurement technique using Hall probe sensor and rotameter is designed, developed, and tested. In this design, a float carrying a thin circular permanent magnet is used, and a Hall probe sensor placed outside the rotameter tube has been used to sense the variation of magnetic field of the magnet with the variation of float position. A signal conditioner unit has been used to convert the Hall probe sensor output into 1-5 V dc signal. This dc signal output of the signal conditioner has been sent to a PC-based flow indicator through optoisolator and analog input channel of a data acquisition system (DAS) card. The PC-based flow indicator has been designed using the Lab Tech Note Book Pro software and the PC-based supervisory control and DAS. A theoretical equation has been derived to explain the operation of the system. The performance of the system has been tested experimentally, and the experimental results are reported in this paper. A very good repeatability and linearity of results has been observed.

[1]  Ernest Otto Doebelin,et al.  Measurement Systems Application and Design , 1966 .

[2]  Béla G. Lipták.  Process measurement and analysis , 2003 .

[3]  Furio Cascetta.  Effect of fluid pressure on Coriolis mass flowmeter's performance , 1996 .

[4]  Sergio Silvestri,et al.  A novel target-type low pressure drop bidirectional optoelectronic air flow sensor for infant artificial ventilation: measurement principle and static calibration. , 2011, The Review of scientific instruments.

[5]  Nam-Trung Nguyen,et al.  Micromachined flow sensors—a review , 1997, Flow Measurement and Instrumentation.

[6]  M Süßer.  Flow Measurement Handbook: Industrial Designs, Operating Principles, Performance and Applications , 2000 .

[7]  Upasana Manimegalai Sridhar,et al.  A power law approach to orifice flow rate calibration. , 2011, ISA transactions.

[8]  Douglas M. Considine,et al.  Process Instruments and Controls Handbook , 1957 .

[9]  Loganathan Umanand,et al.  Non-disruptive and null-deflection mass flow measurement by a pressure compensation technique , 2010 .

[10]  Adolfo Palombo,et al.  Water flow measurement in large bore pipes: an experimental comparison between two different types of insertion flowmeters. , 2003, ISA transactions.

[11]  Manus P. Henry,et al.  The dynamic performance of a new ultra-fast response Coriolis flow meter , 2006 .

[12]  S. C. Bera,et al.  A novel technique of using a thyristor driven pump as the final control element and flow indicator of a flow control loop. , 2011, ISA transactions.

[13]  Nirupama Mandal,et al.  Design of a Flow Transmitter Using an Improved Inductance Bridge Network and Rotameter as Sensor , 2014, IEEE Transactions on Instrumentation and Measurement.

[14]  Kunal Chakraborty,et al.  Design of an Electronic Flow Transmitter Using LVDT & Hall Sensor , 2013 .

[15]  John P Bentley,et al.  Principles of measurement systems , 1983 .

[16]  Paul F. Beard,et al.  A novel experimental technique for accurate mass flow rate measurement , 2008 .

[17]  Sergio Silvestri,et al.  A high sensitivity fiber optic macro-bend based gas flow rate transducer for low flow rates: theory, working principle, and static calibration. , 2013, The Review of scientific instruments.

[18]  J Thibault,et al.  Calculation of the Pitot tube correction factor for Newtonian and non-Newtonian fluids. , 2003, ISA transactions.

[19]  Ke-Jun Xu,et al.  Development of Coriolis mass flowmeter with digital drive and signal processing technology. , 2013, ISA transactions.

[20]  R Abdul Rahim,et al.  Real time mass flow rate measurement using multiple fan beam optical tomography. , 2008, ISA transactions.