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Design of a flow transmitter using an improved inductance bridge network and rotameter as sensor
Published in Institute of Electrical and Electronics Engineers Inc.
Volume: 63
Issue: 12
Pages: 3127 - 3136
A rotameter is a variable area type flow sensor. It is generally used as a local indicator and display unit. Hence, a special technique is needed to transmit and to display the reading of a rotameter at a remote distance. In this paper, an improved inductance bridge-type technique has been developed to convert the float movement of the rotameter into an electrical current signal, which can be transmitted to a remote indicator. A straight ferromagnetic wire attached to the float of the rotameter acts as a sensing element of the proposed rotameter transducer. The movement of the wire as a result of fluid flow variations inside an inductive pickup coil changes the self-inductance of the coil with the changes in flow rate. An improved inductance bridge network has been used to measure the self-inductance of the coil. It has been observed that the variation of the self-inductance of the pickup coil as well as the variation of the transducer and transmitter outputs with flow rate has a very good linearity and repeatability. The necessary theoretical equations, along with the experimental results, are reported in this paper. © 2014 IEEE.
About the journal
JournalData powered by TypesetIEEE Transactions on Instrumentation and Measurement
PublisherData powered by TypesetInstitute of Electrical and Electronics Engineers Inc.