Study of a Modified Obstruction Free Pressure Sensor Based Flow Transducer Using Hall Sensors

Abstract

In the present paper, a modified obstruction free pressure sensor-based flow transducer has been developed using Hall sensors. This technique is a modified version of the earlier inductive method. In this transducer, the fluid pressure in the pipeline is taken as the flow sensing parameter, and various drawbacks of the earlier inductive technique are eliminated. A prototype unit of the transducer is developed and studied in the present work. The transducer consists of two identical C-type Bourdon gauges, each fitted with an identical permanent magnet and Hall sensor assembly to sense the fluid pressure under flow condition and static pressure under no flow condition. The difference between the two Hall sensor outputs is found to vary nonlinearly with flow rate. The mathematical relations describing the working of the prototype unit are derived in the paper. The static characteristic curves of the proposed flow transducer are determined experimentally and reported in the paper. The characteristic curves are found to follow the derived equations to a very good extent with negligible percentage deviation from best-fit nonlinear characteristic.

The Recent Progress and the State-of-Art Applications for Different Types of Hall Effect

“…As shown in Fig. 3, the uncertainty of the result is about 2×10-7 [14]. There are two main difficulties encountered in the process of improving its accuracy.…”

“…For low temperature case, the Hall resistance of the material increases with the increase of the magnetic field strength ρxy will take the quantized value and form a platform, while the longitudinal resistance ρxx will disappear. As a matter of fact, QHE provide indispensable basic theoretical background for science researches, which will be discussed in following subsections [14].…”

A New Design for Enhancing Highly Sensitive Interferometer Biosensor Using a Silicon Rib Waveguide

“…The integrated optical waveguide sensors in different structures have been reported recently, such as: the surface Plasmon resonator [1], Bragg grating based F-P microcavity [2,3], PhC microcavity [4,5], resonator based micro-disk [6,7], micro-ring resonator [8,9] and MZI [10,11]. Among these waveguide sensors, the MZI sensor has another highsensitivity device, which can be used as a biosensor.…”