Non-contact measurement of water surface level from phase values of inductive measurements

Tan, Yee Mei; Yin, Wuliang; Peyton, A. J.

doi:10.1109/i2mtc.2012.6229527

Cited by 7 publications

(1 citation statement)

References 4 publications

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“…A method to implement point-level sensing using inductive sensors is presented in [ 25 ]. A similar approach using a linear array of inductive sensors is presented in [ 26 ]. A preliminary study on using planar coil-based inductive sensing techniques for level sensing is presented in [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of a Planar Coil-Based Inductive-Capacitive Water Level Sensor with a Quality-Detection Feature: An Experimental Study

Areekath

Lodha

Sahana

et al. 2022

Sensors

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This paper presents a new water-level-sensing mechanism based on planar coils fabricated on a printed circuit board (PCB). In addition to level, the sensor detects any relative increase in conductivity compared to that of clean water, which is an indicator of its quality. The sensing mechanism utilizes the eddy current induced in the water column, the corresponding change in the coil inductance, and the change in the turn-to-turn capacitance of the coil in the presence of water. Although several level sensors are available, there is none that gives the level and quality information using a single sensing element. Since both water quantity and quality measurements are fundamental in realizing efficient water and wastewater management, obtaining these two parameters from the same sensor is very beneficial. A scalable, planar coil-based sensor that helps achieve this goal is designed, fabricated, and tested in a laboratory setting. The results illustrate that the reactance of the sensor coil measured at a frequency (1 kHz for the prototype) much lower than the self-resonance of the coil gives reliable information about the level of water, while the measurement made at resonance, using an inductance-to-digital converter, is a clear indicator of its conductivity and, hence, quality.

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Section: Introductionmentioning

confidence: 99%