Abstract
This paper presents the design of an instrument for measuring the liquid level. The objective of this proposed work is to measure the level of liquid accurately even with variations in liquid concentration. The designed instrument should also be able to compute the concentration of additives in the liquid. For this purpose, a multisensor model comprising a capacitive level sensor (CLS), ultrasonic level sensor (ULS), and capacitance pressure sensor is used to acquire information of the liquid. The data acquired from all these sensors are processed using Pau’s multisensor data fusion framework to compute the level of liquid along with the concentration of additives added to the solution. Pau’s framework consists of alignment, association function, analysis, and representation functions. The designed multisensor technique is tested with real-life data for varying liquid levels and additives. The results obtained show that the successful implementation of the proposed objective producing a root mean square of percentage error is 1.1% over the full scale is possible.
Highlights
The level process is one of the most commonly found processes in any process industry, like the diary, pharmacy, fabric, petroleum, and confectionary
Many measurement techniques are available for liquid level measurement; a detailed study of available measurement techniques is reported
A technique for liquid level measurement using multiple capacitive sensors to increase the sensitivity of measurement is reported in [2]
Summary
The level process is one of the most commonly found processes in any process industry, like the diary, pharmacy, fabric, petroleum, and confectionary. An instrument is needed to measure the actual liquid level. A technique for liquid level measurement using multiple capacitive sensors to increase the sensitivity of measurement is reported in [2]. Analysis of capacitive liquid level sensor characteristics for fuel measurement in a level control process used in the upper-stage rocket system is reported in [3]. Image processing technique used to compute the level of liquid from the captured image of the container is reported in [6, 7]. Paper [9] discusses the technique of liquid level measurement based on the reflective principle of light. Paper [12] reported the analysis of radiated frequency-modulated millimeter wave through a container with liquid for measurement of liquid level measurement. In [14], refractive index analysis via coreless multimode fiber is carried on to compute
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