Computer-Based Acoustic Detector for Determining the Type and Concentration of a Solution

Abstract

The problem of determining the type and concentration of a solution is an important issue in food, medicaland chemical industries. In this paper, a work effort has been made to explore the possibility of designinga computer-based acoustic detector to determine the type and concentration of a solution. Signalconditioning and processing was carried out by using labVIEW (G Language) VIs. Experimental resultsshow that the produced acoustic signal frequency can be used as an informative parameter related withthe type and concentration of a solution. Also, linear range of measurement is found of 10g/100ml.Furthermore, acceptable results for common industrial applications are drawn with a maximum percentageerror of 3% compared with the conventional approach. As a result, such detector can be integrated withcontrol system in order to perform some control actions.

U-shape Acoustic Liquid Densitometer

“…The proposed approach is based on creating a standing wave within a tube in free resonance mode. The work [15] shows that a free mode of standing wave generation is used to measure the concentration of salts, the speed of sound is measured and a relationship between the concentration of the salt in the sample and the speed of sound is obtained. The same approach will be utilized to measure the density of the sample under test will be utilized.…”

“…Hydrostatic densitometers are capable to measure density by measuring the pressure of the liquid column of constant height. The density has a linear relationship with the measured hydrostatic pressure [14][15]. The operation principle of vibrating densitometers is based on measuring the resonance frequency (excited by a vibration source -transmitter) which is a function of the density of the tested liquid [16].…”

“…The method based on measuring the frequency of transmitted acoustic signal within a U-shape tube filled by the liquid sample. In work, it was shown waves can be transmitted within a tube filled by a liquid or gas under the following three conditions [15,22]:…”

A Methodology to Measure СP / CV Ratio Using U-shape Acoustic Resonance Tube

“…Other works [14][15][16][17] illustrate several techniques, based on acoustic measurement that are applicable to measure several physical and chemical parameters such as: density of gases, temperature, displacement and concentration. These methods are based on creating a standing wave within a resonance tube (forced or free resonance mode of operation) and then the physical phenomenon based on acoustic measurement is acquired by a microphone and signal processing is performed using LabVIEW software [16].…”

Design and Implementation of Myoelectric Controlled Arm

“…In their article (Younes, 2012), the authors introduce a fully integrated preinstalled artificial arm equipped with a human-machine feedback system. The artificial arm consists of five fingers.…”