Microwave mass flow meter for pneumatic conveyed particulate solids

Abstract

A particulates mass flow meter has been developed using a composite right/left-handed transmission line resonator. The presented sensor principle promises the possibility to design precise particulate solids mass flow meter with moderate costs. The Spatial Filter Velocimetry is applied to the sensor in order to detect the velocity information. The simultaneous detection of the velocity and the solids/air concentration from a single measurement, ensure a true mass flow detector. The detector offers good prospects for industrial applications with various scenarios of gas/solids, gas/liquid and liquid/solids flows.Index Terms-Composite right/left-handed metamaterial, permittivity measurement, pneumatic conveying, spatial filtering velocimetry, transducers, mass flow meters.

Non-Invasive Determination of the Mass Flow Rate for Particulate Solids Using Microwaves

“…In designing the metamaterial-based sensor, several contemporary designs were evaluated. The operation of metamaterial-based sensors typically falls into one of three categories: metasurfaces [ 13 ], metamaterial antennas [ 14 ], or metamaterial couplers [ 15 ]. To identify the most suitable design for mass flow determination, other design goals were taken into consideration.…”

Mass-Flow-Rate Measurement of Pneumatically Conveyed Particles Through Acoustic Emission Detection and Electrostatic Sensing

“…Over the years, a diverse range of techniques and instruments have been developed and proposed to tackle this challenge. The physical sensing principles of these methods include optical [4,5], process tomography [6,7], microwave [8,9], ultrasonic/acoustic [10][11][12][13] and electrostatic [14][15][16][17] techniques. Laser Doppler technique is a classic method for particle velocity and concentration measurement [4], but it is impractical to apply in coal fired power plants due to the contamination of optical components by fine dust and high maintenance cost.…”

Detection of solid contaminants in gas flows using microwave resonant probes

“…Numerous methodologies are available to measure solid particulate concentration and velocity in multi-phase flows. Electromagnetic (EM) resonance [5,7,16,21], microwave power attenuation [2,3,22] and the Doppler effect [23,24] are well-known techniques for solid concentration measurement, while spatial filtering [25] and Doppler radar [26,27] or cross-correlation [12,28] are employed for velocity computation. A thorough comparison of various microwave sensing techniques for concentration and velocity measurements in multiphase flows is reported in [11,20,[29][30][31][32].…”