Hydrogen Density Measurements Using an Open-Ended Microwave Cavity

Wenger, N. C.; Smetana, J.

doi:10.1109/tim.1972.4313978

Cited by 15 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Examples are the endless thread of cigarettes in a cigarette machine, threads of yarn at weaving machines, paper webs, or even goods moving on conveyor belts, chutes, or flowing out of containers. The systems can be made selfoscillating [17] or can use electronic circuits for frequency control [18,19]. A frequency-tracking system for measuring resonant frequency and quality factor typically employs double modulation of a voltage-controlled oscillator (VCO).…”

Section: Frequency-tracking Systemmentioning

confidence: 99%

Technology and Signal Processing of Dielectrometric Microwave Sensors for Industrial Applications

Knöchel

2000

Sensors Update

View full text Add to dashboard Cite

Section: Frequency-tracking Systemmentioning

confidence: 99%

Technology and Signal Processing of Dielectrometric Microwave Sensors for Industrial Applications

Knöchel

2000

Sensors Update

View full text Add to dashboard Cite

“…19 Microwaves have been also proposed to determine gas density and void fractions in organic fluids. [20][21][22] These particular applications are based on the shift of the resonant frequency of a gas-liquid mixture placed inside a cavity which is a function of the dielectric properties of the medium. From variations in frequency is then possible to determine the average density of the medium, and thus, the void fraction.…”

Section: Introductionmentioning

confidence: 99%

Development and assessment of a microwave void-fraction measurement system

Pochet

Teyssedou

Akyel

2014

Review of Scientific Instruments

View full text Add to dashboard Cite

The proof of concept of a non-invasive reflection-type void measurement system using microwaves is developed. Before constructing the instrument, governing equations are used to perform numerical simulations of different electrical components (reflectometer, antenna, etc.). Design and preliminary calibrations are performed based on these simulations. The results are then used to manufacture a setup that is installed on a Plexiglas vertical tube containing known volumetric fractions of gas in water at atmospheric conditions. The amount of injected gas and water are accurately controlled and the response of the system is compared with the simulations which confirm the suitability of such a system to study two-phase water-air mixtures.

show abstract