scholarly journals Measurement of impedance and sensitivity of electroacoustic transducers

2019 ◽  
Vol XXII (1) ◽  
pp. 34-43
Author(s):  
Kolev N.
Keyword(s):  
Electrical Impedance ◽  
Pulse Method ◽  
Experimental Results ◽  
Sensitivity Measurement ◽  
Test Tank ◽  
Electroacoustic Transducer ◽  
Water Test ◽  
Measured Impedance

In the paper a methodology is presented for electroacoustic transducer impedance and transmitting sensitivity measurement. Loaded transducer electrical impedance is measured in water test tank. The methodology for measurement of transmitting sensitivity is based on the pulse method. Experimental results are presented for measured impedance and sensitivity of piezoceramic disc transducer in water filled test tank.

Induced current electrical impedance tomography system: experimental results and numerical simulations

2004 ◽  
Vol 25 (1) ◽  
pp. 239-255 ◽  
Author(s):  
Sharon Zlochiver ◽  
M Michal Radai ◽  
Shimon Abboud ◽  
Moshe Rosenfeld ◽  
Xiu-Zhen Dong ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Experimental Results ◽  
Induced Current ◽  
Impedance Tomography ◽  
Tomography System

scholarly journals Electrical Impedance and Proton Conductivity Studies of Polymer Electrolyte Materials

2019 ◽  
Vol 8 (4S2) ◽  
pp. 883-886
Keyword(s):  
Electrical Conductivity ◽  
Solid Electrolyte ◽  
Ftir Spectroscopy ◽  
Proton Conductivity ◽  
Electrical Impedance ◽  
Atmospheric Condition ◽  
Solution Casting ◽  
Impedance Data ◽  
Different Temperatures ◽  
Measured Impedance

Solid electrolyte at different composition of 50% PVA + 50 % PVP + x% NaH2PO2 are prepared using solution casting techniques. The prepared materials of polymer matrices are characterized through several techniques such as XRD, FTIR spectroscopy. The electrical conductivity of the sample is determined through measured impedance data at different frequencies and different temperatures. The electrical conductivity is calculated in the order of 10-8 Scm-1 . The water uptakencabability is also analysed. Proton conductivity is also analysed for vatious atmospheric condition.

A microcomputer-based precision impedance analyzer for measuring electrical impedance in plant tissues

1991 ◽  
Vol 71 (4) ◽  
pp. 1285-1288 ◽  
Author(s):  
M. I. N. Zhang ◽  
J. H. M. Willison
Keyword(s):  
Personal Computer ◽  
Electrical Impedance ◽  
Impedance Measurement ◽  
Impedance Spectrum ◽  
Plant Tissues ◽  
Impedance Data ◽  
Electrical Impedance Measurement ◽  
Measured Impedance ◽  
Lcr Meter ◽  
Precision Impedance Analyzer

A system for electrical impedance measurement in plant tissues has been built using a Hewlett Packard Precision LCR Meter controlled by a personal computer. This system is able to measure an impedance spectrum of 40 frequency points and automatically store the measured impedance data in the computer system within 30 s. Since this system is 1–2 orders more efficient than earlier systems for measuring impedance in plant tissues, it may have wide application in plant physiology. Key words: Electrical impedance, plant tissue, personal computer

scholarly journals Experimental Study on Backfilling Mine Goafs with Chemical Waste Phosphogypsum

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Zhiwei Cao ◽  
Bing Liu ◽  
Xibing Li ◽  
Diyuan Li ◽  
Longjun Dong
Keyword(s):  
Experimental Study ◽  
Resistance Coefficient ◽  
Experimental Results ◽  
Cemented Paste Backfill ◽  
Chemical Waste ◽  
Slump Test ◽  
Industrial Experiments ◽  
Paste Backfill ◽  
Water Test ◽  
Bleeding Water

To explore the feasibility of cemented paste backfill with phosphogypsum (PG), bleeding water and rheological tests (slump and on-site pipeline loop tests) were performed with PG backfill slurry (PGBS). In the bleeding water test, the PGBS concentration with minimal bleeding water was measured between 60.87 and 67.61%; in the rheological slump test, values of 61 to 68% were determined for the on-site pipeline loop test. The rheological pipeline loop test demonstrated that the resistance coefficient is lowest when the concentration is no higher than 65%. Through industrial experiments, PG slurry with a concentration of 64%–65% backfill was successfully applied to the goaf. The experimental results demonstrate that PGBS with characteristics of “less bleeding water” and “improved pumpability” is obtained when its concentration is between 61 and 65%. Paste-like PG slurry was proven to be optimal for cemented PG backfilling technology.

scholarly journals Electrical impedance spectroscopy (EIS) for biological analysis and food characterization: a review

2017 ◽  
Vol 6 (2) ◽  
pp. 303-325 ◽  
Author(s):  
Marco Grossi ◽  
Bruno Riccò
Keyword(s):  
Impedance Spectroscopy ◽  
Electrical Impedance ◽  
Inorganic Materials ◽  
Electrical Impedance Spectroscopy ◽  
Measured Impedance ◽  
Test Voltage ◽  
Automated Technique ◽  
And Behavior ◽  
Solid Liquid ◽  
Insight Into

Abstract. Electrical impedance spectroscopy (EIS), in which a sinusoidal test voltage or current is applied to the sample under test to measure its impedance over a suitable frequency range, is a powerful technique to investigate the electrical properties of a large variety of materials. In practice, the measured impedance spectra, usually fitted with an equivalent electrical model, represent an electrical fingerprint of the sample providing an insight into its properties and behavior. EIS is used in a broad range of applications as a quick and easily automated technique to characterize solid, liquid, semiliquid, organic as well as inorganic materials. This paper presents an updated review of EIS main implementations and applications.

Diagnostics of Gold Laser Plasmas

1988 ◽  
Vol 102 ◽  
pp. 357-360
Author(s):  
J.C. Gauthier ◽  
J.P. Geindre ◽  
P. Monier ◽  
C. Chenais-Popovics ◽  
N. Tragin ◽  
...  
Keyword(s):  
Experimental Results ◽  
Pure Gold ◽  
Electronic Temperature ◽  
X Ray ◽  
Laser Plasmas ◽  
Collisional Radiative Model ◽  
Radiative Model

AbstractIn order to achieve a nickel-like X ray laser scheme we need a tool to determine the parameters which characterise the high-Z plasma. The aim of this work is to study gold laser plasmas and to compare experimental results to a collisional-radiative model which describes nickel-like ions. The electronic temperature and density are measured by the emission of an aluminium tracer. They are compared to the predictions of the nickel-like model for pure gold. The results show that the density and temperature can be estimated in a pure gold plasma.

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