###### derived unit of electrical capacitance

- The farad is an SI derived unit of electrical capacitance. (wikipedia.org)
- The farad (symbol: F) is the SI derived unit of electrical capacitance, the ability of a body to store an electrical charge. (wikipedia.org)

###### impedance

- M. Vauhkonen: Electrical impedance tomography and prior information: PHD Thesis (University of Kuopio, Finland 1996). (scientific.net)
- K.Y. Kim, B.S. Kim, M.C. Kim, Y.J. Lee and M. Vauhkonen: Image reconstruction in time-varying electrical impedance tomography based on the extended Kalman filter. (scientific.net)
- M.C. Kim, K.Y. Kim, S. Kim, H. J. Lee and Y. J. Lee: Electrical Impedance Tomography Technique for the visualization of the phase distribution in an annular tube. (scientific.net)
- It is a close relative of electrical impedance tomography and is proposed as a method for industrial process monitoring, although it has yet to see widespread use. (wikipedia.org)
- Electrical capacitance volume tomography Electrical impedance tomography Electrical resistivity tomography Industrial Tomography Systems Process tomography M Soleimani, W R B Lionheart, Nonlinear image reconstruction in electrical capacitance tomography using experimental data, Meas. (wikipedia.org)
- Soft-field tomography refers to a set of imaging modalities such as electrical capacitance tomography (ECT), electrical impedance tomography (EIT), electrical resistivity tomography (ERT), etc., wherein electric (or magnetic) field lines undergo changes in the presence of a perturbation in the medium. (wikipedia.org)
- The charge/discharge circuit can only measure the mixed impedance, not true capacitance when loss conductance presents. (ect-instruments.com)
- Industrial Tomography Systems' instrumentation that utilizes the principles of electrical impedance tomography & electrical resistance tomography (the two terms are often used interchangeably) include: z8000, p2+, and v5r. (wikipedia.org)

###### sensor

- ECVT exploits this fringing field and expands it through 3D sensor designs that deliberately establish an electric field variation in all three dimensions. (wikipedia.org)
- In this paper a software method for electrical capacitance sensor design of electrical capacitance tomography system is presented by using finite element analysis techniques. (spie.org)
- Electrical capacitance sensor theory model is established, and capacitance sensitivity field distribution and structure parameters of the sensor to measurement effect are analyzed by the method. (spie.org)
- The optimized design and simulation of electrical capacitance sensor is based on the method, and performances of electrical capacitance sensor are improved clearly, satisfactory images can be reconstructed by using the capacitance sensitivity distributions as a priori information. (spie.org)
- The performance of an electrical capacitance tomography (ECT) sensor is usually evaluated by static experiment with solid material(s) for some typical distributions encountered in 2-section flows. (mtechprojects.com)
- The time-varying permittivity distributions and capacitance knowledge are obtained from the computational simulation based on the coupling model to analyze the performance of the ECT sensor and image reconstruction. (mtechprojects.com)

###### resistance

- This work examined the electrical properties of DEAP, in which the capacitance and the electrode resistance were affected by repeated stress relaxation cycles. (andrews.edu)
- The capacitance of each sample and the resistance of one electrode layer were measured in both the relaxed position and the stressed position, once per interval. (andrews.edu)
- The 10% stress sample's capacitance and resistance had an increase of 6% and 4% respectively at 3000 cycles. (andrews.edu)
- Based on electrical resistance tomography, this new measurement system can take data independent of flow regime and also concentration of measure materials which are neutrally buoyant. (wikipedia.org)
- Modern electronic devices use temperature of condensation (the dew point), or changes in electrical capacitance or resistance to measure humidity differences. (wikipedia.org)
- For tree structured networks, find the delay through each segment as the R (electrical resistance) times the downstream C (electrical capacitance). (wikipedia.org)
- It was developed as a mathematical analog of electrical capacitance, although it also includes thermal analogs of electrical resistance as well. (wikipedia.org)
- As names for units of various electrical quantities, Bright and Clark suggested "ohma" for voltage, "farad" for charge, "galvat" for current, and "volt" for resistance. (wikipedia.org)
- See: Latimer Clark and Sir Charles Bright (1861) "On the formation of standards of electrical quantity and resistance," Report of the Thirty-first Meeting of the British Association for the Advancement of Science (Manchester, England: September 1861), section: Mathematics and Physics, pp. 37-38. (wikipedia.org)
- Latimer Clark and Sir Charles Bright (November 9, 1861) "Measurement of electrical quantities and resistance," The Electrician, 1 (1) : 3-4. (wikipedia.org)
- The capacitance usually decreases and the equivalent series resistance (ESR) usually increases. (wikipedia.org)
- Using a micromanipulator, the pipette is moved towards the cell until the technician sees a change in the electrical resistance between the fluid inside of the pipette and the surrounding fluid (see animation). (wikipedia.org)

###### electrodes

- The measurement electrodes, which are metallic plates, must be sufficiently large to give a measureable change in capacitance. (wikipedia.org)
- Two metal electrodes held at different electric potential V {\displaystyle V} and separated by a finite distance will induce an electric field E {\displaystyle E} in the region between and surrounding them. (wikipedia.org)
- Prior to the actual measurements, a calibration and normalization procedure is necessary to cancel out the effects of stray capacitance and any insulating wall between the electrodes and the region of interest to be imaged. (wikipedia.org)
- The FEA analysis demonstrated that with change of relative permittivity in the DPF due to soot plugging can be estimated by measuring the electrical potential across electrodes. (sae.org)
- Electrical Capacitance Tomography (ECT) is a method to determine the material distribution within the interior of a closed object by measuring the capacitance values across externally mounted electrodes. (asme.org)
- Traditionally, an AC excitation pulse is applied to a pair of electrodes that form a capacitor during each measurement step, in order to determine the capacitance from the output current measured. (asme.org)
- This paper investigates how the speed of inter-electrode capacitance measurement can be improved by comparatively studying three methods that affect the way electrodes are excited and signals are received: 1) multiple-excitation-single-receiving, 2) single-excitation-multiple-receiving, and 3) multiple-excitation-multiple-receiving. (asme.org)
- Simulations using ECT sensors with 8 and 12-electrodes have shown that measurement speed can be increased by up to 3 ∼ 30 times as compared to the traditional mode of capacitance measurement. (asme.org)
- Industrial Tomography Systems' scanning technology works on a similar principle to CAT scanners that are used in hospitals to see inside the human body: by passing an electric current very rapidly between pairs of electrodes that are in contact with the process media, real-time images of the industrial process can be extrapolated from measuring the resulting difference in voltages. (wikipedia.org)

###### flows

- T. Dyakowski, L.F.C. Jeanmeure and A. J. Jaworski : Applications of electrical tomography for gas-solids and liquid-solids flows -a review. (scientific.net)
- Electrical Capacitance Volume Tomography (ECVT) is a non-invasive 3D imaging technology applied primarily to multiphase flows. (wikipedia.org)
- As a result of the changing capacitance, a varying current flows into or out of the plates as needed to maintain the proper charge for the new amount of capacitance. (wikipedia.org)

###### nonlinear

- W. Fang: A nonlinear image reconstruction algorithm for electrical capacitance tomography. (scientific.net)
- Abstract: The effects of Pr on the microstructure and nonlinear electrical properties of the (Co,Ta)-doped SnO2 varistors were investigated. (scientific.net)

###### distributions

- An Electrical Capacitance Volume Tomography system has been created for use with a new image reconstruction algorithm capable of imaging high contrast dielectric distributions. (ucf.edu)
- Typical electrical capacitance tomography (ECT) systems rely solely on mutual capacitance readings to reconstruct images of dielectric distributions. (ucf.edu)

###### permittivity

- In this paper, we propose a dynamic Electrical Capacitance Tomography (ECT) image reconstruction algorithm based on the extended Kalman filter (EKF) to estimate the rapidly time-varying changes in the permittivity within the time taken to acquire a full set of independent measurement data. (scientific.net)
- Electrical capacitance tomography (ECT) is a method for determination of the dielectric permittivity distribution in the interior of an object from external capacitance measurements. (wikipedia.org)
- These instruments are used when the phases in a process are non-conducting, with readings instead based upon electrical permittivity rather than electrical conductivity. (wikipedia.org)

###### Capability

- The capability of SCM to achieve complete electrical characterization of complex optoelectronic devices is then established using BH GaAs based lasers as an example. (diva-portal.org)

###### dielectric

- Electrical capacitance tomography (ECT) has been used for more than a decade for imaging dielectric processes. (semanticscholar.org)
- Electrical capacitance tomography (ECT) is an imaging technique for visualising industrial processes containing dielectric materials. (ect-instruments.com)
- This dissertation presents a method of reconstructing images of high contrast dielectric materials using only the self capacitance measurements. (ucf.edu)
- Dielectric ElectroActive Polymers (DEAP) have the potential of converting mechanical energy into electrical energy. (andrews.edu)

###### capacitors

- Modern capacitors are constructed using a range of manufacturing techniques and materials to provide the extraordinarily wide range of capacitance values used in electronics applications from femtofarads to farads, with maximum-voltage ratings ranging from a few volts to several kilovolts. (wikipedia.org)

###### discharge

- In 1991, the first real-time ECT system was developed, based on a charge/discharge capacitance measuring circuit and Transputers. (ect-instruments.com)

###### finite

- In this paper, an electromagnetic finite element analysis is performed to study the feasibility of Electrical Capacitance Tomography (ECT) method to estimate soot load amount in a diesel particulate filter (DPF). (sae.org)

###### equivalent

- The statfarad (abbreviated statF) is a rarely used CGS unit equivalent to the capacitance of a capacitor with a charge of 1 statcoulomb across a potential difference of 1 statvolt. (wikipedia.org)

###### dynamical

- Sir W. Thomson, etc. (1873) "First report of the Committee for the Selection and Nomenclature of Dynamical and Electrical Units," Report of the 43rd Meeting of the British Association for the Advancement of Science (Bradford, September 1873), pp. 222-225. (wikipedia.org)

###### Conduction

- The lumped capacitance model is a common approximation in transient conduction, which may be used whenever heat conduction within an object is much faster than heat transfer across the boundary of the object. (wikipedia.org)

###### Instrumentation

- Wuqiang Yang (born c.1960) is a Chinese engineer who is currently Professor of Electronic Instrumentation at the University of Manchester, UK, where he specialises in electrical capacitance tomography (ECT). (wikipedia.org)

###### voltage

- The BK channel derives its voltage dependence from four voltage-sensing (J) domains located within the membrane electric field, and also to a small degree from the pore (L) itself. (rupress.org)
- A high voltage is applied between the stationary and moving plates to produce an electric field. (wikipedia.org)
- The thermoelectric effect is the direct conversion of temperature differences to electric voltage and vice versa via a thermocouple. (wikipedia.org)

###### Farad

- One farad is defined as the capacitance across which, when charged with one coulomb, there is a potential difference of one volt. (wikipedia.org)
- Equally, one farad can be described as the capacitance which stores a one-coulomb charge across a potential difference of one volt. (wikipedia.org)
- For most applications, the farad is an impractically large unit of capacitance. (wikipedia.org)
- The term "farad" was originally coined by Latimer Clark and Charles Bright in 1861, in honor of Michael Faraday, for a unit of quantity of charge but by 1873, the farad had become a unit of capacitance. (wikipedia.org)
- In 1881 at the International Congress of Electricians in Paris, the name farad was officially used for the unit of electrical capacitance. (wikipedia.org)

###### Mechanical

- An electrostatic pickup converts mechanical motion to an electrical signal by means of varying electrical capacitance. (wikipedia.org)
- Humidity measurement instruments usually rely on measurements of some other quantity such as temperature, pressure, mass or a mechanical or electrical change in a substance as moisture is absorbed. (wikipedia.org)

###### distribution

- Measured capacitance between plate combinations is used to reconstruct 2D images (tomograms) of material distribution. (wikipedia.org)
- varepsilon \nabla \varphi )=0} where φ {\displaystyle \varphi } denotes the electric potential distribution. (wikipedia.org)
- This study has provided useful information of the effect of pipe inclination on void fraction distribution using electrical capacitance tomography (ECT) data. (edu.ng)

###### temperature

- A lumped capacitance model, also called lumped system analysis, reduces a thermal system to a number of discrete "lumps" and assumes that the temperature difference inside each lump is negligible. (wikipedia.org)

###### change

- This is in contrast to hard-field tomography, such as X-ray CT, where the electric field lines do not change in the presence of a test subject. (wikipedia.org)
- The shape, size and position of the fixed plate relative to the reed has an effect on the capacitance change as a function of the reed's instantaneous position during its travel. (wikipedia.org)

###### consists

- The electrode geometry consists of two 4 x 4 parallel planes of copper conductors connected through custom built switch electronics to a commercially available capacitance to digital converter. (ucf.edu)

###### images

- Although capacitance sensing methods were in widespread use the idea of using capacitance measurement to form images is attributed to Maurice Beck and co-workers at UMIST in the 1980s. (wikipedia.org)

###### moisture

- During his time at KMITL, Sitthichai developed a rice moisture monitor based on electrical capacitance. (wikipedia.org)

###### changes

- The position of the fixed plate in the Pianet is such that the capacitance changes most dramatically when the reed is in the upper portion of its travel. (wikipedia.org)

###### charge

- The second is the electrical capacitance energy W C [ q ] , representing "global" gating charge displacement, and is equal to the product of total gating charge per channel times the first moment ( V M ) of normalized capacitance (slope of Q-V curve). (rupress.org)
- The relationship between capacitance, charge and potential difference is linear. (wikipedia.org)
- It is the accumulation of electric charge on the plates that results in capacitance. (wikipedia.org)

###### method

- Automated patch clamping is beginning to replace manual patch clamping as a method to measure the electrical activity of individual cells. (wikipedia.org)

###### values

- This was based on numerical simulations to ensure that the measured capacitance values are within the detectable range of the ECT system. (whiterose.ac.uk)
- Capacitance values of 1 pF or lower can be achieved by twisting two short lengths of insulated wire together. (wikipedia.org)

###### current

- This was because the electron energy levels in each metal shifted differently and a potential difference between the junctions created an electrical current and therefore a magnetic field around the wires. (wikipedia.org)

###### displaystyle

- The capacitance C {\displaystyle C} is a measure of electric energy W {\displaystyle W} stored in the medium, which can be quantified via the following relation: W = 1 2 ∫ ε E 2 d v = 1 2 C V 2 {\displaystyle W={\frac {1}{2}}\int _{}^{}\varepsilon E^{2}\,dv={\frac {1}{2}}CV^{2}} where E 2 {\displaystyle E^{2}} is the square magnitude of the electric field. (wikipedia.org)

###### Systems

- The technician is essentially performing a balancing act trying to watch and manipulate several systems simultaneously (motion, pressure, and electrical signals). (wikipedia.org)

###### measure

- In the case of cells in suspension, the pipette is completely replaced with a microchip with holes that can create gigaseals and measure the electrical activity. (wikipedia.org)

###### model

- The 2 models are coupled by an extra electric force in the momentum conservation equation within the mixture model. (mtechprojects.com)

###### effect

- A sensitivity map was created illustrating the effect a clogged filter on the internal electric field of the filter. (sae.org)

###### electronics

- He was named a Fellow of the Institute of Electrical and Electronics Engineers (IEEE) in 2012 for contributions to electrical capacitance tomography. (wikipedia.org)

###### plates

- The electrostatic pickup used in the Hohner Pianet N electric piano has a fixed plate mounted at a 90 degree angle to the reed, while the fixed plates used in Wurlitzer electrostatic organs are parallel to the reed. (wikipedia.org)

###### Technique

- Electrical Capacitance Tomography (ECT) has been developed as a non-invasive measurement technique and applied to study gas-solids fluidized beds. (whiterose.ac.uk)

###### plate

- The capacitance of the pickup is changed by the motion of the moving plate. (wikipedia.org)

###### circuit

- The lumped matter discipline is a set of imposed assumptions in electrical engineering that provides the foundation for lumped circuit abstraction used in network analysis. (wikipedia.org)