**Tomography**- 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)
- 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)
- Electrical Capacitance Volume Tomography (ECVT) is a non-invasive 3D imaging technology applied primarily to multiphase flows. (wikipedia.org)
- It was first introduced by W. Warsito, Q. Marashdeh, and L.S. Fan as an extension of the conventional Electrical Capacitance Tomography (ECT). (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)
- 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)
- 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)
- Electrical capacitance tomography (ECT) has been used for more than a decade for imaging dielectric processes. (semanticscholar.org)
- Electrical Capacitance Tomography (ECT) has been developed as a non-invasive measurement technique and applied to study gas-solids fluidized beds. (whiterose.ac.uk)
- 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)
- 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)
- 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)
- Electrical capacitance tomography instruments released by the company include: m3000c, m3000dual (combines ERT measurements with ECT), and m3c. (wikipedia.org)
- 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)
- 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)
- He was named a Fellow of the Institute of Electrical and Electronics Engineers (IEEE) in 2012 for contributions to electrical capacitance tomography. (wikipedia.org)

**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)

**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)
- 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)

**flows**- 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)

**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)

**measurements**- 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)
- This dissertation presents a method of reconstructing images of high contrast dielectric materials using only the self capacitance measurements. (ucf.edu)
- 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)

**cell membrane**- The technician would position the glass pipette near a cell and apply the appropriate suction to create an electrical seal between the pipette and the cell membrane. (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)
- 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)

**dielectric**- Dielectric ElectroActive Polymers (DEAP) have the potential of converting mechanical energy into electrical energy. (andrews.edu)

**stray**- Harmful, high frequency stray electric currents are unavoidable in most current applications. (skf.com)

**measurement**- 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)

**equivalent**- A numerical model based on equivalent electrical networks has been built to simulate the dynamic behavior of a positive-displacement MEMS micropump dedicated to insulin delivery. (hindawi.com)
- The modeling of the fluid dynamics inside the device using electrical equivalent networks is provided in Section 3 . (hindawi.com)
- 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)

**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)

**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)

**thermal**- 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)

**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)

**readings**- 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)

**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)

**electrostatic**- An electrostatic pickup converts mechanical motion to an electrical signal by means of varying electrical capacitance. (wikipedia.org)
- 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)
- Electrostatic reed organ Everett Orgatron Compton organ Wurlitzer electric piano Hohner Pianet Miessner, Benjamin F. (1936). (wikipedia.org)

**unavoidable**- An aluminum plate having an aluminum purity of not less than 99.98% by mass and an Fe content of 5 to 50 ppm with the balance consisting of unavoidable impurities is used to realize increased capacitance of an aluminum electrolytic capacitor, reduced height, and improved high frequency characteristics. (google.com)

**change**- In 1939 it was reported that " Nervous messages are invariably associated with an electrical change known as the action potential ," representing day-one of electrophysiology and the dawning of neural stimulation ( Hodgkin and Hukley, 1939 ). (frontiersin.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)

**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)

**numerical**- 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)

**images**- Measured capacitance between plate combinations is used to reconstruct 2D images (tomograms) of material distribution. (wikipedia.org)

**displaystyle**- varepsilon \nabla \varphi )=0} where φ {\displaystyle \varphi } denotes the electric potential distribution. (wikipedia.org)
- 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)

**current**- The increase in information-processing performance could be referred to in other words as an increase in processing electrical current at higher frequencies. (google.com)
- 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)

**systems**- Zengerle and Richter have shown in 1994 that micropumps could be modeled using the equivalence between fluidic systems and electrical networks [ 1 ]. (hindawi.com)
- The technician is essentially performing a balancing act trying to watch and manipulate several systems simultaneously (motion, pressure, and electrical signals). (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)

**values**- Capacitance values of 1 pF or lower can be achieved by twisting two short lengths of insulated wire together. (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)

**light**- Corrigendum: Infrared light excites cells by changing their electrical capacitance. (nih.gov)

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

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

**interfaces**- It is shown that a complete 2D map of the electrical properties of device structure, including delineation of regrown interfaces and the electrical nature of the regrown GaInP layer can be obtained. (diva-portal.org)

**increase**- Overall, there was a small increase in the capacitance of the DEAP sample after the 3000 stress cycles but the capacitance never went above 2nF. (andrews.edu)

**work**- In this work, cross-sectional scanning capacitance microscopy (SCM) is used to investigate GaAs/AlGaAs buried heterostructure (BH) lasers regrown with semi-insulating GaInP:Fe. (diva-portal.org)

**cells**- 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)