DSPIC-Based Impedance Measuring Instrument

Santos, J.V. Araújo dos; Ramos, Pedro M.

doi:10.2478/v10178-011-0002-0

Cited by 17 publications

(9 citation statements)

References 5 publications

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“…The equivalent impedance of the viscosity sensor was measured using the developed impedance measurement system described in [29]. The system uses a four-wire impedance measurement setup and is based on a digital signal peripheral interface controller as a central processing unit.…”

Section: Measurement Resultsmentioning

confidence: 99%

Gene Expression Programming in Sensor Characterization: Numerical Results and Experimental Validation

Janeiro

Santos

Ramos

2013

IEEE Trans. Instrum. Meas.

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In this paper, impedance spectroscopy, gene expression programming (GEP), and genetic algorithms are combined to perform sensor characterization. The process presented is useful when there is no knowledge of the sensor equivalent circuit, and a set of impedance responses can be obtained for different measurand values. These responses are used by the algorithm to determine a suitable equivalent circuit and choose a circuit component that describes the measurand values. From this component, interpolation is used to infer the measurand value from the measured frequency responses. Improvements on the application of GEP to impedance characterization are presented. The method is validated through its application to numerical results of a humidity sensor and measurement results of a viscosity sensor.

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Section: Measurement Resultsmentioning

confidence: 99%

Gene Expression Programming in Sensor Characterization: Numerical Results and Experimental Validation

Janeiro

Santos

Ramos

2013

IEEE Trans. Instrum. Meas.

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“…The input voltage of the device is determined by high potential (Hp) lead. The Hp lead is separated from high current (Hc) lead, is the output terminal [5]. Isolation is useful in accurate determination of voltage across an unknown device.…”

Section: Methods and Methodologymentioning

confidence: 99%

Examination of a Fabricated Impedance Meter by Analysing the Electrical Properties of Ni0.65Zn0.35Fe2O4 (Ferro-Magnetic) Material

2019

IJITEE

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Impedance (Z) may be defined as the total opposition by a component (or electronic material) that offers to the AC (alternating current) at an applied signal frequency, parameters of impedance are utilized to analyze materials/electronic components characteristics. Impedance/LCR measuring instrumentation are costly or either do not enough accuracy and may have limited frequency range. There are many impedance measurement methods, each of which has their own pros and cons. While considering factors like frequency range, measurement band width, accuracy in measurement and its ease of operation, there is no single impedance measurement instrument that includes all these parameters. This research article describes a handy/portable impedance meter that depends on auto balancing bridge technique, which is capable of making impedance parameter measurements up to 20 Mhz frequency. An analog frequency generator was made up of max038 (IC) which stimulates the impedance measurement circuit that was composed of reference and also the impedances that are unknown. The applied frequency through the impedances (electronic materials) and their electronic parametrics like inseries inductance (Ls), inparallel capacitance (Cp) and inseries resistance (Rs) along with some sub-parameters were first digitalized and then displays. The fabricated impedance meter’s performance was analysed by correlating the results obtained by it, with the results of a commercially available impedance instrument-the Newton 4 th limited, NumetriQ, Model no. PSM-1735, for different composite electronic materials, some of them are multi-ferrites, ferroelectric and ferro-magnetic, materials. For every material, the error percentage was analysed; which is less than 3% was observed. In this paper, Ni0.65Zn0.35Fe2O4 -Ferro-magnetic material’s both thermal properties and electrical properties were analysed by fabricated and by the commercial instruments. Results are tabulated and then graphs are plotted.

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“…In case of sensors, the total cost of the device, circuit dimensions and power consumption should be kept as small as possible mainly due to economic reasons. The above presented guidelines lead to searching for new methods which allow to simplify impedance measurement instruments, allowing further simplification and miniaturization than solutions presented in [9][10][11]. The previous works in the author's team were addressing this problem by reducing the number of samples taken into calculations [12].…”

Section: Introductionmentioning

confidence: 99%

Using A Particular Sampling Method for Impedance Measurement

Lentka¹

2014

Metrology and Measurement Systems

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The paper presents an impedance measurement method using a particular sampling method which is an alternative to DFT calculation. The method uses a sine excitation signal and sampling response signals proportional to current flowing through and voltage across the measured impedance. The object impedance is calculated without using Fourier transform. The method was first evaluated in MATLAB by means of simulation. The method was then practically verified in a constructed simple impedance measurement instrument based on a PSoC (Programmable System on Chip). The obtained calculation simplification recommends the method for implementation in simple portable impedance analyzers destined for operation in the field or embedding in sensors.

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DSPIC-Based Impedance Measuring Instrument

Cited by 17 publications

References 5 publications

Gene Expression Programming in Sensor Characterization: Numerical Results and Experimental Validation

Gene Expression Programming in Sensor Characterization: Numerical Results and Experimental Validation

Examination of a Fabricated Impedance Meter by Analysing the Electrical Properties of Ni0.65Zn0.35Fe2O4 (Ferro-Magnetic) Material

Using A Particular Sampling Method for Impedance Measurement

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