Impedance measurements of coating properties on bridge structures

Bordziłowski, J.; Darowicki, Kazimierz; Krakowiak, Stefan; Królikowska, A.

doi:10.1016/s0300-9440(02)00193-5

Cited by 15 publications

(7 citation statements)

References 16 publications

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“…on bridges, pipelines, high-voltage pylons (Fig. 1), in order to decide whether the coating is in good condition or in a bad state requiring renovation [14]. The coating impedance measurement is performed in the area limited by a measurement cell filled with 3% water solution of NaCl, between a platinum electrode located in the cell and metal surface protected by the anticorrosion coating.…”

Section: Anticorrosion Coating Spectroscopymentioning

confidence: 99%

A Family of New Generation Miniaturized Impedance Analyzers for Technical Object Diagnostics

Hoja¹,

Lentka²

2013

Metrology and Measurement Systems

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The paper presents the family of three analyzers allowing to measure impedance in the range of 10 Ω<|Z x |<10 GΩ in a wide frequency range from 10 mHz up to 100 kHz. The most important features of the analyzer family are: miniaturization, low power consumption, low production cost, telemetric controlling and the use of an impedance measurement method based on digital signal processing (DSP). The miniaturization and other above-mentioned features of the analyzers were obtained thanks to the use of the newest generation of large-scale integration chips: e.g. "system on a chip" microsystems (AD5933), 32-bit AVR32-family microcontrollers and specialized modules for wireless communication using the ZigBee standard. When comparing metrological parameters, the developed instrumentation can equal portable analyzers offered by top worldwide manufacturers (Gamry, Ivium) but outperforms them on smaller dimensions, weight, a few times lower price and the possibility to work in a distributed telemetric network. All analyzer versions are able to be put into medium-volume production.

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Section: Anticorrosion Coating Spectroscopymentioning

confidence: 99%

A Family of New Generation Miniaturized Impedance Analyzers for Technical Object Diagnostics

Hoja¹,

Lentka²

2013

Metrology and Measurement Systems

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“…The IS allows determining protective features of the anticorrosion coatings on objects directly in the field, e.g. bridges, pipelines, high-voltage pylons, in order to decide whether the coating is in good or bad condition requiring renovation [18]. Thus, for the method simulation tests and experimental verification, the four-element two-terminal RC network shown in Fig.…”

Section: Usb -mentioning

confidence: 99%

Fast High-Impedance Spectroscopy Method Using Sinc Signal Excitation

Kowalewski

Lentka

2013

Metrology and Measurement Systems

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In this paper the method of fast impedance spectroscopy of technical objects with high impedance (|Z x | ≥ 1 GΩ) is evaluated by means of simulation and a practical experiment. The method is based on excitation of an object with a sinc signal and sampling the response signals proportional to current flowing through and voltage across the measured impedance. The object's impedance spectrum is obtained with the use of continuous Fourier transform on the basis of linear approximations between samples in two acquisition sections, connected with the duration of the sinc signal. The method is first evaluated in MATLAB by means of simulation. An influence of the sinc signal duration and the number of samples on impedance modulus and argument measurement errors is explored. The method is then practically verified in a constructed laboratory impedance spectroscopy measurement system. The obtained acceleration of impedance spectroscopy in the low frequency range (below 1 Hz) and the decrease of the number of acquired samples enable to recommend the worked out method for implementation in portable impedance analyzers destined for operation in the field.

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“…1a, and a crosssection of the coating and the cell in Fig. 1b [11]. When the coating is new and the protection is based on the barrier mechanism, there is no penetration of electrolyte into the coating and the equivalent circuit contains only two elements: capacitance C c (of the order of a few tens to a few hundreds pF) and resistance R p (a few, up to several hundreds G ) modelling properties of the material of the coating (the electrolyte resistance R e is much smaller and practically negligible).…”

Section: Equivalent Circuit Modelmentioning

confidence: 99%