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Автор: Grafiati

Опубліковано: 23 лютого 2024

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1

Vu, Hoang Yen, and A. N. Zyablov. "Application of MIP-sensors to the determination of preservatives in non-alcoholic drinks." Industrial laboratory. Diagnostics of materials 88, no. 8 (August 21, 2022): 10–16. http://dx.doi.org/10.26896/1028-6861-2022-88-8-10-16.

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The piezosensors modified with a molecularly imprinted polymer (MIP) with potassium sorbate (MIP-E202) and sodium benzoate (MIP-E211) imprints are tested and implemented in the determination of preservatives in soft drinks. Molecularly imprinted polymers were synthesized by noncovalent imprinting on the base of copolymer of 1,2,4,5-benzene tetracarboxylic acid dianhydride and 4,4’-diaminodiphenyl oxide in N,N-dimethylformamide (DMF) in the presence of templates. Piezoelectric sensors based on MIP and non-imprinted polymer (polyimide) were compared. High values of the imprinting factor (IF) and selectivity coefficient (k) obtained for MIP-E202 (IF = 5.4) and MIP-E211 (IF = 6.0) sensors indicated better selectivity and ability of MIP-based sensors to recognize target molecules than piezosensors modified with a reference polymer. The detectable concentrations range within 5 – 500 mg/liter, the detection limits for potassium sorbate and sodium benzoate are 1.6 and 2.0 mg/liter, respectively. Correctness of the preservative determination in model solutions was verified using the spike test. MIP-based sensors appeared sensitive to the preservative determination and insensitive to interfering substances. The matrix composition of the non-alcoholic drinks did not affect the value of the analytical signal of the piezoelectric sensor. High performance liquid chromatography (HPLC) was used as a reference method. The results of potassium sorbate and sodium benzoate determination in non-alcoholic drinks using piezosensors match the HPLC data rather well, their content in the studied soft drinks being 130 – 176 and 129 – 146 mg/liter, respectively.

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2

Vu, Hoang Yen, and A. N. Zyablov. "Determination of preservatives in liquids by piezosensors." Аналитика и контроль 26, no. 2 (2022): 134–40. http://dx.doi.org/10.15826/analitika.2022.26.2.001.

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In the current study, piezosensors based on the molecularly imprinted polyimides with imprints of potassium sorbate and sodium benzoate were obtained. Molecularly Imprinted Polymers (MIPs) were synthesized using a polyimide and a non-covalent imprinting technique. It was established that the use of 0.1 g/mL template concentration at the thermochemical stage led to the formation of the maximum number of molecular imprints on the film surface. Using the scanning force microscopy, it was found that the reference polymer film had a uniform surface with a small height difference from 1.4 to 2.6 nm (including 88.94 % of pores with a radius of up to 10 nm) and had good film thickness reproducibility. The surface morphology of films of molecularly imprinted polymers with imprints of potassium sorbate and sodium benzoate had more developed surface, which was associated with the peculiarities of the formation of imprints. In this work, imprinting factor (IF) and selectivity coefficient (k) of the sensor were calculated. Molecularly imprinted polymers had better selectivity, sensitivity, and ability to recognize target template molecules than the reference polymers (non-imprinted polymers). Molecularly imprinted polymer-modified piezoelectric sensors (MIP sensors) have been used to analyze potassium sorbate and sodium benzoate in non-alcoholic drinks. The linear concentration range was identified to be 5 - 500 mg/L and the limit of detection for potassium sorbate and sodium benzoate were 1.6 mg/L and 2 mg/L, respectively. The determination of potassium sorbate and sodium benzoate in non-alcoholic drinks was carried out by MIP sensors and spectrophotometry method. The results obtained by the sensors and the spectrophotometry method were in good agreement. The concentration of preservatives for the potassium sorbate and the sodium benzoate in non-alcoholic drinks was 130 - 176 mg/L and 129 - 146 mg/L, respectively.

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3

Cao, Nhat Linh, Ol'ga Vasil'yevna Duvanova, Aleksandr Nikolayevich Zyablov, and Anh Tien Nguyen. "APPLICATION OF PIEZOSENSORS BASED ON THE MOLECULARLY IMPRINTED POLYIMIDE FOR DETERMI-NATION OF CAFFEINE IN TEA." chemistry of plant raw material, no. 2 (June 10, 2021): 173–80. http://dx.doi.org/10.14258/jcprm.2021028239.

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In this article the molecularly imprinted polymers (MIPs) have been synthesized on the surface of piezosensors. The starting polymer for MIPs production was polyamic acid, which is a copolymer of 1,2,4,5-benzenetetracarboxylic acid and 4,4′-diaminodiphenyl ether. The caffeine served as the template. The quantum-chemical simulation was performed by the Gaussian 09 software using the DFT method at the B3LYP/6-31G(d,p) level with the basis set superposition error (BSSE) at the preliminary stage of the synthesis of the MIP for caffeine. The prepolymerization complexes were calculated to establish intermolecular interactions and obtain the optimum molar ratio between the template and polyamiс acid. It is shown that the constitutional repeating units of polyamic acid interact with the caffeine by forming H-bonds via carboxyl groups. The interaction energy first increases and then decreases with increasing the molar ratio of imprinting. Based on the quantum-chemical calculations, the optimal ratio of the reagents in prepolymerization mixture was set to 1 : 3 with the highest interaction energy (96.7 kJ/mol). Applying thermal imidization of solution of polyamic acid in the presence of a template, the molecularly imprinted polyimide has been synthesized by the non-covalent imprinting method. The ability of the obtained piezosensors to recognize the tempalte in model mixtures was experimentally evaluated. It was found that the range of detectable concentrations of caffeine is 3.1.10-6-10-1 mol/dm3 and the detection limit is 10-6 mol/dm3. Correctness of the caffeine determination in model solutions was verified in the spike/recovery tests. Piezosensors based on MIP were approved for the determination of the caffeine in tea varieties. It is shown that the concentration of caffeine in the aqueous solution increases with increasing brewing time. The relative standard deviation is less than 8%.

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4

Kuchmenko, T. A., E. V. Bodrenko, and E. P. Anokhina. "Express analysis of hard alcohol drinks using the “electronic nose” piezosensors arra." Аналитика и контроль 21, no. 3 (2017): 262–73. http://dx.doi.org/10.15826/analitika.2017.21.3.003.

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5

Korenman, Ya I., E. I. Mel’nikova, S. I. Niftaliev, S. E. Boeva, A. A. Selivanova, E. S. Rudnichenko, and E. V. Bogdanova. "System of piezosensors for prognostication of the storage life of food products." Russian Journal of Applied Chemistry 82, no. 8 (August 2009): 1380–83. http://dx.doi.org/10.1134/s1070427209080114.

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6

Khalzova, S. A., D. A. Krivonosova, A. N. Zyablov та O. V. Duvanova. "Determination of E102, E110, Е122, E124 synthetic dyes in soft drinks by modified piezosensors". Аналитика и контроль 21, № 2 (2017): 85–92. http://dx.doi.org/10.15826/analitika.2017.21.2.006.

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7

Chiu, S. S., H. L. W. Chan, S. W. Or, Y. M. Cheung, and P. C. K. Liu. "Effect of electrode pattern on the outputs of piezosensors for wire bonding process control." Materials Science and Engineering: B 99, no. 1-3 (May 2003): 121–26. http://dx.doi.org/10.1016/s0921-5107(02)00508-1.

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8

Karnaukhov, V. G., V. I. Kozlov, and T. V. Karnaukhova. "Forced vibrations of an anisotropic rectangular plate with piezosensors with account for shear deformations." Reports of the National Academy of Sciences of Ukraine, no. 3 (March 22, 2015): 45–49. http://dx.doi.org/10.15407/dopovidi2015.03.045.

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9

Kuchmenko, T. A., A. A. Shuba, and E. V. Drozdova. "Substantiation of the operating life of gas piezosensors in detection of vapors of organic compounds." Russian Journal of Applied Chemistry 88, no. 12 (December 2015): 1997–2008. http://dx.doi.org/10.1134/s10704272150120150.

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10

Roh, Chang-Gyun, Hyeonmyeong Jeon, and Bongsoo Son. "Do Heavy Vehicles Always Have a Negative Effect on Traffic Flow?" Applied Sciences 11, no. 12 (June 15, 2021): 5520. http://dx.doi.org/10.3390/app11125520.

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Анотація:

The purpose of this study is to analyze the effect of heavy vehicles on traffic flow on a two-lane highway. To achieve this goal, data was obtained from piezosensors on the Seoul–Chuncheon Expressway. Analysis of the data showed that, as everyone knows, the average speed of traffic flows decreases as the proportion of heavy vehicles increases. However, not only the speed decreased, but the speed deviation between vehicles decreased. In other words, it was found that within the traffic group that formed the same platoon, individual vehicles were forced to form similar speeds, resulting in a homogeneous rate. This means that heavy vehicles can be included in the traffic stream, reducing the chances of a vehicle-to-vehicle conflict. This kind of influence can be said to explain that heavy vehicles do not necessarily have a negative effect on traffic flow. In this way, we expect to be able to study ways to manage traffic flow by using the effects of low-speed vehicles.

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11

Kuchmenko, T. A., and Yu A. Asanova. "Use of piezosensors for determining the composition of the equilibrium gas phase of aqueous protein solutions." Russian Journal of Applied Chemistry 82, no. 7 (July 2009): 1188–94. http://dx.doi.org/10.1134/s1070427209070064.

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12

Cao Nhat Linh, O. V. Duvanova, S. Yu Nikitina, and A. N. Zyablov. "The Use of Piezosensors for Determination of Carboxylic Acids in the Intermediate Products of Edible Ethanol Production." Inorganic Materials 56, no. 14 (December 2020): 1379–83. http://dx.doi.org/10.1134/s0020168520140083.

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13

Rusanova, T. Yu, A. V. Kalach, S. S. Rumyantseva, S. N. Shtykov, and I. S. Ryzhkina. "Determination of volatile organic compounds using piezosensors modified with the Langmuir-Blodgett films of calix[4]resorcinarene." Journal of Analytical Chemistry 64, no. 12 (December 2009): 1270–74. http://dx.doi.org/10.1134/s1061934809120120.

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14

Linn, Cao Nhat, Olga V. Duvanova, Svetlana Yu Nikitina, and Alexander N. Zyablov. "THE USE OF PIEZOSENSORS FOR DETERMINATION OF CARBOXYLIC ACIDS IN THE INTERMEDIATE PRODUCTS OF EDIBLE ETHANOL PRODUCTION." Industrial laboratory. Diagnostics of materials 85, no. 4 (May 15, 2019): 11–16. http://dx.doi.org/10.26896/1028-6861-2019-85-4-11-16.

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Анотація:

The reference polymers and polymers with molecular imprints of carboxylic acids (MIPs-CA) — propionic (MlP-Propionic) and butyric (MIP-Butyric) acids — were synthesized on the surface of piezoelectric sensors using aromatic compounds by the non-covalent imprinting method. Molecularly imprinted polymer (MIP) is a polymer produced through molecular imprinting, which leaves cavities in the polymer matrix with affinity to a chosen "template" target molecule. The values of the imprinting factor and selectivity coefficients were calculated to assess the ability of MIPs-CA to recognize the target molecules. It is shown that the sensors modified by the molecularly imprinted polymers exhibit high selectivity for the acid that was a template during their synthesis. The detection limits for propionic and buty ric acids are 7.40 x 10~6 and 8.81 x 10-6 g/dm3, respectively. Correctness of the carboxylic acid determination in model solutions was verified in the spike/recovery tests. The relative standard deviation is less than 10%. The modified piezoelectric sensors were tested in analysis of the intermediate products of edible ethanol production (distillate of fermentation mixture, epyurat, bottom liquids of columns). The correctness of the determination of carboxylic acids in liquids was evaluated using an Agilent Technological 7890B GC Systems. The difference in the results of acid determination between both methods (piezoelectric sensor and chromatography-mass spectrometry) does not exceed 6%. The modified piezosensors expand the potential of rapid determination of carboxylic acids in the intermediate products of ethyl alcohol production.

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15

Balamurugan, V., and S. Narayanan. "A piezolaminated composite degenerated shell finite element for active control of structures with distributed piezosensors and actuators." Smart Materials and Structures 17, no. 3 (May 9, 2008): 035031. http://dx.doi.org/10.1088/0964-1726/17/3/035031.

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16

de Marchi, Luca, Nicola Testoni, Alessandro Perelli, and Alessandro Marzani. "Extension of Lamb Waves Defect Location Techniques to the Case of Low Power Excitation by Compressing Chirped Interrogating Pulses." Key Engineering Materials 569-570 (July 2013): 940–47. http://dx.doi.org/10.4028/www.scientific.net/kem.569-570.940.

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In this work a signal processing algorithm for Lamb waves based defect detection/localization procedures is proposed. In particular, the proposed signal processing allows active-passive networks of piezosensors to use chirp shaped pulses in actuation, instead of classically applied spiky pulses. Thus, defect detection/localization can be achieved by using low power voltages in actuation. Basically, the proposed processing is capable to compensate the acquired time-waveforms from the dispersion due to the traveled distance as well as to compress the additional pulse spreading due to the chirp actuation. A processed time-waveform is thus directly transformed into a distance of propagation. Next, the compensated and compressed signals are exploited to feed an imaging algorithm aimed at providing the position of the defect on the plate. As a result, an automatic detection procedure to locate defect-induced reflections is demonstrated and successfully tested by analyzing experimental Lamb waves propagating in an aluminum plate. The proposed method is suitable for defect detection and can be easily implemented in real applications for structural health monitoring.

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17

De Marchi, Luca, Alessandro Ceruti, Alessandro Marzani, and Alfredo Liverani. "Augmented Reality to Support On-Field Post-Impact Maintenance Operations on Thin Structures." Journal of Sensors 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/619570.

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This paper proposes an augmented reality (AR) strategy in which a Lamb waves based impact detection methodology dynamically interacts with a head portable visualization device allowing the inspector to see the estimated impact position (with its uncertainty) and impact energy directly on the plate-like structure. The impact detection methodology uses a network of piezosensors bonded on the structure to be monitored and a signal processing algorithm (the Warped Frequency Transform) able to compensate for dispersion the acquired waveforms. The compensated waveforms yield to a robust estimation of Lamb waves difference in distance of propagation (DDOP), used to feed hyperbolic algorithms for impact location determination, and allow an estimation of the uncertainty of the impact positioning as well as of the impact energy. The outputs of the impact methodology are passed to a visualization technology that yielding their representation in Augmented Reality (AR) is meant to support the inspector during the on-field inspection/diagnosis as well as the maintenance operations. The inspector, in fact, can see interactively in real time the impact data directly on the surface of the structure. To validate the proposed approach, tests on an aluminum plate are presented. Results confirm the feasibility of the method and its exploitability in maintenance practice.

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18

Du, Lei, Qiao Sun, Changqing Cai, Yue Zhang, and Hongbo Hu. "Antenna Beamwidths of Above-The-Road Radar for Traffic Speed Enforcement in China." International Journal of Antennas and Propagation 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/492326.

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Above-The-Road (AbTR) radar is a new type of speed measurement device used in China for traffic speed enforcement. The antenna beamwidths in vertical and horizontal directions are critical parameters for AbTR radar because speed measurement accuracy partly depends on vertical beamwidth and speed measurement interference from adjacent lanes can be effectively minimized by appropriate choice of horizontal beamwidth. In this paper, the speed measurement principle of AbTR radar is introduced and the reason for field speed measurement error is presented. The speed measurement error is theoretically calculated in various combinations of different vertical beamwidths and possible installation angles. The requirement for horizontal beamwidth to operate with less interference from adjacent lanes is also theoretically laid down with different installation heights and angles. Field tests with three equal-distanced piezosensors each lane as triggering references have been performed on an AbTR radar sample with vertical beamwidth 5.1° and horizontal beamwidth 5.2°. The results of theoretical analysis and field tests validate that the requirement of less than 6° for AbTR radar antenna beamwidths in vertical and horizontal directions is a precondition for accurate and reliable field measurements, which has been added to the China’s pattern approval regulation for AbTR radar devices newly published.

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19

Kuchmenko, T. A., A. A. Shuba, D. A. Menzhulina, A. A. Volkova, V. A. Vecherkin, and J. V. Cornejo Tueros. "On a Correlation between the Results of In-Hospital Analysis of Biosamples from Children Performed Using Standard Methods and an Array of Piezosensors." Journal of Analytical Chemistry 77, no. 3 (March 2022): 376–87. http://dx.doi.org/10.1134/s1061934822010087.

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20

Karnaukhov, V. G., V. I. Kozlov, and T. V. Karnaukhova. "Forced resonant vibrations and the vibroheating of a hinged viscoelastic plate with piezosensors with regard for a geometrical nonlinearity and transverse shear strains." Reports of the National Academy of Sciences of Ukraine, no. 11 (November 17, 2017): 37–43. http://dx.doi.org/10.15407/dopovidi2017.11.037.

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21

Linh, Cao Nhat, Alexander N. Zyablov, Olga V. Duvanova, and Vladimir F. Selemenev. "SORPTION OF CARBOXYLIC ACIDS BY MOLECULARLY IMPRINTED POLYMERS." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 63, no. 2 (February 8, 2020): 71–76. http://dx.doi.org/10.6060/ivkkt.20206302.6071.

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Molecularly imprinted polymers were synthesized as selective coatings of piezoelectric sensors for determination of carboxylic acids in the intermediate fractions of rectified ethanol. Molecularly imprinted polymers were obtained by reorganizing and imidizing polyamic acid chains in N,N-dimethylformamide in the presence of a template by the non-covalent imprinting method. The ability of molecularly imprinted polymers to recognize the target templates was evaluated by studying their sorption properties in comparison with non-imprinted polymers using direct conductometry in static mode. The equilibrium time of polyimide and molecularly imprinted polymers for acetic, propionic, butyric acids is in the range of 40 - 80 min. The type of sorption isotherm of acetic acid is characteristic of polymeric materials with micropores. During the sorption of acetic acid at low concentrations, the solvent-ethanol strongly competes with the adsorbed substance due to the close molecular sizes and the presence of group -OH. The type of sorption isotherms of propionic and butyric acids refers to the monomolecular adsorption. The sorption of carboxylic acids by molecularly imprinted polyimide is carried out mainly due to the formation of hydrogen bonds between carboxyl groups of adsorbent and adsorbate. According to the sorption data, the degrees of extraction, distribution coefficients, and imprinting factor values were calculated (IF = 3.0-15.1). It is shown that the molecularly imprinted polymers for carboxylic acids have better sorption ability to acid molecules than their non-imprinted polymers. At the same time, the molecularly imprinted polymer for butyric acid has the highest sorption capacity. Thus, the possibility of using molecularly imprinted polymers for carboxylic acids based on polyimide as selective coatings of piezosensors has been established.

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22

Gischig, Valentin Samuel, Joseph Doetsch, Hansruedi Maurer, Hannes Krietsch, Florian Amann, Keith Frederick Evans, Morteza Nejati, et al. "On the link between stress field and small-scale hydraulic fracture growth in anisotropic rock derived from microseismicity." Solid Earth 9, no. 1 (January 25, 2018): 39–61. http://dx.doi.org/10.5194/se-9-39-2018.

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Abstract. To characterize the stress field at the Grimsel Test Site (GTS) underground rock laboratory, a series of hydrofracturing and overcoring tests were performed. Hydrofracturing was accompanied by seismic monitoring using a network of highly sensitive piezosensors and accelerometers that were able to record small seismic events associated with metre-sized fractures. Due to potential discrepancies between the hydrofracture orientation and stress field estimates from overcoring, it was essential to obtain high-precision hypocentre locations that reliably illuminate fracture growth. Absolute locations were improved using a transverse isotropic P-wave velocity model and by applying joint hypocentre determination that allowed for the computation of station corrections. We further exploited the high degree of waveform similarity of events by applying cluster analysis and relative relocation. Resulting clouds of absolute and relative located seismicity showed a consistent east–west strike and 70° dip for all hydrofractures. The fracture growth direction from microseismicity is consistent with the principal stress orientations from the overcoring stress tests, provided that an anisotropic elastic model for the rock mass is used in the data inversions. The σ1 stress is significantly larger than the other two principal stresses and has a reasonably well-defined orientation that is subparallel to the fracture plane; σ2 and σ3 are almost equal in magnitude and thus lie on a circle defined by the standard errors of the solutions. The poles of the microseismicity planes also lie on this circle towards the north. Analysis of P-wave polarizations suggested double-couple focal mechanisms with both thrust and normal faulting mechanisms present, whereas strike-slip and thrust mechanisms would be expected from the overcoring-derived stress solution. The reasons for these discrepancies can be explained by pressure leak-off, but possibly may also involve stress field rotation around the propagating hydrofracture. Our study demonstrates that microseismicity monitoring along with high-resolution event locations provides valuable information for interpreting stress characterization measurements.

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23

Kuchmenko, T. A., and J. N. Bosikova. "Application of artificial smell systems for bakery products state monitoring." Proceedings of the Voronezh State University of Engineering Technologies 81, no. 3 (December 20, 2019): 125–31. http://dx.doi.org/10.20914/2310-1202-2019-3-125-131.

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Examples of the integrated analytical system "electronic nose" use to discover early signs of bakery products deterioration are studied in the article. The development of physical and chemical analysis methods goes along the path of samples composition differentiating and making decisions on the components set content that determine the product safety and quality. However, the differentiation and descriptor assessment of the integral organoleptic properties, especially of smell and taste, does not reflect the product true state. The development of innovative methods is based on the approximation of instrumental analysis of smell and taste to human perception. The results of quality assessment and changes in the state of white and black bread during storage by the signals of an array of chemical sensors based on highly sensitive piezoelectric scales are presented. Piezoelectric quartz microscales are modified with nanostructured phases of various nature and mass. Modifiers were selected taking into account their selectivity and sensitivity to easily volatile biomolecules, the content of which can be changed with the maturation or spoilage of bread, or during storage. As such phases, biohydroxyapatite, multilayer carbon nanotubes oxidized with nitric acid, zirconium nitrate are used. It was shown that the MAG-8 electronic nose signals based on eight piezosensors with nanostructured phases it is possible to detect changes in the state of bread by the qualitative and quantitative composition of the mixture of volatile biomolecules that the array is tuned to. For samples of a loaf of wheat flour and black bread, the composition of marker substances was determined, reflecting the nature of the products and their change during storage and spoilage. Changes in the content of water, acetic acid, ketones, alcohols, acetates and amines were noted in the article. The calculated parameters of the "electronic nose" associated with the content of these compounds and allowing them to be recognized in a mixture in the presence of other compounds were offered in the work.

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24

Pan’kov, A. A. "Indicator polymer coating with built-in fiber optic piezosensor." IOP Conference Series: Materials Science and Engineering 1029 (January 19, 2021): 012072. http://dx.doi.org/10.1088/1757-899x/1029/1/012072.

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25

De Boe, Pascal, and Jean-Claude Golinval. "Principal Component Analysis of a Piezosensor Array for Damage Localization." Structural Health Monitoring: An International Journal 2, no. 2 (June 2003): 137–44. http://dx.doi.org/10.1177/1475921703002002005.

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26

Yanchich, V. V. "RESEARCH OF ELECTROMECHANICAL TRANSDUCER’S FASTENING INFLUENCE TO THE ACCELERATION PIEZOSENSOR’S CHARACTERISTICS." IZVESTIYA SFedU. ENGINEERING SCIENCES, no. 2 (July 1, 2021): 130–40. http://dx.doi.org/10.18522/2311-3103-2021-2-130-140.

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27

Kuchmenko, T. A., R. U. Umarkhanov, Zh Yu Kochetova, and N. V. Bel’skikh. "Development of a piezosensor-based transducer, gas analyzer, and ammonia detector." Journal of Analytical Chemistry 67, no. 11 (September 18, 2012): 930–37. http://dx.doi.org/10.1134/s106193481211007x.

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28

Kotchetova, Zh Yu, T. A. Kuchmenko, and O. V. Bazarsky. "Rapid assessment of soil pollution with kerosene using a carbon-nanotube-based piezosensor." Moscow University Chemistry Bulletin 72, no. 1 (January 2017): 63–68. http://dx.doi.org/10.3103/s0027131417010084.

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29

Langlois, E. D., G. A. Shaw, J. A. Kramar, J. R. Pratt, and D. C. Hurley. "Spring constant calibration of atomic force microscopy cantilevers with a piezosensor transfer standard." Review of Scientific Instruments 78, no. 9 (September 2007): 093705. http://dx.doi.org/10.1063/1.2785413.

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30

Zyablov, A. N., A. V. Kalach, Yu A. Zhibrova, V. F. Selemenev, and O. V. D’yakonova. "Determination of glycine in aqueous solutions using a molecularly imprinted polymer-modified piezosensor." Journal of Analytical Chemistry 65, no. 1 (January 2010): 91–93. http://dx.doi.org/10.1134/s106193481001017x.

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Pan’kov, A. A. "Diagnostics of gradient strains field in polymer composite material with built-in fiber optic piezosensor." IOP Conference Series: Materials Science and Engineering 1029 (January 19, 2021): 012063. http://dx.doi.org/10.1088/1757-899x/1029/1/012063.

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Ali, Reem Sami, Sahar Abdul Aziz Mohammed, and Asmaa Hadi Mohammed. "Synthesis of ZnO and CdO thin film on PSi substrate using ElectroChemical Methodology for piezosensor." IOP Conference Series: Materials Science and Engineering 928 (November 19, 2020): 072154. http://dx.doi.org/10.1088/1757-899x/928/7/072154.

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Kuchmenko, T. A., R. P. Lisitskaya, and V. S. Shabel’skii. "Using a Piezosensor-Based “Electronic Nose” for Establishing the Adulteration of Gasoline with Different Octane Numbers." Journal of Analytical Chemistry 77, no. 2 (February 2022): 206–15. http://dx.doi.org/10.1134/s106193482202006x.

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Raza, Shoaib, MD Jabir, Abhishek Kumar, Adnan ., and Goutam Roy. "Study of the Effects of a Crack in Statically Loaded Structural Elements with the Aid of Piezosensor." Reason-A Technical Journal 18 (July 1, 2019): 9. http://dx.doi.org/10.21843/reas/2019/9-15/196161.

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Kochetova, Zh Yu, Т. А. Kuchmenko, A. F. Sidorkin, and A. A. Kravchenko. "PIEZOSENSORY DETECTION OF CARBONIC ACIDS IN THE GAS MOTOR OIL PHASE FOR EXPRESS EVALUATION OF THE DEGREE OF ITS PROCESSING." Scientific and Technical Volga region Bulletin 7, no. 6 (December 2017): 64–67. http://dx.doi.org/10.24153/2079-5920-2017-7-6-64-67.

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Dragan, Krzysztof, Michal Dziendzikowski, Tadeusz Uhl, and Tadeusz Stepinski. "Remote Monitoring of Fatigue Cracks Growth in the Aircraft Structure Based on Active Piezosensor Network during the Full Scale Fatigue Test." Key Engineering Materials 588 (October 2013): 249–56. http://dx.doi.org/10.4028/www.scientific.net/kem.588.249.

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One of the major issues from a structural integrity point of view of the aircraft structure is an appropriate health monitoring technology delivery for the damage tolerant philosophy. This paper presents a development of a system for fatigue crack growth monitoring and early damage detection in the PZL 130 ORLIK TC II turbo-prop military trainer aft structure. The maintenance system of the aircraft shifts from the safe-life to the hard-time. The aircraft started Full Scale Fatigue Test (FSFT) which will continue up to 2013. In the article a built block approach for the system design, signal modeling, sensing and signal processing as well as damage detection is presented. Taking into the consideration a previous experience of AGH as well as AFIT, a network of PZT transducers was deployed in the aircraft structure hot-spots. The system components are: remote monitoring unit, signal analysis, graphical user interface, sensor self-diagnostic tools, and data classification model. Description of damage detection capabilities are delivered in the paper. In particular some issues concerning the proposed damage indices and its application to crack growth estimation models are discussed. Fishers Linear Discriminant is used as a method to obtain effective crack growth predictors and one of the self-diagnostic tools used in the system. The results of the data collected from specimen fatigue tests are delivered and cross-validation technique is used to evaluate a classification model based on the damage indices derived.

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Linh, Cao Nhat, О. V. Duvanova, and A. N. Zyablov. "Application of a molecularly imprinted polymer based on the polyimide as a piezosensor selective coating for determining the oleic acid in oils." Аналитика и контроль 23, no. 1 (2019): 120–27. http://dx.doi.org/10.15826/analitika.2019.23.1.006.

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Georgi, Patrick, Ssrah Eschelbacher, Thomas Stehle, and Hans-Christian Möhring. "Erfahrungen mit alternativen Kraftmessungen/Experiences with alternative force measurements - Comparing sensor-integrated toolholders to traditional piezo-based measurement technology." wt Werkstattstechnik online 110, no. 01-02 (2020): 24–31. http://dx.doi.org/10.37544/1436-4980-2020-01-02-26.

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Анотація:

Die Prozessüberwachung spielt in der Zerspanung eine immer wichtiger werdende Rolle. So können zum Beispiel mittels Zerspankraftmessungen ökonomisch optimierte Parameter in Zerspanprozessen gefunden werden, die zu einer Verbesserung der Auslastung von Werkzeug und Maschine führen. Des Weiteren kann über die Zerspankraft auf den aktuellen Verschleißzustand der Werkzeuge im Prozess sowie auf die jeweils erreichbare Bearbeitungsgenauigkeit zurückgeschlossen werden. Für Zerspankraftmessungen gibt es eine Vielzahl an zur Verfügung stehenden Kraftmesssystemen; zum einen traditionelle Messtechnik auf Basis von Piezosensoren zur Kraftmessung und zum anderen Kraftmesstechnik auf der Basis von Dehnmessstreifen (DMS). Dieser Beitrag untersucht die Kraftaufnahme bei Fräs- und Bohrprozessen, bei denen beide Kraftmesssysteme simultan eingesetzt wurden.   Process monitoring plays an increasingly important role in machining. For example, through cutting force measurements, it is possible to find economically optimal parameters in the milling process, which lead to an improvement in the utilization of the tool and the machine. Furthermore, the cutting force can be used to deduce the state of wear of the tools in the process. There are varieties of available force measuring systems for this purpose; on the one hand, traditional measuring technology based on piezo sensors for force measurement and the other force measuring technology based on strain gauges (strain gauges). This article examines the force absorption in milling and drilling processes where both force-measuring systems were used simultaneously.

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Merenkova, A. A., K. V. Zhuzhukin, A. N. Zyablov, and L. I. Belchinskaya. "Determination of formaldehyde in production solutions using the piezoelectric sensors." Аналитика и контроль 25, no. 2 (2021): 140–45. http://dx.doi.org/10.15826/analitika.2021.25.2.003.

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In the current work, piezoelectric sensors based on a molecular imprinted polymer (MIP) were obtained for determining the formaldehyde in the industrial solutions of a woodworking plant. The synthesis was carried out directly on the surface of the piezoelectric sensor. In the process of the two-stage thermoimidization of the obtained prepolymerization mixture, a molecular imprinted polyimide of formaldehyde was formed. For the analysis of the supra-resin part of the effluent of the Grafskaya kuhnya LLC (Voronezh) woodworking enterprise, which was obtained by the dry distillation of wood, the method of a calibration graph having a linear relationship was used; the coefficient of determination R2 = 0.97. The detection limit of the piezosensor was 0.6 ∙ 10–4 mol / dm3, the range of determined concentrations was 1.0 – 10–4 mol / dm3. The comparison of piezoelectric sensors based on the polymer without imprints and based on the polymer with imprints of formaldehyde showed high selectivity of the latter for the target molecule. The calculated imprinting factor was 28.3, the coefficient of selectivity with respect to phenol was 0.05, which indicated the selectivity of the modified sensor to formaldehyde. The verification of the correctness of the determination of formaldehyde in the model and production solutions was carried out using the "added-found" method. It was found that the MIP-based sensor was sensitive only to formaldehyde, the relative standard deviation did not exceed 2.0%. In order to assess the effect of the object matrix (formaldehyde) on the value of the resonant frequency, the standard addition method was used. It was determined that the matrix did not affect the value of the analytical signal, the relative standard deviation was 2.8%. For the re-analysis, the piezoelectric sensor was exposed to the regeneration in the oven at 50 ⁰С. The proposed method for determining the concentration of the formaldehyde using the MIP-sensor allowed controlling the content of the toxicant in the industrial solutions.

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"DETERMINATION OF POTASSIUM SORBATE AND SODIUM BENZOATE IN NON-ALCOHOLIC DRINKS WITH PIEZOSENSORS BASED ON MOLECULAR-IMPRINTED POLYMERS." ChemChemTech 65, no. 10 (2022): 14–20. http://dx.doi.org/10.6060/ivkkt.20226510.6584.

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Preservatives such as potassium sorbate and sodium benzoate are commonly used in the food industry. It is necessary to control the content of preservatives in food products, because exceeding the permissible limit of the concentration can affect human health. To determine the contents of potassium sorbate and sodium benzoate in non-alcoholic drinks, a piezoelectric sensor based on molecularly imprinted polymers (MIPs) was used. Molecularly imprinted polymers were synthesized by copolymer of dianhydride 1,2,4,5-benzenetetracarboxylic acid with 4,4'-diaminodiphenyl oxide in N,N-dimethylformamide in the presence of a template by the non-covalent imprinting method. To assess the selectivity and ability to recognize target molecules, the values of the imprinting factor and the selectivity coefficient of the sensors were calculated. Based on the data obtained, it was found that molecularly imprinted polymers with imprints of potassium sorbate and sodium benzoate had better selectivity and ability to recognize target potassium sorbate and sodium benzoate molecules than polymers without imprints. In this study, the ranges of determined concentrations (5-500 mg/l) and detection limits of potassium sorbate (1.6 mg/l) and sodium benzoate (2 mg/l) were experimentally established. The results of the determination of potassium sorbate and sodium benzoate in non-alcoholic drinks by piezosensors were compared with the spectrophotometric method. It had been established that the difference in the determination results did not exceed 10%. Thus, the possibility of using piezosensor based on molecularly imprinted polymers with imprints of potassium sorbate and sodium benzoate for their determination in non-alcoholic drinks has been established.

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Marzo, Gaia, Vincenzo M. Mastronardi, Luciana Algieri, Federica Vergari, Filippo Pisano, Luca Fachechi, Sergio Marras, et al. "Sustainable, Flexible, and Biocompatible Enhanced Piezoelectric Chitosan Thin Film for Compliant Piezosensors for Human Health." Advanced Electronic Materials, March 11, 2022, 2200069. http://dx.doi.org/10.1002/aelm.202200069.

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Kundu, Kusumita, Arnab Ghosh, Shewli Pratihar, Shiv Govind Singh, Tarun Kumar Kayal, and Rajat Banerjee. "Boron doped SiC thin film on Silicon synthesized from polycarbosilane: a new lead free material for applications in piezosensors." Journal of Materials Science: Materials in Electronics, September 13, 2021. http://dx.doi.org/10.1007/s10854-021-06966-4.

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de Marzo, Gaia, Vincenzo M. Mastronardi, Luciana Algieri, Federica Vergari, Filippo Pisano, Luca Fachechi, Sergio Marras, et al. "Sustainable, Flexible, and Biocompatible Enhanced Piezoelectric Chitosan Thin Film for Compliant Piezosensors for Human Health (Adv. Electron. Mater. 9/2023)." Advanced Electronic Materials 9, no. 9 (September 2023). http://dx.doi.org/10.1002/aelm.202370041.

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Quinsaat, Jose Enrico Q., Iurii Burda, Ronny Krämer, Daniel Häfliger, Frank A. Nüesch, Mihaela Dascalu, and Dorina M. Opris. "Conductive silicone elastomers electrodes processable by screen printing." Scientific Reports 9, no. 1 (September 16, 2019). http://dx.doi.org/10.1038/s41598-019-49939-8.

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Abstract Conductive inks consisting of graphene and carbon black conductive fillers into a polydimethylsiloxane (PDMS) matrix, which can be processed into thin films by screen printing are developed. The influence of filler composition and content on mechanical and electrical properties of the conductive composites is investigated. The best composites were evaluated as electrode material for dielectric elastomer actuators and for piezoelectric sensors. With increasing filler content, the electrical properties of the resulting composites of graphite nanoplates (GNPs) or a binary mixture of GNPs and carbon black (CB) with PDMS (Mw = 139 kg/mol) are enhanced. Hence, PDMS composites filled with GNPs (42 wt.%) or a binary mixture of GNPs/CB (300/150 ratio, 30 wt.% of total filler loading) exhibited constant contact resistance values of 0.5 and 5 Ω determined in life-cycle test, respectively, thus rendering them suitable as electrode materials for piezosensors. On the other hand, dielectric elastomer actuators require more flexible electrode materials, which could be tuned by varying the polymer molecular weight and by reducing the filler content. Therefore, a composite consisting of PDMS (Mw = 692 kg/mol) and a binary filler mixture of GNPs/CB (150/75 ratio, 18 wt.% of total filler loading) was used for producing the electrodes of dielectric elastomer transducers (DETs). The produced DETs with different electrode thicknesses were characterized in terms of their performance. The negligible hysteresis of the electrode materials is favorable for sensor and actuator applications.

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