Proceedings—Machinery Vibration Monitoring Analysis Meeting

Eshleman, R. L.; Saunders, H.

doi:10.1115/1.3269164

Cited by 3 publications

(4 citation statements)

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“…Based on the thickness of the paper used as the substrate, the kraft paper was twice as thick, suggesting that the vibration characteristics of the speaker varied accordingly. 47 …”

Section: Resultsmentioning

confidence: 99%

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Vertically and Horizontally Drawing Formation of Graphite Pencil Electrodes on Paper by Frictional Sliding for a Disposable and Foldable Electronic Device

et al. 2020

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The objective of this study is to fabricate an electrode by frictional sliding caused by a rough paper surface. The pressure exerted during drawing induces adsorption of the graphite particles by the rough paper and simultaneously reduces the surface roughness of the paper electrode. Repetitive drawing in one-way direction reduced the roughness of the paper surface, decreasing the grain boundaries of graphite. This increases the electron pathway at the electrode, thus reducing the resistance to less than 50 Ω. At the same time, repetitive drawing could confirm that unstable errors caused by the hand could help converge within a certain margin of error. We quantified the relationship between pressure and resistance when drawing on the electrode using a pencil hardness tester. In addition, the electrodes formed by repeated drawing generated a new surface grain and boundary, parallel to the drawing direction, and changed the electrode characteristics with respect to the drawing direction. The grain boundary difference based on the drawing direction was measured via a heating test of the foldable device, a sound pressure level, and laser scattering vibrometer measurements of a linear speaker. The fabricated graphite electrodes can be used in disposable foldable paper electronics because they are prepared using inexpensive materials.

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“…Based on the thickness of the paper used as the substrate, the kraft paper was twice as thick, suggesting that the vibration characteristics of the speaker varied accordingly. 47 …”

Section: Resultsmentioning

confidence: 99%

“…Kraft paper with high conductivity exhibited lower vibration and SPL than the printing paper. Based on the thickness of the paper used as the substrate, the kraft paper was twice as thick, suggesting that the vibration characteristics of the speaker varied accordingly …”

Section: Resultsmentioning

confidence: 99%

Vertically and Horizontally Drawing Formation of Graphite Pencil Electrodes on Paper by Frictional Sliding for a Disposable and Foldable Electronic Device

et al. 2020

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“…AE is defined as transient elastic waves generated from a rapid release of strain energy caused by a deformation or damage within or on the surface of a material [1]. Catlin [2] reported that AE activity from bearing defects was attributed to four main factors including numerous transient and random AE signals associated with bearing defects. During the bearing operation, bursts of AE result from the passage of the defect through the roller and raceway contacts.…”

Section: Introductionmentioning

confidence: 99%

Defects Diagnosis of Bearing by Means of Acoustic Emission and Continuous Wavelet Transform

Hao

Feng

Chu

2009

KEM

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The acoustic emission signals of rolling bearing with different type of defects are de-noised and illustrated by the continuous wavelet transform and scalogram. Morlet wavelet function is selected and the wavelet parameters are optimized based on the principle of minimal wavelet entropy. The soft-threshold de-noising is used to filter the wavelet transform coefficients. The de-noised signals obtained by reconstructing the wavelet coefficients show the obvious impulsive features. Based on the optimized waveform parameters, the wavelet scalogram is used to analyze the real AE signal from the defective rolling bearing in experimental test rig. The results indicate that the proposed method is useful and efficient for signal purification and features extraction.

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“…In this case, the problem is in motor if 1X levels of free side of the engine are high. Otherwise the problem is in the pump [8]. The discussed features of the imbalance measurement are summarized in Table I.…”

Section: R Kiliçmentioning

confidence: 99%

Determination of Imbalance Problem in Electric Motor and Centrifugal Pump by Vibration Analysis

Kılıç¹

2016

Acta Phys. Pol. A

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In this study, general characteristics of imbalance problem in electric motor and centrifugal pumps and the vibrations caused by these faults are discussed. The fact that frequencies would yield vibrations which were caused by imbalance problems was investigated in detail. In addition, the vibration behavior formed by the electric motor and centrifugal pump running in water pumping mode are presented as a sample case. It is observed that the imbalance problem which have occurred in the electric motor and centrifugal pump could be easily determined using the vibration analysis.

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Proceedings—Machinery Vibration Monitoring Analysis Meeting

Cited by 3 publications

References 0 publications

Vertically and Horizontally Drawing Formation of Graphite Pencil Electrodes on Paper by Frictional Sliding for a Disposable and Foldable Electronic Device

Vertically and Horizontally Drawing Formation of Graphite Pencil Electrodes on Paper by Frictional Sliding for a Disposable and Foldable Electronic Device

Defects Diagnosis of Bearing by Means of Acoustic Emission and Continuous Wavelet Transform

Determination of Imbalance Problem in Electric Motor and Centrifugal Pump by Vibration Analysis

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