scholarly journals Methods of Assessing Degradation of Supercapacitors by Using Various Measurement Techniques

2019 ◽  
Vol 9 (11) ◽  
pp. 2311 ◽  
Author(s):  
Stanislaw Galla ◽  
Arkadiusz Szewczyk ◽  
Janusz Smulko ◽  
Patryk Przygocki
Keyword(s):  
Measurement Method ◽  
Measurement Techniques ◽  
Qualitative Evaluation ◽  
Measurement Methods ◽  
Qualitative Assessment ◽  
Non Invasive ◽  
Measurement Results ◽  
Qualitative Analyses ◽  
Invasive Measurement

This article presents the qualitative analyses of the construction of supercapacitor samples. The analyses are based on the suggested thermographic measurements as well as the technique of testing the inherent noise of the investigated element. The indicated assessment methods have been referred to the currently used parameters for the qualitative evaluation of supercapacitors. The approach described in this paper, which introduces additional parameters assessing worn out of supercapacitors, can be included in the so-called non-invasive measurement methods, which allow the assessment of the condition of the sample under test. This article presents the applied measurement stands and verifies of the applicability of measurement methods in relation to the currently used parameters allowing for the qualitative assessment of supercapacitors. The measurement method presented in this article was used to study prototypes of supercapacitors. The measurement results allow for more accurate characterization of the observed element. Conducted tests revealed, at the same time, that one of the proposed evaluation methods, based on measurements of inherent noise of tested supercapacitors, is a method predicting their degradation.

A non-invasive measurement method of pipeline flow rate based on dual FBG sensors

2022 ◽  
pp. 1-1
Author(s):  
Cong Li ◽  
Cong Li ◽  
Ming-Yao Liu ◽  
Han Song ◽  
Xue-Li Yang ◽  
...  
Keyword(s):  
Flow Rate ◽  
Measurement Method ◽  
Non Invasive ◽  
Pipeline Flow ◽  
Fbg Sensors ◽  
Invasive Measurement

Investigation of Concrete Slabs under Impact Load

2011 ◽  
Vol 82 ◽  
pp. 398-403 ◽  
Author(s):  
Anja Hummeltenberg ◽  
Birgit Beckmann ◽  
Tony Weber ◽  
Manfred Curbach
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Impact Load ◽  
Compressive Strain ◽  
Measurement Techniques ◽  
Qualitative Evaluation ◽  
Concrete Slabs ◽  
Vehicle Impact ◽  
Measurement Results ◽  
Extent Of Damage

The behaviour of concrete slabs under dynamic load such as rock fall or vehicle impact isinvestigated in this work. The aim of this study is to enlarge the knowledge concerning thesubsequent reinforcing of concrete slabs and its inuence on their behaviour under impact load.Therefore, the results of the drop tower experiments with standard concrete, high performanceconcrete (HPC) and ultra-high performance concrete (UHPC) are compared and interpreted.The analysis of the test results focuses on the qualitative evaluation of the protective e ectand on the quantitative evaluation of measurement results. Regarding the protective e ect, theinuence of the additional steel stirrup reinforcement is rather small. In contrast, the subsequentfabric reinforcement prevents the perforation of the concrete slabs. The behaviour of steel fabricand carbon fabric is compared. Although particular di erences in fracture behaviour are seen,both types of fabric reinforcement obviate total punch-through and, hence, vastly enhance theprotective performance. Comparing the stamping cones and analysing the extent of damage, theprotective capacity of di erent concrete slabs is evaluated. Within the quantitative evaluationof the measurement results, the evolution of strains and strain rates is being considered. Onthe top side of the concrete slabs, the strain is measured as tensile strain in the rst spellafter load application, turning into compressive strain later on. The evolution of strains andstrain rates indicates wave propagation. Beside the strain results, special attention is paid tothe correlation of di erent measurement techniques. The results of strain gauges, accelerometer,load cells and photogrammetry are contextualised and therefore show the change from the localmaterial behaviour to the global structure response in temporal sequence.

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