Development of a measuring system for on-line in situ monitoring of composite materials manufacturing

2016 ◽  
Vol 90 ◽  
pp. 760-770 ◽  
Author(s):  
R. Polanský ◽  
J. Pihera ◽  
J. Komárek ◽  
R. Pavlica ◽  
P. Prosr ◽  
...  
Keyword(s):  
Composite Materials ◽  
In Situ Monitoring ◽  
Measuring System ◽  
On Line

On-line in situ monitoring of the soybean oil and ethanol transesterification reaction by fluorescence spectroscopy

Fuel ◽  
2015 ◽  
Vol 145 ◽  
pp. 109-115 ◽  
Author(s):  
T. Izida ◽  
L. Bussler ◽  
J.R. Silva ◽  
L.H.C. Andrade ◽  
E. Simionatto ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Soybean Oil ◽  
Transesterification Reaction ◽  
In Situ Monitoring ◽  
On Line

scholarly journals A Cost-Effective In Situ Zooplankton Monitoring System Based on Novel Illumination Optimization

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3471
Author(s):  
Zhiqiang Du ◽  
Chunlei Xia ◽  
Longwen Fu ◽  
Nan Zhang ◽  
Bowei Li ◽  
...  
Keyword(s):  
High Resolution ◽  
Imaging System ◽  
Physiological State ◽  
Cost Effective ◽  
In Situ Monitoring ◽  
Measuring System ◽  
Target Area ◽  
Image Processing Algorithm ◽  
Led Array

A cost-effective and low-power-consumption underwater microscopic imaging system was developed to capture high-resolution zooplankton images in real-time. In this work, dark-field imaging was adopted to reduce backscattering and background noise. To produce an accurate illumination, a novel illumination optimization scheme for the light-emitting diode (LED) array was proposed and applied to design a lighting system for the underwater optical imaging of zooplankton. A multiple objective genetic algorithm was utilized to find the best location of the LED array, which resulted in the specific illumination level and most homogeneous irradiance in the target area. The zooplankton imaging system developed with the optimal configuration of LEDs was tested with Daphnia magna under laboratory conditions. The maximal field of view was 16 mm × 13 mm and the optical resolution was 15 μm. The experimental results showed that the imaging system developed could capture high-resolution and high-definition images of Daphnia. Subsequently, Daphnia individuals were accurately segmented and their geometrical characters were measured by using a classical image processing algorithm. This work provides a cost-effective zooplankton measuring system based on an optimization illumination configuration of an LED array, which has a great potential for minimizing the investment and operating costs associated with long-term in situ monitoring of the physiological state and population conditions of zooplankton.

On-line and in situ monitoring of biomass in submerged cultivations

1997 ◽  
Vol 15 (12) ◽  
pp. 517-522 ◽  
Author(s):  
Lisbeth Olsson ◽  
Jens Nielsen
Keyword(s):  
In Situ Monitoring ◽  
On Line

scholarly journals A multi-parameter miniature photometric analyser for fully automated environmental water monitoring

2019 ◽  
Vol 6 (1) ◽  
pp. 34-39
Author(s):  
Daniele Paesani
Keyword(s):  
Sea Water ◽  
Process Analysis ◽  
Wide Spectrum ◽  
Industrial Process ◽  
Environmental Water ◽  
In Situ Monitoring ◽  
On Line ◽  
Analyte Detection ◽  
Increasing Demand

Nowadays, the increasing demand for constant in-situ monitoring of clean water, wastewater and sea water requires the deployment of automated platforms capable of on-line autonomous sampling, extended unattended operation and of multi-analyte detection. The Micro Loop Injection Analyser (μLIA) system hereby presented relies on integrated additively manufactured opto-fluidic components which allow for increased performance solutions to be implemented cost-effectively and in miniaturised footprints, targeting a wide spectrum of applications which ranges from in-situ environmental monitoring and field water testing to industrial process analysis. Preliminary tests of the μLIA unit have shown good reproducibility and stability of the system and a good performance of its self-calibration routines.

Application in Avionics Anomaly Detection Using Multi-Variant Hotelling T2 Statistics

2012 ◽  
Vol 472-475 ◽  
pp. 473-476 ◽  
Author(s):  
Yi Wang ◽  
Ming Qing Xiao ◽  
Sheng Sheng ◽  
Liang Liang Zhao
Keyword(s):  
Anomaly Detection ◽  
Health Management ◽  
Fault Injection ◽  
Test System ◽  
In Situ Monitoring ◽  
Management Problem ◽  
On Line ◽  
Line Test ◽  
System Prototype

This article proposes a framework of in-situ monitoring for anomaly detection of avionics, Uses the multi-variant Hotelling T2 statistics to form a quickly reference to the anomaly behavior. The proposed method can be used to solve the data driven Prognostics and Health Management problem to detect the anomaly behavior of equipment as well as the potential isolation and diagnosis of the symptoms of incoming faults. The article also gives a structure of an on-line test and monitoring system prototype, based on the legacy on-line test system, as well as developed a basic information gathering route and a multi-variant test based anomaly detection method. A fault injection based simulation experiment was formed to validate the performance of the system and method under consideration. The results shows that the proposed method has a solid mathematics fundamental and the advantages as well as good performance, worth to be spread.

Interdigitated Electrode Array Based Sensors for Monitoring of Caesium

2009 ◽  
Author(s):  
Ian D. Nickson ◽  
Colin Boxall ◽  
Simon N. Port
Keyword(s):  
Electrode Array ◽  
In Situ Monitoring ◽  
Polymeric Membrane ◽  
Maximal Response ◽  
Interdigitated Microelectrode ◽  
Selective Membrane ◽  
On Line ◽  
Membrane Components ◽  
Primary Ions

The requirement for on-line and in-situ monitoring of analytes in process and effluent streams and in ground waters has become increasingly more important in recent years. We therefore describe the development of the transduction element for a fully automated online instrument for the detection of caesium. The sensor layer for this instrument employs an Ion Selective Conductimetric microsensor (ISCOM) as the detector. This is based upon a plasticized polymeric membrane incorporating a selective ionophore, overlaying two interdigitated microelectrode arrays. A direct relationship has been observed between the bulk conductance (as determined by the microelectrodes) of the ionophore loaded membrane and the concentration of the primary ions in solution. Caesium selective ISCOMs were prepared using a ion selective membrane containing the commercially available ionophore Calix[6]arene-hexaacetic acid hexaethyl ester, polyvinylchloride (PVC) and plasticiser Nitrophenylether (NPOE). Methods of ion selective membrane deposition have been investigated in order to obtain a maximal response. The relative levels of membrane components have also been varied in order to further enhance the ISCOM reponse. We also present preliminary data concerning the caesium selectivity with respect to a range of possible interferents, including rubidium.

Monitoring biodegradation of diesel fuel in bioventing processes using in situ respiration rate

2006 ◽  
Vol 53 (4-5) ◽  
pp. 263-272 ◽  
Author(s):  
T.H. Lee ◽  
I.G. Byun ◽  
Y.O. Kim ◽  
I.S. Hwang ◽  
T.J. Park
Keyword(s):  
Respiration Rate ◽  
Diesel Fuel ◽  
Contaminated Soil ◽  
Heterotrophic Bacteria ◽  
Soil Column ◽  
Measuring System ◽  
Co2 Production ◽  
Biodegradation Rate ◽  
On Line

An in situ measuring system of respiration rate was applied for monitoring biodegradation of diesel fuel in a bioventing process for bioremediation of diesel contaminated soil. Two laboratory-scale soil columns were packed with 5 kg of soil that was artificially contaminated by diesel fuel as final TPH (total petroleum hydrocarbon) concentration of 8,000 mg/kg soil. Nutrient was added to make a relative concentration of C:N:P = 100:10:1. One soil column was operated with continuous venting mode, and the other one with intermittent (6 h venting/6 h rest) venting mode. On-line O2 and CO2 gas measuring system was applied to measure O2 utilisation and CO2 production during biodegradation of diesel for 5 months. Biodegradation rate of TPH was calculated from respiration rate measured by the on-line gas measuring system. There were no apparent differences between calculated biodegradation rates from two columns with different venting modes. The variation of biodegradation rates corresponded well with trend of the remaining TPH concentrations comparing other biodegradation indicators, such as C17/pristane and C18/phytane ratio, dehydrogenase activity, and the ratio of hydrocarbon utilising bacteria to total heterotrophic bacteria. These results suggested that the on-line measuring system of respiration rate would be applied to monitoring biodegradation rate and to determine the potential applicability of bioventing process for bioremediation of oil contaminated soil.

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