Grundlagenorientierte Untersuchungen einer neuartigen sensortechnischen Verkehrsdatenerfassung für Brücken/Fundamental investigations of a new type of sensor-based traffic data acquisition for bridges

Bauingenieur ◽  
2021 ◽  
Vol 96 (10) ◽  
pp. 338-348
Author(s):  
Matthias Kraus ◽  
Björn Wittor ◽  
Robert Arnold
Keyword(s):  
Data Acquisition ◽  
Traffic Data ◽  
New Type

Ein Großteil der in Deutschland heute genutzten Brücken wurde vor über 40 bis 50 Jahren errichtet. Das Alter und insbesondere die Verkehrsbelastungen, die im Nutzungszeitraum stark zugenommen haben, führen zu verstärkten Kontrollen einzelner Tragwerke. Im Zuge der Brückennachrechnung werden dabei zunehmend Monitoring-Systeme zur Überwachung eingesetzt, wobei der damit verbundene Aufwand groß und der Bedarf einfacher Lösungen entsprechend hoch ist. Hierzu existieren verschiedene Mess-Systeme und Sensoren, welche sich zur Erfassung unterschiedlicher Informationen eignen, wie globale und lokale Bauwerksreaktionen sowie die in Situ auftretenden Belastungen und Umwelteinflüsse. Von besonderer Bedeutung ist die Erfassung der Verkehrslasten, durch die ein Bauwerk beansprucht wird, das heißt die durch Fahrzeuge hervorgerufenen Lasten sowie deren Position beim Überfahren einer Brücke. Auf Grundlage theoretischer Überlegungen und Analysen wurden in der Forschergruppe „Die Digitale Straße“ hierzu Visionen eines neuartigen Monitoringkonzepts auf Basis von MEMS-Sensoren entwickelt und grundlagenorientiert untersucht.

Reduction of adsorbable organically bound halogens (AOX) formation at near-neutral pH chlorine dioxide bleaching of softwood kraft pulp

Holzforschung ◽  
2020 ◽  
Vol 74 (6) ◽  
pp. 597-604
Author(s):  
Sara Starrsjö ◽  
Olena Sevastyanova ◽  
Peter Sandström ◽  
Juha Fiskari ◽  
Maria Boman ◽  
...  
Keyword(s):  
Chlorine Dioxide ◽  
High Selectivity ◽  
Bicarbonate Buffer ◽  
Neutral Ph ◽  
Elemental Chlorine ◽  
Pulp Viscosity ◽  
Softwood Kraft Pulp ◽  
New Type ◽  
Adsorbable Organically Bound Halogens

AbstractRecently, a new type of bleaching sequence, Elemental Chlorine Free (ECF) light with one D stage, has been developed. It combines the efficiency and high selectivity of chlorine dioxide (ClO2) bleaching with more environmental friendly oxygen based bleaching chemicals. This work examines the effect of pH on the formation of adsorbable organically bound halogens (AOX) in an intermediate D stage – a single ClO2 stage at the middle of an ECF light bleaching sequence. Carbon dioxide (CO2) is used to generate a bicarbonate buffer in situ, stabilizing the pH during the bleaching. Near-neutral pH is hypothesized to decrease the formation of strongly chlorinating species, so that the AOX formation is reduced. The results indicate that a near-neutral pH D stage can reduce the AOX content in the effluents with up to 30%. The ISO brightness was unchanged to a lower ClO2 consumption. The pulp viscosity was slightly higher after near-neutral pH D stage, but to its disadvantage a lesser delignification and removal of HexA was obtained. The degradation of HexA correlated well with the AOX, affirming earlier theories that HexA has a major impact on the AOX formation. The higher amounts of residual HexA and lignin resulted in more thermal yellowing of the pulps bleached with a near-neutral pH D stage.

In situ isotopic analysis of uranium using a new data acquisition protocol for 1013 ohm Faraday amplifiers

2021 ◽  
Author(s):  
Kota Yamamoto ◽  
Hisashi Asanuma ◽  
Hiroaki Takahashi ◽  
Takafumi Hirata
Keyword(s):  
Data Acquisition ◽  
Data Reduction ◽  
Reduction Method ◽  
Isotopic Analysis ◽  
High Gain ◽  
Transient Signals ◽  
Acquisition Protocol ◽  
Data Reduction Method ◽  
Isotopic Measurements

New data reduction method for isotopic measurements using high-gain Faraday amplifiers enables precise uranium isotopic analysis even from transient signals.

Boosting the Capabilities of Gas Stand Data Acquisition and Control Systems by Using a Digital Twin Based on a Holistic Turbocharger Model

2021 ◽  
Author(s):  
José R. Serrano ◽  
Luis Miguel García-Cuevas ◽  
Vishnu Samala ◽  
Juan Antonio López-Carrillo ◽  
Holger Mai
Keyword(s):  
Data Acquisition ◽  
Control Systems ◽  
Heat Fluxes ◽  
Testing Time ◽  
Time Saving ◽  
Digital Twin ◽  
Dimensional Modeling ◽  
On Line ◽  
And Control

Abstract During the last decade, increasingly advanced turbocharger models have been developed for sizing, engine matching and one-dimensional modeling. This work goes further and, instead of using these models for turbocharged engines design or analysis, it implements them in the data acquisition and control system of a turbocharger gas stand. This way, interesting new capabilities arise. The paper shows that there are important synergies between advanced turbocharger gas stand data acquisition and control systems and the modern turbocharger holistic models that have not been deeply exploited until now. They can be summarized as: on-line heat fluxes analysis, in-situ outlier testing points detection, testing time saving and using digital-twin techniques to monitor turbocharger health during testing.

A Ni3N–Co3N hybrid nanowire array electrode for high-performance nonenzymatic glucose detection

2018 ◽  
Vol 10 (15) ◽  
pp. 1680-1684 ◽  
Author(s):  
Xinglu Dai ◽  
Wenqing Deng ◽  
Chao You ◽  
Zhen Shen ◽  
Xiaoli Xiong ◽  
...  
Keyword(s):  
High Performance ◽  
Active Catalyst ◽  
Nanowire Array ◽  
Alkaline Media ◽  
Nickel Cobalt ◽  
Array Electrode ◽  
New Type ◽  
Glucose Electrooxidation ◽  
Catalyst Electrode

In this communication, we report a new type of nickel cobalt nitride hybrid nanowire array in situ grown on a Ti plate (Ni3N–Co3N NW/Ti) topotactically converted from Ni–Co hydroxide as a high-active catalyst electrode for glucose electrooxidation in alkaline media.

Wireless Data Acquisition System Based on ZigBee and FPGA Technology

2014 ◽  
Vol 513-517 ◽  
pp. 1013-1016
Author(s):  
Tao Wang ◽  
Wen Bo Liu
Keyword(s):  
Data Acquisition ◽  
Data Transmission ◽  
Short Range ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Wireless Sensor ◽  
Communications Technology ◽  
Wireless Data ◽  
Wireless Data Acquisition ◽  
New Type

This paper puts forward a new type of wireless data acquisition system design which is based on wireless sensor networks. Using ZigBee short-range wireless communications technology for data transmission, so that the system will not only significantly reduces the amount of equipment, but also makes the system placed flexibly and moves easily. As the whole system-wide monitoring center, FPGA is responsible for getting the data together which is gathered from various nodes in the system and it also controls over the whole system intelligently. The results proved that the system is used simply, and works stably, reliably, fast and efficiently; whats more, it has a broad application prospect.

scholarly journals Homogenization Experiments of Crystal-Rich Inclusions in Spodumene from Jiajika Lithium Deposit, China, under Elevated External Pressures in a Hydrothermal Diamond-Anvil Cell

Geofluids ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Jiankang Li ◽  
I-Ming Chou
Keyword(s):  
Diamond Anvil Cell ◽  
Aqueous Fluid ◽  
Formation Mechanisms ◽  
External Pressures ◽  
Sample Chamber ◽  
New Type ◽  
Diamond Anvil ◽  
In Situ Observations ◽  
Total Dissolution

Extensive studies of the crystal-rich inclusions (CIs) hosted in minerals in pegmatite have resulted in substantially different models for the formation mechanism of the pegmatite. In order to evaluate these previously proposed formation mechanisms, the total homogenization processes of CIs hosted in spodumene from the Jiajika pegmatite deposit in Sichuan, China, were observed in situ under external H2O pressures in a new type of hydrothermal diamond-anvil cell (HDAC). The CIs in a spodumene chip were loaded in the sample chamber of HDAC with water, such that the CIs were under preset external H2O pressures during heating to avoid possible decrepitation. Our in situ observations showed that the crystals within the CIs were dissolved in carbonic-rich aqueous fluid during heating and that cristobalite was usually the first mineral being dissolved, followed by zabuyelite and silicate minerals until their total dissolution at temperatures between 500 and 720°C. These observations indicated that the minerals within the CIs were daughter minerals crystallized from an entrapped carbonate- and silica-rich aqueous solution and therefore provided useful information for evaluating the formation models of granitic pegmatites.

Identification of Marine Soils by Ballistic Penetrometry

1990 ◽  
Vol 112 (4) ◽  
pp. 277-284
Author(s):  
O. Hembise ◽  
P. Guevel ◽  
P. R. Bardey ◽  
J. L. Viaud ◽  
J. Y. Boisson ◽  
...  
Keyword(s):  
High Pressure ◽  
Shape Optimization ◽  
Data Acquisition ◽  
Pressure Sensors ◽  
Physical Characteristics ◽  
In Situ Measurements ◽  
Disposable Sensor ◽  
Course Stability

This article describes a disposable, sensor-filled ballistic penetrator for in-situ measurements during and after penetration into the clayey sediments of the seabed at depths of about 6000 m. The project involved work on several theoretical and experimental aspects of hydrodynamics: penetrator shape optimization, course stability, precision of point of impact. In addition, measurement and data acquisition techniques were developed using high-pressure sensors, and the dynamics of soil penetration and hole-closing were studied. The project led to the implementation of instrument-carrying devices weighing two tonnes, which, by penetrating some 40 m into the clay at impact speeds of the order of 55 m/s, provided valuable information on the physical characteristics of the seabed soils.

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