Articles | Volume 9, issue 2
https://doi.org/10.5194/jsss-9-411-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/jsss-9-411-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Regular research article
| 
27 Nov 2020
Regular research article |
| 27 Nov 2020
| 27 Nov 2020
Random gas mixtures for efficient gas sensor calibration
Tobias Baur
CORRESPONDING AUTHOR
Lab for Measurement Technology, Saarland University, 66123 Saarbrücken, Germany
Manuel Bastuck
Lab for Measurement Technology, Saarland University, 66123 Saarbrücken, Germany
Caroline Schultealbert
Lab for Measurement Technology, Saarland University, 66123 Saarbrücken, Germany
Tilman Sauerwald
Lab for Measurement Technology, Saarland University, 66123 Saarbrücken, Germany
currently at: Fraunhofer Institute for Process Engineering and Packaging IVV, 85354 Freising, Germany
Andreas Schütze
Lab for Measurement Technology, Saarland University, 66123 Saarbrücken, Germany
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Caroline Schultealbert, Iklim Uzun, Tobias Baur, Tilman Sauerwald, and Andreas Schütze
J. Sens. Sens. Syst., 9, 283–292, https://doi.org/10.5194/jsss-9-283-2020, https://doi.org/10.5194/jsss-9-283-2020, 2020
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We present a work on gas sensors that can for example be used for the assessment of indoor air quality. These sensors suffer from deterioration by siloxanes, so we investigated these effects by a distinct operation mode and exposition to this gas that allows us to interpret different reactions on the sensor surface. We found that all processes on the sensor surface are slowed down by this treatment and a self-compensation by the evaluation of oxygen adsorption processes is likely to be found.
Henrik Lensch, Manuel Bastuck, Tobias Baur, Andreas Schütze, and Tilman Sauerwald
J. Sens. Sens. Syst., 8, 161–169, https://doi.org/10.5194/jsss-8-161-2019, https://doi.org/10.5194/jsss-8-161-2019, 2019
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The measurement of humidity in industrial applications is still an important research issue. Especially under rough operation conditions the current humidity sensor comes to its limitations. To this end, we are developing an integrated sensor system using a metal oxide sensor with impedance spectroscopy as multi-signal generation allowing the discrimination of humidity and reducing gases. The submitted paper focuses on the modeling of the humidity-dependent aspects of impedance.
Manuel Bastuck, Tobias Baur, and Andreas Schütze
J. Sens. Sens. Syst., 7, 489–506, https://doi.org/10.5194/jsss-7-489-2018, https://doi.org/10.5194/jsss-7-489-2018, 2018
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Predictions about systems too complex for physical modeling can be made nowadays with data-based models. Our software DAV³E is an easy way to extract relevant features from cyclic raw data, a process often neglected in other software packages, based on mathematical methods, incomplete physical models, or human intuition. Its graphical user interface further provides methods to fuse data from many sensors, to teach a model the prediction of new data, and to check the model’s performance.
Tobias Baur, Caroline Schultealbert, Andreas Schütze, and Tilman Sauerwald
J. Sens. Sens. Syst., 7, 411–419, https://doi.org/10.5194/jsss-7-411-2018, https://doi.org/10.5194/jsss-7-411-2018, 2018
Short summary
Short summary
A novel method for the detection of short pulses of gas at very low concentrations is presented. Applying the method to a doped SnO2 detector, gas pulses down to a dosage of 1 ppb times seconds can be detected. The gas transport inside the detector is simulated using the finite element method (FEM) to optimize the gas transport and to keep response and recovery time as short as possible. With this approach, we have demonstrated a detection limit for ethanol below 47 fg.
Tilman Sauerwald, Tobias Baur, Martin Leidinger, Wolfhard Reimringer, Laurent Spinelle, Michel Gerboles, Gertjan Kok, and Andreas Schütze
J. Sens. Sens. Syst., 7, 235–243, https://doi.org/10.5194/jsss-7-235-2018, https://doi.org/10.5194/jsss-7-235-2018, 2018
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For detection of benzene, a multichannel gas sensor system was tested in two different laboratories at the concentration range from 0.5 ppb up to 10 ppb. A model is used to extract the channels and multilinear regression is done to compensate cross interference to other gases. Depending on the measurement conditions, the quantification accuracy is between ±0.2 ppb and ±2 ppb. Regression models for one laboratory were transferable between the labs under comparable measurement conditions.
Maximilian Koehne, Christopher Schmidt, Satnam Singh, Andreas Grasskamp, Tilman Sauerwald, and Gina Zeh
J. Sens. Sens. Syst., 12, 215–223, https://doi.org/10.5194/jsss-12-215-2023, https://doi.org/10.5194/jsss-12-215-2023, 2023
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Continuous inspection of gases is increasingly important for process monitoring, like fruit ripening. This involves the detection of individual markers in complex gas mixtures, e.g., to indicate spoilage. Unfortunately, classical techniques are lab-bound and resource-intensive. Hence, small, low-cost systems are being developed. Thereto, we propose a sensor system, containing a non-heated gas separation unit and gas sensors combined with a compensation of surrounding temperature effects.
Andreas T. Grasskamp, Satnam Singh, Helen Haug, and Tilman Sauerwald
J. Sens. Sens. Syst., 12, 93–101, https://doi.org/10.5194/jsss-12-93-2023, https://doi.org/10.5194/jsss-12-93-2023, 2023
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In this work, we have developed and validated a semi-automatic approach that greatly reduces the amount of interaction and effort needed for analyzing samples via gas chromatography–mass spectrometry. Further, unlike many other approaches, our developed tool is accessible to the novice and does not require any programming experience. Using whisky as an example substance, we show how the analysis method compares to conventional software, and we validate our approach against that.
Tanja Dorst, Tizian Schneider, Sascha Eichstädt, and Andreas Schütze
J. Sens. Sens. Syst., 12, 45–60, https://doi.org/10.5194/jsss-12-45-2023, https://doi.org/10.5194/jsss-12-45-2023, 2023
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A fundamental problem of machine learning (ML) is measurement uncertainty and the influence on ML results. Measurement uncertainty, which is critical in hazardous gas detection, is directly addressed in this paper. A previously published toolbox is extended for regression. One of the benefits of this approach is obtaining a better understanding of where the overall system should be improved. This can be achieved by either improving the trained ML model or using a sensor with higher precision.
Tanja Dorst, Yannick Robin, Sascha Eichstädt, Andreas Schütze, and Tizian Schneider
J. Sens. Sens. Syst., 10, 233–245, https://doi.org/10.5194/jsss-10-233-2021, https://doi.org/10.5194/jsss-10-233-2021, 2021
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Synchronization problems within distributed sensor networks are a major challenge in the field of Industry 4.0. In this paper, artificially generated time shifts between sensor data and their influence on remaining useful lifetime prediction of electromechanical cylinders are investigated. It is shown that time shifts within sensor data lead to poor remaining useful lifetime predictions. However, this prediction can be significantly improved using various methods as shown in this contribution.
Caroline Schultealbert, Iklim Uzun, Tobias Baur, Tilman Sauerwald, and Andreas Schütze
J. Sens. Sens. Syst., 9, 283–292, https://doi.org/10.5194/jsss-9-283-2020, https://doi.org/10.5194/jsss-9-283-2020, 2020
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We present a work on gas sensors that can for example be used for the assessment of indoor air quality. These sensors suffer from deterioration by siloxanes, so we investigated these effects by a distinct operation mode and exposition to this gas that allows us to interpret different reactions on the sensor surface. We found that all processes on the sensor surface are slowed down by this treatment and a self-compensation by the evaluation of oxygen adsorption processes is likely to be found.
Marius Rodner, Manuel Bastuck, Andreas Schütze, Mike Andersson, Joni Huotari, Jarkko Puustinen, Jyrki Lappalainen, and Tilman Sauerwald
J. Sens. Sens. Syst., 8, 261–267, https://doi.org/10.5194/jsss-8-261-2019, https://doi.org/10.5194/jsss-8-261-2019, 2019
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To fulfil today's requirements, gas sensors have to become more and more sensitive and selective. In this work, we present a novel method to significantly enhance the effect of gate bias on the response of a SiC field-effect transistor by placing a lithium-doped tungsten oxide film beneath the gate. This enhancement, compared to undoped samples, opens new perspectives for static and transient signal generation, e.g. gate bias-cycled operation, and, thus, increasing sensitivity and selectivity.
Henrik Lensch, Manuel Bastuck, Tobias Baur, Andreas Schütze, and Tilman Sauerwald
J. Sens. Sens. Syst., 8, 161–169, https://doi.org/10.5194/jsss-8-161-2019, https://doi.org/10.5194/jsss-8-161-2019, 2019
Short summary
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The measurement of humidity in industrial applications is still an important research issue. Especially under rough operation conditions the current humidity sensor comes to its limitations. To this end, we are developing an integrated sensor system using a metal oxide sensor with impedance spectroscopy as multi-signal generation allowing the discrimination of humidity and reducing gases. The submitted paper focuses on the modeling of the humidity-dependent aspects of impedance.
Manuel Bastuck, Tobias Baur, and Andreas Schütze
J. Sens. Sens. Syst., 7, 489–506, https://doi.org/10.5194/jsss-7-489-2018, https://doi.org/10.5194/jsss-7-489-2018, 2018
Short summary
Short summary
Predictions about systems too complex for physical modeling can be made nowadays with data-based models. Our software DAV³E is an easy way to extract relevant features from cyclic raw data, a process often neglected in other software packages, based on mathematical methods, incomplete physical models, or human intuition. Its graphical user interface further provides methods to fuse data from many sensors, to teach a model the prediction of new data, and to check the model’s performance.
Tobias Baur, Caroline Schultealbert, Andreas Schütze, and Tilman Sauerwald
J. Sens. Sens. Syst., 7, 411–419, https://doi.org/10.5194/jsss-7-411-2018, https://doi.org/10.5194/jsss-7-411-2018, 2018
Short summary
Short summary
A novel method for the detection of short pulses of gas at very low concentrations is presented. Applying the method to a doped SnO2 detector, gas pulses down to a dosage of 1 ppb times seconds can be detected. The gas transport inside the detector is simulated using the finite element method (FEM) to optimize the gas transport and to keep response and recovery time as short as possible. With this approach, we have demonstrated a detection limit for ethanol below 47 fg.
Andreas Schütze, Nikolai Helwig, and Tizian Schneider
J. Sens. Sens. Syst., 7, 359–371, https://doi.org/10.5194/jsss-7-359-2018, https://doi.org/10.5194/jsss-7-359-2018, 2018
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“Industrie 4.0” or the Industrial Internet of Things (IIoT) describe the current (r)evolution in industrial automation and control. This is fundamentally based on smart sensors, which generate data and allow further functionality from self-monitoring and self-configuration to condition monitoring of complex processes. The paper reviews the development of sensor technology over the last 2 centuries and highlights some of the potential that can be achieved with smart sensors and data analysis.
Tilman Sauerwald, Tobias Baur, Martin Leidinger, Wolfhard Reimringer, Laurent Spinelle, Michel Gerboles, Gertjan Kok, and Andreas Schütze
J. Sens. Sens. Syst., 7, 235–243, https://doi.org/10.5194/jsss-7-235-2018, https://doi.org/10.5194/jsss-7-235-2018, 2018
Short summary
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For detection of benzene, a multichannel gas sensor system was tested in two different laboratories at the concentration range from 0.5 ppb up to 10 ppb. A model is used to extract the channels and multilinear regression is done to compensate cross interference to other gases. Depending on the measurement conditions, the quantification accuracy is between ±0.2 ppb and ±2 ppb. Regression models for one laboratory were transferable between the labs under comparable measurement conditions.
Martin Leidinger, Joni Huotari, Tilman Sauerwald, Jyrki Lappalainen, and Andreas Schütze
J. Sens. Sens. Syst., 5, 147–156, https://doi.org/10.5194/jsss-5-147-2016, https://doi.org/10.5194/jsss-5-147-2016, 2016
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For the application of indoor air quality monitoring, two types of tungsten oxide gas sensor layers were prepared via pulsed laser deposition. Analysis of the structure of the produced layers showed that they consist of nanoparticles and agglomerates of nanoparticles. The sensors showed significant sensitivity and selectivity towards naphthalene in the ppb concentration range. The results were achieved using temperature cycled operation of the sensors and pattern recognition signal treatment.
M. Schüler, T. Sauerwald, and A. Schütze
J. Sens. Sens. Syst., 4, 305–311, https://doi.org/10.5194/jsss-4-305-2015, https://doi.org/10.5194/jsss-4-305-2015, 2015
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We study the effect of HMDSO vapor on an SnO2-based gas sensor in temperature cycled operation (TCO). The poisoning can be quantified at early stages with a resolution of ±85 ppm*min using TCO. This approach provides a simple method for early detection of HMDSO poisoning.
The stability of gas discrimination by linear discriminant analysis (LDA) can be improved using normalization, which in turn facilitates a more accurate determination of the poisoning state by hierarchical LDA discrimination.
B. Schmitt, C. Kiefer, and A. Schütze
J. Sens. Sens. Syst., 4, 239–247, https://doi.org/10.5194/jsss-4-239-2015, https://doi.org/10.5194/jsss-4-239-2015, 2015
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A novel sensor principle for determining binary fluid mixtures of known components is presented. A bluff body is placed in the fluid channel, causing the formation of a stationary pair of vortices behind the body. The length of the vortex pair depends on the mixture’s viscosity and thus its composition. It is measured by placing a microheater in the vortex area and making use of forced convection which changes with the size of the vortices.
D. Puglisi, J. Eriksson, C. Bur, A. Schuetze, A. Lloyd Spetz, and M. Andersson
J. Sens. Sens. Syst., 4, 1–8, https://doi.org/10.5194/jsss-4-1-2015, https://doi.org/10.5194/jsss-4-1-2015, 2015
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This study aims at the development of high-performance and cost-efficient gas sensors for sensitive detection of three specific hazardous gases, i.e., formaldehyde, naphthalene, and benzene, commonly present in indoor environments in concentrations of health concern. We used silicon carbide field effect transistors to investigate the sensor performance and characteristics under different levels of relative humidity up to 60%, demonstrating excellent detection limits in the sub-ppb range.
C. Bur, M. Bastuck, A. Schütze, J. Juuti, A. Lloyd Spetz, and M. Andersson
J. Sens. Sens. Syst., 3, 305–313, https://doi.org/10.5194/jsss-3-305-2014, https://doi.org/10.5194/jsss-3-305-2014, 2014
M. Leidinger, T. Sauerwald, W. Reimringer, G. Ventura, and A. Schütze
J. Sens. Sens. Syst., 3, 253–263, https://doi.org/10.5194/jsss-3-253-2014, https://doi.org/10.5194/jsss-3-253-2014, 2014
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An approach for detecting hazardous volatile organic compounds (VOCs) in ppb and sub-ppb concentrations is presented. Using metal oxide semiconductor (MOS) gas sensors in temperature cycled operation, VOCs in trace concentrations are successfully identified against a varying ethanol background of up to 2 ppm. For signal processing, linear discriminant analysis is applied to single sensor data and sensor fusion data. Integrated gas sensor systems using the same MOS sensors were characterized.
M. Schüler, T. Sauerwald, and A. Schütze
J. Sens. Sens. Syst., 3, 213–221, https://doi.org/10.5194/jsss-3-213-2014, https://doi.org/10.5194/jsss-3-213-2014, 2014
T. Bley, E. Pignanelli, and A. Schütze
J. Sens. Sens. Syst., 3, 121–132, https://doi.org/10.5194/jsss-3-121-2014, https://doi.org/10.5194/jsss-3-121-2014, 2014
M. Bastuck, C. Bur, A. Lloyd Spetz, M. Andersson, and A. Schütze
J. Sens. Sens. Syst., 3, 9–19, https://doi.org/10.5194/jsss-3-9-2014, https://doi.org/10.5194/jsss-3-9-2014, 2014
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Methods to investigate the temperature distribution of heated ceramic gas sensors for high-temperature applications
Gauge to simultaneously determine the electrical conductivity, the Hall constant, and the Seebeck coefficient up to 800 °C
Precise characterization of VCSEL in the 1550 nm band having a wavelength tuning range of 12 nm within 10 µs as light sources for fast sensor systems
An algorithmic method for the identification of wood species and the classification of post-consumer wood using fluorescence lifetime imaging microscopy
High-temperature behavior of housed piezoelectric resonators based on CTGS
Investigation of a metrological atomic force microscope system with a combined cantilever position, bending and torsion detection system
Novel, low-cost device to simultaneously measure the electrical conductivity and the Hall coefficient from room temperature up to 600 °C
Characterization of ceramics based on laser speckle photometry
Optimization of soot deposition by high-temperature prepolarization of a resistive particulate matter sensor
Comparison of different fiber coatings for distributed strain measurement in cementitious matrices
Measurement of the Beruforge 152DL thin-film lubricant using a developed thin-film thickness standard
Analysis and optimization of a cone flowmeter performance by means of a numerical and experimental approach
Dynamic characterization of multi-component sensors for force and moment
Field evaluation of a low-cost indoor air quality monitor to quantify exposure to pollutants in residential environments
In situ high-temperature gas sensors: continuous monitoring of the combustion quality of different wood combustion systems and optimization of combustion process
Transferable micromachined piezoresistive force sensor with integrated double-meander-spring system
Oxygen transport in epitaxial SrTiO3/SrTi1 − xFexO3 multilayer stacks
Fibre optic sensing system for monitoring of current collectors and overhead contact lines of railways
Optimization of a sensor for a Tian–Calvet calorimeter with LTCC-based sensor discs
Characterisation of the polarisation state of embedded piezoelectric transducers by thermal waves and thermal pulses
Investigation of dielectric properties of multilayer structures consisting of homogeneous plastics and liquid solutions at 75–110 GHz
A systematic MEMS sensor calibration framework
Monitoring human serum albumin cell cultures using surface plasmon resonance (SPR) spectroscopy
Alternative strategy for manufacturing of all-solid-state reference electrodes for potentiometry
Carbon monoxide gas sensing properties of Ga-doped ZnO film grown by ion plating with DC arc discharge
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Thomas Wöhrl, Julia Herrmann, Jaroslaw Kita, Ralf Moos, and Gunter Hagen
J. Sens. Sens. Syst., 12, 205–214, https://doi.org/10.5194/jsss-12-205-2023, https://doi.org/10.5194/jsss-12-205-2023, 2023
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Sensors for detecting various gases, such as nitrogen oxides, play a major role in times of climate change in protecting the environment from the possible toxic influences of such gases. Due to their usually complex design, gas sensors may react to changes in the operating temperature, which can occur due to different ambient influences. This article shows two methods for accurately measuring the temperature on the surface of a sensor under realistic conditions.
Robin Werner, Jaroslaw Kita, Michael Gollner, Florian Linseis, and Ralf Moos
J. Sens. Sens. Syst., 12, 69–84, https://doi.org/10.5194/jsss-12-69-2023, https://doi.org/10.5194/jsss-12-69-2023, 2023
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A high-temperature gauge to simultaneously determine electrical conductivity, the Hall constant, and the Seebeck coefficient was developed. Screen-printed heating structures on a ceramic sample holder generate temperatures up to 800 °C. Heating structures were designed using FEM simulations. The temperature distribution was validated by thermal imaging. Measurements on constantan (reference material) and boron-doped silicon wafer confirm the functionality of the gauge up to 800 °C.
Roman Kruglov, Gregor Saur, and Rainer Engelbrecht
J. Sens. Sens. Syst., 11, 161–169, https://doi.org/10.5194/jsss-11-161-2022, https://doi.org/10.5194/jsss-11-161-2022, 2022
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Gas analysis by absorption spectroscopy helps to optimize combustion processes in engines. Optical distance sensors are non-contact and offer high accuracy and precision. Both sensor applications benefit from light sources with a rapidly swept wavelength to monitor dynamic processes. In our paper, we precisely characterize the dynamic wavelength sweep of a rapidly pulsed VCSEL (vertical cavity surface emitting laser), a tiny semiconductor laser well suited for optical sensing.
Nina Leiter, Maximilian Wohlschläger, Martin Versen, and Christian Laforsch
J. Sens. Sens. Syst., 11, 129–136, https://doi.org/10.5194/jsss-11-129-2022, https://doi.org/10.5194/jsss-11-129-2022, 2022
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In this contribution the frequency domain fluorescence lifetime imaging microscopy (FD-FLIM) technique is evaluated for post-consumer wood sorting. The measured data were processed using algorithmic decision trees to identify the wood species and post-consumer wood category. The experimental results revealed the high potential of the FD-FLIM technique for automated post-consumer wood sorting.
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J. Sens. Sens. Syst., 10, 271–279, https://doi.org/10.5194/jsss-10-271-2021, https://doi.org/10.5194/jsss-10-271-2021, 2021
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Temperature sensors based on piezoelectric devices enable precise measurement of temperature changes in harsh environments such as high temperatures or aggressive atmospheres. In the case of this device, the change in the temperature is detected by means of the changing resonance frequency of the sensor. Here a sensor device based on catangasite (an isomorph of quartz) is presented. We discuss its behavior at elevated temperatures and confirm that it can successfully operate up to 1030 °C.
Yiting Wu, Elisa Wirthmann, Ute Klöpzig, and Tino Hausotte
J. Sens. Sens. Syst., 10, 171–177, https://doi.org/10.5194/jsss-10-171-2021, https://doi.org/10.5194/jsss-10-171-2021, 2021
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Robin Werner, Jaroslaw Kita, Michael Gollner, Florian Linseis, and Ralf Moos
J. Sens. Sens. Syst., 10, 71–81, https://doi.org/10.5194/jsss-10-71-2021, https://doi.org/10.5194/jsss-10-71-2021, 2021
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A novel, low-cost measurement device for simultaneous high temperature measurements of the electrical conductivity and Hall coefficient has been developed. Simulations were used to design a suitable screen-printed planar platinum heating structure that generates temperatures of up to 600 °C. Simulations of the temperature distribution have been validated using thermal imaging. Measurements were compared with data from the literature to validate the functionality of the novel device.
Lili Chen, Ulana Cikalova, Beatrice Bendjus, Stefan Muench, and Mike Roellig
J. Sens. Sens. Syst., 9, 345–354, https://doi.org/10.5194/jsss-9-345-2020, https://doi.org/10.5194/jsss-9-345-2020, 2020
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This paper describes an optical sensor system based on the technique of laser speckle photometry (LSP) for the application of stress characterization and defect detection in ceramics. The purpose of the research is to develop an in-line inspection solution for the industrial field. The preliminary results show that the LSP technique has the potential to fulfill the task.
Jens Ebel, Carolin Schilling, and Holger Fritze
J. Sens. Sens. Syst., 9, 263–271, https://doi.org/10.5194/jsss-9-263-2020, https://doi.org/10.5194/jsss-9-263-2020, 2020
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In a very specific way, this research paper shows how established systems – in this case a commercial soot sensor for the automotive sector – can be optimized by diving deep into the basic research. The approach here is to link macroscopic observations or signal behavior with processes taking place on the atomic level. Taking these fundamental processes into account, the sensor's specific response time could be shortened effectively by a change in operating strategy – without any design changes.
Martin Weisbrich, Klaus Holschemacher, and Thomas Bier
J. Sens. Sens. Syst., 9, 189–197, https://doi.org/10.5194/jsss-9-189-2020, https://doi.org/10.5194/jsss-9-189-2020, 2020
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Distributed fiber optic strain measurement based on Rayleigh scattering enables the monitoring of strain along the entire fiber length and the possibility of integration into material matrices. In this article, optical fibers were integrated into the concrete matrix of small prisms to measure the deformation by drying. In comparison with a reference measuring method, the losses of strain transfer were measured. The analysis shows a high correlation between the reference method and the fiber.
Sebastian Metzner, Tamara Reuter, and Tino Hausotte
J. Sens. Sens. Syst., 9, 157–165, https://doi.org/10.5194/jsss-9-157-2020, https://doi.org/10.5194/jsss-9-157-2020, 2020
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For the determination of the refractive index of the lubricant used in the sheet-bulk metal forming process, a lubricant thin-film thickness standard was developed which represents a continuous measuring range from 6 to 100 μm. To determine the refractive index, the thin-film thickness standard was measured with a coaxial interferometric measurement system in various thickness ranges. The results show changing optical properties with increasing layer thickness.
Giuseppe Dinardo, Laura Fabbiano, and Gaetano Vacca
J. Sens. Sens. Syst., 8, 269–283, https://doi.org/10.5194/jsss-8-269-2019, https://doi.org/10.5194/jsss-8-269-2019, 2019
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The paper deals with the proposal of a new obstruction flowmeter (cone type) characterized by an improved geometry. Compared with a standard geometry cone flowmeter, the proposed one ensures better performance in terms of a higher discharge coefficient and less permanent pressure drops. Additionally, several experimental tests and numerical simulations have been performed to compare the overall performance granted by both flowmeters, endorsing the superiority of the proposed solution.
Jan Nitsche, Rolf Kumme, and Rainer Tutsch
J. Sens. Sens. Syst., 7, 577–586, https://doi.org/10.5194/jsss-7-577-2018, https://doi.org/10.5194/jsss-7-577-2018, 2018
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Multi-component sensors for force and moment are commonly used in different areas as robotics, crash tests or material testing. The dynamic behaviour of such sensors may differ significantly from the static behaviour. To analyse the dynamic characteristics, we developed an improved test set-up for periodic excitation. It consists of an electrodynamic shaker, adapting elements and different acceleration references. The first experiments show good results for periodic excitation up to 1000 Hz.
Alejandro Moreno-Rangel, Tim Sharpe, Filbert Musau, and Gráinne McGill
J. Sens. Sens. Syst., 7, 373–388, https://doi.org/10.5194/jsss-7-373-2018, https://doi.org/10.5194/jsss-7-373-2018, 2018
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We compared the temperature, relative humidity, total volatile organic compounds, carbon dioxide equivalents, and fine particulate matter measurements from Foobot to highly accurate instruments. The results suggest that Foobot offers a relatively low-cost and straightforward solution for identifying high pollutant exposures with potential health risks and for providing data at high granularity. Foobot characteristics make it a useful tool to evaluate occupant pollutant exposure.
Heinz Kohler, Binayak Ojha, Navas Illyaskutty, Ingo Hartmann, Christian Thiel, Konrad Eisinger, and Markus Dambacher
J. Sens. Sens. Syst., 7, 161–167, https://doi.org/10.5194/jsss-7-161-2018, https://doi.org/10.5194/jsss-7-161-2018, 2018
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Wood-log- and wood-chip-fuelled low-power combustion systems emit high amounts of uncombusted gaseous components like CO and particulate matter. Emissions can be effectively reduced by optimized combustion process control using high-temperature gas sensors. The sensing behaviour of gas sensors for continuous analysis of uncombusted components and their long-term stability have been studied. The sensor signals are used to improve the combustion process control and to monitor combustion quality.
Gerry Hamdana, Maik Bertke, Lutz Doering, Thomas Frank, Uwe Brand, Hutomo Suryo Wasisto, and Erwin Peiner
J. Sens. Sens. Syst., 6, 121–133, https://doi.org/10.5194/jsss-6-121-2017, https://doi.org/10.5194/jsss-6-121-2017, 2017
Michal Schulz, Timna Orland, Alexander Mehlmann, Avner Rothschild, and Holger Fritze
J. Sens. Sens. Syst., 6, 107–119, https://doi.org/10.5194/jsss-6-107-2017, https://doi.org/10.5194/jsss-6-107-2017, 2017
Kerstin Schröder, Manfred Rothhardt, Wolfgang Ecke, Uwe Richter, André Sonntag, and Hartmut Bartelt
J. Sens. Sens. Syst., 6, 77–85, https://doi.org/10.5194/jsss-6-77-2017, https://doi.org/10.5194/jsss-6-77-2017, 2017
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Fibre optic sensors are excellent tools for monitoring (with) high-voltage current collectors. They are easily integrated into the collector strip and specialized for detection of events like hits on the strip. The sensing system can be used in regular trains and make monitoring of the overhead contact line routine, which is done "along the way", helping not only to prevent accidents by small intruders, but also allowing the prediction of wear and is used to optimize service and repair cycles.
Franz Schubert, Michael Gollner, Jaroslaw Kita, Florian Linseis, and Ralf Moos
J. Sens. Sens. Syst., 5, 381–388, https://doi.org/10.5194/jsss-5-381-2016, https://doi.org/10.5194/jsss-5-381-2016, 2016
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An FEM model is used to improve the sensor design of a Tian–Calvet calorimeter. By modifying the basic part of the sensor (a sensor disc based on low temperature co-fired ceramics), the sensitivity was increased by a factor of 3. The model was validated and the sensors were calibrated. Indium and tin samples were measured. The melting temperatures show a deviation of 0.2 K while the enthalpy was measured with a precision better than 1 %. The values for tin deviate by less than 2 % from literature.
Agnes Eydam, Gunnar Suchaneck, and Gerald Gerlach
J. Sens. Sens. Syst., 5, 165–170, https://doi.org/10.5194/jsss-5-165-2016, https://doi.org/10.5194/jsss-5-165-2016, 2016
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Piezoelectric devices are characterized non-destructively to ensure their functionality. The material is heated by laser diodes. The resulting temperature changes lead to a pyroelectric current. Analytical and numerical finite element models describe the temperature distribution and the current in frequency and time domain. Modelling and experimental results are compared for piezoelectric plates and integrated sensors and actuators.
M. Klenner, T. Abels, C. Zech, A. Hülsmann, M. Schlechtweg, and O. Ambacher
J. Sens. Sens. Syst., 4, 125–131, https://doi.org/10.5194/jsss-4-125-2015, https://doi.org/10.5194/jsss-4-125-2015, 2015
A. Dickow and G. Feiertag
J. Sens. Sens. Syst., 4, 97–102, https://doi.org/10.5194/jsss-4-97-2015, https://doi.org/10.5194/jsss-4-97-2015, 2015
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In this paper we present a systematic method to determine sets of close-to-optimal sensor calibration points for a polynomial approximation.For each set of calibration points a polynomial is used to fit the nonlinear sensor response to the calibration reference. The polynomial parameters are calculated using ordinary least square fit. In an experiment, barometric MEMS pressure sensors are calibrated using the proposed calibration method at several temperatures and pressures.
A. Henseleit, C. Pohl, Th. Bley, and E. Boschke
J. Sens. Sens. Syst., 4, 77–83, https://doi.org/10.5194/jsss-4-77-2015, https://doi.org/10.5194/jsss-4-77-2015, 2015
J. C. B. Fernandes and E. V. Heinke
J. Sens. Sens. Syst., 4, 53–61, https://doi.org/10.5194/jsss-4-53-2015, https://doi.org/10.5194/jsss-4-53-2015, 2015
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All-solid-state reference electrodes were developed based on particles of graphite/silver/silver chloride synthesized by electroless deposition of metallic silver and silver chloride on graphite powder. These electrodes were not sensitive to abrasion, redox species, pH and high-pressure saturated steam, and were applied successfully in potentiometric cells to measure pH and potassium ions in a complex matrix by direct potentiometry and L-ascorbic acid by potentiometric titration.
S. Kishimoto, S. Akamatsu, H. Song, J. Nomoto, H. Makino, and T. Yamamoto
J. Sens. Sens. Syst., 3, 331–334, https://doi.org/10.5194/jsss-3-331-2014, https://doi.org/10.5194/jsss-3-331-2014, 2014
A. Lorek
J. Sens. Sens. Syst., 3, 177–185, https://doi.org/10.5194/jsss-3-177-2014, https://doi.org/10.5194/jsss-3-177-2014, 2014
T. Waber, M. Sax, W. Pahl, S. Stufler, A. Leidl, M. Günther, and G. Feiertag
J. Sens. Sens. Syst., 3, 167–175, https://doi.org/10.5194/jsss-3-167-2014, https://doi.org/10.5194/jsss-3-167-2014, 2014
N. Orlowski, H.-G. Frede, N. Brüggemann, and L. Breuer
J. Sens. Sens. Syst., 2, 179–193, https://doi.org/10.5194/jsss-2-179-2013, https://doi.org/10.5194/jsss-2-179-2013, 2013
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Short summary
Applications like air quality, fire detection and detection of explosives require selective and quantitative measurements in an ever-changing background of interfering gases. One main issue hindering the successful implementation of gas sensors in real-world applications is the lack of appropriate calibration procedures for advanced gas sensor systems. This article presents a calibration scheme for gas sensors based on gas profiles with unique randomized gas mixtures.
Applications like air quality, fire detection and detection of explosives require selective and...
Special issue