Articles | Volume 4, issue 1
J. Sens. Sens. Syst., 4, 199–208, 2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Regular research article
02 Jun 2015
Regular research article | 02 Jun 2015
Micro- and nanocoordinate measurements of micro-parts with 3-D tunnelling current probing
A. Schuler et al.
No articles found.
Christian Orgeldinger, Florian Wohlgemuth, Andreas Michael Müller, and Tino Hausotte
J. Sens. Sens. Syst., 11, 219–223,Short summary
Industrial X-ray computed tomography is a holistic measurement technique for dimensional metrology. However, the relatively long measurement time is a hindrance to its application. A possibility to reduce measurement times, the continuous scan mode, is characterized in this work. The question is how much the time reduction impacts the accuracy of the dimensional measurements. The core result of the paper is an estimate of the effect along with experimental proof that this estimate is reasonable.
Florian Wohlgemuth, Tino Hausotte, Ingomar Schmidt, Wolfgang Kimmig, and Karl Dietrich Imkamp
J. Sens. Sens. Syst., 11, 171–186,Short summary
Acceptance and reverification testing for industrial CT systems is described in different standards. The characterisation and testing of CT system performance are often achieved with test artefacts containing spheres. This simulative study characterises the influence of different geometrical error sources – or geometrical misalignments – on these sphere measurements.
Martin Lerchen, Julien Schinn, and Tino Hausotte
J. Sens. Sens. Syst., 10, 247–259,Short summary
In order to contribute to a standardisation and process monitoring of additive manufacturing (AM) processes, a novel referencing approach was developed to improve the assessment of geometric manufacturing and measurement deviations. This is based on a referencing system integrated in the powder bed, which enables a shortening of the measuring loop. The position-stable quartz glass pipes enable more precise specification of lateral manufacturing and measurement deviations during AM.
Martin Lerchen, Jakob Hornung, Yu Zou, and Tino Hausotte
J. Sens. Sens. Syst., 10, 219–232,Short summary
The publication contributes to a uniform procedure for in-process measurement data acquisition in additive manufacturing, which is essential for a controlled correction of detected manufacturing deviations. The developed methodology is based on an analysis of the melt pool contours relative to a referencing system integrated in the powder bed. By recording the referenced melt pool and the shimmering contours after powder application, manufacturing deviations can be evaluated more accurately.
Yiting Wu, Elisa Wirthmann, Ute Klöpzig, and Tino Hausotte
J. Sens. Sens. Syst., 10, 171–177,Short summary
A new metrological atomic force microscope (MAFM) head design is shown. We investigated the MAFM head in the nanomeasuring machine (NMM-1) for different high-precision and large-scale traceable measurement tasks. Due to their integration, the MAFM head can benefit from the large measuring range, high-precision and traceability of the NMM-1 for efficient measurements on different samples. The presented results show the realised macroscale measurements with sub-nanometre resolution.
Sebastian Metzner, Tamara Reuter, and Tino Hausotte
J. Sens. Sens. Syst., 9, 157–165,Short summary
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.
Andreas Michael Müller and Tino Hausotte
J. Sens. Sens. Syst., 9, 61–70,Short summary
The framework of the single point uncertainty presents a methodology to determine the local measurement uncertainty for a measurement setup. The targets of the investigation were spur (involute) steel gear wheels using a CMM in scanning mode in combination with a rotatory table, as well as a single scan of the complete gear profile without the use of a rotatory table, using the
free-form scanCMM functionality. Both methods were examined with respect to their obtained single point uncertainty.
Andreas Michael Müller, Dominik Schubert, Dietmar Drummer, and Tino Hausotte
J. Sens. Sens. Syst., 9, 51–60,Short summary
This paper aims to demonstrate the complete workflow of the determination of the local measurement uncertainty and its components (systematic and random measurement error) for a given measurement task. It was shown for an optical measurement setup in combination with an industrial X-ray computed tomography reference measurement system that different necessary colouring methods of polymer gear wheels have a measurable influence on the local distribution of the measurement uncertainty.
Andreas Michael Müller and Tino Hausotte
J. Sens. Sens. Syst., 7, 551–557,Short summary
Computed tomography measurements can be subject to specific image artefacts, which can be dependent on the effective rotation axis of the work piece during the scan. The presented approach is to combine several CT scans with different rotation axes of the work piece using a data fusion approach. To improve the fidelity of the result, surface points are weighted individually within the algorithm, dependent on the local surface quality of the measurement.
A. Loderer and T. Hausotte
J. Sens. Sens. Syst., 5, 1–8,Short summary
This article describes a new qualification concept for dimensional measurements on optical measuring systems, using the example of a prototypical multi-scale multi-sensor fringe projection system for production-related inspections of sheet-bulk metal-formed parts. A new concept is developed for determining the orientations and positions of the sensors' measuring ranges in a common coordinate system. The principle element of the concept is a newly developed flexible reference artefact.
Related subject area
Measurement systems: Sensor signal processing and electronicsSmart in-cylinder pressure sensor for closed-loop combustion controlEfficient transient testing procedure using a novel experience replay particle swarm optimizer for THD-based robust design and optimization of self-X sensory electronics in industry 4.0Intelligent fault detection of electrical assemblies using hierarchical convolutional networks for supporting automatic optical inspection systemsMeasurement uncertainty analysis of field-programmable gate-array-based, real-time signal processing for ultrasound flow imagingCompilation of training datasets for use of convolutional neural networks supporting automatic inspection processes in industry 4.0 based electronic manufacturingEmploying correlation for wireless components and device characterization in reverberation chambersImpedance model for a high-temperature ceramic humidity sensorNon-destructive testing of arbitrarily shaped refractive objects with millimetre-wave synthetic aperture radar imagingDetermining the dimension of subsurface defects by active infrared thermography – experimental researchInverse calculation of strain profiles from ETDR measurements using artificial neural networksAn ultra-low noise capacitance to voltage converter for sensor applications in 0.35 µm CMOSDevelopment of a non-contact torque transducer based on the laser speckle contrast methodDevelopment of a chopper charge amplifier for measuring the cavity pressure inside injection moulding tools and signal optimisation with a Kalman filterOptimized mixed-domain signal synthesis for broadband impedance spectroscopy measurements on lithium ion cells for automotive applicationsHigh-accuracy current measurement with low-cost shunts by means of dynamic error correctionA compact readout platform for spectral-optical sensorsHigh-speed camera-based measurement system for aeroacoustic investigationsShutter-less calibration of uncooled infrared camerasA novel approach for detecting HMDSO poisoning of metal oxide gas sensors and improving their stability by temperature cycled operationAn electrical characterisation system for the real-time acquisition of multiple independent sensing parameters from organic thin film transistorsPiezoelectric transceiver matching for multiple frequenciesMetal oxide semiconductor gas sensor self-test using Fourier-based impedance spectroscopyWork area monitoring in dynamic environments using multiple auto-aligning 3-D sensorsPrincipal component analysis for fast and automated thermographic inspection of internal structures in sandwich partsNear-field interrogation of SAW resonators on rotating machineryMagnetic properties of CHAMP and their effects on in-orbit calibration
Dennis Vollberg, Peter Gibson, Günter Schultes, Hans-Werner Groh, and Thomas Heinze
J. Sens. Sens. Syst., 11, 1–13,Short summary
We developed a smart in-cylinder pressure sensor for closed-loop combustion control. The sensor concept is based on a robust and reliable steel membrane equipped with highly strain-sensitive and temperature-stable thin films. The sensor system is complemented by a smart electronics allowing real-time data processing for calculation of different combustion parameters. The data are utilized to control the igniting timing of a spark plug for efficient operation of a combustion engine.
Qummar Zaman, Senan Alraho, and Andreas König
J. Sens. Sens. Syst., 10, 193–206,Short summary
A novel experience replay particle swarm optimization algorithm is presented and successfully deployed to improve the optimization performance for reconfigurable analog integrated circuits of industry 4.0. An optimization approach is introduced that relied on THD-based indirect measurement method that varies from the traditional calibration approach. Instead, the proposed calibration methodology optimizes all characteristics of the reconfigurable amplifier at once.
Alida Ilse Maria Schwebig and Rainer Tutsch
J. Sens. Sens. Syst., 9, 363–374,Short summary
In order to further increase the performance of neural networks in the field of optical quality assurance of soldered joints, a hierarchical classifier can be used instead of a single network. The global expansion of the classifier enables the inspection task to be distributed over several subnetworks, which results in higher accuracy. Since the individual sub-models only concentrate on the identification of certain characteristics, categorical problems can be solved more effectively.
Richard Nauber, Lars Büttner, and Jürgen Czarske
J. Sens. Sens. Syst., 9, 227–238,Short summary
To improve the energy efficiency of industrial processes, such as continuous steel casting, lab-scale experiments with liquid metals are performed. We present an ultrasound Doppler signal process for multiplane, high-frame-rate flow imaging. We achieve real-time operations with an efficient implementation in a field-programmable gate array (FPGA). We analyze the contributions to the uncertainty of the velocity measurement and relate it to its fundamental limit.
Alida Ilse Maria Schwebig and Rainer Tutsch
J. Sens. Sens. Syst., 9, 167–178,Short summary
This article presents a classification concept based on deep learning as an additional optical test method for real-time visualization and analysis of electrical assemblies in the production environment. For this purpose, a neural convolutional network is used to identify the quality of the solder joint of surface-mounted chip components in the inspection images. The concept can be used to increase the detection performance of the solder joint inspection systems.
Christoph Cammin, Dmytro Krush, Ralf Heynicke, and Gerd Scholl
J. Sens. Sens. Syst., 8, 185–194,Short summary
Reverberation chambers are well-proven test environments for RF measurements. Typically, mean values are taken from the measurements to characterize the equipment under test. In the novel approach presented in this paper, the correlation of measured sample sequences is utilized to detect deviations, in particular of the radiation characteristics, from reference equipment.
Henrik Lensch, Manuel Bastuck, Tobias Baur, Andreas Schütze, and Tilman Sauerwald
J. Sens. Sens. Syst., 8, 161–169,Short summary
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.
Ingrid Ullmann, Julian Adametz, Daniel Oppelt, Andreas Benedikter, and Martin Vossiek
J. Sens. Sens. Syst., 7, 309–317,Short summary
Millimetre-wave radar is an emerging technique for non-destructive testing: it is less costly than X-rays and has no ionizing radiation. Compared to ultrasound it does not require the device under test to be immersed in water. This article presents methods for high-resolution millimetre-wave radar imaging without a priori knowledge of the object's shape. A polymer device with simulated material defects is examined, which could be depicted precisely.
J. Sens. Sens. Syst., 7, 153–160,
Robin Höhne, Pawel Kostka, and Niels Modler
J. Sens. Sens. Syst., 6, 389–394,Short summary
This paper focuses on a novel carbon fibre sensor technology that exploits the low-cost and low-energy electrical reflectometry method for a spatially resolved strain measurement. The application of artificial neural networks for mapping the measured electrical signal to the existing strain profile is demonstrated. The potential and current limits are highlighted. The sensor is a promising part for the next generation of light-weight structures with operando health monitoring systems.
Alexander Utz, Christian Walk, Norbert Haas, Tatjana Fedtschenko, Alexander Stanitzki, Mir Mokhtari, Michael Görtz, Michael Kraft, and Rainer Kokozinski
J. Sens. Sens. Syst., 6, 285–301,
Alberto Garinei and Roberto Marsili
J. Sens. Sens. Syst., 6, 253–258,Short summary
When a torque measurement is required, torque transducers show many drawbacks during their use: the usual limits are the need for contact and the effects on shaft line parameters. A new approach is proposed in this work: a non-contact torque meter for a machine shaft has been developed, based on a laser speckle contrast method. It carries out torque measurements evaluating the torsional displacement between two distinct sections of the shaft, through the monitoring of their roughness.
Manuel Schneider, Alexander Jahn, Norbert Greifzu, and Norbert Fränzel
J. Sens. Sens. Syst., 6, 199–210,Short summary
This article describes a chopper amplifier which has been specially developed for piezoelectric pressure sensors. It is shown that the amplifier provides good results for pressure measurement in injection moulds. A special feature of this work is the signal optimisation through the use of a Kalman filter.
Peter Haußmann and Joachim Melbert
J. Sens. Sens. Syst., 6, 65–76,Short summary
A method to generate broadband waveforms with low peak-to-peak amplitude based on distinct frequency domain profiles is presented, which includes random phase variation and numerical optimization. The peak-to-peak amplitude can be reduced by 71 % compared to zero-phase pulses with equal frequency domain characteristics. Used as excitation signals for impedance spectroscopy, the waveforms yield good results at significantly reduced measurement duration compared to established measurement methods.
Patrick Weßkamp and Joachim Melbert
J. Sens. Sens. Syst., 5, 389–400,Short summary
Measurement of electrical current is important for many scientific and industrial applications. Often shunt resistors are used. However, thermal effects due to self-heating and ambient temperature variation limit the achievable accuracy. In this work, a dynamic compensation method is presented which takes static and dynamic temperature drift effects into account. It significantly reduces the remaining measurement errors. The approach can also be used to improve existing measurement systems.
Roland Wuchrer, Sabrina Amrehn, Luhao Liu, Thorsten Wagner, and Thomas Härtling
J. Sens. Sens. Syst., 5, 157–163,Short summary
The continuous monitoring of industrial and environmental processes is becoming an increasingly important aspect with both economic and societal impact. To realize this task, spectral-optical sensors with their outstanding properties in terms of sensitivity and reliability are a potential solution. However, for exploiting these sensors in a cost- and energy-efficient sensing system, a miniaturized readout unit is needed. Here we present a card-size, inexpensive, and robust readout electronics.
Johannes Gürtler, Daniel Haufe, Anita Schulz, Friedrich Bake, Lars Enghardt, Jürgen Czarske, and Andreas Fischer
J. Sens. Sens. Syst., 5, 125–136,Short summary
The interaction of sound and flow enables an efficient noise damping. Understanding this aeroacoustic damping phenomenon requires simultaneous measurement of flow and sound fields. Using a high-speed CMOS camera, two-component flow velocity measurements are performed in a three-dimensional region of interest. The sensor system can simultaneously capture sound and turbulent flow velocity oscillations. The presented measurements reveal that the sound energy is transferred into flow energy.
A. Tempelhahn, H. Budzier, V. Krause, and G. Gerlach
J. Sens. Sens. Syst., 5, 9–16,Short summary
Infrared cameras based on microbolometer focal plane arrays (FPAs) are the most widely used cameras in thermography. For acceptable measurement uncertainty values, the disturbing influences of changing ambient temperature have to be considered. We propose a TEC-less and shutter-less correction approach based on additional temperature measurements inside the IR camera. The effects on the pixel responsivity and offset voltage are considered separately.
M. Schüler, T. Sauerwald, and A. Schütze
J. Sens. Sens. Syst., 4, 305–311,Short summary
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.
A. Dragoneas, L. Hague, and M. Grell
J. Sens. Sens. Syst., 4, 169–177,
A. Ens and L. M. Reindl
J. Sens. Sens. Syst., 4, 9–16,
M. Schüler, T. Sauerwald, and A. Schütze
J. Sens. Sens. Syst., 3, 213–221,
Y. Wang, D. Ewert, T. Meisen, D. Schilberg, and S. Jeschke
J. Sens. Sens. Syst., 3, 113–120,
D. Griefahn, J. Wollnack, and W. Hintze
J. Sens. Sens. Syst., 3, 105–111,
J.-M. Boccard, P. Katus, R. Renevier, L. M. Reindl, and J.-M. Friedt
J. Sens. Sens. Syst., 2, 147–156,
H. Lühr, F. Yin, and R. Bock
J. Sens. Sens. Syst., 2, 9–17,
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Measurement tasks of modern micro- and nanometrology with decreasing structure sizes and rising aspect ratios require nanometre-resolving 3-D capable sensors. A 3-D probing system based on electrical interaction is presented which is operated on a nanopositioning system NMM-1. New 3-D measurement procedures for the probing system as well as for micrometrology measurement tasks in general are shown.
Measurement tasks of modern micro- and nanometrology with decreasing structure sizes and rising...