@article{MonkmanSindersbergerPrem, author = {Monkman, Gareth J. and Sindersberger, Dirk and Prem, Nina}, title = {Magnetically enhanced photoconductive high voltage control}, series = {ISSS Journal of Micro and Smart Systems}, volume = {11}, journal = {ISSS Journal of Micro and Smart Systems}, publisher = {Springer Nature}, doi = {10.1007/s41683-021-00088-z}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-30606}, pages = {317 -- 328}, abstract = {The recent surge of interest in electrostatic actuators, particularly for soft robotic applications, has placed increasing demands on high voltage control technology. In this respect, optoelectronic bidirectional switching and analogue regulation of high voltages is becoming increasingly important. One common problem is the leakage current due to dark resistance of the material or device used. Another is the physical size of such elements. However, their ability to provide galvanic separation makes them a very attractive alternative to conventional (wired) semiconductor elements. This paper gives an overview of available methods and devices before introducing a concept based on the combination of photoresistive and magnetoresistive effects in Gallium Arsenide that are potentially applicable to other semiconductor materials.}, language = {en} } @article{MonkmanStrieglPremetal., author = {Monkman, Gareth J. and Striegl, Birgit and Prem, Nina and Sindersberger, Dirk}, title = {Electrical Properties of Magnetoactive Boron-Organo-Silicon Oxide Polymers}, series = {Macromolecular Chemistry and Physics}, volume = {221}, journal = {Macromolecular Chemistry and Physics}, number = {4}, publisher = {Wiley}, doi = {10.1002/macp.201900342}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-26488}, pages = {1 -- 8}, abstract = {The electrical properties of rheopectic magnetoactive composites comprising boron-organo-silicon oxide dielectric matrices containing carbonyl iron microparticles are presented for the first time. The increase in interfacial magnetocapacitance is seen to greatly exceed that experienced when using conventional elastomeric matrices such as polydimethylsiloxane. In addition to the increase in capacitance, a simultaneous and sharp decrease in the parallel electrical resistance over several orders of magnitude is also observed. The effects are time dependent but repeatable. Potential applications include magnetically controlled frequency dependent devices, magnetic sensor systems, weighting elements for neural networks, etc.}, language = {en} } @article{PremSindersbergerMonkman, author = {Prem, Nina and Sindersberger, Dirk and Monkman, Gareth J.}, title = {Infrared spectral analysis of low concentration magnetoactive polymers}, series = {Journal of Applied Polymer Science}, volume = {137}, journal = {Journal of Applied Polymer Science}, number = {7}, publisher = {Wiley}, organization = {WILEY}, issn = {1097-4628}, doi = {10.1002/app.48366}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-25913}, pages = {1 -- 7}, abstract = {This work concerns an area of magnetoactive polymer (MAP) research seldom considered. Traditionally only MAP with high concentrations of magnetic filler (typically between 10 and 90 wt\%) have been investigated. This article deals with a hitherto neglected aspect of research, namely MAP containing lower magnetic filler concentrations (1 to 3 wt\%). This article utilizes a range of spectroscopic analysis methods (Raman and FTIR) and their applicability to MAP characterization at wavelengths ranging from 2.5 to 25 mu m. Particular attention is paid to low carbonyl iron particle (CIP) concentrations in MAP for which the emergence of capillary doublets at a critical 2 wt\% concentration is revealed. This results in measurable magnetic field-dependent changes in IR absorption at a wavelength of 4.255 mu m together with a detectable CO2 susceptibility. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48366.}, language = {en} } @incollection{MonkmanBoeseErmertetal., author = {Monkman, Gareth J. and B{\"o}se, Holger and Ermert, Helmut and Klein, Dagmar and Freimuth, Herbert and Baumann, M{\´i}chael and Egersd{\"o}rfer, Stefan and Bruhns, Otto T. and Meier, Alexander and Raja, Kashif}, title = {Technologies for Haptic Systems in Telemedicine}, series = {Integration of Health Telematics into Medical Practice}, booktitle = {Integration of Health Telematics into Medical Practice}, editor = {Nerlich, Michael and Sch{\"a}chinger, Ulrich}, publisher = {IOS Press}, doi = {10.3233/978-1-60750-941-7-83}, pages = {83 -- 93}, abstract = {The ability to image the elastic properties of tissue is potentially useful in a variety of applications. The field of elastic imaging has grown in response to the Potential use of such information in medical diagnosis. Real time ultrasound elastography represents a recent development in determining strain and elasticity distributions. Nevertheless, commonly used imaging techniques rely on the interpretation of two dimensional visual data displayed on a video screen. In reality however, physicians often prefer tactile exploration making the simultaneous portrayal of both video and haptic information most desirable. Since the 1970's many alphanumeric to tactile data conversion methods have been investigated, mainly with the ultimate aim of assisting the blind. More recently, interest has been directed toward the display of pictures on haptically explorable surfaces - Tactile imaging. Such a system would allow surgeons to examine hard sectors contained within soft tissue, and thereby assist in operations held remotely. The expansion of ultrasound elastography to 3D formats would mean the ability to haptically explore regions of the body normally inaccessible to human hands. For three-dimensional imaging the acquisition of sequential tomographic slices using Elastography, combined with image segmentation, enables the reconstruction, quantification and visualisation of tumour volumes. In a collaborative project between four research Institutes, the aim is to produce a prototype three dimensional tactile displays comprising electrically switchable micromachined cells, whose mechanical moduli are governed by phase changes experienced by electrorheological and/or magnetorheological fluids. This will be integrated with a sensory ultrasonic elastography in order to present the human fingers with controllable surfaces capable of emulating biological tissue, muscle and bone.}, language = {en} } @article{BoeseBaumannMonkmanetal., author = {B{\"o}se, Holger and Baumann, Michael and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Tunayar, A. and Freimuth, Herbert and Ermert, Helmut and Khaled, W.}, title = {A new ER fluid based haptic actuator system for virtual reality}, series = {International journal of modern physics / B Condensed matter physics, statistical physics}, volume = {19}, journal = {International journal of modern physics / B Condensed matter physics, statistical physics}, number = {7-9}, publisher = {World Scientific Publ.}, doi = {10.1142/9789812702197_0129 [Titel anhand dieser DOI in Citavi-Projekt {\"u}bernehmen]}, pages = {1628 -- 1634}, abstract = {The concept and some steps in the development of a new actuator system which enables the haptic perception of mechanically inhomogeneous virtual objects are introduced. The system consists of a two-dimensional planar array of actuator elements containing an electrorheological (ER) fluid. When a user presses his fingers onto the surface of the actuator array, he perceives locally variable resistance forces generated by vertical pistons which slide in the ER fluid through the gaps between electrode pairs. The voltage in each actuator element can be individually controlled by a novel sophisticated switching technology based on optoelectric gallium arsenide elements. The haptic information which is represented at the actuator array can be transferred from a corresponding sensor system based on ultrasonic elastography. The combined sensor-actuator system may serve as a technology platform for various applications in virtual reality, like telemedicine where the information on the consistency of tissue of a real patient is detected by the sensor part and recorded by the actuator part at a remote location.}, language = {en} } @article{MonkmanEgersdoerferMeieretal., author = {Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Meier, Alexander and B{\"o}se, Holger and Baumann, Michael and Ermert, Helmut and Kahled, W. and Freimuth, Herbert}, title = {Technologies for Haptic Displays in Teleoperation}, series = {Industrial Robot}, volume = {30}, journal = {Industrial Robot}, number = {6}, publisher = {Emerald}, issn = {0143-991x}, doi = {10.1108/01439910310506792}, pages = {525 -- 530}, abstract = {Since the 1960s many alphanumeric to tactile data conversion methods have been investigated, mainly with the ultimate aim of assisting the blind. More recently, interest has been directed toward the display of pictures on haptically explorable surfaces - tactile imaging - for a range of medical, remote sensing and entertainment purposes. This paper examines the technologies which have been utilised for haptically explorable tactile displays over the past three decades, focussing on those which appear commercially viable in the immediate future.}, language = {en} } @article{BoeseMonkmanFreimuthetal., author = {B{\"o}se, Holger and Monkman, Gareth J. and Freimuth, Herbert and Tunayar, A. and Khaled, W. and Baumann, Michael and Egersd{\"o}rfer, Stefan and Ermert, Helmut}, title = {A new haptic sensor-actuator system based on electrorheological fluids}, series = {Actuator 2004 : 9th International Conference on New Actuators \& 3rd International Exhibition on Smart Actuators and Drive Systems ; Bremen, Germany, 14 - 16 June 2004}, journal = {Actuator 2004 : 9th International Conference on New Actuators \& 3rd International Exhibition on Smart Actuators and Drive Systems ; Bremen, Germany, 14 - 16 June 2004}, publisher = {HVG Hanseatische Veranstaltungs-GmbH}, address = {Bremen}, language = {en} } @inproceedings{BoeseMonkmanFreimuthetal., author = {B{\"o}se, Holger and Monkman, Gareth J. and Freimuth, Herbert and Tunayar, A. and Ermert, Helmut and Khaled, W. and Baumann, Michael and Egersd{\"o}rfer, Stefan}, title = {A new ER fluid based haptic actuator system for virtual reality}, series = {Proceedings of the Ninth International Conference Electrorheological Fluids and Magnetorheological Suspensions (ERMR 2004) : Beijing, China, 29 August - 3 September 2004}, booktitle = {Proceedings of the Ninth International Conference Electrorheological Fluids and Magnetorheological Suspensions (ERMR 2004) : Beijing, China, 29 August - 3 September 2004}, publisher = {World Scientific}, address = {Singapore}, pages = {889 -- 895}, language = {en} } @inproceedings{TunayarKleinFreimuthetal., author = {Tunayar, A. and Klein, Dagmar and Freimuth, Herbert and B{\"o}se, Holger and Baumann, Michael and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Ermert, Helmut and Khaled, W.}, title = {A tactile array based on electrorheological fluids}, series = {Actuator 2004 : 9th International Conference on New Actuators \& 3rd International Exhibition on Smart Actuators and Drive Systems, 14-16 June 2004, Bremen, Germany}, booktitle = {Actuator 2004 : 9th International Conference on New Actuators \& 3rd International Exhibition on Smart Actuators and Drive Systems, 14-16 June 2004, Bremen, Germany}, publisher = {HVG Hanseatische Veranstaltungs-GmbH}, address = {Bremen}, pages = {601 -- 604}, language = {en} } @inproceedings{BoeseErmertTunayaretal., author = {B{\"o}se, Holger and Ermert, Helmut and Tunayar, A. and Monkman, Gareth J. and Baumann, Michael and Kahled, W. and Reichling, S. and Bruhns, Otto T. and Freimuth, Herbert and Egersd{\"o}rfer, Stefan}, title = {A novel haptic sensor-actuator system for virtual reality}, series = {Eurohaptics 2004, Munich, Germany, June 5 - 7, 2004 Proceedings of the 4th International Conference EuroHaptics 2004 ; June 5 - 7, 2004, M{\"u}nchen, Germany}, booktitle = {Eurohaptics 2004, Munich, Germany, June 5 - 7, 2004 Proceedings of the 4th International Conference EuroHaptics 2004 ; June 5 - 7, 2004, M{\"u}nchen, Germany}, publisher = {Inst. of Automatic Control Engineering}, address = {M{\"u}nchen}, isbn = {3-9809614-0-0}, language = {en} } @inproceedings{BoeseErmertTunayaretal., author = {B{\"o}se, Holger and Ermert, Helmut and Tunayar, A. and Monkman, Gareth J. and Baumann, Michael and Kahled, W. and Reichling, S. and Bruhns, Otto T. and Freimuth, Herbert and Egersd{\"o}rfer, Stefan}, title = {A Novel Haptic Sensor-Actuator System for Applications in Virtual Reality}, series = {BMBF-Tagung, Leipzig 19.10 February 2004}, booktitle = {BMBF-Tagung, Leipzig 19.10 February 2004}, language = {en} } @inproceedings{BoeseMonkmanFreimuthetal., author = {B{\"o}se, Holger and Monkman, Gareth J. and Freimuth, Herbert and Klein, Dagmar and Ermert, Helmut and Baumann, Michael and Egersd{\"o}rfer, Stefan and Bruhns, Otto T.}, title = {ER Fluid Based Haptic System for Virtual Reality}, series = {Actuator 2002 : 8th International Conference on New Actuators \& 2nd International Exhibition on Smart Actuators and Drive Systems ; Bremen, Germany, 10 - 12 June 2002}, booktitle = {Actuator 2002 : 8th International Conference on New Actuators \& 2nd International Exhibition on Smart Actuators and Drive Systems ; Bremen, Germany, 10 - 12 June 2002}, edition = {CD-ROM}, pages = {351 -- 354}, language = {en} } @inproceedings{KhaledBruhnsReichlingetal., author = {Khaled, W. and Bruhns, Otto T. and Reichling, S. and B{\"o}se, Holger and Baumann, Michael and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Meier, Alexander and Klein, Dagmar and Freimuth, Herbert and Ermert, Helmut}, title = {A haptic system for virtual reality applications based on ultrasound elastography and electrorheological fluids}, series = {Acoustical Imaging (ACIM)}, volume = {27}, booktitle = {Acoustical Imaging (ACIM)}, publisher = {Springer}, address = {Dordrecht}, isbn = {978-90-481-6652-7}, issn = {0270-5117}, doi = {10.1007/978-1-4020-2402-3_85}, pages = {667 -- 674}, abstract = {Mechanical properties of biological tissue represent important diagnostic information and are of histological and pathological relevance. Malignant tumors are significantly stiffer and more immobile than surrounding healthy tissue. Hard calcifications in vessels occur due to arteriosclerosis. The problem is, that such information is usually not available or can only be obtained by manual palpation, which is subjective and limited in sensitivity. It requires intuitive assessment and does not allow quantitative documentation. Unfortunately, none of the established medical imaging equipment such as magnetic resonance imaging (MRI) or X-ray computed tomography (CT) can provide direct measure of tissue elasticity. On the one hand a suitable sensor is required for quantitative measurement of mechanical tissue properties. On the other hand there is also some need for a realistic haptic display of such tissue properties. Suitable actuator arrays with high spatial resolution acting in real time are required. A haptic sensor actuator system is presented in this paper including a sensitive sensor part and an actuator array for different applications. The mechanical consistency of an object is to be locally specified using a sensor system and represented perceptibly in a remote position on an actuator system for the user. The sensor system uses ultrasound (US) elastography, whereas the actuator array is based on electrorheological (ER) fluids.}, language = {en} } @inproceedings{KhaledBruhnsReichlingetal., author = {Khaled, W. and Bruhns, Otto T. and Reichling, S. and B{\"o}se, Holger and Baumann, Michael and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Meier, Alexander and Klein, Dagmar and Freimuth, Herbert and Ermert, Helmut}, title = {A haptic sensor-actuator-system based on ultrasound elastography and electrorheological fluids for virtual reality applications in medicine}, series = {CARS 2003 : computer assisted radiology and surgery ; proceedings of the 17th International Congress and Exhibition London, June 25 - 28, 2003}, booktitle = {CARS 2003 : computer assisted radiology and surgery ; proceedings of the 17th International Congress and Exhibition London, June 25 - 28, 2003}, publisher = {Elsevier}, address = {Amsterdam}, pages = {1354}, abstract = {Mechanical properties of biological tissue represent important diagnostic information and are of histological relevance (hard lesions, "nodes" in organs: tumors; calcifications in vessels: arteriosclerosis). The problem is, that such information is usually obtained by digital palpation only, which is limited with respect to sensitivity. It requires intuitive assessment and does not allow quantitative documentation. A suitable sensor is required for quantitative detection of mechanical tissue properties. On the other hand, there is also some need for a realistic mechanical display of those tissue properties. Suitable actuator arrays with high spatial resolution and real-time capabilities are required operating in a haptic sensor actuator system with different applications. The sensor system uses real time ultrasonic elastography whereas the tactile actuator is based on electrorheological fluids. Due to their small size the actuator array elements have to be manufactured by micro-mechanical production methods. In order to supply the actuator elements with individual high voltages a sophisticated switching and control concept have been designed. This haptic system has the potential of inducing real time substantial forces, using a compact lightweight mechanism which can be applied to numerous areas including intraoperative navigation, telemedicine, teaching, space and telecommunication.}, language = {en} } @inproceedings{KhaledReichlingBruhnsetal., author = {Khaled, W. and Reichling, S. and Bruhns, Otto T. and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Baumann, Michael and B{\"o}se, Holger and Klein, Dagmar and Freimuth, Herbert and Tunayar, A. and Lorenz, A. and Pessavento, A. and Ermert, Helmut}, title = {Palpation imaging using a haptic system for virtual reality applications in medicine}, series = {Perspective in image-guided surgery : proceedings of the Scientific Workshop on Medical Robotics, Navigation, and Visualization : RheinAhrCampus Remagen, Germany, 11-12 March}, booktitle = {Perspective in image-guided surgery : proceedings of the Scientific Workshop on Medical Robotics, Navigation, and Visualization : RheinAhrCampus Remagen, Germany, 11-12 March}, publisher = {World Scientific Publ.}, address = {Singapore}, pages = {407 -- 414}, language = {en} } @inproceedings{KhaledReichlingBruhnsetal., author = {Khaled, W. and Reichling, S. and Bruhns, Otto T. and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Baumann, Michael and B{\"o}se, Holger and Klein, Dagmar and Freimuth, Herbert and Tunayar, A. and Lorenz, A. and Pessavento, A. and Ermert, Helmut}, title = {Palpation Imaging using a Haptic System for Virtual Reality Applications in Medicine}, series = {Proceedings of the 12th Annual Medicine Meets Virtual Reality Conference: - Building a Better You: The Next Tools for Medical Education, Diagnosis, and Care. - Medicine Meets Virtual Reality (MMVR) - Newport Beach (California, USA). 2004}, booktitle = {Proceedings of the 12th Annual Medicine Meets Virtual Reality Conference: - Building a Better You: The Next Tools for Medical Education, Diagnosis, and Care. - Medicine Meets Virtual Reality (MMVR) - Newport Beach (California, USA). 2004}, language = {en} } @inproceedings{KhaledBruhnsReichlingetal., author = {Khaled, W. and Bruhns, Otto T. and Reichling, S. and B{\"o}se, Holger and Baumann, Michael and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Meier, Alexander and Freimuth, Herbert and Tunayar, A. and Ermert, Helmut}, title = {A New Haptic Sensor Actuator System for Virtual Reality Applications in Medicine}, series = {Medical Image Computing and Computer-Assisted Intervention - MICCAI 2003: 6th International Conference, Montr{\´e}al, Canada, November 15-18, 2003, Proceedings}, booktitle = {Medical Image Computing and Computer-Assisted Intervention - MICCAI 2003: 6th International Conference, Montr{\´e}al, Canada, November 15-18, 2003, Proceedings}, publisher = {Springer}, isbn = {978-3540204626}, pages = {132 -- 140}, language = {en} } @article{KhaledBruhnsReichlingetal., author = {Khaled, W. and Bruhns, Otto T. and Reichling, S. and B{\"o}se, Holger and Baumann, Michael and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Meier, Alexander and Klein, Dagmar and Freimuth, Herbert and Ermert, Helmut}, title = {A haptic system for virtual reality applications based on ultrasound elastography and electrorheological fluids}, series = {Acoustical Imaging}, journal = {Acoustical Imaging}, number = {27}, publisher = {Kluver Academic}, address = {Dordrecht \& New York}, doi = {10.1007/978-1-4020-2402-3_85}, pages = {667 -- 675}, language = {en} } @inproceedings{KhaledReichlingBruhnsetal., author = {Khaled, W. and Reichling, S. and Bruhns, Otto T. and Ermert, Helmut and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Baumann, Michael and B{\"o}se, Holger and Freimuth, Herbert and Tunayar, A.}, title = {Palpation imaging using a haptic sensor actuator system for medical applications}, series = {Actuator 2004 : 9th International Conference on New Actuators \& 3rd International Exhibition on Smart Actuators and Drive Systems, 14-16 June 2004, Bremen, Germany}, booktitle = {Actuator 2004 : 9th International Conference on New Actuators \& 3rd International Exhibition on Smart Actuators and Drive Systems, 14-16 June 2004, Bremen, Germany}, publisher = {HVG Hanseatische Veranstaltungs-GmbH}, address = {Bremen}, pages = {379 -- 382}, language = {en} } @misc{PremSindersbergerMonkman, author = {Prem, Nina and Sindersberger, Dirk and Monkman, Gareth J.}, title = {Spectroscopic Analysis of Magneto-Active Polymers (MAP) - Poster}, series = {DFG-Tagung, Benediktbeuern, September 2017}, journal = {DFG-Tagung, Benediktbeuern, September 2017}, language = {en} }