Romol Chadda

Romol Chadda
Technische Universität Darmstadt | TU · Department of Electrical Engineering and Information Technology (Dept.18)

Master of Science

About

16
Publications
5,335
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33
Citations

Publications

Publications (16)
Article
Laser-based powder bed fusion as an additive manufacturing process allows the integration of sensors at any location within the manufactured part. This allows for manufacturing smart parts that can be integrated into complex structures for monitoring applications, as they can perform in-situ measurements. Especially, monitoring of force and torque...
Conference Paper
Bite force is an important characteristic of the masticatory systems functional state. Especially force asymmetries are potential indicators for malfunctions such as temporo-mandibular disorders or dysgnathia. By measuring bilaterally, i.e. simultaneously on the left and right side, it is possible to quantify asymmetries. Currently, there is a lack...
Conference Paper
Um den Menschen bedarfsgerecht und ergonomisch unterstützen zu können, müssen Assistenzsysteme die Bewegungen und Bewegungsabsichten des Nutzers frühzeitig erkennen. Die Individualität der menschlichen Bewegung ist dabei eine besondere Herausforderung. Dieser Beitrag zeigt, dass maschinelles Lernen geeignet ist, um aus den Daten ausgewählter, am Kö...
Article
Full-text available
Purpose Electromagnetic tracking (EMT) can partially replace X-ray guidance in minimally invasive procedures, reducing radiation in the OR. However, in this hybrid setting, EMT is disturbed by metallic distortion caused by the X-ray device. We plan to make hybrid navigation clinical reality to reduce radiation exposure for patients and surgeons, by...
Preprint
Full-text available
Purpose: Electromagnetic Tracking (EMT) can partially replace X-ray guidance in minimally invasive procedures, reducing radiation in the OR. However, in this hybrid setting, EMT is disturbed by metallic distortion caused by the X-ray device. We plan to make hybrid navigation clinical reality to reduce radiation exposure for patients and surgeons, b...
Chapter
We present a disruptive method for manufacturing structure-integrated force sensors based on the LPBF process by inserting a strain sensing steel plate in the additive manufacturing process of the deformation element. In order to investigate the strain transmission from the printed part to the integrated steel plate, we built two prototypes which d...
Conference Paper
We present a 15 N nominal force sensor, manufactured with a disruptive method based on laser-based powder-bed-fusion. This additive manufacturing process enables the application-specific realization of a deformation element for a structural integrated sensor for condition monitoring applications. Manufacturing of the deformation element is done by...
Chapter
Full-text available
We present a wearable vibrotactile feedback device consisting of four linear resonant actuators (LRAs) that are able to generate virtual stimuli, known as phantom tactile sensation, for human-robot interaction. Using an energy model, we can control the location and intensity of the virtual stimuli independently. The device consists of mostly 3D-pri...
Article
Advanced acoustic levitation devices featuring flexible, lightweight, wide bandwidth, and film-like transducers based on ferroelectrets are designed and fabricated for sophisticated manipulation of particles in a simple way. Owing to the unique properties of ferroelectret films, such as high piezoelectric activity, very small acoustic impedance, a...
Article
Advanced acoustic levitation devices featuring flexible, lightweight, wide bandwidth, and film-like transducers based on ferroelectrets are designed and fabricated for sophisticated manipulation of particles in a simple way. Owing to the unique properties of ferroelectret films, such as high piezoelectric activity, very small acoustic impedance, a...
Conference Paper
Full-text available
We present a 10 N nominal needle tip force sensor based on silicon-based semiconductor strain gauges that can be used in brachytherapy or biopsies. As deformation body the guiding rod of such a surgical needle with a diameter of 1.2 mm is used. In a thinned area, near the tip of the needle, the strain gauge, as sensing element, is applied with a fl...
Conference Paper
Full-text available
For quality control and functionality testing, Contact Normal Forces F N need to be measured in multi contact point connectors like MCON 8 with the least mating cycles possible. This article is about the design and the characterization of a 4-channel gage. Each channel gage consists of a metal transducer with a metal foil strain gage. The forces ra...
Conference Paper
Full-text available
Continuum robots are inspired by biological trunks, snakes and tentacles. Unlike conventional robot manipulators, there are no rigid structures or joints. Advantageous is the ease of miniaturization combined with high dexterity, since limiting components such as bearings or gears can be omitted. Most currently used actuation elements in continuum r...
Article
Full-text available
In minimally invasive surgery, new flexible instruments enable safer and easier access to difficult-to-reach anatomical regions. However, their introduction into the clinical workflow requires robust replanning, because navigation errors during surgery render initially planned trajectories infeasible. Such replanning requires to regularly solve an...
Conference Paper
Full-text available
Zusammenfassung: Formgedächtnislegierungen (FGLen) werden bereits in verschiedensten Anwendungen in der Medizin eingesetzt. Hierzu zählen unter anderem medizinische Implantate, wie zum Beispiel Stents (Gefäßstützen) und orthodontische Drähte, die von der superelastischen Eigenschaft von Nickel-Titan Gebrauch machen. Darüber hinaus existiert jedoch...

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