scholarly journals Design, optimization, calibration, and a case study of a 3D-printed, low-cost fingertip sensor for robotic manipulation

2014 ◽  
Author(s):  
Zhe Xu ◽  
Svetoslav Kolev ◽  
Emanuel Todorov
Keyword(s):  
Design Optimization ◽  
Low Cost ◽  
Robotic Manipulation ◽  
3D Printed

The Sparthan Three-Dimensional Printed Exo-Glove: A Preliminary Evaluation of Performance Via Case Study

2019 ◽  
Vol 13 (3) ◽  
Author(s):  
Tomás A. Georgiou ◽  
Davide Asnaghi ◽  
Alva Liang ◽  
Alice M. Agogino
Keyword(s):  
Light Intensity ◽  
Daily Living ◽  
Low Cost ◽  
Three Dimensional ◽  
Preliminary Evaluation ◽  
Evaluation Of Performance ◽  
3D Printed ◽  
Hand Exoskeleton ◽  
And Performance

This paper describes the development and testing of a low-cost three-dimensional (3D) printed wearable hand exoskeleton to assist people with limited finger mobility and grip strength. The function of the presented orthosis is to support and enable light intensity activities of daily living and improve the ability to grasp and hold objects. The Sparthan Exoskeleton prototype utilizes a cable-driven design applied to individual digits with motors. The initial prototype is presented in this paper along with a preliminary evaluation of durability and performance efficacy.

A Case Study in 3D Printed Porous Ceramics: Infant Incubator Humidification System

2012 ◽  
Author(s):  
Olaf Diegel ◽  
Andrew Withell ◽  
Deon Debeer ◽  
Mark Wu
Keyword(s):  
Material Properties ◽  
Low Cost ◽  
Ceramic Materials ◽  
Porous Ceramics ◽  
Burn Out ◽  
Infant Incubator ◽  
3D Printers ◽  
3D Printed ◽  
Factorial Design Experiment

This paper describes research in adapting 3D printers to operate with low-cost ceramic materials. The components produced with these clay-based ceramic powders can be fired to produce strong, complex and lightweight ceramic parts. The final material properties, including the porosity of the parts, can be controlled through the part design and, potentially, through additives to the material that burn out during firing. The paper begins with a brief description of the 3D printing process and how it can be used with clay powders. It then introduces a factorial design experiment initiated to explore the effect of ingredient and parameter variations on the dimensional stability and material properties of green and fired ceramic parts. It then presents a case study in which 3D printed ceramic parts are used in the humidification system for an infant incubator for developing countries.

scholarly journals 3D Printed Lab-on-a-Chip Platform for Chemical Stimulation and Parallel Analysis of Ion Channel Function

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 548 ◽  
Author(s):  
Daniel Aschenbrenner ◽  
Oliver Friedrich ◽  
Daniel F. Gilbert
Keyword(s):  
Ion Channels ◽  
Ion Channel ◽  
Low Cost ◽  
Lab On A Chip ◽  
Chemical Stimulation ◽  
Hek293 Cells ◽  
Solution Exchange ◽  
3D Printed

Functional imaging has been a widely established method for the assessment of ion channel function in vitro. Conventional infrastructure used for in vitro functional analysis of ion channels is typically proprietary, non-customizable, expensive, and requires a high level of skill to use and maintain. 3D desktop printing, which is employed in the rapid prototyping field, allows for quick engineering of alternatives to conventional imaging infrastructure that are customizable, low cost, and user friendly. Here, we describe an ultra-low-cost microfluidic lab-on-a-chip (LOC) device manufactured using acrylonitrile butadiene styrene (ABS) for in vitro functional imaging of ion channels that can quickly and easily be reconstructed using three-dimensional (3D) desktop printing. The device is light weight (<5 g), small (20 mm × 49 mm), and extremely low cost (<EUR 1). We simulate fluidics within the printed channels and assess the suitability of the engineered chamber to generate homogeneous mixtures during solution exchange. We demonstrate the usability of the 3D printed microfluidic device in a case study using Fluo-4-loaded human embryonal kidney-derived (HEK293) cells, recombinantly expressing the capsaicin receptor, transient receptor potential vanilloid receptor type 1 (TRPV1), as a model system. In the case study, we confirm its applicability to solution exchange for chemical stimulation and parallel functional time-lapse fluorescence microscopy-based calcium imaging. We assess the suitability of ABS for culturing HEK293 cells inside the microfluidic LOC, based on qualitative analysis of microscopic transmission light images of ABS-exposed HEK293 cells and confirm the previously reported biocompatibility of ABS. To highlight the versatility of the 3D printed microfluidic device, we provide an example for multiplication of the shown concept within a 3D printed multichannel microfluidic LOC to be used, for example, in a higher throughput format for parallelized functional analysis of ion channels. While this work focusses on Ca2+ imaging with TRPV1 channels, the device may also be useful for application with other ion channel types and in vitro models.

A method for computerized olfactory assessment and training outside of laboratory or clinical settings

2020 ◽  
Author(s):  
Simon Niedenthal ◽  
Johannes Nilsson ◽  
Maria Larsson ◽  
Jonas Olofsson
Keyword(s):  
Low Cost ◽  
Rfid Tags ◽  
Clinical Settings ◽  
Proof Of Concept ◽  
Olfactory Loss ◽  
Care Facilities ◽  
Adaptive Challenges ◽  
3D Printed ◽  
And Training

There are currently few ways to reliably and objectively assess olfaction outside of the research laboratory or clinic. Smell training is a promising method for olfactory rehabilitation at home, but further methodological advances might enhance itseffectiveness and range of use. Here we present Exerscent, a portable, low-cost olfactory display designed primarily for uses outside of the laboratory and that can be operated witha personal computer. Exerscent includes RFID tags that are attached to odor stimuli using a sensor box that encodes the odor in order to provide adaptive challenges for the user(e.g. an odor identification task). Hardware parts are commercially available or 3D printed. Instructions and code for building the Exerscent is freely available online(https://osf.io/kwftm/). As a proof of concept, we present a case study in which a participant trained daily to identify 54 odors, improving from 81% to 96% accuracy over 16 consecutive days. Exerscent may be primarily used for olfactory skills development (e.g. perfumery, enology), and rehabilitation purposes (e.g. postviral olfactory loss), butit also allows for other forms of technological interactions such as olfactory-based recreational interactions. We discuss how Exerscent and similar methods might enablewidespread, networked olfactory research in a variety of settings, including homes, elder care facilities and schools.

Low Temperature Fault Isolation Using Soft Defect Localization

2012 ◽  
Author(s):  
Kristopher D. Staller
Keyword(s):  
Low Temperatures ◽  
Laser Scanning ◽  
Low Cost ◽  
Fault Isolation ◽  
Laser Scanning Microscopy ◽  
Cold Temperature ◽  
Multiple Point ◽  
Defect Localization ◽  
Low Levels

Abstract Cold temperature failures are often difficult to resolve, especially those at extreme low levels (&lt; -40°C). Momentary application of chill spray can confirm the failure mode, but is impractical during photoemission microscopy (PEM), laser scanning microscopy (LSM), and multiple point microprobing. This paper will examine relatively low-cost cold temperature systems that can hold samples at steady state extreme low temperatures and describe a case study where a cold temperature stage was combined with LSM soft defect localization (SDL) to rapidly identify the cause of a complex cold temperature failure mechanism.

Pioneering Low-Cost 3D-Printed Transtibial Prosthetics to Serve a Rural Population in Sierra Leone

2020 ◽  
Author(s):  
Merel van der Stelt ◽  
Martin P. Grobusch ◽  
Abdul R. Koroma ◽  
Marco Papenburg ◽  
Ismaila Kebbie ◽  
...  
Keyword(s):  
Sierra Leone ◽  
Rural Population ◽  
Low Cost ◽  
3D Printed

scholarly journals Hybrid Seven-bar Press Mechanism

2018 ◽  
Vol 12 (3) ◽  
pp. 181-187
Author(s):  
M. Erkan Kütük ◽  
L. Canan Dülger
Keyword(s):  
Genetic Algorithm ◽  
Objective Function ◽  
Design Optimization ◽  
Hybrid System ◽  
Degrees Of Freedom ◽  
Dimensional Synthesis ◽  
Design Variables ◽  
Optimization Study ◽  
Metal Stamping

An optimization study with kinetostatic analysis is performed on hybrid seven-bar press mechanism. This study is based on previous studies performed on planar hybrid seven-bar linkage. Dimensional synthesis is performed, and optimum link lengths for the mechanism are found. Optimization study is performed by using genetic algorithm (GA). Genetic Algorithm Toolbox is used with Optimization Toolbox in MATLAB®. The design variables and the constraints are used during design optimization. The objective function is determined and eight precision points are used. A seven-bar linkage system with two degrees of freedom is chosen as an example. Metal stamping operation with a dwell is taken as the case study. Having completed optimization, the kinetostatic analysis is performed. All forces on the links and the crank torques are calculated on the hybrid system with the optimized link lengths

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