scholarly journals A low-cost, human-like, high-resolution, tactile sensor based on optical fibers and an image sensor

2018 ◽  
Vol 15 (4) ◽  
pp. 172988141878363 ◽  
Author(s):  
Utku Büyükşahin ◽  
Ahmet Kırlı
Keyword(s):  
High Resolution ◽  
Spatial Resolution ◽  
Fiber Optic ◽  
Low Cost ◽  
Experimental Studies ◽  
Main Idea ◽  
Tactile Sensor ◽  
Image Sensor ◽  
Sensor Design ◽  
Tactile Sensors

Tactile sensors are commonly a coordinated group of receptors forming a matrix array meant to measure force or pressure similar to the human skin. Optic-based tactile sensors are flexible, sensitive, and fast; however, the human fingertip’s spatial resolution, which can be regarded as the desired spatial resolution, still could not be reached because of their bulky nature. This article proposes a novel and patented optic-based tactile sensor design, in which fiber optic cables are used to increase the number of sensory receptors per square centimeter. The proposed human-like high-resolution tactile sensor design is based on simple optics and image processing techniques, and it enables high spatial resolution and easy data acquisition at low cost. This design proposes using the change in the intesity of the light occured due to the deformation on contact/measurement surface. The main idea is using fiber optic cables as the afferents of the human physiology which can have 9 µm diameters for both delivering and receiving light beams. The variation of the light intensity enters sequent mathematical models as the input, then, the displacement, the force, and the pressure data are evaluated as the outputs. A prototype tactile sensor is manufactured with 1-mm spatial and 0.61-kPa pressure measurement resolution with 0–15.6 N/cm2 at 30 Hz sampling frequency. Experimental studies with different scenarios are conducted to demonstrate how this state-of-the-art design worked and to evaluate its performance. The overall accuracy of the first prototype, based on different scenarios, is calculated as 93%. This performance is regarded as promising for further developments and applications such as grasp control or haptics.

scholarly journals Miniaturized wireless, skin-integrated sensor networks for quantifying full-body movement behaviors and vital signs in infants

2021 ◽  
Vol 118 (43) ◽  
pp. e2104925118
Author(s):  
Hyoyoung Jeong ◽  
Sung Soo Kwak ◽  
Seokwoo Sohn ◽  
Jong Yoon Lee ◽  
Young Joong Lee ◽  
...  
Keyword(s):  
Inertial Sensors ◽  
Low Cost ◽  
Body Movement ◽  
Vital Signs ◽  
The Body ◽  
Therapeutic Interventions ◽  
Machine Learning Techniques ◽  
Detection Methods ◽  
Integrated Sensor ◽  
Full Body

Early identification of atypical infant movement behaviors consistent with underlying neuromotor pathologies can expedite timely enrollment in therapeutic interventions that exploit inherent neuroplasticity to promote recovery. Traditional neuromotor assessments rely on qualitative evaluations performed by specially trained personnel, mostly available in tertiary medical centers or specialized facilities. Such approaches are high in cost, require geographic proximity to advanced healthcare resources, and yield mostly qualitative insight. This paper introduces a simple, low-cost alternative in the form of a technology customized for quantitatively capturing continuous, full-body kinematics of infants during free living conditions at home or in clinical settings while simultaneously recording essential vital signs data. The system consists of a wireless network of small, flexible inertial sensors placed at strategic locations across the body and operated in a wide-bandwidth and time-synchronized fashion. The data serve as the basis for reconstructing three-dimensional motions in avatar form without the need for video recordings and associated privacy concerns, for remote visual assessments by experts. These quantitative measurements can also be presented in graphical format and analyzed with machine-learning techniques, with potential to automate and systematize traditional motor assessments. Clinical implementations with infants at low and at elevated risks for atypical neuromotor development illustrates application of this system in quantitative and semiquantitative assessments of patterns of gross motor skills, along with body temperature, heart rate, and respiratory rate, from long-term and follow-up measurements over a 3-mo period following birth. The engineering aspects are compatible for scaled deployment, with the potential to improve health outcomes for children worldwide via early, pragmatic detection methods.

scholarly journals A Full-Body Tactile Sensor Suit Using Electrically Conductive Fabric.

1998 ◽  
Vol 16 (1) ◽  
pp. 80-86 ◽  
Author(s):  
Masayuki Inaba ◽  
Yukiko Hoshino ◽  
Hirochika Inoue
Keyword(s):  
Tactile Sensor ◽  
Electrically Conductive ◽  
Conductive Fabric ◽  
Full Body

scholarly journals A low-cost, high-performance, soft tri-axis tactile sensor based on eddy-current effect

2017 ◽  
Author(s):  
Hongbo Wang ◽  
Junwai Kow ◽  
Gregory de Boer ◽  
Dominic Jones ◽  
Ali Alazmani ◽  
...  
Keyword(s):  
Eddy Current ◽  
High Performance ◽  
Low Cost ◽  
Tactile Sensor ◽  
Current Effect ◽  
Eddy Current Effect
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