Omar Ben Dali
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View article: 3D-Printed Piezoelectric PLA-Based Insole for Event Detection in Gait Analysis
3D-Printed Piezoelectric PLA-Based Insole for Event Detection in Gait Analysis Open
Detecting human movement is crucial for the control of lower limb wearable robotics designed to assist daily activities or rehabilitation tasks. Sensorized insoles present a viable option for extracting control inputs, such as gait events …
View article: Piezoelectret Sensors from Direct 3D-Printing onto Bulk Films
Piezoelectret Sensors from Direct 3D-Printing onto Bulk Films Open
The development of piezoelectric sensors using ferroelectrets is a very active field that is increasingly gaining importance. Recently, 3D-printing ferroelectret sensors using fused deposition modeling technique has been extensively invest…
View article: Low Creep 3D-Printed Piezoresistive Force Sensor for Structural Integration
Low Creep 3D-Printed Piezoresistive Force Sensor for Structural Integration Open
Attempts in research to equip robotic end-effectors with tactile sensing facilitate an advanced environment perception and provide the means for dexterous interaction. Sensing at the fingertips can be realized using force sensors. In this …
View article: 3D-Printed Strain Gauges Based on Conductive Filament for Experimental Stress Analysis
3D-Printed Strain Gauges Based on Conductive Filament for Experimental Stress Analysis Open
We present a method for manufacturing 3D-printed strain gauges by means of fused filament fabrication that are suitable for experimental stress analysis applications. The 3D-printed strain gauge (SG) is based on a multilayer structure, whi…
View article: Biodegradable and Bioabsorbable Polylactic Acid Ferroelectrets with Prominent Piezoelectric Activity
Biodegradable and Bioabsorbable Polylactic Acid Ferroelectrets with Prominent Piezoelectric Activity Open
Ferroelectrets have promoted a variety of exciting flexible sensors, actuators, and microenergy harvesters. However, most ferroelectrets have been fabricated from non‐degradable petro‐based resins, and thus the recycling of these materials…
View article: Ultrasensitive and low-cost insole for gait analysis using piezoelectrets
Ultrasensitive and low-cost insole for gait analysis using piezoelectrets Open
The emerging need of wearable healthcare monitoring systems for e.g. predicting cognitive decline, necessitates practical requirements such as high sensor sensitivity and low fabrication costs. In this work, we present an ultrasensitive pi…
View article: Highly Efficient Piezoelectrets through Ultra-Soft Elastomeric Spacers
Highly Efficient Piezoelectrets through Ultra-Soft Elastomeric Spacers Open
Piezoelectrets are artificial ferroelectrics that are produced from non-polar air-filled porous polymers by symmetry breaking through high-voltage-induced Paschen breakdown in air. A new strategy for three-layer polymer sandwiches is intro…
View article: Ferroelectret energy harvesting with 3D‐printed air‐spaced cantilever design
Ferroelectret energy harvesting with 3D‐printed air‐spaced cantilever design Open
Vibrational energy harvesters of air‐spaced cantilever design, utilizing ferroelectrets as the electroactive element, are a very recent concept. Such systems, based on the piezoelectric effect are further studied with harvesters of improve…
View article: Biodegradable cellular polylactic acid ferroelectrets with strong longitudinal and transverse piezoelectricity
Biodegradable cellular polylactic acid ferroelectrets with strong longitudinal and transverse piezoelectricity Open
Polymers with electrically charged internal air cavities (ferroelectrets) reveal a pronounced piezoelectric response and are regarded as soft electroactive multi-functional materials. This work presents preliminary results on the preparati…
View article: Microenergy Harvesters Based on Fluorinated Ethylene Propylene Piezotubes
Microenergy Harvesters Based on Fluorinated Ethylene Propylene Piezotubes Open
Energy harvesting from vibrations provides power to low‐energy‐consuming electronics for standalone and wearable devices as well as for wireless and remote sensing. In this contribution, compact tubular ferroelectret energy harvesters util…