Fabrication and Analysis of a Composite 3D Printed Capacitive Force Sensor

2016 ◽  
Vol 3 (3) ◽  
pp. 136-141 ◽  
Author(s):  
Matt Saari ◽  
Bin Xia ◽  
Bryan Cox ◽  
Paul S. Krueger ◽  
Adam L. Cohen ◽  
...  
Keyword(s):  
Force Sensor ◽  
3D Printed

scholarly journals Applied Force during Piston Prosthesis Placement in a 3D-Printed Model: Freehand vs Robot-Assisted Techniques

2018 ◽  
Vol 160 (2) ◽  
pp. 320-325 ◽  
Author(s):  
Christopher R. Razavi ◽  
Paul R. Wilkening ◽  
Rui Yin ◽  
Nicolas Lamaison ◽  
Russell H. Taylor ◽  
...  
Keyword(s):  
Middle Ear ◽  
Force Sensor ◽  
Neck Surgery ◽  
Maximum Force ◽  
Maximum Magnitude ◽  
Robot Assisted ◽  
Freehand Technique ◽  
Stapes Prosthesis ◽  
3D Printed ◽  
The Mean

Objectives To describe a 3D-printed middle ear model that quantifies the force applied to the modeled incus. To compare the forces applied during placement and crimping of a stapes prosthesis between the Robotic ENT Microsurgery System ( REMS) and the freehand technique in this model. Study Design Prospective feasibility study. Setting Robotics laboratory. Subjects and Methods A middle ear model was designed and 3D printed to facilitate placement and crimping of a piston prosthesis. The modeled incus was mounted to a 6–degree of freedom force sensor to measure forces/torques applied on the incus. Six participants—1 fellowship-trained neurotologist, 2 neurotology fellows, and 3 otolaryngology–head and neck surgery residents—placed and crimped a piston prosthesis in this model, 3 times freehand and 3 times REMS assisted. Maximum force applied to the incus was then calculated for prosthesis placement and crimping from force/torque sensor readings for each trial. Robotic and freehand outcomes were compared with a linear regression model. Results Mean maximum magnitude of force during prosthesis placement was 126.4 ± 73.6 mN and 105.0 ± 69.4 mN for the freehand and robotic techniques, respectively ( P = .404). For prosthesis crimping, the mean maximum magnitude of force was 469.3 ± 225.2 mN for the freehand technique and 272.7 ± 97.4 mN for the robotic technique ( P = .049). Conclusions Preliminary data demonstrate that REMS-assisted stapes prosthesis placement and crimping are feasible with a significant reduction in maximum force applied to the incus during crimping with the REMS in comparison with freehand.

scholarly journals A 3D-Printed Fin Ray Effect Inspired Soft Robotic Gripper with Force Feedback

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1141
Author(s):  
Yang Yang ◽  
Kaixiang Jin ◽  
Honghui Zhu ◽  
Gongfei Song ◽  
Haojian Lu ◽  
...  
Keyword(s):  
Food Industry ◽  
Simple Structure ◽  
Force Feedback ◽  
Force Sensor ◽  
Whole Body ◽  
Service Robot ◽  
Fin Ray ◽  
Wide Range ◽  
3D Printed ◽  
Gripping Force

Soft robotic grippers are able to carry out many tasks that traditional rigid-bodied grippers cannot perform but often have many limitations in terms of control and feedback. In this study, a Fin Ray effect inspired soft robotic gripper is proposed with its whole body directly 3D printed using soft material without the need of assembly. As a result, the soft gripper has a light weight, simple structure, is enabled with high compliance and conformability, and is able to grasp objects with arbitrary geometry. A force sensor is embedded in the inner side of the gripper, which allows the contact force required to grip the object to be measured in order to guarantee successful grasping and to provide the most suitable gripping force. In addition, it enables control and data monitoring of the gripper’s operating state at all times. Characterization and grasping demonstration of the gripper are given in the Experiment section. Results show that the gripper can be used in a wide range of scenarios and applications, such as the service robot and food industry.

scholarly journals A method for image-guided positioning of cochlear specimens in insertion test benches using 3D printed stands

2021 ◽  
Vol 7 (2) ◽  
pp. 105-108
Author(s):  
Thomas S. Rau ◽  
Jakob Cramer ◽  
M. Geraldine Zuniga ◽  
Georg Böttcher ◽  
Thomas Lenarz
Keyword(s):  
Ex Vivo ◽  
Electrode Array ◽  
Force Sensor ◽  
Rigid Fixation ◽  
Image Guided ◽  
Specimen Holder ◽  
Individual Specimen ◽  
3D Printed ◽  
Parametric Cad ◽  
The Individual

Abstract Cochlear implants include an electrode array (EA) which needs to be inserted into the cochlea. Insertion tests using artificial cochlear models (ACM) or ex vivo specimens are widely used methods during EA development to characterize EA design properties, including insertion forces. Measured forces are directly linked to the orientation of the cochlear lumen with respect to the insertion axis of the test bench. While desired insertion directions in ACM experiments can be predefined by design, specimens are individually shaped and the cochlear lumen is embedded invisibly. Therefore, a new method for accurate, individual specimen positioning is required. A key element of the proposed method is a customizable pose setting adapter (PSA) used to adjust the specimen’s fine positioning. After rigid fixation of the specimen to a holder featuring spherical registration markers and subsequent cone beam computed tomography the desired insertion direction is planned. The planned data is used to calculate the individual shape of the PSA. Finally, the PSA is 3D printed and mounted between force sensor and specimen holder to correctly align the specimen to the test bench’s insertion axis. All necessary hard- and software have been developed including the specimen holder, a software for registration and trajectory planning, and a custom Matlab script whose output drives a parametric CAD file of the PSA. Positioning accuracy was determined in a first trial using 10 virtual trajectories and was found to be 0.23 ± 0.12 mm and 0.38 ± 0.17°. The presented stereotactic positioning procedure enables high repeatability in future ex vivo insertion experiments due to accurate, image-guided control of the insertion direction.

3D Printed Force Sensor with Inkjet Printed Piezoresistive Based Strain Gauge

2018 ◽  
Author(s):  
Mingjie Liu ◽  
Yulong Zhao ◽  
Yiwei Shao ◽  
Qi Zhang ◽  
Chuanqi Liu
Keyword(s):  
Strain Gauge ◽  
Force Sensor ◽  
3D Printed

Development of a 3D Printed Gap Gauge with Embedded Force Sensor for Balancing Unicompartmental Knee Arthroplasty.

2021 ◽  
Author(s):  
Dimitrios Kosmas ◽  
Hans-Peter van Jonbergen ◽  
Martijn Schouten ◽  
Momen Abayazid ◽  
Gijs Krijnen
Keyword(s):  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Force Sensor ◽  
Unicompartmental Knee ◽  
3D Printed

Design and Development of Flexible Systems Load Deflection Tester

2019 ◽  
Author(s):  
Ayse Tekes ◽  
Mohammed Mayeed ◽  
Kevin McFall
Keyword(s):  
Compliant Mechanisms ◽  
Low Cost ◽  
Force Sensor ◽  
Flexible Systems ◽  
Deflection Curve ◽  
Design And Development ◽  
Vision Measurement ◽  
Stepper Motors ◽  
3D Printed ◽  
Deflection Test

Abstract This study presents the design and development of a novel, low-cost load-deflection test setup providing the testing of flexible links and compliant mechanisms. Test bench consists of two stepper motors, lead screw, rail system, two carts, two clamps, bearings and a force sensor. Clamps are designed in a way to attach various types of compliant members such as pinned-pinned buckling beam, fixed-fixed beam and 3D printed links. Mechanism enables to calculate the stiffness of compliant and 3D printed flexible systems. Sliders are displaced quasi-statically to slowly stretch or compress the flexible members attached in between two clamps. Displacement of the carts and deflection of the midpoint of the buckling beams are captured using machine vision measurement. Force applied from one of the carts to the end of the attached link is recorded using the force sensor. Stiffness of 3D printed flexible translational vibratory mechanisms is obtained using the displacement of the carts and load deflection curve of buckling beams are obtained using deflection curve and load data. Experimental results are compared with the same simulations performed by FEA analysis.

Robotic Stimulation of Freely Moving Drosophila Larvae Using a 3D-Printed Micro Force Sensor

2019 ◽  
Vol 19 (8) ◽  
pp. 3165-3173 ◽  
Author(s):  
Peng Pan ◽  
Juntian Qu ◽  
Weize Zhang ◽  
Xianke Dong ◽  
Wei Wei ◽  
...  
Keyword(s):  
Force Sensor ◽  
3D Printed ◽  
Freely Moving ◽  
Micro Force Sensor ◽  
Stimulation Of
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