scholarly journals Customizable Optical Force Sensor for Fast Prototyping and Cost-Effective Applications

Sensors ◽  
2018 ◽  
Vol 18 (2) ◽  
pp. 493 ◽  
Author(s):  
Jorge Díez ◽  
José Catalán ◽  
Andrea Blanco ◽  
José García-Perez ◽  
Francisco Badesa ◽  
...  
Keyword(s):  
Cost Effective ◽  
Force Sensor ◽  
Optical Force ◽  
Fast Prototyping

scholarly journals A Disposable Pneumatic Microgripper for Cell Manipulation with Image-Based Force Sensing

Micromachines ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 707 ◽  
Author(s):  
Benjamin Gursky ◽  
Sebastian Bütefisch ◽  
Monika Leester-Schädel ◽  
Kangqi Li ◽  
Barbara Matheis ◽  
...  
Keyword(s):  
Cell Damage ◽  
Cost Effective ◽  
Force Sensor ◽  
Cell Manipulation ◽  
Patch Clamp Technique ◽  
Liquid Environment ◽  
Reusable Components ◽  
Electrophysiological Measurements ◽  
Single Use ◽  
Gripping Force

A new design for a single-use disposable pneumatic microgripper is presented in this paper. It enables very cost-effective batch microfabrication in SU-8 with a single lithography mask by shifting manufacturing complexity into reusable components. An optically readable force sensor with potential to be used in a feedback loop has been integrated in order to enable gripping with a controlled force. The sensors are first examined separately from the gripper and exhibit good linearity. The gripper function utilizes the disposable gripper element together with a reusable gripper fixture. During experiments, the pneumatically actuated microgripper can vary the gripping force within a range of a few mN (up to 5.7 mN was observed). This microgripper is planned to be used in a liquid environment for gripping larger aggregates of cells in combination with the patch clamp technique. This approach will allow Langerhans islets suspended in an electrolyte solution to be grasped and held during electrophysiological measurements without cell damage.

scholarly journals Optimization of a Handwriting Method by an Automated Ink Pen for Cost-Effective and Sustainable Sensors

Chemosensors ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 264
Author(s):  
Florin C. Loghin ◽  
José F. Salmerón ◽  
Paolo Lugli ◽  
Markus Becherer ◽  
Aniello Falco ◽  
...  
Keyword(s):  
Printed Electronics ◽  
Low Cost ◽  
Electronic Devices ◽  
Cost Effective ◽  
Capacitive Sensor ◽  
Fabrication Technique ◽  
Rfid Tag ◽  
Environmental Friendly ◽  
Fast Prototyping ◽  
Do It Yourself

In this work, we present a do-it-yourself (DIY) approach for the environmental-friendly fabrication of printed electronic devices and sensors. The setup consists only of an automated handwriting robot and pens filled with silver conductive inks. Here, we thoroughly studied the fabrication technique and different optimized parameters. The best-achieved results were 300 mΩ/sq as sheet resistance with a printing resolution of 200 µm. The optimized parameters were used to manufacture fully functional electronics devices: a capacitive sensor and a RFID tag, essential for the remote reading of the measurements. This technique for printed electronics represents an alternative for fast-prototyping and ultra-low-cost fabrication because of both the cheap equipment required and the minimal waste of materials, which is especially interesting for the development of cost-effective sensors.

High-sensitive optical force sensor based on enhanced effective index modulation

Optik ◽  
2018 ◽  
Vol 168 ◽  
pp. 684-691
Author(s):  
Xiaolan Li ◽  
Yanxin Zhang ◽  
Weigang Zhang ◽  
TiEyi Yan ◽  
Yunshan Zhang
Keyword(s):  
Force Sensor ◽  
Effective Index ◽  
Optical Force ◽  
Index Modulation

scholarly journals Hand exoskeleton for rehabilitation therapies with integrated optical force sensor

2018 ◽  
Vol 10 (2) ◽  
pp. 168781401775388 ◽  
Author(s):  
Jorge A Díez ◽  
Andrea Blanco ◽  
José María Catalán ◽  
Francisco J Badesa ◽  
Luis Daniel Lledó ◽  
...  
Keyword(s):  
Force Sensor ◽  
Optical Force ◽  
Integrated Optical ◽  
Hand Exoskeleton

Optical Force Sensor With Enhanced Resolution for MRI Guided Biopsy

2020 ◽  
Vol 20 (16) ◽  
pp. 9202-9208
Author(s):  
Dogangun Uzun ◽  
Okan Ulgen ◽  
Ozgur Kocaturk
Keyword(s):  
Force Sensor ◽  
Optical Force ◽  
Guided Biopsy ◽  
Enhanced Resolution ◽  
Mri Guided

Utilizing the Nonlinearity of Tendon Elasticity for Compensation of Unknown Gravity of Payload

2018 ◽  
Vol 30 (6) ◽  
pp. 873-879
Author(s):  
Chao Shao ◽  
Junki Togashi ◽  
Kazuhisa Mitobe ◽  
Genci Capi ◽  
◽  
...  
Keyword(s):  
Low Cost ◽  
Cost Effective ◽  
Force Sensor ◽  
Error Reduction ◽  
Position Error ◽  
Gravity Compensation ◽  
Robot Arm ◽  
Positioning Control ◽  
State Position ◽  
Significant Cost Reduction

This paper discusses the positioning control of an elastic tendon-driven robot arm under gravity. The robot is driven by rubber string tendons and winding drums attached on the outside frames. Low-cost rubber strings that are available commercially are used as tendons. The goal is to utilize the nonlinear nature of the rubber materials to control a low-cost and soft robot arm. Theoretically, a mathematical model with accurate parameters and accurate measurement of the payload weight is necessary for rigorous gravity compensation. However, the necessity for the information of the robot parameters is hindering easy adaptability, versatility, and cost-efficiency. This paper presents an iterative estimation and compensation method for unknown payloads based on the steady-state position error and the nominal stiffness coefficient. Owing to the nonlinearity of the actual rubber strings, the position error remains after a single operation of the gravity compensation. However, experiments indicate that the error reduces by a simple iteration of the same compensation operation. Considering the nonlinearity in rubber strings, the mechanism of the error reduction is analyzed theoretically. Although the iterative process is time consuming, the method requires less prior information. In addition, it is cost effective because a sophisticated force sensor is not required. As the mechanism of error reduction applies to typical rubber string materials, it is useful for significant cost-reduction and reconfigurable robotics.

High Sensitive Force Sensing Based on the Optical Fiber Coupling Loss

2013 ◽  
Vol 7 (1) ◽  
Author(s):  
Roozbeh Ahmadi ◽  
Muthukumaran Packirisamy ◽  
Javad Dargahi
Keyword(s):  
Optical Fibers ◽  
Light Transmission ◽  
Force Sensor ◽  
Measurement Range ◽  
Optical Force ◽  
Test Results ◽  
Length Width ◽  
Force Range ◽  
Minimally Invasive Robotic Surgery ◽  
Dynamic Loading Conditions

In the present paper, an innovative miniaturized optical force sensor is introduced for use in medical devices such as minimally invasive robotic-surgery instruments. The sensing principle of the sensor relies on light transmission in optical fibers. Although the sensor is designed for use in surgical systems, it can be used in various other applications due to its novel features. The novelty of the sensor lies in offering four features in a single miniaturized package using a simple optical-based sensing principle. These four features are the high accuracy/resolution, the magnetic resonance compatibility, the electrical passivity, and the absence of drift in the measurement of continuous static force. The proposed sensor was micromachined using microsystems technology and tested. The sensor measures 18 mm, 4 mm, and 1 mm in length, width, and thickness, respectively. The sensor was calibrated and its performance under both static and dynamic loading conditions was investigated. The experimental test results demonstrate a 0.00–2.00 N force range with an rms error of approximately 2% of the force range. Its resolution is 0.02 N. The characteristics of the sensor such as its size, its measurement range, and its sensitivity are also easily tunable.

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