Your Selections

Medical
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Magazine

Series

new

Optimization of Pneumatic Network Actuators with Isosceles Trapezoidal Chambers

SAE International Journal of Materials and Manufacturing

China-Juekuan Yang
Nanjing University of Aeronautics and Astronautics, China-Shuxin Wang
  • Journal Article
  • 05-12-03-0016
Published 2019-10-04 by SAE International in United States
Soft actuators with pneumatic network have innovative potential applications in medical and rehabilitation areas. The performance of this kind of actuators is determined by the design of chambers and the properties of the active extensible layer and the passive inextensible layer. In this article, actuator with isosceles trapezoidal chambers is proposed. Orthogonal experiment design and finite element method are used to optimize the structure of actuators. Results indicate that adding constrain-limiting paper in the passive layer can significantly reduce the bending radius. Position of the paper in the passive layer also affects the bending radius. Actuators with trapezoidal chambers can have a smaller bending radius compared with that with rectangle chambers. The bending radius decreases as the ratio of short base to long base of trapezoid decreases. Increasing the number density of chambers can further reduce the bending radius. In addition, we find that the optimized actuator not only has a smallest bending radius but also can exert a largest force at its tip.
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.
new

Hydration Sensor Could Improve Dialysis

  • Magazine Article
  • TBMG-35344
Published 2019-10-01 by Tech Briefs Media Group in United States

A new portable sensor can accurately measure patients’ hydration levels using a technique known as nuclear magnetic resonance (NMR) relaxometry. Such a device could be useful for not only dialysis patients but also people with congestive heart failure, as well as athletes and elderly people who may be in danger of becoming dehydrated.

Annotation ability available
new

Medical Camera Could Cut Costs and Time

  • Magazine Article
  • TBMG-35346
Published 2019-10-01 by Tech Briefs Media Group in United States

Researchers have developed a camera to detect and image radioactive tracers used in PET and in SPECT scans at the same time, with the hope of enabling doctors to scan patients for abnormalities in less time, while reducing the amount of patient exposure to radiation.

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.
new

Programmable Soft Actuators for Soft Robotics

  • Magazine Article
  • TBMG-35348
Published 2019-10-01 by Tech Briefs Media Group in United States

Researchers have developed highly programmable actuators that, similar to the human hand, combine soft and hard materials to perform complex movements. These materials have great potential for soft robots that can safely and effectively interact with humans and other delicate objects.

Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.
new

Automation: The Future of Medical Manufacturing

  • Magazine Article
  • TBMG-35367
Published 2019-10-01 by Tech Briefs Media Group in United States

Manufacturers in the medical industry face unique challenges in terms of product mix, throughput requirements, quality standards, and regulatory guidelines. Whether a company is developing imaging equipment, orthopedic implants, or diagnostics, the manufacturing process must be absolutely error free while delivering high throughput. Device companies are looking more and more to factory automation to ensure that they are addressing these disparate requirements.

Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.
new

Dynamic Microstructures Move by Light and Temperature

  • Magazine Article
  • TBMG-35270
Published 2019-10-01 by Tech Briefs Media Group in United States

3D printing via direct laser writing involves a computer-controlled focused laser beam that acts as a pen and creates the desired structure in the printer ink — a photoresist. In this way, any three-dimensional form down to the size of a few micrometers can be created.

Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.
new

Q&A: Wearable Motion Sensors Could Save Unborn Babies

  • Magazine Article
  • TBMG-35275
Published 2019-10-01 by Tech Briefs Media Group in United States

Negar Tavossolian is Associate Professor of Electrical and Computer Engineering at Stevens Institute of Technology, Hoboken, NJ. She led a project to develop a lightweight, non-invasive sensor to monitor fetal heart rate and motion that could sense abnormalities warning of possible stillbirths.

Annotation ability available
new

High-Sensitivity, Low-Noise MEMS Accelerometer

  • Magazine Article
  • TBMG-35294
Published 2019-10-01 by Tech Briefs Media Group in United States

A high-sensitivity and low-noise MEMS accelerometer was developed using multi-layer metal structures composed of multiple metal layers. The accelerometer achieves 1 μG level resolution that has been a challenging task with conventional MEMS technology. The team previously proposed a method of using gold material to downscale the proof mass size of MEMS accelerometers to less than one-tenth. In this work, they have increased the proof mass per area by employing multiple layers of gold for the MEMS structures, thereby increasing the sensitivity over 100 times and reducing noise less than one-tenth when compared with conventional accelerometers.

new

Hydrogel Fights Orthopedic Bone Infections

  • Magazine Article
  • TBMG-35329
Published 2019-10-01 by Tech Briefs Media Group in United States

Researchers have a developed a double-duty hydrogel that both attacks the bacteria and encourages bone regrowth with a single application containing two active components.

new

Less Training Needed for Brain-Machine Interfaces

  • Magazine Article
  • TBMG-35338
Published 2019-10-01 by Tech Briefs Media Group in United States

Brain-machine interfaces (BMIs) are rarely found outside of medical clinics, where the disabled receive hours or days of training in order to operate wheelchairs with their minds. Now the largest-ever BMI experiment Mental Work, conducted as an experimental artwork at EPFL's Artlab, has provided preliminary evidence that training time can be shortened, the use of dry electrodes are a robust solution for public BMI and that user performance tends to improve within a relatively short period of time.