A New, Adaptable, Optical High-Resolution 3-Axis Sensor

Autor: Niels Buchhold, Christian Baumgartner
Rok vydání: 2016
Předmět:
robotic
030506 rehabilitation
Engineering
joystick
Computer science
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
02 engineering and technology
Geometric shape
lcsh:Chemical technology
Biochemistry
Electromagnetic interference
Article
Analytical Chemistry
medical systems
03 medical and health sciences
Software
tactile sensors
assistive technologies
power wheelchair
optical sensor
Joystick
Distortion
0202 electrical engineering
electronic engineering
information engineering
lcsh:TP1-1185
Computer vision
Electrical and Electronic Engineering
Image sensor
Instrumentation
ComputingMethodologies_COMPUTERGRAPHICS
Signal processing
business.industry
020207 software engineering
Atomic and Molecular Physics
and Optics
optics
Microcontroller
Feature (computer vision)
Artificial intelligence
0305 other medical science
business
Position sensor
Tactile sensor
Zdroj: Sensors (Basel, Switzerland)
Sensors, Vol 17, Iss 2, p 254 (2017)
Sensors; Volume 17; Issue 2; Pages: 254
ISSN: 1424-8220
Popis: This article presents a new optical, multi-functional, high-resolution 3-axis sensor which serves to navigate and can, for example, replace standard joysticks in medical devices such as electric wheelchairs, surgical robots or medical diagnosis devices. A light source, e.g., a laser diode, is affixed to a movable axis and projects a random geometric shape on an image sensor (CMOS or CCD). The downstream microcontroller’s software identifies the geometric shape’s center, distortion and size, and then calculates x, y, and z coordinates, which can be processed in attached devices. Depending on the image sensor in use (e.g., 6.41 megapixels), the 3-axis sensor features a resolution of 1544 digits from right to left and 1038 digits up and down. Through interpolation, these values rise by a factor of 100. A unique feature is the exact reproducibility (deflection to coordinates) and its precise ability to return to its neutral position. Moreover, optical signal processing provides a high level of protection against electromagnetic and radio frequency interference. The sensor is adaptive and adjustable to fit a user’s range of motion (stroke and force). This recommendation aims to optimize sensor systems such as joysticks in medical devices in terms of safety, ease of use, and adaptability.
Databáze: OpenAIRE
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