A New, Adaptable, Optical High-Resolution 3-Axis Sensor
Autor: | Niels Buchhold, Christian Baumgartner |
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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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