Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

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

Version 1 : Received: 13 December 2016 / Approved: 14 December 2016 / Online: 14 December 2016 (05:12:29 CET)

A peer-reviewed article of this Preprint also exists.

Buchhold, N.; Baumgartner, C. A New, Adaptable, Optical High-Resolution 3-Axis Sensor. Sensors 2017, 17, 254. Buchhold, N.; Baumgartner, C. A New, Adaptable, Optical High-Resolution 3-Axis Sensor. Sensors 2017, 17, 254.

Journal reference: Sensors 2017, 17, 254
DOI: 10.3390/s17020254


This paper 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 software in the downstream microcontroller identifies the geometric shape’s center, distortion and size, then calculates X, Y, and Z coordinates. These coordinates can then be processed in attached devices. The 3-axis sensor is characterized by its very high resolution, precise reproducibility and plausibility of the coordinates produced. In addition, optical processing of the signal provides a high level of safety against electromagnetic and radio frequency interference. The sensor presented here is adaptive and can be adjusted 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.

Subject Areas

tactile sensors; assistive technologies; power wheelchair; medical systems; robotic; joystick; optical sensor

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