A real-time optical sensor for simultaneous measurement of 3-DOF motions

Kok Meng Lee, Debao Zhou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

20 Scopus citations

Abstract

The need for simultaneous measurement of more-than-one degree-of-freedom (DOF) motions can be found in numerous applications such as robotic assembly, precision machining, optical tracking, wrist actuators, and active joysticks. Conventional encoders, though they are able to provide very high-resolution measurements (linear or angular), are limited to single-DOF sensing in motion control. The use of these single-DOF encoders for measuring 3-DOF motions in real time often requires additional mechanical linkages that often introduce frictions and backlashes. We present here a non-contact optical sensor for measuring multi-DOF motions. This paper begins with the operational principle of a microscopic-surface-based optical sensor. The design concept and theory of a dual-sensor system capable of measuring a 3-DOF planar motion in real time is then presented. Along with a detailed analysis, the concept feasibility of a prototype 3-DOF dual-sensor system for measuring the instantaneous center of rotation and the angular displacement of a moving surface is demonstrated experimentally. It is expected that the analysis will serve as a basis for optimizing key design parameters that significantly influence the sensor performance.

Original languageEnglish (US)
Title of host publicationProceedings - 2003 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2003
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages472-477
Number of pages6
ISBN (Electronic)0780377591
DOIs
StatePublished - Jan 1 2003
Event2003 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2003 - Kobe, Japan
Duration: Jul 20 2003Jul 24 2003

Publication series

NameIEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM
Volume1

Other

Other2003 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2003
CountryJapan
CityKobe
Period7/20/037/24/03

Keywords

  • Actuators
  • Machining
  • Mechanical variables measurement
  • Motion control
  • Motion measurement
  • Optical microscopy
  • Optical sensors
  • Robotic assembly
  • Tracking
  • Wrist

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