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Laser interferometric system for six-axis motion measurement.

Zhipeng Zhang1, Chia-Hsiang Menq

  • 1Precision Measurement and Control Laboratory, Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210, USA.

The Review of Scientific Instruments
|September 4, 2007
PubMed
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This study introduces a precision laser interferometric system for real-time six-axis motion measurement. The system accurately tracks both linear and rotational movements, enabling advanced motion control applications.

Area of Science:

  • Precision Engineering
  • Optical Metrology
  • Instrumentation

Background:

  • Accurate six-axis motion measurement is crucial for advanced manufacturing and scientific research.
  • Existing systems often face limitations in simultaneous linear and rotational measurement capabilities.

Purpose of the Study:

  • To develop a novel precision laser interferometric system for real-time six-axis motion measurement.
  • To establish a closed-form relationship for accurate motion parameter determination.
  • To demonstrate the system's utility in real-world applications.

Main Methods:

  • Integration of retroreflector and plane mirror interferometers for combined measurements.
  • Optical path analysis and kinematic design for system calibration.
  • Development of a closed-form mathematical model relating interferometer readings to motion parameters.

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Main Results:

  • Successful simultaneous measurement of large transverse and rotational motions along three orthogonal axes.
  • Establishment of a precise relationship between six-axis motion parameters and interferometer readings.
  • Demonstration of the system's resolution and measurement range through prototype implementation.

Conclusions:

  • The developed laser interferometric system offers a robust solution for real-time six-axis motion sensing.
  • The system is suitable for integration with advanced motion control stages, including magnetic levitation systems.
  • This technology advances the field of precision measurement and control.