Efficient monocular vision method used for measuring the angular rate and acceleration in rotation motion

Area of Science:

• Robotics and Control Systems
• Optical Measurement Techniques
• Mechanical Engineering

Background:

• Accurate rotation motion measurement is crucial for inertial navigation, manufacturing, and robot control.
• Existing methods like laser interferometry (LI) face limitations in high accuracy and wide frequency range.
• There is a need for advanced measurement techniques that overcome these limitations.

Purpose of the Study:

• To investigate a novel monocular vision-based method for rotation motion measurement.
• To determine angular rate and angular acceleration with enhanced accuracy and frequency range.
• To provide a simple and flexible hardware implementation for vision measurement systems.

Main Methods:

• Utilized an improved line segmentation detector (LSD) method with sub-pixel accuracy.
• Developed a monocular vision-based system for dynamic unit rotation measurement.
• Conducted comparative experiments against laser interferometry (LI) and grating sensor-based methods.

Main Results:

• Achieved a measurement resolution of 0.0005°.
• Obtained a measurement accuracy of 0.480%.
• Demonstrated effectiveness in the frequency range of 0.001 to 10 Hz.

Conclusions:

• The novel monocular vision-based method significantly enhances measurement accuracy and frequency range for rotation motion.
• The system offers a cost-effective and flexible alternative to conventional measurement techniques.
• This approach holds promise for applications requiring high-precision rotational measurements.