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Precision encoder grating mounting: a near-sensor computing approach.

Jingyi Yu1,2, Runjiang Dou3,4, Wennong Zhang5

  • 1Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology, School of Microelectronics, Tianjin University, Tianjin, 300072, China.

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|September 27, 2024
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Summary
This summary is machine-generated.

This study introduces an automated system to precisely mount encoder gratings on rotary motors, significantly improving motor angle measurement accuracy. The system calculates and corrects eccentricity in real-time, ensuring higher precision in motion control applications.

Keywords:
Encoder grating eccentricityImage processingMachine visionManufacturing automationNear-sensor computingRotary encoder

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Area of Science:

  • Robotics and Automation
  • Mechanical Engineering
  • Sensor Technology

Background:

  • Rotary motors are crucial for motion control, but encoder grating installation errors (eccentricity) compromise angle measurement accuracy.
  • Manual encoder grating alignment is time-consuming and prone to inaccuracies, impacting overall system performance.

Purpose of the Study:

  • To develop and validate a precision automated system for mounting encoder gratings on rotary motors.
  • To enhance the accuracy and efficiency of motor angle measurements by minimizing encoder grating eccentricity.

Main Methods:

  • A novel system utilizing a near-sensor detector and a push rod for automated encoder grating mounting.
  • Real-time eccentricity and angle calculation using an edge processor and edge-vision algorithms on captured grating images.
  • Automated adjustment of grating position based on computed eccentricity data.

Main Results:

  • The system achieved real-time eccentricity and angle detection within 2.8 seconds.
  • Automated mounting tasks were completed with an average time of 25.1 seconds.
  • The final average eccentricity after mounting was reduced to an impressive 3.8 µm.

Conclusions:

  • The proposed automated system significantly improves encoder grating mounting precision and efficiency.
  • Real-time eccentricity calculation and correction are key to enhancing motor angle measurement accuracy.
  • This technology offers a robust solution for high-precision motion control systems.