A new method to measure the distance between graduation lines on graduated scales

Penzes, William B.; Allen, Richard A.; Cresswell, Michael W.; Linholm, L.W.; Teague, E. Clayton

doi:10.1109/imtc.1994.352064

Cited by 1 publication

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An optical microscope can be used to collimate the stripe edges. Photoelectric microscope systems were developed in several countries [3][4][5]. These systems use a slit aperture microscope to detect stripes with the same width as the slit.…”

Section: Introductionmentioning

confidence: 99%

Automatic Laser Interferometer And Vision Measurement System For Stripe Rod Calibration

Zhao¹,

Huang²,

Zhu³

et al. 2015

Metrology and Measurement Systems

View full text Add to dashboard Cite

In order to calibrate the stripe precision of a leveling rod, an automatic laser interferometer and a vision measurement system were designed by Xi'an University of Technology in China. The rod was driven by a closedloop control and the data were collected at the stop state to ensure precision. The laser interferometer provided not only the long distance data but also a position feedback signal in the automatic control loop. CCD camera and a vision measurement method were used to inspect the stripe edge position and defect. A pixel-equivalent self-calibration method was designed to improve precision. ROI (regions of interest) method and an outline tracing method were designed to quickly extract multiple stripe edges. A combination of the image data with the interferometer data reduces control difficulty and ensures the measurement accuracy. The vision measurement method reached sub-pixel precision and the defective edges were reported. The system can automatically calibrate a stripe leveling rod with a high degree of efficiency and precision.

show abstract

Section: Introductionmentioning

confidence: 99%