Improving the Accuracy of Angle Measurement System with Optical Grating

Zhang, G.X.; Wang, C.H.; Li, Z.

doi:10.1016/s0007-8506(07)62252-5

Cited by 15 publications

(5 citation statements)

References 6 publications

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“…With the development of electronic and computer technologies, many platforms are widely used in the signal processing for orthogonal signals, such as the hardware (Birch, 1990, Downs & Birch, 1983, FPGA (Hu et al, 2009), the software programming (Zhang et al, 1994, Su et al, 2000, LabVIEW (Yacoot et al, 2001), DSP (Zumberge et al, 2004), and so on. Besides the analog signal processing and the digital signal processing, the image processing is also an important method to realize the fringe analysis (Takeda et al, 1982, Qian, 2004.…”

Section: Implementation Platformmentioning

confidence: 99%

Optical Interference Signal Processing in Precision Dimension Measurement

Hu¹,

Zhang²,

Hu³

et al. 2012

Automation

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Section: Implementation Platformmentioning

confidence: 99%

Optical Interference Signal Processing in Precision Dimension Measurement

Hu¹,

Zhang²,

Hu³

et al. 2012

Automation

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“…To realize on-line angle self-correction of rotary encoders, a common method is to use multiple reading heads located at specified angular positions around the grating scale [17][18][19]. This method uses detection of the Fourier components of the angle deviation to achieve angle self-correction.…”

Section: Introductionmentioning

confidence: 99%

On-line angle self-correction strategy based on a cobweb-structured grating scale

Zhao

et al. 2021

Meas. Sci. Technol.

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Installation eccentricity of the grating scale is the main source of error for rotary optical encoders in practical applications. In this paper, an on-line angle self-correction strategy for rotary optical encoders is proposed. Firstly, the eccentricity error model is described, which explains the numerical relationship between the eccentricity error and the eccentric parameters including eccentric distance and eccentric angle. Then, a bioinspired cobweb-structured grating scale is adopted as the measurement standard of the rotary optical encoder. This grating scale allows the rotary optical encoder to sense the rotary angle and the radial displacement simultaneously. The eccentric parameters can be determined in real time from the rotary angle and the radial displacement information. Thus, the measured rotary angle can be on-line corrected by applying the eccentric parameters to the eccentricity error model. The feasibility and effectiveness of the proposed strategy have been confirmed from the experimental results.

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“…Nowadays, many methods for ADM have been proposed to fulfill industrial demand. Circular optical grating is used to measure rotary angular displacement 1 , 2 . This method becomes very popular due to high angular displacement resolution (0.001″), good stability and high accuracy (0.05″).…”

Section: Introductionmentioning

confidence: 99%

Design of a high-precision and non-contact dynamic angular displacement measurement with dual-Laser Doppler Vibrometers

Chen

Zhang

Zhou

et al. 2018

Sci Rep

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A wide dynamic range, high precision, non-contact and large bandwidth angular displacement measurement (ADM) is greatly necessary for the applications such as industrial control and military equipment. This paper proposes a simple and effective ADM method based on Doppler Effect, heterodyne detection and diffuse reflection, which can fulfill these requirements simultaneously. Two beams of parallel light generated by a pair of laser Doppler vibrometers are incident upon the surface of rotational target, then data processing unit acquires the velocity of dual laser incident points on the moving target, and resolves the rotational angular displacement and translation displacement of target through the relationship between dual laser beams dynamically. Several major measurement errors that may affect the ADM accuracy are analyzed. A high precision rotary table is used as an angular displacement standard to verify the measurement range and accuracy, the verification experiment shows that the measurement range is not less than ±10° and the measurement accuracy is 0.0362° based on the method. After using a polynomial error compensation, the measurement accuracy can be promoted to 0.0088°, and this compensation method can be applied to real time measurement.

show abstract

Improving the Accuracy of Angle Measurement System with Optical Grating

Cited by 15 publications

References 6 publications

Optical Interference Signal Processing in Precision Dimension Measurement

Optical Interference Signal Processing in Precision Dimension Measurement

On-line angle self-correction strategy based on a cobweb-structured grating scale

Design of a high-precision and non-contact dynamic angular displacement measurement with dual-Laser Doppler Vibrometers

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