Construction of virtual measurement datum in measuring gear tooth flank by laser interferometry

Zhu, Xindong; Fang, Suping; Yang, Pengcheng; Xian, Wang; Komori, Masaharu

doi:10.1117/1.oe.57.9.094102

Cited by 8 publications

(3 citation statements)

References 16 publications

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“…This method has been applied to measure the gear tooth flanks 4 – 6 In addition, the oblique-incidence optical interferometric system for involute helical gears was proposed by our research group 7 . Its schematic diagram is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Object image and modulation-based method to segment gear tooth flank region from interference fringe patterns

Chen,

Fang,

Wang

et al. 2024

Opt. Eng.

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.To address the segmentation errors caused by the difficulty of determining the threshold values in the conventional method, an automatic segmentation method is proposed in this paper that uses both the object image pattern of the measured gear tooth flank and the modulation values obtained from the interference fringe patterns (IFPs). This segmentation method is integrated into the matching step. The matching step establishes the correlation between the image and the actual gear tooth flank by matching the simulated gear tooth flank image to the real one. First, pixel columns are extracted from both the object image pattern and the IFPs at a specified interval. Then, the boundary points of each column are located by the gray values. Second, the boundary points are optimized by the modulation values and the boundary curves of the gear tooth flank region are fitted by these boundary points. Finally, the simulation gear tooth flank image is matched with the boundary curves of the gear tooth flank region, resulting in the final segmented tooth flank region. The proposed method is verified in several IFPs, and the results show its feasibility and accuracy.

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Section: Introductionmentioning

confidence: 99%

Object image and modulation-based method to segment gear tooth flank region from interference fringe patterns

Chen,

Fang,

Wang

et al. 2024

Opt. Eng.

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“…But restricted by the unambiguity range of half laser wavelength, the test object measured by DH is limited to reflective objects with height less than half wavelength [2]. Zhu et al measured gear tooth surface by single wavelength DH [3]. They obtained the form error by calculating the relative phase difference from ideal reference tooth surface.…”

Section: Introductionmentioning

confidence: 99%

3D Measurement of rough objects based on dual wavelength digital holography

Zhang¹,

Hou²,

Ma³

et al. 2023

International Conference on Optical and Photonic Engineering (icOPEN 2022)

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Traditional topography measurements for rough objects are usually based on point-contact scan. The way of pointcontact scan is usually not a high-efficient way to obtain data. Hence, in practice, only a few traces are measured which result in limited data. In order to obtain topography of sufficient amount of data, the demand for rapid noncontact measurement is increasing. In this work, we propose a dual wavelength digital holography (DWDH) measurement system with a synthetic wavelength of 51µm . We apply the DWDH system for 3D measurement of rougher surfaces and objects with a complex and small-size structure to further explore the measurement capability of DWDH. The proposed system enables the possibility to obtain the entire topography with millions of points of a rough surface in a single noncontact measurement. Firstly, we measure a cylinder workpiece of 10mm radius with a large roughness of Ra = 2.6µm which causes severe noise to measurement. The measured radius is 9.8099mm, which indicates a good accuracy. The mean standard deviation of all measured points is 1.08µm, which indicates a good repeatability and good anti-noise capability of the DWDH system. Then the proposed system is applied to measure the tooth surface of a gear of 1mm module and 18 teeth which has a complex and small-size structure. The measured surface shape agrees with the ideal gear tooth surface shape well. And the mean standard deviation of all measured points is 0.94µm , which also verifies its good repeatability. Our work presents the possibility of broader DWDH applications in industrial topography measurements.

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“…For improving the accuracy and robustness to environmental fluctuations, a homodyne frequencyshifting interference pattern locking system is applied in the interferometry measurement system [11]. Based on the analysis of interference images, a construction method of a virtual standard tooth flank is proposed to improve the accuracy and practicability of the interferometric system [12]. This research has effectively improved the interferogram quality, but it is still hard to collect the entire shape information of the helical gear tooth flank, because the measuring light is shielded.…”

Section: Introductionmentioning

confidence: 99%

Analysis and optimization of shielding in measuring helical gear tooth flank by laser interferometry

Zhu

Wang²,

Yang³

et al. 2022

Meas. Sci. Technol.

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Phase shifting laser interferometry is an effective method to measure the form error of helical gear tooth flank. However, in the measurement, part of the measurement light is inevitably shielded by adjacent tooth or its own structure, cannot be detected by the detector, resulting in the inability to collect complete tooth surface shape information. This problem restrains the practicality of measuring gear tooth flank by laser interferometry. An analysis method and optimal search algorithm for shielding are proposed, respectively, to collect complete tooth surface information of measured gear. Firstly, by proposing an analysis method of shielding based on ray–tracing, the measurable region of helical gear tooth flanks with common parameters are statistically analyzed. The variation law of main parameters and measurable region of common helical gear tooth surface is expounded. Secondly, in order to obtain the complete interferogram, an optimal search algorithm for shielding is proposed by changing the relative position between the measured gear and the measurement optical system. Finally, relevant simulation and experiments prove that the proposed analysis and optimization methods are feasible. Furthermore, when the oblique incidence method is used to measure the shielded precision complex surface, the proposed methods of analyzing and optimizing shielding can be used for reference, to realize the complete measurement of the measured surface.

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Construction of virtual measurement datum in measuring gear tooth flank by laser interferometry

Cited by 8 publications

References 16 publications

Object image and modulation-based method to segment gear tooth flank region from interference fringe patterns

Object image and modulation-based method to segment gear tooth flank region from interference fringe patterns

3D Measurement of rough objects based on dual wavelength digital holography

Analysis and optimization of shielding in measuring helical gear tooth flank by laser interferometry

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