A CMOS approach to coaxiality measurement of marine shafting and bearing system

Wang, Tingyu; Lü, Naiguang

doi:10.1117/12.806374

Cited by 3 publications

(2 citation statements)

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“…Passive measurement technology uses one or more cameras to measure the geometric parameters of the stepped shaft [7][8][9]. Wang et al [10] obtained the position of the measurement reference line and the center line through a single-mode optical fiber laser diode and used a CMOS to obtain the coaxiality of large and medium shafting. Liu et al [11] used the light curtain sensor to measure the coaxiality of the EMU axles, and the measurement error caused by the nonparallel connection between the two centers of the axles was studied in paper.…”

Section: Introductionmentioning

confidence: 99%

Coaxiality of Stepped Shaft Measurement Using the Structured Light Vision

Sun³

et al. 2021

Mathematical Problems in Engineering

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A method is proposed to measure the coaxiality of stepped shafts based on line structured light vision. In order to solve the repeated positioning error of the measured shaft, the light plane equation solution method is proposed using movement distance and initial light plane equation. In the coaxiality measurement model, the equation of the reference axis is obtained by the overall least square method through the center point coordinates of each intercept line on the reference axis. The coaxiality error of each shaft segment relative to the reference axis is solved based on the principle of minimum containment. In the experiment, the coaxiality measurement method is evaluated, and the factors that affect the measurement accuracy are analyzed.

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Section: Introductionmentioning

confidence: 99%

Coaxiality of Stepped Shaft Measurement Using the Structured Light Vision

Sun³

et al. 2021

Mathematical Problems in Engineering

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“…The standard procedure for straightness calibration is to use tactile probes running along a straight edge or an interferometric set-up using a Wollaston prism [1]. Since those two methods are quite cumbersome and expensive, using an optically collimated beam to establish a reference line pointing onto a position-sensitive detector (PSD) [2,3] or a four-quadrant diode (4QD) [4], with [5,6] or without a corner cube reflector [7], is also often suggested in the literature. However, the accuracy reported by all systems using this working principle hardly reach 1 µm [5].…”

Section: Introductionmentioning

confidence: 99%

Low-Cost 2D Index and Straightness Measurement System Based on a CMOS Image Sensor

Küng

Bircher

Meli

2019

Sensors

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Accurate traceable measurement systems often use laser interferometers for position measurements in one or more dimensions. Since interferometers provide only incremental information, they are often combined with index sensors to provide a stable reference starting point. Straightness measurements are important for machine axis correction and for systems having several degrees of freedom. In this paper, we investigate the accuracy of an optical two-dimensional (2D) index sensor, which can also be used in a straightness measurement system, based on a fiber-coupled, collimated laser beam pointing onto an image sensor. Additionally, the sensor can directly determine a 2D position over a range of a few millimeters. The device is based on a simple and low-cost complementary metal-oxide-semiconductor (CMOS) image sensor chip and provides sub-micrometer accuracy. The system is an interesting alternative to standard techniques and can even be implemented on machines for real-time corrections. This paper presents the developed sensor properties for various applications and introduces a novel error separation method for straightness measurements.

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On-machine measurement method of hole parallelism error based on multi-sensor fusion

Zhou,

Dong,

et al. 2023

Meas. Sci. Technol.

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The hole parallelism error (HPE) is one of the key quality parameters for mechanical parts. However, HPE can usually be out-of-tolerance due to the coupling effect of residual stress, cutting stress, and geometric structure during its machining process. Thus, on-machine measurement and timely adjustment are important guarantees for HPE. This paper proposes an on-machine measurement method of HPE based on multi-sensor fusion that is low-cost, efficient, and suitable for mass production of parts. First, the axis of the cylindrical surface is directly extracted using five points according to the spatial line position relation. Then, the mathematical model of the HPE of two holes’ axes was established through the theory of spatial analytic geometry. The HPE is characterized using two parameters: parallelism magnitude and parallelism direction. Finally, the feasibility of the measurement method in principle and practical application is verified by simulation and experiment. The simulation tests show that the maximum value of the relative error of parallelism magnitude and parallelism direction is −1.38‱. The actual experiments show that the relative error of the measurement results compared with the coordinate measuring machine is 6.23%. None of the standard deviations exceeds the order of magnitude of 0.01 mm. The difference in measurement uncertainty is 0.0003 mm.

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A CMOS approach to coaxiality measurement of marine shafting and bearing system

Cited by 3 publications

References 0 publications

Coaxiality of Stepped Shaft Measurement Using the Structured Light Vision

Coaxiality of Stepped Shaft Measurement Using the Structured Light Vision

Low-Cost 2D Index and Straightness Measurement System Based on a CMOS Image Sensor

On-machine measurement method of hole parallelism error based on multi-sensor fusion

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