10.14489/td.2017.07.pp.012-024

2017, 07July

DOI: 10.14489/td.2017.07.pp.012-024

Makhov V. E., Potapov A. I., Shaldaev S. E.
CONTROL OF THE IMAGE FUNCTION OPTOELECTRONIC SYSTEM CONVERSION METHOD IN IMAGE CONTRAST
(pp. 12-24)

Abstract. Background. Optoelectronic systems are widely used in industrial control systems for the shape and linear dimensions of products. Difficulties are caused by the control of three-dimensional, low-contrast and optically transparent objects. There are known the development of the principle of recording the light field, based on the determination of the intensities and directions of the rays in the optical system, which opens new possibilities in the field of contactless control methods. Due to the insufficient development of technical solutions for recording the light field, no studies have been carried out in this field previously. The actual task is to investigate the possibility of control systems operating on the principle of registering a light field in measuring problems of monitoring geometric parameters of products. Materials and/or methods. To obtain images of controlled products, digital cameras with sensors of different operating principles were used: CCD, CMOS, Faveon, light field. To measure the linear dimensions of the product, the computer technology of the virtual instruments (VI) of National Instruments (NI), the NI LabVIEW application development environment, and the image manipulation module NI IMAQ Vision, were used. NI Vision Assistant was used to interactively develop the algorithm for processing the original image and measuring the product dimensions. For calibration of the optoelectronic system, length standards were used. Results. The light field recording devices allow obtaining a high contrast of the boundary gradient over the depth of space and realizing the measurement of linear dimensions in three-dimensional objects. The need to take into account the shape of the surface and the plane of localization of the boundaries of the controlled structural elements is shown. As a result of the research, it was found that when recording with digital cameras the light field, the algorithms for measuring linear dimensions give several times greater accuracy along the contrast lines compared to the designing optical devices. Conclusion. The conducted researches have shown that the use of the principle of recording the light field allows for the dimensional control of products of complex shape. The possibility of making measurements with an accuracy of up to one unit of the discretization of the light field is shown. The expansion of the field of application of optoelectronic measuring systems for the control of geometric shapes, control of the surface quality of products with unilateral access to the measured object is shown.

Keywords: optoelectronic system, matrix photo detector, light field, light field camera, plenoptic chamber, calibration of measurements, virtual instrument (VI).

+ - About the Authors Click to collapse

V. E. Makhov (Mozhaisky Military Space Academy, St. Petersburg, Russia; Saint-Petersburg Mining University, St. Petersburg, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.
A. I. Potapov (Saint-Petersburg mining University, St. Petersburg, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.
S. E. Shaldaev (Mozhaisky Military Space Academy, St. Petersburg, Russia)

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