Abstract
The method and structural scheme of an information-measuring system for determining the parameters of objects' movements (technological equipment in the quarry for extracting block natural stone) have been proposed. A distinctive feature of time video sequences containing images of measured objects is their adaptation and adjustment in accordance with the intensity of movement and accuracy requirements for measurement results. Structural and software-algorithmic methods were also applied for improving the accuracy of measurements of motion parameters, namely: complexation of two measuring channels and exponential smoothing of digital references. One of the measuring channels is based on a digital video camera, the second is based on an accelerometer mounted on an object and two integrators. Exponential smoothing makes it possible to take into consideration the previous countdowns of movement parameters with weight coefficients. That ensures accounting for the existing patterns of movement of the object and reducing the errors when measuring the parameters of movement by (1.4...1.6) times. The resulting solutions have been implemented in the form of an information and measurement system. The technological process of extracting blocks of natural stone in the quarry was experimentally investigated using a diamond-rope installation. Based on the contactless measurement of motion parameters, it is possible to ensure control over this process and improve the quality of blocks made of natural stone. Based on the experimental study of measurement errors, recommendations were given for the selection of adaptive parameters of a video sequence, namely the size of images and the value of the inter-frame interval. In addition, methods for the software-algorithmic processing of measuring information were selected, specifically exponential smoothing and averaging the coordinates of the contour of an object, measured in 30 adjacent lines of the image
Highlights
Measurements of various mechanical quantities are widely used at enterprises for the extraction and processing of natural stone
Since the method of determining motion parameters employs the software-algorithmic processing of images, it is necessary to determine the sequence of formation and processing of time video sequences with measuring information about the parameters of objects’ movements
Video information device software where ηr( j) and ηv( j) are the weight coefficients to take into consideration the coordinate and movements based on time video sequences 12 velocity values measured in previous moments, respectively
Summary
Measurements of various mechanical quantities are widely used at enterprises for the extraction and processing of natural stone This includes the moving and motion parameters of industrial objects. The results of these measurements are used to manage production processes and comply with technological norms in the manufacture of articles made of natural stone, as well as to control their quality and increase competitiveness [1,2,3,4]. Contactless methods and measuring tools can control the technological processes and quality of industrial articles during their manufacture [1] This approach will provide the measurement of the parameters of objects’ movements in real time with increased. To improve the quality of articles, it is necessary to receive and analyze in real time the instantaneous values of movement parameters for all modes of operation of technological equipment. It is a relevant task to study the development of a method for measuring the parameters of the objects’ movements with adaptive parameters of a video sequence
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