This paper proposes the use of an optoelectronic autocollimator constructed according to an auto-reflection scheme with a passive control element as a device for monitoring the supporting structures of infrastructure facilities. The results of the possibility of applying the autoreflection scheme for solving this problem, information about the control element and solving problems arising from its use are presented in this paper. The control element does not require a power supply at the control point and can be installed anywhere in the structure. The theoretical results are backed by experimental results. The main feature of the proposed solution is a single-channel system with reduced dimensions and weight in comparison with traditional schemes. The device allows you to register the reflected radiation from the passive control element installed on the monitored object and to determine the angular displacement along the axes OX and OY and linear displacements along the same axes in real time. The proposed solution in comparison with analogues has a smaller weight and size, is able to control a larger number of coordinates and is not inferior in accuracy while having a large metrological range by reducing the area of inoperability and features of the auto-reflection scheme.
The construction features of autocollimation systems for measurement the large-sized and extended objects deformations at industry, power and scientific instrument making are considered. The conditions of increase of a distance of measurement are analyzed in comparison with the serial autocollimation devices. The error of measurement by the restriction of a working beam is investigated. The structure of algorithm for reduces the systematic error of the measurement which based on received analytical expression of function of an error is determined.
The autoreflection systems allows measuring a mirror turning angle as sensitive element in a point of angular deformation with a potential accuracy up to 0.05". Actually the error can exceed considerably the specified value because of existence of systematic error, one of which main components is the error owing to vignetting of a working beam. The component of systematic error due to vignetting of the beam can be eliminated using the compensation algorithm which allows to increase the working distance at the autoreflection measurements. This algorithm bases on vignetting coefficients. In this article we have found the vignetting coefficients using an autoreflection system.
The construction features of autocollimation systems for measurement the large-sized and extended objects deformations
at industry, power and scientific instrument making are considered. The conditions of increase of a distance of
measurement are analyzed in comparison with the serial autocollimation devices. The error of measurement by the
restriction of a working beam is investigated. The structure of algorithm for reduces the systematic error of the
measurement which based on received analytical expression of function of an error is determined.
The construction features of autocollimation systems for measurement the large-sized and extended objects deformations at industry, power and scientific instrument making are considered. The conditions of increase of a distance of measurement are analyzed in comparison with the serial autocollimation devices. The error of measurement by the restriction of a working beam is investigated. The structure of algorithm for reduces the systematic error of the measurement which based on received analytical expression of function of an error is determined.
Nowadays one of metrology problems is the measurement of angular values, in particular, angular deformations in the critical points of oversized objects. For the solution of this problem, effectively use optoelectronic autoreflection systems. The autoreflection systems allows measuring a mirror turning angle as sensitive element in a point of angular deformation with a potential accuracy up to 0.05". Actually the error can exceed considerably the specified value because of existence of systematic error, one of which main components is the error flowing to vignetting of a working beam. The component of systematic error due to vignetting of the beam can be eliminated in case of existence of the analytical description of changes in irradiance distribution of the analyzed image. Because of the complexity of the analytical description of the vignetting processes proposes the use of computer models. Based on the received dependence for compensation of systematic error due to vignetting is equal D=30 arcsecs. As this systematic measurement error unacceptably large, there is a need to compensate for this error. For the design of the algorithm compensate for systematic error were considered three cases of displacement vignetting field on a matrix analyzer due to the rotation of control element. Using the compensation algorithm, the error due to the vignetting amounts to a negligible value 0.4 arcsecs. The designed algorithm compensation systematic error due to vignetting allows to increase the working distance at the autoreflection measurements.
Autocollimation systems are widely used to measure angular values, in particular, angular deformations in the critical points of large objects, angles of optical components, and for controlling the straightness and parallelism. Autocollimator measures the rotation angle of the mirror as the sensitive element at angular deformation point with a potential accuracy up to 0.005 ". In fact, the error may significantly exceed the specified value because of systematic error existence, one of which main components is the error due to vignetting of working beam. The reason of vignetting error is changing of irradiance distribution of the image on the autocollimator analyzer due to cutting of a bundle of optical beams at a mirror deviation in case of angular deformation. On the basis of a computer simulation image model was investigated the influence of vignetting error and was found compensation algorithm of this error
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