V.I. Volovach - Ph. D. (Eng.), Associate Professor, Head of Department, Volga Region State University of Service (Togliatti, RF) E-mail: volovach.vi@mail.ru

In article sets out the analytical dependence of the reliability of extended objects detection by radiotechnical systems and devices of a short-range detection, which is a type of widely used short-range radiolocation systems, particularly, in the security systems of various objects. Finding these dependencies allows us to define such probabilistic characteristics of the systems and detection devices as cumulative detection probability and dependecies to the law of the establishing of device contact and to evaluate the effectiveness of the detection of the mentioned systems and devices. When determining the dependency of the reliability of the detection of extended objects used probabilistic-statistical method by which the success of the detection of the object at varying distances will be measured using a statistically valid probability of obtaining a specified range. When determining the integral laws characterizing the probability of detection and the failure to identify extended object, we should consider various factors, which reflect how detection device status and key parameters of the detected object and the environment. In particular, the effective surface scattering of the extended object and its movement speed, characteristics of the transmitter and receiver detection device. Obtaining dependency of detection accuracy of extended objects is based on the use in the research of density of probability of detection, which was previously defined by the author for different directions of movement of the object relative to the detection device. At the obtaining of all analytical equations taking in account the pattern of the receiving antenna of radio equipment detection on the detection object. To account of these effects, we enter the function form of the pattern. In article it is shown that the resulting function of the probability of detection of the extended object can be regarded as a distribution function of the detection range of the extended object; for which graphical dependencies is built. Using these functions make it possible to estimate the probability of detection of the extended object that falls into the range of the detection devices. The graphs illustrating the integral laws of detection and failure of detection of extended objects. It is shown that common in practical cases, engineering calculations is the use of various laws of probability distributions, including Gaussian, for which the expressions of the probabilities of detection and failure to detect is shown. In addition to the above distribution you can use the laws of Rayleigh and Maxwell, and others.

 

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