Subject of study. We present details regarding the development of dual-band optoelectronic scanning systems for surveillance and detection of poachers and poaching equipment and the inclusion of image fusion and geolocation capabilities. Aim. We present research on a dual-band optoelectronic system for scanning the surface along a quasicircular trajectory that supports overlapping of frames for efficient fusion of images made from different points of view into a single image used to detect, recognize, and geolocate poaching. Methods. We present simulation and experimental study of a prototype system including television and thermal vision channels, a Global Positioning System (GPS) antenna, and inertial navigation system modules mounted on a stabilized common platform. Main results. We propose a system design that will support simultaneous scanning of a search area in television and thermal imaging channels along a quasicircular trajectory, with the capability to expand the search area and provide 30% frame overlap for efficient image fusion. Gyroscopic sensors on the stabilized common platform for the system and global navigation system antennas will support the requisite accuracy of the surveillance platform and target geolocation. The change in system viewing angle per unit time that would enable the resulting image to be obtained without missing any lines was determined. The primary components of the error in the coordinates of the surveillance platform when surveilling an object were also determined. The combination of field-of-view scanning and use of geolocation equipment supports the recognition of poachers and poaching equipment and the determination of their coordinates within a global coordinate system. An integrated high-precision GPS receiver (ProPak-V3-424) with an inertial system and data processing technology using Tightly Coupled IMU algorithms (Inertial Explorer) was found to be capable of determining the horizontal coordinates of a surveillance platform to within 12 m at a probability of 95% or better. Practical significance. A prototype of the proposed design increased the maximum reliable detection and recognition range for poachers and poaching equipment (cars and trucks) in a forest through the fusion of data obtained in the visible and infrared spectral bands.

Research Subject: The research subject was the error of optoelectronic video endoscopy systems in measuring the chord length of low-pressure cylinder steam turbine blades during shaft rotation. Objective: The objective was to reduce the error of the optoelectronic system in measuring the chord length of turbine rotor blades on a closed cylinder during shaft rotation. Methodology: Analytical research and computer modeling of the information transformation process during blade image formation and processing were carried out. Theoretical and experimental evaluations of the system error were conducted. Main Results: The structure of the components contributing to the error in estimating the chord length of low-pressure turbine blades was analyzed. The contribution of individual components to the total error was identified, and methods for reducing the most significant error components were proposed. Practical Significance: The effectiveness of the proposed methods for error reduction was validated through computer simulations and experimental studies on two system prototypes. The results showed that the standard deviation of the random error component in chord measurement during dynamic operation did not exceed 0.27 mm.

Subject of study. This study is focused on a scintillation optical-electronic converter of gamma radiation based on a silicon photomultiplier. Purpose of the work. This study was carried out to develop an optical-electronic converter of gamma radiation for personal use and operation as part of distributed radiation monitoring systems, under mechanical influences and electromagnetic fields and with an increased transfer characteristic linearity range and improved relative energy resolution. Method. An analysis of the signal-conversion processes in a scintillation optical-electronic converter of gamma radiation is carried out, and a computer simulation and experimental study of the converter are also performed. Main results. The optical-electronic gamma-radiation converter was developed for personal use and operation as part of the distributed radiation monitoring systems in the field. A method for selecting the dimensions of the optical system for the matching of a scintillation crystal and a silicon photomultiplier in addition to the type and parameters of its reflective surfaces was developed, which made it possible to increase the linearity range of the converter transfer characteristic by increasing the uniformity of the photomultiplier irradiation. An algorithm is proposed for estimating the contribution of signal losses from photons arriving at a microcell of a silicon photomultiplier during the restoration of its sensitivity to the relative energy resolution of the converter in experimental studies of the uniformity of irradiation distribution. Practical significance. An optical-electronic converter of gamma radiation has been developed with an increase in the linearity range of the transfer characteristic of up to two times with an integral nonlinearity of the energy characteristic of no more than 1% and an improved relative energy resolution by at least 10% for the peak energy of 662 keV of the reference ¹³⁷Cs source. The optical-electronic converter is designed for personal use and operation as part of distributed radiation monitoring systems in the field.