Olesya A. Kozhemyak

System for automatic sorting of pallets

The paper presents the unique system for automatic sorting of pallets. System has tree units: sensor unit, electronic unit and PC. System can detect defect, slope of pallet surface or foreign object on the pallet surface. The description of the user interface and the testing results of the pallet are presented. The calculated values are compared with a normalized value and if a deviation is beyond the tolerance, the pallet is rejected. The software allows you to display results in the form of 3D images of the surface of the pallet for visual observation by the operator on the display.

Control system for device «Thermotest»

The article describes the original algorithm for control the process of measuring thermo electromotive force. Proposed algorithm allows minimizing the effect of destabilizing factors at the manual testing of metals and alloys. It was proposed to take measurements at a time point when the supply voltage is zero, as well during the pause of PWM voltage of heating and at zero value of contact resistance between the electrodes and testing sample. The control algorithm provides sampling only valid data based on the above criteria, as well, data averaging and indication.

Software-hardware system for measurement of the pallet dimensions

The article presents a hardware and software complex for the automated measurement of the pallet dimensions and defining of foreign bodies on the pallet surface. The block diagram of the system and the software are described. Methods to improve the accuracy of measurement of the geometric dimensions of the pallet are briefly described: temperature correction of the velocity of propagation of ultrasonic oscillations and the calculation of echo pulse envelope to determine its coordinates of time-position. The algorithm of processing the primary data to improve the reliability of inspection results on the basis of the calculation of the additional, so-called virtual lines, in the pallet surface is presented.

Ultrasonic level gauge of light oil

The article describes the ultrasonic level gauge of light oil. The principle of error compensation caused by instability of propagation conditions due to the presence of a temperature gradient and density along the propagation path of an ultrasonic wave is presented. The acoustic path of the level gauge is described and includes three channels: a measuring channel, a reference channel and a channel for measuring the bottom water level. The use of data from the reference channel made it possible to obtain high metrological characteristics over a wide range of temperatures and to exclude dependence on changes in the density of light oil products.

Penicilliform anthropomorphic manipulator

In the article a description of robot-equipped manipulator functionally and outwardly similar with human hand is introduced.

High-frequency trigger generators for CuBr-laser high voltage pumping source

In this paper the circuits of high frequency trigger generators of pulses of the nanosecond duration are presented. A detailed study of a generator based on the avalanche transistor with the use of a coaxial cable instead of a capacitor is described. This circuit showed advanced characteristics of the output pulses. A circuit of a generator built on high-speed digital components is also considered. The basic advantages and disadvantages of both generators are presented in this paper.

Hardware-software complex for studying of digital filters

This work describes the hardware-software complex that is used in educational process for students of technical specialties to study the principles of design and software implementation of digital filters. Paper describes a programming part of the complex which allows calculating the coefficients of different digital filters. The possibility to transfer these coefficients to the microcontroller using UART interface is presented. The hardware part of the complex is presented by signal generators with different shape of signals (triangle signal with variable frequency, sinusoidal signal with variable frequency, sinusoidal signal with addition of noise). Experimental results of practical implementation of designed complex using STM32F4DISCOVERY board based on STM32F407 microcontroller are shown in the paper.

Modelling of the thermal field of hot electrode and the controlled sample at thermoelectric testing of metals

The article presents the results of simulation of the temperatures of hot electrode and controlled sample during measuring the thermoelectric performance of metals and alloys. The temperature dynamics in the contact zone with the planar and point contacts between the hot electrode and the controlled sample is presented in the paper. The influence of the temperature dynamics on thermo electromotive force is shown. Simulation was carried out for two hot electrodes made of copper and aluminum. Controlled sample was made of steel ST3 (analogue of A57036).

Control system for Peltier element air dryer

In this work control system for Peltier element air dryer is shown. The block diagram of an air dryer and schematic diagram of a control system are presented.

Simulation of the power supply for CuBr-laser with magnetic compression cell in LTspice

Development of effective sources of specific radiation is a very urgent task. Copper vapor lasers allow obtaining sufficiently high lasing power in the visible region of the spectrum. To increase the competitiveness of such laser it is necessary to develop an effective pumping source. This problem demands to develop a power supply that provides high voltage pump pulses with sufficiently high rise time. In this connection it is interesting to use the switch in conjunction with magnetic compression circuits. This will allow reducing rate of change of the voltage across the switch providing high rate of change of one across the tube.