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The paper presents a method of reducing the matrix that keeps the distance which went ultrasound and an data processing algorithm for the phased array system using MatLab. Cut of the control object for the phased array containing of 16 sensors is presented. Also The paper presents an example of practical realization of the algorithm on an FPGA using the program Quartus II.
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...
The paper describes a mathematical simulation of the acoustic signals. The propagation of signals in waveguides of circular section is simulated. For the analysis a linear model of ultrasound propagation is used. The purpose of mathematical modeling is accuracy increasing of distance measurement by acoustic methods.
The authors of the paper present a method for constructing of the models of microwave frequency synthesizer section for a fixed frequency as a control object for the purpose of further development of AGC system. The static and dynamic characteristics of the control object have been studied. The authors have determine the coefficients of static characteristics of transmission controlled attenuator...
The paper presents a new method to determine the temporal position of the received signal and the description of the mathematical apparatus method. The result of the research indicates the dependence of measurement error from the distance between the transmitter and the reflector. It is also demonstrated a comparison of the tested method with the single comparator method. Besides, according to graph...
The device intended for measurement of depth of hole is described, the block diagram of the device is depicted, as well as the new method of processing echo-signals is offered and analyzed to reduce measurement error.
One of the main stages of production process in manufacturing articles is thermic processing. Quality control of thermal processing consists in hardness measurement. For hardness measurement methods of Brinnel (SS 9012 - 50), Rockwell (SS 9013 - 59), Vikkers (SS 9013 - 59) et al are used. They are based on different methods of static and dynamic effect on the surface of the tested body that is metal...
"Termotest" is a new device developed for nondestructive control, where thermal electromotive force method is used. Functioning of a circuit is based on the fundamental property of electrical thermometry: "Electromotive force of a circuit, consisting of several different conductors, depends only on the temperature of soldered joints and doesn't depend on thermal gradient along conductors".
The suggested diagnosing method of pathologies in human body mild structures is based on the usage of the device that uses so-called time-shadowed method, based on registering of propagation speed changes, caused by differences in interstitial structures, having pathology. In this method the ultrasonic speed in a human body is registered. For the experimental realization a special device was developed...
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