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In this paper the terrain electrical resistance tomograph was presented. Its aim is to verify the repeatability of test results by eliminating laboratory equipment, and to validate the use of simple and cheap electronics to the structure of the ERT. Electrical resistance tomography, which is based on measuring potential difference, can be used to calculate conductivity.
The article presents an idea of a production process control system. Advanced automation and control of production processes play a key role in maintaining competitiveness. The proposed solution consists of sensor networks for measurement process parameters, production resources and equipment state. The system uses wired and wireless communication, which gives possibility to acquisition data from...
The results of ultrasonic imaging with the aid of an algorithm with the virtual rays is presented in this paper. The signal associated with the virtual rays is calculated as an arithmetical mean value of the signals of the rays surrounding the virtual one. Developed algorithm was tested on synthetic free noise data then polluted synthetic data in order to move for the real measurements. Conclusions...
The boundary element method and the level set method can be used in order to solve the inverse problem for electric field. In this approach the adjoint equation arises in each iteration step. Results of the numerical calculations show that the boundary element method can be applied successfully to obtain approximate solution of the adjoint equation. The proposed solution algorithm is initialized by...
In this paper, we investigate the inverse problem for the electric field so-called copper mine problem. In general, this task assumes detection of all air gaps. Gaps are localised above ceiling in a copper mine. Such task can be considered as application of the electrical impedance tomography. In order to solve forward problem there was used the boundary element method or the finite element method...
System for navigation and localization inside buildings will determine man's location in confined spaces with level of accuracy never yet achieved. System's operation will be mainly based on Bluetooth signals in accordance with the Beacon standard. A worldwide innovation will be the use of Radio Tomographic Imaging (RTI). This technology will enable tracking of moving objects by image reconstruction...
This article presents the design of the device with active electrodes to examine the flood embankment. There was discussed the method of determining the conductivity. The presented solution was based on electrical impedance tomography. There was described the concept of active electrodes and measuring equipment for data acquisition. Electrical impedance tomography, which is based on measuring potential...
The article presents two elements associated with the practice of application of the boundary element method. The first is associated with BEM ability to analyze an open boundary objects and application of infinite boundary elements in the area of mammography. The second element is associated with the damped wall investigations. Wall humidity and moisture represents heterogeneous environment (Functionally...
Niniejsza praca zawiera przegląd dotychczas opracowanych układów regulacji prądu termoemisji elektronowej dla niskich energii elektronów wykorzystywanych w próżniowych przyrządach pomiarowych, między innymi, spektrometrach mas, próżniomierzach jonizacyjnych. W efekcie przeprowadzonej analizy zaproponowany został układ automatycznej regulacji prądu termoemisji elektronowej z cyfrowym, nieliniowym regulatorem...
The traditional Boundary Element Method (BEM) is a collection of numerical techniques for solving some partial differential equations. The classical BEM produces a fully populated coefficients matrix. With Galerkin Boundary Element Method (GBEM) is possible to produce a symmetric coefficients matrix. The Fourier BEM is a more general numerical approach. To calculate the final matrix coefficients it...
W artykule zaprezentowano połączenie metody elementów brzegowych i metody zbiorów poziomicowych w poszukiwaniu nieznanego kształtu w elektrycznej tomografii impedancyjnej. Pokazane zostało jak wyznaczyć prędkość na symulowanym brzegu, jak ją rozszerzyć i wykorzystać do przesunięcia brzegu jak również w jaki sposób reinicjować funkcję poziomicową, ostatecznie przedstawiono przykład identyfikujący trzy...
W pracy przedstawiono przegląd rozwiązań stosowanych w próżniomierzach jonizacyjnych i spektrometrach mas wykorzystujących strumień termoelektronów do jonizacji materii w postaci gazowej, w szczególności przykłady konstrukcji źródeł jonów oraz układów polaryzacji ich elektrod. Na podstawie wyników przeprowadzonej analizy zaproponowano nowy sposób detekcji prądu termoemisji elektronowej dla układów...
W pracy przedstawiono zastosowanie analizy izotopowej helu do poszukiwań miejsc dostępu źródeł energii geotermalnej. Opisano podstawy analizy izotopowej helu, spektrometr mas z gazowym źródłem jonów oraz kierunki dalszych prac.
The traditional Boundary Element Method (BEM) is a collection of numerical techniques for solving some partial differential equations. The classical BEM produces fully populated coefficients matrix. With Galerkin Boundary Element Method (GBEM) is possible to produce the symmetric coefficients matrix. The Fourier BEM is a more general numerical approach and allows to avoid problems with singular integrals...
W pracy przedstawiono zastosowanie biblioteki metody elementów brzegowych BEMLAB do rozwiązywania zagadnień zewnętrznych teorii pola elektromagnetycznego. Opracowano modyfikację funkcji Greena, pozwalającą na rozwiązywanie zgadnień dwuwymiarowych.
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