Bury, Marek

A method of sensing a water contamination in a fluid fuel under test with millimeter wave radiation, according to the invention comprises steps in which at least a part of a first resonance curve is measured in a resonator comprising reference fuel and at least a part of a second resonance curve is measured in a resonator comprising fuel under test and an assessment of the water contamination is based on comparison of the first and the second. The invention further concerns measurement setup for execution of a method according to the invention and computer program product which when run on the processing causes execution of the method according to the invention.

An energy generation module, comprising pressure transducer with at least one pressure-to-displacement converter (300) having a cavity (310) confined with a membrane (303) susceptible to deformation under pressure difference between fluid inside and outside the cavity (310), and at least one piezoelectric element mechanically coupled with the at least one pressure-to-displacement converter (300) for converting energy resulting from the movement caused by deformation of membrane to electrical energy, according to the invention further has electrical energy storage means connected to piezoelectric element, the cavity closed with membrane is airtight. The membrane is selected so that the pressure difference corresponds to range of daily atmospheric pressure changes. Piezoelectric element is coupled with a mechanical energy storage means accumulating mechanical energy of move of the membrane resulting from daily pressure changes. Piezoelectric element comprises plurality of spatially distributed piezoelectric elongated memberss engageable with at the least one pressure-to-displacement converter so that energy is released when pressure change since previous release exceeds predetermined value falling within a range (30 Pa, 80 Pa). The invention also concerns method of energy harvesting with module according to the invention.

A method of measuring refractive index of a liquid substance under test with a time-domain spectroscopy measurement system based on a propagation of radiation pulse through a container (140), wherein the radiation pulse is terahertz radiation pulse, and before main measurement step the substance under test is diluted with a known solvent of absorption lower than the absorption of the substance under test, to obtain a solution having absorption low enough to obtain a measureable transmitted terahertz radiation pulse then mixing rule is applied to determine the refractive index of the liquid substance under test.

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A computer implemented method for processing a frame sequence to generate an alarm when a dangerous object is being used including a frame acquisition (11) step, a division into sub-regions (12) step, object identification (13) step and decision making (14) step, in which alert generation (16) step is executed if decision made in decision making step (14) is positive. Division into sub-regions (12) step includes division of the frame into sub-regions that overlap and have minimal dimension of at least 100 pixels. Object identification step (13) is executed in sub-region by sub-region manner and includes processing a frame with a deep neural network trained to detect the dangerous object and returns probability of detection for sub-regions of the frame formed into probability map corresponding to the frame. Decision made in decision making (14) step is based on at least a first criterion and a second criterion applying to the subsequent frames and corresponding probability maps. The first criterion includes probability of detection within a predefined number N of subsequent frames being above predefined value of. The second criterion includes the minimal distance between sub-regions in which probability of detection above predefined value ofwas observed in subsequent frames being lower than given value

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Zusammenfassung wird geladen …

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