scholarly journals New Vision Sensor to Measure Gas Pressure

2015 ◽  
Vol 15 (3) ◽  
pp. 132-138 ◽  
Author(s):  
Krzysztof Murawski
Keyword(s):  
Image Processing ◽  
Characteristic Feature ◽  
Laboratory Tests ◽  
Gas Pressure ◽  
Measuring Apparatus ◽  
Vision Sensor ◽  
Measuring Device ◽  
New Vision ◽  
Video Sensor ◽  
Linear Nature

Abstract The paper presents the construction and operation of a video sensor developed for video-manometer. In the publication the use of video-manometer for measuring gas pressure is presented. A characteristic feature of the device is pressure measurement based on diaphragm deformation and digital image processing. Presented measuring technique eliminates restrictions in the construction of the measuring apparatus arising from non-linear nature of diaphragm deformation. It also allows performing measurements of gas pressure, also of explosive gas, providing galvanic isolation between the factor measured and the measuring device. The paper presents the results of video-manometer calibration and measurements taken during the laboratory tests. It has been shown that the developed video-manometer, that is equipped with a flat silicone diaphragm, allows measuring the gas pressure in the range of 0 – 100 mbar with an error less than 2 %. In the experiments the CO2 pressure was measured.

A THERMISTOR HYPSOMETER

1959 ◽  
Vol 37 (12) ◽  
pp. 1331-1338
Author(s):  
W. R. Blackmore
Keyword(s):  
Pressure Measurement ◽  
Pressure Fluctuations ◽  
Gas Pressure ◽  
Measuring Device ◽  
Boiling Liquid ◽  
Short Period ◽  
Pressure Measuring Device

A thermistor hypsometer used as a sensitive, recording, gas-pressure measuring device is described. It is shown that the limitation on this device is the noise introduced by the pressure fluctuations over the surface of the boiling liquid. These fluctuations are about ±(5–10) μ(microns) Hg peak-to-peak. When a pressure measurement is averaged over a moderately short period of time it may be estimated to ± 1 μHg.

Limitations Imposed on Land Properties Resulting from the Construction and Exploitation of Transmission Devices in Poland

2017 ◽  
Author(s):  
Natalia Sajnóg ◽  
Katarzyna Sobolewska-Mikulska
Keyword(s):  
Economic Development ◽  
Characteristic Feature ◽  
Land Development ◽  
The Third ◽  
Third Stage ◽  
Social And Economic Development ◽  
Actual Use ◽  
Investment Process ◽  
Implementation Stage ◽  
Linear Nature

Sustainable social and economic development of the country, as well as the need to ensure its energy safety requiresthe modernisation of the existing and construction of new transmission devices. The characteristic feature of technical infrastructure is its linear nature, i.e. its course through numerous real estates, resulting in limitations imposed on such properties. The limitations differ depending on the stage of the investment process. Such stages include the formal legal stage (designing and collecting appropriate permits and decisions), the investment implementation stage, and the stage of exploitation of transmission devices. Within the first stage, a limitation concerning land development may occur (location of investments in planning documents); limitations of the use of land properties always occur in this case (acquisition of a legal title to the land property disposal for building purposes). At the stage of construction, i.e. the investment implementation, limitations related to the deterioration of the use of the land property may appear. The third stage may involve limitations connected with the presence of transmission devices in the space of the land property, i.e. limitations which result from the actual use of the land property by the transmission company. The objective of this paper is to identify limitations imposed on land properties resulting from the construction and exploitation of transmission infrastructure in Poland.

NON-SEPARABLE 2D BIORTHOGONAL WAVELETS WITH TWO-ROW FILTERS

2005 ◽  
Vol 03 (01) ◽  
pp. 1-18 ◽  
Author(s):  
YINWEI ZHAN ◽  
HENK J. A. M. HEIJMANS
Keyword(s):  
Image Processing ◽  
Characteristic Feature ◽  
Tensor Product ◽  
Wavelet Transforms ◽  
Lifting Scheme ◽  
Efficient Implementation ◽  
Biorthogonal Wavelets ◽  
Compactly Supported

In the literature 2D (or bivariate) wavelets are usually constructed as a tensor product of 1D wavelets. Such wavelets are called separable. However, there are various applications, e.g. in image processing, for which non-separable 2D wavelets are prefered. In this paper, we investigate the class of compactly supported orthonormal 2D wavelets that was introduced by Belogay and Wang.2 A characteristic feature of this class of wavelets is that the support of the corresponding filter comprises only two rows. We are concerned with the biorthogonal extension of this kind of wavelets. It turns out that the 2D wavelets in this class are intimately related to some underlying 1D wavelet. We explore this relation in detail, and we explain how the 2D wavelet transforms can be realized by means of a lifting scheme, thus allowing an efficient implementation. We also describe an easy way to construct wavelets with more rows and shorter columns.

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