Mathematical model of digital optoelectronic spectrum analyzer

Kolobrodov, Valentin G.; Тимчик, Григорій Семенович; Kolobrodov, M. S.

doi:10.20535/radap.2016.67.71-76

Cited by 2 publications

(2 citation statements)

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“…At the same time the signal Стр sets to a single state the flag of readiness (Flag) which signals the accumulator ACC of the microprocessor CPU on completion of measurements and start of transmission of measurement information temporarily stored in the buffer ports KA and KB of the PPI. Upon completion of the signal Стр (on its trailing edge) the shaper F 2 at its output generates a short pulse Res, which on the R-inputs resets all the triggers of the binary counter СТ2, and thus "prepares" it for the next cycle of measurements [1,4,5].…”

Section: 𝜔𝑧mentioning

confidence: 99%

Features of the Angular Speed Dynamic Measurements With the Use of an Encoder

Kukharchuk

Wójcik

Pavlov

et al. 2022

IAPGOS

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Based on the most significant features of the angular velocity dynamic measurements selected by the authors, the main phases of measuring information transformation were established, which allowed to obtain new mathematical models in the form of transformation function, equations for estimating quantization errors, analytical dependences for measuring range that are initial for modeling physical processes occurring in such digital measuring channels with microprocessor control. The process of converting an analog quantity into a binary code is analytically described, an equation for estimating the absolute and relative quantization error is obtained and a measurement range is established, which provides a normalized value of relative quantization error for angular velocity measuring channels with encoder. For the first time, the equation of sampling error was obtained, and it was proved that the limiting factor of the angular velocity measurements upper limit is not only the normalized value of quantization error, as previously thought, but also the value of sampling frequency fD. Therefore, to expand the measurement range (by increasing the upper limit of measurement), it is proposed not only to increase the speed of analog-to-digital conversion hardware, but also to reduce the execution time of software drivers for transmitting measurement information to RAM of microprocessor system. For this purpose, the analytical dependences of estimating the upper limit of measurement based on the value of the sampling step for different modes of measurement information transmission are obtained. The practical implementation of the software mode measurement information transmission is characterized by a minimum of hardware costs and maximum execution time of the software driver, which explains its low speed, and therefore provides a minimum value of the upper limit measurement. In the interrupt mode, the upper limit value of the angular velocity measurement is higher than in the program mode due to the reduction of the software driver’s execution time (tFl = 0). The maximum value of the angular velocity measurements upper limit can be achieved using the measurement information transmission in the mode of direct access to memory (DMA) by providing maximum speed in this mode (tFl = 0, tDR = 0). In addition, the application of the results obtained in the work allows at the design stage (during physical and mathematical modeling) to assess the basic metrological characteristics of the measuring channel, aimed at reducing the development time and debugging of hardware, software, and standardization of their metrological characteristics.

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Section: 𝜔𝑧mentioning

confidence: 99%

Features of the Angular Speed Dynamic Measurements With the Use of an Encoder

Kukharchuk

Wójcik

Pavlov

et al. 2022

IAPGOS

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“…Polarization devices are widely used in high-precision measuring systems, coherent optical systems of various purposes, etc. 1,2,3,4 . The main element in such systems is polarizer that convert natural radiation into linear polarized radiation.…”

Section: Introductionmentioning

confidence: 99%

Technology of infrared radiation polarizer

Kolobrodov

Tymchik

Mykytenko

et al. 2020

Optical Fibers and Their Applications 2020

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Among the various characteristics of infrared radiation, the degree of polarization is not often used in radiation analysis. The main reason is that polarization is less informative characteristic compared to others for most practical tasks. Also obtaining polarized radiation in infrared spectrum is relative complex and expensive act. In some cases, such as remote sensing, the improvement of spatial, radiometric and spectral resolution approaches it's physical limit. It becomes relevant to obtain additional information of a different nature, such as polarization information. Modern infrared radiation polarizers based on diffraction gratings are quite expensive. The article explores the possibility of creating infrared polarizers based on a planeparallel plate, to which radiation falls at an Brewster angle. It is shown that the polarizer operating on transmittance will be more efficient than reflecting radiation polarizer, since it does not deviate the optical axis by a significant angle. Such a polarizer provides a polarization degree of 90% and a transmittance of about 50%.

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Mathematical model of digital optoelectronic spectrum analyzer

Cited by 2 publications

References 0 publications

Features of the Angular Speed Dynamic Measurements With the Use of an Encoder

Features of the Angular Speed Dynamic Measurements With the Use of an Encoder

Technology of infrared radiation polarizer

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