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Ultrasonic eraser of tartar
Novotný, Jan ; Dlouhý, Jiří (referee) ; Rozman, Jiří (advisor)
The aim of this thesis is to provide insight into certain elementary methods of removing tooth stone. Also, the thesis aims to introduce different techniques of removing tooth stone. The first part of the work analyses the theory of rise tooth stone, his create and biologically effect. Further, the elementary methods of removing tooth stone by ultrasound are introduced. In the second part, the thesis analyses the concept of instrument to removing tooth stone by ultrasound. The aim of this thesis is for working frequency 27 kHz propose circuit diagram of exciter generator. For intensity ultrasound 6W/cm2 count parameters sandwich converter and waveguide.
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The Propagation of Electromagnetic Field Inside the Human Tissue
Dostálová, Petra ; Čech, Petr (referee) ; Dlouhý, Jiří (advisor)
This bachelor thesis focuses on the basics of the electromagnetic field diffusion. It describes principle of the finite element method, simulation of the diffusion of the electromagnetic field of the horn antenna and influence of this field on human tissue in COMSOL Multiphysic. Furthermore, it also deals with the calculation of specific absorption rate performance and a comparison of calculated values with the maximum value allowed by ICNIRP SAR.
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Ultrasound blood flow detector
Kameníček, Robert ; Dlouhý, Jiří (referee) ; Rozman, Jiří (advisor)
My master’s thesis deals with methods of measuring the ultrasonic blood flow blood vessel with a detailed focus on Doppler ultrasound systems, which find application in the diagnosis of superficial vascular and obstetrics. The thesis is described a proposal indicating polydirectional Doppler system with a continuous carrier wave frequency of 4 MHz, the intensity of ultrasound 100 mW/cm2 and diameter D-shaped transducers 8 mm. As a result, the indicator will be able to measure blood flow velocity in the range of 5-40 cm/s, which appears to 3.5 digit display. After describing important theoretical assumptions, the work pays block diagram indicator. Furthermore, it examines the various functional blocks on the requirements imposed on them. It looks at the options of each functional block, and finally describes the implementation of the selected option and including peripheral solutions. Great attention is paid to the power of the indicator, where the power supply will be used 9 V battery. Create a symmetric voltage for operate amplifier and other auxiliary voltage will procure DC/DC converters. In conclusion, the work is located around the perimeter solutions indicator. The following draft for the production of double-sided PCB, its installation and a list of elements. The outcome of the thesis is complete documentation for the implementation of an indicator of blood flow, which allows us to obtain information on throughput vessels, especially the lower and upper limbs.
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Intelligent Tepmperature Sensors Application
Bohutínský, Jaroslav ; Dlouhý, Jiří (referee) ; Čížek, Martin (advisor)
The aim of this study was to acquaint with smart temperature sensors from different producers and to study their properties. The following step was to choose a suitable temperature sensor and a microcontroller (MCU) for measuring and temperature processing. On the market there are products from different firms such as Analog Devices, Microchip, Dallas, Maxim, National Semiconductor, Texas Instruments, Smartec etc. All those firms offer not only temperature sensors, but also microcontrollers. Every producer has its own realization of the inter-sensors communication. In this study there are introduced a wiring diagram of a microcontroller driven module for a temperature measuring making use of a smart temperature sensor and also designs of printed circuit boards.
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Measurement of movement on the heart
Soukup, Tomáš ; Dlouhý, Jiří (referee) ; Švrček, Martin (advisor)
This bachelor´s thesis is described measurement of movement on the heart. System is composed by microcontroller Freescale MC68HC908GP32 and accelerometer Freescale MMA2260D. The microcontroller is direct element of application. The accelerometer is scanner of movement, whitch increases movement to direct microcontroller. The microcontroller depicts of measurement of moment in the display. Repeated measuremented movement is return depicts in the display, over direct microcontroller.
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Image recording by video camera (PAL)
Tomaštík, Roman ; Dlouhý, Jiří (referee) ; Švrček, Martin (advisor)
The main topic of this work is focused on a connection of a camera with PC and processing of the gained pictures. There are described basic concepts of image processing and coding standards of the color signal. Attention is devoted mainly to PAL system, which is used by our camera. Furthermore, there are summarized and described the basic methods for image processing (thresholding, averaging, convolution, etc.). These methods are also used for the detection of the fundamental position of the eyes. This detection is designed to be the most universal and applicable on the various images obtained.
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MEMS Technology for Tilt Sensing
Kopeček, Pavel ; Čížek, Martin (referee) ; Dlouhý, Jiří (advisor)
Recently we put more requirements on the equipment around us. And very often we need know, how hung angle-wise of equipment is. Measuring of tilt is very important and used for example in gaming consoles, mobile phone, medical purposes and other. Tilt is calculated per direction of gravity acceleration, it measures by accelerometers. Accelerometer is sensor, which exploit masses inertia to calculate of acceleration. Development put pressure to us and reason is miniaturizing of everything and there is possibility to use micro-electromechanical, so-called MEMS, accelerometers. At last time sensors made by MEMS technology replacing classical mechanic sensors, which is bigger, more power exacting and last time considerably more expensive. But parts makes by MEMS technology aren’t enough accurate for some applications. Despite it is by this principle manufactured much kinds of accelerometers with different technologies of manufacture and work on different principles. We try to compare two accelerometers from two competitive factories.
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Ultrasound blood flow detector
Vožda, Michal ; Dlouhý, Jiří (referee) ; Rozman, Jiří (advisor)
This work deals with Doppler methods of measuring blood flow in blood vessels and a simple design with a continuous wave for the 4 MHz frequency and intensity of ultrasound 100 mW/cm2. The work contains a description of the functional blocks and design of their involvement. Individual blocks are simulated in PSpice. The resulting circuit is a printed circuit board and a 3D model of the plate fitted in EAGLE.
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Developmental kit width AVR microcontrollers
Dostál, František ; Čížek, Martin (referee) ; Dlouhý, Jiří (advisor)
The topic of my bachelor´s thesis is the implementation of development kit with AVR ATmega16 processor and creation a simple program to verify the functionality of all the peripherals. Part of the solution is the JTAG programmer. Programs are developed in C language and tested with all necessary peripherals microcontroller, timer / counters, A/D converter, ports, USART unit. Also there were programms developed, that ensure scanning the keyboard matrix, LED lighting, crystal transducer activation, measurement using tilt sensors ADXL 330, communication with the LCD and easy connection to a mobile phone.
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