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Electronic thermometer and humidity meter
Lapáček, Petr ; Chmelař, Milan (referee) ; Lattenberg, Ivo (advisor)
This master´s thesis deals with the design of measuring station used for the temperature and humidity measurement. There is a theoretical basical description of sensores for temperature and humidity measurement in the first part. Furthermore I deal with a theoretical design of measuring system, especially with types of materials and possibilities of communication between these parts. The main part of thesis is about communication on buses I2C,UART, SPI, RS485. There is a description of function procedure of particular integrated circuit, moduluses which are used in task in the next part of thesis.In the practical part I was engaged in a functional design of autonomous system for the temperature and ralative humidity measurement. Data could be presented by the computer after connection with the station. There is a description of testing the particular circuits and the full description of function particular blocks of system in the task. I have used the program called Eagle for schemes and printed wirings designing. The copy is placed on CD ready for next using. In the last part of thesis is a brief description of program algorithm "Meteostanice", which I have created for data presentation. There is an illustration of measuring results in these last part. The task is completely ready for the realization of autonomous system of weather station with its own memory.
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Network with capacitor microphone using FM modulation
Lapáček, Petr ; Říha, Kamil (referee) ; Káňa, Ladislav (advisor)
In bachelor's thesis I was interested in quality of the electrostatic transducer. I have described a theoretic pieces of knowledges in parts of FM modulations and the variables crystals oscillators. I have tried to propose a conception of the condenser mikrophone in the high-frequency circuit where one of the main part was the crystal oscillator, which part was the capacitor transducer, in capacity element representative uncertain capacities. By this way I have tried to create the modulator, whose modulation depend on the actual changes of capacities in the electrostatic changers. Finally I have interested in the demodulation in this way of creating the HF signal by the help of detection unit TDA7000 and likewise setup of integrated circuit.
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Network with capacitor microphone using FM modulation
Lapáček, Petr ; Říha, Kamil (referee) ; Káňa, Ladislav (advisor)
In bachelor's thesis I was interested in quality of the electrostatic transducer. I have described a theoretic pieces of knowledges in parts of FM modulations and the variables crystals oscillators. I have tried to propose a conception of the condenser mikrophone in the high-frequency circuit where one of the main part was the crystal oscillator, which part was the capacitor transducer, in capacity element representative uncertain capacities. By this way I have tried to create the modulator, whose modulation depend on the actual changes of capacities in the electrostatic changers. Finally I have interested in the demodulation in this way of creating the HF signal by the help of detection unit TDA7000 and likewise setup of integrated circuit.
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|
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Electronic thermometer and humidity meter
Lapáček, Petr ; Chmelař, Milan (referee) ; Lattenberg, Ivo (advisor)
This master´s thesis deals with the design of measuring station used for the temperature and humidity measurement. There is a theoretical basical description of sensores for temperature and humidity measurement in the first part. Furthermore I deal with a theoretical design of measuring system, especially with types of materials and possibilities of communication between these parts. The main part of thesis is about communication on buses I2C,UART, SPI, RS485. There is a description of function procedure of particular integrated circuit, moduluses which are used in task in the next part of thesis.In the practical part I was engaged in a functional design of autonomous system for the temperature and ralative humidity measurement. Data could be presented by the computer after connection with the station. There is a description of testing the particular circuits and the full description of function particular blocks of system in the task. I have used the program called Eagle for schemes and printed wirings designing. The copy is placed on CD ready for next using. In the last part of thesis is a brief description of program algorithm "Meteostanice", which I have created for data presentation. There is an illustration of measuring results in these last part. The task is completely ready for the realization of autonomous system of weather station with its own memory.
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