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Firmware for a pressure sensor with HART interfacel
Čožík, Ondřej ; Štohl, Radek (referee) ; Fiedler, Petr (advisor)
The bachelor thesis deals with draft of firmware for a capacitive sensor with HART communication protocol. At first, it briefly describes the HART protocol (principles of communication, frame structure and connectivity devices on the HART bus). Subsequently attention is paid to capacitive sensor description, method of data processing and communication method of the sensor with HART interface. The final part depicts individual parts of the firmware for the capacitive sensor (such as the method of values reading from A/D converter, data reading/writing from/to external or internal EEPROM or calculation of the measured pressure value, its temperature compensation and corresponding current loop, using D/A converter.
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Loop Powered Field Instrument with HART Interface
Kunz, Jan ; Havránek, Zdeněk (referee) ; Beneš, Petr (advisor)
This diploma thesis describes design and development of creating field instrument demonstration kit. Kit is capable of measuring multiple sensors such as thermocouples, RTDs, or pressure sensors, analogue sensor simulation is also provided. Sensor’s side is isolated from output, which is composed of 4 - 20 mA current loop and HART interface. Current loop also provides power supply and kit can communicate via HART also when alarm current (3,2 mA) is set. Basic safety features like open wire detection, over and undervoltage protection are also implemented.
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Communication & Man-Machine Interface for industrial sensors
Marcoň, Petr ; Fedra, Zbyněk (referee) ; Frýza, Tomáš (advisor)
This thesis describes the possibilities of local and remote sensors configuration. Summary overview of the most common Fieldbus and protocols for remote configuration is performed. The focus is mainly dedicated to the HART protocol that is analyzed from the physical layer to the application layer. Circuit diagram and printed circuit board (PCB) of smart sensor with thermistor probe Pt1000 was designed. The HART protocol allows the smart sensor parameters setting as well. The functionality of remote configuration was tested in HARTWinConf program. The control elements for local sensor configuration, such as buttons, matrix keyboards and touchscreens, are described in the following chapter. Representation of the measurement values on display module is introduced too. The most important parameters and aspect of character LCD, graphics LCD and OLED displays are described in greater details. The DD12864YO-3A OLED display was selected to use with designed temperature smart sensor module. The display shows the loop current, the percentage of current range and the primary value - temperature. As the last step the EMI and EMS tests for all modules were performed.
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WirelessHART sensor node
Řežucha, Tomáš ; Dřínovský, Jiří (referee) ; Götthans, Tomáš (advisor)
The master’s thesis is focused on building WirelessHART node demo and on a description of WirelessHART standard, which is used in wireless sensor networks. Out of the comprehensive WirelessHART specifications firstly, the two lowest layers of OSI networking model are described: physical and data link layer. Secondly, burst mode and device variables are described to provide necessary information for data publishing in the network. The mote is assembled according to hardware and software requirements of WirelessHART demo system. The node is complemented by its firmware and PC application demonstrating its features in a user-friendly manner.
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Field Instrument with HART Interface
Kunz, Jan
This paper describes design and development of of creating field instrument demonstration module. Module is capable of measuring multiple sensors such as thermocouples, RTD, or pressure sensor, analogue sensor simulation is also provided. Sensor’s side is isolated from output, which is composed of 4 - 20 mA current loop and HART interface. Current loop also provides power supply and module can communicate via HART also when alarm current (3,2 mA) is set. Basic safety features like open wire detection, over and undervoltage protection are also implemented.
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WirelessHART sensor node
Řežucha, Tomáš ; Dřínovský, Jiří (referee) ; Götthans, Tomáš (advisor)
The master’s thesis is focused on building WirelessHART node demo and on a description of WirelessHART standard, which is used in wireless sensor networks. Out of the comprehensive WirelessHART specifications firstly, the two lowest layers of OSI networking model are described: physical and data link layer. Secondly, burst mode and device variables are described to provide necessary information for data publishing in the network. The mote is assembled according to hardware and software requirements of WirelessHART demo system. The node is complemented by its firmware and PC application demonstrating its features in a user-friendly manner.
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|
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Loop Powered Field Instrument with HART Interface
Kunz, Jan ; Havránek, Zdeněk (referee) ; Beneš, Petr (advisor)
This diploma thesis describes design and development of creating field instrument demonstration kit. Kit is capable of measuring multiple sensors such as thermocouples, RTDs, or pressure sensors, analogue sensor simulation is also provided. Sensor’s side is isolated from output, which is composed of 4 - 20 mA current loop and HART interface. Current loop also provides power supply and kit can communicate via HART also when alarm current (3,2 mA) is set. Basic safety features like open wire detection, over and undervoltage protection are also implemented.
|
|
|
Firmware for a pressure sensor with HART interfacel
Čožík, Ondřej ; Štohl, Radek (referee) ; Fiedler, Petr (advisor)
The bachelor thesis deals with draft of firmware for a capacitive sensor with HART communication protocol. At first, it briefly describes the HART protocol (principles of communication, frame structure and connectivity devices on the HART bus). Subsequently attention is paid to capacitive sensor description, method of data processing and communication method of the sensor with HART interface. The final part depicts individual parts of the firmware for the capacitive sensor (such as the method of values reading from A/D converter, data reading/writing from/to external or internal EEPROM or calculation of the measured pressure value, its temperature compensation and corresponding current loop, using D/A converter.
|
|
|
Communication & Man-Machine Interface for industrial sensors
Marcoň, Petr ; Fedra, Zbyněk (referee) ; Frýza, Tomáš (advisor)
This thesis describes the possibilities of local and remote sensors configuration. Summary overview of the most common Fieldbus and protocols for remote configuration is performed. The focus is mainly dedicated to the HART protocol that is analyzed from the physical layer to the application layer. Circuit diagram and printed circuit board (PCB) of smart sensor with thermistor probe Pt1000 was designed. The HART protocol allows the smart sensor parameters setting as well. The functionality of remote configuration was tested in HARTWinConf program. The control elements for local sensor configuration, such as buttons, matrix keyboards and touchscreens, are described in the following chapter. Representation of the measurement values on display module is introduced too. The most important parameters and aspect of character LCD, graphics LCD and OLED displays are described in greater details. The DD12864YO-3A OLED display was selected to use with designed temperature smart sensor module. The display shows the loop current, the percentage of current range and the primary value - temperature. As the last step the EMI and EMS tests for all modules were performed.
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