Capacitive Sensing: Water Level Application
Nguyen, Thao (2016)
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2016060311714
https://urn.fi/URN:NBN:fi:amk-2016060311714
Tiivistelmä
In this thesis, the application of capacitive sensing technology in liquid level monitoring will be analyzed specifically. Applying the related techniques to design a sensor port of high sensitivity is the target which allows a high accuracy and reliability of measurement. The project involves improving the quality of the control signal by the capacitive sensor, which is demanded with several particular specifications in practice of a commercial product’s design requirements. Therefore, the practicability of the project makes this paper being considered as a more applicable than theoretical document of technical research.
The implementation was taken advantage of approaches and methods. A wide source for a literature review was exploited for information collection of advanced capacitance calculation theory and existing applications of liquid level capacitive sensing. Expert and professional discussions were conducted on a regular basis of meetings with the instructors and the engineer team. Practical labs were substantially carried out for simulating and prototyping the sensor with computer-aid design programs and lab devices at school or company. Test codes were written in the online compiler - an integrated development environment on ARM mbed developer site.
The work results in digging deeper into the understanding of capacitive sensing, capacitance to digital conversion and their applications in water level tracking. Furthermore, it is satisfactory with a complete product of the sensor port, the sufficient accuracy of measurements and the first skills learned from designing a flexible printed circuit. Overall, the practice of the training process is fulfilled and preparatory for the valuable working experience and techniques of electronic systems designing and embedded systems programming in a coming future of a graduate in Electronics Engineering.
To sum up, this document can be used as an application note of advanced capacitive sensing technology for tracking the height level of any light viscosity fluid in a symmetrical shaped reservoir. The specifications of capacitance to digital converter FDC1004 with inter-integrated circuit data transfer are also sharpened as a beneficial reference for a broad range of different applications using this capacitive sensing technology.
The implementation was taken advantage of approaches and methods. A wide source for a literature review was exploited for information collection of advanced capacitance calculation theory and existing applications of liquid level capacitive sensing. Expert and professional discussions were conducted on a regular basis of meetings with the instructors and the engineer team. Practical labs were substantially carried out for simulating and prototyping the sensor with computer-aid design programs and lab devices at school or company. Test codes were written in the online compiler - an integrated development environment on ARM mbed developer site.
The work results in digging deeper into the understanding of capacitive sensing, capacitance to digital conversion and their applications in water level tracking. Furthermore, it is satisfactory with a complete product of the sensor port, the sufficient accuracy of measurements and the first skills learned from designing a flexible printed circuit. Overall, the practice of the training process is fulfilled and preparatory for the valuable working experience and techniques of electronic systems designing and embedded systems programming in a coming future of a graduate in Electronics Engineering.
To sum up, this document can be used as an application note of advanced capacitive sensing technology for tracking the height level of any light viscosity fluid in a symmetrical shaped reservoir. The specifications of capacitance to digital converter FDC1004 with inter-integrated circuit data transfer are also sharpened as a beneficial reference for a broad range of different applications using this capacitive sensing technology.