State of the art measurement technologies have many requirementes. The measurement units and sensors must produce precise results in high quantities, furthermore the user must receive this data in accessible form. The measuring principles are well established, however user demands are changing constantly. This shows a need for constant development as well.
In this thesis work a specification and development flow of a microcontroller based control unit is presented step-by-step. During the semester I also got acquainted with the software development tools. I have made basic programming and function testing on the developed hardware.
In the introduction the root of the problem is defined and the topic of interest is placed in the specific scientific areas. The topic of dosimetry and other involved notions of the topic are introduced. Afterwards the basic hardware is presented with in-depth description of PIC microcontrollers from both hardware and software side. PICkitTM 2 programming device and related software development tool was used and introduced. The referring design rules are important part of the schematic and layout design. The design of the schematic and the motivation for part selection is also discussed. The circuit was assembled, the basic functions were tested with customized sample codes. During prototyping the small design flaws of the hardware were corrected. USB communication and LCD control was implemented with the help of Microchip design guides. Further code parts of the software are exceeding the limits of this paper. The topic can be carried forward for later MSc Project work. Future work will cover the coding of digital analog conversion, the automated curve fitting for given measurement points and finally the concluding menu system.
The work was helped by the fellow workers of Sensolab Kft. and the Hungarian Academy of Sciences, Institute of Isotopes.