| α energy spectrum data measured instrument is one of the important tools of radioactivity matter inspection. The thesis aims at developing tendency of α energy spectrum data measured instrument in china and in abroad, combining the characteristics of fieldwork, it aims at importantly studying a few key problems of instrument. Focusing on stress research on some key techniques, such as how to pick out a energy spectrum detector, how to design the prefix magnifying circuit, how to design Multi-Channel Analyzer (MCA) and apparatus, how to cerate the MCU to become the operation table of system and how to design the system software and so on, the sensor adopts the gold-silicon rampart semiconductor detector ,the instrument adopts SST89C58 as main controlling core, the system picks out high speed and low power ADCs (Analog-to-Digital Converters) CMOS chip MAX191 to form the A/D circuit, the RS-232 chip is been by way of the joint of serial communication, the semiconductor diode is one of the buildup components of keyboard, and 320x240 matrix graphic LCD (Liquid Crystal Display) is adopted the display in system. In order to the intercommunion of human and instrument, exploit the systemic software. The software system is compiled by the advanced C Language and Assemble Language. The software system makes use of merit of each fully, which make it can do well in either timely handling or handling data expediently. The graphics interface of the software system is very beautiful, the manipulation of the software system is very convenience and the software can display the full spectrometry obtained from MCA.According to the primary performance test, the system has implemented the expect design goal, which provides the condition that α energy spectrum data measured instrument is spread or applied. |
