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Halves radon chamber, through the gold-silicon surface barrier detector measurement of alpha particles, and how to follow-up circuit structure can be effective to obtain spectral measurement data with the total amount of measurement data, as well as the environment of the radon chamber temperature, humidity, how can simple, accurate measurement of radon chamber data acquisition system, one of the important research topic. With the rapid development of electronic technology and new outcomes constant introduction of computer technology, the high level of integration with computerized devices are used in the electronic circuit of the data acquisition system, the acquisition system performance are maturing, as well as data acquisition system for radon chamber computer, intelligence, provided the necessary conditions. By the study based on a variety of other nuclear detector hardware circuit structure and software functions, to learn and to learn from past research and experience, papers to be able to accurately alpha particle measurement data, temperature, and humidity measurement data for the purpose from the circuit performance, integration, simple and good value for money, the focus on the implementation of a data acquisition system circuit. Compared with other the nuclear measurement data acquisition system, the paper mainly has the following characteristics: (1) the temperature, humidity measurements into one with I ~ 2C bus digital interface with CRC (cyclic redundancy checksum) data transmission check digital temperature and humidity sensor SHT75, can be very convenient system directly interfaces with other microprocessors, microcontrollers, largely increase the convenience and reliability of the sensor interface development, has incomparable advantages of traditional analog sensors has 51 kernel derived microcontroller; (2) has a larger capacity internal RAM, do not expand the external memory, simplify circuit design and improve the reliability of the control circuit. At the same time, be able to support 51 family of programming languages, develop simple; (3) to achieve a real-time display of the serial communication hardware and software design as well as a PC data acquisition; (4) using a variety of hardware support TTL / COMS output level integrated circuits can be directly interfaced with a microprocessor, simplifying the overall circuit design to reduce circuit failure rate, and improve the reliability of the entire circuit. Papers have more actual reference value, at the same time, is easy to read, and for the future development of nuclear data acquisition provides a meaningful reference papers are attached in the actual circuit description and explain. And specifically in the paper gives the static voltage waveform of the measured values ??and signals must be in the process of debugging in the paper not only given program flow chart is easy with the understanding of the hardware circuit, at the same time, given a part of the actual program. Enclosing the actual overall circuit diagram in Section IX. This is one of the most significant features of this thesis.
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