Design Of Digital Acquisition And Processing System For Nuclear Signal Shape Based On DSP

The traditional nuclear measurement system with fewer functions is mainly composed of analog circuits. The system measuring radiation energy is difficult or unable to measure time and identify particles, vice versa. However, the nuclear radiation signal usually includes not only radiation energy information, but also the correlative information of radiation category, time and the like. With the development of modern super-large scale integration technology and the digital electronics technology, the new type acquisition system for nuclear information with high sampling speed AD, strong function DSP chip and high efficient arithmetic software can not only analyze nuclear signal extent, but also analyze the time characteristic of the nuclear signal, identify shape, sort and discriminate signal. This is the main research trend of the nuclear information acquisition and processing field.On the basis of the technologies of DSP digital signal processing, high speed AD sampling, PC interface and so on, the acquisition and processing system for nuclear radiative signal shape which has better application value is designed successfully in this paper.The AD chip which has 40MHz sampling frequency, 12 bit precision, high speed and low cost samples well the nuclear radiative signal whose rising time is about 1us and pulse width is less than 10us. The AD chip meets the sampling requirement of general nuclear radiative signal.The DSP chip TMS320C6205 provided with PCI interface is the core of the...