The Research Of Intelligent High Radiation Imitation Of Nuclear Signal Generator

As a common research method,digital nuclear information acquisition and processing technology plays an important role in many basic scientific research and application fields.Due to its high sensitivity,good accuracy,micro trace and nondestructive analysis,multi-element analysis capacity,etc,nuclear analysis technology has been widely used in many scientific fields,including geological resource exploration,evaluation of environmental radiation,material science,biomedical science,archaeology.The development of imitate nuclear signal generator has a huge influence on nuclear measurement and technology,It provides a safe,effective,simple method of nuclear test and measurement and become a hotspot in research of electronic and nuclear technology.It was widespread attention at home and abroad.The decay of radioactive nuclide in time and amplitude is random so the imitation of nuclear signal was the same.Specific performance is as follows:Nuclear signal pulses on the time in accordance with exponential distribution while conform to Gaussian distribution on the amplitude.According to this principle,the device generates a series of random number obey exponential and Gaussian distribution to imitate nuclear signal's statistical properties in time interval and amplitude.On the simulation of nuclear signal time's interval,this paper presents a linear congruence method generator(0,1)uniform distribution random numbers,then get the exponential distribution random digit by the method of inverse function,it regard as the statistical feature on the time interval.While on the simulation of nuclear signal amplitude,this paper put forward a new method which is different from the traditional.The traditional hold the view of regarding the Gaussian distribution obedient random numbers as the amplitude feature,but it is inexact,it can't reflect the amplitude of nuclear signal statistical properties reality.What is worse,different nuclear signal has different characteristic,in order to match the different traits it needs not only one parameters,obviously,this is a complex and difficult work.The difference is the new method in favor of reading a picture of nuclear spectrum through other device,with the signal filtering and noise processing,then calculating the segment threshold and remove the background noise by OTSU method,after that,scanning the image's pixel and acquiring valid of data on spectrum curve.Finally,get each of point on the curve by coordinates scale expansion.There must be defected in energy spectrum through the method which was mentioned above,the linear interpolation is the key to solve that problem.It inserts some values to fill the lack of energy spectrum curve to maintain data integrity.Finally,saved the data and served it as the amplitude statistical properties of nuclear signal.In the aspect of imitation of nuclear signal randomness,the paper put forward a methods,which was based on the(0,1)uniformly distributed random number,sampling the actual nuclear power spectrum after curve digitization array with the Monte Carlo direct method and getting a series of digits about nuclear signal level,then outputting those data in turn at the time interval which is instead by the random number obey exponential distribution.In this way,it can satisfy the nuclear signal statistical properties of time interval,amplitude and randomness at the same time.(Such as the time constant of the pulse before and after the formation,the circuit model parameters,the statistical fluctuation parameters of the amplitude and the time interval,etc.)are extracted and adjusted by using the low-emission spectrum as the reference,and the relevant parameters of the nuclear signal flow throughout the detection channel And extension,to achieve high-level simulation of the imitation of the signal generator.After that,Comparing the nuclear energy spectrum which was simulated by the Matlab tool to actual energy spectrum to verify the accuracy and reliability of the system.This study realized simulation in nuclear signal on the amplitude statistical properties by a new method,solved a variety of problems in the traditional methods.It improved the accuracy and performance greatly,not only does it blaze a new way in the academic field,but also has important practical value and scientific significance.