CN106033650A - System for simulating nuclear radiation experiment - Google Patents
System for simulating nuclear radiation experiment Download PDFInfo
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- 230000004223 radioprotective effect Effects 0.000 claims description 34
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Abstract
The invention discloses a system for simulating a nuclear radiation experiment. The system comprises a pedestal, a transmitting unit, and a detection unit, wherein the transmitting unit and the detection unit are arranged on the pedestal. The transmitting unit includes a replaceable transmitting assembly for generating light/power. The detection unit is used consists of a photoelectric sensor for detecting optical magnetic/electromagnetic waves and a detection control unit for executing a preset simulated operation based on the optical magnetic/electromagnetic waves. The system has the following beneficial effects: various radiation phenomena like an isotope half-life period, random radiation, an inverse square law, exponential decay of ray intensities in objects, and identification of different radiation and other nuclear radiation phenomena can be simulated, so that nuclear radiation teaching experiments can be carried out securely and conveniently. Besides, the system also can be used for measuring and demonstrating various properties of electromagnetic waves emitted by general light sources.
Description
Technical field
The present invention relates to radioprotective simulation field, a kind of replace the imitative of radioprotective with light or electromagnetic signal
Eucaryon radiation experiments system.
Background technology
Radioprotective is a kind of basic physical phenomenon being widely used.Be a lot of science and engineering subject (as nuclear physics,
Radiotherapist etc.) important content.At present, most of radioprotective Physical Experiments also use radioactivity coordination
Element, as radiation source, carries out being inconvenient for.Because
1) mechanism just granted must can use radiosiotope through troublesome program in teaching or training;
2) purchase of emitting isotope, storage, outdoor transport, disable after process all advised by precise procedures
Pipe;
3) responsible process radioisotopic personnel palpus is trained and makes regular check on health;
4) if losing radioactive substance, relevant place must be sealed and scan for;
5) people participating in experiment can be radiated by certain degree unavoidably, and the dosage only absorbed is often far below regulation
The upper limit;
6) during great nuclear accident occurs, the public can produce fear to radioprotective, makes teacher, technology people
Member, student and the head of a family the most more resist and participate in school and carry out radioprotective experiment.
Along with a large amount of use of nuclear energy becomes increasingly popular, in order to allow more people can obtain core spoke with radiating medical technology
The basic general knowledge penetrated, reduces unnecessary doubt and fear, there is a need to society, including non-science life,
Middle school and pupil etc., promote radioprotective education.Based on above-mentioned difficulties, it is necessary to reform current radioprotective
Experimental technique.How to make and just test the needs of safer, simple, interesting and applicable Future experiments technology
Become new developing direction.
One of them developing direction is to utilize emulation experiment to simulate radiation phenomenon, uses radioactivity same to reduce
Position inconvenience caused by element and danger.Emulation technology has been used for a lot of high cost or the activity of danger and operation,
Such as drive simulating, blasting experiment etc., but fewer for teaching.Therefore it is contemplated that same concept
It is incorporated in new radioprotective education experiment design with technology.
Another developing direction is to carry out radioprotective experiment with telecontrol engineering, and experimenter can be made away from radiation
The radiation dose that source is accepted with attenuating.Telecontrol engineering is widely used in medical monitoring, machinery excavates, blast
Test, the field such as outdoor environment monitoring.Plus various wireless communications products (such as mobile phone, iPad, Tablet etc.),
Emerging in large numbers of wireless data transmission technology (such as WiFi, GPRS, bluetooth), application program (Apps) etc., more has
Being beneficial to realize wireless remote control, data transmission and networking, real time data monitoring and feedback etc., pole meets modern year
Blue or green people uses the inertia of sci-tech product.The pattern operated by computer controlled machine device at present is likely to wireless
Telecontrol engineering is replaced.Many simple application examples can have been found on the net.But wireless remote control or less
For general teaching.Even if the product of famous Teaching Instrument Company is also many there to be line traffic control technology.Therefore
It is contemplated that concept and the technology of wireless remote control are incorporated in new radioprotective education experiment design.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned difficulty carrying out radioprotective experiment, it is provided that one
Planting the system for simulated core radiation experiments, this system uses to be had at remote control mechanism and wire/wireless data
The instrument design of reason mechanism, is used for emulating various radioprotective phenomenon.
The technical solution adopted for the present invention to solve the technical problems is: structure one is real for simulated core radiation
The system tested, this system includes pedestal, and is arranged at the transmitter unit on described pedestal and probe unit;
Described transmitter unit includes for producing optical electrical magnetic wave to emulate the emission control of described radioprotective experiment
Unit and for launching the replaceable emitting module of described optical electrical magnetic wave;Described probe unit includes for visiting
Survey the photoelectric sensor of described optical electrical magnetic wave and perform the spy of the simulation trial preset according to described optical electrical magnetic wave
Survey control unit.
In the systems described in the present invention, described pedestal includes for measuring described transmitter unit and described detection
The length of unit and the gage of distance.
In the systems described in the present invention, described optical electrical magnetic wave includes continuous light/electromagnetic wave, optical electrical magnetic field impulse.
In the systems described in the present invention, described replaceable emitting module also comprises charge-discharge circuit, wherein, with
Described charge-discharge circuit or include default function program drive with described emission controlling unit or detection control unit
Dynamic described replaceable emitting module, thus produce the described optical electrical magnetic wave of intensity exponentially decay, with simulation
The isotopic activity of short-half-life.
In the systems described in the present invention, described system also includes the absorption plant for absorbing light/electromagnetic wave,
Described absorption plant is arranged between described replaceable emitting module and described photoelectric sensor.
In the systems described in the present invention, described absorption plant is neutral-density filter, described neutral density
Optical filter makes described optical electrical magnetic wave be attenuated to an intensity level preset.
In the systems described in the present invention, described absorption plant is filter set, and described filter set is used for filtering
Except the optical electrical magnetic wave of corresponding wavelength in described optical electrical magnetic wave.
In the systems described in the present invention, described emission controlling unit is for modulating the letter of described optical electrical magnetic wave
Number intensity or signal frequency, so that the phenomenon that its random strength presenting ionizing radiation rises and falls, thus emulate institute
State radioprotective experiment.
In the systems described in the present invention, described radioprotective experiment is simulation half-life isotopes experiment, described
Half-life isotopes experiment is for gradually being made time per unit declined by decay probability or decay probability distribution function
The nuclear number become, and gradually deduct from the nuclear number not yet decayed;Wherein, described computational methods are used
In the probability-distribution function including binomial distribution, Poisson distribution and normal distribution.
In the systems described in the present invention, described computational methods also include from default number field uniformly at random
It is drawn from variable, and is substituted into corresponding nonlinear mathematical functions, thus the statistical property needed for obtaining
Functional value, in order to simulate the change at random intensity level of described radioprotective.
In the systems described in the present invention, described emission controlling unit be additionally operable to by the half-life calculate average light/
Electromagnetic wave signal intensity or optical electrical magnetic wave pulse frequency or corpuscular radiation speed, and introduce described signal
Intensity or described signal frequency are to carry out random fluctuation modulation.
In the systems described in the present invention, described detection control unit is additionally operable to simulate the core spoke including enumerator
Penetrate detector;Wherein, the work process of described enumerator use the response curve of described photoelectric sensor close
System, and the optical electrical magnetostatic wave signal of detection gained is converted into radion counting rate.
In the systems described in the present invention, described detection control unit is additionally operable to perform multiple according to different order
The simulation trial preset, the plurality of simulation trial include average light/electromagnetic wave signal intensity and signal frequency,
Stochastic Modulation, random background radiometer digit rate and simulate the calculating of total radion counting rate.
In the systems described in the present invention, described detection control unit is additionally operable to derive the radiation of described random background
Counting rate or described simulation total radion counting rate.
In the systems described in the present invention, made in described emission controlling unit and described detection control unit
Calculating be individually separated or be incorporated in same default arithmetic unit and completed.
In the systems described in the present invention, described probe unit also includes display device, storage device and network
Interface;
Described display device is used for showing that described system carries out data produced by described simulated core radiation experiments;
Described storage device is used for storing described data;Described network interface is for transmitting by wired or wireless data
Mode is sent to the computer preset or default wireless communication facility described data, then is passed by the Internet
Deliver to the remote server preset.
In the systems described in the present invention, described wireless communication facility is additionally operable to the function of system described in remote control,
Described function includes:
Control described transmitter unit and calculate average light/electromagnetic wave signal intensity or optical electrical magnetic wave arteries and veins by the half-life
Rush frequency or corpuscular radiation speed, introduce described signal intensity or described signal frequency to carry out random fluctuation
Modulation, launches described optical electrical magnetic wave;
Control described probe unit to receive described optical electrical magnetic wave, carry out the plurality of simulation trial, display institute
State data and be sent to described computer or described wireless communication facility.
Implementing a kind of system for simulated core radiation experiments of the present invention, having the advantages that can mould
Intend multiple radioprotective phenomenon, thus safely and conveniently carry out radioprotective education experiment;Started one brand-new
Radioprotective experimental didactics, demonstrate how to use simulation and telecontrol engineering to carry out proemial teaching
Experiment;Promote and use universal wireless communications products to come Remote control apparatus and experiment;The various modern times are applied to have
Line or wireless messages treatment technology show, store, transmit and obtain experimental data.Additionally, native system is also
Can be used for measuring and demonstrating the various character of the electromagnetic wave sent from general light source, such as light intensity change in time
Change and declining time square inverse relation, fluorescence and phosphorescence exponential damping in time, light beam propagate in media as well
Subtract and pass through the phenomenon such as disappearance after filter plate.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
A kind of system construction drawing for simulated core radiation experiments that Fig. 1 provides for first embodiment of the invention;
The block diagram of the transmitter unit that Fig. 2 provides for the present invention;
The block diagram of the probe unit that Fig. 3 provides for the present invention;
A kind of systematic difference schematic diagram for simulated core radiation experiments that Fig. 4 provides for the present invention;
Fig. 5 a is the probability-distribution function figure of optical electrical magnetic wave emissive porwer;
Fig. 5 b is the probability-distribution function figure of the unit time interior optical electrical magnetic wave pulse number provided;
Fig. 5 c is the probability-distribution function of unit time interior decay nuclear number;
The response curve of the photoelectric sensor that Fig. 6 provides for the present invention;
The coordinate diagram of the mensuration of the simulated emission half-life isotopes that Fig. 7 provides for the present invention;
The pass of the frequency that the random different particle counting rates radiated in simulation experiment that Fig. 8 provides for the present invention occur
It it is coordinate diagram;
A kind of operation workflow figure of the system for simulated core radiation test that Fig. 9 provides for the present invention;
The another kind of operation workflow figure of the system for simulated core radiation experiments that Figure 10 provides for the present invention;
The system construction drawing for simulated core radiation experiments that Figure 11 provides for second embodiment of the invention;
Figure 12 is lonizing radiation by the decay schematic diagram after material that thickness is d;
The system construction drawing for simulated core radiation experiments that Figure 13 provides for third embodiment of the invention;
Figure 14 is the schematic diagram that optical filter absorbs lonizing radiation.
Detailed description of the invention
In order to be more clearly understood from the technical characteristic of the present invention, purpose and effect, now comparison accompanying drawing is detailed
Describe the detailed description of the invention of the bright present invention in detail.
The present invention is a set of to comprise hardware, software and the system of calculating method, can emulate multiple radioprotective phenomenon.
The system for simulated core radiation experiments that the present invention provides can be imparted knowledge to students real with the radioprotective that carries out of safe ready
Test.This system can emulate multiple radioprotective phenomenon, including half-life isotopes, random radiation, inverse square
Exponential damping in material of law, transmitted intensity, identify that different types of radiation and other radioprotective are existing
As.
As it is shown in figure 1, a kind of system for simulated core radiation experiments provided in first embodiment of the invention
In structure chart, this system includes pedestal 1, and is arranged at the transmitter unit 2 on described pedestal 1 and visits
Survey unit 3;Described pedestal 1 includes for measuring described transmitter unit 2 and the length of described probe unit 3
And the gage 11 of distance.
Described transmitter unit 2 includes for producing optical electrical magnetic wave to emulate the transmitting control of described radioprotective experiment
Unit 21 processed and for launching the replaceable emitting module 22 of described optical electrical magnetic wave;Described probe unit 3
Including for detecting the photoelectric sensor 32 of described optical electrical magnetic wave and performing to preset according to described optical electrical magnetic wave
The detection control unit 31 of simulation trial.Wherein, described optical electrical magnetic wave includes continuous light/electromagnetic wave, light
/ electromagnetic pulse.
The block diagram of the transmitter unit that Fig. 2 provides for the present invention, as in figure 2 it is shown, emission controlling unit 21 is wrapped
Include the first wireless transceiver, first microprocessor, the first power supply and interface circuit.This first micro-process
Device issues a signal to interface circuit, drive replaceable emitting module 22 send continuous light/electromagnetic wave or light/
Electromagnetic impulse, and simulate ionization with the intensity of continuous light/electromagnetic wave or the frequency of optical electrical magnetic wave pulse
The intensity of radiation.
The block diagram of the probe unit that replaceable emitting module replaceable emitting module Fig. 3 provides for the present invention, as
Shown in Fig. 3, described detection control unit 31 include the second wireless transceiver, signal interface circuit, second
Microprocessor, sounding component, I/O circuit and second source.Photoelectric sensor 32 is used for simulating radiation
Detector, to receive the radiation signal of optical electrical magnetic wave, then produces voltage or current signal, voltage or electric current
Signal is transferred into the signal interface circuit in detection control unit 31, then to the second microprocessor, first
Microprocessor and the second microprocessor are electrically connected with collaborative modulated signal, make transmitter unit 2 produce just like very
It it is the random fluctuation of intensity of radiation.
Second microprocessor is the intensity of modulated signal, i.e. continuous light/electromagnetic wave or optical electrical magnetic wave
The frequency of pulse, is scaled radion counting rate;Second microprocessor recycling random number manufactures a simulation
Background radiation signal, is added into radion counting rate, draws the total radion counting rate of simulation.
Second microprocessor drives sounding component to send such as radiation detection according to simulating total radion counting rate
The sound that device is sent, thus reach the effect of analog prober.
Described computational methods can all complete at first microprocessor or the second microprocessor, and it also includes using
Projection function, the random number extracted equably from certain number field, non-thread projects another function linearly
Territory, makes the functional value of generation have required statistical distribution.Again these functional values are projected another territory,
Make last range have, with described simulated radiation intensity level, there is identical meansigma methods and standard deviation.Tool
Body is, uses Box-Muller conversion, and in the linear plane territory of (0,1), uniformly random sampling, passes through
Box-Muller converts, it is thus achieved that present the random number of normal distribution, is used for simulating have normal distribution
The radioprotective intensity level etc. of change at random, wherein, Box-Muller conversion is a kind of side producing random number
Method.
Or, described computational methods can separate, all or locally in described emission controlling unit or detection control
Unit completes.
In figure 3, described probe unit 3 also includes display device 33, storage device 34 and network interface
35;Described display device 33 is used for showing that described system carries out number produced by described simulated core radiation experiments
According to;Described storage device 34 is used for storing described data;Wherein, described display device 33 can be with detection
Unit is integrated, it is also possible to be individually present;Described storage device 34 can be flash memory.
Wherein, for background and the acquisition of the total radion counting rate of simulation, can be based on removable optical electrical
The replaceable emitting module of magnetic wave is launched optical electrical magnetostatic wave signal and is created simulated emission particle counting rate.In order to add
Enter the impact of background radiation in real radioprotective experiment, random number functions can be utilized in a program, with per second
Frequency accidental several times inserts.The counting rate that addition background radiation causes is referred to as simulating total radion counting
Rate.The signal simulating total radion counting rate flows to be that the data simulating total radion counting rate can quilt
Deliver to I/O circuit, be then sent through display or quick flashing reservoir.Shown data can be slower speed (as
Average 1 time per second) update.But radioactive particle counting rate and audible frequency may be with speed faster (as often
20 milliseconds 1 time) update.Simulate total radion counting rate data can through I/O circuit and wireless transceiver,
Utilize various wired (USB etc.) and wireless data delivery (such as radio frequency, Arduino, WiFi, GPRS etc.) skill
Art delivers to various terminal unit, such as computer, wireless communication facility (mobile phone, tablet PC etc.), interconnection
Net, cloud server or other servers etc..
A kind of systematic difference schematic diagram for simulated core radiation experiments that Fig. 4 provides for the present invention, such as figure
Shown in 4, described network interface 35 is used for by wired or wireless data transfer mode described data transmission
To the computer 5 preset or the wireless communication facility 6 of presetting, then by the Internet be sent to preset long-range
Server.Described network interface 35 can be interface wirelessly or non-wirelessly.Computer 5 can be computer
Or computer, wireless communication facility 6 can be mobile phone or panel computer etc., is finally resent to the Internet,
Thus send to remote server.Remote server can be cloud server, it is also possible to be to build in advance
Data network server.This network interface 35 can also directly be transferred data to far by wireless connections
Journey server.
Meanwhile, wireless communication facility 6 can also pass through the first wireless transceiver and the second wireless transceiver remote control
Described transmitter unit 2 and described probe unit 3 work, and to reach to put into practice robot running, process data
With the purpose carrying out education experiment.Wherein, the function of system described in the remote control of described wireless communication facility 6 includes:
1, control described transmitter unit 2 and calculate average light/electromagnetic wave signal intensity or optical electrical by the half-life
Magnetic wave pulse frequency or corpuscular radiation speed, introduce described signal intensity or described signal frequency with carry out with
Machine relief modulation, launches described optical electrical magnetic wave;
2, control described probe unit 3 to receive described optical electrical magnetic wave, carry out the plurality of simulation trial, aobvious
Show described data and be sent to described computer 5 or described wireless communication facility 6.
Preferably, wireless communication facility 6 can switch with control system, set removable optical electrical magnetic wave
Replaceable emitting module work parameter and the form of output signal, the running of calculation procedure, the transmitting-receiving of data,
Wireless communication facility 6 is drawn and shows.
The distant control function that the present invention is shown can be extended to the education experiment for remote control tool danger, engineering behaviour
Make, and replace computer to operate machinery.
This system is implanted into corresponding software to realize also by first microprocessor and the second microprocessor
The function of simulated core radiation experiments, function includes:
1, Stochastic Modulation signal is derived;
2, the signal after conversion is modulated becomes radioactive particle counting rate;
3, produce random background radiometer digit rate and draw simulation gross activity particle counting rate.
Wherein, above-mentioned functions all can have been worked in coordination with first microprocessor by the second microprocessor, it is also possible to by
Second microprocessor completes output and translation function, and first microprocessor completes to produce simulation gross activity particle
Counting rate.
For the acquisition of Stochastic Modulation signal, the Stochastic Modulation of the output of replaceable emitting module 22 can be with such as
Lower or other different modes produce:
The method of the first kind, is first to set simulated emission source initially to have NoThe individual nuclear number not decayed.Single
The chance rate that in bit time, each atomic nucleus not decayed occurs decay is p.By probability p within the unit interval
The atomic nucleus not decayed is checked whether one by one and decays, draw the nuclear number of decay within this period
For-Δ N (> 0).This result is converted in proportion and becomes the continuous light/electromagnetic intensity I being issued:
I=C × (-Δ N) (formula 1)
Wherein C is an either constant, and the probability-distribution function of optical electrical magnetic wave emissive porwer is as shown in Figure 5 a.
The optical electrical magnetic wave umber of pulse Δ M that the result of above-mentioned-Δ N is provided in also can being converted into the unit interval:
Δ M=-Δ N (formula 2)
And the probability-distribution function of the optical electrical magnetic wave pulse number provided in the unit interval is as shown in Figure 5 b.Formula
1 and the result of formula 2 all can present the probability distribution of decay nuclear number as shown in Figure 5 c.
The removable replaceable emitting module of optical electrical magnetic wave 22 is driven and is sent such as (formula 1) or (formula 2) institute
Continuous light/the electromagnetic wave shown or optical electrical magnetic wave pulse.The most again the nuclear number of just decay from not yet decaying
Nuclear number deduction.In next unit interval, repeat above-mentioned random detection and optical electrical magnetostatic wave signal
The step provided.It will be seen that I or Δ M drops in time, and the random strength presenting the most truly radiation rises
Volt.
The method of Equations of The Second Kind is to utilize the probability-distribution function (probability of radioisotope decays
Distribution function) introduce random fluctuation.Describing core radiative process is binomial distribution function.As not
The nuclear number of decay is from initial value NoDropping to N, probability-distribution function this moment can be schematically represented as
Appearance such as Fig. 5 c.Transverse axis represent provide in next unit interval particle number (i.e. particle counting rate=
-Δ N, central-Δ N > 0).Note-Δ N=n, and the longitudinal axis is the probability certain n value occur, P.Then function
Derive by formula below:
The area of figure line relevant range is divided into the little lattice that a lot of area is identical, randomly draws one in this range
Point (ξ ", η ").As reconnaissance falls at the following areal extent of figure line, then make ξ " value again cut and surely become this little lattice
Abscissa value residing for central point.It is also cut determines into-the value of Δ N.With (formula 1) and (formula 2) ,-Δ N is pressed
Ratio turns to I or Δ M.As reconnaissance (ξ ", η ") falls in the areal extent more than figure line, and this step is then abandoned,
And re-start the operation of another random selecting point again.A reconnaissance should be able to be successfully completed in time per unit,
By gained-Δ N value drives the removable replaceable emitting module of optical electrical magnetic wave to send intensity is the continuous of I
Optical electrical magnetic wave or M optical electrical magnetic wave pulse of Δ.Then n (=-Δ N) from N number of atom not yet decayed
Core is deducted, then in next unit interval, repeats above procedure.The I or the Δ M that measure will drop in time,
And present the random strength fluctuating such as true radiation.This statistics rule rate is relatively more suitable for (connecing when N value is smaller
Near when all decaying), the numeric ratio shown in (formula 3) is used when being easier to calculate.
When N value is very big but p value is the least, (formula 3) can approximate with Poisson distribution.
<n>is the averaged particles counting rate in a certain moment, can cut and be set to pN.Face figure line relevant range
It is integrated into the little lattice that a lot of area is identical, randomly draw in this range a bit (ξ ", η ").As reconnaissance falls at figure
The following areal extent of line, then make ξ " value again cut the abscissa value surely become residing for this little lattice central point.
It is also cut determines into-the value of Δ N, and obtains I or Δ M with (formula 1) and (formula 2).As reconnaissance fall figure line with
Upper areal extent, this operation is just abandoned and again extracts another point.The I that in time per unit, success obtains
Or Δ M is used as driving the removable replaceable emitting module of optical electrical magnetic wave, make it send company that intensity is I
Continuous optical electrical magnetic wave or M optical electrical magnetic wave pulse of Δ, then n (=-Δ N) is deducted from N, then repeat
Above step.I or Δ M value in time and random fluctuation also can obtain.
As<n>=pN > > 1, (formula 4) can be transformed into normal distribution further.
Function is determined by the value of<n>=pN and p in each moment.σ in formula is standard deviation,
As p < < 1,Now function can be determined by the value of pN.Equally repeat with above-mentioned
Carry out random selecting point and optical electrical magnetostatic wave signal emission process, I or Δ M can be obtained over time and at random
Rise and fall.
The I or Δ M value in a certain unit interval section also can be by from certain number field uniformly random sampling gained
Variable, substitutes into suitable transformation relation and tries to achieve the functional value having required statistical nature, try to achieve further
It is modeled the change at random intensity level of radioprotective.The following is to obtain with Box-Muller conversion and present normal state
The random number of distribution has an example of the change at random radioprotective intensity level of normal distribution with simulation.Should
Method is first in the interval of (0,1), two numeral: R and θ of uniformly random extraction.Then u and v is made
It is equal to:
So, u and v will be the random random number between 0 and 1 in normal distribution.U and v is utilized to obtain
Particle counting rate n (=-Δ N) occurred in going out certain unit interval is as follows:
Or (formula 10)
Result is put into (formula 1) and (formula 2), tries to achieve continuous light/electromagnetic intensity in the above-mentioned time, I=
C × (-Δ N)=Cn, or the electromagnetic impulse number Δ M=-Δ N=n provided.And use the method can make above-mentioned calculating
Program is fairly simple.
In addition to normal distribution, it would however also be possible to employ other transformation relations being suitable for, from certain linear number field
The change of variable of randomization gained becomes to present the functional value of other statistical natures, and asks for by mould by result
The radioprotective change at random intensity level intended.
When using Poisson distribution or normal distyribution function, it is also possible to Theoretical Calculation draws<n>change in time
Change.Can first set elimination half life values T1/2, thus it is as follows to calculate p:
P=ln (2)/T1/2(formula 11)
P is equal to decay constant, k.Carve, in any a period of time, the average atom number<N>not yet decayed to press over time
Exponential damping formula describes:
<N (t)>=NoExp (-kt) (formula 12)
Or<N (t)>=NoExp (-pt) (formula 13)
NoIt it is the atomic number that do not decays at initial time.Averagely decayed in next unit interval atomic number:
<n>=<-Δ N>=p<N (t)>Δ t (formula 14)
Δ t can be set as the unit time, equal to 1, then
<n>=<-Δ N>=p<N>(formula 15)
Or<n>=<-Δ N>=p NoExp (-kt) (formula 16)
Such as decay probability Normal Distribution, then the probability-distribution function of any instant is by its intermediate value<n>=p<N>
(formula 15) andApproximation.And shown that the meansigma methods of I and Δ M is by formula (formula 1), (formula 2)
<I>=Cp NoExp (-kt) (formula 17)
<Δ M>=p NoExp (-kt) (formula 18)
The mean intensity of the continuous light/electromagnetic wave sent in drawing time per unit respectively, or in time per unit
The average counter rate of the optical electrical magnetic wave pulse sent.
One special circumstances is that p is minimum, that is half-life T1/2Time the longest,<N>changes over hardly,
That is<-Δ N>is almost unchanged.Now can be the driving of the removable replaceable emitting module of optical electrical magnetic wave 22
Signal is set as constant, makes the value of<I>or<Δ M>maintain fixing level.Finally, then use random selecting point
Step introduce I or the random fluctuation of Δ M, be then added to meansigma methods<I>or<Δ M>go.
For simulating the acquisition of total radion counting rate, whenever experiment is measured through photoelectric sensor 32
Continuous light/electromagnetic intensity I, thus when obtaining simulated emission particle counting rate, photoelectric sensor 32 defeated
Going out, ζ (curtage) is not the most linear with input signal.So must be with the sound of sensor 32
Curve is answered to calibrate, to find out the transformational relation of output-input signal.
The response curve of the photoelectric sensor that Fig. 6 provides for the present invention, as shown in Figure 6, it is shown that input
Continuous light/electromagnetic intensity exports the relation of the signal of telecommunication with it.This curve can obtain from directly measuring, it is possible to
Obtain from device supplier.Utilize this function or contrafunctional relation, can carry out the forward between I and ζ or
Reverse conversion.
Another embodiment of the present invention can be used for half-life isotopes simulation experiment:
The setting of this experiment is as shown in Figure 1.First select and be modeled radioisotopic half-life T1/2, its
Size preferably makes experiment can complete (in the classroom as) within reasonable time, such as 15 minutes.
And selected initial light or electromagnetic signal strength value, < Io>.It is proportional to just beginning and end decay atomic number, No。
After opening system power supply, the removable replaceable emitting module of optical electrical magnetic wave starts to launch optical electrical magnetic wave
Signal intensity,<I>, change on time is as shown in (formula 17).<I>is proportional to the corpuscular radiation speed in this moment
Rate, or radion counting rate.Press Normal probability distribution function again and add Stochastic Modulation.Signal after modulation
Measured, it is derived total radion counting rate of random fluctuation.User (such as student) can be made during teaching
Background influence is deducted.Draw radion counting rate relation in time again.Use exponential damping equation model
Linearity regress, therefrom obtains the optimal fitting value of k, k*, then calculates the maximum likelihood estimate T of half-life1/2*=
Ln (2)/k*, and with original setting value, T1/2, compare.
Use system described in the present embodiment, selected simulated radioisotopic half-life T1/2=7 minutes.
The average intensity value of optical electrical magnetic wave output signal,<I>, will exponentially form drop in time.After being modulated
Output intensity presents random fluctuation, strengthens the sense of reality of simulation experiment.Deduction is average " background radiation is strong
Degree " after, the output of photoelectric sensor is recorded, and is converted into radion counting rate.Data, ln<I>,
Logarithm value relation in time be shown in Fig. 7.Visible ln<I in figure>present linear trend drop in time,
And comprise randomized jitter.Again with after a straight line fit data point, draw optimal fitting value k*=of k
1.633×10-3/ the second.And the optimal estimation of half-life is T1/2*=ln (2)/k*=424.6 second, it is similar to set
7 minutes of value.
Another embodiment of the present invention can be also used for inverse square law simulation experiment:
The optical electrical magnetostatic wave signal making the removable replaceable emitting module of optical electrical magnetic wave export has fixing intensity
Value,<I>, represent radion average counter rate.Add Stochastic Modulation.Can make during teaching user (as
Student) distance between the removable replaceable emitting module of optical electrical magnetic wave and photoelectric sensor is gradually changed
Become, and the output of recording light electric transducer, the impact of background correction radiation.Signal overall strength is sent out to all directions
Dissipate.Being the place of x away from the removable replaceable emitting module of optical electrical magnetic wave, photoelectric sensor can record
Light or electromagnetic signal strength are
Central Const is a proportionality constant.User can be made to draw<I>to 1/x2Change, really
After recognizing linear relationship, then ask for straight slope to determine the numerical value of Const.
Additionally, another embodiment of the present invention can be additionally used in radiates simulation experiment at random: first assume to be modeled to put
Penetrate isotopic decay process Normal Distribution.Half-life the longest (p is the least), the atomic number that do not decays (No) very
Greatly, pN > > 1.Make the optical electrical magnetostatic wave signal that the removable replaceable emitting module of optical electrical magnetic wave exports
There is fixing intensity level,<I>, represent the average counter rate of radion, pN.OrderRepresent probability to divide
The standard deviation of cloth functionAgain Stochastic Modulation is joined optical electrical magnetic wave output signal.System record
Emulation particle counting rate is over time.User (such as student) can be made during teaching being recorded at different time
The particle counting rate obtained is drawn as frequency spectrum, reexamines whether frequency spectrum meets normal state statistics rule rate.
Use system described in the present embodiment, first suppose that simulated radiosiotope has the longest partly declining
Phase, and pN > > 1.Normal distyribution function is comply with in the fluctuating of its activity.Can make removable light/
The replaceable emitting module of electromagnetic wave sends continuous light/electromagnetic wave that fixing intensity level is<I>, represents the most steady
The average counter rate of fixed radion, pN.OrderRepresent the standard deviation of probability-distribution functionAbove-mentioned normal distyribution function can determine that.Use random selecting point process Stochastic Modulation join light/
Electromagnetic wave output intensity is up.The data point obtained from photoelectric sensor is plotted frequency as shown in Figure 8
Figure.The distribution of data point meets normal state statistics rule rate, and shows random fluctuation.
A kind of operation workflow figure of the system for simulated core radiation test that Fig. 9 provides for the present invention.It is used
Can be as a special case in the embodiment of half-life isotopes simulation experiment.As it is shown in figure 9, this flow process
Mainly comprise the steps that
S101, in transmitter unit 2, according to the nuclear number not yet decayed and half-life, calculate next
The nuclear number of the average decay of unit interval or the mean intensity of the continuous light/electromagnetic wave that will launch
Value or the average pulse number of the optical electrical magnetic wave that will launch.
S102, in transmitter unit 2, according to radiation probability-distribution function, take sampling method, really
Determine random fluctuation modulated signal, the nuclear number of the average decay of order or the continuous light/electromagnetism that will launch
The average intensity value of ripple or the average pulse of the optical electrical magnetic wave that will launch counts existing Stochastic Modulation.
S103, in transmitter unit 2, send and be modulated signal and drive optical electrical magnetic wave radiated element to launch even
Continuous optical electrical magnetic wave or optical electrical magnetic wave pulse.
S104, in probe unit 3, the signal received by photoelectric sensor is converted into particle counting
Rate.
S105, in probe unit 3, produce random background radiometer digit rate.
S106, in probe unit 3, random background radiometer digit rate is inserted in experiment to obtain total
Radion counting rate.
S107, in the sounding component of probe unit 3, produce analog prober sound.
S108, in transmitter unit 2, provided nuclear number (or continuous light/electromagnetic intensity,
Or optical electrical magnetic wave umber of pulse) from not yet decay nuclear number (or continuous light/electromagnetic intensity or light/
Electromagnetic impulse number) middle deduction.
Wherein, step S101 can also be returned to after step S108 terminates.Due to the atomic nucleus averagely not decayed
Number can be calculated by decaying exponential function such as (formula 12), (formula 13) etc., and Stochastic Modulation signal then can be separately
Derive, be the most just superimposed to meansigma methods and go.So, step S108 may dispense with.
When simulating half-life the longest radioisotope decays, can make the removable optical electrical magnetic wave can be more
Change emitting module and maintain a stable output.Stochastic Modulation signal is just superimposed to this stationary value after deriving the most separately
Up.Step S108 may dispense with.
Above-mentioned steps is also by single microprocessor (i.e. in first microprocessor or the second microprocessor
Any one) realize.
The another kind of operation workflow figure of the system for simulated core radiation experiments that Figure 10 provides for the present invention.
It is with in another embodiment as a special case.As shown in Figure 10, this embodiment is different from shown in Fig. 9
Embodiment in place of be to use probability-distribution function use sampling approach to determine random fluctuation modulated signal
Step carry out in probe unit 3.This embodiment specifically includes following steps:
S201, in transmitter unit 2, according to the nuclear number not yet decayed and half-life, calculate next
The nuclear number of the average decay of unit interval or the mean intensity of the continuous light/electromagnetic wave that will launch
Value or the average pulse number of the optical electrical magnetic wave that will launch.
S202, in transmitter unit 2, send and be modulated signal and drive optical electrical magnetic wave radiated element to launch even
Continuous optical electrical magnetic wave or optical electrical magnetic wave pulse.
S203, in probe unit 3, the signal received by photoelectric sensor is converted into particle counting
Rate.
S204, in probe unit 3, according to radiation probability-distribution function, take sampling method, really
Determine random fluctuation modulated signal, the nuclear number of the average decay of order or the continuous light/electromagnetism that will launch
The average intensity value of ripple or the average pulse of the optical electrical magnetic wave that will launch counts existing Stochastic Modulation.
S205, in probe unit 3, produce random background radiometer digit rate.
S206, in probe unit 3, random background radiometer digit rate is inserted in experiment to obtain total
Radion counting rate.
S207, in the sounding component of probe unit 3, produce analog prober sound.
S208, in transmitter unit 2, provided nuclear number (or continuous light/electromagnetic intensity,
Or optical electrical magnetic wave umber of pulse) from not yet decay nuclear number (or continuous light/electromagnetic intensity or light/
Electromagnetic impulse number) middle deduction.
Such as half-life isotopes simulation experiment, step S208 can also return to step S201 after terminating.Due to
The average nuclear number not decayed can be calculated by decaying exponential function such as (formula 12), (formula 13) etc., and
Stochastic Modulation signal then can be derived separately, is the most just superimposed to meansigma methods and goes.So, step S208 just may be used
To save.
When simulating half-life the longest radioisotope decays, can make the removable optical electrical magnetic wave can be more
Change emitting module and maintain a stable output.Stochastic Modulation signal is just superimposed to this stationary value after deriving the most separately
Up.Step S208 may dispense with.
Above-mentioned steps realizes also by first microprocessor and the second microprocessor.
The system construction drawing for simulated core radiation experiments that Figure 11 provides for second embodiment of the invention, as
Shown in Figure 11, this embodiment is in place of being different from first embodiment, and described system also includes for absorbing
The absorption plant 4 of optical electrical magnetic wave, described absorption plant 4 is arranged at described replaceable emitting module 22 and institute
State between photoelectric sensor 32.Described absorption plant 4 is neutral-density filter, and described neutral density is filtered
Mating plate makes the output of described optical electrical magnetic wave be attenuated to an intensity level preset.
This embodiment can be used for simulated emission line strength exponential damping in material:
Neutral-density filter makes the optical electrical magnetic wave that the removable replaceable emitting module of optical electrical magnetic wave exports
Signal has fixing intensity level,<I>, represents radion average counter rate.Stochastic Modulation can be added.Religion
User can be made in class hour gradually to change the thickness d of neutral-density filter, and recording light electric transducer is defeated
Go out,<I>, then the impact of background correction radiation.Theory shows that<I>declines with d exponent function relation
<I (d)>=Ioe-μd(formula 20)
As shown in figure 12, user can draw the ln (Io/<the I>) change to d, after confirming linear relationship, then
Ask for straight slope to determine the numerical value of μ.
The system construction drawing for simulated core radiation experiments that Figure 13 provides for third embodiment of the invention, as
Shown in Figure 13, this embodiment is in place of being different from the second embodiment that absorption plant 4 is filter set, institute
State filter set for filtering the optical electrical magnetic wave of corresponding wavelength in described optical electrical magnetic wave.
This embodiment can be used for simulation identification lonizing radiation kind and tests:
The setting of this experiment is shown in Figure 13, loads onto multiple (general three kinds) removable in control unit 1
The replaceable emitting module of optical electrical magnetic wave, respectively sends the electromagnetic wave of different wave length, play the part of respectively α-, β-and γ penetrate
Line.The output of each removable optical electrical magnetic wave replaceable emitting module is made to have the optical electrical magnetic wave of fixing intensity to believe
Number, it is possible to each add Stochastic Modulation.The removable replaceable emitting module of optical electrical magnetic wave and photoelectric sensing
Three kinds of optical filters that may filter that different-waveband can be put between device.The selection of 3 optical filters to coordinate respectively can be more
Change the output wave band of emitting module.They play the part of paper, aluminium flake and lead flake respectively.The simulation effect made is
" α-ray " can be filtered when plugging " paper ", " α-and beta rays " can be filtered when plugging " aluminium flake ", and work as
Can filter all " ray ", as shown in figure 14 when plugging with " lead flake ".Various combination can be lighted during teaching
The replaceable replaceable emitting module of optical electrical magnetic wave, makes user insert different optical filters, thus identifies and put
The kind of contained radiation in ray.
Above in conjunction with accompanying drawing, embodiments of the invention are described, but the invention is not limited in above-mentioned
Detailed description of the invention, above-mentioned detailed description of the invention is only schematic rather than restrictive, this
The those of ordinary skill in field, under the enlightenment of the present invention, is being protected without departing from present inventive concept and claim
Under the ambit protected, it may also be made that a lot of form, within these belong to the protection of the present invention.
Claims (17)
1. the system for simulated core radiation experiments, it is characterised in that this system includes pedestal (1),
And it is arranged at the transmitter unit (2) on described pedestal (1) and probe unit (3);
Described transmitter unit (2) includes for producing optical electrical magnetic wave to emulate the transmitting of described radioprotective experiment
Control unit (21) and for launching the replaceable emitting module (22) of described optical electrical magnetic wave;Described detection
Unit (3) includes the photoelectric sensor (32) for detecting described optical electrical magnetic wave and according to described optical electrical magnetic
Ripple performs the detection control unit (31) of the simulation trial preset.
System the most according to claim 1, it is characterised in that described pedestal (1) includes for surveying
Measure the gage (11) of described transmitter unit (2) and the length of described probe unit (3) and distance.
System the most according to claim 1, it is characterised in that described optical electrical magnetic wave includes continuous light
/ electromagnetic wave, optical electrical magnetic field impulse.
System the most according to claim 3, it is characterised in that described replaceable emitting module (22)
Also comprise charge-discharge circuit, wherein, with described charge-discharge circuit or with described emission controlling unit (21) or detection
Control unit (31) includes default function program and drives described replaceable emitting module (22), thus produces
The described optical electrical magnetic wave of raw intensity exponentially decay, to simulate the isotopic activity of short-half-life.
System the most according to claim 1, it is characterised in that described system also includes for absorbing
The absorption plant (4) of optical electrical magnetic wave, described absorption plant (4) is arranged at described replaceable emitting module (22)
And between described photoelectric sensor (32).
System the most according to claim 5, it is characterised in that described absorption plant (4) is neutral
Density filters, described neutral-density filter makes described optical electrical magnetic wave be attenuated to an intensity level preset.
System the most according to claim 5, it is characterised in that described absorption plant (4) is for filtering
Sheet group, described filter set is for filtering the optical electrical magnetic wave of corresponding wavelength in described optical electrical magnetic wave.
System the most according to claim 1, it is characterised in that described emission controlling unit (21)
For modulating signal intensity or the signal frequency of described optical electrical magnetic wave, so that it presents the random of ionizing radiation
The phenomenon of intensity fluctuation, thus emulate described radioprotective experiment.
System the most according to claim 8, it is characterised in that described radioprotective experiment is same for simulation
Position element half-life experiments, described half-life isotopes experiment for by decay probability or decay probability distribution function by
The secondary nuclear number making time per unit decay, and gradually deduct from the nuclear number not yet decayed;Its
In, described computational methods are for including the probability-distribution function of binomial distribution, Poisson distribution and normal distribution.
System the most according to claim 9, it is characterised in that described computational methods also include from advance
If number field in be drawn from variable uniformly at random, and substituted into corresponding nonlinear mathematical functions, thus
The functional value of the statistical property needed for acquisition, in order to simulate the change at random intensity level of described radioprotective.
11. systems according to claim 8, it is characterised in that described emission controlling unit (21)
It is additionally operable to calculate average light/electromagnetic wave signal intensity or optical electrical magnetic wave pulse frequency or particle by the half-life
Emission rate, and introduce described signal intensity or described signal frequency to carry out random fluctuation modulation.
12. systems according to claim 11, it is characterised in that described detection control unit (31)
It is additionally operable to simulate the nuclear radiation detector including enumerator;Wherein, the work process of described enumerator uses
The response curve relation of described photoelectric sensor (32), and by the optical electrical magnetostatic wave signal conversion of detection gained
Become radion counting rate.
13. systems according to claim 12, it is characterised in that described detection control unit (31)
Being additionally operable to perform multiple default simulation trials according to different order, the plurality of simulation trial includes average light
/ electromagnetic wave signal intensity and signal frequency, Stochastic Modulation, random background radiometer digit rate and simulation are always put
The calculating of radion sub-count rate.
14. systems according to claim 13, it is characterised in that described detection control unit (31)
It is additionally operable to derive described random background radiometer digit rate or described simulation total radion counting rate.
15. systems described in-14 any one according to Claim 8, it is characterised in that launch control described
The calculating made in unit processed (21) and described detection control unit (31) has been individually separated or has been incorporated in
Same default arithmetic unit completes.
16. systems according to claim 14, it is characterised in that described probe unit (3) also wraps
Include display device (33), storage device (34) and network interface (35);
Described display device (33) is used for showing that described system is carried out produced by described simulated core radiation experiments
Data;Described storage device (34) is used for storing described data;Described network interface (35) is used for passing through
Wired or wireless data transfer mode described data be sent to the computer (5) preset or preset wireless
Means of communication (6), then the remote server preset it is sent to by the Internet.
17. systems according to claim 16, it is characterised in that described wireless communication facility (6)
Being additionally operable to the function of system described in remote control, described function includes:
Control described transmitter unit (2) and calculate average light/electromagnetic wave signal intensity or optical electrical by the half-life
Magnetic wave pulse frequency or corpuscular radiation speed, introduce described signal intensity or described signal frequency with carry out with
Machine relief modulation, launches described optical electrical magnetic wave;
Control described probe unit (3) to receive described optical electrical magnetic wave, carry out the plurality of simulation trial, aobvious
Show described data and be sent to described computer (5) or described wireless communication facility (6).
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CN108010412A (en) * | 2017-11-27 | 2018-05-08 | 中核控制系统工程有限公司 | A kind of simulated emission source |
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CN110009988A (en) * | 2019-04-26 | 2019-07-12 | 安徽核芯电子科技有限公司 | A kind of radiographic source and detector system simulator |
CN110009961A (en) * | 2019-04-16 | 2019-07-12 | 重庆建安仪器有限责任公司 | Simulated training box, simulation trainer and simulated training signal processing method |
CN110161553A (en) * | 2019-06-06 | 2019-08-23 | 武汉大学 | A kind of gamma ray spectrometer measuring system that actual situation combines |
CN110929468A (en) * | 2019-11-14 | 2020-03-27 | 北京大学 | Characterization method and application of single-particle irradiation-induced fluctuation |
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CN108510827A (en) * | 2018-04-12 | 2018-09-07 | 重庆建安仪器有限责任公司 | A kind of simulation trainer |
CN110009961A (en) * | 2019-04-16 | 2019-07-12 | 重庆建安仪器有限责任公司 | Simulated training box, simulation trainer and simulated training signal processing method |
CN110009988A (en) * | 2019-04-26 | 2019-07-12 | 安徽核芯电子科技有限公司 | A kind of radiographic source and detector system simulator |
CN110161553A (en) * | 2019-06-06 | 2019-08-23 | 武汉大学 | A kind of gamma ray spectrometer measuring system that actual situation combines |
CN110929468A (en) * | 2019-11-14 | 2020-03-27 | 北京大学 | Characterization method and application of single-particle irradiation-induced fluctuation |
CN113724555A (en) * | 2021-11-03 | 2021-11-30 | 四川新先达测控技术有限公司 | Simulation system is searched to radiation source |
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