CN201622351U - Nuclear signal random characteristic simulator - Google Patents
Nuclear signal random characteristic simulator Download PDFInfo
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- CN201622351U CN201622351U CN2009202433219U CN200920243321U CN201622351U CN 201622351 U CN201622351 U CN 201622351U CN 2009202433219 U CN2009202433219 U CN 2009202433219U CN 200920243321 U CN200920243321 U CN 200920243321U CN 201622351 U CN201622351 U CN 201622351U
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Abstract
The utility model discloses a nuclear signal random characteristic simulator, which comprises a DSP processing unit, a detector, a signal processing module, a multi-channel data acquisition and analysis module, a power supply module, an LCD display, a keyboard, a computer and multiple simulation channels. The DSP processing unit is connected with the multi-channel data acquisition and analysis module, the LCD display, the keyboard and the multiple simulation channels, and is connected with the computer via an SCI line, and the signal processing module is further connected with the multi-channel data acquisition and analysis module and the detector respectively. The simulator adopting a parametric model method can learn and simulate nuclear signal random characteristics on radioactive fields, and simultaneously can adjust parameters to meet requirements on diversified nuclear signal random characteristics in nuclear radioactive measurement according to needs.
Description
Technical field
The utility model relates to a kind of device that the random character of nuclear signal is simulated.
Background technology
Because the randomness of radionuclide decay, the ionization that produces in the detector, excite, opto-electronic conversion and electron multiplication etc. also are at random.The characteristics at random of the electrical output signal of nuclear radiation detector mainly show as the randomness in the time interval of pulse height and adjacent pulse.Present nuclear random signal generator is single basic distributions such as even distribution, Gaussian distribution, exponential distribution, polynomial expression distribution and Poisson distribution with this random character or simple designs, perhaps be designed to the simple combination that these distribute substantially, and in fact the random character of nuclear signal is often comparatively complicated, it is inaccurate being described with basic distribution few in number, is difficult to satisfy the dirigibility and the diversity requirement of random character.In addition, present nuclear random signal generator is not to test condition or environment---as the resolution of detector, radiation intensity, spectrum drift etc.---to be taken in.Therefore, its randomness of pulse signal that is offered spectrometer by these signal generators is single, and is inflexible, unlifelike.
The utility model content
The purpose of this utility model is to disclose a kind of device that the random character of nuclear signal is simulated.This device has overcome above-mentioned deficiency.
The technical scheme that its technical matters that solves the utility model adopts is:
A kind of device that the nuclear signal random character is simulated that the utility model is related adopts the parameterized model method, can learn and realistic simulation the complex statistics characteristic at radioactivity scene easily and flexibly; Simultaneously, also can adjust as required parameter with satisfy in nuclear activity is measured diversity to the nuclear signal random character require just like, can be by adjusting the variation of the statistical property that parameter brought by factors such as the variation of detector resolution and radiation intensity and nuclear spectrum drifts with simulation.
Nuclear signal random character simulator, comprise DSP processing unit, detector, signal processing module, multiple tracks data collection and analysis module, power module, LCD display, keyboard, computing machine and multi-channel analog passage, described DSP processing unit links to each other with multiple tracks data collection and analysis module, LCD display, keyboard, multi-channel analog passage, also links to each other with computing machine by the SCI line in addition.
Described nuclear signal random character simulator is equipped with detection channels, contains detector, signal processing module, multiple tracks data collection and analysis module, and the detection channels circuit board is pegged graft with taking separate type being connected of DSP mainboard.
Described nuclear signal random character simulator, signal processing module link to each other with detector with multiple tracks data collection and analysis module respectively.
The beneficial effects of the utility model are:
Adopted high performance DSP digital signal processor, to control with the numerical evaluation function and combine together, can obtain the data of measurement in real time, handle the pulse height of extraction nuclear signal and the parametrization statistical model in the adjacent pulse time interval through high speed signal, this process is called learning process; Produce pulse signal with the simulation object of being surveyed or environment according to the parametrization statistical model, the variation of the statistical property that parameter adjustment that can also be by statistical model is brought by factors such as the variation of detector resolution and radiation intensity and nuclear spectrum drifts with simulation, produce rich and varied statistical model, to satisfy the diversified requirement of spectrometer to the nuclear signal random character, save storage space simultaneously, improved dirigibility.In addition, the efficient control function of DSP can be apace and man-machine interface (containing LCD and keyboard) and computing machine communication, so that download power spectrum or time interval statistics from main frame, LCD can show the statistic fluctuation process of power spectrum in real time.In waveform output, hyperchannels such as pulse, Gauss, index have been adopted, to satisfy spectrometer to the diversified requirement of nuclear signal waveform.Structurally, taked probe access circuit board and the mode that the DSP mainboard separates, made things convenient for the exchange of γ, X fluorescence measurement circuit board, also made instrument more compact.
Description of drawings
The module catenation principle figure of the nuclear signal random character simulator that Fig. 1 provides for the utility model.
Embodiment
The utility model will be further described below in conjunction with accompanying drawing:
The module catenation principle figure of the nuclear signal random character simulator that Fig. 1 provides for the utility model.As shown in FIG., described nuclear signal random character simulator, comprise DSP processing unit, detector, signal processing module, multiple tracks data collection and analysis module, power module, LCD display, keyboard, computing machine and multi-channel analog passage (containing Gauss, index, rectangular pulse signal), described DSP processing unit links to each other with multiple tracks data collection and analysis module, LCD display, keyboard, multi-channel analog passage, links to each other with computing machine by the SCI line.Described nuclear signal random character simulator is equipped with detection channels, contains detector, signal processing module, multiple tracks data collection and analysis module, and the detection channels circuit board is pegged graft with taking separate type being connected of DSP mainboard.Described nuclear signal random character simulator, signal processing module link to each other with detector with multiple tracks data collection and analysis module respectively.
The DSP digital signal processor that is adopted is TMS320F2812,1.5 hundred million instructions of per second, 8 level production lines, 56 general programmable I/O (GPIO) pin, can reach the linear program/data address of 4M word, have digital signal processing function and control function efficiently, will control with the numerical evaluation function and combine together.---to be the passage that detector, signal processing module and multiple tracks data collection and analysis module are formed---link to each other for DSP digital signal processor and probe access, can obtain in real time the data of the object of surveying or environment---be the pulse height statistical property (power spectrum) of nuclear signal and the statistical property in the adjacent pulse time interval.The combination of utilization Gaussian function is set up parameterized model to the measured pulse height statistical property (power spectrum) and the statistical property in the adjacent pulse time interval, and this process is the learning process of instrument.The benefit that model parameterization brings is: the statistical property that only just can express original signal with few parameter, needn't note down to each amplitude and pulse interval constantly in measuring, save storage space (only need raw information amount 1/100) greatly; Realize simulation with the combination of Gaussian function sampling to original signal, the pulse height statistical property (power spectrum) of the nuclear signal that simulation produces and the statistical property in the adjacent pulse time interval obtain reproduction true to nature, and the statistic fluctuation process of nuclear signal also obtains reproduction true to nature simultaneously; The variation of the statistical property that the parameter adjustment by the pulse height statistical model is brought by factors such as the variation of detector resolution and radiation intensity and nuclear spectrum drifts with simulation; Realized that instrument obtains and reproduce the intellectuality of radioactivity object or environment random character.
The DSP digital signal processor links to each other with keyboard with the man-machine interface LCD display.Can show by LCD and the statistic fluctuation process of power spectrum to cooperate keyboard to be convenient to the setting of parameter simultaneously.On circuit, LCD links to each other with the GPIO mouth of DSP with keyboard.
The DSP digital signal processor links to each other with the multi-channel analog signal output channel, can export Gauss pulse, exponential pulse and 3 kinds of signals of rect.p., has satisfied the diversified requirement of nuclear instrument to signal waveform.Carry out the setting of waveform with keyboard, by the GPIO mouth of DSP the channel selecting analog switch is controlled on the circuit.The pulse output channel adopts 16 high-speed d/a converters, and is provided with smoothed filter circuit.During the D/A conversion, DSP produces pulse height and interpulse period at random according to the pulse height of nuclear signal and the statistical property model in the adjacent pulse time interval, calculate the input digit amount of each D/A conversion again by set pulse waveform, and by dsp chip task manager (EV) D/A conversion is controlled, the simulating signal after the conversion transfers out behind smoothed filter circuit.
The DSP digital signal processor links to each other with computing machine.Can further process data by the analysis software on the computing machine, also the statistical property data in the existing pulse height on the computing machine and the adjacent pulse time interval can be downloaded in the storer of this nuclear signal random character simulator simultaneously, to do study or the use of simulation random character.On circuit connected, the SCI serial communication line of dsp processor linked to each other with computing machine by MAX232 chip conversion back.
Survey the nuclear radiation data (this process is a learning process) of object or environment in order to obtain, the nuclear signal random character simulator that the utility model provides also is provided with probe access.Structurally, adopted the gamma-ray measurement circuit board and the x radionetric survey circuit board of separate type, promptly when carrying out gamma-ray measurement, gamma-rays circuit board and DSP mainboard have been pegged graft; In like manner, when carrying out the x radionetric survey, x ray circuit board and DSP mainboard are pegged graft.Adopt such structure to make instrument more compact, also made things convenient for the independent exploitation of detection channels, improved interchangeability.When carrying out spectral measurement, because electromagnetic radiation can take place in the interaction of ray and material, by detector this electromagnetic radiation is converted to faint electric signal, electric signal carries out integer by subsequent conditioning circuit and amplifies, and enters multiple tracks data collection and analysis module after making it to become electric impulse signal.Multiple tracks data collection and analysis module is carried out work under the control of dsp processor, be the analog signal conversion of different amplitudes corresponding digital signal, i.e. location, road, and recording impulse number is to form the power spectrum of nuclear signal, i.e. pulse height random character; Simultaneously, the dsp processor paired pulses quantizes interval time, is converted to digital quantity and adds up, to form the time random character of nuclear signal.Next, DSP just can finish once (information) data collection to the pulse height that obtained and time interval random character curve-be statistical distribution curve-set up Gauss's combination parameter statistical model.
In addition, the utility model has also adopted power management module, has reduced power consumption, is convenient to portable operation.
The present embodiment has overcome single, the dumb and unlifelike limitation of pulse signal randomness that present nuclear random signal generator produces, and can obtain the random character of actual signal by the learning functionality scene, and random character is set up parameterized model.Produce random signal to reproduce the primary emission scene by model, also can simulate varying environment and measuring condition neatly by parameter adjustment.Can existing data be downloaded in the instrument by computing machine, form the parameterized model storehouse for instrument.
Though described embodiment of the present utility model in conjunction with the accompanying drawings, the protection domain that those of ordinary skills do not need various distortion that creativity work just can make or modification still to belong to this patent within the scope of the appended claims.
Claims (3)
1. nuclear signal random character simulator, it is characterized in that: comprise DSP processing unit, detector, signal processing module, multiple tracks data collection and analysis module, power module, LCD display, keyboard, computing machine and multi-channel analog passage, described DSP processing unit links to each other with multiple tracks data collection and analysis module, LCD display, keyboard, multi-channel analog passage, also links to each other with computing machine by the SCI line in addition.
2. nuclear signal random character simulator according to claim 1 is characterized in that: be equipped with detection channels, contain detector, signal processing module, multiple tracks data collection and analysis module, the detection channels circuit board is pegged graft with taking separate type being connected of DSP mainboard.
3. nuclear signal random character simulator according to claim 1 is characterized in that: signal processing module links to each other with detector with multiple tracks data collection and analysis module respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202433219U CN201622351U (en) | 2009-11-18 | 2009-11-18 | Nuclear signal random characteristic simulator |
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| CN2009202433219U CN201622351U (en) | 2009-11-18 | 2009-11-18 | Nuclear signal random characteristic simulator |
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| CN201622351U true CN201622351U (en) | 2010-11-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913762A (en) * | 2014-03-28 | 2014-07-09 | 南京航空航天大学 | Channel radioactive substance inspecting and monitoring device and inspecting method |
| CN105404172A (en) * | 2015-10-21 | 2016-03-16 | 中国核动力研究设计院 | Device and method for nuclear detector signal simulation |
| CN109086555A (en) * | 2015-08-28 | 2018-12-25 | 易良碧 | Using the simulation spectrum curve emulation mode of Monte Carlo 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 |
-
2009
- 2009-11-18 CN CN2009202433219U patent/CN201622351U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913762A (en) * | 2014-03-28 | 2014-07-09 | 南京航空航天大学 | Channel radioactive substance inspecting and monitoring device and inspecting method |
| CN109086555A (en) * | 2015-08-28 | 2018-12-25 | 易良碧 | Using the simulation spectrum curve emulation mode of Monte Carlo method |
| CN105404172A (en) * | 2015-10-21 | 2016-03-16 | 中国核动力研究设计院 | Device and method for nuclear detector signal simulation |
| CN110161553A (en) * | 2019-06-06 | 2019-08-23 | 武汉大学 | A kind of gamma ray spectrometer measuring system that actual situation combines |
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| C14 | Grant of patent or utility model | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101103 Termination date: 20131118 |