阅读说明：本技术 一种无人机航空伽马能谱探测和数据处理系统及其处理方法 (A kind of detection of unmanned plane multi-element combination parameters and data processing system and its processing method ) 是由 曾国强 杨小峰 罗明涛 赖茂林 胡传皓 严磊 卿松 余鹏 于 2019-08-05 设计创作，主要内容包括：本发明提供一种无人机航空伽马能谱探测和数据处理系统,多晶体组合探头依次连接<Sup>241</Sup>Am放射源硬件稳谱装置、能谱控制与处理系统,多晶体组合探头原始能谱传递给<Sup>241</Sup>Am放射源硬件稳谱装置；<Sup>241</Sup>Am放射源硬件稳谱装置转化的能谱数据传递给能谱控制与处理系统；晶体温度监测装置安装在晶体上；多晶体组合探头、晶体温度监测装置、<Sup>241</Sup>Am放射源硬件稳谱装置均与能谱控制与处理系统连接,接受能谱控制与处理系统发出的命令,并返回状态或者数据信息。本发明可以使探测到的数据更为真实、稳定、可靠,且可以实现数据的实时在线分析和离线分析。(The present invention provides a kind of detection of unmanned plane multi-element combination parameters and data processing system, polycrystal coupling probe are sequentially connected 241 Am radioactive source hardware spectrum-stabilizing device, power spectrum control and processing system, the original power spectrum of polycrystal coupling probe pass to 241 Am radioactive source hardware spectrum-stabilizing device； 241 The gamma-spectrometric data of Am radioactive source hardware spectrum-stabilizing device conversion passes to power spectrum control and processing system；Crystal temperature effect monitoring device is mounted on crystal；Polycrystal coupling probe, crystal temperature effect monitoring device, 241 Am radioactive source hardware spectrum-stabilizing device is controlled with power spectrum and is connect with processing system, receives the order that power spectrum control is issued with processing system, and return to state or data information.It is more true, stable, reliable that the present invention can make the data detected, and the on-line analysis and off-line analysis of data may be implemented.)

1. a kind of unmanned plane multi-element combination parameters detection and data processing system, which is characterized in that the system mainly includes polycrystalline Body coupling probe, crystal temperature effect monitoring device,²⁴¹Am radioactive source hardware spectrum-stabilizing device, power spectrum control and processing system；Described Power spectrum control and processing system include power spectrum online processing and processed offline module；

The polycrystal coupling probe is sequentially connected²⁴¹Am radioactive source hardware spectrum-stabilizing device, power spectrum control and processing system are more The original power spectrum of crystal combinations probe passes to²⁴¹Am radioactive source hardware spectrum-stabilizing device；²⁴¹The conversion of Am radioactive source hardware spectrum-stabilizing device Gamma-spectrometric data passes to power spectrum control and processing system；

Crystal temperature effect monitoring device is mounted on crystal；

Polycrystal coupling probe, crystal temperature effect monitoring device,²⁴¹Am radioactive source hardware spectrum-stabilizing device is controlled and is handled with power spectrum System connection receives the order that power spectrum control is issued with processing system, and returns to state or data information.

2. a kind of unmanned plane multi-element combination parameters detection formed according to claim 1 and data processing system, which is characterized in that The crystal temperature effect monitoring device includes sensor, is uniformly attached to four sides of crystal, and every crystal pastes 8 temperature sensing altogether Device takes the average value of 8 temperature sensors as the temperature value of the crystal, realizes that temperature is surveyed using the DS18B20 of single line networking Amount.

3. a kind of unmanned plane multi-element combination parameters detection formed according to claim 1 and data processing system, which is characterized in that The polycrystal coupling probe, including sodium iodide crystal and lanthanum bromide crystal, crystal are externally provided with crystal insulating layer.

4. a kind of unmanned plane multi-element combination parameters detection and data processing method, which is characterized in that including power spectrum online processing side Method, the power spectrum on-line processing method the following steps are included:

(1) after the spectral line for measuring crystal of the same race synthesizes one, smooth denoising is carried out with polynomial least mean square fitting method to it, It is gradually segmented and is fitted with W=2m+1 modal data point with a polynomial of degree n, to achieve the purpose that smooth denoising；

(2) peak-seeking is carried out to the spectral line after smooth with Symmetric Zero area-method, symmetrical " window " function and experimental spectrum for being zero by area Data carry out convolution transform, will be zero to the convolution transform of linear substrate, the place that only there is peak is not zero, therefore to original The Symmetric Zero area conversion spectrum of modal data reflects the variation of peak type, with peak is looked for as unit of the standard deviation of conversion spectrum, works as transformation There is positive extreme value in the ratio between spectrum and its standard deviation, and are more than when giving to look for peak threshold value, to be taken as peak；

(3) after the peak position for obtaining spectral line, that is, nuclide identification is carried out；

(4) measurement data is depicted as circle of equal altitudes and path profile in intrinsic call suffer Become the picture software, medium altitude is benefit It is depicted as region circle of equal altitudes with GPS information and power spectrum counting rate or content value, path profile is then to utilize GPS information and temporal information Draw aircraft flight path figure.

5. a kind of unmanned plane multi-element combination parameters detection according to claim 4 and data processing method, which is characterized in that Step (3) includes following procedure:

Nuclide identification method is characterized peak match method, and peak-seeking result is matched with the characteristic peak data in nuclide library, meter Confidence level of coincideing is calculated, data of the identical confidence level less than 0.1 are given up, records the peak position information of remaining data and matching Nuclide library information matches data result with the nucleic data in nuclide library, calculates confidence level, confidence level size is met The data for the threshold condition being arranged be left nuclide identification as a result, recording its peak position road location, nucleic title, type and confidence Degree, and its characteristic peak net counting rate and activity are calculated, if activity value is less than the minimum detectable activity value (MDA) of system, recognize It is misrecognition nucleic for the nucleic, its all information is rejected from recognition result, the nucleic information finally left is nucleic Identify final result.

6. a kind of unmanned plane multi-element combination parameters detection according to claim 4 or 5 and data processing method, feature exist In, further include processed offline method, the processed offline method the following steps are included:

(1) under power spectrum processed offline mode, spectral line noise is reduced using statistical method to the smooth denoising mode of spectral line, benefit Main spectral shape (PC's) is extracted in original gamma spectra data set with the analysis method of principal component (PC) type；

(2) these main spectral shapes are used to reconstruct spectral line data collection, each spectral line after reconstruct all remains original signal simultaneously Not Noise；If spectral line road location is the road n, the matrix operation NASVD algorithm of m spectral line (m >=n) composition m × n is needed；

Remaining step of processed offline mode is identical as online processing mode.

Technical field

The invention belongs to unmanned plane detection technology fields, and in particular to a kind of detection of unmanned plane multi-element combination parameters and data Processing system and its processing method.

Background technique

In recent years, with the starting of survey of land and resources, airborne geophysical prospecting work is carried out in national large area, work difficulty It increasingly increases, the security risk for directly resulting in flight operation increases.Air crash thing for several times is had occurred and that in airborne geophysical prospecting industry Therefore cause a considerable amount of casualties.In addition multiple flight work accident dangerous situation also occurred, although personnel is not caused to hurt It dies, but the instrument and equipment of aircraft and loading also results in different degrees of damage, has aggravated the psychological burden of aviation operating personnel. Therefore it is extremely urgent to develop unmanned plane aerogeophysical object-detected technology.

Existing terrestrial surface radiation monitoring device almost all can only realize ground under the conditions of having road, personnel enterable Measurement, in some complicated environmental conditions or nuclear facilities overhead, measurement efficiency is low, sensitivity is not high, or even can not carry out measurement, no The requirement of geologic prospect, quality of radioactive environment monitoring can be fully met.

Unmanned plane Airborne gamma energy spectrum investigation system can be with vehicle-mounted gamma spectrometer, airborne gamma spectrometer, well logging gamma Energy disperse spectroscopy, ground gamma spectrometer form technology complementation, constitute the radioactivity of deep ground, earth's surface, low latitude, aerial three-dimensional non-blind area Monitoring；It can not be reached in personnel, vehicle and be badly in need of quickly setting out under region-of-interest gamma radiation nucleic information state, it is complete Scanning survey extreme low-altitude at specific region, quick and one-point measurement task improve related work efficiency and guarantee staff's spoke Penetrate safety.

Detection efficient and resolution ratio and the stable case of spectral line of detector etc. are all the weights of gamma spectrometry effect Measure condition.In general, detector of the same race, the crystal detection efficient of large volume will be much higher than the crystal of small size.In addition, The temperature of aerial different height can also change, and the variation of temperature can cause the drift of spectral line.Due to unmanned plane aero-gamma The problems such as spectral measurement system is caused spectrum to be floated by the biggish detector of the unbearable volume of unmanned plane load-carrying, air temperature variation Limitation, it is undesirable to often lead to measured data, not can be effectively carried out data analytical calculation etc..

As it can be seen that how to realize unmanned plane aircraft Ni-Cd battery system in limited loading capacity and Protean temperature It obtains more preferable, more acurrate, more true spectral line data in degree, how data is subjected to effective analytical calculation, is this field Technical staff's urgent problem to be solved.

Summary of the invention

In view of the above technical problems, the object of the present invention is to provide at a kind of detection of unmanned plane multi-element combination parameters and data It is more true, stable, reliable can to make the data detected, and the real-time of data may be implemented for reason system and its processing method On-line analysis and off-line analysis.

Specific technical solution are as follows:

A kind of detection of unmanned plane multi-element combination parameters and data processing system, the system mainly include that polycrystal combination is visited Head, crystal temperature effect monitoring device,²⁴¹Am radioactive source hardware spectrum-stabilizing device, power spectrum control and processing system；The power spectrum control It include power spectrum online processing and processed offline module with processing system；

The polycrystal coupling probe is sequentially connected²⁴¹Am radioactive source hardware spectrum-stabilizing device, power spectrum control and processing system System, the original power spectrum of polycrystal coupling probe pass to²⁴¹Am radioactive source hardware spectrum-stabilizing device；²⁴¹Am radioactive source hardware spectrum-stabilizing device The gamma-spectrometric data of conversion passes to power spectrum control and processing system；

Crystal temperature effect monitoring device is mounted on crystal；

Polycrystal coupling probe, crystal temperature effect monitoring device,²⁴¹Am radioactive source hardware spectrum-stabilizing device with power spectrum control with Processing system connection receives the order that power spectrum control is issued with processing system, and returns to state or data information.

The crystal temperature effect monitoring device includes sensor, is uniformly attached to four sides of crystal, and every crystal pastes 8 altogether Temperature sensor takes the average value of 8 temperature sensors as the temperature value of the crystal, real using the DS18B20 of single line networking Existing temperature measurement.

The polycrystal coupling probe, including sodium iodide crystal and lanthanum bromide crystal, crystal are externally provided with crystal insulating layer.

Invention provides the detection of unmanned plane multi-element combination parameters and data processing method of the system, including power spectrum online processing Method, the power spectrum on-line processing method the following steps are included:

(1) after the spectral line measured crystal of the same race synthesizes one, it is carried out with polynomial least mean square fitting method smooth Denoising, is gradually segmented with W=2m+1 modal data point with a polynomial of degree n and is fitted, to reach the mesh of smooth denoising 's；

(2) peak-seeking is carried out to the spectral line after smooth with Symmetric Zero area-method, by area be zero symmetrical " window " function and reality It tests modal data and carries out convolution transform, will be zero to the convolution transform of linear substrate, the place that only there is peak is not zero, therefore right The Symmetric Zero area conversion spectrum of raw spectral data reflects the variation of peak type, with looking for peak as unit of the standard deviation of conversion spectrum, when There is positive extreme value in the ratio between conversion spectrum and its standard deviation, and are more than when giving to look for peak threshold value, to be taken as peak；

(3) after the peak position for obtaining spectral line, that is, nuclide identification is carried out；

(4) measurement data is depicted as circle of equal altitudes and path profile, medium altitude in intrinsic call suffer Become the picture software That region circle of equal altitudes is depicted as using GPS information and power spectrum counting rate or content value, path profile then be using GPS information and when Between information draw aircraft flight path figure.

Wherein step (3) includes following procedure:

Nuclide identification method is characterized peak match method, by the characteristic peak data progress in peak-seeking result and nuclide library Match, calculate confidence level of coincideing, give up data of the identical confidence level less than 0.1, records the peak position information and therewith of remaining data Matched nuclide library information matches data result with the nucleic data in nuclide library, calculates confidence level, and confidence level is big It is small meet the data of threshold condition being arranged be left nuclide identification as a result, recording its peak position road location, nucleic title, type And confidence level, and its characteristic peak net counting rate and activity are calculated, if activity value is less than the minimum detectable activity value of system (MDA), then it is assumed that the nucleic is misrecognition nucleic, its all information is rejected from recognition result, the nucleic letter finally left Breath is the final result of nuclide identification；

Unmanned plane multi-element combination parameters detection and data processing method, further include processed offline method, described is offline Processing method the following steps are included:

(1) it under power spectrum processed offline mode, is made an uproar to the smooth denoising mode of spectral line using statistical method to reduce spectral line Sound, main spectral shape (PC' is extracted in original gamma spectra data set using the analysis method of principal component (PC) type s)；

(2) these main spectral shapes are used to reconstruct spectral line data collection, each spectral line after reconstruct all remains original letter Number not Noise；If spectral line road location is the road n, the matrix operation NASVD algorithm of m spectral line (m >=n) composition m × n is needed；

Remaining step of processed offline mode is identical as online processing mode.

A kind of unmanned plane multi-element combination parameters detection provided by the invention and data processing system, have following technology excellent Gesture:

Using the lanthanum bromide (LaBr of the high sodium iodide of detection efficient (NaI) crystal and high resolution₃) crystal composition combination Probe realizes unmanned plane in limited loading capacity by a variety of crystal conjunction measurings, detects more preferably gamma-spectrometric data, It avoids under high radioactivity background, only selects the detection of sodium iodide (NaI) crystal, obtained spectral line generates the case where accumulating； It avoids and only selects lanthanum bromide (LaBr₃) crystal, although resolution ratio is higher, detection efficient is inadequate, and the spectral line detected counts Very few situation.

Crystal insulating layer and crystal temperature effect monitoring device, keep the temperature every crystal, and real-time monitoring crystal temperature effect is simultaneously real When temperature feedback arrived into rear end²⁴¹Am radioactive source hardware spectrum-stabilizing device and the control of earth station's power spectrum and processing software, being capable of the moment Guarantee crystal work in the range of its normal work, avoids because to crystal damage caused by the ignoring of temperature, while Reference can be provided for spectrum stabilization, help judges whether the spectral line that crystal measures occurs temperature drift.

²⁴¹Am radioactive source hardware spectrum-stabilizing device solves the spectral line in the case where temperature change is indefinite and asking for temperature drift occurs Topic, avoids in traditional gamma spectrometry system that there is a situation where can only carry out spectrum stabilization after drifting about manually in spectral line.

Power spectrum control and processing system are also used to offline gamma-spectrometric data processing for on-line measurement and processing gamma-spectrometric data, I.e. under non-measured state, existing gamma-spectrometric data is imported, off-line analysis calculating is carried out to batch gamma-spectrometric data, forms completion DATA REASONING and processing system, avoid the mistake that easily occurs in export data manually and artificial treatment data.

Figure of description

Fig. 1 show overall system block diagram of the invention；

Fig. 2 is polycrystal coupling probe schematic diagram overlooking structure diagram of the present invention；

Fig. 3 is polycrystal coupling probe stereoscopic schematic diagram of the present invention；

Fig. 4 is crystal temperature effect monitoring device schematic diagram of the present invention；

Fig. 5 is DS18B20 Monobus network of the present invention；

Fig. 6 is integrated digital energy disperse spectroscopy overall structure of the present invention；

Fig. 7 is spectrum stabilization flow diagram of the present invention；

Fig. 8 is area ratio peak-seeking schematic diagram of the present invention；

Fig. 9 is power spectrum online processing process of the present invention；

Figure 10 is circle of equal altitudes of the present invention at figure

Figure 11 is path profile of the present invention at figure

Figure 12 is NASVD method noise reduction schematic diagram of the present invention.

Specific embodiment

The specific technical solution of the present invention is described with reference to the drawings.

As shown in Figure 1, a kind of unmanned plane multi-element combination parameters detection and data processing system, the system mainly include polycrystalline Body coupling probe, crystal temperature effect monitoring device,²⁴¹Am radioactive source hardware spectrum-stabilizing device, power spectrum control and processing system；Described Power spectrum control and processing system include power spectrum online processing and processed offline module；

The polycrystal coupling probe is sequentially connected²⁴¹Am radioactive source hardware spectrum-stabilizing device, power spectrum control and processing system System, the original power spectrum of polycrystal coupling probe pass to²⁴¹Am radioactive source hardware spectrum-stabilizing device；²⁴¹Am radioactive source hardware spectrum-stabilizing device The gamma-spectrometric data of conversion passes to power spectrum control and processing system；

Crystal temperature effect monitoring device is mounted on crystal；

Polycrystal coupling probe, crystal temperature effect monitoring device,²⁴¹Am radioactive source hardware spectrum-stabilizing device with power spectrum control with Processing system connection receives the order that power spectrum control is issued with processing system, and returns to state or data information.

Polycrystal coupling probe is as shown in Figures 2 and 3, including 11 liter of sodium iodide (NaI) crystal 1., 12 liters of iodine Change sodium (NaI) crystal 2.) and two 1.5 inches of lanthanum bromide (LaBr₃) crystal 3., photomultiplier tube and line related -4., and Etc. 5., every detector exports 1 road signal to shock absorbing foam, totally 4 road signal.Since sodium iodide (NaI) crystal of large volume detects It is high-efficient, but resolution ratio is not good enough, and under the special environment of high radioactivity etc., and the spectral line that sodium iodide (NaI) crystal measures holds It is also easy to produce accumulation, seriously affects measurement effect；Lanthanum bromide (LaBr₃) crystal high resolution, spectral line is not susceptible to accumulate, but due to The problems such as growth technique and cost, at present lanthanum bromide (LaBr₃) crystal can not also accomplish large volume, so detection efficient is lower. Make probe that can possess high detection efficient, high-resolution advantage simultaneously, and adapts to more measure environment, it is also contemplated that nobody The case where machine carry weight limits.

(2) crystal insulating layer

Crystal insulating layer is the heat preservation silicagel pad using 2mm thickness as heat preservation and vibration-absorptive material, wraps up three layers altogether in crystalline substance External side, in addition in crystal case, polyurethane foam is filled up in other spaces.Since different crystal has its corresponding temperature range to want It asks, the drift of the variation location the Hui Dao spectral line of temperature, or even damage crystal；Meanwhile in the temperature of Various Seasonal and aerial different height Degree also difference.Thus it is guaranteed that it is most important that crystal case internal temperature is relatively stable in the biggish environment of circumstance of temperature difference 's.

(3) crystal temperature effect monitoring device

Crystal temperature effect monitoring device is uniformly to be bonded 2 temperature sensors in each side of crystal, and every crystal pastes 8 altogether Temperature sensor, as shown in figure 4, taking the average value of 8 temperature sensors as the temperature value of the crystal, for the electricity for reducing system Road size and power consumption, choose can single line networking DS18B20 realize temperature measurement, as shown in Figure 5.The purpose designed in this way be for Temperature information is fed back the spectrum-stabilizing device to rear end in time by the temperature of every crystal of comprehensive monitoring, allows to send out in spectral line Spectral line is corrected in time in the case where raw temperature drift, while temperature information can also feed back power spectrum control and processing software, and It displays it, user is facilitated to observe the state of crystal at any time, if there is abnormal conditions, can stop measuring in time.

(4)²⁴¹Am radioactive source hardware spectrum-stabilizing device

²⁴¹Am radioactive source hardware spectrum-stabilizing device is realized that the general frame is as shown in FIG. 6 by integrated digital energy disperse spectroscopy, Bias is provided to photomultiplier tube by program-controlled high pressure, the output electric current of photomultiplier tube is put by charge sensitive preamplifier Greatly, differential process adjusting pulsewidth is then carried out again, finally enters multiple tracks analog front circuit.The 16bit of high-speed, high precision is differentiated Rate ADC is fast digitizing to original burst signal progress, and the digital signal of ADC output is passed by 1.8V low pressure LVCMOS communication Enter to complete the splicing, filtering forming, amplitude extraction etc. of data in FPGA.Amplitude information after extraction is transmitted to by parallel port At spectrum and spectral line be temporary and automatic spectrum stabilization in ARM, while ARM is also responsible for the Row control of whole system and communications command is rung It answers.Communication can be completed by RS232 or high speed USB 2.0.

Fig. 7 show spectrum stabilization flow diagram, sets the measurement energy range of spectrometer when opening spectrum stabilization first, and spectrometer can be certainly It is dynamic that reference source is calculated by this energy range²⁴¹The gamma-ray theoretical peak position of the 59.5keV of Am, then seeks in actual measurement spectrum It looks for and identifies²⁴¹The full energy peak of Am, calculates²⁴¹The full energy peak peak position of Am is then compared with theoretical peak position and judges spectrum Driftage degree, the software gain that energy disperse spectroscopy is adjusted if spectrum drift reaches correction threshold stablizes reference peak peak position, to make energy to be measured Area is also stable.

The present invention carries out peak position using the mode of peak area ratio and determines, finding peak position using peak area ratio can send out in spectral line The generation of spectrum drift is just recognized when raw slight unilateral broadening.Concrete methods of realizing is as follows, seeks obtaining Am- by simple comparison method first The general peak position of 241 full energy peaks seeks obtaining maximum value Pmax in Feng Qu.Am-241 full energy peak top can be approximately Gaussian peak, therefore Theoretically peak shape bilateral symmetry.As shown in figure 8, intercepting the spectral line at the top 15% of Am-241 full energy peak in practical programs design As spectrum stabilization reference peak, if the peak shape left margin of interception is CH_L, right margin CH_R, accurate floating number peak position is CH_P, amount to Number is A.Then,

WhereinFor the downward round numbers in floating number peak position road location,It rounds up number for floating number peak position road location,For CH_LCounting at road location.

It can get the accurate road location of peak position by formula (3) are as follows:

Peak position is calculated relative to simple comparison method, peak area ratio determines that the method for peak position is sensitiveer to peak position variation response, It is higher to find peak position precision.By above-mentioned area ratio, we can obtain accurate reference peak peak position information, next Peak position is corrected.Peak position correction is carried out by formula (5):

Wherein G_NFor the system software gain after peak position correction, CH_SETFor the theoretical peak position of the Am-241 of setting, CH_PTo work as Preceding actually measured Am-241 peak position, G_PFor the system software gain before correction.It calculates after new software gain every time then immediately The gain of spectrometer is updated, to achieve the purpose that fast automatic spectrum stabilization.

In order to guarantee the high sensitivity and high accuracy of reference peak bit correction, spectrometer uses the side of Approach by inchmeal theory peak position Method carries out peak drift correction.Spectrometer uses 65536 progress spectrum stabilizations always in spectrometer internal algorithm, enters spectrum drift correction for the first time Condition be to be greater than 500 with reference to counting at peak position road location, judgement actual measurement at this time refers to the difference of peak position and theoretical value, if difference is super It crosses 16 then to correct at once, otherwise continues to build up and count down to 1000 with reference to peak position and judge the difference with reference to peak position and theoretical peak position again Value, then corrects at once if more than 8, otherwise continues to build up to 2000 and judge peak driftage degree again, and so on, until peak, drift is small The spectral line for stopping correction when 0.5, and emptying Am-241 formation restarts to count and calculate and correct with reference to peak position.

(5) power spectrum control and processing system

1. power spectrum online processing function

Power spectrum online processing process uses multinomial to it as shown in figure 9, after the spectral line synthesis one that crystal of the same race is measured Least square fitting method carries out smooth denoising, and the basic thought of this method is with a polynomial of degree n and W=2m+1 modal data Gradually segmentation is fitted point, to achieve the purpose that smooth denoising；Then with Symmetric Zero area-method to the spectral line after smooth into Row peak-seeking, symmetrical " window " function and experiment modal data that it is zero that basic thought, which is by area, carry out convolution transform (in this system " window " function is used as using Gaussian function), it will be zero to the convolution transform of linear substrate, the place that only there is peak is not zero, Therefore the variation of peak type is reflected to the Symmetric Zero area conversion spectrum of raw spectral data, with looking for as unit of the standard deviation of conversion spectrum Peak when the positive extreme value of the ratio between conversion spectrum and its standard deviation appearance, and is more than when giving to look for peak threshold value, to be taken as peak.It obtains After the peak position of spectral line, that is, enter nuclide identification process, the nuclide identification method of the system is characterized peak match method, by peak-seeking knot Fruit is matched with the characteristic peak data in nuclide library, is calculated confidence level of coincideing, is given up data of the identical confidence level less than 0.1, The peak position information and matching nuclide library information etc. for recording remaining data, by the core in these data results and nuclide library Prime number calculates confidence level according to being matched, and the data that confidence level size meets the threshold condition being arranged are left nucleic and are known It is other and to calculate its characteristic peak net counting rate and activity as a result, record its peak position road location, nucleic title, type and confidence level, if Activity value be less than system minimum detectable activity value (MDA), then it is assumed that the nucleic be misrecognition nucleic, by its all information from It is rejected in recognition result, the nucleic information finally left is the final result of nuclide identification.Natural radionuclide²³⁸U、²³²Th、⁴⁰The content meter of K utilizes coefficient of overburden method at last, and the calculating of nucleic activity is to bring into the public affairs such as detection efficient, net counting rate Formula is calculated.Measurement data can be depicted as contour by power spectrum control with processing software in intrinsic call suffer Become the picture software Figure and path profile, medium altitude is to be depicted as region circle of equal altitudes using GPS information and power spectrum counting rate or content value, contour In figure can contamination to measured zone it is very clear, as shown in Figure 10；Path profile is then to utilize GPS information and time Information draws aircraft flight path figure, in path profile can path and measurement to fly past in time of measuring range one Mesh is clear, as shown in figure 11.

2. power spectrum processed offline function

Under power spectrum processed offline mode, online processing mode is different to the smooth denoising mode of spectral line, off-line mode is adopted Spectral line noise, i.e. NASVD (Noise Adjusted Singular Value Decomposition) are reduced with statistical method Method, as shown in Figure 12.This method is extracted in original gamma spectra data set using the analysis method of principal component (PC) type Then these main spectral shapes are used to reconstruct spectral line data collection by main spectral shape (PC's) out, each spectral line after reconstruct It all remains the original signal of the overwhelming majority and is practically free of noise.Its main feature is that needing m item to compose if spectral line road location is the road n The matrix that line (m >=n) forms m × n runs NASVD algorithm, and the smooth denoising effect of this method is better than least square fitting method, but Arithmetic speed is slower, is unsuitable for for online processing spectral line in real time.In addition to this, remaining step of processed offline mode, including Peak-seeking, the content calculating of natural radionuclide 238U, 232Th, 40K, the calculating of nucleic activity, circle of equal altitudes and path profile are drawn System, it is identical as online processing mode, refer to 1. content described in power spectrum online processing function.