CN101368918A - Detection method and detection system for packed armament material amount - Google Patents
Detection method and detection system for packed armament material amount Download PDFInfo
- Publication number
- CN101368918A CN101368918A CNA2008101671741A CN200810167174A CN101368918A CN 101368918 A CN101368918 A CN 101368918A CN A2008101671741 A CNA2008101671741 A CN A2008101671741A CN 200810167174 A CN200810167174 A CN 200810167174A CN 101368918 A CN101368918 A CN 101368918A
- Authority
- CN
- China
- Prior art keywords
- detector
- gamma ray
- ray radiator
- section
- cross
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a box-packed ordnance material quantity detection method and a detection system thereof. The method comprises the following steps: (1) measuring the standard equivalent density of each cross section of a standard box; (2) measuring the equivalent density distribution data of each cross section of a sample box; (3) comparing the equivalent density distribution data of each cross section of the sample box with the standard equivalent density distribution data; and emitting an alarm signal when the difference between the equivalent density of a certain cross section of the sample box and that of the standard box is greater than a set value. The system comprises a Gamma-radiation source, a detector, as well as a data acquisition and processing device. The detection method and the detection system can realize box-packed ordnance material quantity detection through portable equipment at a high detection speed, and the detection is convenient.
Description
Technical field
The invention belongs to the case material detection range, relate to a kind of method and detection system that does not need to unpack and to detect packed armament material amount particularly.
Background technology
Isotope is applied in both at home and abroad and has had history for a long time, mainly contains " three matters of fundamental importance " (densitometer, thickness meter, level-sensing device).Western countries have popularized isotope gauge in the late 1960s and the beginning of the seventies, use total amount and have surpassed 600,000 covers, and the output value accounts for ten thousand of total value of production in national economy/four or five, and profit for output value is than surpassing 1:0.5, and the returns of investment ratio reaches 1:9.China's isotope gauge also has large development, and particularly the container detection technique occupies the leading level in the world.
The most common is X-ray machine, and when we did x-ray fluoroscopy to hospital, X-ray penetrated clothes, skin and muscle, and the bone of inside of human body and internal organ clearly are presented on the video screen, and the doctor can find according to the x-ray fluoroscopy image whether our health has some pathology.In like manner, if during X ray passes closely knit, flawless metal level, intensity has just weakened greatly, if there are crack, pore, trachoma and loose place in the inside of metallic element, the X ray ratio be easier to by, it is just more more intense to pass the transmitted intensity that comes.If we put photographic negative at the back side of metallic element, just can check out the various defectives and the damage of metallic element inside visual in imagely.The principle that Here it is X defectoscope and industry CT are measured.
This method has obtained using widely in a lot of fields.People check various damages and defective in hull, pipeline, bridge and the element part with it.The archaeologist also finds out whether fossil animal and plant is arranged in the rock and need not a rock failure with it.The staff that airport, station, customs's frontier defense etc. are located checks luggage whether weapons and ammunitions, drugs and other various smuggling prohibited items are arranged in the case and bag with it, and is not only convenient but also quick.
But these system applies detect in packed armament material amount and have following problem:
1, price is higher.The most cheap x-ray imaging instrument needs 300,000 yuan, and a cover container examination system is worth and will reaches more than 50,000,000 yuan.
2, volume is big, and weight is big.When adopting x ray generator, need guard chamber, volume is big, can't move.And x-ray inspection equipment more complicated, it is convenient inadequately to use.
Summary of the invention
One object of the present invention is at the problems referred to above, and a kind of packed armament material amount detection method is provided, and it can realize the quantity of case dress ordnance property is detected with portable set, and its detection speed is fast, easy to detect.
Another object of the present invention is to provide a kind of detection system that adopts above-mentioned detection method that case dress ordnance property is detected.
For achieving the above object, the present invention adopts following technical scheme:
A kind of packed armament material amount detection method, it may further comprise the steps: 1) standard container of ordnance property is at the uniform velocity passed a sniffer of being made up of gamma ray radiator and detector, and receive this sniffer continuously at the measured transmitted intensity signal in each cross section of standard container, converse each cross section equivalence density, draw each cross section benchmark equivalence Density Distribution data of standard container; 2) ordnance property sales kit (SK) to be measured is at the uniform velocity passed above-mentioned sniffer at the same rate, receive this sniffer continuously at the measured transmitted intensity signal in each cross section of sales kit (SK), converse the equivalent density in each cross section, draw each cross section equivalence Density Distribution data of sales kit (SK); 3) each cross section of comparative sample case equivalence Density Distribution data and benchmark equivalence Density Distribution data when the equivalent density in a certain cross section of sales kit (SK) and the equivalent density of standard container differ by more than measuring error to a setting value, provide alerting signal.
Described setting value can be 1%-2%.
Because the measuring position mode is fixed, each cross section equivalence density of sales kit (SK) is relevant with the counting rate of detector output, it is the equivalent density value that the meter digit rate just can obtain sales kit (SK), if the equivalent density in a certain cross section of sales kit (SK) and standard container equivalence density differs by more than measuring error 2% when above, promptly draw sales kit (SK) goods and materials disappearance, and provide alerting signal.
The specification of the ordnance property packing case that is detected is 500mm * 400mm * 200mm, during detection the packing case thickness direction is passed between described gamma ray radiator and detector, and described gamma ray radiator and detector pitch are 300mm, and described gamma ray radiator adopts
137Cs activity 0.1mCi radioactive source.Because caesium source energy is 0.662MeV, penetration power is less relatively, protection easily, and the half life period is 30.27, generally speaking, instrument does not need to change radioactive source in the operating period.
Further, described step 1) also comprises will detect the resulting benchmark of various standard containers equivalence Density Distribution data storage earlier in database, during detection per sample the kind of case from this database, selects the equivalent Density Distribution data of corresponding benchmark.
Method of the present invention also comprises a step according to correction benchmark equivalence density datas such as radioactive source decay, detector efficiency or systematic errors.
In order to utilize detection method detection case dress ordnance property of the present invention, the invention provides a kind of detection system that is used to detect ordnance property in the ordnance property packing case, comprise a gamma ray radiator, a detector and data acquisition processing device, described gamma ray radiator and detector are oppositely arranged and are provided with a bogey that is used to place packing case between the two, can relatively move between this bogey and described gamma ray radiator and the detector, described data acquisition processing device is used to store, gather and handle the detection data from described detector.
Described gamma ray radiator adopts
137Cs activity 0.1mCi radioactive source, described detector are parallel-plate chamber or portable scintillation detector, and described bogey is a conveying belt, and the spacing between described gamma ray radiator and the detector is 300mm.Described bogey also can be a fixing plummer, and described gamma ray radiator and detector with respect to this fixedly plummer move, realize detection to each cross section equivalence density of sales kit (SK).
Described data acquisition processing device comprises multi-channel parallel counting acquisition system, light every timer counter frequency measurement card and computing machine, and this computing machine links every the timer counter frequency measurement by described multi-channel parallel counting acquisition system and light and is connected to described detector.Multiplexed detection device signal is exported after amplification, shaping, normalization, is gathered and counting by computing machine parallel high-speed capture card, and calculates the counting rate on every road.Case transmission location per sample fictionalizes the equivalent density in each cross section.Be the transient state density value of uclear scale, avoided the influence of wow and flutter measurement result.
Described computing machine also is connected with control device and the signalling alarm equipment that is used to control described conveying belt speed.
Adopt detection method of the present invention and detection system because the ordnance property incremental data of taking first measurement standard case to be adorned, measure the packed armament material amount data that need detection again, carry out the comparative analysis of ordnance property packing number data, provide testing result accurately, the inaccurate ordnance property of packing number is sent warning message.This is reduction system structure greatly just, has reduced equipment volume; Avoid the influence of system signal drift, power supply fluctuation equal error, improved the accuracy of measurement result.
The present invention adopts gamma ray radiator, because the gamma-rays penetration power is more intense, relatively be fit to the detection of case dress ordnance property, and the radiographic density analytical technology is carried out the system integration, and adopt way of contrast again, therefore the radioactive source activity that adopts can reduce greatly, the protective lead container weight is light, the vessel surface radiation dose is very little, and security is greatly enhanced, and has guaranteed user of service's the safety and the safety of the ordnance property that detects.
Detection method of the present invention and detection system are particularly useful for the load detection of class ordnance property of case.
Description of drawings
Fig. 1 is the structural representation of detection system of the present invention.
Shown in Figure 2 is detection system control block diagram of the present invention.
Shown in Figure 3 is standard ordnance property packing case equivalence densimetric curve.
Shown in Figure 4 is the ordnance property packing case equivalence densimetric curve that the quantity disappearance is arranged.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Shown in Figure 1 is the detection system that is used to detect ordnance property in the ordnance property packing case, it comprises a gamma ray radiator 3, a detector 2 and data acquisition processing device 5, described gamma ray radiator 3 and detector 2 are oppositely arranged and are provided with a bogey that is used to place packing case between the two, can relatively move between this bogey and described gamma ray radiator and the detector, described data acquisition processing device is used to store, gather and handle the detection data from described detector.
At bogey described in Fig. 1 is a conveying belt 4, ordnance material packing case 1 is placed on the conveying belt 4, described gamma ray radiator 3 and detector 2 are oppositely arranged on the above and below of conveying belt 4, when packing case 1 process radioactive source 3 and detector 2, receive detectable signals and be transported to data acquisition processing device 5 by detector 2.Described data acquisition processing device 5 comprises multi-channel parallel counting acquisition system, light every timer counter frequency measurement card and computing machine, and this computing machine links every the timer counter frequency measurement by described multi-channel parallel counting acquisition system and light and is connected to described detector 2.
Above-mentioned bogey is a fixing plummer (figure slightly) also, and ordnance property packing case 1 is placed on this fixedly on the plummer, and radioactive source 3 and detector 2 are adorned ordnance property with respect to fixing plummer motion scan case, and its detection principle is identical with Fig. 1 device.
The principle of detection case dress ordnance property of the present invention as shown in Figure 2, ordnance property standard container 1 is by conveying belt 4, through the measuring slit between radioactive source 3 and the detector 2, receive detectable signal by detector 2, detector signal after treatment, amplitude is consistent with pulsewidth, therefore measuring each point equivalence density only need count and get final product, so the present invention adopts multi-channel parallel counting acquisition system and a light every timer counter frequency measurement card (8 tunnel high-speed light are every 16 digit counters), measure the counting rate of every passage respectively, because multi-channel parallel counting acquisition system and light all are existing every timer counter frequency measurement card, can be positioned in the computing machine, are not described in detail in this.Detector 2 is measured each road signal, as calculated machine 5 amplify, shaping, normalization, and calculate the counting rate of pulse, its counting rate distribution curve is referring to equivalent densimetric curve shown in Figure 3, comprehensive each road signal can obtain the benchmark equivalence Density Distribution data of standard container, these benchmark equivalence Density Distribution data can deposit database in, and record files.During detection per sample the kind of case from this database, select corresponding benchmark equivalence Density Distribution data.When detecting other similar casees dress ordnance materials, because the measuring position is obtained by the same position sensor, its Density Distribution has comparability with benchmark equivalence density, when measuring result error is above greater than 2%, just judges that it is to lack ordnance property, provides alerting signal.Computing machine can control detector 2 and packing case 1 between relative moving speed.
Illustrate measuring process below:
Example 1: this systematic survey is unified size case dress sealing substance, and linear radiation source is relative with long scintillation detector to be installed, apart from 300mm, and radioactive source
137Cs activity 0.1mCi, radioactive source and detector all have plumbous matter shielding collimating aperture, and testee by measuring slit, is measured its equivalent density with 1cm/s speed, draw out whole object equivalence density profile.The image of elder generation's measurement standard case as shown in Figure 3, and is saved in database, measuring samples case again, and its equivalent density and standard container data relatively if its equivalent density exceeds 1% above error, as shown in Figure 4, but lack goods and materials with regard to the judgement sample case.
Example 2, this systematic survey are unified size case dress sealing substance, and linear radiation source is relative with long scintillation detector to be installed, apart from 300mm, and radioactive source
137Cs activity 0.1mCi, radioactive source and detector all have plumbous matter shielding collimating aperture, are fixed on the same mobile device, this device passes through packing case with 5cm/s speed, calculate the radiation meter digit rate in real time, calculate its equivalent density again, draw out whole object equivalence density profile.The image of elder generation's measurement standard case, and be saved in database, measuring samples case again, its equivalent density and standard container data relatively if exceed 1% above error, but lack goods and materials with regard to the judgement sample case.
Example 3, this systematic survey are unified size case dress sealing substance, linear radiation source and relative installation of linear scintillation detector matrix, and apart from 300mm, radioactive source
137Cs and detector all have plumbous matter shielding collimating aperture, and testee by measuring slit, calculates its equivalent density with 10cm/s speed in real time, draw out whole object equivalence density profile.The image of elder generation's measurement standard case, and be saved in database, measuring samples case again, its equivalent density and standard container data relatively, its equivalent density exceeds 1% above error, but lacks goods and materials with regard to the judgement sample case.
Be example with portable scintillation detector below, use caesium-137, the calculating of measuring error is carried out in 0.1mCi caesium source:
(L * W * H mm) is no more than 500mm * 400mm * 200mm to the physical dimension of the packing case of general ordnance property (particularly main use object---the bullet of native system), and (G kg) is no more than 50kg to weight, so its density (ρ, g/cm
2) be no more than G/ ((50 * 40 * 20)=1.25g/cm of L * W * H)=50000/
3
It is 0.052 that radioactive source adopts the linear absorption coefficient (μ) of caesium-137, and the product of Media density and thickness (ρ d) is 1.25*20=25.According to decay rule formula I=I
0e
-μ ρ dHaving gamma-rays to pass the packing case attenuation multiple is I/I
0=e
-0.052*25=3.67 times.
Detector is selected portable scintillation detector for use.Its efficient (η) is 30% (detection efficiency of scintillation detector own) generally speaking, and its crystal detection receptor area (S) is 40 * 10=400cm
2(the wide 40cm of packing case, general crystal width is 10cm.Because packing case transmits on conveyer, so it can be satisfied the demand fully), now get detector apart from radioactive source (R) 300mm (the high 20cm of packing case adds other spaces 10cm, and this hypothesis can meet the demands fully), then
The ratio (a) in the shared radioactive area of crystal detection receptor area is:
a＝S/4πR
2
＝400/(4×3.14×30×30)
≈0.035
The comprehensive utilization ratio of ray (b) is:
b＝aηI
0/I
＝0.035×0.3/3.67
≈0.0029
Design Measuring Time (T) is 20s (Measuring Time T.T.), according to our design to native system, gets 0.1mCi caesium source and estimates that its ray pulse (ω) is 3.7 * 10
6(parameter own is because the particle beams that the activity in the caesium source of 1mCi was promptly launched in 1 second is 3.7 * 10 to the particle beams/second
7Individual unit), the particle beams counting (c) that then passes packing case is:
c＝Tbω
＝20×3.7×10
6×0.0029
＝214600
Statistic fluctuation then
Measuring error is
So in 3 times of standard variances, it measures degree of confidence is 99.9%, measuring error is 0.66%, coincidence measurement error requirements (1%).
Annotate: 0.1mCi caesium source (caesium source value is big more, and error is more little, so the native system error can meet the demands fully) (getting the measuring error of calculating in 0.1mCi caesium source is 0.66%, coincidence measurement error requirements 1%).
Radsafe is analyzed:
0.1mCi 1 hour suffered effective dose of different distance contact saw Table 2 when caesium source radioactive source was exposed fully
1 hour suffered effective dose of different distance contact when table 2 radioactive source is exposed fully
| Apart from m | 0.05 | 0.5 | 1 | 2 | 5 | 10 |
| Dosage mSv | 0.112 | 0.0012 | 0.00028 | 0.00007 | 0.000011 | 0.0000028 |
0.1mCi when line source Cs-137 radioactive source exposed, the effective dose that different distance contact was received in 1 hour was got it and 1/10th is reference value.The container of radioactive source is the plumbous matter column of wall thickness 2.5cm, it is about 4 to the radioactive source attenuation multiple, the dose rate that is vessel surface is less than 0.0026mSv/h, measure every day by the staff and contact radiation source container surface 1 hour, calculated in 7 hours at 1 meter, the suffered radiation dose of the personnel of its operating instrument is 0.002649mSv/h, annual work 300 days, and the radiation dose of being accepted is 0.79mSv.
According to national radiation protection standard GB18871-2002 relevant regulations, continuous 5 years suffered exposure doses of vocational technology personnel on average are no more than 20mSv, and one time exposure is no more than 50mSv.Public personnel year effective dose is 1mSv.1 year suffered radiation dose of the personnel of operating instrument is lower than the limit value that national public personnel stipulate, so the native system radiation protection is safe.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. packed armament material amount detection method, it is characterized in that may further comprise the steps: 1) standard container of ordnance property is at the uniform velocity passed a sniffer of forming by gamma ray radiator and detector, and receive this sniffer continuously at the measured transmitted intensity signal in each cross section of standard container, converse each cross section equivalence density, draw each cross section benchmark equivalence Density Distribution data of standard container; 2) ordnance property sales kit (SK) to be measured is at the uniform velocity passed above-mentioned sniffer at the same rate, receive this sniffer continuously at the measured transmitted intensity signal in each cross section of sales kit (SK), converse the equivalent density in each cross section, draw each cross section equivalence Density Distribution data of sales kit (SK); 3) each cross section of comparative sample case equivalence Density Distribution data and benchmark equivalence Density Distribution data when the equivalent density in a certain cross section of sales kit (SK) and the equivalent density of standard container differ by more than measuring error to a setting value, provide alerting signal.
2. packed armament material amount detection method according to claim 1 is characterized in that: described setting value is to be 1%-2%.
3. packed armament material amount detection method according to claim 1, it is characterized in that: the specification of the ordnance property packing case that is detected is 500mm * 400mm * 200mm, during detection the packing case thickness direction is passed between described gamma ray radiator and detector, described gamma ray radiator and detector pitch are 300mm, and described gamma ray radiator adopts
137Cs activity 0.1mCi radioactive source.
4. packed armament material amount detection method according to claim 1, it is characterized in that: described step 1) also comprises will detect the resulting benchmark of various standard containers equivalence Density Distribution data storage earlier in database, during detection per sample the kind of case from this database, selects the equivalent Density Distribution data of corresponding benchmark.
5. packed armament material amount detection method according to claim 4 is characterized in that: also comprise a step according to radioactive source decay, detector efficiency or systematic error correction benchmark equivalence density data.
6. one kind requires 1 described packed armament material amount detection method to detect the detection system of ordnance property packing case according to aforesaid right, it is characterized in that: comprise a gamma ray radiator, a detector and data acquisition processing device, described gamma ray radiator and detector are oppositely arranged and are provided with a bogey that is used to place packing case between the two, can relatively move between this bogey and described gamma ray radiator and the detector, described data acquisition processing device is used to store, gather and handle the detection data from described detector.
7. detection system according to claim 6 is characterized in that: described gamma ray radiator adopts
137Cs activity 0.1mCi radioactive source, described detector are parallel-plate chamber or portable scintillation detector, and described bogey is a conveying belt, and the spacing between described gamma ray radiator and the detector is 300mm.
8. detection system according to claim 6 is characterized in that: described gamma ray radiator adopts
137Cs activity 0.1mCi radioactive source, described detector is parallel-plate chamber or portable scintillation detector, described bogey is a fixing plummer, and described gamma ray radiator and detector with respect to this fixedly plummer move, the spacing between described gamma ray radiator and the detector is 300mm.
9. detection system according to claim 6, it is characterized in that: described data acquisition processing device comprises multi-channel parallel counting acquisition system, light every timer counter frequency measurement card and computing machine, and this computing machine links every the timer counter frequency measurement by described multi-channel parallel counting acquisition system and light and is connected to described detector.
10. detection system according to claim 9 is characterized in that: described computing machine also is connected with control device and the signalling alarm equipment that is used to control described conveying belt speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810167174 CN101368918B (en) | 2008-10-07 | 2008-10-07 | Detection method and detection system for packed armament material amount |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810167174 CN101368918B (en) | 2008-10-07 | 2008-10-07 | Detection method and detection system for packed armament material amount |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101368918A true CN101368918A (en) | 2009-02-18 |
| CN101368918B CN101368918B (en) | 2010-12-22 |
Family
ID=40412836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810167174 Expired - Fee Related CN101368918B (en) | 2008-10-07 | 2008-10-07 | Detection method and detection system for packed armament material amount |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101368918B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632838A (en) * | 2018-12-29 | 2019-04-16 | 上海歌地催化剂有限公司 | Automotive catalyst coating uniformity detection method and device |
| CN111079984A (en) * | 2019-11-26 | 2020-04-28 | 拉货宝网络科技有限责任公司 | Method for predicting number of goods in truck |
| CN111835981A (en) * | 2020-07-01 | 2020-10-27 | 上海视界纵横智能科技有限公司 | Industrial scanning equipment and method capable of identifying transmission speed |
| CN113076838A (en) * | 2021-03-25 | 2021-07-06 | 中国铁路北京局集团有限公司北京科学技术研究所 | Method, system, equipment and storage medium for identifying marshalling sequence of railway container station box numbers |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1292961C (en) * | 2002-01-07 | 2007-01-03 | 北京清大科技股份有限公司 | On-line detector for regular pieces inside product packing box |
| CN1779451B (en) * | 2004-11-26 | 2010-04-28 | 清华大学 | Back scattering safety inspector for liquid by radioactive resource |
| JP4675133B2 (en) * | 2005-04-08 | 2011-04-20 | 株式会社日立製作所 | Density analysis method from X-ray CT data, computer program for executing density analysis method, and density analysis system |
| JP5004478B2 (en) * | 2006-02-17 | 2012-08-22 | 日立造船株式会社 | Object discrimination method and discrimination device |
| CN101082595B (en) * | 2006-06-01 | 2010-12-08 | 邸生才 | Cigarette package denseness on-line detection device and method |
| CN101021493A (en) * | 2007-02-16 | 2007-08-22 | 邸生才 | X-ray detecting device for finished cigarette pack bar-missing and cigarette bar box-missing |
-
2008
- 2008-10-07 CN CN 200810167174 patent/CN101368918B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632838A (en) * | 2018-12-29 | 2019-04-16 | 上海歌地催化剂有限公司 | Automotive catalyst coating uniformity detection method and device |
| CN111079984A (en) * | 2019-11-26 | 2020-04-28 | 拉货宝网络科技有限责任公司 | Method for predicting number of goods in truck |
| CN111079984B (en) * | 2019-11-26 | 2023-05-12 | 拉货宝网络科技有限责任公司 | Method for predicting number of truck material loads |
| CN111835981A (en) * | 2020-07-01 | 2020-10-27 | 上海视界纵横智能科技有限公司 | Industrial scanning equipment and method capable of identifying transmission speed |
| CN113076838A (en) * | 2021-03-25 | 2021-07-06 | 中国铁路北京局集团有限公司北京科学技术研究所 | Method, system, equipment and storage medium for identifying marshalling sequence of railway container station box numbers |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101368918B (en) | 2010-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9268043B2 (en) | Radiation-monitoring system with correlated hodoscopes | |
| US8275567B2 (en) | Correction of a radioactivity measurement using particles from atmospheric source | |
| CN104198503A (en) | Online coal ash content measurement system and method based on natural gamma rays | |
| CN103913762B (en) | A kind of passage radioactive material quality detection supervising device and detection method | |
| CN101368918B (en) | Detection method and detection system for packed armament material amount | |
| Abbasi et al. | Distribution of natural and anthropogenic radionuclides and associated radiation indices in the Southwestern coastline of Caspian Sea | |
| Smith et al. | Signatures and Methods for the Automated Nondestructive Assay of ${\rm UF} _ {6} $ Cylinders at Uranium Enrichment Plants | |
| Bukartas et al. | A Bayesian method to localize lost gamma sources | |
| Erhardt et al. | Deposition measurements from the full-scale radiological dispersal device field trials | |
| Shohani et al. | A new method of gamma level gauge using a position-sensitive sensor with rod plastic scintillator | |
| Xu et al. | Measurement of talc in flour by the 14 MeV neutron activation analysis method | |
| CN201196635Y (en) | Integration system used for active material detection and X ray radiation imaging | |
| Finck et al. | Maximum detection distances for gamma emitting point sources in mobile gamma spectrometry | |
| CN101936923A (en) | Non-contact material level measuring device | |
| Yamada et al. | Performance evaluation of the equipment for measuring radioactivity in whole foodstuffs without destructive sample preparation developed after the Fukushima NPP accident | |
| JP5926362B1 (en) | Radioactivity concentration measuring apparatus and radioactivity concentration measuring method | |
| Classen | Scoping Study: Scintillator Array for Fission Correlation Studies | |
| Li et al. | The development of a clearance level radioactive waste measurement system using an array of NaI (Tl) detectors | |
| McKinney | Radiation techniques for process measurements | |
| JP2015111069A (en) | Radioactivity inspection device and radioactivity inspection method | |
| Lv et al. | Mechanism of measuring ash with low-energy gamma rays for equal coal seam thickness | |
| Giuseppe et al. | Nuclear fission as a tool to contrast the contraband of special nuclear material | |
| RU2339021C2 (en) | Test sample | |
| Frazier Bronson et al. | DESIGN AND PERFORMANCE TESTING OF THE FIU/DOE INTERNAL/EXTERNAL PIPE CONTAMINATION ASSESSMENT SYSTEM. | |
| CN104390677B (en) | The background radiation amendment measuring method and its system of passive nuclear level sensing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20111007 |