CN102621170A - Method for automatically determining measurement time in detection of energy spectrometer - Google Patents
Method for automatically determining measurement time in detection of energy spectrometer Download PDFInfo
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- CN102621170A CN102621170A CN2012100615577A CN201210061557A CN102621170A CN 102621170 A CN102621170 A CN 102621170A CN 2012100615577 A CN2012100615577 A CN 2012100615577A CN 201210061557 A CN201210061557 A CN 201210061557A CN 102621170 A CN102621170 A CN 102621170A
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Abstract
The invention discloses a method for automatically determining measurement time in the detection of an energy spectrometer. The method is characterized by comprising the following steps of: (1) tracking and monitoring data collected by the energy spectrometer in real time for a sample to be measured and caching the data; (2) carrying out data pretreatment on the spectral line data tracked and cached in the step (1); (3) acquiring a stability parameter according to the spectral line data tracked currently and the spectral line data treated in the step (2); (4) carrying out stability judgment, automatically judging whether the collection of a current spectral line meets a stability condition or not; and automatically stopping the measurement sampling of the sample if the condition is met, otherwise continuing the measurement sampling and tracking the spectral line data if the condition is not met. By using the method, the measurement time can be automatically determined in the process that the sample is measured by the energy spectrometer; the measurement efficiency of the sample is effectively improved; the influence of environmental change on a measurement result is effectively reduced; and meanwhile, the uncertainty of the measurement time judged manually is reduced.
Description
Technical field
The present invention relates to a kind of method of in energy spectrometer is surveyed, confirming Measuring Time automatically.
Background technology
High energy particle detection energy spectrometer like the NaI energy spectrometer, is extensively adopted in building materials radiological measuring and soil radioactivity detection, and is become one of thermometrically equipment of GB requirement.The NaI energy spectrometer is general to adopt abundant vitriol chamber as shielding, and NaI scintillation crystal coupling photomultiplier constitutes gamma-ray detector, and the high-energy photon of sample radiation is surveyed and energy discrimination.Because the NaI energy spectrometer has good environment alpha ray shield condition, the NaI scintillation crystal possesses higher detection efficiency and energy resolution preferably again, thus the NaI detector can measure comparatively accurately the sample of low-activity (radium-226 in the sample (
226Ra), thorium-232 (
232Th), kalium-40 (
40When K) the specific radioactivity sum surpassed 37Bq/kg, when spreading factor was 1, uncertainty of measurement was not more than 20%).Because sample activity is very low, in order to obtain enough detection countings, need long Measuring Time: it is generally acknowledged that Measuring Time is long more, the statistical counting that obtains is many more, and it is more little that spectral line is carried out the statistical error that the spectrum unscrambling analysis brings.Yet Measuring Time is long, has a strong impact on the detection efficiency of sample on the one hand, also can receive the influence of factors such as environment temperature, stability of instrument simultaneously, thereby influence measurement result.
In present blind appearance is detected, measure the experience that often depends on the energy spectrometer user of choosing of duration, this can increase the uncertainty of measurement result.
And the needed Measuring Time of the sample of different activity is also different, and the sample of low-activity often needs the longer measurement sampling time with respect to the sample of high activity in measurement; Yet because sample activity is unknown in the blind appearance detection; The experimenter tends to adopt the long as far as possible time to sample, and can waste unnecessary Measuring Time like this, influences the detection efficiency of sample; Simultaneously, also can increase the probability of unfavorable factor introducing measurement results such as environmental change.And, if find that when sample measurement is accomplished Measuring Time is not enough, then generally can require this sample to remeasure, influence efficiency of measurement more.
Summary of the invention
Technical matters to be solved by this invention is to the deficiency of above-mentioned existence a kind of method of in energy spectrometer is surveyed, confirming Measuring Time automatically to be provided.This method can not only effectively improve the efficiency of measurement of sample, reduces the influence of environmental change to measurement result, and can reduce the artificial uncertainty of judging Measuring Time.。
The present invention addresses the above problem the technical scheme that is adopted to be:
A kind of method of in energy spectrometer is surveyed, confirming Measuring Time automatically is characterized in that may further comprise the steps:
A: in real time sample is carried out the tracking and monitoring energy spectrometer and measure spectral line data and the buffer memory of gathering;
B:, carry out the data pre-treatment to the spectral line data of trace cache in the steps A;
C: the spectral line data according to handling among the spectral line data of current tracking and the step B is obtained stability parameter;
D: carry out judgement of stability, judge automatically whether the collection of current spectral line satisfies stable condition; If satisfy condition, then stop the measurement collection of sample automatically, if do not satisfy condition, continue to measure sampling and follow the tracks of spectral line data.
Press such scheme, adopt the energy spectrometer acquisition module that sample is carried out the spectral line collection, adopt the energy spectrometer control module that spectral line data is followed the tracks of and detect also buffer memory, data pre-treatment, obtain stability parameter and spectral line data is carried out judgement of stability.
Press such scheme; The method that follow the tracks of to detect image data in the steps A is for obtaining the spectral line data of current collection with constant duration or according to the certain time interval cycle, and the mode of opening up special data space or setting up file is carried out buffer memory with this image data.
Press such scheme, described constant duration is 20s-800s.
Press such scheme, the data pre-treatment described in the step B comprises Filtering Processing and/or normalization processing.
Press such scheme, described Filtering Processing is location, the road length according to energy spectrometer, and image data is carried out smothing filtering, and filter length is at 0 to 300 point.
Press such scheme, described normalization is treated to the time normalization processing and/or the normalization of sample activity is handled; Described time normalization is treated to the collection spectral line data divided by current Measuring Time, obtains the image data in the unit interval; Described normalization is treated to gathering the gross-count rate of spectral line data divided by spectral line data to activity, obtains the collection spectral line data in the unit activity.
Press such scheme, the gross-count rate of described spectral line data is the Measuring Time of the total counting of spectral line divided by the track record data first time.
Press such scheme, the method for obtaining stability parameter described in the step C comprises gathering dynamically carrying out Calculation on stability and/or the situation of change of sampling spectral line resolving spectra being carried out Calculation on stability of spectral line shape.
Press such scheme, described dynamic change to spectral line shape is carried out Calculation on stability for the current spectrum wire shaped is poor with collection spectral line shape once preceding or preservation several times, with the curve of difference dynamic change as stability parameter.
Press such scheme, spectral line data is corresponding successively subtracts each other described difference dynamic changing curve in order all collection spectral line data and last time are followed the tracks of, and asks the average of the quadratic sum of sequence then.
Press such scheme; Described situation of change to the spectral line resolving spectra is carried out Calculation on stability for current spectral line and spectral line once preceding or that preserve are several times done the difference contrast; Separate and obtain that each gathers the content and the interior external exposure index of element in the spectral line behind the analysis of spectrum, with the curve of each item resolving spectra dynamic change as stability curve.
By technique scheme, the described analysis of spectrum of separating adopts least square-direct matrix.
Press such scheme, the judgement of stability described in the step D adopts the method for a subthreshold to judge.
Press such scheme, the judgement of stability described in the step D adopts the method for sets of threshold values to judge.
Compared with prior art, the present invention has obtained tangible technique effect:
1, keep watch on spectral line automatically, through Calculation on stability and differentiation, definite automatically sample is reasonably measured acquisition time.
2, under the inconsistent prerequisite of Measuring Time under the different activity samples, confirm to measure the sampling duration automatically and avoided the long-time time waste that brings of measuring of traditional employing, guarantee to have improved the efficient of sample measurement under the prerequisite of measurement result.
3, confirm rational and effective measurement duration automatically, avoided of the interference of adverse effect factors such as environmental change, increased the accuracy of measurement result measurement result.
Description of drawings
Fig. 1 is the method flow diagram of one embodiment of the invention.
Fig. 2 is a sample measurement spectrum in the embodiment of the invention.
Fig. 3 is a spectral line shape stability curve in the embodiment of the invention.
Fig. 4 is radium element spectral line resolving spectra stability curve among the embodiment among the present invention.
Fig. 5 is thorium element spectral line resolving spectra stability curve among the embodiment among the present invention.
Fig. 6 is potassium element spectral line resolving spectra stability curve among the embodiment among the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the invention is described further.
As shown in Figure 1, the present invention may further comprise the steps successively:
A: in real time sample is carried out the tracking and monitoring energy spectrometer and measure spectral line data and the buffer memory of gathering;
B:, carry out the data pre-treatment to the spectral line data of trace cache in the steps A;
C: the spectral line data according to handling among the spectral line data of current tracking and the step B is obtained stability parameter;
D: carry out judgement of stability, judge automatically whether the collection of current spectral line satisfies stable condition; If satisfy condition, then stop the measurement collection of sample automatically, if do not satisfy condition, continue to measure sampling and follow the tracks of spectral line data.
Wherein, adopt the energy spectrometer acquisition module that sample is carried out the spectral line collection, the energy spectrometer control module is followed the tracks of spectral line data and is detected also buffer memory, data pre-treatment, obtains stability parameter and spectral line data is carried out judgement of stability.
Described acquisition module and control module may reside in equipment or the instrument, perhaps are separated from each other, and are connected with agreement and communicate by letter through certain communication interface.Acquisition module can be under the control of control module acquired signal, perhaps stop acquired signal.And can carry out corresponding data processing in control module inside.Described control module can be flush bonding processor, computing machine or other controls and computing equipment.What control module realized Measuring Time confirms to be divided into four steps automatically, all accomplishes in that control module is inner, is followed successively by that spectral line is traced and monitored, buffer memory, spectral line data pre-treatment, spectral line Calculation on stability and spectral line determination of stability to gathering.
For when the energy spectrometer acquisition module begins to sample to sample, to rise, control module starts timer in the method for tracing and monitoring energy spectrometer measurement image data described in the steps A, and current spectral line data is preserved at every interval 600 seconds.Store method is the spatial cache P (j) that opens up one 4096 length; J=1,2,3 ..., 4096.Store the numerical value in 4096 roads in the current spectral line.
As shown in Figure 2, four curves are respectively the spectral line of the 7th secondary tracking, the 14th secondary tracking, the 21st secondary tracking and the 28th secondary tracking among the figure.
Spectral line pre-treatment among the step B has comprised spectral line filtering and time normalization and three processing modes of sample activity normalization.Spectral line data P (j) formula below constituting carries out filtering.Filtering Processing is location, the road length according to energy spectrometer, and sampled data is carried out smothing filtering, and filter length is at 0 to 300 point.Obtain filtered data P
SM(j); J=1,2,3 ..., 4096.
The measurement sampling needle of spectral line is to P
SM(j) spectral line is carried out time normalization.Normalized computing formula is following:
P
ST(j)＝P
SM(j)/t(i)；j＝1，2，3，...，4096
It is the i time surveillance and tracking that i representes current, and the time is t (i)=600 * i, and unit is second.
Obtain the spectral line P of time normalization
ST(j).
To P
ST(j) spectral line is carried out activity normalization, wherein activity adopts gross-count rate Cts (1) expression of spectral line when following the tracks of for the first time.
Cts (1) calculates with following formula:
The normalized formula of activity is following:
P
SA(j)＝P
ST(j)/Cts(1)；j＝1，2，3，...，4096
Obtain the normalized spectral line P of activity
SA(j);
Get Calculation on stability in the described control module and comprise two computing method, be respectively spectral line shape Calculation on stability and spectral line resolving spectra Calculation on stability.
When adopting the spectral line shape Calculation on stability, need current tracking and normalized spectral line P
SA(j) and last the tracking and spectral line P that normalization obtains
SA_Last(j), adopt following formula computational stability parameter:
Q is the stability parameter of obtaining.
The spectral line that Fig. 3 obtains for each calculating gained spectral line shape stability parameter, up to the 10th time, stability parameter satisfies condition, and stops sampled measurements.
When adopting the Calculation on stability of spectrum unscrambling result of calculation, need current tracking and filtering spectral line P afterwards
SM(j) and last the tracking and the spectral line P of filtering
SM_Last(j): respectively these two spectral lines are separated analysis of spectrum, spectrum unscrambling adopts the algorithm of least square-inverse matrix to obtain radium in the spectral line, thorium, other content of three kinds of nucleic branches of potassium, is expressed as C
Ra, C
ThAnd C
KFollow the tracks of the C that spectral line obtains in conjunction with last
Ra_LastC
Th_LastAnd C
L_LastFormula carries out Calculation on stability below adopting:
Q
R＝|C
Ra-C
Ra_Last|
Q
T＝|C
Th-C
Th_Last|
Q
K＝|C
K-C
K_Last|
Q
R, Q
TAnd Q
KBe the stability parameter of calculating.
Described stability criterion adopts the way of a subthreshold; In the spectral line shape determination of stability, we adopt threshold value Threshold＜0.04 as stable condition, in spectral line resolving spectra stability criterion; We adopt sets of threshold values, satisfy following three conditions simultaneously:
Fig. 4, Fig. 5, Fig. 6 are the spectral line that the stability parameter of each resolving spectra obtains radium, thorium, three kinds of nucleic of potassium, and up to the 15th time, stability condition satisfies, and stops sampled measurements.
With current stability parameter and threshold ratio, if stability parameter satisfies the preset threshold condition, promptly stop to measure sampling.If do not satisfy, then continue to get back to the first step, the surveillance and tracking spectral line.
Claims (15)
1. method of in energy spectrometer is surveyed, confirming Measuring Time automatically is characterized in that may further comprise the steps:
A: in real time sample is carried out the tracking and monitoring energy spectrometer and measure spectral line data and the buffer memory of gathering;
B:, carry out the data pre-treatment to the spectral line data of trace cache in the steps A;
C: the spectral line data according to handling among the spectral line data of current tracking and the step B is obtained stability parameter;
D: carry out judgement of stability, judge automatically whether the collection of current spectral line satisfies stable condition; If satisfy condition, then stop the measurement collection of sample automatically, if do not satisfy condition, continue to measure sampling and follow the tracks of spectral line data.
2. the method for in energy spectrometer is surveyed, confirming Measuring Time automatically according to claim 1; It is characterized in that adopting the energy spectrometer acquisition module that sample is carried out the spectral line collection, adopt the energy spectrometer control module that spectral line data is followed the tracks of and detect also buffer memory, data pre-treatment, obtain stability parameter and spectral line data is carried out judgement of stability.
3. the method for in energy spectrometer is surveyed, confirming Measuring Time automatically according to claim 1 and 2; It is characterized in that in the steps A following the tracks of the method that detects image data for obtaining the spectral line data of current collection, and the mode of opening up special data space or setting up file is carried out buffer memory with this image data with constant duration or according to the certain time interval cycle.
4. the method for in energy spectrometer is surveyed, confirming Measuring Time automatically according to claim 3 is characterized in that described constant duration is 20s-800s.
5. the method for in energy spectrometer is surveyed, confirming Measuring Time automatically according to claim 1 and 2 is characterized in that the data pre-treatment described in the step B comprises Filtering Processing and/or normalization processing.
6. the method for in energy spectrometer is surveyed, confirming Measuring Time automatically according to claim 5 is characterized in that described Filtering Processing is location, the road length according to energy spectrometer, and image data is carried out smothing filtering, and filter length is at 0 to 300 point.
7. the method for in energy spectrometer is surveyed, confirming Measuring Time automatically according to claim 5 is characterized in that described normalization is treated to the time normalization processing and/or the normalization of sample activity is handled; Described time normalization is treated to the collection spectral line data divided by current Measuring Time, obtains the image data in the unit interval; Described normalization is treated to gathering the gross-count rate of spectral line data divided by spectral line data to activity, obtains the collection spectral line data in the unit activity.
8. the method for in energy spectrometer is surveyed, confirming Measuring Time automatically according to claim 7, the gross-count rate that it is characterized in that described spectral line data is the Measuring Time of the total counting of spectral line divided by the track record data first time.
9. the method for in the energy spectrometer measuring process, confirming Measuring Time automatically according to claim 1 and 2 is characterized in that the method for obtaining stability parameter described in the step C comprises gathering dynamically carrying out Calculation on stability and/or the situation of change of sampling spectral line resolving spectra being carried out Calculation on stability of spectral line shape.
10. the method for in the energy spectrometer measuring process, confirming Measuring Time automatically according to claim 9; It is characterized in that described dynamic change to spectral line shape carries out Calculation on stability for the current spectrum wire shaped is poor with collection spectral line shape once preceding or preservation several times, with the curve of difference dynamic change as stability parameter.
11. according to claim 10ly in the energy spectrometer measuring process, automatically confirm time method; It is characterized in that spectral line data is corresponding successively subtracts each other described difference dynamic changing curve in order all collection spectral line data and last time are followed the tracks of, and asks the average of the quadratic sum of sequence then.
12. the method for in the energy spectrometer measuring process, confirming Measuring Time automatically according to claim 9; It is characterized in that it is that current spectral line and spectral line once preceding or that preserve are several times done the difference contrast that described situation of change to the spectral line resolving spectra is carried out Calculation on stability; Separate and obtain that each gathers the content and the interior external exposure index of element in the spectral line behind the analysis of spectrum, with the curve of each item resolving spectra dynamic change as stability curve.
13. the method for in the energy spectrometer measuring process, confirming Measuring Time automatically according to claim 12 is characterized in that the described analysis of spectrum of separating adopts least square-direct matrix.
14. the method for in the energy spectrometer measuring process, confirming Measuring Time automatically according to claim 10 is characterized in that the judgement of stability described in the step D adopts the method for a subthreshold to judge.
15. the method for in the energy spectrometer measuring process, confirming Measuring Time automatically according to claim 12 is characterized in that the judgement of stability described in the step D adopts the method for sets of threshold values to judge.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104239709A (en) * | 2014-09-05 | 2014-12-24 | 西安奥华电子仪器有限责任公司 | Method for determining yield of stratum element logging instrument by virtue of spectrum unfolding |
| CN104239710A (en) * | 2014-09-05 | 2014-12-24 | 西安奥华电子仪器有限责任公司 | Method for confirming yield through spectrum unfolding analysis of stratum element logging instrument |
| CN111032997A (en) * | 2017-12-26 | 2020-04-17 | 中国石油天然气股份有限公司 | Gamma-ray energy spectrum unscrambling method and device for element capture energy spectrum logging |
| CN111551978A (en) * | 2020-05-08 | 2020-08-18 | 中国辐射防护研究院 | Method for evaluating uncertainty of radioactive soil sample sampling process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0737539A (en) * | 1993-07-20 | 1995-02-07 | Jeol Ltd | Element analyzer using wavelength dispersing spectroscope energy dispersing spectroscope |
| JP2000030657A (en) * | 1998-07-13 | 2000-01-28 | Anelva Corp | Appearance mass analyzing method |
| CN1295256A (en) * | 1999-08-18 | 2001-05-16 | 上海伽玛射线技术有限公司 | Specific radioactivity measuring method and equipment |
| JP3790643B2 (en) * | 1999-07-07 | 2006-06-28 | 日本電子株式会社 | Surface analyzer with energy dispersive X-ray detector |
| GB2463402A (en) * | 2007-06-20 | 2010-03-17 | Thermo Electron Scient Instr | Processing of spectrometer pile-up events |
| CN101806910A (en) * | 2010-05-11 | 2010-08-18 | 西北核技术研究所 | Method and device for absolutely measuring for radioactive gas nuclide activity |
| JP4822826B2 (en) * | 2005-12-06 | 2011-11-24 | 日本電子株式会社 | Particle analysis method and apparatus |
-
2012
- 2012-03-09 CN CN 201210061557 patent/CN102621170B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0737539A (en) * | 1993-07-20 | 1995-02-07 | Jeol Ltd | Element analyzer using wavelength dispersing spectroscope energy dispersing spectroscope |
| JP2000030657A (en) * | 1998-07-13 | 2000-01-28 | Anelva Corp | Appearance mass analyzing method |
| JP3790643B2 (en) * | 1999-07-07 | 2006-06-28 | 日本電子株式会社 | Surface analyzer with energy dispersive X-ray detector |
| CN1295256A (en) * | 1999-08-18 | 2001-05-16 | 上海伽玛射线技术有限公司 | Specific radioactivity measuring method and equipment |
| JP4822826B2 (en) * | 2005-12-06 | 2011-11-24 | 日本電子株式会社 | Particle analysis method and apparatus |
| GB2463402A (en) * | 2007-06-20 | 2010-03-17 | Thermo Electron Scient Instr | Processing of spectrometer pile-up events |
| CN101806910A (en) * | 2010-05-11 | 2010-08-18 | 西北核技术研究所 | Method and device for absolutely measuring for radioactive gas nuclide activity |
Non-Patent Citations (3)
| Title |
|---|
| 《引进与咨询》 20060630 温莉琴 环境样品中放射性含量gamma能谱测量技术的探讨 83-84 1-15 , 第6期 * |
| 吴伟明，等: "低比度测量高纯锗能谱仪的一种效率刻度方法", 《广西大学学报（自然科学版）》, vol. 22, no. 2, 30 June 1997 (1997-06-30), pages 109 - 113 * |
| 温莉琴: "环境样品中放射性含量γ能谱测量技术的探讨", 《引进与咨询》, no. 6, 30 June 2006 (2006-06-30), pages 83 - 84 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104239709A (en) * | 2014-09-05 | 2014-12-24 | 西安奥华电子仪器有限责任公司 | Method for determining yield of stratum element logging instrument by virtue of spectrum unfolding |
| CN104239710A (en) * | 2014-09-05 | 2014-12-24 | 西安奥华电子仪器有限责任公司 | Method for confirming yield through spectrum unfolding analysis of stratum element logging instrument |
| CN111032997A (en) * | 2017-12-26 | 2020-04-17 | 中国石油天然气股份有限公司 | Gamma-ray energy spectrum unscrambling method and device for element capture energy spectrum logging |
| CN111032997B (en) * | 2017-12-26 | 2023-02-07 | 中国石油天然气股份有限公司 | Gamma-ray energy spectrum unscrambling method and device for element capture energy spectrum logging |
| CN111551978A (en) * | 2020-05-08 | 2020-08-18 | 中国辐射防护研究院 | Method for evaluating uncertainty of radioactive soil sample sampling process |
| CN111551978B (en) * | 2020-05-08 | 2022-09-27 | 中国辐射防护研究院 | Method for evaluating uncertainty of radioactive soil sample sampling process |
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