CN101813646A - Method and device for correcting instrument drift during X-ray fluorescence quantitative detection - Google Patents
Method and device for correcting instrument drift during X-ray fluorescence quantitative detection Download PDFInfo
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- CN101813646A CN101813646A CN 201019114089 CN201019114089A CN101813646A CN 101813646 A CN101813646 A CN 101813646A CN 201019114089 CN201019114089 CN 201019114089 CN 201019114089 A CN201019114089 A CN 201019114089A CN 101813646 A CN101813646 A CN 101813646A
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Abstract
The invention discloses a method and a device for correcting instrument drift during X-ray fluorescence quantitative detection.A reference mechanism controlled by an instrument is arranged between an X-ray tube and a measurement sample box; a reference sample pressed according to the metal element to be detected is arranged on the mechanism; and measuring the reference sample by using an X fluorescence analyzer to obtain the pulse counting rate of the reference sample as an original target intensity value. When the X fluorescence analyzer is used for online operation measurement, the counting rate of the reference sample is measured before the ore pulp sample is measured each time, the ratio of the counting rate to the original target intensity of the reference sample is used as a standardization coefficient, and the pulse counting rate of the ore pulp sample measured each time is corrected by using the calculated standardization coefficient to obtain the standard pulse counting rate of online ore pulp measurement. The drift of the instrument on the performance index caused by long-term or short-term can be compensated in real time, and the stability and the measurement accuracy index of the instrument are improved.
Description
Technical field
The present invention relates to the real-Time Compensation technology of a kind of radionetric survey analytical equipment drift, the bearing calibration and the device of instrument drift when especially relating to a kind of XRF detection by quantitative.
Background technology
In the mineral process, usually with the xrf analysis instrument mine slurry grade is carried out online detection, instrument is in operation, As time goes on reach the continuous variation of surrounding environment factor, its running status is also little by little changing, and the long term drift of the short-term fluctuation of instrument or drift and instrument all can cause the measuring accuracy of fluorescent spectroscopy.The stability of short-term is caused by the fluctuation of environment temperature, atmospheric pressure, AC network, X-ray pipe power supply, detector and drift institute.The long term drift of instrument then causes owing to the instrument component aging, comprising X-ray pipe electric power output voltage wearing out along with resistance and other elements, the light pipe target surface spot may occur and metal sublimate accumulation arrives the window inside surface, cause the ray output intensity to descend, the diffraction crystal reflection efficiency reduces, and detective quantum efficiency descends or the like.
In the prior art,, generally be rule of thumb, after instrument moves a period of time, instrument returned zero correction the bearing calibration of xrf analysis instrument drift.
There is following shortcoming at least in above-mentioned prior art:
Be difficult to the drift on automatic, the real-time compensation apparatus measuring accuracy, the stability and the measuring accuracy of instrument are lower.
Summary of the invention
The purpose of this invention is to provide a kind of can be automatically, the drift on the real-Time Compensation Instrument measuring precision, the bearing calibration of instrument drift when improving the XRF detection by quantitative of the stability of instrument and measuring accuracy.
The objective of the invention is to be achieved through the following technical solutions:
The bearing calibration of instrument drift during XRF detection by quantitative of the present invention comprises step:
At first, prepare the reference sample, and repeatedly measure the pulsimeter digit rate of the metallic element to be measured in the described reference sample with the xrf analysis instrument according to metallic element to be measured and content thereof;
Then, get repeatedly the mean value of pulsimeter digit rate of the metallic element to be measured in the reference sample of measuring as the original object intensity level;
Afterwards, before described xrf analysis instrument is measured testing sample at every turn, at first measure once described reference sample, and pulsimeter digit rate and the described original object intensity level of the metallic element to be measured of this time measurement compared, with the result of comparison correction factor as this measurement;
At last, measure testing sample, and this result who measures testing sample is revised with described correction factor.
The device of the bearing calibration of instrument drift during the above-mentioned XRF detection by quantitative of realization of the present invention, comprise the X-ray pipe, the place ahead of described X-ray pipe is provided with sample box, be provided with the reference sample between described X-ray pipe and the sample box, described reference sample can shift out or move between described X-ray pipe and the sample box.
As seen from the above technical solution provided by the invention, the bearing calibration and the device of instrument drift during XRF detection by quantitative of the present invention are owing between X-ray pipe and measuring samples box, be provided with a reference mechanism that controlled by instrument; The reference sample that is pressed into by metallic element to be measured is installed in this mechanism; Use the xrf analysis instrument to measure the reference sample, the pulsimeter digit rate that obtains reference is as the original object intensity level.When xrf analysis instrument on-line operation is measured, all to measure the counting rate of a reference before each measurement ore pulp sample, and with the ratio of this counting rate and reference original object intensity as normalisation coefft, utilize the normalisation coefft that calculates that the pulsimeter digit rate of the ore pulp sample of each measurement is revised, obtain the full sized pules counting rate of online ore pulp.Can be automatically, the drift on the performance index brought because of long-term or short-term of real-Time Compensation instrument, improve the stability and the measuring accuracy index of instrument.
Description of drawings
The process flow diagram of Fig. 1 bearing calibration specific embodiment of instrument drift during for XRF detection by quantitative of the present invention;
The structural representation of the device specific embodiment of the bearing calibration of instrument drift when Fig. 2 realizes the XRF detection by quantitative for the present invention.
Embodiment
The bearing calibration of instrument drift during XRF detection by quantitative of the present invention, its preferable embodiment comprises step as shown in Figure 1:
At first, prepare the reference sample, and repeatedly measure the pulsimeter digit rate of the metallic element to be measured in the described reference sample with the xrf analysis instrument according to metallic element to be measured and content thereof;
Then, get repeatedly the mean value of pulsimeter digit rate of the metallic element to be measured in the reference sample of measuring as the original object intensity level;
Afterwards, before described xrf analysis instrument is measured testing sample at every turn, at first measure once described reference sample, and pulsimeter digit rate and the described original object intensity level of the metallic element to be measured of this time measurement compared, with the result of comparison correction factor as this measurement;
At last, measure testing sample, and this result who measures testing sample is revised with described correction factor.
The device of the bearing calibration of instrument drift during the above-mentioned XRF detection by quantitative of realization of the present invention, its preferable embodiment be as shown in Figure 2:
Comprise the X-ray pipe, the place ahead of described X-ray pipe is provided with sample box, is provided with the reference sample between described X-ray pipe and the sample box, and described reference sample can shift out or move between described X-ray pipe and the sample box.
Described reference sample can be fixed in the reference mechanism, and described reference mechanism can drive described reference sample and shift out or move between described X-ray pipe and the sample box.
The correct detection method and the device of instrument drift are under the cooperation of reference mechanism during XRF detection by quantitative of the present invention, by a kind of standardization measuring method, calculate the drift correction constant, the processing procedure of carrying out the correction of spectrometer pulse value.Be used to overcome instrument because of long-term or short term drift to the influence that the target strength value causes, improved the measuring accuracy of target strength, thereby improved the grade analysis precision of analyser.
Also the present invention is described in detail in conjunction with the accompanying drawings below by specific embodiment:
Again referring to Fig. 1, Fig. 2:
Between X-ray pipe and measuring samples box, a reference mechanism that is subjected to instrument control is set; By metallic element to be measured and content, prepare the reference sample with powder art sample, compression moulding is installed in the reference sample position among Fig. 1; When reference corrected was carried out in the needs measurement, reference mechanism entered between X-ray pipe and the sample box reference sample.
After finishing measurement, reference mechanism leaves between X-ray pipe and the sample box reference sample, make it can the measuring samples box the ore pulp sample.
Flow process according to Fig. 2, before the normal use of instrument input, the reference sample enters the measuring position, and the xrf analysis instrument is measured this reference sample of certain number of times, draw reference measure in the mean value of the pulsimeter digit rate of element separately, as reference original object intensity level;
After, during analyser instrument on-line operation, at first carrying out standardization measures, all to measure the counting rate of a reference before promptly each measurement ore pulp sample, and be exactly normalisation coefft with the result of the ratio of this counting rate and reference original object intensity level, as the compensation correction factor of instrument drift.
At last, the normalisation coefft that utilize to calculate is revised the pulsimeter digit rate of the ore pulp sample of this measurement, obtains the full sized pules counting rate of online ore pulp, with compensation apparatus because of for a long time or the drift on the performance index brought of short-term.
The present invention can be used for the metal element content detecting instrument equipment of online x-ray fluorescence analyzer, and the drift on the performance index brought because of long-term or short-term of compensation apparatus well improves the stability and the measuring accuracy index of instrument.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (3)
1. the bearing calibration of instrument drift during an XRF detection by quantitative is characterized in that, comprises step:
At first, prepare the reference sample, and repeatedly measure the pulsimeter digit rate of the metallic element to be measured in the described reference sample with the xrf analysis instrument according to metallic element to be measured and content thereof;
Then, get repeatedly the mean value of pulsimeter digit rate of the metallic element to be measured in the reference sample of measuring as the original object intensity level;
Afterwards, before described xrf analysis instrument is measured testing sample at every turn, at first measure once described reference sample, and pulsimeter digit rate and the described original object intensity level of the metallic element to be measured of this time measurement compared, with the result of comparison correction factor as this measurement;
At last, measure testing sample, and this result who measures testing sample is revised with described correction factor.
2. the device of the bearing calibration of an instrument drift when realizing the described XRF detection by quantitative of claim 1, comprise the X-ray pipe, the place ahead of described X-ray pipe is provided with sample box, it is characterized in that, be provided with the reference sample between described X-ray pipe and the sample box, described reference sample can shift out or move between described X-ray pipe and the sample box.
3. the device of the bearing calibration of instrument drift during realization XRF detection by quantitative according to claim 2, it is characterized in that, described reference sample is fixed in the reference mechanism, and described reference mechanism drives described reference sample and shifts out or move between described X-ray pipe and the sample box.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201019114089 CN101813646A (en) | 2010-02-26 | 2010-02-26 | Method and device for correcting instrument drift during X-ray fluorescence quantitative detection |
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| CN 201019114089 CN101813646A (en) | 2010-02-26 | 2010-02-26 | Method and device for correcting instrument drift during X-ray fluorescence quantitative detection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323872A (en) * | 2012-03-20 | 2013-09-25 | 西门子公司 | Method for energy calibrating quantum-counting x-ray detectors in a dual-source computed-tomography scanner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1048161A (en) * | 1996-07-31 | 1998-02-20 | Shimadzu Corp | X-ray analyzer |
| JP2000105208A (en) * | 1998-09-30 | 2000-04-11 | Rigaku Industrial Co | Fluorescent x-ray analyzer |
| CN201373858Y (en) * | 2009-03-04 | 2009-12-30 | 上海精谱仪器有限公司 | Energy chromatic dispersion X fluorescence analyser |
-
2010
- 2010-02-26 CN CN 201019114089 patent/CN101813646A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1048161A (en) * | 1996-07-31 | 1998-02-20 | Shimadzu Corp | X-ray analyzer |
| JP2000105208A (en) * | 1998-09-30 | 2000-04-11 | Rigaku Industrial Co | Fluorescent x-ray analyzer |
| CN201373858Y (en) * | 2009-03-04 | 2009-12-30 | 上海精谱仪器有限公司 | Energy chromatic dispersion X fluorescence analyser |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323872A (en) * | 2012-03-20 | 2013-09-25 | 西门子公司 | Method for energy calibrating quantum-counting x-ray detectors in a dual-source computed-tomography scanner |
| US9039284B2 (en) | 2012-03-20 | 2015-05-26 | Siemens Aktiengesellschaft | Method for energy calibrating quantum-counting x-ray detectors in a dual-source computed-tomography scanner |
| CN103323872B (en) * | 2012-03-20 | 2015-11-18 | 西门子公司 | X-ray detector for counting quantum carries out the method for energy calibration |
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