CN105004678A - Spectral measurement source tracing method of rock core spectral scanner - Google Patents
Spectral measurement source tracing method of rock core spectral scanner Download PDFInfo
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- CN105004678A CN105004678A CN201510402083.1A CN201510402083A CN105004678A CN 105004678 A CN105004678 A CN 105004678A CN 201510402083 A CN201510402083 A CN 201510402083A CN 105004678 A CN105004678 A CN 105004678A
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Abstract
The invention relates to a spectral measurement source tracing method of a rock core spectral scanner. The method comprises measuring a spectral value of a standard reference plate by a rock core spectral scanner to obtain a dark current value of the rock core spectral scanner, measuring a rock core sample spectral value by the rock core spectral scanner, and carrying out correction on spectrum reflectivity of the rock core sample by the standard reference plate. Through a source tracing method, the spectral value of the reference plate of the apparatus is used as an intermediate transition spectrum so that data measured by the spectrograph utilizes the same standard reference plate as a reference and thus drift errors caused by environment factors in data measurement are eliminated.
Description
Technical field
The invention belongs to geology detecting technical field, relate to a kind of rock core spectrum scanner spectral measurement source tracing method.
Background technology
According to the applicant understood, rock core is non-renewable resources valuable in petroleum geology exploration development and research, and be also one of geological material of the most directly perceived, most critical, Petroleum Geological Analysis data and geophysical survey parameter are mostly from rock core.The observation of rock core is described in and determines, in lithology, deduction sedimentary environment and source-reservoir-seal assemblage synthetic study, there is irreplaceable effect.But after rock core goes out cylinder, its original looks and geological research mark are easily destroyed, and bring great impact to follow-up research work, thus the range of application of limitation rock core, reduce the lasting use value of rock core.Therefore, obtain Core information timely and effectively, contribute to improving rock core management level, expand rock core application, increase rock core using value.Rock core spectrum scanner (abbreviation spectrometer) is a kind of instrument measuring rock core conventional at present, based on Analysis of Reflective Spectrum technology, utilize spectrometer measurement sample in the reflection POP of a wavelength range, and come by different mineral according to its spectroscopic diagnostics feature.When utilizing rock core spectrum scanner to measure rock core spectrum, need measure spectrum reflectivity, spectral reflectivity is the ratio of core sample spectrum and reference plate spectrum, and therefore the stability of reference spectrum directly affects stability and the quality of measurement data.Usually when rock core spectral scan, in order to eliminate the impact of environmental change on spectral reflectivity, often coiling rock core all needs to scan reference spectrum.But, because reference plate is chronically exposed to external environment condition, along with passage of time, reference plate surface by contamination by dust or can produce oxidation reaction, and therefore slow change can occur reference plate spectrum, and this change can affect the measurement result of spectral reflectivity, especially in enormous quantities, long spectral reflectivity measuring process, measurement result can change along with passage of time, and data are drifted about, and comparability is significantly reduced.Therefore, in order to solve the stability problem of measurement data, in the urgent need to a kind of make all data of measurement all with same standard reference plate for benchmark, can eliminate and measure the method for drift error.
Summary of the invention
The object of the invention is to: the deficiency existed for above-mentioned prior art, propose a kind of rock core spectrum scanner spectral measurement source tracing method that easily and accurately can reduce spectral reflectivity.
In order to reach above object, rock core spectrum scanner spectral measurement source tracing method of the present invention, the device of the method comprises rock core pallet and is arranged on the rock core dish on rock core pallet, and described rock core dish is for placing core sample to be measured; The side of described rock core dish is provided with reference plate mounting blocks, described reference plate mounting blocks is shaped with the first reference plate mounting hole for placing standard reference plate and the second reference plate mounting hole for placing common reference plate; The top of described rock core dish is provided with the rock core spectrum scanner for measuring each dish sample, common reference plate and standard reference plate spectrum, and described rock core spectrum scanner is connected with computing machine; Described computing machine comprises information storage module and correction module, described information storage module, be connected with the signal output part of described rock core spectrum scanner, for receiving and exporting to correction module spectral information and the dark current value that the acquisition of core sample, common reference plate and standard reference plate measured by rock core spectrum scanner; Described correction module, be connected with described computer screen, for calculating the reflectivity of common reference plate spectrum and standard reference plate spectrum according to core sample spectral value, common reference plate spectral value and standard reference plate spectral value and dark current value, with common reference plate for the sample spectra reflectivity of contrast and the sample spectra reflectivity after correcting, and result of calculation is delivered to display screen display; Spectral measurement source tracing method during measurement comprises the following steps:
1st step, standard reference plate to be placed in the first reference plate mounting hole, and the spectral value defining standard reference plate is I
b, adopt the spectral value I of rock core spectrum scanner measurement standard reference plate
bafter, by the spectral value I of standard reference plate
bbe delivered to information storage module;
The dark current value I of the 2nd step, acquisition rock core spectrum scanner
1, and by dark current value I
1be delivered to information storage module;
3rd step, core sample to be placed on rock core dish, and the spectral value defining core sample is I, after adopting rock core spectrum scanner to measure the spectral value I of core sample, the spectral value I of core sample is delivered to information storage module;
4th step, the spectral reflectivity of employing standard reference plate to core sample correct, and the core sample spectral reflectivity after definition corrects is F
d, correction module receive spectral information that information storage module sends and according to (1) formula calculate correct after the spectral reflectivity F of sample
d,
F
D＝F
0×F ⑴
Wherein, F
0for the reflectivity of common reference plate spectrum and standard reference plate spectrum, order
and I
ofor the spectral value of common reference plate, F is the sample spectra reflectivity measured for contrast with common reference plate, order
At present, often with the common reference plate exposed for a long time for contrast, measure the spectral reflectivity F of sample,
wherein I
1for the dark current value of spectrometer, I is the spectral value of core sample, I
0for the spectral value of common reference plate.And spectral measurement of the present invention seals the standard reference plate of preservation for contrast, during measurement, need the spectral value I of first measurement standard reference plate
b, then measure dark current value I
1, common reference plate spectral value I
0and the spectral value I of sample, finally obtain the spectral reflectivity F of common reference plate according to measurement data, order
final to seal guarantor
The standard reference plate deposited is contrast, obtains the spectral reflectivity F of sample
d, order
Learnt by above-mentioned formula, F value and F
0in the computing formula obtained after value is multiplied, F
donly with the spectral correlation of standard reference plate, the spectrum of common reference plate is excessive data, thus the spectrum change of common reference plate is eliminated.
Dark current also claims the spectrum that spectrometer is measured under non-illuminated conditions, and reasons for its use noise when namely not having a signal, the spectrum that (namely under non-illuminated conditions) opto-electronic conversion collects under absolute dark background is exactly dark current.Because the dark current value of general instrument remains unchanged, therefore dark current value I
1for constant.Simultaneously standard reference plate is placed on after a measurement in dry seal box and preserves, and can prevent that hand from touching, contamination by dust etc., has completely cut off the impact of environmental factor on standard reference plate, therefore the spectral value I of standard reference plate
balso can be constant, and sample reflection rate F
0only relevant with the spectral value I of sample, in summary, the sample spectra reflectivity F after correction
donly relevant to sample spectra value I, measurement result accurately and reliably.
Refinement of the present invention comprises:
In technique scheme, between described 2nd step and the 3rd step, also there are following steps 21: be placed on by common reference plate in the second reference plate mounting hole, and the spectral value defining common reference plate is I
0, adopt rock core spectrum scanner to measure the spectral value I of common reference plate
0after, by the spectral value I of common reference plate
0be delivered to information storage module.
In technique scheme, described common reference plate is the reference plate be exposed in air operational environment, specifically often do the reference plate that a dish rock core all will gather a spectrum, described standard reference plate is the reference plate that sealing is kept at dry place, can avoid in use procedure polluting, just can pack up after only measuring 1 spectrum after instrument start is stable.
In technique scheme, in described step 1 and 2, rock core spectrum scanner, after every day, start was stable, measures the spectral value I of a standard reference plate
bwith dark current I
1, and measurement data is uploaded to the information storage module of computing machine.
In technique scheme, when each dish core sample scans, first rock core spectrum scanner all needs the spectral value I of measurement 1 common reference plate
0, and by the spectral value I of common reference plate
0be sent to the information storage module of computing machine, the correction module of computing machine is received information and is calculated the reflectivity F of common reference plate spectrum and standard reference plate spectrum after spectral information that storage module sends
0, order
secondly, rock core spectrum scanner need measure the spectral value I of each dish core sample, and the spectral value I of core sample is sent to the information storage module of computing machine, the correction module of computing machine is received information after spectral information that storage module sends and is calculated the sample spectra reflectivity F measured for contrast with common reference plate, order
finally, the correction module of computing machine calculate each dish sample correct after spectral reflectivity F
d, make F
d=F
0× F.
In technique scheme, after completing the spectral measurement of standard reference plate, standard reference plate is placed on sealing in reference plate box and preserves, and reference plate box is put in aeration-drying place, avoid standard reference plate to be polluted.
In technique scheme, in described 2nd step, light hurdle is adopted to hide the light entrance of rock core spectrum scanner, due to the inside not having light to arrive rock core spectrum scanner, its inside is made to be in without in photoenvironment, then operate rock core spectrum scanner and carry out spectral scan, and the spectral value of rock core spectrum scanner under gathering non-illuminated conditions, the dark current value I of rock core spectrum scanner can be obtained
1.
Advantage of the present invention adopts source tracing method, using the reference plate spectral value of instrument as middle transition spectrum, make the data measured by spectrometer all with same standard reference plate for benchmark, because of drift error that environmental factor causes when eliminating DATA REASONING.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is structural representation of the present invention.
In figure: 1. pop one's head in, 2. rock core spectrum scanner, 3. standard reference plate, 4. common reference plate, 5. rock core pallet, 6. rock core dish.
Embodiment
Embodiment one
The rock core spectrum scanner spectral measurement source tracing method of the present embodiment, the device of the method comprises rock core pallet 5 and the rock core dish 6 be arranged on rock core pallet 5, rock core dish 6 is for placing core sample to be measured, and be provided with reference plate mounting blocks in the side of rock core dish 6, reference plate mounting blocks is shaped with the first reference plate mounting hole for placing standard reference plate 3 and the second reference plate mounting hole for placing common reference plate 4, the top of rock core dish 6 is provided with for measuring each dish core sample in addition, the rock core spectrum scanner 2 of common reference plate 4 and standard reference plate spectrum 3, rock core spectrum scanner 2 is provided with aims at rock core dish 6, the probe 1 of standard reference plate 3 and common reference plate 4, rock core spectrum scanner 2 is connected with computing machine.Computing machine comprises information storage module and correction module, information storage module is connected with the signal output part of rock core spectrum scanner, and information storage module is for receiving and exporting to correction module spectral information and the dark current value that the acquisition of core sample, common reference plate and standard reference plate measured by rock core spectrum scanner; Correction module is connected with computer screen, and correction module is used for according to core sample spectral value I, common reference plate spectral value I
0with standard reference plate spectral value I
band dark current value I
1calculate the reflectivity F of common reference plate spectrum and standard reference plate spectrum
0, with common reference plate for the sample spectra reflectivity F of contrast and the sample spectra reflectivity F after correcting
d, and result of calculation is delivered to display screen display.
The rock core spectrum scanner spectral measurement source tracing method of the present embodiment, comprises the following steps:
After 1st step, rock core spectrum scanner start every day are stablized; get intact standard reference plate 3 and be put in the first reference plate mounting hole, then move rock core spectrum scanner 2, after making its 1 alignment criteria reference plate 3 of popping one's head in; the spectral value of measurement standard reference plate 3, and be designated as I
b, by spectral value I
bthe information storage module being uploaded to computing machine is preserved, and has measured rear standard reference plate 3 and has been placed on sealing collection in reference plate box, reference plate box has been placed in aeration-drying place, avoids environment pollution standard reference plate 3.
The dark current value I of the 2nd step, acquisition rock core spectrum scanner
1.After rock core spectrum scanner start every day is stable, measure the dark current value I of an instrument
1, and by dark current value I
1the information storage module being uploaded to computing machine is preserved.When measuring dark current value, first light hurdle is adopted to hide the light entrance of rock core spectrum scanner, due to the inside not having light to arrive rock core spectrum scanner, its inside is made to be in without in photoenvironment, then start rock core spectrum scanner and carry out spectral scan, gather the spectral value of this rock core spectrum scanner under non-illuminated conditions, this spectral value is the dark current value of rock core spectrum scanner simultaneously.
21st step, get 1 year before start to be exposed to reference plate in air ambient as common reference plate 4 when applying and preserve, common reference plate 4 is put in the second reference plate mounting hole, after mobile rock core spectrum scanner 2 makes its common reference plate 4 of 3 aligning of popping one's head in, measure the spectral value of common reference plate 4, and be designated as I
0, by spectral value I
0the information storage module being uploaded to computing machine is preserved.
3rd step, by core sample-have the quartzy bottle of pyrophyllite powder to be placed on rock core dish 6 in it, the pyrophyllite powder that mobile rock core spectrum scanner 2 makes it pop one's head in 3 aligning quartz bottles is last, measure its spectral value, and be designated as I, information storage module spectral value I being uploaded to computing machine is preserved.Correction module accepts I, I
b, I
0and I
1after spectral value, calculating with common reference plate 4 is the sample spectra reflectivity F contrasted,
result is auspicious in table 1; Calculate the spectral reflectivity F of common reference plate 4 and standard reference plate 3 simultaneously
0,
4th step, correction module adopt the spectral reflectivity of standard reference plate 3 pairs of pyrophyllite powder to correct.Specifically be correction module according to (1) formula (namely
) calculate the sample spectra reflectivity F after correcting
d, utilize standard reference plate spectral value I simultaneously
baccording to formula F
1=(I-I
1)/(I
b-I
1) directly calculate with standard reference plate 3 be contrast sample (pyrophillite powder) spectral reflectivity F
1, the results are shown in Table 1.
Finally, after correcting, sample reflection rate is associated with standard reference plate spectral value, using common reference plate spectral value as transition, eliminates common reference plate spectrum change that environmental pollution brings to the impact of reflectivity.
In addition, because rock core spectrum scanner 2 will carry out rock core scanning to polydisc sample every day, the therefore spectral value I of standard reference plate 3
bwith the dark current value I of rock core spectrum scanner
1be measure once every day, and the spectral value of common reference plate 4 needs to measure repeatedly according to the number of times of polydisc Sample Scan, namely each dish sample need measure once the spectral value of common reference plate 3.The spectral value I of 1 common reference plate need be measured when a dish sample carries out rock core scanning
0, and according to the common reference plate spectral value I that this is measured
0calculate the reflectivity of common reference plate spectrum and standard reference plate spectrum
then the spectral value I of this dish sample measured by rock core spectrum scanner, calculates with common reference plate 3 spectral reflectivity of this dish sample being contrast measurement
finally calculate the spectral reflectivity F after the correction of this dish sample
d=F
0× F.
Embodiment two
The difference of the present embodiment and embodiment one is: core sample to be scanned is Zijinshan rock core, and common reference plate exposes more than 3 years in the environment, is subject to certain pollution, the data recorded.
Embodiment three
The difference of the present embodiment and embodiment one is: core sample to be scanned is Wulonggou gold mine rock core, and common reference plate is exposed to environment more than 1 year, the data recorded.
Embodiment four
The difference of the present embodiment and embodiment one is: core sample to be scanned is laboratory rock core, and common reference plate is exposed to Superclean Lab more than 2 years, less pollution.
The spectral reflectivity of table 1 core sample
| F and F DVariance | F 1And F DVariance | |
| Embodiment one | 0.0843 | 0.0010 |
| Embodiment two | 0.0656 | 0.0009 |
| Embodiment three | 0.0534 | 0.0004 |
| Embodiment four | 0.0421 | 0.0003 |
As seen from the above table, F
1with F
dvalue difference is less, and validity is significantly improved.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (9)
1. a rock core spectrum scanner spectral measurement source tracing method, is characterized in that, the device of the method comprises rock core pallet and is arranged on the rock core dish on rock core pallet, and described rock core dish is for placing core sample to be measured; The side of described rock core dish is provided with reference plate mounting blocks, described reference plate mounting blocks is shaped with the first reference plate mounting hole for placing standard reference plate and the second reference plate mounting hole for placing common reference plate; The top of described rock core dish is provided with the rock core spectrum scanner for measuring each dish core sample, common reference plate and standard reference plate spectrum, and described rock core spectrum scanner is connected with computing machine; Described computing machine comprises information storage module and correction module, described information storage module, be connected with the signal output part of described rock core spectrum scanner, for receiving and exporting to correction module spectral information and the dark current value that the acquisition of core sample, common reference plate and standard reference plate measured by rock core spectrum scanner; Described correction module, be connected with described computer screen, for calculating the reflectivity of common reference plate spectrum and standard reference plate spectrum according to core sample spectral value, common reference plate spectral value and standard reference plate spectral value and dark current value, with common reference plate for the sample spectra reflectivity of contrast and the sample spectra reflectivity after correcting, and result of calculation is delivered to display screen display; Spectral measurement source tracing method during measurement comprises the following steps:
1st step, standard reference plate to be placed in the first reference plate mounting hole, and the spectral value defining standard reference plate is I
b, adopt the spectral value I of rock core spectrum scanner measurement standard reference plate
bafter, by the spectral value I of standard reference plate
bbe delivered to information storage module;
The dark current value I of the 2nd step, acquisition rock core spectrum scanner
1, and be delivered to information storage module;
3rd step, core sample to be placed on rock core dish, and the spectral value defining core sample is I, after adopting rock core spectrum scanner to measure the spectral value I of core sample, the spectral value I of core sample is delivered to information storage module;
4th step, the spectral reflectivity of employing standard reference plate to core sample correct, and the core sample spectral reflectivity after definition corrects is F
dafter, correction module according to (1) formula calculate correct after the spectral reflectivity F of sample
d,
F
D＝F
0×F ⑴
Wherein, F
0for the reflectivity of common reference plate spectrum and standard reference plate spectrum, order
i
0for the spectral value of common reference plate, F is the sample spectra reflectivity measured for contrast with common reference plate, order
2. rock core spectrum scanner spectral measurement source tracing method according to claim 1, it is characterized in that: between described 2nd step and the 3rd step, also there are following steps 21: common reference plate is placed in the second reference plate mounting hole, and the spectral value defining common reference plate is I
0, adopt rock core spectrum scanner to measure the spectral value I of common reference plate
0after, by the spectral value I of common reference plate
0be delivered to information storage module.
3. rock core spectrum scanner spectral measurement source tracing method according to claim 2, is characterized in that: described common reference plate is the reference plate be exposed in air operational environment, and described standard reference plate is the reference plate that sealing is kept at dry place.
4. rock core spectrum scanner spectral measurement source tracing method according to claim 1, is characterized in that: described rock core spectrum scanner, after every day, start was stable, measures the spectral value I of a standard reference plate
bwith dark current I
1, and measurement data is uploaded to the information storage module of computing machine.
5. the rock core spectrum scanner spectral measurement source tracing method according to claim 1-4, is characterized in that: when each dish sample carries out rock core scanning, rock core spectrum scanner need measure the spectral value I of 1 common reference plate
0, and by the spectral value I of common reference plate
0be sent to the information storage module of computing machine, the correction module of computing machine is received information and is calculated the reflectivity F of common reference plate spectrum and standard reference plate spectrum after spectral information that storage module sends
0, order
6. rock core spectrum scanner spectral measurement source tracing method according to claim 5, it is characterized in that: when each dish sample carries out rock core scanning, rock core spectrum scanner need measure the spectral value I of each dish core sample, and the spectral value I of core sample is sent to the information storage module of computing machine, the correction module of computing machine is received information after spectral information that storage module sends and is calculated the sample spectra reflectivity F measured for contrast with common reference plate, order
7. rock core spectrum scanner spectral measurement source tracing method according to claim 6, is characterized in that: the correction module of computing machine calculate each dish sample correct after spectral reflectivity F
d, make F
d=F
0× F.
8. rock core spectrum scanner spectral measurement source tracing method according to claim 4, it is characterized in that: after completing the spectral measurement of standard reference plate, standard reference plate is placed on sealing in reference plate box to preserve, and reference plate box is put in aeration-drying place, avoid standard reference plate to be polluted.
9. rock core spectrum scanner spectral measurement source tracing method according to claim 1, it is characterized in that: in described 2nd step, after adopting light hurdle to block the fiber entrance of rock core spectrum scanner, operation rock core spectrum scanner carries out spectral measurement, gather the spectral value of rock core spectrum scanner, the dark current value of rock core spectrum scanner can be obtained.
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|---|---|---|---|
| CN201510402083.1A CN105004678B (en) | 2015-07-09 | 2015-07-09 | A kind of rock core spectrum scanner spectral measurement source tracing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116678849A (en) * | 2023-08-04 | 2023-09-01 | 自然资源实物地质资料中心 | Quality control method and device for core spectrum scanner |
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2015
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| CN201335816Y (en) * | 2009-01-14 | 2009-10-28 | 布莱格科技（北京）有限公司 | X-ray energy spectrum core scanner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116678849A (en) * | 2023-08-04 | 2023-09-01 | 自然资源实物地质资料中心 | Quality control method and device for core spectrum scanner |
| CN116678849B (en) * | 2023-08-04 | 2023-10-27 | 自然资源实物地质资料中心 | Quality control method and device for core spectrum scanner |
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