CN104914075A - CCD sensor-based element detection system and detection method - Google Patents
CCD sensor-based element detection system and detection method Download PDFInfo
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- CN104914075A CN104914075A CN201510264164.XA CN201510264164A CN104914075A CN 104914075 A CN104914075 A CN 104914075A CN 201510264164 A CN201510264164 A CN 201510264164A CN 104914075 A CN104914075 A CN 104914075A
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Abstract
The invention relates to a CCD sensor-based element detection system. The system comprises an excitation device, a light condensation device, a dispersion device, an acquisition device, an imaging device and a mark identification device. The excitation device is used for exciting luminescence of a sample to be detected and comprises a power supply and a graphite electrode. The light condensation device comprises multiple condensing lenses for condensing incident lights excited by the excitation device. The dispersion device is used for dispersion of the incident lights condensed by the condensing lenses to produce multiple beams of monochromatic lights. The acquisition device comprises multiple CCD sensors for acquiring spectral information of the multiple beams of monochromatic lights dispersed by the dispersion device. The imaging device is used for converting an electrical signal transmitted by the acquisition device into an electron microscroph and comprises a processing device with function, and function input is a digital signal and function output is an electron microscroph. The mark identification device is used for showing the electron microscroph. The invention also provides a CCD sensor-based element detection method. The system and method have characteristics of measurement accuracy and operation convenience.
Description
Technical field
The present invention relates to a kind of Element detection system and method, particularly relate to a kind of Element detection system based on ccd sensor and detection method thereof.
Background technology
Emission spectrometry utilizes alternating current electric arc to produce high temperature, powder solid sample is excited to send characteristic spectrum, spectrum is by after the optically focused of the first lens and the second lens, elimination parasitic light, be irradiated on plane mirror after controlling light-inletting quantity by slit, reflex on concave mirror afterwards, then the spectral bands that sample produces is dispersed into the individual features spectral line of different element by spectro-grating.
Classic method is generally recorded by the characteristic spectral line of photosensitive phase-plate by element, obtain all characteristic spectral lines in a wavelength range, by with the characteristic spectral line of ferro element for scale is made into a cream-coloured loose or two cream-coloured loose amplifications twentyfold iron spectrum spectrogram, so that by the characteristic spectral line wavelength values of each element mark collection of illustrative plates, thus can facilitate, the quick characteristic spectral line finding each element from photosensitive phase-plate, by direct vision spectrogram, thus can fast qualitative analysis utilizing be realized, and can realize sxemiquantitative by the power and side spectral line of observing spectral line to its disturbed condition, quantitative test (being called for short phase-plate method).Silver-colored boron tin is analyzed in original sample, usual use bipolar electrode, a sample dress two carbon-points repeat to take the photograph spectrum twice, the advantage of repeated exposure is the increase in the light sensitivity of phase-plate, to improve the sensitivity analyzed, but shortcoming is the increase in the impact of background, and the downward bent part increasing the weight of have impact on working curve divides, and speed is slow, and a sample is taken the photograph spectrum and wanted more than one minute.
Phase-plate method surveying work curve, due to the impact of phase-plate emulsion S shape characteristic emulsion curve, working curve bends often.The characteristic emulsion curve often criticizing phase-plate of plant produced is different in theory, even if after correcting with characteristic emulsion curve, below working curve, great majority are still bending.Due to geological sample more complicated, the impact of matrix is comparatively large, and usually except making working curve, every block phase-plate needs the monitoring standard specimen of about 10 different contents, according to standard value local or the overall correction working curve of monitoring standard specimen, to draw the monitoring standard specimen value meeting definite value and require.
This kind of analyzed personnel of method apply decades, many conveniences are brought to analyst, but application iron spectrum spectrogram carries out spectral line and searches, more loaded down with trivial details in operation, particularly for the analyst being engaged in emission spectrographic analysis and lacking experience, usually need tens spectrograms to correspond to spectral line respectively to search, need the time of cost longer.Nowadays be the development trend of the method with the direct emission spectrometer that photoelectric commutator accepts spectral signal, that uses that electronics collection of illustrative plates can be in good time searches required element spectral line, simple and efficient.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of measurement precisely and the Element detection system based on ccd sensor of handled easily and detection method thereof.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of Element detection system based on ccd sensor, comprises excitation apparatus, beam condensing unit, dispersion means, harvester, imaging device and knowledge map device;
Described excitation apparatus is used for exciting testing sample luminous;
Described beam condensing unit comprises multiple condenser for converging the incident light that described excitation apparatus inspires;
It is multi beam monochromatic light that described dispersion means is used for the incident light dispersion after being converged by described beam condensing unit, comprises multiple concave mirror and the holographic high dencity grating for dispersion;
Described harvester comprises multiple ccd sensor for gathering the monochromatic spectral information of multi beam after described dispersion means dispersion, described monochromatic spectral information is also converted to electric signal by described multiple ccd sensor, and described electric signal is sent to described imaging device;
Described imaging device is used for the electric signal that described harvester sends to be converted to electronics collection of illustrative plates, and comprise the treating apparatus being built-in with function, the input of described function is digital signal, and output is electronic chart spectrogram spectrum;
Described knowledge map device is used for presenting described electronics collection of illustrative plates.
Described excitation apparatus comprises power supply and graphite electrode.
Described beam condensing unit comprises the shade for regulating incident light luminous flux.
Described ccd sensor comprises multiple for gathering light signal and described light signal being converted to the photodiode of electric signal, and described electric signal is sent to imaging device by described ccd sensor.
Described imaging device also comprises amplifying circuit, and the electric signal that harvester collects by described amplifying circuit amplifies.
Described imaging device also comprises the A/D modular converter for the electric signal after described amplifying circuit amplification being converted to digital signal.
The beneficial effect of the technical program is: employ holographic high dencity grating, more traditional common grating, holographic high dencity grating groove is closeer, and slit on the grating of formed objects is more, because the feature of the striped of grating generation is: bright fringe is very bright very narrow, dark space between adjacent bright line is very wide, and diffraction pattern is very clear.Thus optical grating diffraction is utilized accurately can to measure wavelength.Therefore the more bright fringes of slit number are brighter, thinner, grating resolution is higher.
In addition, replace traditional photographic plate with CCD photoelectric sensor, the spectrum after dispersion can be converted to digital signal, these digital signals are input to display can intuitive and accurately be analyzed, decrease the process of artificial identification of spectrogram simultaneously, substantially increase work efficiency.
As the present invention on the other hand, a kind of method for detecting element based on ccd sensor, comprises the steps:
S100, excite testing sample by high voltage, make it luminous;
S200, the incident light that testing sample sends to be converged, and regulate the luminous flux of incident light;
S300, by holographic high dencity grating, dispersion is carried out to the incident light converged, make its dispersion be multi beam monochromatic light;
S400, gather the spectral information after described dispersion by ccd sensor, described spectral information is converted to electric signal;
S500, the electric signal that described ccd sensor is changed is converted to electronics collection of illustrative plates;
S600, present described electronics collection of illustrative plates, and draw element kind and various constituent content in testing sample according to described electronic chart analysis of spectrum.
In described step S300, before carrying out dispersion to incident light, one or more concave mirror is used to be reflexed to holographic high dencity grating; After described incident light is monochromatic light by dispersion, one or more concave mirror is used to be reflexed to ccd sensor.
In described step S500, the mode converting electrical signals to electronics collection of illustrative plates is, first carries out analog to digital conversion, converts described electric signal to digital signal, described digital signal input is built in the function of imaging device, thus generates the electronics collection of illustrative plates corresponding with described electric signal.
The horizontal ordinate of described electronics collection of illustrative plates is wavelength, and ordinate is light intensity.
In described step S600, the analysis of testing sample is comprised by knowing the modes such as map device amplifies spectrogram, crest is located automatically.
The beneficial effect of the technical program is: before carrying out dispersion to incident light, use one or more concave mirror to be reflexed to holographic high dencity grating, can increase incident light like this by the light path of dispersion money, thus makes incident light chromatic dispersion effects better; After described incident light is monochromatic light by dispersion, use one or more concave mirror to be reflexed to ccd sensor, incident light can be increased like this by the light path after dispersion, thus make the light after dispersion disperse get Geng Kai, time ccd sensor read time more clear, be also convenient to staff's later stage knowledge figure.
In addition, replace traditional photographic plate with CCD photoelectric sensor, the spectrum after dispersion can be converted to digital signal, these digital signals are input to display can intuitive and accurately be analyzed, decrease the process of artificial identification of spectrogram simultaneously, substantially increase work efficiency.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of detection system of the present invention;
Fig. 2 is the structural representation of the first embodiment of detection system of the present invention;
Fig. 3 is the flow chart of steps of detection method.
In accompanying drawing, the list of parts representated by each label is as follows:
1, excitation apparatus, 11, power supply, 12, graphite electrode, 2, beam condensing unit, 21, condenser, 22, shade, 3, dispersion means, 31, concave mirror, 32, holographic high dencity grating, 4, harvester, 41, ccd sensor, 411, photodiode, 5, imaging device, 51, amplifying circuit, 6, know map device.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, a kind of Element detection system based on ccd sensor, comprises excitation apparatus 1, beam condensing unit 2, dispersion means 3, harvester 4, imaging device 5 and knows map device 6;
Described excitation apparatus 1 is for exciting testing sample luminous;
Described beam condensing unit 2 comprises multiple condenser 21 for converging the incident light that described excitation apparatus 1 inspires;
Described dispersion means 3 is multi beam monochromatic light for the incident light dispersion after being converged by described beam condensing unit 2, comprises multiple concave mirror 31 and the holographic high dencity grating 32 for dispersion;
Described harvester 4 comprises multiple ccd sensor 41 for gathering the monochromatic spectral information of multi beam after the dispersion of described dispersion means 3, described monochromatic spectral information is also converted to electric signal by described multiple ccd sensor 41, and described electric signal is sent to described imaging device 5;
Described imaging device 5 is converted to electronics collection of illustrative plates for the electric signal sent by described harvester 4, comprises the treating apparatus 51 being built-in with function, and the input of described function is digital signal, and output is electronic chart spectrogram spectrum;
Described knowledge map device 6 is for presenting described electronics collection of illustrative plates.
Described excitation apparatus 1 comprises power supply 11 and graphite electrode 12.
Described beam condensing unit 2 comprises the shade 22 for regulating incident light luminous flux.
Described ccd sensor 41 comprises multiple for gathering light signal and described light signal being converted to the photodiode 411 of electric signal, and described electric signal is sent to imaging device 5 by described ccd sensor 41.
Described imaging device 5 also comprises amplifying circuit 52, and the electric signal that harvester 4 collects by described amplifying circuit 52 amplifies.
Described imaging device 5 also comprises the A/D modular converter 53 being converted to digital signal for the electric signal after being amplified by described amplifying circuit 52.
Be illustrated in figure 2 the present invention on the other hand, a kind of method for detecting element based on ccd sensor, comprises the steps:
S100, pass through Gao Guang;
S200, the incident light sent testing sample carry out remittance voltage and excite testing sample, make it gather, and regulate the luminous flux of incident light;
S300, by holographic high dencity grating, dispersion is carried out to the incident light converged, make its dispersion be multi beam monochromatic light;
S400, gather the spectral information after described dispersion by ccd sensor, described spectral information is converted to electric signal;
S500, the electric signal that described ccd sensor is changed is converted to electronics collection of illustrative plates;
S600, present described electronics collection of illustrative plates, and draw element kind and various constituent content in testing sample according to described electronic chart analysis of spectrum.
In described step S300, before carrying out dispersion to incident light, one or more concave mirror is used to be reflexed to holographic high dencity grating; After described incident light is monochromatic light by dispersion, one or more concave mirror is used to be reflexed to ccd sensor.
In described step S500, the mode converting electrical signals to electronics collection of illustrative plates is, first carries out analog to digital conversion, converts described electric signal to digital signal, described digital signal input is built in the function of imaging device, thus generates the electronics collection of illustrative plates corresponding with described electric signal.
The horizontal ordinate of described electronics collection of illustrative plates is wavelength, and ordinate is light intensity.
In described step S600, the analysis of testing sample is comprised by knowing the modes such as map device amplifies spectrogram, crest is located automatically.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the Element detection system based on ccd sensor, it is characterized in that, comprise excitation apparatus (1), beam condensing unit (2), dispersion means (3), harvester (4), imaging device (5) and know map device (6);
Described excitation apparatus (1) is for exciting testing sample luminous;
Described beam condensing unit (2) comprises multiple condenser (21) for converging the incident light that described excitation apparatus (1) inspires;
Described dispersion means (3), for being multi beam monochromatic light by the incident light dispersion after described beam condensing unit (2) convergence, comprises multiple concave mirror (31) and the holographic high dencity grating (32) for dispersion;
Described harvester (4) comprises multiple ccd sensor (41) for gathering the monochromatic spectral information of multi beam after described dispersion means (3) dispersion, described monochromatic spectral information is also converted to electric signal by described multiple ccd sensor (41), and described electric signal is sent to described imaging device (5);
Described imaging device (5) is converted to electronics collection of illustrative plates for the electric signal sent by described harvester (4), comprise the treating apparatus (51) being built-in with function, the input of described function is digital signal, and output is electronic chart spectrogram spectrum;
Described knowledge map device (6) is for presenting described electronics collection of illustrative plates.
2. a kind of Element detection system based on ccd sensor according to claim 1, it is characterized in that, described excitation apparatus (1) comprises power supply (11) and graphite electrode (12).
3. a kind of Element detection system based on ccd sensor according to claim 1, it is characterized in that, described beam condensing unit (2) comprises the shade (22) for regulating incident light luminous flux.
4. a kind of Element detection system based on ccd sensor according to claim 1, it is characterized in that, described ccd sensor (41) comprises multiple for gathering light signal and described light signal being converted to the photodiode (411) of electric signal, and described electric signal is sent to imaging device (5) by described ccd sensor (41).
5. a kind of Element detection system based on ccd sensor according to claim 1, it is characterized in that, described imaging device (5) also comprises amplifying circuit (52), and the electric signal that harvester (4) collects by described amplifying circuit (52) amplifies.
6. a kind of Element detection system based on ccd sensor according to claim 5, it is characterized in that, described imaging device (5) also comprises the A/D modular converter (53) for the electric signal after described amplifying circuit (52) amplification being converted to digital signal.
7. based on a method for detecting element for ccd sensor, it is characterized in that, comprise the steps:
S100, excite testing sample by high voltage, make it luminous;
S200, the incident light that testing sample sends to be converged, and regulate the luminous flux of incident light;
S300, by holographic high dencity grating, dispersion is carried out to the incident light converged, make its dispersion be multi beam monochromatic light;
S400, gather the spectral information after described dispersion by ccd sensor, described spectral information is converted to electric signal;
S500, the electric signal that described ccd sensor is changed is converted to electronics collection of illustrative plates;
S600, present described electronics collection of illustrative plates, and draw element kind and various constituent content in testing sample according to described electronic chart analysis of spectrum.
8. a kind of method for detecting element based on ccd sensor according to claim 7, is characterized in that, in described step S300, before carrying out dispersion to incident light, use one or more concave mirror to be reflexed to holographic high dencity grating; After described incident light is monochromatic light by dispersion, one or more concave mirror is used to be reflexed to ccd sensor.
9. a kind of method for detecting element based on ccd sensor according to claim 7, it is characterized in that, in described step S500, the mode converting electrical signals to electronics collection of illustrative plates is, first analog to digital conversion is carried out, convert described electric signal to digital signal, described digital signal input is built in the function of imaging device, thus generates the electronics collection of illustrative plates corresponding with described electric signal.
10. a kind of method for detecting element based on ccd sensor according to any one of claim 7-9, is characterized in that, comprises by knowing the mode that map device amplifies spectrogram, crest is located automatically in described step S600 to the analysis of testing sample.
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| CN106770185A (en) * | 2016-12-28 | 2017-05-31 | 湖北省地质实验测试中心 | A kind of elemental detection system and detection method based on ccd sensor |
| CN110672565A (en) * | 2019-10-17 | 2020-01-10 | 郑州航空工业管理学院 | Performance testing device for low-dimensional photoelectric material |
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