CN102175663B - Mineral age tester with background compensation function - Google Patents
Mineral age tester with background compensation function Download PDFInfo
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- CN102175663B CN102175663B CN 201110065899 CN201110065899A CN102175663B CN 102175663 B CN102175663 B CN 102175663B CN 201110065899 CN201110065899 CN 201110065899 CN 201110065899 A CN201110065899 A CN 201110065899A CN 102175663 B CN102175663 B CN 102175663B
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Abstract
The invention relates to a mineral age tester with a background compensation function, which is particularly applied to the age testing of geological mineral samples. The mineral age tester comprises a detector and a host machine which are connected with each other by a control line, wherein the detector comprises a test darkroom and a background darkroom which are called as a darkroom collectively and are integrally connected side by side and a test photomultiplier and a background compensation photomultiplier which are respectively arranged on the test darkroom and the background darkroom; the shapes and structures of the test darkroom and the background darkroom are identical; positions of added sample wafers relative to the test photomultiplier and the background photomultiplier are the same, and the types of the test photomultiplier and the background compensation photomultiplier are the same; the types and specifications of detecting optical filters arranged in front of the two photomultipliers are the same; the darkroom has a dual-layer shell structure, namely a shell is wrapped outside a darkroom base; and sealing structures are arranged at each interface of the detector. The mineral age tester has the advantages of small volume, light weight, high sealability and sensitivity, dynamic compensation and the like, and is convenient to operate.
Description
Technical field
The present invention relates to a kind of mineral dating instrument with background compensate function that specifically is applied to the dating of geology mineral sample.
Background technology
The solid mineral crystal growth is in physical environment, and the lattice imperfection that the birth defect that produces in growth course and acquired environment all can cause its crystals for its radiation forms free energy storage electronics.Be stored in these energy storage electronics in the crystal once the stimulation of external energy, will launch photon, adopt luminous energy to excite the method for mineral crystal just to be called light and release light.Light is released only a kind of phosphorescence, and under fixing light source and identical shooting conditions, the photon total amount of this phosphorescence is directly proportional with the total amount of energy storage electronics in the solid.Here it is, and light is released the theoretical foundation that the light technology is applied to geology mineral sample survey year.
Release the principle of light mineral dating according to light, the computing formula in mineral samplers age is:
t=N/B=De/Dy
Wherein: t is the age of sample; N is that the light that accumulates in the crystalline solid is released the light total amount; B is that the annual light that produces of various types of radiation is released the light summation; De is dose,equivalent, namely produces to be equivalent to the natural required laboratory dosage of optical signal level of releasing of sample, is also referred to as ancient dosage; Dy is the summation of various types of radiation annual radiation dose that produces in crystal.
Adopt light to release the light method and carry out the mineral dating, concrete test method is divided into a variety of, but no matter takes which kind of method, all needs the natural light signal of releasing of releasing light signal and additional various dose of mineral samplers is carried out photon detection.
Photomultiplier has high sensitivity and extremely low noise, and therefore existing mineral dating instrument adopts it as the detecting devices of Light releasing photon more, receives the Light releasing photon that inspires.But photomultiplier still has small anode dark current output in dark fully environment, Here it is, and light is released light-year for the background of measuring (background curve as shown in Figure 5).The actual light curve area of releasing should be the area under the curve that the light curve area deducts background of releasing that records.Usually before light is released optical tests, print is carried out a background test, obtain the background curve.But the method for this acquisition background curve only is applicable to that background changes very small situation in the experimentation.
But it is very small that in fact, the dark background of photomultiplier is difficult to keep the background variation in test process.Its background is by the following aspect of forming: 1. electronics heat emission.Temperature is very big for the dark background influence of photomultiplier; 2. glass is luminous.3. field emission is when photomultiplier operating voltage during near maximal work voltage, and powerful electric field makes electrode send field emitted electron, thereby causes dark pulse output.This shows, temperature in the experimental situation and electric field have very big influence for background, if temperature and electric field change in the test process, the background curve will acute variation so, be different from the former background curve that records strongly, and then bigger influence the accuracy that light is released light curve area and dating.Therefore need release light-year to light carries out record for the dark background fluctuations that occurs in the mensuration process, just may compensate it when final data is handled, and eliminates it for the final dating influence of degree of accuracy as a result.
Existing light is released light mineral dating instrument and is not only had dynamic background compensate function, and expensive, complicated operation, bulky, is unfavorable for carrying.
Summary of the invention
The present invention has designed a kind of mineral dating instrument with background compensate function, can be in mineral dating process simultaneously at the bottom of the minute book, thus eliminate background for the influence of dating, improve and release light-year for the accuracy of measuring; And adopt the Arm machine to carry out the control of whole mineral samplers dating process, it is little for volume to have satisfied geological instrument, lightweight requirement.It is little, in light weight that the present invention has a volume, good airproof performance, highly sensitive, dynamic compensation, advantage such as easy to operate.
Following technical scheme of the present invention:
A kind of mineral dating instrument with background compensate function is characterized in that: described mineral dating instrument comprises explorer and the main frame that connects by control line;
Described explorer comprises that the test darkroom and the background darkroom that link into an integrated entity side by side are referred to as the darkroom, and the testing photoelectronic multiplier tube and the background that are installed in respectively on test darkroom and the background darkroom compensate photomultiplier, described darkroom comprises the darkroom shell, darkroom loam cake, darkroom base; Testing photoelectronic multiplier tube and background compensation photomultiplier all is individually fixed on separately the darkroom and covers, testing photoelectronic multiplier tube and background compensation photomultiplier links together by overlapping on the good photomultiplier of electric conductivity and thermal conductivity, the front end of testing photoelectronic multiplier tube and background compensation photomultiplier passes the loam cake in darkroom separately respectively, fixedly has one to survey optical filter 1,2 respectively before testing photoelectronic multiplier tube and the background compensation photomultiplier; The darkroom base is bucket-shaped, central part at test darkroom and background darkroom base is separately installed with dismountable mineral print support, be placed with test mineral print and background mineral print on the mineral print support respectively, the center of each print aligns with the center of testing photoelectronic multiplier tube and background compensation photomultiplier respectively; Test darkroom base oblique domatic be set be connected with main frame be subjected to host computer control about two groups of excitation sources, each organizes the lighting angle unanimity of excitation source, its spot center is positioned at test mineral print center, and exciter filter is fixedly arranged before the excitation source;
Described test darkroom and background darkroom shape and structure are identical, it is identical with background photomultiplier position with respect to the testing photoelectronic multiplier tube that institute adds print, and testing photoelectronic multiplier tube and background compensation photomultiplier model is identical, and the set detection optical filter model specification in two photomultiplier fronts is identical;
Described main frame comprises the ARM machine that is connected with signal wire by control line, liquid crystal display, and the high voltage control module, high-pressure modular, the shaping pulse module, counting module, light source control module comprises blue light control module and infrared control module; ARM machine output high voltage control signal is connected to the high voltage control module, the high voltage control module is connected to high-pressure modular by control line, the output of high-pressure modular is connected to testing photoelectronic multiplier tube and the background compensation photomultiplier in the explorer, described two photomultipliers detect behind the photon output pulse signal shaping pulse module in the main frame, the shaping pulse module output signal is to counting module, and the ARM machine is connected with counting module by control line; ARM machine output light source control signal is to light source control module, and light source control module is connected to excitation source in the explorer by control line respectively; Liquid crystal display can be finished pulsed signal, the real-time demonstration of counting, release light curve and test data that the control of the switch of excitation source and photomultiplier, photomultiplier are passed back, release the storage of light data, and it directly is connected with the ARM machine.
Described darkroom is double-layer shell structure, namely is provided with shell in darkroom base outsourcing; Each interface of described explorer is equipped with hermetically-sealed construction.
Of the present inventionly be equipped with hermetically-sealed construction at each interface of explorer and comprise, be provided with the rubber sealing structure between darkroom base and the darkroom loam cake: be provided with circular sealing colloid packing ring between darkroom loam cake and the darkroom base; Be provided with the rubber cushion hermetically-sealed construction between photomultiplier and the detection optical filter: between photomultiplier and detection optical filter, add the sealing colloid packing ring that is provided with circle.
The every group of excitation source module of host computer control that be subjected to of the present invention become by 10 light emitting diode fabrics.
Mineral samplers support of the present invention adopts replaceable two mineral samplers supports.
ARM machine of the present invention adopts its ingredient of ARM9 model to comprise central processing unit, data storage cell and data acquisition unit; It adopts central processing unit is that S3C2410AL-20 frequency of operation 203MHz, data acquisition unit are the above configuration of EPM7128 frequency of operation 100MHz.
Described in the present invention with the supporting high voltage control module of ARM machine, high-pressure modular, the shaping pulse module, counting module, the blue light control module, infrared control modules etc. all adopt conventional circuit design.
The present invention adopts liquid crystal display to finish light and releases the process control in flash ranging year and release light curve and the real-time demonstration of test data.The present invention disposes USB (universal serial bus) mouth (being the USB mouth) at main frame.
Beneficial effect of the present invention is:
Compared with prior art, the invention has the advantages that:
1. adopt the compensation photomultiplier that background is carried out dynamic compensation, improved the degree of accuracy of dating.
2. two photomultiplier models are identical, it is identical that institute adds detection optical filter model specification, and adopt to overlap on the well behaved photomultiplier of heat-conductivity conducting and connect, the test darkroom is identical with background darkroom structure, guaranteed that two photomultiplier external environment conditions are identical, improved the accuracy of background dynamic compensation.
3. adopt double casing structure and many places that packing washer is set, improved the sealing in darkroom.
4. the print support adopts interchangeable pair of mineral print support, has improved light and has released light-year for the efficient of test, has reduced the instrument volume simultaneously, has alleviated instruments weight.
5. exciter filter is housed simultaneously and surveys optical filter, can effectively distinguish exciting light and release light, improved the precision of releasing photodetection.
6. engine control system adopts the ARM machine, and operating system is WINCE, has improved arithmetic speed and precision, has alleviated instruments weight.
7. have the USB mouth on the ARM main control computer, make things convenient for the transmission of data.
8. the employing of liquid crystal display makes instrumentation simple, and can show in real time and release light curve and test data.
In a word, the present invention has designed a kind of mineral dating instrument with background compensate function, can be in mineral dating process simultaneously at the bottom of the minute book, thus eliminate background for the influence of dating, improve and release light-year for the accuracy of measuring; And adopt the Arm machine to carry out the control of whole mineral samplers dating process, it is little for volume to have satisfied geological instrument, lightweight requirement.It is little, in light weight that the present invention has a volume, good airproof performance, highly sensitive, dynamic compensation, advantage such as easy to operate.
Description of drawings
Accompanying drawing 1 is the general structure synoptic diagram of the embodiment of the invention;
Accompanying drawing 2 is the front view in the darkroom of the embodiment of the invention;
Accompanying drawing 3 is the vertical view of the darkroom base of the embodiment of the invention;
Accompanying drawing 4 is the host work theory diagram of the embodiment of the invention;
Accompanying drawing 5 is released light curve (additional dose method) for the light of the embodiment of the invention;
Accompanying drawing 6 is released light curve and its background curve same period (additional dose method) for the N+4 β of the embodiment of the invention;
Accompanying drawing 7 is released the long curve of photoproduction (additional dose method) for the embodiment of the invention;
Accompanying drawing 8 is A partial enlarged drawing among Fig. 2 of the embodiment of the invention;
Accompanying drawing 9 is B partial enlarged drawing among Fig. 2 of the embodiment of the invention;
Accompanying drawing 10 is noose composition on the photomultiplier of the embodiment of the invention;
Accompanying drawing 11 is the host software workflow diagram of the embodiment of the invention;
Accompanying drawing 13 is the age computing module workflow diagram of the embodiment of the invention;
Accompanying drawing 15 is the environment temperature of the embodiment of the invention and the relation curve of background.
Among the figure: 1. darkroom, 2. testing photoelectronic multiplier tube, 3. background compensation photomultiplier, 4. control line one, and 5. control line two, 6. main frame, 7. the darkroom loam cake is 8. surveyed optical filter one, 9. overlaps on the photomultiplier, 10. survey optical filter two, 11. print support handles, 12. darkroom shells, 13. background mineral print, 14. blue-light source modules, 15. exciter filters, 16. test mineral print, 17. print supports, 18. infrared light supply modules, 19. the darkroom base, 20. test darkrooms, 21. background darkrooms, 22.ARM machine, 23. liquid crystal display, 24. high voltage control modules, 25. high-pressure modulars, 26. shaping pulse module, 27. counting module, 28. blue light control modules, 29. infrared control modules, 30. packing washer one, 31. packing washer two.
Embodiment
As shown in Figure 1, the embodiment of the invention is a kind of mineral dating instrument with background bucking-out system, relates to mineral received radiation dose during very long burying is measured, thereby determines its age.Present embodiment comprises two major parts: explorer and main frame 6 that darkroom 1, testing photoelectronic multiplier tube 2 and background compensation photomultiplier 3 are formed; In the explorer photomultiplier 2 and 3 with main frame 6 between be connected by control line 1, the electric pulse that 6 pairs of photomultipliers 2 of main frame and 3 control signal and photomultiplier 2 and 3 transform out is transmitted by control line 1; Connect by control line 25 between darkroom 1 and the main frame 6,6 pairs of excitation source modules 14 of main frame and 18 switch controlling signal are then by control line 25 transmission.
As Fig. 2, shown in 3, darkroom that present embodiment is told 1 comprises the identical test of shape darkroom 20 and background darkroom 21, each darkroom comprises darkroom shell 12, darkroom loam cake 7, darkroom base 9, testing photoelectronic multiplier tube 2 and background compensation photomultiplier 3 all is fixed on separately the darkroom loam cake 7, and 9 link together by cover on the photomultiplier, the front end of testing photoelectronic multiplier tube 2 passes darkroom loam cake 7 over against the central authorities of test darkroom 20 build-in test mineral prints 16, the front end of background compensation photomultiplier 3 passes the central authorities of darkroom loam cake 7 20 interior background mineral prints 13 over against the background darkroom, the optical filter 1 of detection is fixedly arranged before the testing photoelectronic multiplier tube 2, before the background compensation photomultiplier 3 optical filter 2 10 of detection is arranged fixedly, darkroom base 19 is provided with the excitation source module that is subjected to main frame 6 controls: comprise blue-light source module 14 and infrared light supply module 18, blue-light source module 14 is consistent with the lighting angle of infrared light supply module 18, its spot center is positioned at test mineral print 16 centers, be provided with dismountable mineral print support 17 at darkroom base 19, be placed with test mineral print 16 and background mineral print 13 above, their center aligns with the center of testing photoelectronic multiplier tube 2 and background compensation photomultiplier 3 respectively.
Blue light source module 14 and infrared light supply module 18 are 2 groups, formed by 10 light emitting diodes for every group, during operate as normal, the intensity that arrives test mineral print 16 be 89mW/cm2 (a little less than this intensity or be higher than this intensity all can).
It is identical with respect to the photomultiplier position to add print in described each darkroom.And testing photoelectronic multiplier tube 2 is identical with background compensation photomultiplier 3 models, two photomultiplier fronts add that to survey optical filter 8 identical with 10 model specifications, two photomultipliers are connected by cover 9 on the good photomultiplier of electric conductivity and thermal conductivity, therefore can guarantee two photomultipliers 2 identical with 3 external environment conditions of living in (being that temperature is identical with electric field), strengthen the accuracy (as Fig. 3) of background dynamic compensation.
As shown in Figure 4, the described main frame 6 of the embodiment of the invention comprises ARM machine 22, liquid crystal display 23, high voltage control module 24, high-pressure modular 25, shaping pulse module 26, counting module 27, light source control module comprises blue light control module 28 and infrared control module 29, is connected with signal wire by control line between them.The principle of work of main frame 6 is: at first send high voltage control signal by liquid crystal display 23, control by the power supply of 24 pairs of high-pressure modulars 25 of high voltage control module, and then control the output of its high pressure.After photomultiplier 2 and 3 adds high pressure, wait for half an hour, stable to it.And then send control signal by 23 pairs of blue light control modules 28 of liquid crystal display or infrared control module 29, open blue light source 14 or infrared light supply 18, release optical excitation, photomultiplier 2 and 3 detects photon, change into electric pulse, electric pulse is input to shaping pulse module 26, amplifies shaping, sends into counting module 27 again and carries out step-by-step counting.The 22 same opening and closing by control signal gating pulse counting module 27 of ARM machine.Introduce each module below respectively.
1. ARM machine: the model of ARM machine is that ARM9(can replace with similar ARM machine model).Its ingredient comprises central processing unit, data storage cell and data acquisition unit, adopts the operating system based on Windows CE.The central processing unit of present embodiment is the little process chip of the high integration of SAMSUNG company, and model is S3C2410AL-20, frequency of operation 203MHz.Its data storage cell is two sdram memorys, and model is HY57V561620BT-H; A slice NandFlash storage chip, model are U-K9F1208UDM-YC80; A slice Nor Flash memory chip, model are 29VL800; The SD card that capacity is 1G; External 2 USB interface.Its data acquisition unit adopts a slice programmable chip, and model is EPM7128, and its frequency of operation is 100MHz, is used for realizing the switch of high-speed data acquisition and gating pulse Shaping Module 26, high-pressure modular 25 and light source module 14 and 18.If adopt the ARM machine of other types in the present invention then its configuration adjusts accordingly, can adopt higher configuration.
2. the high voltage control module 24, the little current controling signal that ARM machine 22 is sent, adopt triode to carry out signal and amplify, and control the on/off of high-pressure modular 25 by the on-off function of triode under the different voltages, thereby control the duty of 2 photomultipliers 2 and 3 simultaneously.
3. light source control module 28 and 29, the little current controling signal that ARM machine 22 is sent, adopting triode to carry out signal amplifies, and control the on/off of light source module 14 and 18 by the on-off function of triode under the different voltages, thereby control the duty of photomultiplier (2 and 3) simultaneously.
4. high-pressure modular 25, and its supply voltage is 12V (by 24 controls of high voltage control module), and output voltage is 0-1500V, and output voltage values can be adjusted voluntarily by the adjustable resistance that module carries.
5. shaping pulse module 26, photomultiplier 2 and 3 is converted into electric pulse with the Light releasing photon that receives through multistage multiplication, pass electric pulse back main frame 6 by pulse transmission line again, shaping pulse module 26 at first adopts the two-stage transistor amplifier that pulse signal is amplified, adopt comparer MAX913 pulse signals to carry out shaping then, noise signal is removed, and the data acquisition module of then square-wave signal that forms being imported ARM machine 22 is further processed.
6. liquid crystal display 23, adopt touch-screen to finish light and release the setting of light initial parameter, and photomultiplier 2 and 3 and the switch control of light source module 14 and 18 is released the real-time demonstration of light curve and test data, functions such as data storage.
As shown in Figure 5, light is released in the dating of light mineral, adopts the additional dose method to ask the dose,equivalent of mineral samplers, needs to measure the natural light of releasing light curve, the different irradiation doses of interpolation and releases the background curve of light curve and the same period.Among the figure, the light curve of releasing from top to bottom is respectively the natural light+4 times radiation dose (N+4 β) of releasing and releases light curve, and N+3 β releases light curve, and N+2 β releases light curve, and N+1 β releases light curve, and N releases light curve and background curve.
As seen from Figure 5, along with the increase of radiation dose, release the regular increase of light curve integral area value.
As shown in Figure 6, when adopting the additional dose method to ask the dose,equivalent of mineral samplers, mensuration natural released the background curve that light+4 times radiation dose (N+4 β) is released light curve and its same period.
As shown in Figure 7, the additional dose method is to release the long curve of photoproduction by foundation, and namely N+ β releases the light growth curve, utilizes its epitaxial part to determine dose,equivalent De value.Light is as shown in Figure 5 and Figure 6 released and can be obtained following table after the light curve integral and calculating finishes.
| ? | Irradiation dose | Light is released the light curve integrated value | The same period background curvilinear integral value |
| Natural sample | X 1 | Y 1 | Y 1d |
| Natural+1 β irradiation sample | X 2 | Y 2 | Y 2d |
| Natural+2 β irradiation samples | X 3 | Y 3 | Y 3d |
| …… | ? | ? | ? |
| Natural+n β irradiation sample | X n | Y n | Y nd |
Actual light is released the light curve integrated value and is tried to achieve by following formula:
Yir=Yi-Yid
Yir: actual light is released the light curve integrated value; Yi: the light that test obtains is released the light curve integrated value; Yid: the background curvilinear integral value of the same period.
Then with irradiation dose as X-axis, actual light is released the light curve integrated value as Y-axis, makes corresponding point in the drawings, draws straight-line equation y=ax+b.A wherein, the b parameter calculation formula is:
a=
,?b=
。
Make straight line as shown in Figure 7 then.When y=0, try to achieve x=-b/a, get | the x| value is equivalent agent value De.Equivalent agent value De has been arranged, calculated Dy by formula again, can obtain the age value t of mineral samplers.
As shown in Figure 8, added circular sealing colloid packing ring 30 between testing photoelectronic multiplier tube 2 and detection optical filter 1, central diameter is 33mm, and thickness is 1mm.
As shown in Figure 9, added circular sealing colloid packing ring 31 between darkroom loam cake 7 and darkroom base 19, central diameter is 66mm, and thickness is 2mm.
As shown in figure 10, connect testing photoelectronic multiplier tube 2 and background compensation photomultiplier 3 by cover on the photomultiplier 9, this loam cake is made by electric conductivity and the good material of thermal conductivity, can guarantee two photomultipliers 2 identical with 3 external environment conditions (comprising temperature and electric field etc.), and then guarantee the accuracy of background dynamic compensation.
As shown in figure 11, the concrete workflow of mineral dating instrument is as follows: at first, to test mineral samplers 16 and background mineral samplers 13 is positioned in the sample holder 17, promote print support handle 11 then print support 17 pushed in the darkroom 1 together with 2 prints 16 and 13, make the test mineral samplers (16 and background mineral samplers 13 lay respectively at testing photoelectronic multiplier tube 2 and local compensation photomultiplier 3 under.Carry out light by touch-screen 23 and release light-year for the parameter setting of measuring, send control signal then, at first open the photon counting function, this moment, photon count value should be 0, open the high pressure of photomultiplier 2 and 3 then simultaneously, after waiting for half an hour behind photomultiplier 2 and 3 steady operations, opening excitation source 14 and 18 pairs test mineral samplers 16 then excites, the photon that radiates receives by surveying the tested photomultipliers 2 in optical filter one 8 backs, and meanwhile the exciting light optical filter 1 that then can be excited blocks.And background compensation photomultiplier 3 meanwhile carries out mineral samplers and releases background test in the optical tests process.Photomultiplier 2 and 3 receives releases the multistage dynode system of light pulse by its inside and all is converted into electric impulse signal, is returned to main frame 6.Each the module cooperative work of control system in the main frame 6, with the dating data of these original mineral samples and the background data of measuring are simultaneously stored, curve shows and further data handle, obtain the age data of mineral samplers, finish the mensuration in mineral age, also can raw data be derived by USB flash disk, handle at the enterprising line data of other computing machine.
The control application software of main frame is mainly used in sample is measured and the data of gathering are carried out analyzing and processing, thereby obtains the age of sample.Program is made of parameter setting, data acquisition, age calculating, browsing data and data export function module.
1. parameter setting module, it is used for test and preserve the running software parameter, by this module the instrument acquisition time can be set, the radiation source type, α, β, γ unit's irradiation dose and counting modified value are called for other program module run duration.
2. data acquisition module is used for original classification collection and the storage of releasing light data and background data.
3. the age computing module is used for obtaining dose,equivalent and the annual dose of mineral print, and obtaining the age of mineral samplers by the dose,equivalent computing formula.
4. the browsing data module is used for browsing image data, has contrast and shows image data curve, derived curve figure and curve smoothing Presentation Function.
5. data derive module provides export to USB flash disk and deleted file function.
As shown in figure 12, the workflow of data acquisition module is: at first select acquisition parameter (as acquisition time, radiation source type, α, β, γ unit's irradiation dose etc.), judge whether it is first print then, if not first print, just expression still is the test data with a kind of print, provide so prompting " removing legacy data? " after carrying out corresponding answer as required, then enter data acquisition, and if first print so directly enters data acquisition.After data acquisition is finished, preserve collection result, inquire " gathering next print? " if, select to continue to gather, revise acquisition parameter as required, gather again, otherwise EOP (end of program).
As shown in figure 13, the workflow of age computing module is: at first selective light is released light-year for the test parameter of measuring, judge whether it is first print then, if not first print, then be back to the selection test parameter, then carry out releasing the light value collection with a kind of different radiation dose of print, until being first print (namely go up a kind of mineral print tested finish), the natural light that just begins to calculate mineral samplers is released light curve, the light that adds different radiation dose is released the area integral of the background curve of light curve and the same period, calculate the equivalent annual dose of mineral samplers then according to selected dose,equivalent computing method, calculate the year radiation dose value of mineral samplers environment of living in again, just can calculate the age of mineral samplers then, final program finishes.
As shown in figure 14, mineral print support of the present invention adopts interchangeable pair of mineral print structure 17, can place test mineral print 16 and background mineral print 13 simultaneously.
As shown in figure 15, the bias light subnumber progressively raises along with the rising of environment temperature, and the analog function of this curve is
LnY=0.1T-0.1。
Among the figure, the bias light subnumber that records in the time of 20 ℃ is 79, and temperature is elevated to 25 ℃, and the bias light subnumber is 268, and temperature is elevated to 30 ℃, and the bias light subnumber is 789.As seen from Figure 15, light is released light-year in the mensuration process, the variation of environment temperature, and the influence of releasing at the bottom of the trimmed book for light is very big, and then the light that real-time background compensation is not carried out in bigger influence is released light-year for the measurement result degree of accuracy.
Compared with prior art, the invention has the advantages that:
1. adopt the compensation photomultiplier that background is carried out dynamic compensation, improved the degree of accuracy of dating.
2. two photomultiplier models are identical, it is identical that institute adds detection optical filter model specification, and adopt to overlap on the well behaved photomultiplier of heat-conductivity conducting and connect, the test darkroom is identical with background darkroom structure, guaranteed that two photomultiplier external environment conditions are identical, improved the accuracy of background dynamic compensation.
3. adopt double casing structure and many places that O-ring seal is set, improved the sealing in darkroom.
4. the print support adopts interchangeable pair of mineral print support, has improved light and has released light-year for the efficient of test, has reduced the instrument volume simultaneously, has alleviated instruments weight.
5. exciter filter is housed simultaneously and surveys optical filter, effectively distinguish exciting light and sample is released light, improve and release the photodetection precision.
6. engine control system adopts the ARM machine, and operating system is WINCE, has alleviated instruments weight.
7. have the USB mouth on the ARM main control computer, make things convenient for the output of data.
8. the employing of liquid crystal display makes instrumentation simple, and can show in real time and release light curve and test data.
Claims (7)
1. mineral dating instrument with background compensate function is characterized in that: described mineral dating instrument comprises explorer and the main frame that connects by control line;
Described explorer comprises test darkroom (20) and background darkroom (21) that link into an integrated entity side by side, and both are referred to as darkroom (1); And being installed in testing photoelectronic multiplier tube (2) and the background compensation photomultiplier of testing on darkroom (20) and background darkroom (21) (3) respectively, described each darkroom (1) comprises darkroom shell (12), darkroom loam cake (7), darkroom base (19); Testing photoelectronic multiplier tube (2) and background compensation photomultiplier (3) all is individually fixed on separately the darkroom and covers, testing photoelectronic multiplier tube and background compensation photomultiplier links together by cover (9) on the good photomultiplier of electric conductivity and thermal conductivity, the front end of testing photoelectronic multiplier tube and background compensation photomultiplier passes the loam cake in darkroom separately respectively, before testing photoelectronic multiplier tube and the background compensation photomultiplier detection optical filter 1,2(8,10 is arranged fixedly respectively); Darkroom base (19) is bucket-shaped, central part at test darkroom and background darkroom base is separately installed with dismountable mineral print support (17), be placed with test mineral prints (16) and background mineral print (13) on the mineral print support (17) respectively, the center of each print aligns with the center that testing photoelectronic multiplier tube and background compensate photomultiplier respectively; Test darkroom base oblique domatic be set be connected with main frame be subjected to host computer control about two groups of excitation sources (14,18), it is consistent that each organizes the lighting angle of excitation source (14 and 18), its spot center is positioned at test mineral prints (16) center, and excitation source (14,18) is preceding fixedly exciter filter (15);
Described test darkroom and background darkroom shape and structure are identical, it is identical with background photomultiplier position with respect to the testing photoelectronic multiplier tube that institute adds print, and testing photoelectronic multiplier tube and background compensation photomultiplier model is identical, and the set detection optical filter model specification in two photomultiplier fronts is identical;
Described main frame comprises the ARM machine (22) that is connected with signal wire by control line, liquid crystal display (23), high voltage control module (24), high-pressure modular (25), shaping pulse module (26), counting module (27), light source control module comprise blue light control module (28) and infrared control module (29); ARM machine (22) output high voltage control signal is connected to high voltage control module (24), high voltage control module (24) is connected to high-pressure modular (25) by control line, the output of high-pressure modular (25) is connected to testing photoelectronic multiplier tube (2) and the background compensation photomultiplier (3) in the explorer, described two photomultipliers (2,3) detect behind the photon output pulse signal shaping pulse module (26) in the main frame, shaping pulse module (26) output signal is to counting module (27), and ARM machine (22) is connected with counting module (27) by control line; ARM machine (22) output light source control signal is to light source control module (28,29), and light source control module (28,29) is connected to excitation source (14,18) in the explorer by control line respectively; Liquid crystal display (23) can be finished pulsed signal, the real-time demonstration of counting, release light curve and test data that the control of the switch of excitation source and photomultiplier, photomultiplier are passed back, release the storage of light data, and it directly is connected with ARM machine (22);
Described test darkroom and described background darkroom are double-layer shell structure, namely are provided with shell in darkroom base outsourcing; Each interface of described explorer is equipped with hermetically-sealed construction.
2. the mineral dating instrument with background compensate function according to claim 1, it is characterized in that: describedly be equipped with hermetically-sealed construction at each interface of explorer and comprise, be provided with the rubber sealing structure between darkroom base and the darkroom loam cake: be provided with circular sealing colloid packing ring between darkroom loam cake and the darkroom base; Be provided with the rubber cushion hermetically-sealed construction between photomultiplier and the detection optical filter: between photomultiplier and detection optical filter, add the sealing colloid packing ring that is provided with circle.
3. the mineral dating instrument with background compensate function according to claim 1 is characterized in that testing the darkroom and background darkroom structure is identical.
4. the mineral dating instrument with background compensate function according to claim 1 is characterized in that the described every group of excitation source module of host computer control that be subjected to become by 10 light emitting diode fabrics.
5. the mineral dating instrument with background compensate function according to claim 1 is characterized in that the mineral samplers support adopts replaceable two mineral samplers supports.
6. the mineral dating instrument with background compensate function according to claim 1 is characterized in that described ARM machine adopts the ARM9 model, and its ingredient comprises central processing unit, data storage cell and data acquisition unit; It adopts central processing unit is that S3C2410AL-20 frequency of operation 203MHz, data acquisition unit are the above configuration of EPM7128 frequency of operation 100MHz.
7. the mineral dating instrument with background compensate function according to claim 1 is characterized in that disposing the USB (universal serial bus) mouth at main frame, i.e. the USB mouth.
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| CN 201110065899 CN102175663B (en) | 2011-03-18 | 2011-03-18 | Mineral age tester with background compensation function |
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| CN104655593A (en) * | 2015-01-21 | 2015-05-27 | 中国科学院广州地球化学研究所 | Pulse-excitation-based optically stimulated luminescence measurement and control device |
| CN109115732B (en) * | 2018-08-02 | 2021-07-13 | 华南理工大学广州学院 | Sensitivity correction method for photoluminescence yearly experiment |
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Effective date of registration: 20141226 Address after: 050031 Institute of Opto electronics, Shijiazhuang University Of Economics, No. 136 Huai Dong Road, Hebei, Shijiazhuang Patentee after: Shijiazhuang University of Economics Patentee after: Electric Power Research Institute, State Grid Jilin Power Co., Ltd. Patentee after: Jilin Academy of Electric Power Science Address before: 050031 Institute of Opto electronics, Shijiazhuang University Of Economics, No. 136 Huai Dong Road, Hebei, Shijiazhuang Patentee before: Shijiazhuang University of Economics |