CN104655593A - Pulse-excitation-based optically stimulated luminescence measurement and control device - Google Patents
Pulse-excitation-based optically stimulated luminescence measurement and control device Download PDFInfo
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- CN104655593A CN104655593A CN201510031051.5A CN201510031051A CN104655593A CN 104655593 A CN104655593 A CN 104655593A CN 201510031051 A CN201510031051 A CN 201510031051A CN 104655593 A CN104655593 A CN 104655593A
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Abstract
The invention discloses a pulse-excitation-based optically stimulated luminescence measurement and control device. The pulse-excitation-based optically stimulated luminescence measurement and control device comprises a pulse excitation optical source, a sample disc, a photomultiplier, a general signal receiving and control treatment module and an optical source control module, wherein a light outlet of the pulse excitation optical source is connected with a light inlet of the sample disc via an optical fiber; a light outlet of the sample disc is connected with the photomultiplier via an optical fiber; the general signal receiving and control treatment module is respectively connected with the photomultiplier and the optical source control module in a signal mode; the general signal receiving and control treatment module sends a signal to the optical source control module for controlling the excitation optical source, and receives the signal of the photomultiplier, and controls the photomultiplier for analyzing the received signal data. The pulse-excitation-based optically stimulated luminescence measurement and control device has the advantages of adjustable optical source, pulse light emitting, high expansibility, easiness in control, working efficiency improvement, and experiment preparation time and material waste reduction.
Description
Technical field:
The invention belongs to geologic dating equipment technical field, relate to one and release light measure and control device based on pulsed light.
Background technology:
The defect that crystalline solid produces in natural surroundings or the radiation damage caused by posteriori radiation effect, all can cause the defect of crystal structure, thus cause the charge balance in crystal to be destroyed, and generates free (energy storage) electronics.Being present in the energy storage electronics in crystal once the stimulation of external energy can discharge photon.Just be called as light when using luminous energy to excite and release light.What light released that light sends is phosphorescence, and at fixing light source with under identical shooting conditions, light is released the total amount of the light of light and is directly proportional to the number of the energy storage electronics in solid, and the radiation dose namely received to crystal is directly proportional.Here it is, and light releases light technology is applied to the theoretical foundation that mineral samplers (crystal) surveys year.
Existing light is released in light device, excitation source many employings continuous luminous form, and easily cause the lap generation crosstalk with exciting light energy in sample luminescence, the light of the Weak-luminescence of especially little than excitation source several order of magnitude releases light signal.Therefore, release in flash ranging control techniques at existing light, sample light is released to the detection of the faint optical signal of the part close or overlapping with exciting light energy of energy in light signal, mostly take avoidance measure (such as, must according to different excitation sources and sample characteristics of for example, optical filter at the preposition different light-filtering characteristic of photomultiplier), the consequence caused is the illuminated message that this observing and controlling structure will inevitably lose a part of sample, particularly in the geological sample age determination technology releasing optical phenomenon based on light, the light optimized is released light signal and to be selected and comprehensively light is released ray machine reason and understood, all believable bases based on Optical dating.
Summary of the invention:
The object of this invention is to provide a kind of can be the light of quartz and the mineral such as spectra release optical signal detecting be not stimulated energy of light source interference release light measure and control device based on pulsed light, this light release light measure and control device have light source adjustable, pulsed illumination, extendability strong, be easy to control, increase work efficiency, reduce the advantage that Preparatory work of experiment time and materials wastes.
Of the present inventionly release light measure and control device based on pulsed light, it is characterized in that, comprise pulse excitation light source, sample disc, photomultiplier, resultant signal receives control treatment module, light source control module, the described light-emitting window of pulse excitation light source are connected by optical fiber with the light inlet of sample disc, the light-emitting window of sample disc and being connected by optical fiber of photomultiplier, resultant signal receives control treatment module and is connected with photomultiplier and light source control module signal respectively;
Described light source control module accepts resultant signal to receive the signal paired pulses excitation source that control treatment module sends and control, as to excitation source switch, excite interval, optical power adjustment and wavelength chooses;
Described resultant signal receives control treatment module: a, send signal and control excitation source to light source control module; B, accept the signal of photomultiplier, and photomultiplier is controlled, analyzing and processing is carried out to the signal data received.
Preferably, described photomultiplier comprises the high voltage control module that order is connected, testing photoelectronic multiplier tube, amplifier, voltage comparator, photon counter and photomultiplier control module, photomultiplier control module and resultant signal receive control treatment module by signal and are connected, high voltage control module is connected with photomultiplier control module signal, resultant signal receives control treatment module and controls high voltage control module by arranging photomultiplier control module, described testing photoelectronic multiplier tube carries out voltage amplification and exports pulse to voltage comparator after detecting the light Light releasing photon of Optical Fiber Transmission, carry out shaping pulse, output signal is to photon counter, photon number device is transferred to resultant signal finally by photomultiplier control module and receives control treatment module.
Resultant signal receives control treatment module output light source control signal to light source control module, light source control module gating pulse excitation source.The pulsed illumination of gating pulse excitation source receives control treatment module by resultant signal to control, the control of photomultiplier and data receiver, release light curve, test data real-time display, analyze also to receive in control treatment module at resultant signal and carry out.
Preferably, described pulse excitation light source contains the photodiode of three kinds of wavelength, and optical source wavelength is respectively 280nm, 420nm and 840nm.
Preferably, being also provided with in sample disc can to the controlled heating unit of sample heating.
Preferably, also there is independently isotopic radiation source, as ALPHA source and BETA source, make sample after accepting radiation, have and repeat the possibility that light releases light signal occurs, thus light signal released by this sample radiation dose response based on pulsed light can be obtained.
Preferably in sample disc, be also provided with sample introduction platform.
The present invention adopts pulsed illumination and detection, therefore before photomultiplier without the need to optical filter, thus the light of the mineral such as quartz and spectra can be made to release optical signal detecting not to be stimulated the interference of energy of light source, to simplify Preparatory work of experiment step.
The present invention receives control treatment module gating pulse excitation source and photomultiplier by resultant signal, control accurately, the control of pulse excitation light source and photomultiplier, data transmission and process are all receive control treatment module by resultant signal to complete, simple to operate clear.
Therefore of the present inventionly release light measure and control device based on pulsed light there is the advantage that light source adjustable, pulsed illumination, extendability are strong, be easy to control, increase work efficiency and reduce the waste of Preparatory work of experiment time and materials.
Accompanying drawing illustrates:
Fig. 1 of the present inventionly releases flash ranging control apparatus structure schematic diagram based on pulsed light;
Fig. 2 is the signal control schematic diagram releasing light measure and control device based on pulsed light of the present invention;
Fig. 3 is the photoelectric tube multiplier tube composition schematic diagram releasing light measure and control device based on pulsed light of the present invention;
Fig. 4 is the workflow diagram releasing light measure and control device based on pulsed light of the present invention;
Wherein: 1-pulse excitation light source, 2-pushing hands, 3-sample disc, 4-sample introduction platform, 5-computing machine, 6-optical fiber, 7-optical fiber, 8-photomultiplier upper cover, 9-photomultiplier, 10-usb line (connecting pulse excitation light source and computing machine), 11-usb line (connecting photomultiplier and computing machine), 12-excitation source usb interface, 13-light source control module, 14-photodiode, 15-photomultiplier usb interface, 16-high voltage control module, 17-testing photoelectronic multiplier tube, 18-amplifier, 19-voltage comparator, 20-photon counter, 21-photomultiplier control module.
Embodiment:
Following examples further illustrate of the present invention, instead of limitation of the present invention.
Embodiment 1:
As Fig. 1, shown in Fig. 2 and Fig. 3, the present embodiment release light measure and control device based on pulsed light, comprise pulse excitation light source 1, sample disc 3, photomultiplier 9, computing machine 5 (resultant signal receives control treatment module), light source control module 13, the light-emitting window of described pulse excitation light source 1 is connected by optical fiber 6 with the light inlet of sample disc 3 side, the light-emitting window on sample disc top and being connected by optical fiber 7 of photomultiplier 9, computing machine 5 (resultant signal receives control treatment module) is connected with photomultiplier 9 and light source control module 13 signal respectively, sample introduction platform 4 is also provided with in sample disc, in photomultiplier 9 front end, there is photomultiplier upper cover 8,
Described light source control module 13 accepts the signal paired pulses excitation source that computing machine 5 (resultant signal receives control treatment module) sends to control, as to excitation source switch, excite interval, optical power adjustment and wavelength chooses;
Described computing machine 5 (resultant signal receives control treatment module) is: a, send signal and control to light source control module 13 pairs of excitation sources; B, accept the signal of photomultiplier 9, and photomultiplier is controlled, the signal data received is analyzed.
Described pulse excitation light source 1 comprises light-source box and three light emitting diodes 14 be located in light-source box, three light emitting diodes are all fixed on the slideway in light-source box, slideway is connected with the pushing hands 2 on light-source box, is promoted thus select wavelength by the light emitting diode on pushing hands 2 pairs of slideways.The light emitting diode of three kinds of wavelength, optical source wavelength is respectively 280nm, 420nm and 840nm.
Described photomultiplier 9 comprises the high voltage control module 16 that order is connected, testing photoelectronic multiplier tube 17, amplifier 18, voltage comparator 19, photon counter 20 and photomultiplier control module 21, photomultiplier control module 21 is connected with computing machine 5 (resultant signal receives control treatment module) signal, photomultiplier control module 21 is connected with high voltage control module 16 signal, computing machine 5 (resultant signal receives control treatment module) controls high voltage control module 16 by arranging photomultiplier control module 21, described testing photoelectronic multiplier tube 17 carries out voltage amplification and exports pulse to voltage comparator 19 after detecting the light Light releasing photon that optical fiber 7 transmits, carry out shaping pulse, output signal is to photon counter 20, photon number is transferred to computing machine 5 (resultant signal receives control treatment module) finally by photomultiplier control module 21.
Computing machine 5 (resultant signal receives control treatment module) through usb line 10 and pulse excitation light source usb 12 output light source control signal to light source control module 13, light source control module 13 gating pulse excitation source, namely controls photodiode 14 luminous.Computing machine 5 (resultant signal receives control treatment module) the photomultiplier usb interface 15 on usb line 11 and photomultiplier control module 21, high voltage control module 16 is controlled again by photomultiplier control module 21, and then control photomultiplier 9, the control of photomultiplier 9 and data receiver, release light curve, test data real-time display, analyze and be transferred to computing machine 5 by photomultiplier usb interface 15 and usb line 11, undertaken by computing machine 5 (resultant signal receives control treatment module).
In the present embodiment:
Light source control module 13, the Small current control signal that receiving computer 5 sends, by miniwatt board, paired pulses excitation source 1 controls, as gating pulse excitation source switch, excite interval, optical power adjustment and wavelength chooses.Pulse excitation light source pulse must be greater than 20ms interval time.LED supply current is 12V, and electric current can not more than 200mA.In pulse excitation light source three photoelectric diodes, wavelength is the photodiode current scope of 840nm and 450nm is 0-350mA, and wavelength is the photodiode current scope of 280nm is 0-15mA.
Photomultiplier control module 21 pairs of high voltage control modules 16 control.High voltage control module 16, its supply voltage is 5V, and electric current is about 125mA.Preheating time is less than 2s.
Testing photoelectronic multiplier tube 17 can reach 100MHz counting rate, is 100 ~ 200s the dark countings of 20 degree
-1, test interval can not be less than 10ms.
The Light releasing photon received is converted into electric pulse through multistage multiplication by testing photoelectronic multiplier tube 17, again electric pulse is amplified by amplifier 18, then voltage comparator 19 paired pulses is adopted to carry out shaping, form electric signal and carry out photon counting by photon counter 20, be transferred to computing machine 5 finally by the photomultiplier usb interface 15 in photomultiplier control module 21 and usb line 11.
Computing machine 5 completes light and releases the setting of light initial parameter, the switch control rule of photomultiplier 9 and excitation source 1, exports collection period and arranges, release the functions such as the real-time display of light curve and test data
As shown in Figure 4, the present embodiment to release its using method of light measure and control device based on pulsed light as follows: sample is positioned in the groove in the sample introduction platform 4 in sample disc 3, then sample is pushed sample disc, make sample be in sample disc 3 centre.Open pulse excitation light source 1 power supply, the pushing hands 2 above light source is shifted onto suitable wavelength place.Connect pulse excitation light source 1 power supply, pulse excitation light source and photomultiplier detected parameters are set in computing machine 5.Pulse excitation light source 1 starts by the cycle of setting luminous, and exciting light is got on the sample of sample disc 3 by optical fiber 6, and sample starts to release light.The interval that photomultiplier is closed at pulse excitation light source is opened, light is released light and is entered another optical fiber 7 by the light-emitting window above sample disc, optical fiber 7 other end is connected in the photomultiplier upper cover 8 (darkroom) of photomultiplier 9 front end, testing photoelectronic multiplier tube 17 is released light to the light transmitted from optical fiber 7 and to be detected and through signal amplifier 18, voltage comparator 19, photon counter 20, photomultiplier control module 21, and by the photomultiplier usb interface 15 in photomultiplier control module and usb line 11, signal data is transferred in computing machine 5, data are depicted on the image at interface, draw test result and analyze.Design of the present invention is accomplished: instrument photomultiplier upper cover 8 (darkroom) can reach the requirement of abundant lucifuge; Pulse excitation light source, photomultiplier control by computing machine, and time controling is accurate; Computing machine control realization pulsed illumination, photomultiplier, without the need to adding optical filter, can meet the needs of the various occasion sample determination such as scientific research, experiment.
The control application software of computing machine is mainly used in the control of paired pulses excitation source and photomultiplier, to the data analysis process gathered.Program has setting parameter, data acquisition, light to release light curve display, data analysis, statistical conversion function.
Parameter setting module, it is used for testing and preserving running software parameter, is mainly divided into two parts: photomultiplier controls, pulse excitation light source control.By this module can strobe pulse excitation source wavelength, strength of current, light source and photoelectric tube test pulse dutycycle, cycle, reading etc.
Data disaply moudle is used for browsing image data, and display releases light curve, the functions such as derived curve figure.
Data exporting module provides importing to release light data txt, derives the functions such as txt file.
Use the txt file of coordinate and the derivation released on light curve can carry out Analyses of The Background, survey year.
Claims (7)
1. release light measure and control device based on pulsed light for one kind, it is characterized in that, comprise pulse excitation light source, sample disc, photomultiplier, resultant signal receives control treatment module, light source control module, the described light-emitting window of pulse excitation light source is connected by optical fiber with the light inlet of sample disc, the light-emitting window of sample disc and being connected by optical fiber of photomultiplier, and resultant signal receives control treatment module and is connected with photomultiplier and light source control module signal respectively;
Described light source control module accepts resultant signal to receive the signal paired pulses excitation source that control treatment module sends and control;
Described resultant signal receives control treatment module: a, send signal and control excitation source to light source control module;
B, accept the signal of photomultiplier, and photomultiplier is controlled, analyzing and processing is carried out to the signal data received.
2. according to claim 1ly release light measure and control device based on pulsed light, it is characterized in that, described photomultiplier comprises high voltage control module, testing photoelectronic multiplier tube, amplifier, voltage comparator, photon counter and the photomultiplier control module that order is connected, photomultiplier control module and resultant signal receive control treatment module by signal and are connected, high voltage control module is connected with photomultiplier control module signal, and resultant signal receives control treatment module and controls high voltage control module by arranging photomultiplier control module.
3. according to claim 1ly release light measure and control device based on pulsed light, it is characterized in that, described pulse excitation light source contains the photodiode of three kinds of wavelength, and optical source wavelength is respectively 280nm, 420nm and 840nm.
4. according to claim 1ly release light measure and control device based on pulsed light, it is characterized in that, being also provided with in sample disc can to the controlled heating unit of sample heating.
5. according to claim 1ly release light measure and control device based on pulsed light, it is characterized in that also there is independently isotopic radiation source.
6. according to claim 5ly release light measure and control device based on pulsed light, it is characterized in that, described isotopic radiation source is ALPHA radiation source or BETA radiation source.
7. according to claim 1ly release light measure and control device based on pulsed light, it is characterized in that, in sample disc, be also provided with sample introduction platform.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106093997A (en) * | 2016-08-23 | 2016-11-09 | 中国工程物理研究院核物理与化学研究所 | OSL remote gamma-radiation dosimetry system online |
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