CN102661940A - Multi-wavelength near-infrared fluorescence quantum dot detection device - Google Patents
Multi-wavelength near-infrared fluorescence quantum dot detection device Download PDFInfo
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- CN102661940A CN102661940A CN2012101571241A CN201210157124A CN102661940A CN 102661940 A CN102661940 A CN 102661940A CN 2012101571241 A CN2012101571241 A CN 2012101571241A CN 201210157124 A CN201210157124 A CN 201210157124A CN 102661940 A CN102661940 A CN 102661940A
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Abstract
The invention discloses a multi-wavelength near-infrared fluorescence quantum dot detection device, comprising a fluorescence scanning module, a translation motor and a signal analysis processing module. The fluorescence scanning module comprises a laser diode, a light filter, a stepping motor, a chromatic dispersion device and a photomultiplier; the laser diode is arranged in front of a fluorescence quantum dot bar-shaped code, and an emitted light direction of the laser diode is vertical with the surface of the bar-shaped code; the light filter, the chromatic dispersion device and the photomultiplier are sequentially arranged along a reflection fluorescence direction; the translation motor drives the fluorescence scanning module to entirely move; the signal analysis processing module comprises an A/D (Analogue/Digital) converting module, a single chip microcomputer module, a key module and a display module; the A/D converting module carries out A/D conversion on electric signals of the photomultiplier, and then sends the converted electric signals into the single chip microcomputer module; and a result is sent to the display module after judgment. The detection device can scan the one-dimensional bar-shaped code with the multi-wavelength near-infrared fluorescence quantum dot to obtain encoded fluorescence information contained in the bar-shaped code, and can carry out analysis comparison and judge whether merchandise is true or false.
Description
Technical field
The invention belongs to anti-counterfeiting information identification field, particularly a kind of multi-wavelength near infrared fluorescence quantum point pick-up unit.
Background technology
The semiconductor fluorescence quantum dot is exactly the focus of people research all the time, and it can produce strong fluorescence reflection when receiving light stimulus, and the fluorescent emission wavelength regulated and control by particle size, comprises visible light and near-infrared band.The quantum dot chemical property is stable, can stand to excite repeatedly, and the preparation environmental parameter is strict, and imitation difficulty is high.At present fluorescence quantum has been applied to printing technique, fluorescent markers such as quantum dot and ink is mixed the back print, and through light source activation, monitors the reflectance spectrum of quantum dot, compares with presupposed information, can tell truth from falsehood.For increasing false proof reliability, the technology of using dual wavelength or multi-wavelength fluorescence quantum to print has also appearred, through coding, detect, decoding, can carry out false proof after the contrast.Occurred multiple fluorescent quantum point detection device at present, as adopted modular thought, realized detection, but can not detect the multi-wavelength fluorescence quantum fluorescent signals; Or adopt fiber spectrometer as the fluoroscopic examination device, can wavelength of fluorescence and strength information, but because the existence of upper PC makes this device can not realize portability well.
Based on all deficiencies of existing fluorescent quantum point detection device, the inventor attempts to research and develop the better quantum dot pick-up unit of a kind of performance, and this case produces thus.
Summary of the invention
The object of the invention; Be to provide a kind of multi-wavelength near infrared fluorescence quantum point pick-up unit, it can scan the one-dimensional bar code that contains the multi-wavelength fluorescence quantum, obtains the coding fluorescence information that comprises in the bar code; And can analyze comparison to it, judge commodity true and false.
In order to reach above-mentioned purpose, solution of the present invention is:
A kind of multi-wavelength near infrared fluorescence quantum point pick-up unit comprises fluorescent scanning module, translation motor and signal analysis and processing module;
The fluorescent scanning module comprises laser diode, optical filter, stepper motor, dispersion means and photomultiplier; Wherein, Laser diode is located at the place ahead of fluorescence quantum bar code; And the Surface Vertical of its emission light direction and fluorescence quantum bar code, the excitation wavelength that said laser diode sent is less than the minimum value in the fluorescence quantum characteristic peak wavelength in the bar code; Said optical filter, dispersion means, photomultiplier all are located at the place ahead of fluorescence quantum bar code; And along the order setting successively of reflected fluorescent light direction; The axis of optical filter is parallel with the emission light direction of laser diode; And the plane of dispersion means is vertical with the axis of optical filter, and the use wave band of said dispersion means comprises all characteristic peak wavelength of selected fluorescence quantum, this dispersion means also with the stepper motor mechanical connection; Under the drive of stepper motor, in designated magnitude, swing, the monochromatic light through dispersion means can both be detected by photomultiplier with special speed; The relative position of said photomultiplier and dispersion means immobilizes;
Translation motor links to each other with aforementioned fluorescent scanning module machinery, and drive fluorescent scanning module whole moves;
The signal analysis and processing module comprises A/D modular converter, one-chip computer module, key-press module and display module; Wherein, The input end of A/D modular converter connects the output terminal of photomultiplier; And the output terminal of A/D modular converter connects the input end of one-chip computer module, and the output electric signal of photomultiplier is carried out sending into one-chip computer module after the A/D conversion; Said one-chip computer module is analyzed the digital signal from the A/D modular converter that receives and is judged that relatively commodity true and false, result send into display module and show; Said one-chip computer module also is connected with key-press module, the rotation of control the exciting of laser diode, stepper motor and translation motor under the input signal of key-press module.
Above-mentioned optical filter adopts long pass filter or trap optical filter.
Above-mentioned dispersion means adopts grating or prism.
After adopting such scheme; The present invention contains the one-dimensional bar code of fluorescence quantum through monochromatic excitation light source vertical irradiation, and reflected light is the filtering exciting light behind optical filter, and residue fluorescence is separated into the monochromatic light of different wave length through dispersion means; Stepper motor drives the dispersion means rotation; All monochromatic light are received by photomultiplier, and the output electric signal is changed through A/D, through single-chip microcomputer analysis and demonstration identification result.The present invention has following beneficial effect:
(1) can be used to detect multi-wavelength fluorescence quantum bar code, judge commodity true and false;
(2) device is portable integrated, does not need the PC deal with data, is of value to commercialization;
(3) can combine with the fluorescence quantum-dot coding anti-counterfeiting technology, form the complete Antiforge system of a cover, produce huge social benefit and economic benefit.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Below will combine accompanying drawing, technical scheme of the present invention will be elaborated.
As shown in Figure 1, the present invention provides a kind of multi-wavelength near infrared fluorescence quantum point pick-up unit, comprises fluorescent scanning module, translation motor and signal analysis and processing module, introduces respectively below.
The fluorescent scanning module comprises laser diode (LED) 2, optical filter 3, stepper motor 4, dispersion means 5 and photomultiplier (PMT) 6; Wherein, Laser diode 2 is located at the place ahead of fluorescence quantum bar code 1; And the Surface Vertical of its emission light direction and fluorescence quantum bar code 1, the excitation wavelength that said laser diode 2 is sent is less than the minimum value in the fluorescence quantum characteristic peak wavelength in the fluorescence quantum bar code 1; Optical filter 3 also is located at the place ahead of fluorescence quantum bar code 1; And its axis is parallel with the emission light direction of laser diode 2; This optical filter 3 is used for the filtering exciting light, to reduce the interference of exciting light to fluoroscopic examination as much as possible, can adopt long pass filter or trap optical filter; Said optical filter 3, dispersion means 5, photomultiplier 6 are provided with along reflected fluorescent light direction order successively; And the plane of dispersion means 5 is vertical with the axis of optical filter 3; The use wave band of said dispersion means 5 comprises all characteristic peak wavelength of selected fluorescence quantum; And efficiency curve distributes rationally, thereby makes fluorescence electronics point characteristic peak transmitance higher, can adopt grating or prism; Said dispersion means 5 also with stepper motor 4 mechanical connections, can under the drive of stepper motor 4, in designated magnitude, swing with a certain speed, the monochromatic light through dispersion means 5 can be detected by photomultiplier 6; Said photomultiplier 6 is positioned at the rear of dispersion means 5 by the reflected fluorescent light direction of propagation, and the relative position of itself and dispersion means 5 immobilizes, and is used for the monochromatic light of all wavelengths is converted into electric signal.
The signal analysis and processing module comprises A/D modular converter 8, one-chip computer module (MCU) 9, key-press module 10 and display module 11; Wherein, The input end of A/D modular converter 8 connects the output terminal of photomultiplier 6; And the output terminal of A/D modular converter 8 connects the input end of one-chip computer module 9, is used for the output electric signal of photomultiplier 6 is carried out sending into one-chip computer module 9 after the A/D conversion; Said one-chip computer module 9 carries out the detection Algorithm Analysis to the digital signal from A/D modular converter 8 that receives on the one hand; Obtain the fluorescence peak proportioning; Obtain raw information through the translation of corresponding codes rule, analyze and relatively judge commodity true and false, the result sends into display module 11 and shows; Said one-chip computer module 9 also is connected with key-press module 10, the rotation of control the exciting of laser diode 2, stepper motor 4 and translation motor 7 under the input signal of key-press module 10.
During work; Extraneous via key-press module 10 input instructions; Control single chip computer module 9 is sent scan instruction; Trigger the exciting light vertical irradiation of laser diode 2 emission wavelengths and contain multi-wavelength fluorescence quantum bar code 1 for
; Reflected light contains excitation wavelength
and wavelength of fluorescence
; Behind optical filter 3, obtain containing the polychromatic light of wavelength of fluorescence
; The monochromatic light that after dispersion means 5, disperses to obtain
again; Dispersion means 5 is driven by stepper motor 4 rotates in certain angle, makes the monochromatic light of all wavelengths all received and be converted into electric signal by photomultiplier 6.Translation motor 7 drives the fluorescent scanning module by assigned rate and moves by the bar code orientation; Detect all bar code informations; Electric signal obtains digital quantity and gives one-chip computer module 9 after A/D modular converter 8 is handled, after the detection Algorithm Analysis, obtain the fluorescence peak proportioning, obtains raw information through the translation of corresponding codes rule; Relatively judge commodity true and false through analyzing, the result is shown by display module 11.
Above embodiment is merely explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought that proposes according to the present invention, and any change of on the technical scheme basis, being done all falls within the protection domain of the present invention.
Claims (3)
1. a multi-wavelength near infrared fluorescence quantum point pick-up unit is characterized in that: comprise fluorescent scanning module, translation motor and signal analysis and processing module;
The fluorescent scanning module comprises laser diode, optical filter, stepper motor, dispersion means and photomultiplier; Wherein, Laser diode is located at the place ahead of fluorescence quantum bar code; And the Surface Vertical of its emission light direction and fluorescence quantum bar code, the excitation wavelength that said laser diode sent is less than the minimum value in the fluorescence quantum characteristic peak wavelength in the bar code; Said optical filter, dispersion means, photomultiplier all are located at the place ahead of fluorescence quantum bar code; And along the order setting successively of reflected fluorescent light direction; The axis of optical filter is parallel with the emission light direction of laser diode; And the plane of dispersion means is vertical with the axis of optical filter, and the use wave band of said dispersion means comprises all characteristic peak wavelength of selected fluorescence quantum, this dispersion means also with the stepper motor mechanical connection; Under the drive of stepper motor, in designated magnitude, swing, the monochromatic light through dispersion means can both be detected by photomultiplier with special speed; The relative position of said photomultiplier and dispersion means immobilizes;
Translation motor links to each other with aforementioned fluorescent scanning module machinery, and drive fluorescent scanning module whole moves;
The signal analysis and processing module comprises A/D modular converter, one-chip computer module, key-press module and display module; Wherein, The input end of A/D modular converter connects the output terminal of photomultiplier; And the output terminal of A/D modular converter connects the input end of one-chip computer module, and the output electric signal of photomultiplier is carried out sending into one-chip computer module after the A/D conversion; Said one-chip computer module is analyzed the digital signal from the A/D modular converter that receives and is judged that relatively commodity true and false, result send into display module and show; Said one-chip computer module also is connected with key-press module, the rotation of control the exciting of laser diode, stepper motor and translation motor under the input signal of key-press module.
2. a kind of multi-wavelength near infrared fluorescence quantum point pick-up unit as claimed in claim 1 is characterized in that: said optical filter adopts long pass filter or trap optical filter.
3. a kind of multi-wavelength near infrared fluorescence quantum point pick-up unit as claimed in claim 1 is characterized in that: said dispersion means adopts grating or prism.
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| CN2012101571241A CN102661940A (en) | 2012-05-21 | 2012-05-21 | Multi-wavelength near-infrared fluorescence quantum dot detection device |
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| CN2012101571241A CN102661940A (en) | 2012-05-21 | 2012-05-21 | Multi-wavelength near-infrared fluorescence quantum dot detection device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063642A (en) * | 2012-12-26 | 2013-04-24 | 西北农林科技大学 | Portable multi-index fluorescent biosensor device |
| CN104783762A (en) * | 2015-04-23 | 2015-07-22 | 天津大学 | Imaging optical measurement device for position sine wave frequency coding |
| CN105719563A (en) * | 2016-04-27 | 2016-06-29 | 电子科技大学 | Dual anti-counterfeiting mark and manufacture method thereof |
| CN109558762A (en) * | 2018-11-15 | 2019-04-02 | 无锡火眼睛睛科技发展有限公司 | A kind of anti-fake retrospective device of portable electronic based on bar code |
| CN109583916A (en) * | 2018-11-15 | 2019-04-05 | 无锡火眼睛睛科技发展有限公司 | A kind of electronic anti-fogery traceability system based on bar code |
| CN113851038A (en) * | 2020-11-23 | 2021-12-28 | 北京理工大学 | Anti-counterfeiting and information security method based on near-infrared light-emitting quantum dots |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063642A (en) * | 2012-12-26 | 2013-04-24 | 西北农林科技大学 | Portable multi-index fluorescent biosensor device |
| CN104783762A (en) * | 2015-04-23 | 2015-07-22 | 天津大学 | Imaging optical measurement device for position sine wave frequency coding |
| CN105719563A (en) * | 2016-04-27 | 2016-06-29 | 电子科技大学 | Dual anti-counterfeiting mark and manufacture method thereof |
| CN105719563B (en) * | 2016-04-27 | 2018-09-21 | 电子科技大学 | A kind of preparation method of double anti-forge mark and double anti-forge mark |
| CN109558762A (en) * | 2018-11-15 | 2019-04-02 | 无锡火眼睛睛科技发展有限公司 | A kind of anti-fake retrospective device of portable electronic based on bar code |
| CN109583916A (en) * | 2018-11-15 | 2019-04-05 | 无锡火眼睛睛科技发展有限公司 | A kind of electronic anti-fogery traceability system based on bar code |
| CN109583916B (en) * | 2018-11-15 | 2021-07-06 | 无锡火眼睛睛科技发展有限公司 | Electronic anti-counterfeiting tracing system based on bar codes |
| CN109558762B (en) * | 2018-11-15 | 2021-07-09 | 无锡火眼睛睛科技发展有限公司 | Portable electronic anti-counterfeiting tracing device based on bar codes |
| CN113851038A (en) * | 2020-11-23 | 2021-12-28 | 北京理工大学 | Anti-counterfeiting and information security method based on near-infrared light-emitting quantum dots |
| CN113851038B (en) * | 2020-11-23 | 2022-07-22 | 北京理工大学 | Anti-counterfeiting and information security method based on near-infrared light-emitting quantum dots |
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Application publication date: 20120912 |