CN101477723B - Optical spectrum signal detection method, system and device - Google Patents
Optical spectrum signal detection method, system and device Download PDFInfo
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- CN101477723B CN101477723B CN2008101419233A CN200810141923A CN101477723B CN 101477723 B CN101477723 B CN 101477723B CN 2008101419233 A CN2008101419233 A CN 2008101419233A CN 200810141923 A CN200810141923 A CN 200810141923A CN 101477723 B CN101477723 B CN 101477723B
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Abstract
The invention relates to the technical field of photoelectric detection, and provides a method and equipment for detecting a spectrum signal. The system comprises a to-be-detected material which is irradiated to produce the spectrum signal, and further includes a fundamental frequency laser light source, a spectrum separating unit, a spectrum phase locking detection unit, and a digital signal processing and output unit, wherein, the fundamental frequency laser light source produces highly stable lasers which pass through the to-be-detected material and enable the material to produce the spectrum signal; as the spectrum separating unit presses the fundamental frequency lasers, an effective spectrum signal can be obtained; the spectrum phase locking detection unit detects the effective spectrum signal by the coherence accumulation phase locking integral technology and converts an optical signal to an electrical signal; and the digital signal processing and output unit converts the electrical signal to a digital signal and outputs the digital signal. The invention further provides a method and equipment for detecting the spectrum signal. The method and the equipment for detecting the spectrum signal can be adopted for improving the performance of spectrum signal detection.
Description
Technical field
The present invention relates to survey field of photoelectric technology, more particularly, relate to a kind of optical spectrum signal detection method and system.
Background technology
Development along with laser technology; Laser technology is applied on the discerning the false from the genuine of banknote, certificate or bill more and more; For example, at the below 10X10mm rectangle region of front " people " printed words of the 5th cover Renminbi, can realize real and fake discrimination through the machine-readable signal of laser detection spectrum.
The method that prior art is differentiated the certain material on banknote, certificate or the bill mainly contains: adopt the machine-readable signal cash inspecting machine of portable spectrum; It is to utilize the machine-readable signaling zone of laser radiation spectrum to inspire fluorescence to utilize the subjective identification of human eye mostly; Therefore, do not reach the degree of objective automatic detection.And, when this kind equipment is not protected when laser emission, the user's that may burn eyes and skin.But the machine-readable signal cash inspecting machine of spectrum that also has active detecting in addition.
Prior art is utilized spectral signal to detect and distinguished that the true and false key step of material can reduce: modulated laser light source irradiation measured material is adopted in (1), produces spectral signal; (2) separate with the grating pair spectral signal through two-way prism, obtain effective spectral signal; (3) adopt conventional detector that effective spectral signal is surveyed, detect effective spectral signal, then convert simulating signal output or human eye into and identify.Because prior art adopts the modulated laser light source; The light source of its generation is stable inadequately; And the efficiency ratio of two-way prism and grating selection light is lower, and the detectivity of The common detector is not high; And the realization degree that simulating signal output or employing human eye identify is low, thereby causes the spectral signal detection performance of prior art lower.
Be confined to the performance of prior art; The laser detector outside need of discerning the false from the genuine has shadow shield to cover box to shield extraneous light and disturb, need banknote, certificate or bill be prevented in shadow shield the operation more complicated in actual use; The speed of influence check; And constituent components is many, and power consumption is big, and volume is big.
Therefore need a kind of new optical spectrum signal detection method, system and equipment, can improve the performance that spectral signal detects.
Summary of the invention
One of the object of the invention is to provide a kind of optical spectrum signal detection method and system, is intended to solve the lower problem of prior art performance.
In order to realize goal of the invention; Said system comprises the measured material of its irradiation with the generation spectral signal, also comprises basic frequency laser light source, spectral separation unit, spectrum lock phase probe unit and digital signal processing and output
Said basic frequency laser light source produces the high stable laser radiation to said measured material, inspires spectral signal;
Compacting basic frequency laser in said spectral separation unit obtains effective spectral signal;
Said spectrum lock phase probe unit adopts coherent accumulation lock phase integral technology that effective spectral signal is surveyed, and converts light signal into electric signal;
Said digital signal processing and output unit are digital signal and output with electrical signal conversion.
Preferably, said measured material is the rare earth optical function material, and said effective spectral signal is to go up conversion or following conversion spectrum signal.
In order better to realize said method comprising the steps of goal of the invention:
A. basic frequency laser light source irradiation measured material produces spectral signal;
B. compacting basic frequency laser in spectral separation unit obtains effective spectral signal;
C. spectrum lock phase probe unit adopts coherent accumulation lock phase integral technology to survey effective spectral signal, and converts light signal into electric signal;
D. electric signal is carried out digital signal processing and output.
Preferably, said measured material is the rare earth optical function material, and said effective spectral signal is to go up conversion or following conversion spectrum signal.
By on can know; The present invention is in the process that spectral signal detects, and difference with the prior art has been to adopt the basic frequency laser light source that can produce the high stable LASER Light Source, makes the spectral signal of generation more stable; And spectral separator is when selecting effective spectral signal; Minimum to useful signal decay, to the invalid signals decay greatly, it is higher therefore to select efficient; In addition, in the process that spectral signal detects, difference with the prior art is to adopt spectrum lock phase detector detecting light spectrum signal; Because spectrum lock phase detector exceeds the several number magnitude to the detectivity of feeble signal than conventional detector; Therefore detectivity is strong, and the spectral signal that detects is through digital signal processing output digital signal, can direct machine-readable identification; And can the connection of intelligent microprocessor, realize real objective automatic detection.Therefore, the present invention has improved the performance that spectral signal detects.
Claims (2)
1. a spectral signal detection system comprises the measured material of its irradiation with the generation spectral signal, it is characterized in that, said system also comprises basic frequency laser light source, spectral separation unit, spectrum lock phase probe unit and digital signal processing and output unit;
Said basic frequency laser light source produces the high stable laser radiation to said measured material, inspires spectral signal;
Said spectral separation unit depth compacting basic frequency laser obtains conversion or following conversion spectrum signal;
Said spectrum lock phase probe unit adopts coherent accumulation lock phase integral technology; Last conversion or following conversion spectrum signal are surveyed; Because last conversion or following conversion spectrum signal are the rare earth optical function materials of specific correspondence; It can amplify because of quilt lock phase integral select out, if detect conversion or following conversion spectrum signal, spectrum lock phase probe unit converts this spectral signal into electric signal;
Said digital signal processing and output unit are digital signal and output with electrical signal conversion.
2. an optical spectrum signal detection method is characterized in that, said method comprising the steps of:
A. basic frequency laser light source irradiation measured material produces spectral signal;
B. spectral separation unit depth compacting basic frequency laser obtains conversion or following conversion spectrum signal;
C. spectrum lock phase probe unit adopts coherent accumulation lock phase integral technology; Conversion or following conversion spectrum signal in the detection; Because last conversion or following conversion spectrum signal are the rare earth optical function materials of specific correspondence; It can amplify because of quilt lock phase integral select out, if detect conversion or following conversion spectrum signal, spectrum lock phase probe unit converts this spectral signal into electric signal;
D. electric signal is carried out digital signal processing and output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101419233A CN101477723B (en) | 2008-08-16 | 2008-08-16 | Optical spectrum signal detection method, system and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101419233A CN101477723B (en) | 2008-08-16 | 2008-08-16 | Optical spectrum signal detection method, system and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101477723A CN101477723A (en) | 2009-07-08 |
| CN101477723B true CN101477723B (en) | 2012-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101419233A Expired - Fee Related CN101477723B (en) | 2008-08-16 | 2008-08-16 | Optical spectrum signal detection method, system and device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013113763A1 (en) * | 2012-02-03 | 2013-08-08 | Mei, Inc. | Apparatus and method for characterizing items of currency |
| EP3301655B1 (en) * | 2016-09-30 | 2023-11-15 | CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement | Luminescent security feature |
| CN106680224B (en) * | 2016-12-29 | 2019-03-22 | 清华大学 | Material oxidation ablation measuring device and its measurement method in a kind of high-temperature tunnel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584555A (en) * | 2004-06-01 | 2005-02-23 | 浙江大学 | Petroleum products quality rapid measuring instrument based on low-resolution Raman spectra |
| CN1995979A (en) * | 2006-12-05 | 2007-07-11 | 中国科学院安徽光学精密机械研究所 | Laser breakdown spectrographic detection method and system for metal pollutants in water body |
| CN101004383A (en) * | 2007-01-11 | 2007-07-25 | 山西大学 | Method and device for measuring weak fluorescence spectrum |
| CN101089609A (en) * | 2007-06-28 | 2007-12-19 | 中国科学院安徽光学精密机械研究所 | Multiple spectral section continuous tuning high resolution infrared laser spectral measuring system and method |
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2008
- 2008-08-16 CN CN2008101419233A patent/CN101477723B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584555A (en) * | 2004-06-01 | 2005-02-23 | 浙江大学 | Petroleum products quality rapid measuring instrument based on low-resolution Raman spectra |
| CN1995979A (en) * | 2006-12-05 | 2007-07-11 | 中国科学院安徽光学精密机械研究所 | Laser breakdown spectrographic detection method and system for metal pollutants in water body |
| CN101004383A (en) * | 2007-01-11 | 2007-07-25 | 山西大学 | Method and device for measuring weak fluorescence spectrum |
| CN101089609A (en) * | 2007-06-28 | 2007-12-19 | 中国科学院安徽光学精密机械研究所 | Multiple spectral section continuous tuning high resolution infrared laser spectral measuring system and method |
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| CN101477723A (en) | 2009-07-08 |
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