CN101482519A - Detection apparatus for phase foreign body in fluid - Google Patents
Detection apparatus for phase foreign body in fluid Download PDFInfo
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- CN101482519A CN101482519A CNA2009100960734A CN200910096073A CN101482519A CN 101482519 A CN101482519 A CN 101482519A CN A2009100960734 A CNA2009100960734 A CN A2009100960734A CN 200910096073 A CN200910096073 A CN 200910096073A CN 101482519 A CN101482519 A CN 101482519A
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- 238000000034 method Methods 0.000 claims abstract description 15
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- 238000012360 testing method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
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- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
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- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The invention relates to a phase foreign-matter detection device in liquid. The existing technique is easily subjected to the external interference, has low signal-noise ratio and sensitivity and complicated system constitutes. Using a phase contrast technique and light-signal modulation technique, the emergent light-beam of a light-source module is modulated by a signal generator and then processed by a light-beam shaping device, fluid to be tested, a phase contrast imaging object-lens module and a photo detector array; the modulated light-beam permeation signal acquired by the photo detector array is demodulates by a signal demodulator and the information of the presence of the phase foreign-matter is detected. The phase foreign-matter detection device has features of high sensitivity and signal-to-noise ratio, high stability, strong anti-interference capability, simple and reasonable structure, low mechanical location requirement.
Description
Technical field
The invention belongs to optical technical field, relate to a kind of detection device for foreign matter, detection apparatus for phase foreign body in particularly a kind of fluid.Be mainly used in the foreign matter detection of the fluid products such as medicine, transfusion, oral liquid, beverage in medicine and the beverage industry.
Technical background
Detection device for foreign matter is meant in productions such as medicine, beverage and quality inspection process, the device that fluid products such as transparent or semitransparent medicine, infusion bottle, oral liquid are carried out quality testing.Foreign matter in the bottled fluid product detects whether contain the various materials that are insoluble to fluid, for example glass fragment, solid impurity etc. in the main test fluid.Along with the day by day attention of people to medicine and food quality, and country's perfect to medicine and food control system, standard and flow process, the requisite testing process of foreign matter detection day by day becoming in the fluid products such as medicine, beverage.At present, in production such as medicine, beverage and the quality inspection real process, adopt artificial lamp detection method usually, promptly shine under the condition at certain lamp, the testing staff directly observes bottled fluid product with human eye, checks in the fluid product whether contain foreign matter, and contains foreign matter size, quantity etc.The method man power and material's input amount is big, and monitoring efficient and automaticity are low, and examination criteria is difficult to control adjustment.
The automatic foreign body checking machine that formerly also has a kind of dual signal reception in the technology is (referring to utility model patent " automatic foreign body checking machine that dual signal receives ", utility model patent number: ZL200720074851.6), be disposed with the luminotron assembly on the light path in this device, light emission collecting lens, the light-receiving collecting lens, the imaging mirror, spectroscope, and the diaphragm and the optical receiving sensor array that are provided with on two beam split light paths, utilize that diaphragm raising system gets signal to noise ratio (S/N ratio) and sensitivity in the light path, this device has certain advantage, but still exist not enough: utilize diaphragm raising system to get signal to noise ratio (S/N ratio) and sensitivity, it is limited that signal to noise ratio (S/N ratio) and sensitivity improve degree; The optical receiving sensor array also can receive external interference light in the system in received signal light, promptly produces and measures noise, is subjected to external interference bigger, and influence detects stability; Optical system constitutes complicated, and mechanical positioning requires the degree height, simultaneously, is difficult to detect the light transmission features foreign matter similar to fluid of living in, i.e. phase foreign body.
Summary of the invention
The objective of the invention is to deficiency, detection apparatus for phase foreign body in a kind of fluid is provided, have that sensitivity and signal to noise ratio (S/N ratio) height, antijamming capability are strong, a phase foreign body detection efficiency height, characteristics such as simple and reasonable at above-mentioned technology formerly.
Basic design of the present invention is: utilize phase-contrast technique and light signal modulation-demodulation technique, after the light source assembly outgoing beam is modulated by signal generator, through beam shaping device, detected bottled fluid product, phase contrast imaging objective lens unit, photodetector array, the modulated beam of light that demodulator of PM signal PM collects photodetector array sees through signal and carries out the signal demodulation, obtains the information that detected bottled fluid product contains foreign matter.
Technical solution of the present invention is: comprise light source assembly, beam shaping device, phase contrast imaging objective lens unit, photodetector array, signal generator, demodulator of PM signal PM; Beam shaping device, phase contrast imaging objective lens unit, photodetector array are successively set on the light source assembly outgoing beam light path, and detected bottled fluid product is arranged on the light path between beam shaping device and the phase contrast imaging objective lens unit; Photodetector array is arranged on the picture plane of phase contrast imaging objective lens unit; Light source assembly all is connected with signal generator with demodulator of PM signal PM; Demodulator of PM signal PM is connected with photodetector array.
Described light source assembly is a kind of of incoherent light source component, coherent source assembly, incoherent light source array, coherent source array, optical fiber source.
Described beam shaping device is a kind of of beam expander device, beam collimation device, beam collimation reshaper, beam expander reshaper.
Described phase contrast imaging objective lens unit is a kind of of phase contrast achromatic objective, phase contrast apochromatic objective, phase contrast flat field image-forming objective lens, phase contrast polarized light image-forming objective lens.
Described photodetector array is a kind of of photosensitive tube array, photodiode array, linear charge-coupled array, surface array charge-coupled device, linear array complementary metal-oxide-semiconductor transistor, face battle array complementary metal-oxide-semiconductor transistor, optics microchannel plate.
Described signal generator is a kind of of analog signal generator, digital signal generator, mixed type signal generator.
Described demodulator of PM signal PM is a kind of of analog signal demodulator, digital signal demodulator, software signal demodulation process module.
The course of work of apparatus of the present invention is: the light source assembly outgoing beam carries out the shaping collimation through the beam shaping device; Signal generator is connected with light source assembly, the emission modulated drive signal is given light source assembly, the light source assembly outgoing beam is modulated, modulating frequency is avoided external interference light beats frequency and mains supply frequency, external interference light beats frequency is generally low frequency, less than 100Hz, selective light source component frequency modulating signal is 500Hz in the present embodiment; Through the detected bottled fluid product of modulated beam of light directive behind the shaping collimation, collected by the phase contrast imaging objective lens unit through the transmission modulated beam of light of detected bottled fluid product, image on the photodetector array; The phase contrast imaging objective lens unit has been realized the conversion of the phase information of phase foreign body to amplitude information; Photodetector array is arranged on the picture plane of detected bottled fluid product through the imaging of phase contrast imaging objective lens unit, and the signal that photodetector array detects is that the modulated beam of light of detected bottled fluid product sees through signal; Photodetector array is connected with demodulator of PM signal PM, and detected bottled fluid product light modulated electrical information is transferred to demodulator of PM signal PM, and the synchronous signal generator is connected with demodulator of PM signal PM, and reference signal transmission is used for the signal demodulation to demodulator of PM signal PM; Demodulator of PM signal PM carries out the signal demodulation with the modulated beam of light of the detected bottled fluid product that photodetector array collects through signal, detecting frequency modulating signal is the signal of 500Hz, obtain the light transmission signal of detected bottled fluid product, the light transmission signal just can obtain the information such as foreign matter size, quantity, distribution in the detected bottled fluid product by analysis.
The present invention has the following advantages and effect: compared with prior art, owing to adopted modulation of source and photodetector array modulation signal analytical technology, improved sensitivity and signal to noise ratio (S/N ratio) that foreign matter detects; Suppress external interference light to the influence that device detects from principle, provide device to detect stability; And have characteristics such as system design is reasonable, simple in structure, the required expense of realization is low, the mechanical positioning requirement is low, use operation facility; Adopted phase-contrast technique can test fluid in phase foreign body, monitoring efficient and highly sensitive.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with embodiment, and following examples are explanation of the invention, be reasonable application form of the present invention, and the present invention is not limited to following examples.
As Fig. 1, detection apparatus for phase foreign body comprises light source assembly 1, beam shaping device 2, phase contrast imaging objective lens unit 4, photodetector array 5, signal generator 6, demodulator of PM signal PM 7 in a kind of fluid; Beam shaping device 2, phase contrast imaging objective lens unit 4, photodetector array 5 be successively on the light source assembly 1 outgoing beam light path, and detected bottled fluid product is arranged on the light path between beam shaping device 2 and the phase contrast imaging objective lens unit 4; Photodetector array 5 is arranged on the picture plane of phase contrast imaging objective lens unit 4; Light source assembly 1 all is connected with signal generator 6 with demodulator of PM signal PM 7; Demodulator of PM signal PM 7 is connected with photodetector array 5.
Light source assembly 1 adopts the incoherent light source array, beam shaping device 2 is the beam collimation reshaper, phase contrast imaging objective lens unit 4 adopts phase contrast flat field image-forming objective lens, photodetector array 5 is a photodiode array, signal generator 6 adopts analog signal generator, demodulator of PM signal PM 7 adopts analog signal demodulator, and detected bottled fluid product 3 is the transparent medicine of injection, and phase foreign body is a glass foreign.
The embodiment of the invention course of work is that light source assembly 1 outgoing beam carries out the shaping collimation through beam shaping device 2; Signal generator 6 is connected with light source assembly 1, the emission modulated drive signal is given light source assembly 1, light source assembly 1 outgoing beam is modulated, modulating frequency is avoided external interference light beats frequency and mains supply frequency, external interference light beats frequency is generally low frequency, less than 100Hz, selective light source component 1 frequency modulating signal is 500Hz in the present embodiment; Through the detected bottled fluid product 3 of modulated beam of light directive behind the shaping collimation, collected by phase contrast imaging objective lens unit 4 through the transmission modulated beam of light of detected bottled fluid product 3, image on the photodetector array 5; The phase contrast imaging objective lens unit has been realized the conversion of the phase information of phase foreign body to amplitude information; Photodetector array 5 is arranged on the picture plane of detected bottled fluid product 3 through 4 imagings of phase contrast imaging objective lens unit, and the signal that photodetector array 5 detects is that the modulated beam of light of detected bottled fluid product 3 sees through signal.
The invention provides a kind of detection apparatus for phase foreign body in fluid, utilize phase-contrast technique and modulation Demodulation techniques have realized that successfully the phase foreign body in the fluid product detects, the sensitivity that foreign matter detects With the signal to noise ratio height, discharged the impact that external interference light detects device, detect good stability; With The time have reasonable in design, simple in structure, realize that low, the mechanical positioning requirements of required expense is low, use The characteristics such as operation facility.
Claims (7)
1, detection apparatus for phase foreign body in a kind of fluid, comprise light source assembly, beam shaping device, phase contrast imaging objective lens unit, photodetector array, signal generator, demodulator of PM signal PM, it is characterized in that: beam shaping device, phase contrast imaging objective lens unit, photodetector array are successively set on the light source assembly outgoing beam light path, and detected bottled fluid product is arranged on the light path between beam shaping device and the phase contrast imaging objective lens unit; Photodetector array is arranged on the picture plane of phase contrast imaging objective lens unit; Light source assembly all is connected with signal generator with demodulator of PM signal PM; Demodulator of PM signal PM is connected with photodetector array.
2, detection apparatus for phase foreign body in a kind of fluid as claimed in claim 1 is characterized in that: described light source assembly is a kind of of incoherent light source component, coherent source assembly, incoherent light source array, coherent source array, optical fiber source.
3, detection apparatus for phase foreign body in a kind of fluid as claimed in claim 1 is characterized in that: described beam shaping device is a kind of of beam expander device, beam collimation device, beam collimation reshaper, beam expander reshaper.
4, detection apparatus for phase foreign body in a kind of fluid as claimed in claim 1 is characterized in that: described phase contrast imaging objective lens unit is a kind of of phase contrast achromatic objective, phase contrast apochromatic objective, phase contrast flat field image-forming objective lens, phase contrast polarized light image-forming objective lens.
5, detection apparatus for phase foreign body in a kind of fluid as claimed in claim 1 is characterized in that: described photodetector array is a kind of of photosensitive tube array, photodiode array, linear charge-coupled array, surface array charge-coupled device, linear array complementary metal-oxide-semiconductor transistor, face battle array complementary metal-oxide-semiconductor transistor, optics microchannel plate.
6, detection apparatus for phase foreign body in a kind of fluid as claimed in claim 1 is characterized in that: described signal generator is a kind of of analog signal generator, digital signal generator, mixed type signal generator.
7, detection apparatus for phase foreign body in a kind of fluid as claimed in claim 1 is characterized in that: described demodulator of PM signal PM is a kind of of analog signal demodulator, digital signal demodulator, software signal demodulation process module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910096073 CN101482519B (en) | 2009-02-09 | 2009-02-09 | Detection apparatus for phase foreign body in fluid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910096073 CN101482519B (en) | 2009-02-09 | 2009-02-09 | Detection apparatus for phase foreign body in fluid |
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| CN101482519A true CN101482519A (en) | 2009-07-15 |
| CN101482519B CN101482519B (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910096073 Expired - Fee Related CN101482519B (en) | 2009-02-09 | 2009-02-09 | Detection apparatus for phase foreign body in fluid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102782477A (en) * | 2010-03-02 | 2012-11-14 | 皇家飞利浦电子股份有限公司 | Optical examinations with controlled input light |
| CN106198399A (en) * | 2016-08-17 | 2016-12-07 | 远方谱色科技有限公司 | A kind of intelligibility measure device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4598682B2 (en) * | 2006-01-23 | 2010-12-15 | 株式会社日立ハイテクノロジーズ | Automatic analyzer |
| CN101131368B (en) * | 2007-09-20 | 2010-05-19 | 上海市激光技术研究所 | Automatic foreign body checking machine with double-photo signal receiving sensor array structure |
-
2009
- 2009-02-09 CN CN 200910096073 patent/CN101482519B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102782477A (en) * | 2010-03-02 | 2012-11-14 | 皇家飞利浦电子股份有限公司 | Optical examinations with controlled input light |
| CN106198399A (en) * | 2016-08-17 | 2016-12-07 | 远方谱色科技有限公司 | A kind of intelligibility measure device |
| CN106198399B (en) * | 2016-08-17 | 2023-10-27 | 远方谱色科技有限公司 | Definition measuring device |
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| CN101482519B (en) | 2013-05-08 |
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Owner name: ZHEJIANG INST. OF SCIENCE + TECHNOLOGY Free format text: FORMER OWNER: JIANG HUIZHONG Effective date: 20130516 |
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Free format text: CORRECT: ADDRESS; FROM: 310018 HANGZHOU, ZHEJIANG PROVINCE TO: 310023 HANGZHOU, ZHEJIANG PROVINCE |
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Effective date of registration: 20130516 Address after: 310023 Zhejiang University of Science and Technology, Hangzhou, Zhejiang Road, No. 318 Patentee after: Zhejiang University of Science and Technology Address before: 310018 School of electrical engineering, Zhejiang University of Science and Technology, No. 318 stay Road, Hangzhou, Zhejiang Patentee before: Jiang Huizhong |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20130508 Termination date: 20180209 |