CN100588951C - Dip in bonding type optical fiber liquid analysis method - Google Patents
Dip in bonding type optical fiber liquid analysis method Download PDFInfo
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- CN100588951C CN100588951C CN200810064011A CN200810064011A CN100588951C CN 100588951 C CN100588951 C CN 100588951C CN 200810064011 A CN200810064011 A CN 200810064011A CN 200810064011 A CN200810064011 A CN 200810064011A CN 100588951 C CN100588951 C CN 100588951C
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Abstract
The present invention is to provide a kind of bonding type optical fiber liquid analysis method that dips in.The light of light source output enters incident optical, the output of incident optical enters fibre-optical probe, the reflected light of fibre-optical probe enters reception optical fiber, receive optical fiber and connect signals collecting and treatment circuit through photodetector, signals collecting and treatment circuit connect computing machine, the below of fibre-optical probe is provided with liquid container, fibre-optical probe is installed on the reciprocating mechanism, move upper and lower, back and forth by fibre-optical probe, it is periodically contacted with fixed testing liquid, by means of obtain the testing liquid surface from fibre-optical probe, liquid internal, optical fiber and liquid dip in the reflected light signal on sticking portion and probe residual liquid surface, obtain surface tension of liquid, the coefficient of viscosity, concentration and refractive index characteristic parameter.The present invention has advantages such as making is easier, cleaning is more convenient, signal conformance good, the acquired information amount is many.
Description
(1) technical field
What invention related to is a kind of analytical approach of liquid component.The invention still further relates to the used analytical equipment of a kind of liquid analysis method.Specifically a kind of optical fiber test method and device that adopts optical fiber technology to measure a plurality of physical parameters of liquid simultaneously.
(2) background technology
Along with the continuous enhancing of people's environmental protection and awareness of safety, people are to the control of polluting, have higher requirement to the quality monitoring of diet, medicine and industrial liquid.Because it is little that optical fiber has a volume, electrical isolation and advantage such as corrosion-resistant make based on the liquid measure method development of optical fiber technology rapidly, and at present common have methods such as intensity modulated, surface plasma-wave spectral analysis, Fabry Perot interference.But the common function ratio of these methods is more single, generally can only measure at some physical quantitys.If obtain the multiple physical parameter of same liquid, then needing to use multiple different testing tool measures, so not only the consistance of gained data is bad, and might introduce impurity in the process of measuring a certain parameter, thereby makes follow-up measurement result produce error.
Can realize that at present the simultaneously-measured technology of a plurality of physical quantitys of liquid has only the optical fiber Liquid Drop Analysis Technology.Disclosed both at home and abroad patent has (EP 0 286 419 AZ, EP 0 364 203AI, CN1414392, CN1337572 and CN1337573).The signal of this technology forms device and is based on an optical fiber drop head, and the drop head constitutes by the kapillary that is positioned at the axle center with respect to symmetrical two plastic optical fibers placing of kapillary, and solution feed pump flows to kapillary with fluid to be measured, forms drop at the capillary pipe end.By analyzing through the intensity of the signal of drop reflection and the measurement that the Changing Pattern in cycle is realized liquid.Shortcomings such as this technology is very high to the stability requirement that liquid is supplied with, and has drop header structure complexity, and kapillary cleans difficulty, and liquid head consistance and repeatability are relatively poor.
(3) summary of the invention
The object of the present invention is to provide a kind of easy to operate, signal conformance good, multiple data quantity is gathered simultaneously and analyze dip in bonding type optical fiber liquid analysis method.The present invention also aims to provide the bonding type optical fiber liquid analysis method that dips in that a kind of making is easier, clean more convenient, large information capacity, have good consistance and repeatability.
The object of the present invention is achieved like this:
The bonding type optical fiber liquid analysis method that dips in of the present invention is: by light source, incident optical, fibre-optical probe, receive optical fiber, photodetector, signals collecting and treatment circuit, computing machine and reciprocating mechanism composition analysis device, the light of light source output enters incident optical, the output of incident optical enters fibre-optical probe, the reflected light of fibre-optical probe enters reception optical fiber, receive optical fiber and connect signals collecting and treatment circuit through photodetector, signals collecting and treatment circuit connect computing machine, the below of fibre-optical probe is provided with liquid container, fibre-optical probe is installed on the reciprocating mechanism, move upper and lower, back and forth by fibre-optical probe, it is periodically contacted with fixed testing liquid, by means of obtain the testing liquid surface from fibre-optical probe, liquid internal, optical fiber and liquid dip in the reflected light signal on sticking portion and probe residual liquid surface, obtain surface tension of liquid, the coefficient of viscosity, concentration and refractive index characteristic parameter.
The composition that dips in the special analytical apparatus of bonding type optical fiber liquid analysis method of the present invention comprises light source, incident optical, fibre-optical probe, reception optical fiber, photodetector, signals collecting and treatment circuit, computing machine, reciprocating mechanism.The light of light source output enters incident optical, the output of incident optical enters fibre-optical probe, the reflected light of fibre-optical probe enters reception optical fiber, receive optical fiber and connect signals collecting and treatment circuit through photodetector, signals collecting and treatment circuit connect computing machine, the below of optical fiber detection probe is provided with liquid container, and fibre-optical probe or liquid container are installed on the reciprocating mechanism.
The present invention can also comprise:
1, fibre-optical probe is installed on the reciprocating mechanism, and described reciprocating mechanism is the multidimensional combination displacement platform by Electric Machine Control, by kinetic control system realization cyclical movement up and down reciprocatingly.
2, light source 2, incident optical 3, reception optical fiber 4 and photodetector 7 integrate and constitute light path integrated unit 9.
3, described fibre-optical probe is two fibre-optical probes of being made up of an incident optical and a root receiving fiber.
4, the described pair of fibre-optical probe is incident optical with to receive optical fiber parallel to each other, and incident optical with receive the both sides that optical fiber is arranged in the axle center of popping one's head in symmetrically.
5, described pair of fibre-optical probe is: incident optical is with to receive optical fiber parallel to each other, and incident optical places the axle center of probe, receives optical fiber and is positioned at a side, closely contacts with launching fiber or certain distance arranged.
6, described pair of fibre-optical probe is: incident optical with receive optical fiber and become certain included angle, the span of angle is 0 °＜θ≤175 °.
7, described fibre-optical probe is three fibre-optical probes of being made up of an incident optical and two root receiving fibers.
8, described three fibre-optical probes are: three optical fiber arrangements become positive three-legged structure, and wherein one as incident optical, and other two as receiving optical fiber.
9, described three fibre-optical probes are: three optical fiber arrangements become the isosceles right triangle structure, and an optical fiber on the 45 is incident optical.
10, described three fibre-optical probes are: three optical fiber arrangements are in alignment, and incident optical places the shaft core position of probe.
11, described light source is: according to the susceptibility of liquid to the light of different wave length, can select a plurality of wavelength such as 488nm, 532nm, 633nm, 670nm, 808nm, 980nm, 1064nm, 1310nm, 1550nm.
Light source of the present invention, incident optical, reception optical fiber and photodetector integrate forms the light path integrated unit, does when pumping with respect to fluid to be measured at fibre-optical probe, the signal fluctuation that can avoid the relative motion because of optical fiber itself to bring.
Fibre-optical probe of the present invention can be selected multiple version, adapts to different demands: (1) its structure has two optical fiber, multiple array modes such as three optical fiber; (2) array configuration of optical fiber has the various ways such as angle that have between the parallel and optical fiber of many optical fiber between 0～175 °; (3) shape of optical fiber end also has multiple shapes such as planar end surface, conical end face, multiple edge body awl end face and oblique angle end face; (4) clean easily and thoroughly, can be used for the duplicate measurements of different liquids, can not produce cross pollution.
The optical fiber detection probe is installed in the fibre-optical probe position precise control system of being made up of electric machine controller 15, the automatically controlled combination displacement of multidimensional platform 16 and probe grasping device 17 18.
Fibre-optical probe of the present invention is equipped with the probe positions precise control system, it is made of electric machine controller 15, the automatically controlled combination displacement of multidimensional platform 16 and probe grasping device 17, the probe grasping device is fixed on the automatically controlled combination displacement platform, the three-dimensional that can control fibre-optical probe by computer programming moves and realizes the memory function of probe positions, has improved the stability of system and the repeatability of measurement data.
A kind of fiber liquid sensor that can measure a plurality of physical parameters of liquid simultaneously of the present invention.Its course of work and principle are: precise control system 18 control fibre-optical probes 6 in fibre-optical probe position are done and are pumped, periodically contact with fluid to be measured, the light that light source 2 sends enters fluid to be measured by incident optical 3, and a part of light turns back to and receives optical fiber 4 after liquid effects.In the process of the one-period of fibre-optical probe motion, enter receive optical fiber 4 reflected signal respectively from, testing liquid surface, liquid internal, optical fiber and liquid dip in sticking portion, and the residual liquid surface of popping one's head in.Photodetector 7 is transformed into electric signal with the light signal that receives, give signals collecting and treatment circuit 10 carries out rough handling, utilize 12 pairs of gained signals of computing machine to analyze at last, utilize fibre-optical probe in a period of motion, to collect and come from the different characteristic signals that reflect the position, by comparing, obtain a plurality of physical characteristics parameters such as fluid to be measured refractive index, the coefficient of viscosity, surface tension and concentration with the signal that records in advance and store.This device has simple in structure, and the quantity of information of implication is many, and signal conformance is good, and probe size is little, and advantages such as easy cleaning can be applied in the on-line monitoring in fields such as chemistry, medical and health, beverage production and environment measuring.
The present invention has following advantage:
Do not detect when (1) not needing multiple different testing tool just can realize a plurality of physical quantity to liquid, improved work efficiency, avoided repeatedly measuring the error of being brought because of different instruments.
(2) generating apparatus of test signal is simple, does not need complicated drop head and liquid feed device;
(3) fibre-optical probe is simple in structure, and it is convenient to clean, and has thoroughly solved not easy cleaning of feed flow kapillary, and liquid residue is to analyzing the interference problem that produces;
(4) have the fibre-optical probe of various ways, can select multi-form probe as required in actual applications.
(5) light source has the multi-wavelength and can select, and can select suitable wavelengths to the susceptibility of the light of different wave length according to liquid.
(6) the standard setting is that launching fiber all adopts communicating by letter of standard to use single-mode fiber with receiving optical fiber, does not have the Mode Coupling problem, can the light intensity signal that receive not exerted an influence, and can improve the accuracy of measurement result; The size of fibre-optical probe can be very little, and I is accomplished diameter 250 μ m.
(7) the signal each several part of each physical quantity of sign liquid is independently of one another, and signal analysis process is easy.
(4) description of drawings
Fig. 1 is that the system of of the present invention pair of fibre-optical probe structure constitutes block diagram.
Fig. 2 is that the system of three fibre-optical probe structures of the present invention constitutes block diagram.
Fig. 3, Fig. 4, Fig. 5 are respectively the structural representation of two fibre-optical probes of three kinds of forms.
Fig. 6, Fig. 7, Fig. 8 are respectively the right view of Fig. 3, Fig. 4, Fig. 5.
Fig. 9, Figure 10, Figure 11 are respectively the structural representation of three fibre-optical probes of three kinds of forms.
Figure 12, Figure 13, Figure 14 are respectively the right view of Fig. 9, Figure 10, Figure 11.
Figure 15 is the signal of the different liquids of embodiment one gained.Wherein pecked line is the signal of soybean oil, and broken broken line is the signal of alcohol, and solid line is the signal of distilled water.
(5) embodiment
For example the utility model is done description in more detail below in conjunction with accompanying drawing:
Embodiment one: in conjunction with Fig. 1, the composition that dips in bonding type optical fiber liquid analysis to measure sensor comprises that light source drives 1, light source 2, incident optical 3, receive optical fiber 4, photodetector 7, fibre-optical probe 6, signals collecting and treatment circuit 10 and computing machine 12, light source drives and connects light source, the light of light source output enters incident optical, the output of incident optical enters fibre-optical probe, the reflected light of fibre-optical probe enters reception optical fiber, receive optical fiber and connect signals collecting and treatment circuit through photodetector, signals collecting and treatment circuit connect computing machine, the optical fiber detection probe is installed in by electric machine controller 15, on the probe grasping device of the fibre-optical probe position precise control system 18 that the automatically controlled combination displacement of multidimensional platform 16 and probe grasping device 17 are formed, the below of fibre-optical probe is provided with liquid container 13.Light source 2, incident optical 3, reception optical fiber 4 and photodetector 7 integrate and constitute light path integrated unit 9.Liquid container 13 is fixed on the receptacle fixture 14.In conjunction with Fig. 3-Fig. 8, fibre-optical probe is two fibre-optical probes of being made up of an incident optical and a root receiving fiber, its concrete form can be at following 3 kinds of optional one: (1) incident optical is with to receive optical fiber parallel to each other, and incident optical with receive the both sides that optical fiber is arranged in the axle center of popping one's head in symmetrically.(2) incident optical is with to receive optical fiber parallel to each other, and incident optical places the axle center of probe, receives optical fiber and is positioned at a side, closely contacts with launching fiber or certain distance arranged.Can obtain the different light intensity signal by selecting different distances.(3) incident optical becomes certain included angle with reception optical fiber, and the span of angle is between 0-175 °.Can obtain different light intensity signals by selecting different angles.The control program that utilization is write based on LabVIEW, the automatically controlled combination displacement of control multidimensional platform 16 moves, thereby drive fibre-optical probe and do pumping of turnover fluid to be measured, the light that light source 2 sends enters fluid to be measured by incident optical 3, a part of light turns back to and receives optical fiber 4 after liquid effects, photodetector 7 is transformed into electric signal with the light signal that receives, give signals collecting and treatment circuit 10 carries out rough handling, utilize 12 pairs of gained signals of computing machine to analyze at last, thereby obtain the physical characteristics parameter of fluid to be measured.Figure 15 for actual measurement the signal of different liquids, wherein broken broken line is the signal of soybean oil, pecked line is the signal of sucrose solution, solid line is the signal of distilled water.
Embodiment two: in conjunction with Fig. 9-Figure 14, second kind of embodiment of the present invention comprised that the basic composition of first kind of embodiment, its difference are three fibre-optical probes of its fibre-optical probe for being made up of an incident optical and two root receiving fibers.Its concrete form can be at following 3 kinds of optional one: (1) three optical fiber arrangements becomes positive three-legged structure, and wherein one as incident optical, and other two as receiving optical fiber.(2) three optical fiber arrangements become the isosceles right triangle structure, and an optical fiber on the 45 is incident optical.(3) three optical fiber arrangements are in alignment, and incident optical places the shaft core position of probe.
Claims (1)
1, a kind of bonding type optical fiber liquid analysis method that dips in, it is characterized in that: by light source, incident optical, fibre-optical probe, receive optical fiber, photodetector, signals collecting and treatment circuit, computing machine and reciprocating mechanism composition analysis device, the light of light source output enters incident optical, the output of incident optical enters fibre-optical probe, the reflected light of fibre-optical probe enters reception optical fiber, receive optical fiber and connect signals collecting and treatment circuit through photodetector, signals collecting and treatment circuit connect computing machine, the below of fibre-optical probe is provided with liquid container, fibre-optical probe is installed on the reciprocating mechanism, move upper and lower, back and forth by fibre-optical probe, it is periodically contacted with fixed testing liquid, by means of obtain the testing liquid surface from fibre-optical probe, liquid internal, optical fiber and liquid dip in the reflected light signal on sticking portion and probe residual liquid surface, obtain surface tension of liquid, the coefficient of viscosity, concentration and refractive index characteristic parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810064011A CN100588951C (en) | 2008-02-19 | 2008-02-19 | Dip in bonding type optical fiber liquid analysis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810064011A CN100588951C (en) | 2008-02-19 | 2008-02-19 | Dip in bonding type optical fiber liquid analysis method |
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| Publication Number | Publication Date |
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| CN101251474A CN101251474A (en) | 2008-08-27 |
| CN100588951C true CN100588951C (en) | 2010-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810064011A Expired - Fee Related CN100588951C (en) | 2008-02-19 | 2008-02-19 | Dip in bonding type optical fiber liquid analysis method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424360A (en) * | 2012-05-14 | 2013-12-04 | 陈惠龙 | Substation-centralized-control type optical fiber sensing system for detecting concentration of flammable and explosive gases and hazardous gases |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107356526A (en) * | 2017-06-24 | 2017-11-17 | 中国地质调查局西安地质调查中心 | A kind of external incident reception optical fiber probe apparatus of infrared spectrometer |
| CN108762322B (en) * | 2018-06-05 | 2020-12-08 | 温州派瑞机械科技有限公司 | Domestic self-made drink concentration control device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4946652A (en) * | 1987-12-30 | 1990-08-07 | The Dow Chemical Company | Chemical analysis probe station |
-
2008
- 2008-02-19 CN CN200810064011A patent/CN100588951C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4946652A (en) * | 1987-12-30 | 1990-08-07 | The Dow Chemical Company | Chemical analysis probe station |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424360A (en) * | 2012-05-14 | 2013-12-04 | 陈惠龙 | Substation-centralized-control type optical fiber sensing system for detecting concentration of flammable and explosive gases and hazardous gases |
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| CN101251474A (en) | 2008-08-27 |
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Granted publication date: 20100210 Termination date: 20170219 |