CN203287318U - Optical fiber sensing device of fluorescence method - Google Patents
Optical fiber sensing device of fluorescence method Download PDFInfo
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- CN203287318U CN203287318U CN2013203406338U CN201320340633U CN203287318U CN 203287318 U CN203287318 U CN 203287318U CN 2013203406338 U CN2013203406338 U CN 2013203406338U CN 201320340633 U CN201320340633 U CN 201320340633U CN 203287318 U CN203287318 U CN 203287318U
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- fluorescence
- optical fiber
- photodetector
- transmission fibers
- pass filter
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Abstract
The utility model relates to an optical fiber sensing device of a fluorescence method. The optical fiber sensing device of the fluorescence method comprises an LED light source, a coupling lens, a short-wave pass filter, a transmission optical fiber, a fluorescence sensing material, a first signal optical fiber, a second signal optical fiber, a first photoelectric detector, a second photoelectric detector and a third photoelectric detector. Light emitted by the LED light source is coupled with the input end of the transmission optical fiber through the coupling lens. The short-wave pass filter is arranged between the coupling lens and the transmission optical fiber. The light output by the output end of the transmission optical fiber is cast on the fluorescence sensing material. Emitted fluorescent light is received by the output end of the transmission optical fiber, output by the input end of the optical fiber, reflected by the short-wave pass filter and received by the first photoelectric detector. The first signal optical fiber and the second signal optical fiber receive fluorescence signals of the fluorescence sensing material and output the fluorescence signals to the first photoelectric detector and the second photoelectric detector respectively. Physical or chemical parameters, including concentration, of matter which acts on the fluorescence sensing material can be detected by measuring intensity of the received fluorescence light.
Description
Technical field
The utility model belongs to the photoelectric sensing field, and particularly a kind of the affect effect of different material on fluorescence spectrum of utilizing, and employing optical fiber is realized the fluorescence method fibre-optical sensing device that physics or the chemical property of material are surveyed as the light signal medium.
Background technology
The fluorescence method sensing principle is connecting together with the molecule that can identify some detected parameters the fluorescence inductive material that is formed for sensing by chemical method by fluorescigenic molecule.Usually the fluorescence inductive material is coated on a transparent material, make it produce certain fluorescence with a light source with certain bandwidth through transparent material deexcitation fluorescence inductive material, when detected material is present in detected sample,, by detected material and identification interaction of molecules, cause cancellation or the enhancing of fluorescence.Fluorescence intensity is just relevant with the concentration of measured matter.Just can calculate the content of measured matter by measuring fluorescence intensity.Due to the development of modern optical fiber technology, make the loss of the transmission of light in optical fiber greatly reduce, therefore, adopt optical fiber to come the transmission sensing light signal can realize remote sensing detection.In addition, optical fiber also has volume little, and is lightweight, and light signal is not subjected to electromagnetic interference (EMI), and the advantages such as corrosion-resistant and high temperature, therefore, be specially adapted to the sensing detection in crawl space and rugged surroundings.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of single transmission optical fiber that adopts not only as light source but also as the Transmission Fibers of the fluorescence that is excited, make the simple in structure of sensing equipment, adopt a plurality of fluorescence signals to receive optical fiber, can strengthen the receiving intensity of fluorescence signal, due to the characteristics such as low-loss of optical fiber, the utility model can be realized remote and the sensing detection in harsh and unforgiving environments.
The utility model solves its technical matters and realizes by the following technical solutions:
a kind of fluorescence method Fibre Optical Sensor equipment, comprise LED light source, coupled lens, short wave pass filter, Transmission Fibers, the fluorescence inductive material, first signal optical fiber, secondary signal optical fiber, the first photodetector, the second photodetector, the 3rd photodetector, the light that described LED light source sends is coupled to the input end of described Transmission Fibers by described coupled lens, described short wave pass filter is placed between described coupled lens and described Transmission Fibers, and with the central axis of described coupled lens, become about miter angle, described fluorescence inductive material is placed near the output terminal of described Transmission Fibers, the illumination of at the output terminal of described Transmission Fibers, exporting is mapped on described fluorescence inductive material, the fluorescence that sends is received by the output terminal of described Transmission Fibers, and after the input port output by this optical fiber, reflected by described short wave pass filter, and by described the first photodetector, received, described first signal optical fiber and secondary signal optical fiber are arranged on the position near described Transmission Fibers, its fluorescence input end face is substantially parallel with the output end face of described Transmission Fibers, receive the fluorescence signal of described fluorescence inductive material and output to respectively described the first photodetector and the second photodetector, power by measuring received fluorescence can the material of detection effect on described fluorescence inductive material physics or the chemical parameters such as concentration.
And the centre wavelength of described LED light source is shorter than the wavelength of fluorescence that fluorescence inductive material sends.
And described short wave pass filter has high permeability to the light that described LED light source sends; Described short wave pass filter has high reflectance to the fluorescence that described fluorescence inductive material sends.
And described Transmission Fibers, first signal optical fiber and secondary signal optical fiber are a kind of single mode or multimode optical fiber.
And the fluorescence spectrum that described the first photodetector, described the second photodetector and described the 3rd photodetector and described fluorescence inductive material send has essentially identical spectral range.
Advantage of the present utility model and beneficial effect are:
1. this fluorescence method Fibre Optical Sensor equipment adopts single transmission optical fiber not only as light source but also as the Transmission Fibers of the fluorescence that is excited, make the simple in structure of sensing equipment, adopt a plurality of fluorescence signals to receive optical fiber, can strengthen the receiving intensity of fluorescence signal, due to the characteristics such as low-loss of optical fiber, the utility model can be realized remote and the sensing detection in harsh and unforgiving environments.
2. this fluorescence method Fibre Optical Sensor equipment, simple for structure, and size is little, and is reasonable in design, and cost is low.
Description of drawings
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is the output spectrum schematic diagram of LED light source;
Fig. 3 is the fluorescence spectrum schematic diagram that the fluorescence inductive material sends;
Fig. 4 is the transmitted spectrum schematic diagram of short wave pass filter.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, following examples are descriptive, are not determinate, can not limit protection domain of the present utility model with this.
Fig. 1 is a schematic diagram of the present utility model, the light beam 4 that LED light source 2 sends is focused on by coupled lens 6, see through short wave-pass filter 10, be coupled in the input port 12 of Transmission Fibers 14, and shine on fluorescence inductive material 18 after output port 16 outputs of Transmission Fibers 12, the fluorescence that fluorescence inductive material 18 produces is a kind of light of dispersing, the output port 16 that its part reflected fluorescent light is transmitted optical fiber 12 receives, and, by port one 2 outputs, received by photodetector 22 after short wave-pass filter 10 reflections.First signal optical fiber 24 and secondary signal optical fiber 32 are arranged on the position near Transmission Fibers 14, its fluorescence input end face 26 and 34 substantially parallel with the output end face 16 of Transmission Fibers 14, receive the fluorescence signal of fluorescence inductive material 18 and output to respectively the first photodetector 24 and the second photodetector 38.Transmission Fibers 14, first signal optical fiber 24 and secondary signal optical fiber 32 can adopt multimode or single-mode fiber as required.Generally, short wave-pass filter 10 is arranged to the axis of coupled lens 6, become about miter angle.The fluorescent light beam of sending from port one 2 is a kind of light of dispersing, after short wave-pass filter 10 reflections, fluorescent light beam 20 is also a kind of light of dispersing, therefore, the receiving area of photodetector 22 and photodetector 22 all can affect the fluorescence intensity that photodetector 22 receives with the distance of short wave-pass filter 10, should photodetector 22 be placed on the position near short wave-pass filter 10 as far as possible, and the photodetector that the selective reception Area comparison is large, be conducive to strengthen the fluorescence intensity that receives.Equally, the light of the output port 28 of first signal optical fiber 24 and secondary signal optical fiber 32 and 36 outputs is also dispersed, should photodetector 30 and 38 be placed on the position near port 28 and 38 as far as possible, and the large photodetector 30 and 38 of selective reception Area comparison, will be conducive to strengthen the fluorescence signal intensity that receives.Can with the output port 28 of first signal optical fiber 24 and secondary signal optical fiber 32 and 36 the configuration optical fiber collimators make output light be collimated light beam, photodetector 30 and 38 can be placed on from output port 28 and 36 distant positions like this.After the output port 28 of first signal optical fiber 24 and secondary signal optical fiber 32 and 36 output ports can being bundled, adopt a photodetector to detect fluorescence signal, relatively the great talent is feasible so often to need the receiving area of photodetector.Quantity and the corresponding photodetector quantity that can also increase signal optical fibre increase the intensity that detects fluorescence signal.
Fig. 2 is that a centre wavelength is l
p, the half width of spectrum is Dl
pThe spectrum schematic diagram of LED light source 2. general, the output spectrum of LED light source is much wider than the output spectrum of semiconductor laser, the half width Dl of spectrum
pCan be from several nanometers to tens nanometers, the angle of divergence of output is also very large, must with coupled lens could be effectively with the light beam coupling of LED light source in optical fiber.Fig. 3 is the fluorescence spectrum schematic diagram that adopts in the fluorescence method sensing equipment. for different fluorescence inductive materials, the half width Dl of fluorescence spectrum
fBe tens scopes to the hundreds of nanometer, centre wavelength
l
fCentre wavelength l than the light source that is used for fluorescence excitation
pLong tens to the hundreds of nanometer.Fig. 4 is the transmitted spectrum schematic diagram of short wave pass filter 10.The function of short wave pass filter 10 will make light beam 8 all to see through exactly, and makes the fluorescent light beam of being sent by port one 2 all to reflect.
In actual applications, due to the optical insertion loss of optical filter 10 own, the light and the reflected light that see through through optical filter 10 all can have some losses.In addition, optical filter 10 itself has the gradient of a wavelength variations from the full impregnated to the total reflection, and the width of the spectral width of light source 2 and fluorescence spectrum, part fluorescence may see through filter plate, the light of part light source 2 may be reflected, the several factors that should consider when these are actual design optical filter 10.In addition, the fluorescence spectrum that sends of photodetector 22,30 and 38 fluorescence inductive materials 18 should have essentially identical spectral range.
Innovative point of the present utility model is: this fluorescence method Fibre Optical Sensor equipment adopts single transmission optical fiber not only as light source but also as the Transmission Fibers of the fluorescence that is excited, make the simple in structure of sensing equipment, adopt a plurality of fluorescence signals to receive optical fiber, can strengthen the receiving intensity of fluorescence signal, due to the characteristics such as low-loss of optical fiber, the utility model can be realized remote and the sensing detection in harsh and unforgiving environments.
Claims (5)
1. fluorescence method Fibre Optical Sensor equipment, comprise LED light source, coupled lens, short wave pass filter, Transmission Fibers, the fluorescence inductive material, first signal optical fiber, secondary signal optical fiber, the first photodetector, the second photodetector, the 3rd photodetector, the light that described LED light source sends is coupled to the input end of described Transmission Fibers by described coupled lens, described short wave pass filter is placed between described coupled lens and described Transmission Fibers, and with the central axis of described coupled lens, become about miter angle, described fluorescence inductive material is placed near the output terminal of described Transmission Fibers, the illumination of at the output terminal of described Transmission Fibers, exporting is mapped on described fluorescence inductive material, the fluorescence that sends is received by the output terminal of described Transmission Fibers, and after the input port output by this optical fiber, reflected by described short wave pass filter, and by described the first photodetector, received, described first signal optical fiber and secondary signal optical fiber are arranged on the position near described Transmission Fibers, its fluorescence input end face is substantially parallel with the output end face of described Transmission Fibers, receive the fluorescence signal of described fluorescence inductive material and output to respectively described the first photodetector and the second photodetector, power by measuring received fluorescence can the material of detection effect on described fluorescence inductive material physics or the chemical parameters such as concentration.
2. a kind of fluorescence method Fibre Optical Sensor equipment according to claim 1, it is characterized in that: the centre wavelength of described LED light source is shorter than the wavelength of fluorescence that fluorescence inductive material sends.
3. a kind of fluorescence method Fibre Optical Sensor equipment according to claim 1, it is characterized in that: described short wave pass filter has high permeability to the light that described LED light source sends; Described short wave pass filter has high reflectance to the fluorescence that described fluorescence inductive material sends.
4. a kind of fluorescence method Fibre Optical Sensor equipment according to claim 1, it is characterized in that: described Transmission Fibers, first signal optical fiber and secondary signal optical fiber are a kind of single mode or multimode optical fiber.
5. a kind of fluorescence method Fibre Optical Sensor equipment according to claim 1, it is characterized in that: the fluorescence spectrum that described the first photodetector, described the second photodetector and described the 3rd photodetector and described fluorescence inductive material send has essentially identical spectral range.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203406338U CN203287318U (en) | 2013-06-14 | 2013-06-14 | Optical fiber sensing device of fluorescence method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013203406338U CN203287318U (en) | 2013-06-14 | 2013-06-14 | Optical fiber sensing device of fluorescence method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237179A (en) * | 2013-06-14 | 2014-12-24 | 天津奇谱光电技术有限公司 | Optical fiber sensing equipment by fluorescence method |
| CN109946045A (en) * | 2019-04-11 | 2019-06-28 | 南京东奇艾尼特科技有限公司 | A kind of chemical fibre thickness detection system and detection method based on Fibre Optical Sensor |
-
2013
- 2013-06-14 CN CN2013203406338U patent/CN203287318U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237179A (en) * | 2013-06-14 | 2014-12-24 | 天津奇谱光电技术有限公司 | Optical fiber sensing equipment by fluorescence method |
| CN109946045A (en) * | 2019-04-11 | 2019-06-28 | 南京东奇艾尼特科技有限公司 | A kind of chemical fibre thickness detection system and detection method based on Fibre Optical Sensor |
| CN109946045B (en) * | 2019-04-11 | 2024-01-26 | 南京东奇艾尼特科技有限公司 | Chemical fiber thickness detection system and detection method based on optical fiber sensing |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20170614 |
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| CF01 | Termination of patent right due to non-payment of annual fee |