CN203672774U - Optical fiber probe for salinity measurement and measurement device using same - Google Patents
Optical fiber probe for salinity measurement and measurement device using same Download PDFInfo
- Publication number
- CN203672774U CN203672774U CN201320889872.9U CN201320889872U CN203672774U CN 203672774 U CN203672774 U CN 203672774U CN 201320889872 U CN201320889872 U CN 201320889872U CN 203672774 U CN203672774 U CN 203672774U
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- optical
- probe
- fibre
- fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses an optical fiber probe for salinity measurement and a measurement device using the optical fiber probe. The optical fiber probe for the salinity measurement is characterized by comprising an optical fiber probe needle, wherein the optical fiber probe needle comprises a first optical fiber, a long period grating (LPG), a second optical fiber, a fiber bragg grating (FBG) and a third optical fiber, a metallized reflecting film end formed by a metal reflecting film is plated at one end of the first optical fiber, an optical fiber of the long period grating is loaded at the other end thereof, and the second optical fiber is loaded with the optical fiber of the fiber bragg grating and in sequence connected with the third optical fiber. The optical fiber probe has the advantages of simple overall structure, convenience in manufacturing and low cost of the optical fibers of other parts, and wide application range of environmental temperatures and environmental depths and suitability for mass production; the measurement device using the optical fiber probe is convenient in forming and easy to operate by a user; the measuring device can accurately obtain the salinity, temperature and depth of a water body in a wide range in real time.
Description
Technical field
The utility model relates to a kind of salimity measurement device, especially a kind of fibre-optical probe for salimity measurement and use the measurement mechanism of this fibre-optical probe.
Background technology
As the important parameter of tolerance component target, there are in recent years multiple relevant commercial measurement means in the salinity in water body and food thereupon.Conventional technological means comprises that conductivity surveys salinity, refractive index and survey salinity etc., and corresponding also have portable electric conductance/salinity/temperature measuring set and a portable refractive index/salinity/temperature measuring set.At present, the measuring object of this type of portable salinity measuring instrument is single, in the process of test water salinity, when often cannot realizing the degree of depth of water temperature and water, measures, and the surveying instrument that need to add other carries out additional survey, so increased measurement procedure and the equipment scale of construction.
In recent years, fiber grating is widely used in the numerous areas such as industrial technology field, such as gas-monitoring, bridge stress monitoring, refractometry, chemical constituents determination etc. gradually due to its stable physical property, ripe manufacturing technology and cheap cost of manufacture.Application at present more widely fiber grating mainly contains bragg grating (Fiber Bragg Grating, FBG) and long period fiber grating (Long Period Grating, LPG).Bragg grating is the physical quantity such as monitor temperature, stress, deformation effectively; Long period fiber grating is because transmission film and the claddingmode of its fibre core can be interfered mutually, therefore can measure refractive index in external environment and the variation of chemical composition, and the mesohaline variation of liquid just can make its refractive index value change, therefore be highly suitable for the mesohaline measurement of water body.In prior art, also there is the seawater salinity measuring device based on bragg grating, this seawater salinity measuring device comprises the bragg grating FBG2 that bragg grating FBG1 that covering is intact and covering corrode by hydrofluorite, FBG1 is to responsive to temperature, and be not subject to the impact of extraneous solution variations in refractive index, therefore be used for measuring temperature variation, FBG2 is mainly used to measure solution variations in refractive index; By the demarcation of refractive index and salinity, just can utilize the way of measuring solution refractive index to measure solution salinity.This device that utilizes bragg grating to measure salinity, although sensing arrangement is simple, can realize long distance, distributed measurement, but because the mechanical fiber optic performance after corruption candle reduces greatly, can affect the accuracy of measurement result in the time measuring; In addition, hydrofluorite is a kind of chemicals that Human and nature environment is had to larger harm, and the security requirement that this just must improve operation, makes operating process complicated, has not only reduced production efficiency, has also increased production cost.
In addition, conventional salimity measurement instrument generally all directly detects water body to be measured, this just cannot be avoided the impact of silt in water body, dust, plankton etc., cause detecting that the salinity in Salinity Data and actual seawater or other water body has deviation, so how effectively to get rid of the impact of other environmental factor in water body, just seem extremely important.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of fibre-optical probe for salimity measurement and uses the measurement mechanism of this fibre-optical probe, and this measurement mechanism can be in real time, accurately and detect salinity and the temperature of water body or solution on a large scale.
It is a kind of fibre-optical probe for salimity measurement that the utility model solves the problems of the technologies described above adopted technical scheme, comprise optical fiber probe, described optical fiber probe is by the first optical fiber, long period fiber grating, the second optical fiber, bragg grating and the 3rd optical fiber composition, one end plating of the first described optical fiber is provided with metallic reflective coating and forms plating reflectance coating termination, the other end of the first described optical fiber, be loaded with the optical fiber of described long period fiber grating, the second described optical fiber, the optical fiber that is loaded with described bragg grating is connected successively with the 3rd described optical fiber.
This fibre-optical probe also comprise one can enter water body and can filtering water body in aquatic organism and the encapsulation sleeve pipe of other solid particle polluter, described optical fiber probe is suspended in described encapsulation sleeve pipe, described encapsulation sleeve pipe comprises the transparent tube body of an end opening, with the gland bonnet of center pit, the first isolation aperture plate, on the sidewall of described transparent tube body, be provided with several blastholes, the openend of described gland bonnet and described transparent tube body is tightly connected, the first described isolation aperture plate is coated on described transparent tube body outward and closely covers whole blastholes, the 3rd described optical fiber passes the center pit of described gland bonnet and is connected with described seal cap sealing, the first described optical fiber, be loaded with the optical fiber of described long period fiber grating, the second described optical fiber, the optical fiber and the 3rd described optical fiber of part that are loaded with described bragg grating are positioned at described transparent tube body, and described plating reflectance coating termination does not contact with the inwall of the sealed end of described transparent tube body.Supporting encapsulation sleeve pipe is set; can effectively filter planktonic organism, algae and the gravel class solid particulate matter in water body by the first isolation aperture plate; and can avoid the direct shock of aquatic organism to optical fiber probe; conservation of nature water body and aquatic organism avoid the impact of broken fiber simultaneously, thereby further improve accuracy of detection.
The entire length of described optical fiber probe is 5-10cm, and the length of the first described optical fiber is no more than 5cm, and the length of the second described optical fiber is no more than 5cm.
The aperture of described blasthole is 0.5cm-1.0cm, and the first described isolation aperture plate is that mesh count is greater than 200 object stainless steel aperture plates.
Described transparent tube body is lucite pipe or transparent glass tube.
In the center pit of described gland bonnet, close installation is useful on the stationary installation of fixing the 3rd described optical fiber, on described gland bonnet, be also provided with the vent port with the intracavity inter-connection of described transparent tube body, the aperture of described vent port is 0.1mm-2mm, and the arranged outside of described vent port has the second isolation aperture plate.Stationary installation is also conducive to protect the 3rd optical fiber in fixing the 3rd optical fiber, prevents fracture, and being provided with of vent port is beneficial to transparent tube body inside and outside air pressure balance.
A kind of measurement mechanism that uses the described fibre-optical probe for salimity measurement, comprise amplified spontaneous emission source, fiber spectrometer, optical circulator and fibre-optical probe, described optical circulator has three ports, first port of described optical circulator is connected with the output terminal of described amplified spontaneous emission source, second port of described optical circulator is connected with the 3rd described optical fiber, and the 3rd port of described optical circulator is connected with the input end of described fiber spectrometer.
Second port of described optical circulator is connected with the free end of described the 3rd optical fiber by optical patchcord, and one end that described optical patchcord is connected with second port of described optical circulator is FC optical fiber interface or APC optical fiber interface.One end that optical patchcord is connected with the second port of optical circulator is set to FC optical fiber interface or APC optical fiber interface, is convenient to the quick connection of fibre-optical probe and optical patchcord.
The free end welding of the other end of described optical patchcord and described the 3rd optical fiber, and pad place is provided with the protective device for the protection of the 3rd optical fiber described near part pad and pad and the described optical patchcord of part.
Described protective device comprises protective casing and reinforces metal bar; described protective casing is coated on outside the optical patchcord described in the 3rd optical fiber and the part described near part pad and pad; described reinforcing metal bar is arranged in described protective casing; the same sidewall of the optical patchcord described near the part the 3rd optical fiber described near part pad, pad, pad all fits tightly with described reinforcing metal bar; the length of described reinforcing metal bar is 1.5-2cm, and the diameter of section of described reinforcing metal bar is 1-2mm.
Compared with prior art, the utility model has the advantage of: this fibre-optical probe for salimity measurement comprises optical fiber probe, this optical fiber probe is made up of the first optical fiber, long period fiber grating, the second optical fiber, bragg grating and the 3rd optical fiber, its general structure is simple, easy to make, and the environment temperature that each several part optical fiber in optical fiber probe is cheap, can be applicable and the scope of the environment degree of depth are wider, be applicable to large-scale production and utilization on a large scale; This is used for the fibre-optical probe of salimity measurement and the measurement mechanism that amplified spontaneous emission source, optical circulator, fiber spectrometer form, and composition is convenient, is easy to user of service's operation; According to the susceptibility of long-period grating pair temperature and the bragg grating susceptibility of stress to external world, and miscellaneous part in coupling apparatus can obtain salinity, temperature and the degree of depth of water body in real time, accurately and on a large scale, when test, directly fibre-optical probe is immersed in water body to be measured, operating process is simple, and measuring accuracy is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of optical fiber probe in embodiment;
Fig. 2 is the composition schematic diagram of measurement mechanism in embodiment;
Fig. 3 is the encapsulation schematic diagram one that encapsulates sleeve pipe and optical fiber probe in embodiment;
Fig. 4 is the encapsulation schematic diagram two that encapsulates sleeve pipe and optical fiber probe in embodiment;
Fig. 5 is the Experimental equipment of confirmatory experiment in embodiment;
Fig. 6 a is the variation in four groups of variable concentrations salt solusions of the harmonic peak peak valley of long period fiber grating in the confirmatory experiment of embodiment;
Fig. 6 b is the variation in the salt solusion that in the confirmatory experiment of embodiment, the harmonic peak peak valley of long period fiber grating is 4% in concentration;
Fig. 6 c is the variation in the salt solusion that in the confirmatory experiment of embodiment, the harmonic peak peak valley of bragg grating is 4% in concentration.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
As shown in figures 1 and 3, a kind of fibre-optical probe for salimity measurement, comprise optical fiber probe 1 and one can enter water body and can filtering water body in aquatic organism and the encapsulation sleeve pipe of other solid particle polluter, optical fiber probe 1 is by the first optical fiber 11, long period fiber grating 12, the second optical fiber 13, bragg grating 14 and the 3rd optical fiber 15 form, one end plating of the first optical fiber 11 is provided with metallic reflective coating and forms plating reflectance coating termination 16, the other end of the first optical fiber 11, be loaded with the optical fiber of long period fiber grating 12, the second optical fiber 13, the optical fiber that is loaded with bragg grating 14 is connected successively with the 3rd optical fiber 15.The entire length of optical fiber probe 1 is 5cm, and the length of the first optical fiber 11 is 2cm.At this, the optical fiber that is loaded with long period fiber grating 12 in optical fiber probe 1 be loaded with bragg grating 14 and weld mutually, weld forms the second optical fiber 13, therefore, the length of the second optical fiber 13 decides by being loaded with the optical fiber of long period fiber grating 12 and being loaded with bragg grating 14, in the present embodiment, the length of the second optical fiber 13 is 0.5cm.Encapsulation sleeve pipe comprises the transparent tube body 21 of an end opening, the gland bonnet 22 with center pit, the first isolation aperture plate 23.Gland bonnet 22 is tightly connected with the openend of transparent tube body 21, on the sidewall of transparent tube body 21, be provided with several blasthole (not shown)s, it is outer and closely cover whole blastholes that the first isolation aperture plate 23 is coated on transparent tube body 21, and the aperture of blasthole on the sidewall of transparent tube body 21 is 0.5cm-1.0cm.In the center pit of gland bonnet 22, close installation is useful on the stationary installation of fixing the 3rd optical fiber 15, here stationary installation employing internal diameter is the FC ceramic insertion core 24 of 125 μ m, optical fiber probe 1 passes FC ceramic insertion core 24 rear-suspendings in encapsulation sleeve pipe, wherein the 3rd optical fiber 15 passes FC ceramic insertion core 24 and is tightly connected with gland bonnet 22, the first optical fiber 11, be loaded with the optical fiber of long period fiber grating 12, the second optical fiber 13, the optical fiber and part the 3rd optical fiber 15 that are loaded with bragg grating 14 are positioned at transparent tube body 21, and described metallic reflective coating termination 16 does not contact with the inwall of the sealed end of transparent tube body 21.
In the present embodiment, to adopt mesh count be 250 object stainless steel aperture plates to the first isolation aperture plate 23; Transparent tube body 21 is lucite pipe, can be also transparent glass tube in other concrete practical applications; On gland bonnet 22, be also provided with the vent port 25 with the intracavity inter-connection of transparent tube body 21, the aperture of vent port 25 is 0.1mm-2mm, and the arranged outside of vent port 25 has the second isolation aperture plate (not shown), wherein the second isolation aperture plate is 250 object stainless steel aperture plates with the same mesh count that adopts of the first isolation aperture plate 23.In other concrete practical applications, stationary installation also can adopt homemade fixture closely to fix and protect the 3rd optical fiber 15.
As shown in Figure 2, a kind of measurement mechanism that uses above-mentioned fibre-optical probe, comprise amplified spontaneous emission source 3, fiber spectrometer 4, optical circulator 5 and fibre-optical probe, optical circulator 5 has three ports, first port of optical circulator 5 is connected with the output terminal of amplified spontaneous emission source 3, second port of optical circulator 5 welds mutually by optical patchcord 6 and the free end of the 3rd optical fiber 15, and the 3rd port of optical circulator 5 is connected with the input end of fiber spectrometer 4.At this, amplified spontaneous emission source 3 and optical circulator 5 all adopt prior art, and fiber spectrometer 4 adopts resolution at 0.02nm and the above various fiber spectrometers that are applied to fiber-optic monitoring.Optical patchcord 6 is FC optical fiber interface with one end that second port of optical circulator 5 is connected, the free end welding of the other end of optical patchcord 6 and the 3rd optical fiber 15, and pad place is provided with the protective device for the protection of near the 3rd optical fiber 15 of part pad and pad and part optical patchcord 6, at this, protective device as shown in Figure 3, it comprises rubber protecting jacket pipe 7 and reinforces metal bar 8, rubber protecting jacket pipe 7 is coated on outside near part the 3rd optical fiber 15 and part optical patchcord 6 pad and pad, reinforcing metal bar 8 is arranged in rubber protecting jacket pipe 7, near and part the 3rd optical fiber 15 pad, pad, near the same sidewall of the part optical patchcord 6 pad all fits tightly with reinforcing metal bar 8, the length of reinforcing metal bar 8 is 1.5cm, diameter of section is 1.5mm.
In other practical applications, one end that optical patchcord is connected with second port of optical circulator can be also APC optical fiber interface.In addition; protective device also can adopt the structure providing as Fig. 4; it comprises thermoplastic sleeve pipe 10 and reinforces metal bar 8; thermoplastic sleeve pipe 10 passes the center pit of gland bonnet 22 and is coated on near the optical patchcord 6 pad to being positioned at outside part the 3rd optical fiber 15 of transparent tube body 21; in thermoplastic sleeve pipe 10, be provided with and reinforce metal bar 8; reinforce metal bar 8 and be close to the sidewall of part the 3rd optical fiber 15, the length of reinforcing metal bar 8 is 1.0cm, and diameter of section is 1.5mm.Because thermoplastic sleeve pipe 10 is through the center pit of gland bonnet 22, the stationary installation that therefore can not adopt Fig. 3 to provide, the stationary installation adopting in Fig. 4 comprises fluid sealant 26, fluid sealant 26 is coated in the both ends of the surface of gland bonnet 22 and the junction of thermoplastic sleeve pipe 10, both play fixation, and can guarantee again sealing.
In order to verify feasibility and the accuracy of the fibre-optical probe for salimity measurement that the present embodiment provides and the measurement mechanism that uses this fibre-optical probe, test as follows:
Experimental provision as shown in Figure 5, it comprises clamper 91 and environment holdout device, environment holdout device comprises Water Tank with Temp.-controlled 92, graduated cylinder 93 and lifting table 94, and Water Tank with Temp.-controlled 92 is placed on lifting table 94, and the graduated cylinder 93 that testing liquid is housed is placed in Water Tank with Temp.-controlled 92.When experiment, fibre-optical probe is fixing by clamper 91, and fibre-optical probe is immersed in testing liquid, again by the position of lifting table 94 regulating thermostatic tanks 92 and graduated cylinder 93, the in the situation that fibre-optical probe being remained unchanged substantially in position, insert in testing liquid, guarantee to be packaged with in every group of experiment fibre-optical probe to be immersed in the degree of depth in testing liquid consistent simultaneously.
Experiment one: the salt solusion that is 1%, 2%, 3%, 4% by concentration injects respectively four identical graduated cylinders, and in the case of the temperature of Water Tank with Temp.-controlled is consistent, carry out respectively four groups of experiments.When experiment, open amplified spontaneous emission source and fiber spectrometer, then fibre-optical probe is immersed in respectively successively to concentration and is in 1%, 2%, 3%, 4% salt solusion, now by the variation of the curve of spectrum in fiber spectrometer, can obtain under uniform temp, the variation relation that salinity is corresponding with spectrum, the variation of the harmonic peak peak valley that Fig. 6 a has provided long period fiber grating in above-mentioned four groups of variable concentrations salt solusions.
Experiment two: the temperature of regulating thermostatic tank, the salt solusion that is 4% by concentration heats up respectively 10 ℃, 20 ℃ successively, observe again the variation of the curve of spectrum in fiber spectrometer, can obtain under identical salinity, the variation relation that temperature is corresponding with spectrum, Fig. 6 b has provided the variation in the salt solusion that under different temperatures, the harmonic peak peak valley of long period fiber grating is 4% in concentration, and Fig. 6 c has provided the variation in the salt solusion that under different temperatures, the harmonic peak peak valley of bragg grating is 4% in concentration.
In above-mentioned experiment, from Fig. 6 a, 6b, 6c, variable concentrations, the temperature variation of solution all can be reacted the variation for peak value or the valley of spectrum, wherein in Fig. 6 a to Fig. 6 c peak wavelength to choose mode as follows: bragg grating adopts the centre wavelength of the 3dB spectrum width at the crest place in the spectral line of reflection peak, and long period fiber grating adopts the centre wavelength of the 3dB spectrum width at the trough place in the spectral line of reflection peak.
Because temperature, salinity and spectrum move the following relation that exists: when (1) solution temperature-resistant, the every increase by 0.1% of salinity, refractive index increases by 2 × 10 thereupon
-4; (2) temperature of solution is in the time of 20 ℃ of left and right, 1 ℃ of the every increase of temperature, and refractive index declines 1 × 10 thereupon
-4; Spectrum moves the computing formula changing with salinity: Δ salinity=(α × Δ λ
lPG+ β × Δ λ
fBG× 1 × 10
-4) × 2 × 10
-4, in formula, Δ salinity is salinity changing value, the variation factor that α is long period fiber grating represents the constant that is related to of the wavelength shift of long period fiber grating that uses and refractive index; β is the variation factor of bragg grating, represents the constant that is related to of the wavelength shift of bragg grating that uses and temperature variation; Δ λ
lPGrepresent the optic spectrum line movement value of long period fiber grating, Δ λ
fBGrepresent the optic spectrum line movement value of bragg grating.Therefore, in actual detection, before test or after the optical fiber probe more renewing, need the solution (i.e. the solution of near the known temperature 20 ℃ and salinity) that fibre-optical probe is placed in to demarcation to calibrate, obtain the initial value of temperature, and in fiber spectrometer, obtain respectively the initial spectrum spectral line of long period fiber grating and bragg grating, again fibre-optical probe is put into water body to be measured, from computing machine, analyzing the optic spectrum line that obtains long period fiber grating and bragg grating moves, move by spectrum the actual salinity value that calculates water body to be measured with the computing formula of salinity variation again, actual temperature value in water body to be measured obtains by the amount of movement of optic spectrum line and the relation of temperature of bragg grating, the deviation causing because of temperature variation when measured temperature value feedback compensation is measured salinity.
Because fibre-optical probe comprises bragg grating part, and bragg grating is STRESS VARIATION sensitivity to external world, therefore can be by carry out above-mentioned experiment under different water depth degree, thereby different stress datas and spectroscopic data are demarcated, can, in actual marine environment salinity measurement, the water depth of environment be detected.
Claims (10)
1. the fibre-optical probe for salimity measurement, it is characterized in that comprising optical fiber probe, described optical fiber probe is made up of the first optical fiber, long period fiber grating, the second optical fiber, bragg grating and the 3rd optical fiber, one end plating of the first described optical fiber is provided with metallic reflective coating and forms plating reflectance coating termination, and the other end of the first described optical fiber, the optical fiber that is loaded with described long period fiber grating, described the second optical fiber, the optical fiber that is loaded with described bragg grating are connected successively with the 3rd described optical fiber.
2. the fibre-optical probe for salimity measurement according to claim 1, characterized by further comprising one can enter water body and can filtering water body in aquatic organism and the encapsulation sleeve pipe of other solid particle polluter, described optical fiber probe is suspended in described encapsulation sleeve pipe, described encapsulation sleeve pipe comprises the transparent tube body of an end opening, with the gland bonnet of center pit, the first isolation aperture plate, on the sidewall of described transparent tube body, be provided with several blastholes, the openend of described gland bonnet and described transparent tube body is tightly connected, the first described isolation aperture plate is coated on described transparent tube body outward and closely covers whole blastholes, the 3rd described optical fiber passes the center pit of described gland bonnet and is connected with described seal cap sealing, the first described optical fiber, be loaded with the optical fiber of described long period fiber grating, the second described optical fiber, the optical fiber and the 3rd described optical fiber of part that are loaded with described bragg grating are positioned at described transparent tube body, and described plating reflectance coating termination does not contact with the inwall of the sealed end of described transparent tube body.
3. the fibre-optical probe for salimity measurement according to claim 1 and 2, is characterized in that the entire length of described optical fiber probe is 5-10cm, and the length of the first described optical fiber is no more than 5cm, and the length of the second described optical fiber is no more than 5cm.
4. the fibre-optical probe for salimity measurement according to claim 2, is characterized in that the aperture of described blasthole is 0.5cm-1.0cm, and the first described isolation aperture plate is that mesh count is greater than 200 object stainless steel aperture plates.
5. the fibre-optical probe for salimity measurement according to claim 4, is characterized in that described transparent tube body is lucite pipe or transparent glass tube.
6. the fibre-optical probe for salimity measurement according to claim 5, it is characterized in that the interior close installation of center pit of described gland bonnet is useful on the stationary installation of fixing the 3rd described optical fiber, on described gland bonnet, be also provided with the vent port with the intracavity inter-connection of described transparent tube body, the aperture of described vent port is 0.1mm-2mm, and the arranged outside of described vent port has the second isolation aperture plate.
7. the measurement mechanism of the fibre-optical probe for salimity measurement described in a right to use requirement 1, it is characterized in that comprising amplified spontaneous emission source, fiber spectrometer, optical circulator and fibre-optical probe, described optical circulator has three ports, first port of described optical circulator is connected with the output terminal of described amplified spontaneous emission source, second port of described optical circulator is connected with the 3rd described optical fiber, and the 3rd port of described optical circulator is connected with the input end of described fiber spectrometer.
8. use according to claim 7 is for the measurement mechanism of the fibre-optical probe of salimity measurement, second port that it is characterized in that described optical circulator is connected with the free end of described the 3rd optical fiber by optical patchcord, and one end that described optical patchcord is connected with second port of described optical circulator is FC optical fiber interface or APC optical fiber interface.
9. use according to claim 8 is for the measurement mechanism of the fibre-optical probe of salimity measurement; the free end welding of the other end of the optical patchcord described in it is characterized in that and the 3rd described optical fiber, and pad place is provided with the protective device for the protection of the optical patchcord described in the 3rd optical fiber described near part pad and pad and part.
10. use according to claim 9 is for the measurement mechanism of the fibre-optical probe of salimity measurement, it is characterized in that described protective device comprises protective casing and reinforces metal bar, described protective casing is coated on outside the optical patchcord described in the 3rd optical fiber and the part described near part pad and pad, described reinforcing metal bar is arranged in described protective casing, the 3rd optical fiber described near part pad, pad, the same sidewall of the optical patchcord described near part pad all fits tightly with described reinforcing metal bar, the length of described reinforcing metal bar is 1.5-2cm, the diameter of section of described reinforcing metal bar is 1-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320889872.9U CN203672774U (en) | 2013-12-30 | 2013-12-30 | Optical fiber probe for salinity measurement and measurement device using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320889872.9U CN203672774U (en) | 2013-12-30 | 2013-12-30 | Optical fiber probe for salinity measurement and measurement device using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203672774U true CN203672774U (en) | 2014-06-25 |
Family
ID=50969055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320889872.9U Expired - Fee Related CN203672774U (en) | 2013-12-30 | 2013-12-30 | Optical fiber probe for salinity measurement and measurement device using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203672774U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743675A (en) * | 2013-12-30 | 2014-04-23 | 宁波大学 | Optical fiber detector for measuring salinity and measurement device using optical fiber detector |
| CN110864742A (en) * | 2019-12-02 | 2020-03-06 | 中国人民解放军国防科技大学 | All-fiber temperature and salt depth sensor based on micro-nano fiber coupler interferometer |
-
2013
- 2013-12-30 CN CN201320889872.9U patent/CN203672774U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743675A (en) * | 2013-12-30 | 2014-04-23 | 宁波大学 | Optical fiber detector for measuring salinity and measurement device using optical fiber detector |
| CN103743675B (en) * | 2013-12-30 | 2016-04-27 | 宁波大学 | For salimity measurement fibre-optical probe and use the measurement mechanism of this fibre-optical probe |
| CN110864742A (en) * | 2019-12-02 | 2020-03-06 | 中国人民解放军国防科技大学 | All-fiber temperature and salt depth sensor based on micro-nano fiber coupler interferometer |
| CN110864742B (en) * | 2019-12-02 | 2021-11-12 | 中国人民解放军国防科技大学 | All-fiber temperature and salt depth sensor based on micro-nano fiber coupler interferometer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103743675B (en) | For salimity measurement fibre-optical probe and use the measurement mechanism of this fibre-optical probe | |
| Joe et al. | A review on optical fiber sensors for environmental monitoring | |
| CN104089682B (en) | A kind of liquid level detection device and its detection method | |
| CN203894161U (en) | All-fiber refractometer based on michelson interferometer and system | |
| CN104316106A (en) | Optical fiber sensor based on Mach-Zehnder interference and fiber bragg grating | |
| CN204228235U (en) | Based on the optical fiber continous way liquid level sensor system of CMFTIR effect | |
| CN205449355U (en) | Fiber grating earth pressure sensor | |
| CN203224447U (en) | Refractive rate sensor based on fine-core fiber MZ (Mach-Zehnder) interferometer | |
| CN104897577B (en) | Optical fiber hydrogen detection means based on light heating | |
| CN103900994A (en) | All-fiber refractive index meter based on michelson interferometer, manufacturing method and system | |
| CN110864742B (en) | All-fiber temperature and salt depth sensor based on micro-nano fiber coupler interferometer | |
| Wang et al. | Temperature, stress, refractive index and humidity multi parameter highly integrated optical fiber sensor | |
| CN203657934U (en) | Reflection-type temperature/refractive index two-parameter sensing device employing long-period FBG based on Sagnac ring | |
| CN206862524U (en) | A kind of double measurement sensors based on twin-core fiber | |
| CN203672774U (en) | Optical fiber probe for salinity measurement and measurement device using same | |
| CN102183488B (en) | Refractive index sensor based on blazed long-period fibre grating | |
| CN106442340A (en) | Device and method for detecting seawater salinity based on long period fiber grating | |
| CN102183487B (en) | Manufacturing method of metal film plated double-humped resonance liquid sensor based on SPR (Surface Plasmon Resonance) | |
| CN211234773U (en) | FP chamber temperature sensor based on optic fibre wire jumper | |
| CN102147362B (en) | Temperature self-compensation FBG (Fiber Bragg Grating) refractive index sensor based on conical corrosion | |
| CN110530466B (en) | Intensity modulation type liquid level sensing detection method based on double-coreless optical fiber cascade connection | |
| CN202994328U (en) | Fiber grating sensor | |
| CN102706825B (en) | Method and system for measuring concentration of chemical solution by fiber bragg gratings (FBG) | |
| CN103852190B (en) | A kind of fiber-optic grating sensor of measurement ArF excimer laser cavity temperatures | |
| CN202511919U (en) | Fiber grating array temperature transmitter based on relative strength edge filtering method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140625 Termination date: 20161230 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |