CN205483422U - Oil leak detection device based on fiber grating - Google Patents
Oil leak detection device based on fiber grating Download PDFInfo
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- CN205483422U CN205483422U CN201620082958.4U CN201620082958U CN205483422U CN 205483422 U CN205483422 U CN 205483422U CN 201620082958 U CN201620082958 U CN 201620082958U CN 205483422 U CN205483422 U CN 205483422U
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Abstract
The utility model relates to a fiber bragg grating sensor ware field provides an oil leak detection device based on fiber grating, including fiber grating measuring transducer, compensation sensor, the multichannel wavelength demodulation appearance the same with the fiber grating measuring transducer structure, fiber grating measuring transducer includes and the basement that becomes with perfluor ether rubber is equipped with an optic fibre in, equidistantly on the optic fibre arranges a plurality of grating sensor, and the substrate surface is equipped with the sinusoidal wave mode recess that is used for fixed sensing element, the sensitive material of sensing element for meeting the oil swell, its shape be sinusoidal wave mode, and sensing element every crest and trough be corresponding grating sensor respectively, fiber grating measuring transducer, compensation sensor all link to each other with fiber grating demodulation appearance, and fiber grating demodulation appearance links to each other with the host computer. The utility model is suitable for an oil leak of coupling department detects, its simple structure, and convenient to use, small, the precision is high.
Description
Technical field
This utility model relates to fiber-optic grating sensor field, a kind of leakage detection device based on fiber grating, it is adaptable to the Oil Leakage Detecting at pipe joint.
Background technology
The detection method of at present leakage of oil probably can be divided into following a few class: 1. by detecting the pressure of oil container, the index of leakage of oil using the change of oil pressure as whether；2. changed by its resistance after special conductive yarn meets oil, check whether leakage of oil by the change of detection resistance；3. after oil met by special material, its color detects whether leakage of oil by the way of changing；4. by being collected in catcher by oil, the thin film in catcher causes the resistance variations of foil gauge because of the gravity deformation of oil, detects whether leakage of oil by measuring resistance variations；5. utilize optical element to carry out Oil Leakage Detecting by ocular estimate；6. carry out image detection etc. by CDD sensor.
Although existing detection method is more, but all there are some problems, as: by detection pressure can not detect the most small leakage of oil, the meeting detected by resistance variations is by the electromagnetic interference of surrounding, and electric current may cause potential safety hazard simultaneously, can not realize monitoring in real time by observational method detection, by the way of collecting leakage of oil and causing thin film modification, volume is relatively big, and the rolling simultaneously not adapting to the measurement when compound movement, such as aircraft makes catcher possibly cannot collect leakage of oil.
Summary of the invention
The purpose of this utility model is contemplated to overcome above-mentioned weak point of the prior art, it is provided that a kind of leakage detection device based on fiber grating, it is adaptable to the Oil Leakage Detecting at pipe joint, its simple in construction, and easy to use, volume is little, and precision is high.
The purpose of this utility model is achieved by the following technical measures: a kind of leakage detection device based on fiber grating, sensor is measured including fiber grating, the compensation sensor that sensor construction is identical is measured with fiber grating, multi-channel wavelength (FBG) demodulator, described fiber grating measures the substrate that sensor includes making with perfluoroelastomers, an optical fiber it is provided with in substrate, multiple grating sensor it is equally spaced on optical fiber, substrate surface is provided with the sinusoidal waveform groove for fixing sensing element, described sensing element is the sensitive material meeting oil swell, it is shaped as sinusoidal waveform, each crest of sensing element and the most corresponding grating sensor of trough, described fiber grating measures sensor, compensate sensor to be all connected with fiber Bragg grating (FBG) demodulator, fiber Bragg grating (FBG) demodulator is connected with host computer.
In technique scheme, described fiber grating measures the adhesive tape type structure that sensor is wide 40 to 50mm.
In technique scheme, between two grating sensors of described fiber grating measurement sensor, it is spaced 30 to 50mm.
In technique scheme, described sensing element uses silica gel to make.
This utility model leakage detection device based on fiber grating compared with prior art has the advantage that
(1) use the swellability of special material as Cleaning Principle, can preferably detect a small amount of leakage of oil of pipe joint, there is not electricity simultaneously and directly contact with oil, reduce by electrometric potential safety hazard.
(2) employing fiber grating can eliminate the interference to measuring of the electromagnetism in environment as sensing element, reduces potential safety hazard without electric energy, and fiber grating pair dependent variable sensitivity can reach to measure the requirement of small strain simultaneously.
(3) using the measurement system of compensation way, that can reduce other environment parameter changes the impact on measurement result.
(4) use the structure that sensing element is interchangeable, improve the utilization rate of grating and silica gel substrate, reduce the use cost of sensor.
(5) mounting means of adhesive tape type is used to make the layout of detection device convenient.
Accompanying drawing explanation
Fig. 1 is system schematic of the present utility model.
Fig. 2 is the structural representation of the base part that fiber grating measures sensor in this utility model.
Fig. 3 is the structural representation of the sensing element that fiber grating measures sensor in this utility model.
Fig. 4 is utility model works flow chart.
Wherein: 1. substrate, 2. grating sensor, 3. optical fiber, 4. sensing element.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical scheme in this utility model is clearly and completely described.
nullSuch as Fig. 1、2、Shown in 3，The present embodiment provides a kind of leakage detection device based on fiber grating，Sensor is measured including fiber grating、Sensor construction identical compensation sensor is measured with fiber grating、Multi-channel wavelength (FBG) demodulator，Described fiber grating measures the substrate 1 that sensor includes making with perfluoroelastomers，An optical fiber 3 it is provided with in substrate 1，Multiple grating sensor 2 it is equally spaced on optical fiber 3，When making substrate 1, fiber grating is distributed into wherein，Formed by mould compression moulding，Substrate 1 surface is provided with the sinusoidal waveform groove for fixing sensing element 4，Described sensing element 4 is the sensitive material meeting oil swell，It is shaped as sinusoidal waveform，Each crest of sensing element 4 and the most corresponding grating sensor 2 of trough，Described fiber grating measures sensor、Compensate sensor to be all connected with multi-channel wavelength (FBG) demodulator，Multi-channel wavelength (FBG) demodulator is connected with host computer.
In the above-described embodiments, described fiber grating measures the adhesive tape type structure that sensor is wide about 50mm.
In the above-described embodiments, being spaced about 50mm between two grating sensors 2 of described fiber grating measurement sensor, multiple measuring points are distributed in silica gel substrate 1, for detecting the expansion change of sensing element 4.
In the above-described embodiments, it is band-shaped that described sensing element 4 selects silica gel to make S, and bandwidth about 15mm, when running into oil, its volume expands.
During use, fiber grating is measured sensor as adhesive tape around oil connection, it is made to wrap pipe joint, and have certain tension force, fiber grating is made to measure sensor and pipe joint fixation, substrate is fully contacted with pipe joint, and totally locates fixed compensation sensor in the same way at not oil-containing.Such as Fig. 4, can expand after oil met by sensing element, make the shape of the substrate of flexibility become big, optical fiber is elongated diametrically, and the wavelength of grating sensor radiation changes；Multi-channel wavelength (FBG) demodulator detection fiber grating measuring sensor and compensate the wavelength of sensor and send in host computer；Wavelength data is processed by computer, the most just the wavelength data of two sensors is carried out record, and using this wavelength as initial wavelength, the wavelength data with the wavelength data compensating sensor, fiber grating being measured sensor measurement subsequently compensates, whether the offset data after detection compensates again exceedes certain limit value, if beyond limit value, then it is assumed that there is leakage of oil.
The content not being described in detail in this specification, belongs to prior art known to those skilled in the art.
Claims (4)
1. a leakage detection device based on fiber grating, it is characterized in that: include that fiber grating measures sensor, the compensation sensor that sensor construction is identical is measured with fiber grating, multi-channel wavelength (FBG) demodulator, described fiber grating measures the substrate that sensor includes making with perfluoroelastomers, an optical fiber it is provided with in substrate, multiple grating sensor it is equally spaced on optical fiber, substrate surface is provided with the sinusoidal waveform groove for fixing sensing element, described sensing element is the sensitive material meeting oil swell, it is shaped as sinusoidal waveform, each crest of sensing element and the most corresponding grating sensor of trough, described fiber grating measures sensor, compensate sensor to be all connected with multi-channel wavelength (FBG) demodulator, multi-channel wavelength (FBG) demodulator is connected with host computer.
Leakage detection device based on fiber grating the most according to claim 1, is characterized in that: described fiber grating measures the adhesive tape type structure that sensor is wide 40 to 50mm.
Leakage detection device based on fiber grating the most according to claim 1, is characterized in that: be spaced 30 to 50mm between two grating sensors of described fiber grating measurement sensor.
Leakage detection device based on fiber grating the most according to claim 1, is characterized in that: described sensing element uses silica gel to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620082958.4U CN205483422U (en) | 2016-01-28 | 2016-01-28 | Oil leak detection device based on fiber grating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620082958.4U CN205483422U (en) | 2016-01-28 | 2016-01-28 | Oil leak detection device based on fiber grating |
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| CN205483422U true CN205483422U (en) | 2016-08-17 |
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| CN201620082958.4U Active CN205483422U (en) | 2016-01-28 | 2016-01-28 | Oil leak detection device based on fiber grating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917784A (en) * | 2017-11-16 | 2018-04-17 | 武汉理工大学 | A kind of pipeline road Oil Leakage Detecting system and its method of work based on fiber grating |
| CN110243544A (en) * | 2019-07-02 | 2019-09-17 | 中国飞机强度研究所 | A kind of gas leak detection device, system and method |
-
2016
- 2016-01-28 CN CN201620082958.4U patent/CN205483422U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917784A (en) * | 2017-11-16 | 2018-04-17 | 武汉理工大学 | A kind of pipeline road Oil Leakage Detecting system and its method of work based on fiber grating |
| CN107917784B (en) * | 2017-11-16 | 2019-10-29 | 武汉理工大学 | A kind of pipeline road Oil Leakage Detecting system and its working method based on fiber grating |
| CN110243544A (en) * | 2019-07-02 | 2019-09-17 | 中国飞机强度研究所 | A kind of gas leak detection device, system and method |
| CN110243544B (en) * | 2019-07-02 | 2021-10-01 | 中国飞机强度研究所 | Air leakage detection device, system and method |
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