CN106840012A - A kind of strengthen the hair powder charge II interface strain measuring methods based on grating sensing technique - Google Patents
A kind of strengthen the hair powder charge II interface strain measuring methods based on grating sensing technique Download PDFInfo
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- CN106840012A CN106840012A CN201510886471.1A CN201510886471A CN106840012A CN 106840012 A CN106840012 A CN 106840012A CN 201510886471 A CN201510886471 A CN 201510886471A CN 106840012 A CN106840012 A CN 106840012A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object
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Abstract
The invention provides a kind of strengthen the hair powder charge II interface strain measuring methods based on grating sensing technique, including：Optical fiber Bragg grating sensor is preset at II interfaces, hot environment is born at the II interfaces in process, and the optical fiber Bragg grating sensor is directly contacted with the full surface of material at the II interfaces；The monitoring point input optical wavelength and reflecting light wavelength difference for calculating optical fiber Bragg grating sensor acquisition are worth to II interface strains.The present invention can be applied in the measurement of solid engines II interface strains fiber Bragg sensing technology, and can realize long-term, global II interface strains measurement, to solve the problems, such as current solid engines II bonding interfaces strain quantitative measurment.
Description
Technical field
The present invention relates to solid engines interface strain fields of measurement, and in particular to it is a kind of it is based on FBG Sensing Technology, can bear long-time hot environment and for a long time the gluing environment of strength, the method that is applied to the measurement of solid engines II interface strains.
Background technology
Solid engines are the core apparatus of guided missile, and solid engines II interfaces are the transition zones of adhesion heat insulation layer and powder column, and the transition region thickness is thin（The II interfacial thicknesses of the current strain measurement method application are less than or equal to 1mm）, it is ensured that its adhesive strength is always the difficult point of solid engines reliability, and the stress-strain measurement of the transition zone is bottleneck.
At present, although CT scan can obtain interfacial detachment whether picture directly perceived, cannot observation interface stress and development trend.Additionally, CT scan can only qualitatively judge the unsticking at interface, it is impossible to enough quantitative monitorings.At aspects such as highway, bridges, optical fiber Bragg raster application tends to ripe, but in the II interface strain fields of measurement of solid engines, application field also very novel, operation difficulty is very big.
The content of the invention
It is an object of the invention to provide a kind of strengthen the hair powder charge II interface strain measuring methods based on grating sensing technique, fiber Bragg sensing technology can be applied in the measurement of solid engines II interface strains, and long-term, global II interface strains measurement can be realized, to solve the problems, such as current solid engines II bonding interfaces strain quantitative measurment.
To solve the above problems, the present invention provides a kind of strengthen the hair powder charge II interface strain measuring methods based on grating sensing technique, and without electrostatic, the II interface strains measuring method includes measurement process whole process：
Optical fiber Bragg grating sensor is preset at II interfaces, hot environment is born at the II interfaces in process, and the optical fiber Bragg grating sensor is directly contacted with the full surface of material at the II interfaces；
The monitoring point input optical wavelength and reflecting light wavelength difference for calculating optical fiber Bragg grating sensor acquisition are worth to II interface strains.
Further, in the above method, the monitoring point input optical wavelength and reflecting light wavelength difference for calculating optical fiber Bragg grating sensor acquisition are worth to II interface strains, including：
According to the demand for II interface datas, the measurement II bonding interface strains of single-point monitoring point, networking measurement II bonding interface strains.
Further, in the above method, the monitoring point input optical wavelength and reflecting light wavelength difference for calculating optical fiber Bragg grating sensor acquisition are worth to II interface strains, including：
The engineering of demand according to to(for) II interface datas, optimization monitoring point layout, the strain value of measurement core region-of-interest.
Further, in the above method, the monitoring point input optical wavelength and reflecting light wavelength difference for calculating optical fiber Bragg grating sensor acquisition are worth to II interface strains, including：
Reagent is bonded using solid engines II interfaces itself and imbeds sensor and Transmission Fibers, without the outside adhesives of intervention, it is ensured that the uniformity and integrality of II boundary materials.
Further, in the above method, the long-term measurement and measurement in real time of II bonding interfaces strain are realized.
Compared with prior art, the invention has the advantages that：
（1）Strain measurement method is applied to hot environment, different humidity environment and the gluing environment of II interfaces manufacture, and can measure in real time for a long time；
（2）Measurement hardware system is succinct, light, simple to operate, whole without electrostatic with laser as data sensor and transmitting medium；
（3）The sensor and conduction optical fiber volume at interface are imbedded in grade, influence is nearly free from II bonding interface sizes；
（4）Embedment sensor and Transmission Fibers are bonded reagent using solid engines II interfaces itself, without the outside adhesives of intervention, it is ensured that the integrality of II bonding interface materials；
（5）Strain measurement method can networking measurement, at II interfaces diverse location set data collection point, measure synchronization diverse location strain level, realize the global measuring of interface strain.
Brief description of the drawings
Fig. 1 is the solid engines powder charge heat insulation layer bonding interface strain measurement hardware chart of one embodiment of the invention;
The interface strain measurement scheme that Fig. 2 is arranged for the networking of one embodiment of the invention;
2, the solid engines II interfaces strain curve that Fig. 3 is gathered for the interface strain measuring method of one embodiment of the invention.
Specific embodiment
To enable the above objects, features and advantages of the present invention more obvious understandable, the present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
As shown in figure 1, the present invention provide it is a kind of it is based on FBG Sensing Technology, suitable for solid engines powder charge thermal insulation bed boundary（II interfaces）Be bonded the method for strain measurement, including hardware and equipment be solid engines, optical fiber Bragg grating sensor, data transmission fiber, collection main frame and other aids etc., methods described includes：
Step S1, optical fiber Bragg grating sensor is preset（Flush type）At II interfaces, hot environment is born in process in the II interfaces, and the optical fiber Bragg grating sensor is directly contacted with the full surface of material at the II interfaces, the optical fiber Bragg grating sensor is needed to possess good chemical compatibility, preferably, in order to adapt to the use environment of above-mentioned harshness, the optical fiber Bragg grating sensor can adapt to the hot environment and gluing environment of interface manufacturing process by intensive treatment；And, the appearance and size of the optical fiber Bragg grating sensor after intensive treatment is almost unchanged；
Step S2, the monitoring point input optical wavelength and reflecting light wavelength difference for calculating optical fiber Bragg grating sensor acquisition is worth to II interface strains.Present invention measurement is whole to be strained by optical medium sensing conduction interfaces, is produced without electrostatic, it is ensured that process of the test personnel and equipment it is safe and reliable.
Preferably, the monitoring point input optical wavelength and reflecting light wavelength difference for calculating optical fiber Bragg grating sensor acquisition are worth to II interface strains, including：
According to the demand for II interface datas, single monitoring point measurement II bonding interface strains, or planned network monitoring point, the global strain level at measurement II interfaces and distribution, or optimization monitoring point layout, obtain the strain value of core region-of-interest.The present invention is that fiber Bragg sensing technology extends in the expansion in solid engines II interface level measurements field and application,Realize solid engines II interface strains without electrostatic measurement,Telemeasurement,Measurement in real time and long-term measurement,The present invention is resistant to 200 DEG C of environment temperatures,Adapt to the hot environment of II interfaces manufacture,Adapt to the gluing environment at II interfaces,Applicable II interfacial thicknesses are less than or equal to 1mm,The present invention being capable of spot measurement II interface strains,Also can make up strain measurement network,Global measuring solid engines II interface strains are distributed and level,Can optimization measurement network topology,Give top priority to what is the most important the strain measurement of region-of-interest,In addition,The present invention is bonded reagent and imbeds sensor and Transmission Fibers using solid engines II interfaces itself,Without the outside adhesives of intervention,Ensure that the uniformity and integrality of II boundary materials.
As depicted in figs. 1 and 2, solid engines II interface strains measuring method contains solid engines, the strain transducer for being measured（The round dot 11 seen in Fig. 2）, Transmission Fibers and laser controlling acquisition process instrument（Collection main frame）.
After sensor and conduction optical fiber embedment II interfaces, conduction optical fiber connection is gathered into main frame, collection main frame is to sensor emission Single wavelength light wave, there is elongation after force acting on transducer or shorten, so that there is corresponding change in reflecting light wavelength, two differences of wavelength are asked for by collection main frame, and counts intrinsic parameters, obtain the strain value of measuring point.
Solid engines pour medicine complete deliver to the heat preservation solidification stage after, begin to the measurement work of II interface strains.According to design requirement, can spot measurement II interface strains, also can networking measurement II interface strains, be illustrated in figure 2 and be evenly arranged measuring point, it is also possible to by empirical region of stress concentration refine measuring point position.Fig. 3 is the strain curve of II interfaces two of which measuring point a certain period.
The solid engines powder charge heat insulation layer bonding interface strain measurement hardware chart that Fig. 1 is provided for the present invention.Fig. 2 is the interface strain measurement scheme of networking arrangement, for convenience, amendment and enhanced processing has been done to sensor profile etc., and round dot 11 is measurement point.Fig. 3 is 2, the solid engines II interfaces strain curve of interface strain measuring method collection.
In sum, the invention has the advantages that：
（1）Strain measurement method is applied to the hot environment and gluing environment of the manufacture of II interfaces, and can measure in real time for a long time；
（2）Measurement hardware system is succinct, light, simple to operate, whole without electrostatic with laser as data sensor and transmitting medium；
（3）The sensor and conduction optical fiber volume at interface are imbedded in grade, influence is nearly free from II bonding interface sizes；
（4）Embedment sensor and Transmission Fibers are bonded reagent using solid engines II interfaces itself, without the outside adhesives of intervention, it is ensured that the integrality of II bonding interface materials；
（5）Strain measurement method can networking measurement, at II interfaces diverse location set data collection point, measure synchronization diverse location strain level, realize the global measuring of interface strain.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is the difference with other embodiment, between each embodiment identical similar portion mutually referring to.
Obviously, those skilled in the art can carry out various changes and modification to invention without departing from the spirit and scope of the present invention.So, if these modifications of the invention and modification belong within the scope of the claims in the present invention and its equivalent technologies, then the present invention is also intended to including including these changes and modification.
Claims (5)
1. a kind of strengthen the hair powder charge II interface strain measuring methods based on grating sensing technique, it is characterised in that without electrostatic, the II interface strains measuring method includes measurement process whole process：
Optical fiber Bragg grating sensor is preset at II interfaces, hot environment is born at the II interfaces in process, and the optical fiber Bragg grating sensor is directly contacted with the full surface of material at the II interfaces；
The monitoring point input optical wavelength and reflecting light wavelength difference for calculating optical fiber Bragg grating sensor acquisition are worth to II interface strains；.
2. the strengthen the hair powder charge II interface strain measuring methods of grating sensing technique are based on as claimed in claim 1, it is characterised in that the monitoring point input optical wavelength and reflecting light wavelength difference for calculating optical fiber Bragg grating sensor acquisition are worth to II interface strains, including：
According to the demand for II interface datas, the measurement II bonding interface strains of single-point monitoring point, the measurement II bonding interface strains of network monitoring point.
3. the strengthen the hair powder charge II interface strain measuring methods of grating sensing technique are based on as claimed in claim 1, it is characterised in that the monitoring point input optical wavelength and reflecting light wavelength difference for calculating optical fiber Bragg grating sensor acquisition are worth to II interface strains, including：
The engineering of demand according to to(for) II interface datas, optimization monitoring point layout, the strain value of measurement core region-of-interest.
4. the strengthen the hair powder charge II interface strain measuring methods of grating sensing technique are based on as claimed in claim 1, it is characterised in that the monitoring point input optical wavelength and reflecting light wavelength difference for calculating optical fiber Bragg grating sensor acquisition are worth to II interface strains, including：
Reagent is bonded using solid engines II interfaces itself imbed sensor and Transmission Fibers.
5. strengthen the hair powder charge II interface strain measuring methods based on grating sensing technique as described in any one of Claims 1-4, it is characterised in that realize the long-term measurement and measurement in real time of II bonding interfaces strain.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10801833B2 (en) | 2018-04-09 | 2020-10-13 | The Boeing Company | Strain sensitive surfaces for aircraft structural analysis and health monitoring |
| CN111779593A (en) * | 2020-06-09 | 2020-10-16 | 湖北航天技术研究院总体设计所 | Solid rocket engine shell, solid rocket engine and manufacturing method thereof |
| CN112033894A (en) * | 2019-06-04 | 2020-12-04 | 北京天骥空间科技有限公司 | Interface debonding detection test device based on FBG optical fiber sensing |
| CN112082937A (en) * | 2019-06-13 | 2020-12-15 | 北京天骥空间科技有限公司 | Interface debonding detection method based on FBG optical fiber sensing |
| CN114018435A (en) * | 2021-09-18 | 2022-02-08 | 湖北三江航天红峰控制有限公司 | Solid rocket engine propellant debonding detection device and detection method |
| CN114018434A (en) * | 2021-09-18 | 2022-02-08 | 湖北三江航天红峰控制有限公司 | Detection device and detection method for solid rocket engine interface bonding glue solution |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10801833B2 (en) | 2018-04-09 | 2020-10-13 | The Boeing Company | Strain sensitive surfaces for aircraft structural analysis and health monitoring |
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| CN111779593A (en) * | 2020-06-09 | 2020-10-16 | 湖北航天技术研究院总体设计所 | Solid rocket engine shell, solid rocket engine and manufacturing method thereof |
| CN111779593B (en) * | 2020-06-09 | 2021-09-07 | 湖北航天技术研究院总体设计所 | Solid rocket engine shell, solid rocket engine and manufacturing method thereof |
| CN114018435A (en) * | 2021-09-18 | 2022-02-08 | 湖北三江航天红峰控制有限公司 | Solid rocket engine propellant debonding detection device and detection method |
| CN114018434A (en) * | 2021-09-18 | 2022-02-08 | 湖北三江航天红峰控制有限公司 | Detection device and detection method for solid rocket engine interface bonding glue solution |
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