CN108759701A - Optical fiber vibratory string combines and the adjustable surface-mount type sensor of initial value - Google Patents
Optical fiber vibratory string combines and the adjustable surface-mount type sensor of initial value Download PDFInfo
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- CN108759701A CN108759701A CN201810411783.0A CN201810411783A CN108759701A CN 108759701 A CN108759701 A CN 108759701A CN 201810411783 A CN201810411783 A CN 201810411783A CN 108759701 A CN108759701 A CN 108759701A
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- sleeve
- elastic element
- optical fiber
- grating
- vibratory string
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
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- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Abstract
The invention discloses the combination of optical fiber vibratory string and the adjustable surface-mount type sensors of initial value, including：Outer sleeve；A pair of of erection support；Elastic element, left sleeve and right sleeve are fixed with elastic element；Small sleeve is set in elastic element, and one end of small sleeve is pierced by the first preformed hole and welds therewith, and the other end of small sleeve is pierced by opening, is not contacted with small sleeve；Vibratory string and a pair of of clamping element, vibratory string pass through small sleeve, both ends to be clamped by a pair of of clamping element, and a pair of of clamping element is inserted into left sensor terminal and right sensor terminal respectively；Magnetic induction ring is fixed on small sleeve, and the signal of magnetic induction ring is exported from cable, and cable is pierced by elastic element and the outside positioned at outer sleeve；Grating and temperature-compensating grating are strained, strain grating is pasted on the medial surface of elastic element, and temperature-compensating grating is pasted on the outer surface of small sleeve.The present invention can accurately measure the concrete structure, steel construction and other low-elasticity-modulus structures of low-elasticity-modulus amount.
Description
Technical field
The present invention relates to measuring device fields.It is more particularly related to a kind of optical fiber vibratory string combination and initial value
Adjustable surface-mount type sensor.
Background technology
Currently, the surface-mount type forms of sensor of measurement structure strain is various, resistance-type, type vibration wire and optical fiber light common are
Grating, performance are based on respective principle, respectively have quality, wherein vibrating string type sensor is easy to measure, of low cost, in the presence of a harsh environment
It is hardly damaged, grating sensor dynamic property is preferable, and it is accurate to measure, and can creep be small, and anti-fatigue life is long, so if comprehensive
The advantages of closing various aspects invents a kind of knockdown sensor, accomplishes to maximize favourable factors and minimize unfavourable ones with practical significance.
For the surface-mount type sensor of long gauge length, it is accurate to accomplish to measure, and institute will first accomplish the efficient of strain transmission, in the past
Technology be to be screwed to push down sensor terminal with screw, using the frictional force fastened sensors of screw-tipped and cross cut end (of a beam),
The disadvantage is that contact surface, which can be based on various factors, occurs small sliding, to cause strain to lose, so to avoid as possible frictionally
Power installs sensor, invents a kind of novel mounting means, has realistic meaning.
For long gauge length surface-mount type grating sensor, elastomer and bonding method are the key factors for determining its performance
One of, it is zigzag to have a kind of common elastomer at present, but requirement on machining accuracy is high, and processing is inconvenient.
So studying, a kind of combination of optical fiber vibratory string, initial value is adjustable, and surface-mount type sensor has its practical significance.
Invention content
The object of the present invention is to provide the combination of optical fiber vibratory string and the adjustable surface-mount type sensors of initial value, can accurately measure low
Play concrete structure, steel construction and other low-elasticity-modulus structures of modulus.
In order to realize these purposes and other advantages according to the present invention, provides the combination of optical fiber vibratory string and initial value is adjustable
Surface-mount type sensor, including：
Outer sleeve is made of left sleeve and right sleeve, and the right end of the left end of the left sleeve and right sleeve passes through respectively
Left sensor terminal and right sensor terminal block；
A pair of of erection support, is located at the both ends of outer sleeve, and respectively with the left sensor terminal and right sensing
Device end is fixed；
Elastic element is hollow cylindrical structure, the side of left sleeve is provided with the first preformed hole, court
The side of sleeve is provided with opening to the right, and the left sleeve and the right sleeve are fixed with the elastic element；
Small sleeve is set in the elastic element, and one end of the small sleeve is pierced by first preformed hole simultaneously
It welds therewith, the other end of the small sleeve is pierced by the opening, is not contacted with the small sleeve；
Vibratory string and a pair of of clamping element, the vibratory string pass through the small sleeve, both ends to be clamped by a pair of of clamping element, a pair of
Clamping element is inserted into left sensor terminal and right sensor terminal respectively；
Magnetic induction ring is wrapped on small sleeve by epoxy resin layer, and is not covered the both ends of the small sleeve,
The signal of the magnetic induction ring is exported from cable, and the cable is pierced by the elastic element and the outside positioned at outer sleeve；
Grating and temperature-compensating grating are strained, the strain grating is pasted on the medial surface of the elastic element, the temperature
Degree null grating is pasted on the outer surface of small sleeve, and the tail optical fiber of the strain grating and temperature-compensating grating is pierced by the elasticity member
Part and the outside for being located at outer sleeve.
Preferably, erection support includes pedestal and a pair of of otic placode；A pair of of otic placode is set to along the axially spaced-apart of outer sleeve
On the pedestal, U-shaped card mouth is offered on the otic placode, and bayonet both sides are provided with screw hole；
The middle part that the left sensor terminal and right sensor terminal penetrate erection support extends outside to form fixation
Part；
Wherein, fastening bolt penetrates screw hole and fixes the left sensor terminal and right sensor terminal from both sides.
Preferably, the tail optical fiber for straining grating and temperature-compensating grating penetrates the cable and is pierced by the elasticity member together
Part.
Preferably, the elastic element is made of steel alloy, wall thickness 0.5mm.
Preferably, further include capping, cover at the outside of the elastic element, elastic element is sealed with external
It closes.
Preferably, a diameter of 7-9mm of the outer sleeve, a diameter of 2-3mm of the small sleeve.
The present invention includes at least following advantageous effect：
1, optical fiber type and vibrating string type sensor combination, can integrate respective advantage, and data can mutually compare when measurement, fill
Distribution waves vibrating string type sensor and is easy to measure, of low cost, is hardly damaged in the presence of a harsh environment, grating sensor dynamic property
Preferably, it is accurate to measure, and creep is small, the advantage of anti-fatigue life length.
2, the conventional thought for transmitting strain by frictional force is abandoned, is flated pass using micro screw water and passs strain, ensures strain
It is small to transmit loss.
3, vibratory string original frequency and grating initial wavelength can flexibly, be freely adjusted, strain testing range is increased.
4, elastomer is a thin wall circular, and elasticity is big, and the full surface mount of grating is easy to batch finishing in circle ring inner surface
Work.
5, what is taken is cascaded fiber grating temperature self-compensation technology, and inner sleeve one end is completely free, is not influenced by stress variation,
It is only affected by temperature, temperature-compensating can be fully achieved, and structural manufacturing process is simple, it is of low cost.
In addition the sensor have the characteristics that easy for installation, dismounting is simple and fast, it is repeatable be used in turn, not only meet
In steel construction, concrete structure, it can also meet the measurement of other low-elasticity-modulus structures.
Part is illustrated to embody by further advantage, target and the feature of the present invention by following, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Description of the drawings
Fig. 1 is the main view of optical fiber vibratory string combination according to an embodiment of the invention and the adjustable surface-mount type sensor of initial value
Figure；
Fig. 2 is the vertical view of optical fiber vibratory string combination according to an embodiment of the invention and the adjustable surface-mount type sensor of initial value
Figure；
Fig. 3 is the schematic diagram of erection support；
Fig. 4 is the schematic diagram of otic placode；
Fig. 5 is using the optical fiber vibratory string combination of the embodiment of the present application 1 and the adjustable surface-mount type sensor of initial value and market purchase
Vibrating wire sensor detection strain loss；
The sensor schematic of Fig. 6 comparative examples 1.
Description of the drawings
1- erection supports, 2- fixing pieces, 3- clamping elements, 4- vibratory strings, 5- outer sleeves, 6- small sleeves, the first bolts of 7-, 8- envelopes
Lid, 9- elastic elements, 10- strain gratings, 11- temperature-compensating gratings, 12- magnetic induction rings, 13- cables, 14- fastening bolts,
111- tail optical fibers, the left sensor terminals of 201-, the right sensor terminals of 202-.
Specific implementation mode
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art with reference to specification text
Word can be implemented according to this.
In the description of the present invention, term " transverse direction ", " longitudinal direction ", "upper", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is orientation based on ... shown in the drawings or position
Relationship is set, is merely for convenience of description of the present invention and simplification of the description, is not that device or the element of instruction or hint meaning are necessary
With specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
As shown in figures 1-4, the combination of optical fiber vibratory string 4 and the adjustable surface-mount type sensor of initial value, including：
Outer sleeve 5 is made of left sleeve and right sleeve, and the right end of the left end of the left sleeve and right sleeve passes through respectively
Left sensor terminal 201 and right sensor terminal 202 block；Left sensor terminal 201 and right sensor terminal 202 with it is described outer
Sleeve 5 is fixed by laser welding.
A pair of of erection support 1, is located at the both ends of outer sleeve 5, and respectively with the left sensor terminal 201 and the right side
Sensor terminal 202 is fixed；
Elastic element 9 is hollow cylindrical structure, the side of left sleeve is provided with the first preformed hole,
The side of right sleeve is provided with opening, the left sleeve and the right sleeve are solid with 9 laser welding of the elastic element
It is fixed；
Small sleeve 6 is set in the elastic element 9, and one end of the small sleeve 6 is pierced by first preformed hole
And weld therewith, the other end of the small sleeve 6 is pierced by the opening, is not contacted with the small sleeve 6；Realize small sleeve
6 one end are completely free, do not influenced by stress variation, to only be influenced by temperature, then pass through the realization of temperature-compensating grating 11
Temperature-compensating, it is simple in structure, it is of low cost.
Vibratory string 4 and a pair of of clamping element 3, the vibratory string 4 pass through the small sleeve 6, both ends to be pressed from both sides by a pair of of clamping element 3
Tightly, a pair of of clamping element 3 is inserted into left sensor terminal 201 and right sensor terminal 202 respectively, and vibratory string 4 penetrates pre- among clamping element
Behind the perforation duct stayed, fastening nail is penetrated on the outside of clamping element and squeezes to clamp vibratory string by the opposite both sides of clamping element.
Magnetic induction ring 12 is wrapped on small sleeve 6 by epoxy resin layer, and is not covered the small sleeve 6
The signal at both ends, the magnetic induction ring 12 is exported from cable 13, and the cable 13 is pierced by the elastic element 9 and is located at outer sleeve
5 outside；
Grating 10 and temperature-compensating grating 11 are strained, the strain grating 10 is pasted on the medial surface of the elastic element 9,
The temperature-compensating grating 11 is pasted on the outer surface of small sleeve 6, the tail optical fiber of the strain grating 10 and temperature-compensating grating 11
111 are pierced by the elastic element 9 and the outside positioned at outer sleeve 5.
In the above-mentioned technical solutions, 4 formula sensor combinations of optical fiber type and vibratory string, data can mutually compare when measurement, fully
4 formula sensor of vibratory string is played to be easy to measure, it is of low cost, it is hardly damaged in the presence of a harsh environment, grating sensor dynamic property
Preferably, it is accurate to measure, and creep is small, and anti-fatigue life is long.
In another technical solution, erection support 1 includes pedestal and a pair of of otic placode；Axis of a pair of of otic placode along outer sleeve 5
To being arranged at intervals on the pedestal, U-shaped card mouth is offered on the otic placode, and bayonet both sides are provided with screw hole；
The middle part that the left sensor terminal 201 and right sensor terminal 202 penetrate erection support 1 extends outside shape
At fixing piece 2；
Wherein, fastening bolt 14 penetrates screw hole and consolidates the left sensor terminal 201 and right sensor terminal 202 from both sides
It is fixed.
In the above-mentioned technical solutions, the conventional thought for transmitting strain by frictional force is abandoned, is flated pass using micro screw water
Strain is passed, ensures that strain transmission loss is small, improves the accuracy of measurement.
In another technical solution, the tail optical fiber 111 for straining grating 10 and temperature-compensating grating 11 penetrates the cable 13
And it is pierced by the elastic element 9 together.
In another technical solution, the elastic element 9 is made of steel alloy, wall thickness 0.5mm, using alloy
Steel, elasticity is big, and strain grating 10 is pasted on 9 inner surface of elastic element, easy for installation, is easy batch production, while also ensureing
Measurement accuracy.
Further include capping 8 in another technical solution, cover at the outside of the elastic element 9, and passes through first
Bolt 7 is fixed, by elastic element 9 and outer closures.
In another technical solution, a diameter of 7-9mm of the outer sleeve 5, a diameter of 2-3mm of the small sleeve 6.
Embodiment 1
As shown in figures 1-4, the combination of optical fiber vibratory string 4 and the adjustable surface-mount type sensor of initial value, including：
Outer sleeve 5 is made of left sleeve and right sleeve, and the right end of the left end of the left sleeve and right sleeve passes through respectively
Left sensor terminal 201 and right sensor terminal 202 block；Left sensor terminal 201 and right sensor terminal 202 with it is described outer
Sleeve 5 is fixed by laser welding.
A pair of of erection support 1, is located at the both ends of outer sleeve 5, and respectively with the left sensor terminal 201 and the right side
Sensor terminal 202 is fixed；
Elastic element 9 is hollow cylindrical structure, the side of left sleeve is provided with the first preformed hole,
The side of right sleeve is provided with opening, the left sleeve and the right sleeve are solid with 9 laser welding of the elastic element
It is fixed；
Small sleeve 6 is set in the elastic element 9, and one end of the small sleeve 6 is pierced by first preformed hole
And weld therewith, the other end of the small sleeve 6 is pierced by the opening, is not contacted with the small sleeve 6.
Vibratory string 4 and a pair of of clamping element 3, the vibratory string 4 pass through the small sleeve 6, both ends to be pressed from both sides by a pair of of clamping element 3
Tightly, a pair of of clamping element 3 is inserted into left sensor terminal 201 and right sensor terminal 202 respectively, and vibratory string 4 penetrates pre- among clamping element
Behind the perforation duct stayed, fastening nail is penetrated on the outside of clamping element and squeezes to clamp vibratory string by the opposite both sides of clamping element.
Magnetic induction ring 12 is wrapped on small sleeve 6 by epoxy resin layer, and is not covered the small sleeve 6
The signal at both ends, the magnetic induction ring 12 is exported from cable 13, and the cable 13 is pierced by the elastic element 9 and is located at outer sleeve
5 outside；
Grating 10 and temperature-compensating grating 11 are strained, the strain grating 10 is pasted on the medial surface of the elastic element 9,
The temperature-compensating grating 11 is pasted on the outer surface of small sleeve 6, the tail optical fiber of the strain grating 10 and temperature-compensating grating 11
111 are pierced by the elastic element 9 and the outside positioned at outer sleeve 5.
Wherein, erection support 1 includes pedestal and a pair of of otic placode；A pair of of otic placode is set to institute along the axially spaced-apart of outer sleeve 5
It states on pedestal, U-shaped card mouth is offered on the otic placode, and bayonet both sides are provided with screw hole；
Wherein, the left sensor terminal 201 and right sensor terminal 202 penetrate the middle part of erection support 1 to periphery
Extend to form fixing piece 2；
Wherein, fastening bolt 14 penetrates screw hole and consolidates the left sensor terminal 201 and right sensor terminal 202 from both sides
It is fixed.
Wherein, the tail optical fiber 111 for straining grating 10 and temperature-compensating grating 11 penetrates the cable 13 and is pierced by together described
Elastic element 9.
Wherein, the elastic element 9 is made of steel alloy, wall thickness 0.5mm, and using steel alloy, elasticity is big, answers
Become grating 10 and is pasted on 9 inner surface of elastic element.
Wherein, further include capping 8, cover at the outside of the elastic element 9, and fix by the first bolt 7, it will
Elastic element 9 and outer closures.
Wherein, a diameter of 9mm of the outer sleeve 5, a diameter of 2mm of the small sleeve 6.
It carries out the vibrating wire sensor (comparative example 1) of the sensor of embodiment 1 and market as shown in FIG. 6 purchase to answer loss on transmission
The detection of mistake, for detecting half a year, the results are shown in Figure 5.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (6)
1. optical fiber vibratory string combines and the adjustable surface-mount type sensor of initial value, which is characterized in that including：
Outer sleeve is made of left sleeve and right sleeve, and the right end of the left end of the left sleeve and right sleeve passes through left biography respectively
Sensor end and right sensor terminal block；
A pair of of erection support, is located at the both ends of outer sleeve, and respectively with the left sensor terminal and right sensor side
Head is fixed；
Elastic element, is hollow cylindrical structure, and the side of left sleeve is provided with the first preformed hole, towards the right side
The side of sleeve is provided with opening, and the left sleeve and the right sleeve are fixed with the elastic element；
Small sleeve is set in the elastic element, and one end of the small sleeve is pierced by first preformed hole and therewith
Welding, the other end of the small sleeve are pierced by the opening, are not contacted with the small sleeve；
Vibratory string and a pair of of clamping element, the vibratory string pass through the small sleeve, both ends to be clamped by a pair of of clamping element, and a pair clamps
Part is inserted into left sensor terminal and right sensor terminal respectively；
Magnetic induction ring is wrapped on small sleeve by epoxy resin layer, and is not covered the both ends of the small sleeve, described
The signal of magnetic induction ring is exported from cable, and the cable is pierced by the elastic element and the outside positioned at outer sleeve；
Grating and temperature-compensating grating are strained, the strain grating is pasted on the medial surface of the elastic element, and the temperature is mended
Repay the outer surface that grating is pasted on small sleeve, the tail optical fiber of the strain grating and temperature-compensating grating be pierced by the elastic element and
Positioned at the outside of outer sleeve.
2. optical fiber vibratory string combination as described in claim 1 and the adjustable surface-mount type sensor of initial value, which is characterized in that installation branch
Seat includes pedestal and a pair of of otic placode；A pair of of otic placode is set to along the axially spaced-apart of outer sleeve on the pedestal, is opened on the otic placode
It is provided with screw hole equipped with U-shaped card mouth, and positioned at bayonet both sides；
The middle part that the left sensor terminal and right sensor terminal penetrate erection support extends outside to form fixing piece；
Wherein, fastening bolt penetrates screw hole and fixes the left sensor terminal and right sensor terminal from both sides.
3. optical fiber vibratory string combination as described in claim 1 and the adjustable surface-mount type sensor of initial value, which is characterized in that answer darkening
The tail optical fiber of grid and temperature-compensating grating penetrates the cable and is pierced by the elastic element together.
4. optical fiber vibratory string combination as described in claim 1 and the adjustable surface-mount type sensor of initial value, which is characterized in that the bullet
Property element is made of steel alloy, wall thickness 0.5mm.
5. optical fiber vibratory string combination as described in claim 1 and the adjustable surface-mount type sensor of initial value, which is characterized in that further include
Capping, covers at the outside of the elastic element, by elastic element and outer closures.
6. optical fiber vibratory string combination as described in claim 1 and the adjustable surface-mount type sensor of initial value, which is characterized in that described outer
A diameter of 7-9mm of sleeve, a diameter of 2-3mm of the small sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810411783.0A CN108759701B (en) | 2018-05-02 | 2018-05-02 | Surface-mounted sensor with optical fiber vibrating wire combination and adjustable initial value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810411783.0A CN108759701B (en) | 2018-05-02 | 2018-05-02 | Surface-mounted sensor with optical fiber vibrating wire combination and adjustable initial value |
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| Publication Number | Publication Date |
|---|---|
| CN108759701A true CN108759701A (en) | 2018-11-06 |
| CN108759701B CN108759701B (en) | 2020-03-03 |
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| CN201810411783.0A Active CN108759701B (en) | 2018-05-02 | 2018-05-02 | Surface-mounted sensor with optical fiber vibrating wire combination and adjustable initial value |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110332914A (en) * | 2019-07-29 | 2019-10-15 | 基康仪器股份有限公司 | A kind of type vibration wire water pressure resistance strain gauge |
| CN110763198A (en) * | 2019-11-27 | 2020-02-07 | 深圳中科传感科技有限公司 | Photoelectric composite inclinometer and inclination measuring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN110763198A (en) * | 2019-11-27 | 2020-02-07 | 深圳中科传感科技有限公司 | Photoelectric composite inclinometer and inclination measuring system |
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| Publication number | Publication date |
|---|---|
| CN108759701B (en) | 2020-03-03 |
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