CN107796544A - A kind of preparation method of measuring electrode - Google Patents
A kind of preparation method of measuring electrode Download PDFInfo
- Publication number
- CN107796544A CN107796544A CN201710882342.4A CN201710882342A CN107796544A CN 107796544 A CN107796544 A CN 107796544A CN 201710882342 A CN201710882342 A CN 201710882342A CN 107796544 A CN107796544 A CN 107796544A
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- China
- Prior art keywords
- electrode
- top cover
- base
- carbon fiber
- preparation
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- 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.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/18—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/06—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of piezo-resistive devices
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a kind of preparation method of measuring electrode.For new distribution type pressure sensor of the fibre reinforced composites as sensitive material, the electrode for wire connection is integrated on material internal carbon fiber：First, in the fabrication stage of fiber-reinforced fabric, previously prepared electrodes base is fixed on mandrel or support, and controls the carbon fiber of required measurement to fall on base, after the completion of fabric manufacture, electrode top cover is arranged on base, fixes carbon fiber；Secondly, in resin injection phase, electrode top cover surface can be completely superposed with mould inner surface, and after resin solidification, row conductor connection can be entered by removing electrode surface residual resin with sand paper.The present invention can effectively solve the problem that the difficulty that electrode is prepared in composite inner, easy to operate, can be combined with existing composite material manufacturing process, can be in the case where not changing composite bulk strength substantially, there is provided permanently effective measuring electrode connection.
Description
Technical field
The present invention relates to electrode preparation method, more particularly, to a kind of preparation of measuring electrode on fibre reinforced composites
Method.
Background technology
In the development of the past few decades, fibre reinforced composites technology is more ripe, using fiber-reinforced composite material
Material replaces conventional metals so as to realize each department of the light-weighted method in national economy, such as automobile ship, Aero-Space, wind
Also more and more applied in the fields such as power generating.However, fibre reinforced composites are while extensive use is obtained,
Lot of challenges is faced with, wherein security is matter of utmost importance.Fibre reinforced composites gradually instead of metal, many important
Link uses as structural member, these parts or itself is constantly impacted, or will cause when being damaged great
Security incident.
And compared with metal material, composite had both internally received bigger damage, and was shown less in outside
Deformation, this causes composite material structural member in use, and the monitoring to its internal injury situation becomes particularly significant.It is right
Composite inner degree of impairment is the most directly perceived and accurate detection method is to be splitted carry out microscopic photography, but this is obvious only
Means of the energy as ex-post analysis, and in order to determine the degree of impairment in composite, phase on the premise of structure is not destroyed
The researchers in pass field have been realized in a variety of non-demolition formula detection methods.
Researchers have found：Carbon fiber in composite shows resistance value with material in polymeric matrix
The generation of portion's damage and the characteristic that changes, carbon fiber resistance method of temperature measurement is existed the characteristics of this " structure-function integration "
The monitoring of damage of composite materials is realized in the case of not increasing sensor additionally.
And carbon fiber is in the protection of polymeric matrix in the composite, so how to carry out resistance measurement band to it
The problem of " wiring is difficult " that comes.In an experiment, for convenience, often connected between lead and carbon fiber simply by conductive silver glue,
Protected again with insulating tape outside.Although this connection is easy, it is apparent that being not suitable for needing long-term stable operation, environment more multiple
Miscellaneous practical application.Therefore, electroplating technology is applied in also carbon fiber wiring, that is, first passes through physics and gone with chemical method
Except surface polymer, carbon fiber is exposed, then consolidated by plating in its forming metal layer on surface, the method for last lead welding
It is scheduled on surface.Lead prepared by this method is more firm, but technique also becomes increasingly complex.The lead of this internal fiber connects
It is access to toward being transformed again after composite fibre shaping, accordingly, there exist the defects of wiring difficulty.
The content of the invention
In being connected for existing fibre reinforced composites internal carbon fibers electrode the defects of " wiring difficult ", the application is from increasing
Strong fabric stage is started with, and completes lead access at this moment, the lead connection that can be not only stablized, and can be reduced extra
Technological process.The application provides a kind of easy reliable electrode preparation method.Gold is prepared on carbon fiber in this way
It is compatible with the existing manufacturing process of fibre reinforced composites to belong to electrode, and electrode pair composite entirety mechanicalness can be reduced
The negative effect of energy, form reliable and stable electrode connection.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of preparation method of measuring electrode, passed for new distribution type pressure of the fibre reinforced composites as sensitive material
Sensing unit：In the weaving process of fiber-reinforced fabric, the supporting construction surface of fabric form is maintained in mandrel or support etc., will
Electrodes base is fixed on required position；After weaving starts, control needs the carbon fiber of connection electrode to fall on electrodes base
In otch；After weaving terminates, electrode top cover is arranged on base, it is ensured that carbon fiber is fixed in electrode.It is molded in resin
In the stage, surface is prepared into the mandrel of fiber-reinforced fabric or support is put into injection mold, it is ensured that electrode height can make it
Top cover surface is completely superposed with mould inner surface；After injection terminates, composite is removed from the molds simultaneously etc. after resin solidification
Separate with mandrel or support, then removed the remaining resin of electrode surface with sand paper, with the method for welding by measure traverse line with
Electrode connects.
Further, as preferred：
Electrode can manufacture and design by the following method：Electrode material selects metallic copper or aluminium, and is designed to base and top cover two
Individual part.
Electrodes base is connected with mandrel or rack surface, and electrodes base bottom lower surface shape needs to arrange electrode with surface
Position consistency, the two is bonded with two-sided tape；Base top is the threaded cylinder in a surface, and a vertical incision is by cylinder
It is divided into left and right two halves；When electrodes base is installed, it need to ensure that cut-out direction is consistent with carbon fiber axial direction, weave carbon fiber
During smoothly can fall in otch.Electrode top cover is connected with injection mold inner surface, therefore top cover upper surface shape and mould
The tool inner surface position to be contacted is consistent；Top cover bottom is the cylinder of an inner surface Hu screw thread, and each size energy of screw thread
Coordinate with whorl of base.After electrodes base is installed together with top cover, carbon fiber can be fixed in otch, base is fixed on
Mandrel or rack surface, top cover upper surface are bonded with mould inner surface.
Electrode surface is needed by following processing：The upper base surface of electrodes base, the top lower surface of electrode top cover and
Cylinder outer surface spray insulation paint, is surprisingly contacted with the carbon fiber for preventing electrode adjacent with surrounding, causes measurement error.
The invention has the advantages that：
The present invention starts with from enhancing fabric stage, and before Shooting Technique, it is fine that carbon is carried out directly on woven fabric
Electrode is tieed up to prepare, not only technique is simple, reliable and stable, and after rational Position Design, electrode pair structure part intensity
Influence can also be reduced to tolerance interval.
Brief description of the drawings
Fig. 1 is the electrode structure schematic diagram for composite pipe；
Fig. 2 is integrated schematic diagram of the electrode on fiber-reinforced fabric；
Fig. 3 is typical measuring contact resistance result.
In figure：1st, insulated paint, 2, electrode top cover top, 3, electrode top cover cylinder, 4, electrode top cover, 5, otch, 6, electrode
Base cylinder, 7, electrodes base bottom, 8, electrodes base, 9, electrode, 10, Kevlar-29 fibers, 11, carbon fiber.
Embodiment
The present invention is further illustrated with example below in conjunction with the accompanying drawings.
Shown in Fig. 1 is one group of measuring electrode structure for carbon fiber on fibre reinforced composites pipe fitting.Electrode bottom
Seat bottom 7 is used for fixed cylinder core surface, and the upper face shape of electrode top cover 4 is identical with mold cylinder shape inner surface.Electrode
Overall high 5 millimeters and pipe fitting consistency of thickness, it is ensured that top cover upper surface just overlaps with mould inner surface.Electrodes base cylinder
1 millimeter of 6 structure center cutout, 5 width, can allow carbon fiber to extend there through, and the surface of electrodes base cylinder 6 is M4 screw threads, with electrode
The inner surface screw thread of top cover cylinder 3 coordinates；In said structure, electrode top cover top 2 forms electrode top cover 4 with electrode top cover cylinder 3,
Electrodes base 8 is formed on otch 5, electrodes base cylinder 6 and electrodes base bottom 7, and the middle part of electrodes base cylinder 6 sets cylindrical groove,
When electrodes base 8 is installed with electrode top cover 4, electrode top cover cylinder 3 is inserted in the cylindrical groove.As shown in figure 1, at electrodes base bottom
Table, the outer surface of electrode top cover cylinder 3 and the lower surface spray insulation paint 1 of electrode top cover top 2 above portion 7, to prevent that other carbon are fine
Dimension contacts with electrode causes measurement error.
24 strands of Kevlar-29 fibers 10 are woven in diameter 25mm cylinder using annular weaving method by this example
On mandrel, and it is incorporated into by the use of the beautiful T700-12K carbon fibers 11 of 4 shareholders as axle yarn in fabric and is used as sensitive fibres, per share carbon fiber two
End respectively connects a copper electrode.Before braiding starts, all electrodes bases are first fixed on what axle yarn to be incorporated into two-sided tape
Position, and make otch 5 and axle yarn weaving direction（That is mandrel axial direction）Unanimously.Then begin to weave, during ensure that carbon fiber falls
Enter in otch 5, other fibers are centered around around cylinder.After braiding terminates, electrode top cover 4 is arranged on electrodes base 8, makes carbon
Fiber is connected with electrode seal, as shown in Figure 2.Then enhancing fabric is put into cylindrical die together with mandrel, carried out
Resin is molded, and again takes out composite after solidification, removes mandrel.If there is resin residue the upper surface of electrode top cover 4, with carefully
Sand paper removes resin, and the metal surface exposed can enter row conductor connection.Fig. 3 is to each on 4 strands of carbon fibers 11
Electrode and the interelectrode resistivity measurements of initial position, electrode spacing 10cm, every carbon fiber Top electrode number is five,
Data are carried out with linear fit, fitting a straight line and Y-axis intersection point are theoretic contact resistance value.
Claims (4)
1. a kind of preparation method of measuring electrode, it is characterised in that comprise the following steps：
（1）In the weaving process of fiber-reinforced fabric, on supporting construction surface, electrodes base is fixed on required position；
After weaving starts, control needs the carbon fiber of connection electrode, is allowed in the neck on electrodes base；, will after weaving terminates
Electrode top cover is arranged on base, and ensures that carbon fiber is fixed in electrode；
（2）In resin injection phase, the supporting construction that surface is prepared to fiber-reinforced fabric is put into injection mold, it is ensured that electricity
High degree can be such that its top cover surface is completely superposed with mould inner surface；After injection terminates, etc. after resin solidification by composite
It is removed from the molds and is separated with supporting construction, is then removed the remaining resin of electrode surface with sand paper, and by measure traverse line
It is connected with electrode.
2. the preparation method of a kind of measuring electrode according to claim 1, it is characterised in that described electrode can pass through
Following method manufactures and designs：
（1）Electrode material selects metallic copper or aluminium, including base and two parts of top cover；
（2）Electrodes base is connected with supporting construction surface, and electrodes base bottom lower surface shape needs to arrange electrode with surface
Position consistency；Base top is the threaded cylinder in a surface, and the cylinder is divided into left and right two halves by a vertical incision；This is vertical
Cut-out direction and carbon fiber axle are to consistent, to ensure that carbon fiber smoothly can fall in otch in weaving process；
（3）Electrode top cover is connected with injection mold inner surface, and top cover upper surface shape wants contact position with mould inner surface
Shape be consistent；Top cover bottom is the cylinder that an inner surface sets screw thread, and each size of screw thread can coordinate with whorl of base；
（4）Electrodes base is installed together with top cover, and carbon fiber initial position is fixed in otch, and base is fixed on support knot
Structure surface, top cover upper surface are bonded with mould inner surface.
3. the preparation method of a kind of measuring electrode according to claim 1, it is characterised in that described electrode surface needs
By following processing：The upper base surface of electrodes base, the top lower surface of electrode top cover and cylinder outer surface spray insulation paint.
A kind of 4. preparation method of measuring electrode according to claim any one of 1-3, it is characterised in that：Described support
Structure is mandrel or support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710882342.4A CN107796544B (en) | 2017-09-26 | 2017-09-26 | Preparation method of measuring electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710882342.4A CN107796544B (en) | 2017-09-26 | 2017-09-26 | Preparation method of measuring electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107796544A true CN107796544A (en) | 2018-03-13 |
| CN107796544B CN107796544B (en) | 2023-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710882342.4A Active CN107796544B (en) | 2017-09-26 | 2017-09-26 | Preparation method of measuring electrode |
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| Country | Link |
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| CN (1) | CN107796544B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109177207A (en) * | 2018-07-09 | 2019-01-11 | 黄河科技学院 | Para-aramid fiber enhances unsaturated-resin board making and stress measuring method |
| CN110736669A (en) * | 2019-10-30 | 2020-01-31 | 浙江理工大学 | impact detection method for carbon fiber reinforced composite material based on piezoelectric fibers |
Citations (5)
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|---|---|---|---|---|
| US4715235A (en) * | 1985-03-04 | 1987-12-29 | Asahi Kasei Kogyo Kabushiki Kaisha | Deformation sensitive electroconductive knitted or woven fabric and deformation sensitive electroconductive device comprising the same |
| CN1492221A (en) * | 2003-08-22 | 2004-04-28 | 武汉理工大学 | Self diagnostic intellgient structure of fiber reinforced resin base composite material and method for self diagnosis |
| CN102797185A (en) * | 2012-07-10 | 2012-11-28 | 东南大学 | Intelligent FRP (Fiber Reinforced Polymer) composite rib based on carbon fiber distribution type sensing and large-scale production process thereof |
| CN105819662A (en) * | 2016-04-12 | 2016-08-03 | 蔡永辉 | Electroosmosis belt type sludge squeezing and dewatering equipment |
| CN107063522A (en) * | 2015-11-25 | 2017-08-18 | 皮尔茨公司 | Safety pad for guard technology equipment |
-
2017
- 2017-09-26 CN CN201710882342.4A patent/CN107796544B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4715235A (en) * | 1985-03-04 | 1987-12-29 | Asahi Kasei Kogyo Kabushiki Kaisha | Deformation sensitive electroconductive knitted or woven fabric and deformation sensitive electroconductive device comprising the same |
| CN1492221A (en) * | 2003-08-22 | 2004-04-28 | 武汉理工大学 | Self diagnostic intellgient structure of fiber reinforced resin base composite material and method for self diagnosis |
| CN102797185A (en) * | 2012-07-10 | 2012-11-28 | 东南大学 | Intelligent FRP (Fiber Reinforced Polymer) composite rib based on carbon fiber distribution type sensing and large-scale production process thereof |
| CN107063522A (en) * | 2015-11-25 | 2017-08-18 | 皮尔茨公司 | Safety pad for guard technology equipment |
| CN105819662A (en) * | 2016-04-12 | 2016-08-03 | 蔡永辉 | Electroosmosis belt type sludge squeezing and dewatering equipment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109177207A (en) * | 2018-07-09 | 2019-01-11 | 黄河科技学院 | Para-aramid fiber enhances unsaturated-resin board making and stress measuring method |
| CN110736669A (en) * | 2019-10-30 | 2020-01-31 | 浙江理工大学 | impact detection method for carbon fiber reinforced composite material based on piezoelectric fibers |
| CN110736669B (en) * | 2019-10-30 | 2022-02-22 | 浙江理工大学 | Impact detection method for carbon fiber reinforced composite material based on piezoelectric fibers |
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| Publication number | Publication date |
|---|---|
| CN107796544B (en) | 2023-07-18 |
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