CN108426919A - Detect the method and device of carbon fiber enhancement resin base composite material damage - Google Patents
Detect the method and device of carbon fiber enhancement resin base composite material damage Download PDFInfo
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- CN108426919A CN108426919A CN201810149098.5A CN201810149098A CN108426919A CN 108426919 A CN108426919 A CN 108426919A CN 201810149098 A CN201810149098 A CN 201810149098A CN 108426919 A CN108426919 A CN 108426919A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
Abstract
The present invention provides a kind of method of detection carbon fiber enhancement resin base composite material damage, including：Intersect the final state resistance value for the carbon fiber for measuring Y-axis arrangement and the final state resistance value of the carbon fiber of X-axis arrangement；Calculate the first difference and the second difference；Size and crossover location according to the first difference and the second difference obtain the position range and degree of injury of carbon fiber enhancement resin base composite material damage.A kind of device of detection carbon fiber enhancement resin base composite material damage is also provided, including：Main body, processor and the ends PC to be detected.It is measured by the resistance to polymer matrix composites surface conductance carbon fiber, to realize the monitoring to the generation of composite inner micro-crack, position, size, high certainty of measurement, measurement method is simple and convenient, as a result provide in graphical form it is straightforward, without carrying out cumbersome data handling procedure.
Description
Technical field
The invention belongs to inspection technique fields inside resin base engineering material more particularly to a kind of in situ detection carbon fiber to increase
The method and device of strong polymer matrix composites damage.
Background technology
Carbon fiber enhancement resin base composite material has the very good mechanical properties of high specific strength, specific modulus, but in its application
Can generate naked eyes in component inside when in the process due to temperature, impact, chemical attack, especially low speed impact can not observe
Damage, this damage can cause component fatal destruction.
It is developed and applies based on this series of inspection technique, such as x-ray inspection, Ultrasonic C-Scan, sample are cut
Piece, vortex scene and thermal imaging method, but all there is certain limitations for these technical methods, cannot meet live carbon fiber in situ
Tie up the requirement detected a flaw inside polymer matrix composites.And these technologies are further limited in laboratory and carry out, testing cost is expensive, together
Shi Wufa detects the damage on three-dimensional dimension.In addition to this, in terms of the measurement of conductive carbon fibre resistance, although multimeter can be straight
Reading data, but the larger resistance variations situation that cannot accurately measure conductive fiber of its error are connect, and needs survey calculation one by one,
Intricate operation, it is time-consuming and laborious.
Invention content
In order to solve the above technical problems, the present invention provides a kind of in situ detection carbon fiber enhancement resin base composite material damage
Method and device.In order to the embodiment to disclosure some aspects there are one basic understanding, be shown below simple general
It includes.The summarized section is not extensive overview, nor to determine key/critical component or describe the protection of these embodiments
Range.Its sole purpose is that some concepts are presented with simple form, in this, as the preamble of following detailed description.
The present invention adopts the following technical scheme that：
In some optional embodiments, a kind of method of detection carbon fiber enhancement resin base composite material damage is provided,
Including：Prepare the main body to be detected of carbon fiber resin matrix composite；Intersect the carbon fiber for measuring the main body Y-axis arrangement to be detected
The final state resistance value of the carbon fiber of final state resistance value and the X-axis arrangement of dimension；Calculate Y-axis arrangement carbon fiber final state resistance value with
The final state resistance value and X-axis of first difference of the initial state resistance value of the carbon fiber of Y-axis arrangement and the carbon fiber of X-axis arrangement
Second difference of the initial state resistance value of the carbon fiber of arrangement；Size and intersection position according to first difference and the second difference
Set the position range and degree of injury for obtaining carbon fiber enhancement resin base composite material damage.
In some optional embodiments, the process packet of the main body to be detected for preparing carbon fiber resin matrix composite
It includes：O ° of prepreg group is intersected from top to bottom with 90 ° of prepreg groups and is stacked, the O ° of prepreg group is by two O ° of unidirectional pre-immersion materials
Layer composition, the 9O ° of prepreg group are made of two 9O ° of unidirectional pre-immersion material layers；In two O ° of lists of first group of O ° of prepreg group
It is touched to pairs of metal is placed between prepreg and between two 9O ° of unidirectional pre-immersion material layers of first group of 90 ° of prepreg group
Head so that constituting electrical circuit with the fiber that is connected per a pair of metal contact becomes a sensor；Two resin films are set respectively
In the surface layer of Carbon fiber laminated board and bottom.
In some optional embodiments, the method for the detection carbon fiber enhancement resin base composite material damage, also
Including：The numerical values recited and different colors of first difference and second difference is corresponding, and according to intersection position
Tagging is on the page.
In some optional embodiments, the method for the detection carbon fiber enhancement resin base composite material damage, also
Including：The final state resistance value of the final state resistance value of the carbon fiber of the Y-axis arrangement of acquisition and the carbon fiber of X-axis arrangement is converted into number
Word amount extracts digital quantity, and the digital quantity extracted is changed into voltage data.
In some optional embodiments, the present invention provide it is a kind of detection carbon fiber enhancement resin base composite material damage
Device, including：Main body, processor and the ends PC to be detected, the ends PC include：Computing module and analysis module；The processor,
For controlling relay array switch test point, intersect the final state resistance for the carbon fiber for measuring the main body Y-axis arrangement to be detected
The final state resistance value of value and the carbon fiber of X-axis arrangement, and be converted to voltage data and be uploaded to the ends PC；Computing module is used for
The first difference of the final state resistance value and the initial state resistance value of the carbon fiber of Y-axis arrangement of the carbon fiber of Y-axis arrangement is calculated, and
Second difference of the final state resistance value of the carbon fiber of X-axis arrangement and the initial state resistance value of the carbon fiber of X-axis arrangement；Analyze mould
Block, for obtaining carbon fiber enhancement resin base composite material according to the size and crossover location of first difference and the second difference
The position range and degree of injury of damage.
In some optional embodiments, the main body to be detected includes：Several O ° of prepreg groups, several 90 ° of prepregs
Group, metal contact, Carbon fiber laminated board and two resin films；O ° of prepreg group is made of two O ° of unidirectional pre-immersion material layers, 9O °
Prepreg group is made of two 9O ° of unidirectional pre-immersion material layers；O ° of prepreg group is intersected from top to bottom with 90 ° of prepreg groups to be stacked,
Between two O ° of unidirectional pre-immersion material layers of first group of O ° of prepreg group and two 9O ° of first group of 90 ° of prepreg group unidirectional pre-
It is placed in pairs of metal contact between the leaching bed of material so that constituting electrical circuit with the fiber that is connected per a pair of metal contact becomes a biography
Sensor；Two resin films are respectively placed in surface layer and the bottom of Carbon fiber laminated board.
In some optional embodiments, the ends PC further include：Corresponding display module, for by first difference and
The numerical values recited and different colors of second difference are corresponding, and according to crossover location label on the page.
In some optional embodiments, the device of the detection carbon fiber enhancement resin base composite material damage, also
Including：Modulus conversion chip, the final state resistance value of the carbon fiber of the Y-axis arrangement for that will acquire and the carbon fiber of X-axis arrangement
Final state resistance value is converted to digital quantity.
In some optional embodiments, the device of the detection carbon fiber enhancement resin base composite material damage, also
Including：Driving chip realizes relay array switching for driving the relay open and close.
Advantageous effect caused by the present invention：It is surveyed by the resistance to polymer matrix composites surface conductance carbon fiber
Amount, to realize the monitoring to the generation of composite inner micro-crack, position, size, high certainty of measurement can be effectively to tree
The damage position and size of resin-based composite are detected, and measurement method is simple and convenient, are as a result provided in graphical form straight
Connect it is clear, without carrying out cumbersome data handling procedure；And it is true to carry out undamaged crack detection in commission component
Determine the service life of the pre- primary member of positions and dimensions size of crackle.
For above-mentioned and relevant purpose, one or more embodiments include being particularly described below and in claim
In the feature that particularly points out.Certain illustrative aspects are described in detail in the following description and the annexed drawings, and its instruction is only
Some modes in the utilizable various modes of principle of each embodiment.Other benefits and novel features will be under
The detailed description in face is considered in conjunction with the accompanying and becomes apparent, the disclosed embodiments be all such aspects to be included and they
Be equal.
Description of the drawings
Fig. 1 is the flow diagram of the method for present invention detection carbon fiber enhancement resin base composite material damage；
Fig. 2 is the structural schematic diagram of the device of present invention detection carbon fiber enhancement resin base composite material damage；
Fig. 3 is the structural schematic diagram of present invention main body to be detected；
Fig. 4 is resistance measurement partial circuit figure of the present invention.
Specific implementation mode
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to
Put into practice them.Other embodiments may include structure, logic, it is electrical, process and other change.Embodiment
Only represent possible variation.Unless explicitly requested, otherwise individual components and functionality is optional, and the sequence operated can be with
Variation.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This hair
The range of bright embodiment includes equivalent obtained by the entire scope of claims and all of claims
Object.
As shown in Figure 1, in some illustrative embodiments, providing a kind of detection carbon fiber enhancement resin base composite material
The method of damage, based on conductive fiber, the detection damaged to material internal is realized in the variation of self-resistance value after outer force effect,
To realize the monitoring to the generation of carbon fiber enhancement resin base composite material internal tiny crack, position, size.
The method of the detection carbon fiber enhancement resin base composite material damage of the present invention, including：
101：Prepare the main body to be detected of carbon fiber resin matrix composite.Carbon fibre of composite material unidirectional pre-immersion material is arranged
Cloth is to fold carbon fiber one-way prepreg by the conventional sequence for preparing carbon fibre laminate composites in carbon fiber direction
It puts.
Detailed process is as follows：
First, O ° of prepreg group is intersected from top to bottom with 90 ° of prepreg groups and is stacked.Wherein, O ° of prepreg group is by two
O ° of unidirectional pre-immersion material layer composition, 9O ° of prepreg group are made of two 9O ° of unidirectional pre-immersion material layers.
Then, between two O ° of unidirectional pre-immersion material layers of first group of O ° of prepreg group and first group of 90 ° of prepreg group
Two 9O ° of unidirectional pre-immersion material layers between be placed in the metal contact of pairs of a diameter of 0.4mm so that per a pair of metal contact with
The fiber that is connected, which constitutes electrical circuit, becomes a sensor.
Finally, two resin films are respectively placed in surface layer and the bottom of Carbon fiber laminated board.
Carbon fiber laminated board is prepared using vacuum-autoclave method：Prefabricated carbon fiber plate is fitted into vacuum bag, then together
It is put into autoclave, and vacuum bag is connected with vacuum mechanical pump, vacuum mechanical pump is opened and carries out the gas in extraction sample.Simultaneously
Autoclave is raised to 80 DEG C of heat preservation 10-20min with the rate of 2 DEG C/min, epoxy melting in such carbon fiber prepreg, opens
Nitrogen air accumulator is opened, it is 0.25-0.5MPa to make the pressure in autoclave, and the temperature of autoclave continues with the rate liter of 2 DEG C/min
To 120 DEG C, 2-3h is kept the temperature, heater is then shut off, waited for that autoclave naturally cools to room temperature, close vacuum mechanical pump and air accumulator
Valve finally opens autoclave exhaust valve, and air pressure in tank is made to drop to the pressure of atmospheric pressure, and it is spare to take out sample.
102：Intersect the carbon fiber of the final state resistance value for measuring the carbon fiber that main body Y-axis to be detected is arranged and X-axis arrangement
Final state resistance value.The direction of the carbon fiber of wherein O ° prepreg group is as Y-axis, and the direction of the carbon fiber of 9O ° of prepreg group is as X
Axis.
In Carbon fiber laminated board by external force such as impact force, active force passes to reinforcement carbon fiber by resin matrix,
Fracture or deformation occur for carbon fiber stress, are broken or are stretched according to carbon fiber, and resistance increases, and are squeezed resistance reduction
Changing rule measures the resistance of the carbon fiber of cross arrangement in composite material by ohm method, can accurately measure
The position of composite material laminated board loss and range, and change the degree for determining loss according to resistance sizes.What the present invention used
Operating voltage is 15V, before testing, is verified to operating voltage using AD1 samplings, starts to check if meeting 15V, if
It is impossible to meet 15V, exits and require to carry out Inspection and maintenance to device work.Simultaneously in order to protect proper device operation, work
Electric current can not be more than 60mA, so the resistance R3 for 250 Ω that connect in test point.
It is as follows to intersect the detailed process measured：
First, the final state resistance R of the carbon fiber of test Y-axis arrangementy,j, j=1 ... 15.Under driving chip effect, after
Electric appliance is closed/disconnects test point KA1 to KA15 successively, and tested K A1 is to the voltage value between test point KA16 respectively, to be waited for
Detect the final state resistance value R of the carbon fiber of main body Y-axis arrangementy,j：
Wherein j=1 ... 15.
Then, the resistance R of the carbon fiber of test X-axis arrangementx,i, i=1 ... 15).Y-axis circuit disconnects first, similarly exists
Under driving chip effect, relay is closed/disconnects test point KA1 ... ..., KA15 successively, distinguishes tested K A1 extremely, KA15 and survey
Voltage value between pilot KA16, to obtain the final state resistance value R for the carbon fiber that main body X-axis to be detected is arrangedx,i,：
Wherein i=1 ... 15.
Thereby realize the final state electricity of the carbon fiber of relay array switch test point cross-beta X-axis and Y-axis arrangement
Resistance value.
103：The final state resistance value of the carbon fiber of final state resistance value and the X-axis arrangement for the carbon fiber that the Y-axis of acquisition is arranged
Digital quantity is converted to, digital quantity is extracted, and the digital quantity extracted is changed into voltage data, is uploaded to the ends PC and is divided
Analysis.
104：Calculate the final state resistance value and the initial state resistance value of the carbon fiber of Y-axis arrangement of the carbon fiber of Y-axis arrangement
First difference and the final state resistance value of the carbon fiber of X-axis arrangement and the second of the initial state resistance value of the carbon fiber of X-axis arrangement
Difference.
105：Size and crossover location according to the first difference and the second difference obtain carbon fiber enhancement resin base composite wood
Expect the position range and degree of injury of damage.
106：The numerical values recited of first difference and the second difference and different colors is corresponding, and according to crossover location
Label is on the page.It identifies and judges for the ease of operating personnel, keep the bigger color of resistance difference deeper, in the human-computer interaction page
The difference range measured twice, resistance difference are represented with different colors>2 Ω colors are most deep, and damage is serious, the smaller face of difference
Color is more shallow, resistance difference<0.05 Ω is most shallow, and damage is most light, so as to the clear damage position for finding out plank.
As shown in Figures 2 and 3, in some illustrative embodiments, it is compound to provide a kind of detection carbon fiber enhancement resin base
The device of material damage, with 15 metal contacts, the size of carbon fibre composite is 80mm × 80mm, and metal contact spacing is
It is illustrated for 5mm.
The present invention detection carbon fiber enhancement resin base composite material damage device include：Main body 1 to be detected, processor
2, modulus conversion chip 3, driving chip 4, voltage follower 5 and the ends PC 6.
Main body 1 to be detected includes：Several O ° of prepreg groups, several 90 ° of prepreg groups, metal contact 13, carbon fiber lamination
Plate and two resin films 14.Wherein, O ° of prepreg group is made of two O ° of unidirectional pre-immersion material layers 11, and 9O ° of prepreg group is by two
A 9O ° of unidirectional pre-immersion material layer 12 forms.Unidirectional pre-immersion material layer is divided into O ° of unidirectional pre-immersion material layer 11 and 9O ° of unidirectional pre-immersion material layer 12,
If it is O ° of direction to specify the carbon fiber of one of direction, the direction of the carbon fiber vertical with O ° of direction is 9O ° of direction, because
This, prepreg group is divided into O ° of prepreg group and 90 ° of prepreg groups.Wherein, the quantity of prepreg group be 10 layers, 20 layers, 28 layers or
40 layers.
10 layers of carbon fibre of composite material unidirectional pre-immersion material arrangement is followed successively by from top to bottom：O ° of prepreg group, metal contact,
O ° of prepreg group, resin film, 90 ° of prepreg groups, metal contact, 90 ° of prepreg groups, resin film, two O ° of prepreg groups,
Two 90 ° of prepreg groups, two O ° of prepreg groups.
20 layers of carbon fibre of composite material unidirectional pre-immersion material arrangement is followed successively by from top to bottom：O ° of prepreg group, metal contact,
O ° of prepreg group, resin film, 90 ° of prepreg groups, metal contact, 90 ° of prepreg groups, resin film, three O ° of prepreg groups,
Six 90 ° of prepreg groups, three O ° of prepreg groups, two 90 ° of prepreg groups, two O ° of prepreg groups.
28 layers of carbon fibre of composite material unidirectional pre-immersion material arrangement is followed successively by from top to bottom：O ° of prepreg group, metal contact,
O ° of prepreg group, resin film, 90 ° of prepreg groups, metal contact, 90 ° of prepreg groups, resin film, two O ° of prepreg groups,
Two 90 ° of prepreg groups, two O ° of prepreg groups, three 90 ° of prepreg groups, two O ° of prepreg groups, three 90 ° of prepregs
Group, two O ° of prepreg groups, two 90 ° of prepreg groups, two O ° of prepreg groups, two 90 ° of prepreg groups, two O ° of prepregs
Group.
40 layers of carbon fibre of composite material unidirectional pre-immersion material arrangement is followed successively by from top to bottom：O ° of prepreg group, metal contact,
O ° of prepreg group, resin film, 90 ° of prepreg groups, metal contact, 90 ° of prepreg groups, resin film, three O ° of prepreg groups,
Four 90 ° of prepreg groups, four O ° of prepreg groups, four 90 ° of prepreg groups, two O ° of prepreg groups, four 90 ° of prepregs
Group, four O ° of prepreg groups, four 90 ° of prepreg groups, three O ° of prepreg groups, two 90 ° of prepreg groups, two O ° of prepregs
Group.
O ° of prepreg group is intersected from top to bottom with 90 ° of prepreg groups to be stacked.In two O ° of lists of first group of O ° of prepreg group
It is pairs of a diameter of to being placed between prepreg and between two 9O ° of unidirectional pre-immersion material layers of first group of 90 ° of prepreg group
The metal contact of 0.4mm, such as metal contact Y1、Y2、Y3、Y4Respectively with metal contact Y '1、Y’2、Y’3、Y’4For a pair so that every
A pair of of metal contact constitutes electrical circuit with the fiber that is connected becomes a sensor.Two resin films are respectively placed in carbon fiber lamination
The surface layer of plate and bottom.Resin film is insulation polyimide film.
The material of metal contact 13 is copper, and the spacing d between metal contact 12 is 3mm or 5mm, is arranged between two parties to both sides
Cloth, for copper wire quantity n depending on the length l of Carbon fiber laminated board and width w, physical relationship is as follows：
N=l (or w)/d-1.
Since the test point of test is more, using relay 7 come the resistance value between switch test test point, wherein profit
7 open and close of relay is driven with driving chip 4, realizes that the switching of 7 array of relay, driving chip 4 use the 8 of ULN2803
Road Darlington driving chip.Reliable sampled data in order to obtain, using 16 high-precision A/D based on sigma-delta switch technology
Converter carries out AD samplings, such as modulus conversion chip AD7705.The carbon fiber that modulus conversion chip 3 arranges the Y-axis of acquisition
Final state resistance value and the final state resistance value of the carbon fiber of X-axis arrangement are converted to digital quantity.
The measurement of final state resistance value uses ohm method, as shown in figure 4, controlling the voltage at fiber both ends in 15V, and electricity consumption
Pressure follower 5 measures the voltage on Rx, and the wherein resistance value of R3 is 250 Ω, and the calculation formula of precision 1/100, Rx is as follows：
Processor 2, model STM32F103 intersect and are waited for described in measuring for controlling 7 array switch test point of relay
Detect the final state resistance value of the carbon fiber of main body Y-axis arrangement and the final state resistance value of the carbon fiber of X-axis arrangement.Processor 2 is also used
It extracts, and is converted to as practical readable test data, i.e. voltage data in the digital quantity for changing modulus conversion chip,
It is uploaded to the ends PC 6.To sum up, the present invention is connected by conducting wire with the metal contact of composite material end, in this way formed one by
The electricity that relay 7, driving chip 4, conducting wire, processor 2, voltage follower 5, metal contact 13 and carbon fiber composition intersect returns
Road connects composite material laminated board and the ends PC 6.Using the integrated circuit of multiple test pins, one-shot measurement can obtain
Resistance in ejecting plate layer in all metal contacts, and the change rate that data calculate resistance is read automatically, convert data to figure
Table greatly reduces reading and calculates the time of data.
The ends PC 6 include：Computing module, analysis module and corresponding display module.
Computing module, the initial state of the final state resistance value and the carbon fiber of Y-axis arrangement of the carbon fiber for calculating Y-axis arrangement
The initial state resistance of the final state resistance value and the carbon fiber of X-axis arrangement of the carbon fiber of the first difference and the X-axis arrangement of resistance value
Second difference of value；
Analysis module, for obtaining fibre reinforced according to the size and crossover location of first difference and the second difference
The position range and degree of injury of polymer matrix composites damage.
Corresponding display module, for by the numerical values recited of first difference and second difference and different colors into
Row corresponds to, and according to crossover location label on the page.
It should also be appreciated by one skilled in the art that various illustrative logical boxs, mould in conjunction with the embodiments herein description
Electronic hardware, computer software or combinations thereof may be implemented into block, circuit and algorithm steps.In order to clearly demonstrate hardware and
Interchangeability between software surrounds various illustrative components, frame, module, circuit and step its function above and carries out
It is generally described.It is implemented as hardware as this function and is also implemented as software, depends on specific application and to entire
The design constraint that system is applied.Those skilled in the art can be directed to each specific application, be realized in a manner of flexible
Described function, it is still, this to realize that decision should not be construed as the protection domain away from the disclosure.
Claims (9)
1. the method for detecting carbon fiber enhancement resin base composite material damage, which is characterized in that including：
Prepare the main body to be detected of carbon fiber resin matrix composite；
Intersect the final state resistance value for the carbon fiber for measuring the main body Y-axis arrangement to be detected and the final state of the carbon fiber of X-axis arrangement
Resistance value；
The first difference of the final state resistance value and the initial state resistance value of the carbon fiber of Y-axis arrangement of the carbon fiber of Y-axis arrangement is calculated,
And the second difference of the final state resistance value of the carbon fiber of X-axis arrangement and the initial state resistance value of the carbon fiber of X-axis arrangement；
Size and crossover location according to first difference and the second difference show that carbon fiber enhancement resin base composite material damages
The position range and degree of injury of wound.
2. the method for detection carbon fiber enhancement resin base composite material damage according to claim 1, which is characterized in that institute
The process for stating the main body to be detected for preparing carbon fiber resin matrix composite includes：
O ° of prepreg group is intersected from top to bottom with 90 ° of prepreg groups and is stacked, the O ° of prepreg group is by two O ° unidirectional preimpregnation
The bed of material forms, and the 9O ° of prepreg group is made of two 9O ° of unidirectional pre-immersion material layers；
Between two O ° of unidirectional pre-immersion material layers of first group of O ° of prepreg group and two 9O ° of first group of 90 ° of prepreg group
Pairs of metal contact is placed between unidirectional pre-immersion material layer so that constituting electrical circuit with the fiber that is connected per a pair of metal contact becomes
One sensor；
Two resin films are respectively placed in surface layer and the bottom of Carbon fiber laminated board.
3. the method for detection carbon fiber enhancement resin base composite material damage according to claim 2, which is characterized in that also
Including：The numerical values recited and different colors of first difference and second difference is corresponding, and according to intersection position
Tagging is on the page.
4. the method for detection carbon fiber enhancement resin base composite material damage according to claim 3, which is characterized in that also
Including：The final state resistance value of the final state resistance value of the carbon fiber of the Y-axis arrangement of acquisition and the carbon fiber of X-axis arrangement is converted into number
Word amount extracts digital quantity, and the digital quantity extracted is changed into voltage data.
5. detecting the device of carbon fiber enhancement resin base composite material damage, which is characterized in that including：Main body to be detected, processing
Device and the ends PC, the ends PC include：Computing module and analysis module；
The processor intersects the carbon for measuring the main body Y-axis arrangement to be detected for controlling relay array switch test point
The final state resistance value of the carbon fiber of final state resistance value and the X-axis arrangement of fiber, and be converted to voltage data and be uploaded to the ends PC；
Computing module, the initial state resistance of the final state resistance value and the carbon fiber of Y-axis arrangement of the carbon fiber for calculating Y-axis arrangement
The final state resistance value of the carbon fiber of the first difference and the X-axis arrangement of value and the initial state resistance value of the carbon fiber of X-axis arrangement
Second difference；
Analysis module, for obtaining carbon fiber-reinforced resin according to the size and crossover location of first difference and the second difference
The position range and degree of injury of based composites damage.
6. the device of detection carbon fiber enhancement resin base composite material damage according to claim 5, which is characterized in that institute
Stating main body to be detected includes：Several O ° of prepreg groups, several 90 ° of prepreg groups, metal contact, Carbon fiber laminated board and two trees
Membrane of lipoprotein；O ° of prepreg group is made of two O ° of unidirectional pre-immersion material layers, and 9O ° of prepreg group is by two 9O ° of unidirectional pre-immersion material layer groups
At；O ° of prepreg group is intersected from top to bottom with 90 ° of prepreg groups to be stacked, and two O ° in first group of O ° of prepreg group unidirectionally presoaks
It is placed in pairs of metal contact between the bed of material and between two 9O ° of unidirectional pre-immersion material layers of first group of 90 ° of prepreg group so that
Constituting electrical circuit with the fiber that is connected per a pair of metal contact becomes a sensor；Two resin films are respectively placed in carbon fiber layer
The surface layer of pressing plate and bottom.
7. the device of detection carbon fiber enhancement resin base composite material damage according to claim 6, which is characterized in that institute
Stating the ends PC further includes：Corresponding display module, for by the numerical values recited of first difference and second difference from it is different
Color is corresponded to, and according to crossover location label on the page.
8. the device of detection carbon fiber enhancement resin base composite material damage according to claim 7, which is characterized in that also
Including：Modulus conversion chip, the final state resistance value of the carbon fiber of the Y-axis arrangement for that will acquire and the carbon fiber of X-axis arrangement
Final state resistance value is converted to digital quantity.
9. the device of detection carbon fiber enhancement resin base composite material damage according to claim 8, which is characterized in that also
Including：Driving chip realizes relay array switching for driving the relay open and close.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779960A (en) * | 2019-11-13 | 2020-02-11 | 上海交通大学 | CFRP damage detection method based on resistance change |
| US10995037B1 (en) | 2018-12-13 | 2021-05-04 | United States Of America As Represented By The Secretary Of The Air Force | High temperature composite structure and system for detecting degradation thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10995037B1 (en) | 2018-12-13 | 2021-05-04 | United States Of America As Represented By The Secretary Of The Air Force | High temperature composite structure and system for detecting degradation thereof |
| US11780779B1 (en) | 2018-12-13 | 2023-10-10 | United States Of America As Represented By The Secretary Of The Air Force | High temperature composite structure and system for detecting degradation thereof |
| US11814323B1 (en) | 2018-12-13 | 2023-11-14 | United States Of America As Represented By The Secretary Of The Air Force | High temperature composite structure and system for detecting degradation thereof |
| CN110779960A (en) * | 2019-11-13 | 2020-02-11 | 上海交通大学 | CFRP damage detection method based on resistance change |
| CN110779960B (en) * | 2019-11-13 | 2021-07-30 | 上海交通大学 | CFRP damage detection method based on resistance change |
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