CN105158572B - The lower impedance operator measuring method of carbon fibre composite non-destructive lightning current effect and measurement apparatus - Google Patents
The lower impedance operator measuring method of carbon fibre composite non-destructive lightning current effect and measurement apparatus Download PDFInfo
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Abstract
Acting on lower impedance operator measuring method and measurement apparatus the invention discloses a kind of carbon fibre composite non-destructive lightning current includes pulse current generation power supply, pulse voltage and current sampling unit and computer measurement and control and analysis and processing unit.Pulse current occurs power supply and is made up of charhing unit, energy-storage units, discharge switch, waveform formation unit；Computer measurement and control is made up of with analytic unit programmable logic control unit, data acquisition unit or oscillograph and industrial control computer.Pulse voltage and the output of current sampling unit are gathered by collecting unit, and by the digital data transmission of collection to industrial control computer.By the discharge voltage for controlling energy-storage travelling wave tube, the pulse current passed through in one group of subject carbon fibre composite laminate and its corresponding pulse voltage value can be obtained, and then obtains the nonlinear wind vibration curve and nonlinear factor being tested under the effect of carbon fibre composite laminate non-destructive lightning current.
Description
Technical field
The invention belongs to the measurement that carbon fibre composite lightning current acts on lower impedance operator, more particularly to a kind of carbon fiber
The lower impedance operator measuring method of composite non-destructive lightning current effect and measurement apparatus.
Background technology
Carbon fibre composite had both had the characteristic such as low-density, high intensity, high-modulus, high temperature resistant, resistant to chemical etching, had again
There is the soft machinability of textile fabric, be widely used in the every field such as Aero-Space, military affairs and civilian industry.With aircraft
The improvement of design and the progress of carbon fibre composite technology, high purity carbon fiberreinforced polymer composites CFRP (Carbon
Fiber ReinforcedPolymers) dosage on Large Civil Aircraft, military aircraft, unmanned plane and stealth aircraft is continuous
Increase, from the dosage of CFRP on nineteen sixty McDonnell-Douglas Corporation DC-9 type less than 1%, to 2011 year end Boeing B787 main wing, tail
The wing, body, floor isostructural 50% are CFRP materials, it is contemplated that on the Air Passenger A350XWA of intermediate input operation in 2014
Ratio shared by CFRP materials reaches 53%.
Compare aluminium, steel and the titanium alloy material that tradition uses in aircraft, and CFRP electrical conduction performance is poor.In general,
The resistivity of CFRP layer plywood warp direction is 10-5Ω m magnitudes, the resistivity in transverse plane direction are 10-1Ω m magnitudes,
The resistivity of depth/thickness direction is bigger.This allows for CFRP layer plywood has like that in the case of thunderbolt without image of Buddha metal material
Having the short time to make, the electric charge of accumulation is shifted rapidly or the ability of diffusion, the energy of this part accumulation are caused in the form of Joule heat
CFRP temperature drastically raises, so as to cause the major injuries such as CFRP fibrous fracture, resin pyrolysis, Depth Stratification.
Since CFRP comes out, in terms of study hotspot just to be concentrated on to many scholars the research of its mechanical property, draw
Relationship schedule between mechanical shock parameter and CFRP tensile strength, incompressible intensity and damage field and lesion depths.
But thunder and lightning includes high-pressure shocking wave, magnetic field force and the joule heating effect of high current initiation to the direct effect of aircraft, because
This, there is greatest differences with mechanical shock damage for lightning damage effect of the thunder and lightning to carbon fibre composite laminate.The U.S.
Mobile engineering Shi Xiehui SAE, MILSTD MIL STD and European Civil Aviation tissue EUROCAE are to aircraft and its thunder of part
The test waveform and test method of electric direct effect have done specified in more detail, but carbon fibre composite laminate thunder and lightning direct effect
Test waveform and test method do not make stipulations.
The content of the invention
It is an object of the invention to provide a kind of carbon fibre composite non-destructive lightning current to act on lower impedance operator measurement
Method and measurement apparatus, to obtain C-V characteristic of the carbon fibre composite laminate under the effect of non-destructive lightning current, it is
The research of carbon fibre composite laminate thunder and lightning direct effect provides theoretical foundation.
The purpose of the present invention is achieved through the following technical solutions：
The lower impedance operator measurement apparatus of carbon fibre composite non-destructive lightning current effect of the present invention includes controllable thunder and lightning
Power supply, pulse voltage sampling unit, pulse current sampling unit, subject carbon fibre composite laminate and computer occur for stream
Observing and controlling and analytic unit；
One output end of power supply 1 occurs for described controllable lightning current and one end of subject carbon fibre composite laminate connects
Connect, the other end for being tested the other end and controllable lightning current the generation power supply of carbon fibre composite laminate is connected and connects reference
Ground, at the both ends of subject carbon fibre composite laminate and pulse voltage sampling unit is connected to, pulse current sampling unit set
It is connected on subject carbon fibre composite laminate with controllable lightning current to occur on the electric connection line of power supply low-pressure end, pulse voltage takes
The output of sample unit and pulse current sampling unit is connected with computer measurement and control with analytic unit.
Power supply, which occurs, for described controllable lightning current includes controllable charge power supply and the storage being connected in parallel in controllable charge power supply
Energy electric capacity, discharge switch and waveform formation component are in series with an output end of the controllable charge power supply of storage capacitor rear end.
Described computer measurement and control includes high-speed data acquisition unit, industrial control computer with analytic unit and may be programmed
The output end phase of sequence controller, wherein high-speed data acquisition unit and pulse voltage sampling unit and pulse current sampling unit
Even, programmable controller is connected with discharge switch.
The measuring method of the present invention is as follows：
1) subject carbon fibre composite laminate 4 is arranged between two electrodes 13,14 and in insert experiment loop；
2) experiment parameter under the non-destructive lightning current effect of input subject carbon fibre composite laminate 4, including rise
Initial pulse circuit current grade I1, terminate current class In, current class difference Δ I；
3) initial drain grade I of the computer measurement and control with analytic unit according to setting1, pass through high-speed data acquisition list
Member and programmable controller, control controllable lightning current that the controllable charge power supply in power supply occurs so that controllable lightning current occurs
Voltage on the storage capacitor of power supply is charged to corresponding to initial pulse circuit current grade I1Magnitude of voltage, next, calculate
Machine observing and controlling connects discharge switch with analytic unit control programmable controller, and the energy on storage capacitor passes through waveform formation
Component, by specified waveform, amplitude level I1Electric current flow through subject carbon fibre composite laminate；
4) pulse current for being tested the pulse voltage at carbon fibre composite laminate both ends and passing through passes through pulse voltage
Sampling unit and the extraction of pulse current sampling unit, and the high-speed data acquisition unit of computer measurement and control and analytic unit is transported to,
The data that pulse voltage sampling unit and pulse current sampling unit extract are passed through high speed number by computer measurement and control with analytic unit
Analog-to-digital conversion is carried out according to collecting unit, computer measurement and control carries out Data Analysis Services with analytic unit, obtains subject carbon fiber and answers
The voltage U at condensation material laminate both ends1And initial pulse circuit current grade I1Value；
5) continuing through computer measurement and control and analytic unit control programmable controller makes controllable lightning current that power supply 1 occur
Output voltage rise so that I is reached by the electric current for being tested carbon fibre composite laminate1During+Δ I, stop boosting, and
The analog quantity of now corresponding pulse voltage sampling unit and pulse current sampling unit is single with analysis by computer measurement and control
The high-speed data acquisition unit of member carries out data acquisition, is then passed to the industrial control computer of computer measurement and control and analytic unit
Data analysis is carried out, obtains electric current I2=I1+ the Δ I and voltage U at corresponding subject carbon fibre composite laminate both ends2；
6) repeat step 5), until reaching termination current class I by being tested the electric current of carbon fibre composite laminaten
Untill；
7) by obtain one group of current-voltage value (I1, U1)、(I2, U2)……(In, Un) connect can be obtained by by
Try the VA characteristic curve under the effect of carbon fibre composite laminate lightning current；
8) according to one group of obtained current-voltage value (I1, U1)、(I2, U2)……(In, Un), using NUMERICAL MATCH METHOD FOR
Obtain being tested lightning impulse dynamic electric voltage-current relationship expression formula of carbon fibre composite laminate.
The invention has the advantages that：
Pulse voltage of the present invention and the output of current sampling unit are gathered by high-speed data acquisition unit, and by the number of collection
Word signal is transferred to industrial control computer.By controlling the discharge voltage of energy-storage travelling wave tube, one group of subject carbon fiber can be obtained
The pulse current passed through in composite laminated plate and its corresponding pulse voltage value, and then obtain being tested carbon fibre composite
Nonlinear wind vibration curve and nonlinear factor under the effect of laminate non-destructive lightning current.
Brief description of the drawings
Fig. 1 is the composition frame chart of test device of the present invention；
Fig. 2 is that power supply composition frame chart occurs for the controllable lightning current of the present invention；
Fig. 3 is computer measurement and control of the present invention and analytic unit composition frame chart；
Fig. 4 is the present invention subject laminated method of plate installation of carbon fibre composite.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is described in further detail to the structural principle and operation principle of the present invention.
Referring to Fig. 1, test device of the invention includes controllable lightning current and power supply 1, pulse voltage sampling unit 2, arteries and veins occurs
Rush current sampling unit 3, subject carbon fibre composite laminate 4 and computer measurement and control and analytic unit 5.Controllable lightning current hair
One output end of raw power supply 1 is connected with being tested one end of carbon fibre composite laminate 4, and subject carbon fibre composite is laminated
The other end that power supply 1 occurs for the other end of plate 4 and controllable lightning current is connected and connects reference ground.It is meanwhile compound in subject carbon fiber
The both ends of material laminate 4 are simultaneously connected to pulse voltage sampling unit 2, and pulse current sampling unit 3 is socketed in subject carbon fiber and answered
Condensation material laminate 4 occurs with controllable lightning current on the electric connection line of the low-pressure end of power supply 1.Pulse voltage sampling unit 2 and pulse
The output of current sampling unit 3 is connected to computer measurement and control and analytic unit 5.
Referring to Fig. 2, power supply 1, which occurs, for described controllable lightning current includes controllable charge power supply 6 and is connected in parallel on controllable charging
Storage capacitor 7 on power supply 6, the He of discharge switch 8 is in series with an output end of the controllable charge power supply 1 of the rear end of storage capacitor 7
Waveform formation component 9.
Referring to Fig. 3, computer measurement and control and analytic unit 5 include high-speed data acquisition unit 10, the Industry Control meter connected
Calculation machine 11 and programmable controller 12, wherein high-speed data acquisition unit 10 and pulse voltage sampling unit 2 and pulse current
The output end of sampling unit 3 is connected, and programmable controller 12 is connected with discharge switch 8.
High-speed data acquisition unit 10 is that A/D converter reception comes from sampling voltage sampling unit 2 and sampling current unit 3
Signal, and by the voltage received, electric current analog-signal transitions into passing to computer measurement and control and analysis after data signal
Unit 5, computer measurement and control calculate the current signal by being tested carbon fibre composite laminate 4 with analytic unit 5
With the voltage signal at both ends.Meanwhile industrial control computer can also export analog signal control by programmable controller 12
The output voltage of power supply 1 occurs for system control lightning current.
Referring to Fig. 4, Aero-Space of the invention act on lower impedance operator with carbon fibre composite laminate lightning current
The installation method of the subject carbon fibre composite laminate of method of testing and test device includes following three kinds：Electrode water safety
Dress, electrode right angle setting and electrode are installed up and down.When electrode is horizontally mounted, the sense of current of test item is flowed through.
The measuring method of the present invention is as follows：
1) subject carbon fibre composite laminate 4 is arranged between two electrodes 13,14 and in insert experiment loop；
2) experiment parameter under the non-destructive lightning current effect of input subject carbon fibre composite laminate 4, including rise
Initial pulse circuit current grade I1, terminate current class In, current class difference Δ I；
3) inceptive impulse circuit current grade I of the computer measurement and control with analytic unit 5 according to setting1, pass through high-speed data
Collecting unit 10 and programmable controller 12, control controllable lightning current that the controllable charge power supply 6 in power supply 1 occurs so that can
The voltage that control lightning current occurs on the storage capacitor 7 of power supply 1 is charged to corresponding to initial pulse circuit current grade I1Voltage
Value, next, computer measurement and control controls programmable controller 12 to connect discharge switch 8 with analytic unit 5, storage capacitor 7
On energy by waveform formation component 9, by specified waveform, amplitude level I1Electric current flow through subject carbon fiber composite
Bed of material plywood 4；
4) pulse current for being tested the pulse voltage at the both ends of carbon fibre composite laminate 4 and passing through passes through pulse voltage
Sampling unit 2 and pulse current sampling unit 3 extract, and transport to the high-speed data acquisition list of computer measurement and control and analytic unit 5
Member 10, computer measurement and control leads to the data that pulse voltage sampling unit 2 and pulse current sampling unit 3 extract with analytic unit 5
Cross high speed data acquisition unit 10 and carry out analog-to-digital conversion, computer measurement and control and analytic unit 5 carry out Data Analysis Services, obtain by
Try the voltage U at the both ends of carbon fibre composite laminate 41And initial pulse circuit current grade I1Value；
5) continue through computer measurement and control controls programmable controller 12 to make controllable lightning current that electricity occur with analytic unit 5
The output voltage rise in source 1 so that I is reached by the electric current for being tested carbon fibre composite laminate 41During+Δ I, stop rising
Pressure, and by the analog quantity of now corresponding pulse voltage sampling unit 2 and pulse current sampling unit 3 by computer measurement and control with
The high-speed data acquisition unit 10 of analytic unit 5 carries out data acquisition, is then passed to the industry of computer measurement and control and analytic unit 5
Control computer 11 carries out data analysis, obtains electric current I2=I1+ Δ I and corresponding 4 liang of subject carbon fibre composite laminate
The voltage U at end2；
6) repeat step 5), until reaching termination current class by being tested the electric current of carbon fibre composite laminate 4
InUntill；
7) by obtain one group of current-voltage value (I1, U1)、(I2, U2)……(In, Un) connect can be obtained by by
Try the VA characteristic curve under the lightning current effect of carbon fibre composite laminate 4；
8) according to one group of obtained current-voltage value (I1, U1)、(I2, U2)……(In, Un), using NUMERICAL MATCH METHOD FOR
Obtain being tested lightning impulse dynamic electric voltage-current relationship expression formula of carbon fibre composite laminate 4.
Claims (4)
- A kind of 1. lower impedance operator measurement apparatus of carbon fibre composite non-destructive lightning current effect, it is characterised in that：Including It is compound that power supply (1), pulse voltage sampling unit (2), pulse current sampling unit (3), subject carbon fiber occur for controllable lightning current Material laminate (4) and computer measurement and control and analytic unit (5)；An output end and one end of subject carbon fibre composite laminate (4) of power supply (1) occur for described controllable lightning current Connection, the other end of subject carbon fibre composite laminate (4) are connected simultaneously with the other end of controllable lightning current generation power supply (1) Reference ground is connect, at the both ends of subject carbon fibre composite laminate (4) and is connected to pulse voltage sampling unit (2), pulse electricity Stream sampling unit (3) is socketed in subject carbon fibre composite laminate (4) and power supply (1) low-pressure end occurs with controllable lightning current On electric connection line, the output of pulse voltage sampling unit (2) and pulse current sampling unit (3) and computer measurement and control are single with analysis First (5) are connected.
- 2. the lower impedance operator measurement apparatus of carbon fibre composite non-destructive lightning current effect according to claim 1, It is characterized in that：Power supply (1), which occurs, for described controllable lightning current includes controllable charge power supply (6) and is connected in parallel on controllable charging electricity Storage capacitor (7) on source (6), it is in series with electric discharge in an output end of the controllable charge power supply (6) of storage capacitor (7) rear end and opens Close (8) and waveform formation component (9)；Controllable charge power supply (6) is by computer measurement and control and analytic unit (5) programme-control.
- 3. the lower impedance operator measurement apparatus of carbon fibre composite non-destructive lightning current effect according to claim 2, It is characterized in that：Described computer measurement and control includes high-speed data acquisition unit (10) with analytic unit (5), Industry Control calculates Machine (11) and programmable controller (12), wherein high-speed data acquisition unit (10) and pulse voltage sampling unit (2) and arteries and veins The output end for rushing current sampling unit (3) is connected, and programmable controller (12) is connected with discharge switch (8).
- A kind of 4. lower impedance of carbon fibre composite non-destructive lightning current effect in 1-3 such as claim as described in any one The measuring method of characteristic measuring device, it is characterised in that：1) subject carbon fibre composite laminate (4) is arranged between two electrodes (13,14) and in insert experiment loop；2) experiment parameter under the effect of input subject carbon fibre composite laminate (4) non-destructive lightning current, including starting Pulse current electric current grade I1, terminate current class In, current class difference Δ I；3) initial pulse circuit current grade I of the computer measurement and control with analytic unit (5) according to setting1, pass through high-speed data acquisition Unit (10) and programmable controller (12), control controllable lightning current that the controllable charge power supply (6) in power supply (1) occurs, make The voltage that controllable lightning current occurs on the storage capacitor (7) of power supply (1) is obtained to be charged to corresponding to initial pulse circuit current grade I1Magnitude of voltage, next, computer measurement and control and analytic unit (5) control programmable controller (12) make discharge switch (8) Connect, the energy on storage capacitor (7) is by waveform formation component (9), by specified waveform, amplitude level I1Electric current stream Cross subject carbon fibre composite laminate (4)；4) pulse current for being tested the pulse voltage at carbon fibre composite laminate (4) both ends and passing through is taken by pulse voltage Sample unit (2) and pulse current sampling unit (3) extraction, and the high-speed data for transporting to computer measurement and control and analytic unit (5) is adopted Collect unit (10), computer measurement and control and analytic unit (5) by pulse voltage sampling unit (2) and pulse current sampling unit (3) The data of extraction carry out analog-to-digital conversion by high-speed data acquisition unit (10), and computer measurement and control enters line number with analytic unit (5) According to analyzing and processing, the voltage U at subject carbon fibre composite laminate (4) both ends is obtained1And initial pulse circuit current grade I1 Value；5) continuing through computer measurement and control and analytic unit (5) control programmable controller (12) makes controllable lightning current that electricity occur The output voltage rise in source (1) so that I is reached by the electric current for being tested carbon fibre composite laminate (4)1During+Δ I, stop Only boost, and the now analog quantity of corresponding pulse voltage sampling unit (2) and pulse current sampling unit (3) is passed through into calculating Machine observing and controlling and the high-speed data acquisition unit (10) of analytic unit (5) carry out data acquisition, are then passed to computer measurement and control with dividing The industrial control computer (11) for analysing unit (5) carries out data analysis, obtains electric current I2=I1+ Δ I and corresponding subject carbon fiber The voltage U at composite laminated plate (4) both ends2；6) repeat step 5), until reaching termination current class I by being tested the electric current of carbon fibre composite laminate (4)nFor Only；7) by obtain one group of current-voltage value (I1, U1)、(I2, U2)……(In, Un) connect and can be obtained by subject carbon VA characteristic curve under the effect of fiber composite layer plywood (4) lightning current；8) according to one group of obtained current-voltage value (I1, U1)、(I2, U2)……(In, Un), obtained using NUMERICAL MATCH METHOD FOR It is tested lightning impulse dynamic electric voltage-current relationship expression formula of carbon fibre composite laminate (4).
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| CN109781786A (en) * | 2018-12-06 | 2019-05-21 | 西安交通大学 | Consider that the multiple continuous thunder and lightning flow component of carbon fibre composite nonlinear impedance acts on the multifactor appraisal procedure of lower thunder and lightning damage |
| CN109781777A (en) * | 2018-12-06 | 2019-05-21 | 西安交通大学 | Non-demolition thunder and lightning flow component acts on lower carbon fibre composite temperature characteristic measuring, calibration method and test macro |
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| CN105158572A (en) | 2015-12-16 |
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