CN107380481A - A kind of distribution grid structure damage check and repair system based on SMA silks - Google Patents
A kind of distribution grid structure damage check and repair system based on SMA silks Download PDFInfo
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- CN107380481A CN107380481A CN201710591970.7A CN201710591970A CN107380481A CN 107380481 A CN107380481 A CN 107380481A CN 201710591970 A CN201710591970 A CN 201710591970A CN 107380481 A CN107380481 A CN 107380481A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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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
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Transportation (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Aviation & Aerospace Engineering (AREA)
- Analytical Chemistry (AREA)
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Abstract
The present invention discloses a kind of distribution grid structure damage check and repair system based on SMA silks, it includes structural damage self-diagnosable system and structural damage self-repairing system, the structural damage self-diagnosable system is diagnosed to be structural damage position, and judges to need the shape-memory alloy wire heated；The structural damage self-repairing system heats to the shape-memory alloy wire, repairs structural strength.So, structural damage position is diagnosed to be using structural damage self-diagnosable system, and finds out repair coverage；Shape-memory alloy wire is heated using structural damage self-repairing system self-regeneration is carried out to damaged part, do not damage structure.
Description
Technical field
The present invention relates to the plate and shell structure that aircraft is common, and in particular to a kind of distribution grid structure based on SMA silks
Damage check and repair system.
Background technology
With the continuous improvement that every field is required with control structure design, many key structures or part are all reply
Burst is destroyed with influence of the fatigue damage to system safety as the important indicator for weighing design level.That in traditional structural design
Kind too by improving the safety coefficient of structure, reducing allowable load, the method for shortening active time, had both caused great wave
Take, the appearance for the accident that can not effectively avert a calamity again, have become and restrict numerous Aero-Space, civilian and military structural system enters
The bottleneck of one step development.
In view of drawbacks described above, creator of the present invention obtains the present invention finally by prolonged research and practice.
The content of the invention
To solve above-mentioned technological deficiency, the technical solution adopted by the present invention is：A kind of distribution grid based on SMA silks is provided
Formula structural damage detection and repair system, it includes structural damage self-diagnosable system and structural damage self-repairing system, the knot
Structure damnification self-diagnosis system is diagnosed to be structural damage position, and judges to need the shape-memory alloy wire heated；The structure
Damage self-repairing system heats to the shape-memory alloy wire, repairs structural strength.
Preferably, the structural damage self-diagnosable system includes global control system and partial control system, the overall situation
Control system detects integrally-built damage situations, and the partial control system is used for the damage situations for detecting partial structurtes.
Preferably, the global control system includes CPU, the CPU is used to receive the partial control system feedback
Partial structurtes corrupted information, and judge to need the shape-memory alloy wire heated.
Preferably, the partial control system includes resistance detecting circuit and digital analog converter (A/D), the resistance detection
Circuit is used to detect whether structure is damaged, and by the digital analog converter (A/D) by structural damage information transmission to described
CPU。
Preferably, the shape-memory alloy wire is arranged in parallel or in series in circuit.
Preferably, the structural damage self-repairing system includes digital I/O interfaces, relay and controllable current source, it is described
CPU is by the closure of relay described in the digital I/O Interface Controllers, and by the digital I/O interfaces by the relay
The signal of closure is transmitted to the CPU, and the CPU controls the controllable current source to power the shape-memory alloy wire and heated.
Preferably, the global control system also includes multiplexer, the multiplexer is by the CPU and at least
One partial control system is connected, and global control system is realized the detection to overall structure damage situations.
Preferably, the structural damage self-diagnosable system diagnosis is the damage situations for sensing track.
Preferably, grid and the SMA screen grids of the sensing track composition are formed upper and lower corresponding two layers.
Compared with the prior art the beneficial effects of the present invention are：Using structural damage self-diagnosable system be diagnosed to be structure by
Position is damaged, and finds out repair coverage；Shape-memory alloy wire is heated using structural damage self-repairing system to being damaged portion
Position carries out self-regeneration, does not damage structure.
Brief description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in various embodiments of the present invention
The accompanying drawing used is briefly described.
Fig. 1 is structural damage detection circuit；
Fig. 2 a are one of judgements of damage field；
Fig. 2 b are the two of the judgement of damage field；
Fig. 2 c are the three of the judgement of damage field；
Fig. 3 is the processing of reinforced region when many places are impaired；
Fig. 4 is SMA silk parallel driver circuits；
Fig. 5 is that tandem type SMA makees dynamic mesh；
Fig. 6 is tandem type SMA start grid node circuits.
Embodiment
Below in conjunction with accompanying drawing, the forgoing and additional technical features and advantages are described in more detail.
[structural damage self-diagnosable system]
Structural damage self-diagnosable system is due to unexpected load using the sensing grid being embedded in geodesic structure is treated monitoring in real time
The change of configuration state or Stress distribution caused by lotus acts on or damaged, and using the position of resistance detection identification of damage；
It includes global control system and partial control system；
Global control system is global comprehensive monitoring, diagnosis control center, and it provides impaired according to partial control system
Information monitoring global structure state, global detection control system 1 include CPU11, multiplexer 12 and analog-digital converter (D/A)
13, CPU11 control detection entire infrastructure compromise states, multiplexer 12 are connected with multiple partial control systems, to examine
The damage situations for the every sensing track 21 surveyed are transmitted to CPU；CPU11 receives the impaired biography that digital analog converter (A/D) 23 is sent
Feel track signal, calculate optimum control gain, it is determined that the shape that the needs corresponding with impaired sensing track 21 are repaired is remembered
Recall B alloy wire scope.After carrying out signal conversion by analog-digital converter (D/A) 13, find needs corresponding to impaired sensing track 21
The shape-memory alloy wire scope to be repaired, makes global structure intensity or best performance；
Partial control system 2 is used to detect partial structurtes performance state, and it includes sensing track 21, marmem
Silk 22, digital analog converter (A/D) 23 and resistance detecting circuit 24, sensing track 21 is a kind of transmission line, when structural damage,
Being fitted in the sensing track 21 of body structure surface can be also damaged, and the damage situations of track 21 are sensed by detecting, it is known that
Damaged structure position corresponding with impaired sensing track 21, shape-memory alloy wire 22 shrink when heating, shape memory are closed
The embedment of spun gold 22 treats in geodesic structure that heated shape memory alloy silk 22 can send out the structure organization around shape-memory alloy wire 22
Raw phase transformation, repair damaged structure tissue, and the grid that the grid of the composition of shape-memory alloy wire 22 forms with sensing track 21
It is corresponding, detect the position of impaired sensing track 21, so that it may know the shape-memory alloy wire that corresponding needs heat
22 scope；The impaired letter of sensing track for detecting resistance detecting circuit 24 after the change data of digital analog converter (A/D) 23
Breath is transmitted to CPU11；
Fig. 1 is a kind of application of partial control system, is a kind of sensing for being used for detection sensing track 21 and whether damaging
Circuit, it includes digital analog converter (A/D) 23 and resistance detecting circuit 24 and CPU11, and resistance detecting circuit 24 will detect
Sensing track 21 has the information of damage by being transmitted to CPU11, resistance detecting circuit after the change data of digital analog converter (A/D) 23
24, which include 241, four identicals of detection voltage, switchs 242, four diodes 243 and resistance 244, detects voltage 241 during work
Power supply, four switches 242 close successively, and four diodes 243 turn on, if sensing track 21 can detect without being damaged
Pressure drop onto resistance 244, otherwise the pressure drop on resistance 244 is zero, if pressure drop is zero, digital analog converter (A/D) 23 will
Information is transmitted to CPU11, and CPU11 will judge a repair coverage further around affected area；
Partial control system is desirably integrated into microminiature or the medium-sized digital-to-analog hybrid circuit of key area.
[determination of affected area scope]
Judge that (this damage range is i.e., it is necessary to do a judgement to impaired scope after damaged location using the above method
It is the region for needing to strengthen) drive SMA silks to strengthen it to control.The sensing track of transverse and longitudinal arrangement is carried out respectively
Numbering (SMA silks numbering corresponds to identical therewith), horizontally-arranged to be represented with H, tandem is represented with V, convenient to be compiled by impaired sensing track
Number, derive that marmem adjacent around (SMA) silk is numbered, as shown in Fig. 2 a, Fig. 2 b and Fig. 2 c.
When individual thread (being not net boundary) is impaired, we can be sentenced using minimum envelop method to damage field
Disconnected, as shown in Figure 2 a, H11 damages, then affected area is in the region of H02, H22, V01, V02, V11, V12 envelope.Correspond to not
The region strengthened with the damage needs of position is as shown in table 1；Border silk is damaged as special circumstances, as shown in Figure 2 b, shape memory
B alloy wire is unable to envelope damage field, and the region that it is strengthened is as shown in table 1；When multi-filament is damaged, we can be first to each
The impaired silk minimum envelop method of root makees to judge successively, and then comprehensive descision goes out affected area, such as Fig. 2 c, is damaged by V01, judges
Go out affected area in the region of H00, H01, H10, H11, V00, V02 envelope, by V02 damage judge affected area by
In the region of H01, H02, H11, H12, V01, V03 envelope, and actual V01, V02 have been damaged, so as to comprehensive descision go out it is impaired
Region is in the region of H00, H01, H02, V03, H12, H11, H10, V00 envelope.
The judgement of the damage field of table 1
The border of above-mentioned damage field is also the region that SMA silks need to strengthen.Particularly work as many places position impaired 1, such as
Shown in Fig. 3, in addition to strengthening damaged part 2, neighboring area 3 can also be strengthened as needed, to ensure that global optimum's structure is strong
Degree or performance.
[structural damage self-repairing system]
The function of self-repairing system is on the basis of damnification self-diagnosis, and corresponding driving element is triggered by logic control
Action, improve the Stress distribution in structure, reduce maximum stress, atraumatic extension.Using marmem
(SMA) as the reparation element in intelligence structure.SMA silks can be such that 6%~8% plastic deformation recovers completely in free state,
If recovery of shape suffers restraints, 300MPa recovery stress may produce up to.
It (is Ovshinsky by martensite transfor mation that traditional marmem actuation techniques, which need electric current driving resistance sensing heating,
Body).But this method is slower, and static or quasistatic is only applicable to, excessive electric current often burns shape note
Recall material and damage body.This patent proposes a kind of new SMA driving control systems, and the system has heating and resistance detection
Circuit, optimal current can be provided for any given shape SMA silks, to realize maximum driveability and reliability.Therefore, tie
Structure infringement can be controlled or compensated in time.
It is in the difference of connection in series-parallel relation in circuit according to shape-memory alloy wire during driving, it is proposed that two kinds different
Drive circuit.
1st, parallel driver circuit
Parallel driver circuit is to be connected in circuit in the shape-memory alloy wire heated needed for heating repairing phase, structure
Damage self-repairing system 3 is combined with global structure damnification self-diagnosis system 1 and local structural damage self-diagnosable system 2, is being tied
Structure damnification self-diagnosis system closes after being diagnosed to be impaired sensing track and specific reinforcement shape-memory alloy wire to shape memory
Spun gold is heated, concrete structure as shown in Figure 4 the SMA silks of arrangement (only depicted in figure parts transversely), it include power supply 31,
Relay 32, shape-memory alloy wire 33, switch 34 and digital I/O interfaces, the corresponding control heating per SMA silks 33 all the way
The analog switch 34 of the relay (SW1~SWn) 32 of electric current and a control detection voltage.Structural damage detection system detectio goes out
After damage position and judging needs the SMA silks of electrified regulation, CPU11 adjusts the output electricity of controllable current source 31 as needed
Stream, while corresponding SWi32 is closed, electric current adds to SMA silks 33 and heated.After a period of time, SWi is disconnected, and corresponding STi is closed
Close, apply measurement voltage, again the detection sensing damage situations of track 21, sense the impaired detection of track 21 in a word and to shape
Memory alloy wire heats alternately.Now, the terminal voltage Vt of SMA silks one is fixed by voltage-regulator diode and is considered as, it is known that A/D converter
23 read pressure drop Vs on sampling resistor Rs246, obtain the resistance values of SMA this moment according to Ohm's law, i.e.,：
R=Rs (Vt-Vs)/Vs
Then, its relative change rate, i.e. Δ R/R Δs t are calculated then, this relative change rate can be as judging marmem
The foundation whether silk phase transformation is completed.
Parallel driver circuit has advantage easy to control simple in construction, but because every shape-memory alloy wire is in parallel
In circuit, cause main road heated current excessive, bring inconvenience.Again because the resistance of every shape-memory alloy wire can not be ensured
It is identical, so heated current size on every silk and differing, so their phase transformation process is also inconsistent.Therefore, this is special
Profit has also been proposed another drive circuit --- tandem drive circuit.
2nd, tandem drive circuit
Tandem drive control circuit is to be connected on electricity in marmem (SMA) silk heated needed for heating repairing phase
Lu Zhong.The SMA silks of tandem drive circuit make dynamic mesh as shown in figure 5, node circuit is as shown in Figure 6.Have at each node
Two leads are connected respectively to horizontal and vertical marmem (SMA) silk, to each marmem (SMA) silk,
Each node and node lead are numbered.
After structural damage detection system detectio goes out the SMA silks that damage position and judging needs electrified regulation, the driving of SMA silks
Marmem (SMA) silk for needing to heat can be together in series by the break-make of relay at control system control node, to it
Carry out electrified regulation.
The damaged condition as shown in Figure 5 such as Flight Vehicle Structure appearance, damage detection system will be sentenced by upper one section methods described
Break several marmems of H11, H12, H13, V14, H23, V23, H32, V22, H21, V11 (SMA) silk need be powered plus
After heat, SMA silk driving control system control node (1,1) place lead connects power supply and ground connection respectively, node (Isosorbide-5-Nitrae), node (2,
4), node (2,3), node (3,3), node (3,2), node (2,2), the lead short circuit of node (2,1) place two are (due to V12, V13
Damage and Fracture, node (1,2), whether short circuit does not influence node (1,3) place lead on circuit), i.e. relay SWa11,
SWc11, SWb14, SWb24, SWb23, SWb33, SWb32, SWb22, SWb21 are closed.The guiding of electric current relay at node
Under path dynamic mesh will be made by SMA as illustrated, corresponding marmem (SMA) silk is heated.And work as node
The lead of (1,1) place two is not to be connected on heating power supply both ends but connect detection voltage respectively and during sampling resistor, then can be by foregoing
Method detects the resistance change rate of marmem (SAM) silk, using as judging whether shape-memory alloy wire phase transformation is completed
Foundation.It is excessive that the drive circuit of tandem type solves parallel driver circuit main road electric current, and phase transformation process is inconsistent asks
Topic.
Presently preferred embodiments of the present invention is the foregoing is only, is merely illustrative for the purpose of the present invention, and it is non-limiting
's.Those skilled in the art understands, many changes can be carried out to it in the spirit and scope that the claims in the present invention are limited,
Modification, in addition it is equivalent, but fall within protection scope of the present invention.
Claims (9)
1. a kind of distribution grid structure damage check and repair system based on SMA silks, it is characterised in that it includes structure damage
Hinder self-diagnosable system and structural damage self-repairing system, the structural damage self-diagnosable system is diagnosed to be structural damage position, and
Judge to need the shape-memory alloy wire heated；The structural damage self-repairing system is carried out to the shape-memory alloy wire
Heating, repair structural strength.
2. distribution grid structure damage check and repair system according to claim 1 based on SMA silks, its feature exist
In the structural damage self-diagnosable system includes global control system and partial control system, the global control system detection
Integrally-built damage situations, the partial control system are used for the damage situations for detecting partial structurtes.
3. distribution grid structure damage check and repair system according to claim 2 based on SMA silks, its feature exist
In the global control system includes CPU, and the partial structurtes that the CPU is used to receive the partial control system feedback are damaged
Information, and judge to need the shape-memory alloy wire heated.
4. distribution grid structure damage check and repair system according to claim 3 based on SMA silks, its feature exist
In the partial control system includes resistance detecting circuit and digital analog converter (A/D), and the resistance detecting circuit is used to detect
Whether structure is damaged, and gives structural damage information transmission to the CPU by the digital analog converter (A/D).
5. the distribution grid structure damage check and repair system based on SMA silks according to claim 1 or 4, it is special
Sign is that the shape-memory alloy wire is arranged in parallel or in series in circuit.
6. distribution grid structure damage check and repair system according to any one of claims 1 to 4 based on SMA silks,
Characterized in that, the structural damage self-repairing system includes digital I/O interfaces, relay and controllable current source, the CPU leads to
The closure of relay described in the digital I/O Interface Controllers is crossed, and closed the relay by the digital I/O interfaces
Signal is transmitted to the CPU, and the CPU controls the controllable current source to power the shape-memory alloy wire and heated.
7. distribution grid structure damage check and repair system according to claim 6 based on SMA silks, its feature exist
Also include multiplexer in, the global control system, the multiplexer is by the CPU and at least one part
Control system is connected, and global control system is realized the detection to overall structure damage situations.
8. distribution grid structure damage check and repair system according to claim 7 based on SMA silks, its feature exist
In the structural damage self-diagnosable system diagnosis is the damage situations for sensing track.
9. distribution grid structure damage check and repair system according to claim 8 based on SMA silks, its feature exist
Formed upper and lower corresponding two layers in grid and the SMA screen grids of, the sensing track composition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710591970.7A CN107380481A (en) | 2017-07-19 | 2017-07-19 | A kind of distribution grid structure damage check and repair system based on SMA silks |
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| CN201710591970.7A CN107380481A (en) | 2017-07-19 | 2017-07-19 | A kind of distribution grid structure damage check and repair system based on SMA silks |
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Cited By (2)
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| CN113567282A (en) * | 2021-06-03 | 2021-10-29 | 上海交通大学 | Object type judgment processing method and system based on shape memory alloy wire |
| DE102021106543A1 (en) | 2021-03-17 | 2022-09-22 | Vega Grieshaber Kg | Sensor with a wire comprising shape memory material, device for detecting buildup and/or mechanical action on a sensor, method for detecting buildup and/or mechanical action on a sensor |
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Cited By (3)
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| DE102021106543A1 (en) | 2021-03-17 | 2022-09-22 | Vega Grieshaber Kg | Sensor with a wire comprising shape memory material, device for detecting buildup and/or mechanical action on a sensor, method for detecting buildup and/or mechanical action on a sensor |
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| CN113567282B (en) * | 2021-06-03 | 2022-06-17 | 上海交通大学 | Object type judgment processing method and system based on shape memory alloy wire |
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