阅读说明：本技术 一种复合材料结构冲击损伤评测及自动修复系统 (A kind of evaluation and test of composite structure impact injury and it is automatically repaired system ) 是由 孙凌玉 韩军 何壮壮 王金玺 于 2019-08-13 设计创作，主要内容包括：本发明涉及复合材料结构损伤监测领域,旨在提供一种复合材料结构冲击损伤监测及自动修复系统,它包括导电碳纤维复合材料监测层、电碳纤维复合材料修复层、连接节点、导线、电源、电信号采集模块、损伤识别模块、智能修复模块、电流发生模块；导电碳纤复合材料监测层中的连接节点通过导线与电信号采集模块以及电源相连；损伤识别模块依据电信号采集模块的信息进行解析；智能修复模块依据解析结果判别是否进行损伤修复；电流模块根据修复指令为修复层提供大电流使损伤部位软化进而修复裂纹；本发明在预测损伤程度以及损伤定位的同时依据损伤程度对结构进行精确修复,保证了复合材料结构的安全性,也提高了复合材料结构的服役年限,降低维护成本。(The present invention relates to composite structure damage monitoring fields, it is intended to provide a kind of monitoring of composite structure impact injury and is automatically repaired system, it includes that module occurs for conductive carbon fibre composite material monitor layer, electric carbon fiber composite repair layer, connecting node, conducting wire, power supply, electrical signal collection module, non-destructive tests module, intelligent repair module, electric current；Connecting node in conductive carbon fibres composite material monitor layer is connected by conducting wire with electrical signal collection module and power supply；Non-destructive tests module is parsed according to the information of electrical signal collection module；Intelligent repair module discriminates whether to carry out injury repair according to parsing result；Current module, which provides high current according to reparation instruction for repair layer, makes damage location softening and then repair crack；The present invention accurately repairs structure according to degree of injury while predicting degree of injury and damage reason location, ensure that the safety of composite structure, also improves the Years Of Service of composite structure, reduces maintenance cost.)

1. a kind of conductive composite material structure impacts repair system, it includes conductive carbon fibre composite material monitor layer, conductive carbon Mould occurs for fibrous composite repair layer, power supply, electrical signal collection module, non-destructive tests module, intelligent repair module, electric current Block；

The conductive carbon fibre composite material monitor layer is for monitoring electric signal caused by external impact；

The conductive carbon fibre composite repair layer is used to repair the crackle of structure specified location；

The electrical signal collection module is used to acquire and handle the electric signal of conductive carbon fibre composite material monitor layer；

The non-destructive tests module is for evaluating and testing degree of injury and mode；

The reparation that the intelligence repair module is used to provide respective degrees according to degree of injury instructs, and electric current occurs module and is used for Designated position generates corresponding reparation electric current.

2. conductive carbon fibre composite material monitor layer according to claim 1, it is characterised in that carbon fiber is by external force Its resistance changes and then leads to the variation of electric signal when impact, has good mechanical resistance characteristic.

3. conductive carbon fibre composite material monitor layer according to claim 2, it is characterised in that choosing carbon fiber laying is 0 degree With 90 degree of carbon fibers as monitoring node, and then constitutes latticed monitoring layout and realize accurate positioning.

4. conductive carbon fibre composite repair layer according to claim 1, it is characterised in that carbon fiber is by external force Its resistance significantly increases when impact.

5. conductive carbon fibre composite repair layer according to claim 4, it is characterised in that be powered to damage position Fluently thermoplastic matrix is set to have certain melt to repair fine cracks in turn with its high resistance heat production.

6. conductive carbon fibre composite repair layer according to claim 5, it is characterised in that choosing carbon fiber laying is 0 degree With 90 degree of carbon fibers as monitoring node, and then constitutes latticed monitoring layout and realize accurate repair.

7. non-destructive tests module according to claim 1, it is characterised in that according to conductive carbon fibre composite material monitor layer Each node signal and damage data library compare to obtain degree of injury and type.

8. intelligence repair module according to claim 1, it is characterised in that carried out according to damage information and repair data library Comparison provides corresponding reparation duration, electric current and location information.

9. intelligence repair module according to claim 8, it is characterised in that according to the damage for repairing position in repair process The variation of signal adjusts corresponding reparation command information in real time, guarantees repairing effect while economizing on resources.

Technical field

The present invention relates to composite structure damage monitoring fields more particularly to a kind of composite structure impact injury to supervise Survey and be automatically repaired system.

Background technique

Important channel one of of the condensation material as automobile lightweight, at present in the interior trim part of automobile and structure Etc. structures have relatively broad application.Composite structure is in use since external impact can make its internal generation Fine crack damage, it is generally difficult to pass through the presence or absence of naked eyes judgement damage and specific position.When being produced in composite structure After raw fine crack, overall performance can accelerate decaying and even fatigue rupture occurs, therefore finds in time and repair fine crack Important in inhibiting.Traditional non-destructive monitoring method is such as: monitoring ultrasonic, acoustic emission monitor(ing), ray monitoring, magnetic powder monitoring and Colour developing monitoring etc..Although these methods in practice have preferable monitoring accuracy, cannot achieve in real time on-line monitoring with And the quick positioning of damage, monitoring efficiency is lower and high expensive.

For carbon fiber as the reinforced phase in composite material, density is small and there is high specific strength and specific modulus to have simultaneously Good electric conductivity.Thermoplastic resin matrix is since it is with good recyclability, in the carbon fiber composite of automobile It is had a wide range of applications in material.The composite laminated plate that carbon fiber is prepared into thermoplastic matrix will have in future preferably answers With prospect, while the carbon fiber as reinforced phase has certain conductive capability again.Based on the compound of thermoplastic carbon fiber matrix Material laminate proposes a set of effective, quick and inexpensive impact injury monitoring and is automatically repaired system and has widely to answer With value.

Summary of the invention

1, goal of the invention:

The object of the invention is exactly to overcome defect existing for conventional lossless monitoring technology, is proposed a kind of multiple with real-time monitoring It condensation material structural impact damage position and degree and carries out being automatically repaired system.

2, technical solution:

A kind of monitoring of composite structure impact injury and it is automatically repaired system, it includes conductive carbon fibre composite material prison Survey layer, conductive carbon fibre composite repair layer, connecting node, conducting wire, power supply, electrical signal collection module, non-destructive tests module, Module occurs for intelligent repair module, electric current.

The conductive carbon fibre composite material monitor layer is fiber with 0 degree and 90 degree of laying layer, can structure using this two layers At the latticed determination for realizing impact position.

The conductive carbon fibre composite repair layer is the middle layer of laminate.

The connecting node is to be attached several carbon fibers using conductive sheet, and conducting can be realized using this kind of method Carbon fiber formed in the plane coordinate system realize damage reason location.

The conducting wire is connection conductive sheet and signal collecting device.

The power supply is DC power supply.

The electrical signal collection module is electric signal of the acquisition from each node.

The non-destructive tests module carries out dissection process according to the information that the electrical signal collection module transmits.

The intelligence repair module provides reparation instruction according to the result decision of the non-destructive tests module.

Module occur for the electric current receive to generate corresponding high current to described from the instruction of the intelligent repair module Conductive carbon fibre composite repair layer repaired, resistance heating power, which is mainly utilized, makes thermoplastic matrix have certain journey Fine crack healing is realized in the melting of degree.

A kind of monitoring of composite structure impact injury and it is automatically repaired system, comprising the following steps:

Step 1, in composite laminated plate preparation process in its carbon fiber in 0 degree of fibrous layer with 90 degree of layings Laying conduction synusia is as conducing composite material monitor layer at certain intervals；

Step 2, in composite laminated plate preparation process in its carbon fiber in 0 degree of fibrous layer with 90 degree of layings Laying conduction synusia is as conducing composite material repair layer at certain intervals；

Step 3 builds complete damage by completing the connection of Each part after step 1 and step 2 by conducting wire Wound monitors and is automatically repaired system.

Step 4 is completed at monitoring and the initialization of repair system after energization according to the basic size of composite structure Reason.

3, the present invention " a kind of monitoring of composite structure impact injury and be automatically repaired system ", advantage is as follows:

(1) present invention proposes to be based on carbon fibre composite itself, completes damage prison using the conductive characteristic of carbon fiber The function of surveying and repair, saves cost while also simplifying structure type；

(2) present invention utilizes Composite Laminated Panel feature, chooses the laying laying conductive sheet of 0 degree with 90 degree Realize the determination of impact position, this kind of positioning method is simple and accurate；

(3) present invention utilizes the power electrical characteristics of carbon fiber, and the size of impact can be evaluated and tested according to the variation degree of electric signal, Judgement for degree of injury.

(4) using carbon fibre composite, its internal resistance becomes larger after generating impact injury, can be with according to being accurately positioned Realize the accurate reparation of damage.

(5) monitoring of very good solution of the present invention conventional lossless cannot achieve real-time monitoring and what damage quickly positioned lacks Point, while realizing to have damaged using composite structure characteristic and be automatically repaired, largely reduce fatigue damage Occur while reducing monitoring cost.

Detailed description of the invention

Fig. 1 is that System Working Principle schematic diagram is evaluated and tested and be automatically repaired to composite structure impact injury.

Symbol description is as follows in figure:

1- power supply, 2- conductive carbon fibre composite material monitor layer, 3- electrical signal collection module, 4- non-destructive tests module, 5- Module, 7- conductive carbon fibre composite repair layer occur for intelligent repair module, 6- electric current.

Specific embodiment

To facilitate the understanding of the present invention, below in conjunction with attached drawing 1 and specific embodiment, the present invention is described in detail.Attached drawing In give the general embodiment of the present invention.The implementation case according to the present invention implemented by technical solution, gives system Working principle, but protection scope of the present invention is not limited to following embodiments.

All technical and scientific terms used in the present invention those skilled in the art of the invention with term are usual The meaning of understanding is identical.Term is used in order to describe specific embodiment in the description of the invention herein, not office It is limited to the present invention.

The present invention provides a kind of evaluation and test of conductive composite material structure impact injury and it is automatically repaired system, it is multiple for solving The positioning of condensation material structural impact damage and degree are evaluated and tested, to find position and the degree of impact injury in time.For damage The lower impact condition of degree, the system can realize that the function that exact position is automatically repaired improves safety of structure and also reduces Maintenance cost.

As shown in Figure 1, provided in case study on implementation of the present invention a kind of evaluation and test of conductive composite material structure impact injury and from Dynamic repair system, including power supply 1, conductive carbon fibre composite material monitor layer 2, electrical signal collection module 3, non-destructive tests module 4, Module 6 and conductive carbon fibre composite repair layer 7 occur for intelligent repair module 5, electric current.

Specifically, power supply 1 is the normal work that the various pieces in this example are powered to guarantee whole system；Conductive carbon fibres Dimension composite material monitor layer 2 is located at the middle layer of composite structure, when being used for real-time monitoring external impact, when damage occurs When, change in electric that conductive carbon fibre composite material monitor layer 2 can produce；Electrical signal collection module 3 receives simultaneously in real time The electric signal from conductive carbon fibre composite material monitor layer 2 is handled, treated, and signal is transferred to non-destructive tests module 4；Damage Hurt identification module 4 and information and is compared with preset non-destructive tests database based on the received and provide corresponding damage Degree and type；Intelligent repair module 5 receive the degree of injury signal from non-destructive tests module 4 and with preset repair data Library compares and analyzes, and provides corresponding instruction to electric current of repairing and module 6 occurs；Electric current occurs module 6 and repairs mould according to intelligence The reparation of block 5 specifies to conductive carbon fibre composite repair layer 7 and inputs the electric current of fixed duration for repairing damage；It repaired Cheng Zhong, conductive carbon fibre composite material monitor layer 2 also constantly monitoring electric signal variation, the signal through non-destructive tests module 4 into Damage signal is reached into intelligent repair module 5 after row evaluation and test, intelligent repair module 5 is carried out according to damage signal and repair data library Comparison is for evaluating and testing the effect repaired.

The signal acquisition of 2 grid type of conductive carbon fibre composite material monitor layer can be very good to realize positioning simultaneously according to reality The spacing for the monitoring accuracy reasonable Arrangement collection point that border requires.

Electrical signal collection module 3 receives the signal of each collection point, and the position for being handled to obtain impact injury to signal is believed Number and electric signal fluctuation characteristic.

Non-destructive tests module 4 is compared according to the electric signal fluctuation characteristic received and its existing damage data library, The degree and type for evaluating and testing damage also receive damage position information simultaneously.

Intelligent repair module 5 is compared according to the degree of injury and type received and its existing repair data library, Provide corresponding reparation duration, electric current and location information.

Electric current occurs module 6 and generates corresponding high current to conductive carbon fibre according to the command information of intelligent repair module 5 The corresponding position of composite repair layer 7, using electric current specific position heat production heating thermoplastic collective, to complete small split The reparation of line.

In repair process, there are the processes of a feedback regulation, imitate according to the variation for repairing position electric signal to reparation Fruit is evaluated and tested in real time, then stops repairing in advance precisely repairing to reach after achieving the effect that the reparation degree section of setting.