CN103868704A - Distributive multifunctional structure state detection system - Google Patents
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- CN103868704A CN103868704A CN201410077875.1A CN201410077875A CN103868704A CN 103868704 A CN103868704 A CN 103868704A CN 201410077875 A CN201410077875 A CN 201410077875A CN 103868704 A CN103868704 A CN 103868704A
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Abstract
The invention provides a distributive multifunctional structure state detection system, which comprises a large-scale expandable sensor network carrying layer, a nanometer/micrometer-scale function device, a carrier film and a multifunctional sensor information processing sub system, wherein the carrier film integrates a sensor network and a structure. The distributive multifunctional structure state detection system has the advantages that the structure and function integration can be realized, so the future structure can be designed and manufactured to realize multifunction such as the active and passive monitoring function, the multi-information obtaining intelligent sensing function and the environment applicability. The distributive multifunctional structure state detection system provided by the invention has the capability of automatically collecting, processing and analyzing data, and can realize important effects in the all life cycle of aircraft structure design and manufacturing, service and maintenance.
Description
Technical field
The present invention relates to structural health monitoring technology field, particularly a kind of distributed multifunctional configuration state detection system.
Background technology
The health monitoring technology of Flight Vehicle Structure has been regarded as in International Civil Aviation field ensureing and has used in a large number and improve aircraft reliability, reduces the gordian technique of maintenance cost, is an important development direction of following airliner.Along with the development of structural health monitoring technology, carry out the qualitative monitoring of single, local off-line by original comparatively simple, a small amount of sensor and develop into more complicated, comprehensive, real-time, quantitative monitoring.There are a lot of shortcomings in traditional sensor network system and subsidiary network hardware equipment, makes them be not suitable for being affixed to Flight Vehicle Structure in a large number and it does not impacted.Particularly, traditional sensors and network components size are large, will affect intensity and the life-span of structure if imbedded in interlayer; Additional weight is by the high specific strength advantage weakening; The installation of tradition sensor-based system, integratedly also will expend a large amount of manpowers, application cost is high; Want the health status of comprehensive large-area monitoring aircraft need to lay a large amount of sensing elements, also will introduce more additional materials, the weight of additional materials and the impact that structure is caused.Therefore need to develop a kind of more lightweight, flexibility, easy to operate, the sensor network that can large area covers, be applicable to imbedding aircraft.
Summary of the invention
1. object of the present invention: proposing can extension sensor network with the large-sized multifunction of structure assembly one, form a kind of sensing technology new ideas with multi-mode sensing function, implementation structure-function integration, can be designed following structure and is made into that to have intelligent sensing function, environmental suitability etc. multi-functional.Proposed by the invention multi-functional can extension sensor network equally can be for metal construction.Propose to carry layer with sensor and function element on integrated polytype Nano/micron yardstick by the sensor network of extensibility, thereby realize network multifunction and can embedding, overcome function singleness, the macrostructure unworthiness of existing structure health monitoring systems and be not suitable for the inner shortcoming that continues perception of embedded structure.The distributed multifunctional configuration state detection system that the present invention proposes possesses automatic collection, processes and analyze the ability of data, in the life cycle management of Aircraft structural design and manufacture, military service and maintenance, can both play an important role: in (1) optimal design in structure, improve structural design allowable value; (2) can improve manufacturing process and structural life-time management and maintenance program; (3) can provide the real-time health and fitness information of structure, may the losing efficacy of predict; (4) provide aircraft ACTIVE CONTROL and certainly safeguard required real-time configuration state information.For implementation structure one function integration and the management of integrated structural health provide important basis and technical guarantee.
2. technical scheme: in order to achieve the above object, the invention provides a kind of distributed multifunctional configuration state detection system, comprise and can carry required carrier film and Multifunction Sensor information processing subsystem in layer, function components and parts, sensor network sticking structure surface or embedded structure process by extension sensor network, wherein:
The described layer that can extension sensor network carries, thus carry out large-area configuration state detection and as the signal transmission network between function element for integrated a large amount of multi-modes, multi-functional function components and parts;
Described function components and parts change and transmission/processing signals for generation of the physical quantity of pumping signal, monitoring of structures;
Described carrier film is used for sensor network sticking structure surface or the corresponding position of embedded structure;
The dissimilar data stream that described Multifunction Sensor information processing subsystem sends for receiving and resolve multi-mode sensory perceptual system, and carries out configuration state information fusion, and health status based on information fusion evaluation of result structure.
In distributed multifunctional configuration state detection system of the present invention, described can extension sensor network lift-launch layer be the network being made up of the micro-node connecting by micro-line.
In distributed multifunctional configuration state detection system of the present invention, can in wired sensing situation, can be metallized as wire and use by extension sensor network lift-launch layer.
In distributed multifunctional configuration state detection system of the present invention, described can extension sensor network lift-launch layer material be flexible macromolecule polymkeric substance.
In distributed multifunctional configuration state detection system of the present invention, described function element comprises sensing/exciting element, power amplifier, signal generator and signal processor;
Described sensing/exciting element comprises piezoelectric sensor, temperature sensor, smart coat, foil gauge or comparison vacuum transducer;
Described function element is Nano/micron level functional unit, for can extension sensor network carry the mutually integrated formation Multifunction Sensor network of layer, configuration state is carried out to omnibearing monitoring, required various sensing datas are provided.
In distributed multifunctional configuration state detection system of the present invention, described carrier film is flexible macromolecule polymer film layer, for laying the sensor network nodes position after transition change and the dilatation of sensor network from micro-scale to macro-scale.
In distributed multifunctional configuration state detection system of the present invention, described Multifunction Sensor information processing subsystem comprises multiple information processing subsystems, the data of each subsystem processes same type, and the Output rusults of multi-mode sensing layer different disposal subsystem is reanalysed to the health status with analytic structure.
In distributed multifunctional configuration state detection system of the present invention, that described information processing subsystem comprises is active, passive type detection algorithm, algorithms of different are integratedly checked with stability, data management system framework.
The present invention proposes a kind of based on large-scale distributed multifunctional configuration state detection system that can extension sensor network, can carry out real-time, online configuration state monitoring to structure.Main thought is, the sensor, signal generator, processor etc. with various functions carried to layer by pliable and tough a scalable network and carry out integratedly, and pastes body structure surface or is embedded in structure.When physical quantity in structure changes, thereby by the variation of monitor signal, the damage and the expansion etc. that occur in structural external impact and may be present in structure are carried out efficiently to Real-Time Monitoring comprehensively.Distributed multifunctional configuration state detection system has automatic collection, processes and analyze the ability of polymorphic type sensing data, can real-time characterization constructional aspect and integrality.Maintenance based on state will replace traditional regular sequencing inspection, and the damage that this can not only find appearance in time, can help again to improve technique and structural life-time administers and maintains program.And then increase aircraft safety, reduce operation, maintenance cost.In aeroplane structure design, can also improve structural design allowable value.Therefore, distributed multifunctional configuration state detection system all will play a significant role in aircaft configuration (particularly aircaft configuration) life cycle management.
3. of the present invention have following technique effect based on large-scale distributed multifunctional configuration state detection system that can extension sensor network:
(1) the integrated polytype sensor of native system and function element, comprise sensing element/driver element, power amplifier, signal generator, signal converter, local signal processor etc., thereby realize the multifunction of network; The sensor network with extensibility carries layer and on Nano/micron yardstick, single sensing element forms can overcome function singleness, the macrostructure unworthiness of existing structure health monitoring systems and be not suitable for the inner shortcoming that continues perception of embedded structure by extension sensor network; The high density flexible sensor network of making on micro-scale is can area coverage large, the structure of complex contour, and do not damage layer structure, damage and extreme environment are had stability, arbitrary structures is had to high-adaptability, can extension sensor network and disposable integrated manpower and the time cost saved, avoided needing in practical engineering application installing the low and system maintenance difficulty problem of poor reliability, integrated level that multiple different monitoring system brings.And be equally applicable to metal construction.
(2) the Multifunction Sensor information processing subsystem of native system has the ability of real-time collecting, processing and demonstration data.Sensing function can expand voluntarily from local to the overall situation, and utilizes the comprehensive fusion of multiple heat transfer agent to determine configuration state.
(3) the present invention can be to being design and manufacture, the operation of main body aviation aircraft and safeguarding generation revolutionary impact.By applying achievement in research of the present invention, can improve aircraft safe reliability, alleviate aircraft weight, shorten the grounding time of safeguarding, significantly reduce operation and maintenance cost.
Brief description of the drawings
The distributed multifunctional configuration state detection system composition schematic diagram that Fig. 1 embodiment of the present invention provides;
Fig. 2 is micro-line-micro-node unit of spiral design;
Fig. 3 is that scalability flexible multi-functional sensor network is manufactured and integrated flow figure;
Fig. 4 is Networked Sensors and structure assembly process schematic diagram;
Fig. 5 is stretching Platform Designing process flow diagram;
Fig. 6 is Multifunction Sensor message processing flow figure.
In accompanying drawing, 1-piezoelectric sensor; 2-carrier film; 3-can carry layer by extension sensor network; 4-can extension sensor network; 5-Multifunction Sensor information processing subsystem; The micro-node of 6-.
Embodiment
The present invention relates to cross discipline and the research directions such as materialogy, sensor network, microelectronics, structural mechanics, information science and computerized algorithm.Understand and implement the present invention for the ease of those of ordinary skill in the art, below in conjunction with the drawings and specific embodiments, the present invention being described in more detail.
As shown in Figure 1, the distributed multifunctional configuration state detection system that the embodiment of the present invention provides comprises required carrier film 2, Multifunction Sensor information processing subsystem 5 in the function components and parts, sensor network embedded composite material configuration process that can extension sensor network carry layer 3, Nano/micron yardstick.
Can extension sensor network carry layer 3 can integrated highdensity Nano/micron etc. the function components and parts of micro-scale, such as intelligent nano material, sensor, driver, advanced electronic equipment, processor etc.The present invention realizes the integrated of a large amount of microsensors and function element by designing a kind of extendible capacity polymkeric substance lift-launch layer.As shown in Figure 2, adopt a kind of spiral extensible micro-line design, the spiral winded type that micro-line is made up of sweep and straight-line segment part, a micro-node 6 of function of the each connection in its two ends.Micro-line and micro-node 6 thickness only have tens microns, the several microns of micro-line width, and the diameter of micro-node 6 is hundreds of micron dimensions.As long as two simple application of forces of micro-node 6 free end, micro-line expands into the straight line of elongation.A large amount of so micro-line-micro-node 6 cell formation two-dimensional networks, after the even stretching, extension on two-dimensional directional, network expands to macro-scale from micro-scale, realizes the more than ten rate of spread doubly.By evenly draw god in all directions, network is expanded to macro-scale from microscopic size.The design of micro-line must make just can realize larger stretching under less strain and stress is concentrated.The final size of network can be carried out cutting according to the application demand of ad hoc structure.
Use for reference nanometer and microelectronic integrated circuit design technology, polyimide polymer film can be processed into extensile micro-spider lines, remove netting twine unnecessary base material in addition, the material component of micro-line self is less to ignoring.Necessary time, micro-line can be metallized becomes wire.Micro-line connects the array of thousands of micro-nodes 6, will put into polytype sensor, driving source, electronic component or other functional materials on micro-node 6.Designed can have following features by extension sensor network lift-launch layer 3: (1) material materials are few, lightweight; (2) it is adaptable that pliable and tough macromolecule polymer material makes the shape of network lift-launch layer, the complex three-dimensional forms of energy adaptation material or structure; (3) can cover larger macro-scope; (4) can adapt to the large deformation of agent structure or material; (5) can make function element accurately be deployed to position default in structure; (6) easy to operate, cost is low; (7) carry sensing system and material integrated very convenient of layer based on scalability network because disposable being embedded in of all functions element energy, and unlike traditional manual mode, disposable can only imbed a small amount of several.
A scalable network carries on node layer integrated various types of sensor and function element according to demand and forms sensor network, make it have large-area sensing function and active and passive monitoring capability, with integrated after can obtain the structural information in object construction, as temperature, stress, strain, vibration etc., possess distributed multifunctional configuration state detectivity, its design procedure as shown in Figure 3.The available sensor for monitoring structural health conditions comprises strain ga(u)ge, Fibre Optical Sensor, piezoelectric sensor 1, magneto strictive sensor, MEMS sensor, contrast vacuum transducer, thermocouple sensor, carbon nano-tube strain transducer etc.Principle of work and feature design for all kinds sensor can be integrated into the microsensor on micro-node 6.For example, the sensor that the main function components such as strain ga(u)ge and thermocouple sensor is metal material and function element use the micro fabrication methods such as evaporation, sputter directly to carry out the processing of micro-meter scale at lift-launch layer function node.
Scalable distributed multimodal sensor network is sticked on to body structure surface or imbeds in structure can provide Real-Time Monitoring, and structure is had from perceptional function.The mutually integrated key of sensor network and composite structure has 2 points: the one, and the inventive process that needs a kind of large-scale sensor network to lay, meets the transition change of network from micro-scale to macro-scale; The 2nd, the thin layer material property that carries sensor network will adapt to severe manufacturing environment.As shown in Figure 4, the present invention by a kind of integrated can extension sensor network 4 with the carrier film 2 of composite structure, in composite material manufacturing process, the sensor network of micro-scale is expanded to large scale, and sensor is deployed to the default position of agent structure.Then carrier film 2 is removed, completed the healing of sensor and material.In order to realize above-mentioned integrating process, the present invention proposes the realistic model that a kind of analog sensor network stretches, and is designed for the stretching platform of laying sensor network.Strain, temperature, the permanance and the size being stretched etc. that can bear using sensor network, as input parameter, utilize this model to determine sensor network tensile force size, and specific design flow process as shown in Figure 5.Adopt polyimide or thin polymer film design sensor carrier thin layer, sensor network is easily installation, detachable on carrier thin film layer, and the sensor network that is embedded in composite structure inside does not impact structural behaviour.
Multifunction Sensor information handling system for collect that all functions element receives information, and carry out analyzing and processing and demonstration.According to the feature of each sensing element signal, framework open type software system platform.According to the moving damage check arithmetic analysis signal of main quilt and analysis data, utilize the comprehensive integration of multiple heat transfer agent to determine configuration state, the signal of accepting is carried out to local area data processing, global data analysis, measurement data and result can be shown in real time.
The multifunctional sensing information processing platform comprises three aspects; (1) diagnosis algorithm research (being mainly active/passive detection algorithm), (2) algorithms of different is integrated checks with stability, (3) data management system framework.The information flow of the health control data system based on distributed multi-modal sensor network and operation steps are as shown in Figure 6.Gordian technique is wherein how to resolve multi-mode sensory perceptual system to send dissimilar data stream, and carries out configuration state information fusion, and then evaluation structure health, makes corresponding decision.
The present invention takes each subsystem only to process same type data, then the Output rusults of multi-mode sensing layer different disposal subsystem is reanalysed to analytic structure health status.Adopt local damage detection algorithm to analyze the data (ultrasonic signal) that piezoelectric sensor 1 obtains, design dedicated algorithms is analyzed separately the data of strainometer, the Strain Distribution of then reconstruct total; For Temperature Distribution and Pneumatic pressure data, be also that structurally reconstruct is out for design special algorithm.Finally adopt Global Algorithm above-mentioned single analysis result to be carried out to convergence analysis, comprehensive evaluation configuration state.The storage and the communication issue that cause in order to solve complicated sensing network mass data amount, adopt a kind of distributed data digging or machine learning techniques to process from the data of multi-mode sensing layer system acquisition, basic ideas are to adopt Distributed Calculation resource to carry out extensive diagnostic to distributed data, the data structure of Local treatment is sent to health control center, and then adopt global data mining algorithm to carry out decision analysis, determine it is report to the police or trigger self-regeneration mechanism.
By implementing distributed multifunctional configuration state detection system provided by the invention, overcome existing structure condition monitoring system based on single, a small amount of sensor network, be difficult to large-scale composite material configuration state and damage thereof to carry out comprehensive monitoring, can perception and the defect of thinking oneself state to realize composite structure, there is following useful effect:
(1) the distributed multifunctional sensor network integrated with composite structure, form a kind of sensing technology with multi-mode sensing function, provide important foundation and technical support for realizing composite structure-function integration, following composite structure can be designed and be made into that to have intelligent sensing function, environmental suitability etc. multi-functional;
(2) can extension sensor network carry layer 3 and on micro-scale, make that high density flexible sensor network is can area coverage large, the composite structure of complex contour, and damaged composite material structure not;
(3) the distributed multifunctional configuration state detection system that the present invention proposes can be applied to metal construction equally.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (8)
1. a distributed multifunctional configuration state detection system, it is characterized in that, comprise and can extension sensor network carry layer, function components and parts, sensor and be pasted on carrier film required in body structure surface or embedded structure process and Multifunction Sensor information processing subsystem, wherein:
The described layer that can extension sensor network carries, thus carry out large-area configuration state detection and as the signal transmission network between function element for integrated a large amount of multi-modes, multi-functional function components and parts;
Described function components and parts change and transmission/processing signals for generation of the physical quantity of pumping signal, reception transducing signal, monitoring of structures;
Described carrier film is for being accurately pasted on sensor network the relevant position of body structure surface or embedded structure;
The dissimilar data stream that described Multifunction Sensor information processing subsystem sends for receiving and resolve multi-mode sensory perceptual system, and carries out configuration state information fusion, and health status based on information fusion evaluation of result structure.
2. distributed multifunctional configuration state detection system according to claim 1, is characterized in that, described can extension sensor network lift-launch layer be the network being made up of the micro-node connecting by micro-line.
3. distributed multifunctional configuration state detection system according to claim 2, is characterized in that, can in wired sensing situation, can be metallized as transfer wire and use by extension sensor network lift-launch layer.
4. distributed multifunctional configuration state detection system according to claim 3, is characterized in that, described can extension sensor network lift-launch layer material be flexible macromolecule polymkeric substance.
5. distributed multifunctional configuration state detection system according to claim 1, is characterized in that, described function element comprises sensing/exciting element, power amplifier, signal generator and signal processor;
Described sensing/exciting element comprises piezoelectric sensor, temperature sensor, smart coat, foil gauge or comparison vacuum transducer;
Described function element is Nano/micron level functional unit, for can extension sensor network carry the mutually integrated formation Multifunction Sensor network of layer, configuration state is carried out to omnibearing monitoring, required various sensing datas are provided.
6. distributed multifunctional configuration state detection system according to claim 1, it is characterized in that, described carrier film is flexible macromolecule polymer film layer, for laying the sensor network nodes position after transition change and the dilatation of sensor network from micro-scale to macro-scale.
7. distributed multifunctional configuration state detection system according to claim 1, it is characterized in that, described Multifunction Sensor information processing subsystem comprises multiple information processing subsystems, the data of each subsystem processes same type, and the Output rusults of multi-mode sensing layer different disposal subsystem is reanalysed to the health status with analytic structure.
8. distributed multifunctional configuration state detection system according to claim 7, is characterized in that, that described information processing subsystem comprises is active, passive type detection algorithm, algorithms of different are integratedly checked with stability, data management system framework.
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