EP3659346A1 - System zur zerstörungsfreien zustandsüberwachung von faserverstärkten bauwerken, wie faserverstärkte hohlkörper - Google Patents
System zur zerstörungsfreien zustandsüberwachung von faserverstärkten bauwerken, wie faserverstärkte hohlkörperInfo
- Publication number
- EP3659346A1 EP3659346A1 EP18737236.2A EP18737236A EP3659346A1 EP 3659346 A1 EP3659346 A1 EP 3659346A1 EP 18737236 A EP18737236 A EP 18737236A EP 3659346 A1 EP3659346 A1 EP 3659346A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- data
- fiber
- hollow body
- radio unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2437—Piezoelectric probes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0033—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining damage, crack or wear
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/041—Analysing solids on the surface of the material, e.g. using Lamb, Rayleigh or shear waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/223—Supports, positioning or alignment in fixed situation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
- G01B2210/58—Wireless transmission of information between a sensor or probe and a control or evaluation unit
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0231—Composite or layered materials
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
- H04Q2209/82—Arrangements in the sub-station, i.e. sensing device where the sensing device takes the initiative of sending data
Definitions
- Nondestructive condition monitoring system for fiber reinforced structures such as fiber reinforced hollow bodies
- the present invention relates to a system for nondestructive testing of a sample using a combination of sensors and radio units that allow continuous monitoring to provide data obtained by nondestructive testing.
- the present invention also provides a method for non-destructive testing of a sample using a combination of sensors and radio units that provide continuous monitoring to provide data obtained by nondestructive testing.
- Fiber-reinforced hollow bodies such as pipes or reactors
- the materials to be transported therein or the reactions to be carried out therein are such that continuous structure monitoring is necessary to ensure that no leaks, etc. occur in which toxic or otherwise hazardous substances or mixtures escape.
- Manual monitoring processes are labor-intensive, time-consuming and costly, since the systems to be monitored often have to be shut down and partially emptied or measuring devices have to be installed (expensive conventional monitoring methods are, for example, external visual monitoring, monitoring by external light irradiation, endoscopic camera inspection, X-ray monitoring). Only then can the test be carried out, which often can not be non-destructive, since samples may have to be removed from a system and then analyzed.
- Non-destructive techniques have been developed in the area of structural monitoring (hereinafter also structural health monitoring / SHM), for example in the field of aircraft construction. Non-destructive testing makes it possible to detect different types and sizes of aircraft Defects and above that the determination of the material properties.
- Conventional nondestructive testing techniques for samples, such as fiber reinforced plastics include ultrasonic and thermographic testing. For example, in ultrasonic pulse non-destructive testing, a pulse passes through the sample and is reflected off the opposite surface of the sample. Defects within the sample reflect, absorb or dissipate the pulse such that a pulse echo from the opposite sample surface of the sample is reduced.
- Such monitoring also known as Structural Health Monitoring (SHM)
- SHM Structural Health Monitoring
- Such fiber composite materials are materials which consist of reinforcing fibers which are embedded in a plastic matrix.
- the problem with such structures are the damage reaction and damage monitoring.
- SHM methods are known in which measurement signals are detected with separately used elements. Such a signal detection takes place both at dormant structures as well as structures in use.
- the inventive system for non-destructive condition monitoring therefore comprises the components defined in claim 1.
- Preferred embodiments are specified in the dependent claims. The skilled person will be informed on the basis of the following description. It should be understood that the present invention is not limited to the specific combinations of features described, but will be apparent to those skilled in the art further combinations and embodiments, which are included and protected here.
- the system according to the invention comprises at least one building, such as a hollow body (pipe, pipe, reactor) or the like, which is made of a fiber-reinforced plastic material. This is the part to be monitored.
- This hollow body is further equipped with a sensor which is positively connected to the monitored structure made of fiber composite plastic.
- This sensor may for example be a PWAS sensor (piezoelectric wafer active sensor).
- This sensor is suitable for acquiring structural integrity data and is based on PWAS guided waves in the multilayer composite. It is advantageous that unilateral accessibility for structural monitoring is completely sufficient.
- Such sensors are according to the invention positively connected to the component to be monitored, and this can already be done in the construction of the component. However, a retrofit of already installed components is possible. In this case, a lamination and encapsulation with epoxy materials has proven to be suitable.
- the sensor can then detect quantitative data, such as a measured increase in attenuation and drop in phase velocity, by using appropriate pulses (eg, Lamb waves).
- pulses eg, Lamb waves
- Such effects correlate with the conventional indicators of global fatigue damage, inter-fiber cracking density and resulting stiffness degradation.
- Such structural disturbances as a result of static and dynamic (over) loading lead to microcracks that absorb, for example, a pressurized or heated medium (such as, for example, aggressive media stored, reacted or transported in such structures and hollow bodies.) This leads to degradation phenomena.
- the data evaluation then takes place, for example, on the basis of the method of acoustic emission analysis (SEA), which is based on the detection of elastic waves which are emitted by failure events such as inter-fiber breakage, fiber breakage or delamination in the fiber composite component.
- SEA acoustic emission analysis
- a significant advantage of the system according to the invention is to be seen in the immediate detection of damage events, which locally have a spontaneous release of deformation energy result.
- the challenge to deduce the type and severity of the damage from the amplitude and frequency of the acoustic signals could be successfully overcome according to the invention by the use of acoustic (preferably piezoelectric) sensors.
- a sensor form that is preferably used for this purpose is that the actuator and sensor work in one element.
- the data acquisition in such an actuator / sensor unit takes place in the context of the resonance. Due to the anisotropy of the fiber composite material is therefore preferably not evaluated with a constant frequency but the system preferably always calibrates to the frequency at which the highest amplitude is present. This is ensured by the bidirectionality of the actuator / sensor unit. This allows extremely accurate measurement data acquisition.
- this sensor is connected to a controller and / or radio unit likewise provided on the structure to be monitored. These components are used for data transfer to a central data acquisition and data evaluation system.
- a trigger threshold can already be taken into account so that, for example, when a certain level is exceeded, automated messages, optionally via an intermediate data processing and storage unit, are transmitted to terminals (tablet / smartphone, etc.).
- the unit of sensor and radio unit is preferably designed so that a long-term use is possible. For this purpose, this unit can be equipped with a battery for a sufficiently long power supply. This way, several years of operation can be secured.
- the central data acquisition system can be a cloud-based system or even an application server, so that a strong spatial separation is possible and, for example, optimal computer capacities can be exploited.
- gateway devices may be interposed so as to transmit the data of a plurality of sensors completely to the data acquisition and data evaluation unit.
- the system according to the invention may comprise a large number of such sensors, so that it is possible to monitor a larger system.
- large (extensive) systems to be monitored where it may not be possible to ensure that the data can be safely transmitted from the individual sensors to a central unit (because the distance is too long for a secure wireless transmission), individual areas can
- the system can be equipped with individual receivers (gateway installations) so that even large-scale plants can be safely monitored.
- LoRaWAN load-to-live
- AES high level of security
- Such monitoring systems thus comprise a plurality of sensors, each equipped with a wireless unit for wireless data transmission and positively connected to the structures / hollow bodies to be monitored. Furthermore, such a system, depending on the size of the system at least one gateway installation for receiving the data (and forwarding this to a central data acquisition and data processing unit).
- the data of the multiple sensor units can be processed centrally. Since the sensors continuously acquire the data and transmit it in a suitable manner continuously, so the central data acquisition and data processing unit can continuously process the received data to filter out from the raw data necessary for the structure monitoring information.
- the data processing programs to be used in this context are familiar to the person skilled in the art.
- the advantage of the SHM method according to the invention and thus of the system according to the invention over conventional methods is that they can in principle always provide clues about the functionality of a component and / or continuously track the generation of defects in real time, so that an alarm is sent via suitable control of the evaluation - tion function can be ensured.
- Depending on the method of data evaluation can also be describe the load condition continuously (in the following also CMS, "condition monitoring system). Due to the continuous structure monitoring, such a system during operation of a plant so in time to point to emerging vulnerabilities, so that maintenance and repairs can be carried out targeted. Since the monitoring takes place continuously during operation, undesired style service lives can be avoided.
- This system can also be designed in such a way that, for example, warnings are automatically transmitted to the person responsible for a particular part of the installation in the case of weak points or problem areas that are emerging, so that then the necessary further steps can be initiated without delay.
- the system can also automatically suggest the steps to be initiated in embodiments and, for example, make material orders, etc.
- the system can then continuously communicate status reports based on the received data so that necessary maintenance or repair work is scheduled in time and in accordance with, for example, normal shutdowns (for cleaning operations or when switching to others Reactions / materials) can be performed.
- necessary maintenance or repair work is scheduled in time and in accordance with, for example, normal shutdowns (for cleaning operations or when switching to others Reactions / materials) can be performed.
- the time required for such maintenance and repairs since they can be planned better reduced.
- the continuous monitoring of the system continuously records and evaluates the maintenance-relevant structural data so that it is often possible to predict in advance how long to carry out maintenance and repair work. This also simplifies the workflow in such systems.
- the use of the system according to the invention can avoid complicated wiring, which is both labor-intensive and expensive.
- the radio modules used ensure reliable data transmission over radio links of several kilometers.
- the system according to the invention is suitable for monitoring critical points of a system / component, although a complete system can also be monitored. All that is required is for a sufficient number of sensors to be mounted on the system. With the above-disclosed as preferred PWAS sensors (SHM with Lamb waves), it is sufficient in a system to distribute the sensors so that the distance between the individual sensors in the range of 1 to 5 meters, preferably 1 to 3 meters. This ensures a complete continuous structure monitoring (SHM and CMS).
- the data evaluation takes place on the basis of the transmitted raw data in a central data processing unit using analytical software for data processing.
- the system can be configured such that the determined state information is automatically transmitted to the intended recipient (maintenance personnel, but also data storage / data storage), for example by wireless transmission to end user devices (smartphone / tablet / laptop, etc.). ).
- this provides a condition monitoring system that continuously, non-destructively generates state data over a long period of time, automatically and wirelessly transmits it and a data acquisition and evaluation unit, and then provides the state information and possibly action suggestions (maintenance intervals, concrete maintenance or repair work).
- the data obtained in this context for example, automated alerts in case of loss (or impending loss, the particular threshhold can be customized) of structural integrity, by email, SMS and other typical electronic forms of communication.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202017003463.8U DE202017003463U1 (de) | 2017-06-30 | 2017-06-30 | System zur zerstörungsfreien Zustandsüberwachung von faserverstärkten Bauwerken, wie faserverstärkte Hohlkörper |
PCT/EP2018/067773 WO2019002619A1 (de) | 2017-06-30 | 2018-07-02 | System zur zerstörungsfreien zustandsüberwachung von faserverstärkten bauwerken, wie faserverstärkte hohlkörper |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3659346A1 true EP3659346A1 (de) | 2020-06-03 |
Family
ID=59580673
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18737236.2A Withdrawn EP3659346A1 (de) | 2017-06-30 | 2018-07-02 | System zur zerstörungsfreien zustandsüberwachung von faserverstärkten bauwerken, wie faserverstärkte hohlkörper |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3659346A1 (de) |
DE (1) | DE202017003463U1 (de) |
WO (1) | WO2019002619A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3614135A1 (de) * | 2018-08-24 | 2020-02-26 | Kurotec - KTS Kunststofftechnik GmbH | System zur zerstörungsfreien zustandsüberwachung von metallischen bauwerken, insbesondere stahlrohren und strukturen und bauwerken aus faserverbundmaterialien sowie materialhybriden |
EP3772647A1 (de) * | 2019-08-09 | 2021-02-10 | Kurotec - KTS Kunststofftechnik GmbH | System zur zerstörungsfreien zustandsüberwachung von metallischen bauwerken |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10724994B2 (en) * | 2015-12-15 | 2020-07-28 | University Of South Carolina | Structural health monitoring method and system |
JP6032380B1 (ja) * | 2016-03-17 | 2016-11-30 | 富士電機株式会社 | モニタリングシステムおよびモニタリング方法 |
CN106453469A (zh) * | 2016-03-22 | 2017-02-22 | 北京科技大学 | 一种低功耗自供电的物联网结构健康监测系统 |
CN106652405A (zh) * | 2016-11-10 | 2017-05-10 | 同济大学 | 一种基于多种无线传感器节点的隧道结构远程监测系统 |
-
2017
- 2017-06-30 DE DE202017003463.8U patent/DE202017003463U1/de not_active Expired - Lifetime
-
2018
- 2018-07-02 WO PCT/EP2018/067773 patent/WO2019002619A1/de unknown
- 2018-07-02 EP EP18737236.2A patent/EP3659346A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2019002619A1 (de) | 2019-01-03 |
DE202017003463U1 (de) | 2017-07-26 |
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