EP2318930A1 - Verfahren zur darstellung eines zustands - Google Patents
Verfahren zur darstellung eines zustandsInfo
- Publication number
- EP2318930A1 EP2318930A1 EP09775909A EP09775909A EP2318930A1 EP 2318930 A1 EP2318930 A1 EP 2318930A1 EP 09775909 A EP09775909 A EP 09775909A EP 09775909 A EP09775909 A EP 09775909A EP 2318930 A1 EP2318930 A1 EP 2318930A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vector
- state
- component
- coordinate system
- arrangement
- 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- Withdrawn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
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000013598 vector Substances 0.000 claims abstract description 100
- 238000005259 measurement Methods 0.000 claims abstract description 25
- 238000004590 computer program Methods 0.000 claims abstract description 12
- 230000036962 time dependent Effects 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 41
- 238000011161 development Methods 0.000 description 6
- 238000003745 diagnosis Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000004040 coloring Methods 0.000 description 1
- 238000011157 data evaluation Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0216—Human interface functionality, e.g. monitoring system providing help to the user in the selection of tests or in its configuration
Definitions
- the invention relates to a method for displaying a state of at least one component of a device, to an arrangement for representing a state of at least one component of a device, to a computer program and to a computer program product.
- condition assessment of devices is usually based on the analysis of the development over time of different variables, ie of parameters. This also includes the trend and thus the provision of trends or a trend in the development of individual variables, whereby different parameters are represented multidimensionally as a function of time or other relevant parameters.
- machine diagnostics there is the problem of presenting a multiplicity of different parameters, which are based, for example, on the vibration signal in the time or frequency domain, in a clear form.
- a related difficulty is that a statement of the overall condition of the machine or system can not be reliably done at a glance, as a measured value for a parameter is designed for different components of the machine or system, or as inaccurate for the general diagnosis is that monitoring individual characteristics is not reliable enough.
- the invention relates to a method for displaying a state of at least one component of a device. It is provided that for the at least one component measurements are carried out, wherein a number of sizes measured and at least one detected characteristic for the number of sizes in an at least two-dimensional coordinate system for representing or representing the state is represented as a vector.
- the method is carried out such that there is a relationship between the state of the at least one characteristic value and the vector.
- the at least one characteristic value is detected or determined, wherein a statement about the state is made by this at least one characteristic value.
- the vector which can also be referred to as an event vector, is provided, this vector corresponding to an image of the at least one characteristic value and thus of the state.
- a state for example, a machine component state, machine state or system state can be displayed.
- a vector used to represent a state has a number of dimensions adapted to the application. Alternatively or additionally, the dimension of the vector may also depend on a diagram used to represent the state. Due to the selected number of dimensions, a corresponding number of parameters can be represented by the vector.
- vectors are shown as, for example, two-dimensional arrows. In the context of the invention, however, it can be provided that vectors are generally graphic elements.
- measurements are carried out in a range of raw signals and envelope signals for the at least one component. It may be unfiltered raw signals and / or filtered or otherwise preprocessed time and frequency signals, for. B. envelope signals in the sense of customary in the field of vibration diagnosis demodulation of the signals to be processed. Based on this, the at least two-dimensional coordinate system is spanned in the region of the raw signals and envelope signals. Typically, the raw signals are provided from unfiltered vibration signals and the envelope signals from demodulated vibration signals.
- the vectors provide characteristic values or values for at least one subassembly of the device which comprises the at least one component of the device.
- the values can be determined, for example, by a vibration or sound measurement.
- values for temperature, oil condition and other measurements can also be determined.
- a resulting, for example, time-dependent vector can be calculated from at least one characteristic value which represents the state, whereby a state of the at least one component of the pre-existing vector is obtained by the resulting vector. direction at a time t n is shown.
- a vector is defined in the at least two-dimensional coordinate system over an angle and a length, wherein the angle and the length represent shock and / or sinusoidal oscillations.
- one vector is assigned to a quadrant and / or cuboid of the at least two-dimensional coordinate system.
- the vector representing a characteristic value can be displayed time-dependent or frequency-dependent.
- the invention also relates to an arrangement for representing a state of at least one component of a device.
- the arrangement has at least one measuring module which is designed to carry out measurements for a component and to measure a number of sizes or at least one size.
- the arrangement also has at least one display module, which is designed to display at least one detected characteristic value for the number of variables for representing the state in an at least two-dimensional coordinate system as a vector.
- the arrangement may u. a. at least one arithmetic unit, which is designed to provide the at least one vector for representing the state in the at least two-dimensional coordinate system.
- the arrangement described is designed to carry out all the steps of the presented method.
- individual steps of this method can also be carried out by individual modules of the arrangement.
- functions of the arrangement or functions of individual modules of the arrangement can be implemented as steps of the method.
- the invention further relates to a computer program with program code means in order to perform all the steps of a described method when the computer program is executed on a computer or a corresponding arithmetic unit, in particular in an arrangement according to the invention.
- the computer program product according to the invention with program code means which are stored on a computer-readable data carrier is designed to carry out all the steps of a described method when the computer program is executed on a computer or a corresponding arithmetic unit, in particular in an arrangement according to the invention.
- the method is u. a. for easy and clear representation of damage states in devices that are designed as machines or systems suitable.
- a general measurement data evaluation and display for example of state measurements on rolling bearings, plain bearings and / or gears by means of vibration analysis, possible.
- the method can provide a clear representation of a large number of variables on the basis of detected characteristic values for simple condition detection of complex devices, for example complex systems such as gears, rolling mills, etc.
- an at least two-dimensional coordinate system is introduced, which is usually spanned by measurements in the Rohsignal- and Hüll- curve signal range.
- the dependence of these two signal forms on the state of the device is used.
- an assessment and / or diagnosis of a state of the device which can be configured as a machine or system in general, by means of vibration or sound measurements, for example, structure-borne sound measurements or airborne sound measurements in any frequency ranges on the device and their evaluation in the time and / or frequency range possible.
- One aspect of the invention involves applying event vectors in a two-, three-, or more-dimensional coordinate system. The vectors for individual characteristic values are assigned to different quadrants and / or cuboids of the coordinate system.
- Figure 1 shows a first exemplary embodiment of a diagram, which is designed here as a two-dimensional coordinate system.
- FIGS. 2 to 5 shows a second exemplary embodiment of a diagram, which is embodied here as a two-dimensional coordinate system, wherein different vectors are shown in this diagram for each figure.
- FIG. 6 shows a third exemplary embodiment of a diagram, which is embodied here as a three-dimensional coordinate system.
- Figure 7 shows a fourth exemplary embodiment of a diagram, which is designed here as a three-dimensional coordinate system.
- FIG. 8 shows an exemplary embodiment of an arrangement according to the invention.
- the two-dimensional coordinate system diagram 10 in FIG. 1 has an x-axis and a y-axis. In the diagram 10 three vectors 12, 14, 16 are shown. In addition, the diagram 10 has a sum vector 18.
- the diagram comprises four quadrants 20, 22, 24, 26.
- a first quadrant 20 comprises narrow-band sizes (RMS, root mean square), which are designed as diagnostic variables
- a second quadrant 22 comprises broadband diagnostic quantities or root mean square quantities (RMS , root mean square).
- a third quadrant 24 comprises enveloping broadband diagnostic variables and thus variables
- a fourth quadrant 26 comprises envelope signals or enveloping narrowband diagnostic variables or quantities.
- a measurement is carried out to display a state of at least one component of a device for this at least one component. For this a number of sizes are measured. For this number of sizes at least a value formed as characteristic value in the here presented at least two-dimensional diagram 10 for representing the state is shown as vector 12, 14, 16. All the vectors 12, 14, 16 shown in FIG. 1 as well as the sum vector 18 are drawn starting from an origin of the diagram 10. In the embodiment of the method presented on the basis of this diagram 10, it is provided that a damage profile is displayed as the state of the at least one component.
- vectors 12, 14, 16 formed as event vectors in the two-dimensional state space are thus illustrated schematically by way of example. Lengths and angles of the vectors 12, 14, 16 show a significance of a damage course for the at least one component.
- an assessment and / or diagnosis of a state of a device which may be designed as a machine or system, by means of structure-borne noise measurements on the device and their evaluation in the time and frequency range possible.
- One aspect of the invention comprises the application of vectors 12, 14, 16 and thus of event vectors in a two-, three- or more-dimensional coordinate system, as shown for example on the basis of diagram 10 of FIG.
- the individual vectors 12, 14, 16 representing characteristic values are assigned to the quadrants 20, 22, 24, 26 of the diagram 10.
- the position of the vectors 12, 14, 16 is determined by the at least one angle and the length.
- the assignment of the vectors to the quadrants 20, 22, 24, 26, the length of the vectors 12, 14, 16 and their position in the vector space is in principle arbitrary.
- the knowledge about the theory of damage in the occurrence of bumpy and sinusoidal vibration of importance defines both the length and the at least one angle of the vectors 12, 14, 16 in the diagram 10 or in the coordinate system with respect to the other variables provided.
- the length of a vector 12, 14, 16 can directly represent the measured value or a quantity derived from the measured value or else be determined by normalization to any desired values, for example an initial value of a measurement.
- the designed as a coordinate or Achsennchsystem diagram 10 differentiates in this particular case on the one hand after measurements in the Rohsignal Symposium Symposium, where unfiltered vibration signals are taken into account.
- a distinction of envelope signal measurements is provided, taking demodulated signals into account.
- This division represents the x-axis in the example.
- the perpendicular y-axis develops from broadband diagnostic variables to narrowband diagnostic variables. In this case, it is thus an illustration related to the frequency range.
- any third dimension is conceivable, for example the z-axis as power axis or time axis.
- Any fourth dimension can be inserted, for example, by suitable coloring.
- the representation of a fifth dimension is possible when the vectors are drawn with different weights.
- FIGS. 2, 3, 4 and 5 each show a second embodiment of a diagram 30 designed as a two-dimensional coordinate system.
- a first vector 34 is shown in a first quadrant 32 of the diagram 30, a second vector 38 in a second quadrant 36, a third vector 42 in a third quadrant 40 and a fourth vector 46 in a fourth quadrant 44.
- a resulting vector 48 is shown in this second embodiment of the diagram 30, a resulting vector 48 is shown.
- the first quadrant 32 comprises variables which are designed as narrow-band diagnostic variables in the root mean square (RMS)
- the second quadrant 36 comprises broadband diagnostic variables and thus variables in the root mean square (RMS).
- the third quadrant 40 comprises enveloping broadband variables designed as diagnostic variables and the fourth quadrant 44 for envelope signals or for enveloping narrowband diagnostic variables or quantities.
- the vectors 34, 38, 42, 46 shown in the diagram 30 again represent at least one characteristic value for a number of variables.
- the at least one characteristic value is detected during a measurement of a state of at least one component of a device.
- the illustrated vectors 34, 38, 42, 46 represent the state of the at least one component of the device and thus represent it.
- the four figures 2 to 5 show the vectors 34, 38, 42, 46 and the resulting vector 48 at different times. About these vectors 34, 38, 42, 46 at the same time a temporal evolution of four characteristics is shown. 2, a first time, based on the second representation of the diagram 30 in FIG.
- a second time based on the third representation of the diagram 30 in FIG. 4, a third time and through the fourth representation of the diagram In FIG. 5, a fifth time for a state of the at least one component of the device is represented by the vectors 34, 38, 42, 46, 48 and thus represented.
- a so-called good state is shown schematically by the vectors 34, 38, 42, 46.
- the magnitude of the individual characteristics represented by the vectors 34, 38, 42, 46 is small.
- the resulting vector 48 points with an equally small amount in a narrowband envelope signal range.
- a characteristic increase of the fourth vector 46 is shown in the region of the narrow-band envelope signal analysis, as is theorized in the case of incipient outer ring damage of a rolling element. camp is the case.
- the remaining vectors 34, 38, 42 show no significant change.
- the magnitude of the resulting vector 48 is greater than in Figure 2, and thus, in combination with the angular change, clearly shows evolving damage.
- Progressive damage development is characterized by a transition of the resulting vector 48 from the fourth quadrant 44 to the first quadrant 32 and thus envelope signals to RMS raw signal values.
- the resulting vector 48 thus experiences a significant change in angle in this area.
- FIG. 5 shows that the contribution of the broadband characteristic values increases, which leads to a further rotation of the sum vector 48.
- Another possibility of representing the changing state of a device represented by the four vectors 34, 38, 42, 46 consists of raw signals in an axis coordinate system spanned by the x-axis region and by the y - Axis range Envelope signals of all amplitude values of the individual FFT frequency points and thus frequency points of a fast Fourier transform (Fast Fourier transform) to enter one above the other.
- the respectively associated amplitude values of the frequency which are obtained from the raw and envelope signal A 10 HzROh and AIOHZHÜH, form a vector ZAioHzRohHüii- All vectors AJHZROHHÜII lead, with suitable weighting, to a resulting vector V reS (t). Finally, this resulting vector V reS (t) of each measurement is entered at the respective time in the diagram.
- the diagram 50 formed as a coordinate system from FIG. 6 comprises the schematic representation of such resulting vectors V reS (t) .
- This Diagram is spanned by frequency amounts for envelope signals and raw signals. A changing status of the device is indicated by greatly changed vector positions.
- the resulting vectors V r es ( t ) within the diagram 50 are shown as diamonds. In this case, initially resulting vectors V reS ( t ) are measured with a low frequency amount for a raw signal. Over time, for example, as the damage progresses, the frequency magnitudes of the envelope of the resulting vectors Vres (t) increase, for example. In the exemplary further damage development, the frequency amounts of the raw signal additionally increase at later times. This allows the user a visual assessment of the damage development.
- the vectors V reS (t) from the diagram 50 are also shown as rhombuses in three dimensions in the diagram 100 of FIG. 7 in the form of a coordinate system, whereby the frequency amount in the ultrasonic range is taken into account by a third axis.
- Diagram 10 of FIG. 7 shows that the additional vector provides a spatial be provided state assessment.
- other physical quantities for example temperature or electrical conductivity, can also be represented along the third dimension.
- the combination of ultrasonic information with raw or envelope signals in the two-dimensional coordinate system or coordinate system can also be implemented in the context of the method. This results in a representation as in Figure 6 with changed axis designations.
- the procedure described can len both with time and Frequenzsigna- and corresponding differences, z. B. difference spectra created.
- FIG. 8 shows a schematic representation of a device 120 and an embodiment of an arrangement 122 according to the invention.
- the device 120 has a first component 124, a second component 126 and a third component 128.
- the arrangement 122 has three measuring modules 130, 132, 134 formed as sensors.
- the arrangement 122 comprises a detection unit 136, a computing unit 138 and a display module 140.
- a first measuring module 130 is assigned to a first component 124 of the device 120, a second measuring module 132 to a second component 126, and a third measuring module 134 to a third component 128. Sizes of the components 124, 126, 128 are measured by the measuring units 130, 132, 134.
- measured values for the measured variables are transmitted to the detection unit 136 by wire, alternatively or in addition by way of wireless technology, using suitable radio technology.
- the arithmetic unit 138 the measured values are further processed to the sizes and to a graphical representation edited.
- the graphically processed characteristic values are represented by the display module 140 of the arrangement 122 in the form of diagrams 10, 30, 50, 100, which are designed here as coordinate systems and have already been presented in FIGS. 1 to 7.
Landscapes
- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (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 |
|---|---|---|---|
| DE102008033500A DE102008033500A1 (de) | 2008-07-16 | 2008-07-16 | Verfahren zur Darstellung eines Zustands |
| PCT/DE2009/000887 WO2010006574A1 (de) | 2008-07-16 | 2009-06-26 | Verfahren zur darstellung eines zustands |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2318930A1 true EP2318930A1 (de) | 2011-05-11 |
Family
ID=41165661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09775909A Withdrawn EP2318930A1 (de) | 2008-07-16 | 2009-06-26 | Verfahren zur darstellung eines zustands |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20110125463A1 (de) |
| EP (1) | EP2318930A1 (de) |
| DE (1) | DE102008033500A1 (de) |
| WO (1) | WO2010006574A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02298825A (ja) * | 1989-05-13 | 1990-12-11 | Nippondenso Co Ltd | 回転機のための異常検査装置 |
| DE10138919C1 (de) * | 2001-08-08 | 2003-01-02 | Siemens Ag | Spektrale Bewertung eines Prüfobjekts |
| WO2005066648A1 (en) * | 2003-12-31 | 2005-07-21 | Zhaolei Wang | A method for measuring the operating state of a synchronous motor using composite power angle meter |
| JP4183185B2 (ja) * | 2004-03-10 | 2008-11-19 | インターナショナル・ビジネス・マシーンズ・コーポレーション | 診断装置、検出装置、制御方法、検出方法、プログラム、及び記録媒体 |
| US20070088550A1 (en) * | 2005-10-13 | 2007-04-19 | Dimitar Filev | Method for predictive maintenance of a machine |
| EP1793296A1 (de) * | 2005-12-05 | 2007-06-06 | Insyst Ltd. | Verfahren und Gerät zur Analyse eines Prozesses mit auf Parametern basierten Fehlern |
| ATE515739T1 (de) * | 2006-08-25 | 2011-07-15 | Accenture Global Services Ltd | Visualisierung von daten für diagnose- rechnersysteme |
-
2008
- 2008-07-16 DE DE102008033500A patent/DE102008033500A1/de not_active Withdrawn
-
2009
- 2009-06-26 EP EP09775909A patent/EP2318930A1/de not_active Withdrawn
- 2009-06-26 WO PCT/DE2009/000887 patent/WO2010006574A1/de not_active Ceased
- 2009-06-26 US US13/054,125 patent/US20110125463A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010006574A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010006574A1 (de) | 2010-01-21 |
| US20110125463A1 (en) | 2011-05-26 |
| DE102008033500A1 (de) | 2010-01-21 |
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