CA2970403C - Method and apparatus for detecting, evaluating and displaying measurement values of motors of electric drives - Google Patents
Method and apparatus for detecting, evaluating and displaying measurement values of motors of electric drives Download PDFInfo
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- CA2970403C CA2970403C CA2970403A CA2970403A CA2970403C CA 2970403 C CA2970403 C CA 2970403C CA 2970403 A CA2970403 A CA 2970403A CA 2970403 A CA2970403 A CA 2970403A CA 2970403 C CA2970403 C CA 2970403C
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- 238000005259 measurement Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 11
- 230000000052 comparative effect Effects 0.000 claims abstract 2
- 238000011156 evaluation Methods 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 4
- 238000011835 investigation Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000004888 barrier function Effects 0.000 abstract description 3
- 206010041052 Sluggishness Diseases 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 229940102098 revolution Drugs 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D7/00—Indicating measured values
- G01D7/02—Indicating value of two or more variables simultaneously
- G01D7/08—Indicating value of two or more variables simultaneously using a common indicating element for two or more variables
- G01D7/10—Indicating value of two or more variables simultaneously using a common indicating element for two or more variables giving indication in co-ordinate form
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
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- Testing Or Calibration Of Command Recording Devices (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to a method for detecting, evaluating and displaying measurement values of motors of electric drives, such as those in the case of drives for barriers, switches, windows or gates and to an apparatus for implementing said method.
At least one sensor measures the electrical characteristic values of the motor, which are read into a data processing system and evaluated.
The measured values are compared with one another as a function of the mechanical position of the driven components over a period comprising a plurality of control operations. The representation takes place by simultaneously displaying the measured values both as a function of the revolution time of the drive as well as in a comparative manner over many measurement cycles. For this purpose, the measurement points are colour coded. Due to the representation of numerous measurement curves side-by-side, both the present technical condition of the electric drive can be judged and a prediction made about its future scope of maintenance.
At least one sensor measures the electrical characteristic values of the motor, which are read into a data processing system and evaluated.
The measured values are compared with one another as a function of the mechanical position of the driven components over a period comprising a plurality of control operations. The representation takes place by simultaneously displaying the measured values both as a function of the revolution time of the drive as well as in a comparative manner over many measurement cycles. For this purpose, the measurement points are colour coded. Due to the representation of numerous measurement curves side-by-side, both the present technical condition of the electric drive can be judged and a prediction made about its future scope of maintenance.
Description
Method and apparatus for detecting, evaluating and displaying measure-ment values of motors of electric drives The invention relates to a method for detecting, evaluating and displaying measurement values of motors of electric drives, and to an apparatus for im-plementing said method.
In numerous technical apparatus, switching operations between mechanical states are realised by means of electric motors. Frequently, the switching oper-ations are cyclic in the sense that always it is switched back and forth between at least two defined states. Examples of such electrically driven systems are barriers for railway transitions, drives for changing the switch position in rail-bound traffic, or drives for opening and closing windows, gates, etc. The ser-vomotors run in a reproducible manner from defined initial points to defined endpoints and back again.
If the functional capability and the technical condition of such installations are to be monitored, it is necessary to make a statement about the sluggishness of the plant. For this purpose, for example, the electrical characteristic curves of the drive motors are determined and evaluated. Sluggishness, which can be caused by wear, for example, would be noticed by the fact that greater power consumption of the motor is measured than by reference values.
In order to be able to assess the technical state of an electrically driven system, it is a necessary to evaluate the data of measured value.
With respect to switching drives, for example, the current profile during a switchover operation is recorded and compared with a reference curve.
The data are displayed on an output device with an ordinary coordinate system in which the measuring time is selected as the abscissa and the current magni-tude or the difference between the measured current values and the reference curve is selected as the ordinate.
In such a representation, however, a comparison with earlier or later measure-ments is difficult to visualise.
DE 197 33 001 Al describes a method for detecting, evaluating and displaying measured values, in which the measurement or comparison values are dis-played in alphanumeric form, wherein the alphanumeric representation of a
In numerous technical apparatus, switching operations between mechanical states are realised by means of electric motors. Frequently, the switching oper-ations are cyclic in the sense that always it is switched back and forth between at least two defined states. Examples of such electrically driven systems are barriers for railway transitions, drives for changing the switch position in rail-bound traffic, or drives for opening and closing windows, gates, etc. The ser-vomotors run in a reproducible manner from defined initial points to defined endpoints and back again.
If the functional capability and the technical condition of such installations are to be monitored, it is necessary to make a statement about the sluggishness of the plant. For this purpose, for example, the electrical characteristic curves of the drive motors are determined and evaluated. Sluggishness, which can be caused by wear, for example, would be noticed by the fact that greater power consumption of the motor is measured than by reference values.
In order to be able to assess the technical state of an electrically driven system, it is a necessary to evaluate the data of measured value.
With respect to switching drives, for example, the current profile during a switchover operation is recorded and compared with a reference curve.
The data are displayed on an output device with an ordinary coordinate system in which the measuring time is selected as the abscissa and the current magni-tude or the difference between the measured current values and the reference curve is selected as the ordinate.
In such a representation, however, a comparison with earlier or later measure-ments is difficult to visualise.
DE 197 33 001 Al describes a method for detecting, evaluating and displaying measured values, in which the measurement or comparison values are dis-played in alphanumeric form, wherein the alphanumeric representation of a
2 measurement or comparison value is assigned a colour value in the representation in each case as a function of the determined comparison value.
The object of the present invention is to provide a method by which the technical state .. of motors of electric drives can be assessed not only at a given time, but also the transient development of the state is recorded and visualised, so that also statements about an expected maintenance scope can be made and conclusions drawn regarding the causes of the changes in state. Moreover, an apparatus is to be provided, which implements the method.
The method involves a measuring method in which the measured values of motors of electric drives are detected, evaluated and displayed. In particular, the electrical characteristic values of the motor measured by at least one sensor can be used as measured values.
Moreover, framework parameters such as temperature, humidity, etc. can also be measured and integrated in the evaluation. The measured values are transmitted to a data processing system where they are stored and evaluated. In the evaluation, it can be advantageous to process appropriately the measured values. For example, an evaluation function can compare the measured values with reference values under the specified basic conditions, and, as further data to be considered, only use the differences between the measured values and the reference values. Since electric motors such as those in the case of drives for barriers, switches, windows or gates have a cyclic operating pattern, the measured values can be compared with one another as a function of the mechanical position of the driven components over a period of several control cycles. For example, if the start-up characteristic of the motor changes due to wear-induced sluggishness of the mechanism, the power consumption requirement of the drive gradually increases over time. In order to recognise such a trend at an early stage, the data have to be compared over a long period. In a display of the data on a two-dimensional screen or on a two-dimensional paper printout, a multidimensional representation is only clear Date Recue/Date Received 2022-02-07
The object of the present invention is to provide a method by which the technical state .. of motors of electric drives can be assessed not only at a given time, but also the transient development of the state is recorded and visualised, so that also statements about an expected maintenance scope can be made and conclusions drawn regarding the causes of the changes in state. Moreover, an apparatus is to be provided, which implements the method.
The method involves a measuring method in which the measured values of motors of electric drives are detected, evaluated and displayed. In particular, the electrical characteristic values of the motor measured by at least one sensor can be used as measured values.
Moreover, framework parameters such as temperature, humidity, etc. can also be measured and integrated in the evaluation. The measured values are transmitted to a data processing system where they are stored and evaluated. In the evaluation, it can be advantageous to process appropriately the measured values. For example, an evaluation function can compare the measured values with reference values under the specified basic conditions, and, as further data to be considered, only use the differences between the measured values and the reference values. Since electric motors such as those in the case of drives for barriers, switches, windows or gates have a cyclic operating pattern, the measured values can be compared with one another as a function of the mechanical position of the driven components over a period of several control cycles. For example, if the start-up characteristic of the motor changes due to wear-induced sluggishness of the mechanism, the power consumption requirement of the drive gradually increases over time. In order to recognise such a trend at an early stage, the data have to be compared over a long period. In a display of the data on a two-dimensional screen or on a two-dimensional paper printout, a multidimensional representation is only clear Date Recue/Date Received 2022-02-07
3 when the information is processed. This takes place according to the invention, in that two time coordinates are considered. The measured values within a rev-olution cycle of the drive are described as a function of one time coordinate, which is referred to as the rotation time Tu. The second time coordinate is des-ignated as the comparison time Tv and it indicates the time of each individual revolution. Two or more successive revolutions of the drive thus occur at two or more different time points Tvi and Tv2 etc. At each of these times, there is a measured value characteristic during one revolution z = frv,(Tu). In order to de-scribe the dependency of the data on both time coordinates, both coordinate axes according to the invention are selected perpendicularly to one another.
In x-direction, for example, Tv can be represented, while the y-direction is charac-terised by T. Now, on a two-dimensional display plane to be able to display the values of the data in the coordinate system belonging to each (yi; zi) pair, a perspective representation could be selected. However, since this can quickly become obscure, a projection of the z-axis on the x-y plane according to the invention is considered. In order to be able to display information about the nu-merical values of the data, the zi-values are colour-coded. The sequence of coloured data points in the y-direction indicates the difference between the data value and the reference value within a revolution time Tu, which was measured at time Tv; during a revolution. During the next revolution of the actuator in the same direction, the data values at Tv(j+i) are displayed in the same manner.
Since the (y(i+1); z(i+1)) pairs of values are shifted parallel to the (yi;
zi) pairs of values in the direction of the Tv-axis, both measurements are shown side by side and can easily be compared with one another for evaluation. Data values for the same phases of the changeover operation for different setting processes always lie on a parallel to Tv-axis. Thus, the development of the measured val-ues at each phase of the changeover process can be efficiently evaluated by analysing the development of the colour along parallels to the x- and/or Tv-axis.
Particularly advantageously, the information quantity is therefore reduced in that not every single z-value, but only certain value classes, which are oriented towards defined tolerance values for the data, is coded. By comparing the data with reference values and a specification of one to a few tolerance ranges, a meaningful representation is achieved with the aid of a few colour values.
Based on the colour of the data point, the tolerance limit exceeded by the data point (y; z) is therefore visible.
In x-direction, for example, Tv can be represented, while the y-direction is charac-terised by T. Now, on a two-dimensional display plane to be able to display the values of the data in the coordinate system belonging to each (yi; zi) pair, a perspective representation could be selected. However, since this can quickly become obscure, a projection of the z-axis on the x-y plane according to the invention is considered. In order to be able to display information about the nu-merical values of the data, the zi-values are colour-coded. The sequence of coloured data points in the y-direction indicates the difference between the data value and the reference value within a revolution time Tu, which was measured at time Tv; during a revolution. During the next revolution of the actuator in the same direction, the data values at Tv(j+i) are displayed in the same manner.
Since the (y(i+1); z(i+1)) pairs of values are shifted parallel to the (yi;
zi) pairs of values in the direction of the Tv-axis, both measurements are shown side by side and can easily be compared with one another for evaluation. Data values for the same phases of the changeover operation for different setting processes always lie on a parallel to Tv-axis. Thus, the development of the measured val-ues at each phase of the changeover process can be efficiently evaluated by analysing the development of the colour along parallels to the x- and/or Tv-axis.
Particularly advantageously, the information quantity is therefore reduced in that not every single z-value, but only certain value classes, which are oriented towards defined tolerance values for the data, is coded. By comparing the data with reference values and a specification of one to a few tolerance ranges, a meaningful representation is achieved with the aid of a few colour values.
Based on the colour of the data point, the tolerance limit exceeded by the data point (y; z) is therefore visible.
4 Moreover, it is advantageous if, during the evaluation of the data, attention is drawn to the requirement to investigate the drive. This can then occur, for example, if at least once a data point has reached a tolerance limit to be defined, which is known as evidence of damage or hazard to the drive.
.. Moreover, the data points along a parallel to the comparison time axis are analysed as to whether a change in the data points takes place in the direction of a tolerance limit to be defined. Thus, if a data value, at a particular revolution phase of the drive, gradually exceeds increasingly higher tolerance thresholds, it should be expected that a critical state of the drive is imminent, so that here a message is issued at the output unit, which indicates that the system must be investigated by the service personnel.
According to the invention, an apparatus is provided, which detects, stores, .. evaluates and displays the measured values of motors of electrical drives.
The apparatus consists of at least one measuring sensor that is connected to a data processing system, which has an output unit for displaying the evaluation results as well as means for data input. The measurement data are evaluated by means of the data processing system.
.. In particular, the electrical characteristic values of the motor measured by at least one sensor can be used as measured values. Moreover, the apparatus can also measure framework parameters such as temperature, humidity, etc., and incorporate them in the evaluation.
For the evaluation of the data, it can be advantageous if the apparatus .. appropriately processes the measured values. For example, with the aid of an evaluation function, the apparatus can compare the measured values with reference values under the prevailing framework conditions, and only use the differences between the measured values and the reference values as data to be considered further. The apparatus according to the invention considers two time .. co-ordinates.
It describes the measured values within a revolution cycle of the drive as a function of the revolution time Tu. The second time coordinate is designated as the comparison time Tv and it indicates the time of each individual revolution.
Date Recue/Date Received 2022-02-07 Two or more successive revolutions of the drive thus occur at two or more dif-ferent time points Tv, and Tv2 etc. At each of these times, there is a measured value characteristic during one revolution z = frvi(ru).
The data are represented in a two-dimensional coordinate system with two co-
.. Moreover, the data points along a parallel to the comparison time axis are analysed as to whether a change in the data points takes place in the direction of a tolerance limit to be defined. Thus, if a data value, at a particular revolution phase of the drive, gradually exceeds increasingly higher tolerance thresholds, it should be expected that a critical state of the drive is imminent, so that here a message is issued at the output unit, which indicates that the system must be investigated by the service personnel.
According to the invention, an apparatus is provided, which detects, stores, .. evaluates and displays the measured values of motors of electrical drives.
The apparatus consists of at least one measuring sensor that is connected to a data processing system, which has an output unit for displaying the evaluation results as well as means for data input. The measurement data are evaluated by means of the data processing system.
.. In particular, the electrical characteristic values of the motor measured by at least one sensor can be used as measured values. Moreover, the apparatus can also measure framework parameters such as temperature, humidity, etc., and incorporate them in the evaluation.
For the evaluation of the data, it can be advantageous if the apparatus .. appropriately processes the measured values. For example, with the aid of an evaluation function, the apparatus can compare the measured values with reference values under the prevailing framework conditions, and only use the differences between the measured values and the reference values as data to be considered further. The apparatus according to the invention considers two time .. co-ordinates.
It describes the measured values within a revolution cycle of the drive as a function of the revolution time Tu. The second time coordinate is designated as the comparison time Tv and it indicates the time of each individual revolution.
Date Recue/Date Received 2022-02-07 Two or more successive revolutions of the drive thus occur at two or more dif-ferent time points Tv, and Tv2 etc. At each of these times, there is a measured value characteristic during one revolution z = frvi(ru).
The data are represented in a two-dimensional coordinate system with two co-
5 ordinate axes perpendicular to one another, with Tv as abscissa (x-axis) and Tu as ordinate (y-axis).
On its output unit, the apparatus displays the values of the data belonging to the (yi; zi) pair in the coordinate system by projecting the measured values onto the Tu-axis, thereby colour coding the measured values specified by the zi-values. The sequence of coloured data points in the y-direction indicates the difference between the data value and the reference value within a revolution time Tu, which was measured at time Tv; during a revolution. During the next revolution of the actuator in the same direction, the apparatus displays the data values at Tv(I#1) in the same manner. Since the (y(i+1), z (i+1)) pairs of values are shifted parallel to the (yi; zi) pairs of values in the direction of the Tv-axis, both measurements displayed side by side can be compared easily with one another for evaluation.
The apparatus advantageously reduces the information quantity by not coding each individual measured value in the measuring range with its own colour, but only certain classes of values that conform to defined tolerance values for the data. By comparing the data with reference values and a specification from one to a few tolerance ranges, the apparatus allocates only a few colours to the z-values. Based on the colour of the data point, the tolerance limit exceeded by the data point (y; z) is therefore visible.
During the evaluation of the data, the apparatus advantageously indicates an investigation requirement of the drive. This can then occur, for example, if at least once a data point has reached a tolerance limit to be defined, which is known as evidence of damage or hazard to the drive.
Moreover, the apparatus analyses the data points along a parallel to the com-parison time axis as to whether a change in the data points takes place in the direction of a tolerance limit to be defined. If a data value at a particular revolu-tion phase of the drive gradually exceeds higher tolerance thresholds, the appa-ratus issues a message at the output unit, which indicates that the system must be investigated by the service personnel.
= 6 The invention is explained below in more detail with reference to an exemplary embodiment that is represented by two figures.
Fig. 1 shows, by way of example, the analysis of switches on a railway network of a track-bound traffic system. By means of magnetic field sensors that are designed, for example, as 3D or multi-dimensional magnetic field sensors, the current magnitude and the direction of rotation of the switch drive are deter-mined by means of the measured magnetic fields by a data processing system.
The current curve is used in the analysis of the data as a measure of the slug-gishness of the switch.
In the figure, a single dash is assigned to each 4-wire switch drive cable; 3 switches are thus monitored with the diagnostic apparatus.
The diagnostic apparatus directly measures existing cabling of the respective switch drive, near a clamping strip. The clamping strip between the outer cable and the inner cable is ideal for this purpose.
The measurement data is transmitted by means of a suitable interface. In this example, a 4-20 mA interface is used. Depending on environmental conditions and distances, also, other wire-bound interfaces are possible, as well as wire-less, e.g. radio interfaces.
The control of the measuring process, the preparation of the measured data and the forwarding to a diagnostic system are functions of the connected data processing system.
Fig. 2 shows an exemplary representation of the switch-drive measurement da-ta. The measured current values are subtracted from the reference values of an intact drive stored in a database.
The differences from the reference values, Al, are divided into tolerance rang-es. In this example, none or only slight deviations from the reference value are assigned to the tolerance range TO. Greater deviations correspond to tolerance ranges T1 to T4. When the tolerance range T4 is reached, an acute danger to the operability of the drive exists.
Negative deviations feature a better sluggishness of the drive in comparison to the reference values. These measured values are assigned to tolerance range T-1. Each tolerance range is now assigned its own colour when displaying the measured values.
In this example, the colour green is assigned to the tolerance range TO and thus a match between the measured data and the reference values or it is only .. a minor deviation. Ti to T4, for example, the colours yellow, orange, light red and are assigned dark red, T-1 the colour blue.
The comparison time Tv plotted in the x-direction, the y-direction shows the measured values during a revolution (Tu) of the drive. The movement of the switch drive into a right-hand position is shown, starting from the x- axis, in the middle of the figure, while the data shown from the centre upwards describe a deflection of the drive into the left position. Along the Tv axis, several revolu-tions are displayed side by side. The switch drive comes to the end position after about the same period of revolution TUE. The same phases of the revolu-.. tion are therefore comparable along the parallels to the Tv-axis.
In the lower section of Figure 2 (clockwise), it can be seen how the values gradually deviate from the reference value over several revolutions during ap-proximately half the period of revolution. This can be seen in the fact that in the case of Tu, the colour has migrated from green to yellow over orange in the .. range of half revolution cycle time along a parallel to the Tv-axis. For the first revolutions at the beginning of measurements, the measured value still corre-sponded with the reference value, whereas the number of revolutions was more and more distant from its reference value.
This is an indication that the condition of the drive has deteriorated as corn-pared to the start of the measurements, and thus, there is a need for mainte-nance before the drive reaches a critical state. When analysing the data, an order to inspect the switch is triggered. In this case, a prediction of expected damage history is displayed by comparison with data stored in the database.
Based on this forecast, the optimum maintenance time can be defined.
.. In the upper area of Figure 2 (anti-clockwise), it can be seen, for example, how a sudden transition from green colour values to red takes place. An event has occurred here and damaged the switch, which must be corrected immediately.
Correspondingly, an alarm message is issued and an immediate check of the system is triggered. The spare parts required for repair are determined and dis-played from comparison with the data stored in a database.
On its output unit, the apparatus displays the values of the data belonging to the (yi; zi) pair in the coordinate system by projecting the measured values onto the Tu-axis, thereby colour coding the measured values specified by the zi-values. The sequence of coloured data points in the y-direction indicates the difference between the data value and the reference value within a revolution time Tu, which was measured at time Tv; during a revolution. During the next revolution of the actuator in the same direction, the apparatus displays the data values at Tv(I#1) in the same manner. Since the (y(i+1), z (i+1)) pairs of values are shifted parallel to the (yi; zi) pairs of values in the direction of the Tv-axis, both measurements displayed side by side can be compared easily with one another for evaluation.
The apparatus advantageously reduces the information quantity by not coding each individual measured value in the measuring range with its own colour, but only certain classes of values that conform to defined tolerance values for the data. By comparing the data with reference values and a specification from one to a few tolerance ranges, the apparatus allocates only a few colours to the z-values. Based on the colour of the data point, the tolerance limit exceeded by the data point (y; z) is therefore visible.
During the evaluation of the data, the apparatus advantageously indicates an investigation requirement of the drive. This can then occur, for example, if at least once a data point has reached a tolerance limit to be defined, which is known as evidence of damage or hazard to the drive.
Moreover, the apparatus analyses the data points along a parallel to the com-parison time axis as to whether a change in the data points takes place in the direction of a tolerance limit to be defined. If a data value at a particular revolu-tion phase of the drive gradually exceeds higher tolerance thresholds, the appa-ratus issues a message at the output unit, which indicates that the system must be investigated by the service personnel.
= 6 The invention is explained below in more detail with reference to an exemplary embodiment that is represented by two figures.
Fig. 1 shows, by way of example, the analysis of switches on a railway network of a track-bound traffic system. By means of magnetic field sensors that are designed, for example, as 3D or multi-dimensional magnetic field sensors, the current magnitude and the direction of rotation of the switch drive are deter-mined by means of the measured magnetic fields by a data processing system.
The current curve is used in the analysis of the data as a measure of the slug-gishness of the switch.
In the figure, a single dash is assigned to each 4-wire switch drive cable; 3 switches are thus monitored with the diagnostic apparatus.
The diagnostic apparatus directly measures existing cabling of the respective switch drive, near a clamping strip. The clamping strip between the outer cable and the inner cable is ideal for this purpose.
The measurement data is transmitted by means of a suitable interface. In this example, a 4-20 mA interface is used. Depending on environmental conditions and distances, also, other wire-bound interfaces are possible, as well as wire-less, e.g. radio interfaces.
The control of the measuring process, the preparation of the measured data and the forwarding to a diagnostic system are functions of the connected data processing system.
Fig. 2 shows an exemplary representation of the switch-drive measurement da-ta. The measured current values are subtracted from the reference values of an intact drive stored in a database.
The differences from the reference values, Al, are divided into tolerance rang-es. In this example, none or only slight deviations from the reference value are assigned to the tolerance range TO. Greater deviations correspond to tolerance ranges T1 to T4. When the tolerance range T4 is reached, an acute danger to the operability of the drive exists.
Negative deviations feature a better sluggishness of the drive in comparison to the reference values. These measured values are assigned to tolerance range T-1. Each tolerance range is now assigned its own colour when displaying the measured values.
In this example, the colour green is assigned to the tolerance range TO and thus a match between the measured data and the reference values or it is only .. a minor deviation. Ti to T4, for example, the colours yellow, orange, light red and are assigned dark red, T-1 the colour blue.
The comparison time Tv plotted in the x-direction, the y-direction shows the measured values during a revolution (Tu) of the drive. The movement of the switch drive into a right-hand position is shown, starting from the x- axis, in the middle of the figure, while the data shown from the centre upwards describe a deflection of the drive into the left position. Along the Tv axis, several revolu-tions are displayed side by side. The switch drive comes to the end position after about the same period of revolution TUE. The same phases of the revolu-.. tion are therefore comparable along the parallels to the Tv-axis.
In the lower section of Figure 2 (clockwise), it can be seen how the values gradually deviate from the reference value over several revolutions during ap-proximately half the period of revolution. This can be seen in the fact that in the case of Tu, the colour has migrated from green to yellow over orange in the .. range of half revolution cycle time along a parallel to the Tv-axis. For the first revolutions at the beginning of measurements, the measured value still corre-sponded with the reference value, whereas the number of revolutions was more and more distant from its reference value.
This is an indication that the condition of the drive has deteriorated as corn-pared to the start of the measurements, and thus, there is a need for mainte-nance before the drive reaches a critical state. When analysing the data, an order to inspect the switch is triggered. In this case, a prediction of expected damage history is displayed by comparison with data stored in the database.
Based on this forecast, the optimum maintenance time can be defined.
.. In the upper area of Figure 2 (anti-clockwise), it can be seen, for example, how a sudden transition from green colour values to red takes place. An event has occurred here and damaged the switch, which must be corrected immediately.
Correspondingly, an alarm message is issued and an immediate check of the system is triggered. The spare parts required for repair are determined and dis-played from comparison with the data stored in a database.
Claims (6)
1. Method for detecting, evaluating and displaying of measurement values of motors of electric drives, wherein measurement values are determined by at least one sensor, which are transmitted to a data processing system characterised in that two time coordinates are considered, wherein the measurement values within one revolution cycle of the drive are described as a function of a first coordinate (revolution time) and the successive revolutions of the drive are described as a function of a second coordinate (comparative time), wherein data corresponding to the measurement values of a revolution cycle of the electric drive are stored and if necessary, processed by means of an evaluation function, the data then being compared with a reference curve, wherein the deviations between the data and the reference curve are colour-coded and displayed on an output unit in such a way that the two time coordinates are depicted perpendicular to each other and for each data point the colour corresponding to the deviation from a reference value is displayed on the revolution-time axis so that in the case of several measurement cycles a successive series of the colour-coded data points results.
2. Method for detecting, evaluating and displaying of measurement values of motors of electric drives according to claim 1, wherein the coding of the colour values for the deviations of the data from reference values is selected as function of tolerance ranges such that owing to the colour of the data point when data is output, it is apparent, which tolerance limit is exceeded by the measurement values at the respective data point.
3. Method for detecting, evaluating and displaying of measurement values of motors of electric drives according to one of the preceding claims 1 to 2, wherein an investigation requirement of the drive is drawn to attention, when at least once a data point has reached a tolerance limit to be defined or when the comparison of data points along a parallel to a comparison-time axis results in a change of the data points in the direction of a tolerance limit to be defined.
Date Recue/Date Received 2022-02-07
Date Recue/Date Received 2022-02-07
4. Apparatus for the detecting, evaluating and displaying of measurement values of motors of electric drives, wherein at least one sensor measures measurement values and transmits them to a data processing system, characterised in that the data processing system is set up to use time coordinates for the evaluation, wherein the measurement values within a revolution cycle of the drive are described as a function of the first time coordinate (revolution time), and successive revolutions of the drive are described as a function of the second time coordinate (comparison time), wherein data corresponding to the measurement values of a revolution cycle of the electric drive are stored and, if necessary, processed by means of an evaluation function, the data then being compared with a reference curve, wherein the deviations between the data and the reference curve are colour coded and displayed on an output unit such that the two time coordinates are depicted perpendicular to each other, thereby displaying on the revolution-time axis, for each data point, the colour corresponding with the deviation from a reference value, so that a successive series of the colour-coded data points results in the case of several measurement cycles.
5. Apparatus for the detecting, evaluating and displaying of measurement values of motors of electric drives according to claim 4, wherein the data processing system is configured in such a way that it selects the coding of the colour values for the deviations of data from reference values as a function of tolerance ranges, so that based on the colour of the data point at the output unit, it is apparent which tolerance limit the measurement values exceed at the respective data point.
6. Apparatus for the detection, evaluation and display of measurement values of motors of electric drives according to one of the preceding claims 4 to 5, wherein the data processing system is configured in such a way that it indicates an investigation requirement of the drive by means of a message, if at least once a data point reaches a given tolerance limit or when the comparison of data points along a parallel to the comparison-time axis results in a change of the data points in the direction of the given tolerance limit .
Date Recue/Date Received 2022-02-07
Date Recue/Date Received 2022-02-07
Applications Claiming Priority (3)
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| DE102014223251.1 | 2014-11-14 | ||
| DE102014223251.1A DE102014223251B3 (en) | 2014-11-14 | 2014-11-14 | Method and device for detecting, evaluating and displaying measured values of motors of electric drives |
| PCT/EP2015/075443 WO2016074967A1 (en) | 2014-11-14 | 2015-11-02 | Method and apparatus for detecting, evaluating and displaying measurement values of motors of electric drives |
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| CA2970403A1 CA2970403A1 (en) | 2016-05-19 |
| CA2970403C true CA2970403C (en) | 2023-12-19 |
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| DE102018211846A1 (en) * | 2018-07-17 | 2020-01-23 | Ziehl-Abegg Se | Method and system for evaluating the vibration behavior of an electric motor |
| DE102018220804A1 (en) * | 2018-12-03 | 2020-06-04 | Lufthansa Technik Aktiengesellschaft | Condition monitoring method and device |
| KR102112871B1 (en) * | 2019-07-01 | 2020-06-04 | 서준식 | Motor inspection system |
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| DE1506630B2 (en) * | 1967-04-15 | 1972-01-27 | Dormer AG, 7990 Friedrichshafen | FLIGHT INSTRUMENTATION WITH ELECTRONIC. DISPLAY |
| JPS5862515A (en) * | 1981-10-09 | 1983-04-14 | Honda Motor Co Ltd | Indicator for vehicle |
| NO843698L (en) * | 1984-09-17 | 1986-03-18 | Norway Geophysical Co | PROCESS FOR PROCESSING SEISMIC DATA. |
| JPH06103310B2 (en) * | 1985-06-26 | 1994-12-14 | 株式会社日立製作所 | Display method of quality control data of automatic analyzer |
| DE59503378D1 (en) * | 1994-10-26 | 1998-10-01 | Siemens Ag | METHOD FOR ANALYZING A MEASURED VALUE AND MEASURED VALUE ANALYZER FOR IMPLEMENTING THE METHOD |
| DE19733001A1 (en) * | 1997-07-31 | 1999-02-04 | Volkswagen Ag | Process for recording, evaluating and displaying measured values |
| KR20090030902A (en) * | 2007-09-21 | 2009-03-25 | 엘지전자 주식회사 | Input apparatus of dish washer and controlling method for the same, input apparatus of laundry machine and controlling method for the same |
| JP5243910B2 (en) * | 2008-09-29 | 2013-07-24 | 本田技研工業株式会社 | Device for instructing the driver on driving operation to improve fuel efficiency |
| AU2010245179B2 (en) * | 2009-04-27 | 2015-10-08 | Smith & Nephew, Inc. | System and method for identifying a landmark |
| DE102009023867A1 (en) * | 2009-06-04 | 2010-12-09 | Bayerische Motoren Werke Aktiengesellschaft | Method for providing information e.g. number of revolutions, to driver of motor vehicle, involves showing information about past driving behavior of driver in indicating region i.e. inner shell, of indicator |
| DE102009035998A1 (en) * | 2009-07-27 | 2011-02-03 | Pilz Gmbh & Co. Kg | Method and device for fail-safe monitoring of a movement quantity on an electric drive |
| DE102010033459A1 (en) * | 2009-08-11 | 2011-06-09 | Diehl Ako Stiftung & Co. Kg | Method for error detection in the control of a rotating field motor |
| DE102010055797A1 (en) * | 2010-12-23 | 2012-06-28 | Continental Automotive Gmbh | Electric motor vehicle with a display device |
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| EP3218675A1 (en) | 2017-09-20 |
| CA2970403A1 (en) | 2016-05-19 |
| SI3218675T1 (en) | 2019-05-31 |
| KR20170092572A (en) | 2017-08-11 |
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| WO2016074967A1 (en) | 2016-05-19 |
| EP3218675B1 (en) | 2019-01-09 |
| LT3218675T (en) | 2019-04-10 |
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