EP3631832A1 - Elektromechanisches relais zum bestimmen einer position eines ankers - Google Patents
Elektromechanisches relais zum bestimmen einer position eines ankersInfo
- Publication number
- EP3631832A1 EP3631832A1 EP18722584.2A EP18722584A EP3631832A1 EP 3631832 A1 EP3631832 A1 EP 3631832A1 EP 18722584 A EP18722584 A EP 18722584A EP 3631832 A1 EP3631832 A1 EP 3631832A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- armature
- flux density
- magnetic field
- electromechanical relay
- magnetic flux
- 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.)
- Granted
Links
- 230000004907 flux Effects 0.000 claims abstract description 134
- 230000005284 excitation Effects 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims description 26
- 230000004044 response Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000013519 translation Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 23
- 230000001419 dependent effect Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 230000036962 time dependent Effects 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005314 correlation function Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
- H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/002—Monitoring or fail-safe circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
- H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current
- H01H2047/046—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current with measuring of the magnetic field, e.g. of the magnetic flux, for the control of coil current
Definitions
- Electromechanical relay for determining a position of an anchor
- Monitoring an operating state of an electromechanical relay For detecting and monitoring an operating state of an electromechanical relay are various mechanical characteristics, such as a hub or a
- Angle of rotation of the armature the electromechanical relay of importance. Further, contact events of the electromechanical relay, such as opening and closing of contacts, are of interest at certain positions of the armature. Furthermore, this can be used to determine a burnup of the contacts of the electromechanical relay.
- the position of the armature is determined at the open relay with a suitable mechanical measuring device.
- a force sensor can be moved by means of a linear drive with a displacement sensor to record a force-displacement curve.
- an open relay is required, so this approach is unsuitable for the ongoing operation of the electromechanical relay.
- magnetic sensors can be used to determine a position of the armature.
- these approaches are only suitable for detecting a respective end position of the armature, and can the required resolution for the determination of
- the invention is based on the finding that the above object is achieved by a
- electromechanical relay can be solved, which comprises a memory with a predetermined characteristic field, which can be determined in advance using a meta-model.
- the meta model takes into account one
- the predetermined characteristic field can in particular indicate an assignment of a value pair from a reference electrical current and a reference magnetic flux density to a reference position of the armature. Accordingly, by detecting a current through the exciting coil and detecting a magnetic flux density of a magnetic field in an environment of the armature, the position of the armature can be accurately determined at any time using the aforementioned assignment.
- the invention relates to an electromechanical relay for determining a position of an armature, wherein the armature is designed to close a circuit of the electromechanical relay.
- the electromechanical relay includes an excitation coil configured to generate a magnetic field in response to an electrical current through the excitation coil, the magnetic field extending to the armature.
- the electromechanical relay further comprises a
- the electromechanical relay further comprises a memory in which a predetermined characteristic field is stored, wherein the predetermined
- Characteristic field indicates at least one assignment of a reference electrical current and a reference magnetic flux density to a reference position of the armature, and a processor, which is configured to compare the detected electric current with the reference electric current, to compare the detected magnetic flux density with the reference magnetic flux density, and the Position of the anchor on the basis of
- the at least one assignment thus forms a value pair comprising an electrical reference current and a reference magnetic flux density to a reference position of the armature.
- the predetermined characteristic map may indicate a plurality of such assignments.
- the magnetic field detection device is adapted to detect a further magnetic flux density of the magnetic field in the vicinity of the armature, wherein the predetermined characteristic field indicates at least one assignment of a reference electrical current, a reference magnetic flux density and another reference magnetic flux density to a reference position of the armature, and wherein the processor is configured to compare the detected further magnetic flux density with the further reference magnetic flux density.
- the at least one assignment thus forms a value triplet comprising an electrical reference current, a reference magnetic flux density and another magnetic
- Characteristic field can display a plurality of such assignments.
- the magnetic flux density is associated with a magnetic field direction
- the further magnetic flux density is associated with a further magnetic field direction
- the magnetic field direction and the further magnetic field direction are perpendicular to each other.
- the magnetic field detection device comprises a
- the magnetic field detection device comprises a
- Magnetic field sensor and another magnetic field sensor wherein the magnetic field sensor is adapted to detect the magnetic flux density, and wherein the further
- Magnetic field sensor is designed to detect the further magnetic flux density.
- the magnetic field sensor and the further magnetic field sensor are arranged on opposite sides of the armature.
- the magnetic field detection device is designed to detect at least one magnetic flux density in an air gap between the armature and an inner surface of the electromechanical relay.
- the magnetic field detection device is designed to detect the further magnetic flux density in a further air gap between the armature and a further inner surface of the electromechanical relay.
- the electromechanical relay comprises a
- Magnetic field detection device is arranged on the plastic surface.
- Plastic surface is reduced or avoided influencing the magnetic field in the vicinity of the armature.
- the electromechanical relay comprises a
- Communication interface which is adapted to receive the predetermined characteristic field from a calibration device, and store the predetermined characteristic field in the memory.
- a calibration of the electromechanical relay can take place during the production of the electromechanical relay.
- the calibration device may determine and provide the predetermined characteristic map.
- the predetermined characteristic field is stored in the form of a look-up table in the memory.
- the processor is configured to be the predetermined one
- Characteristic field to interpolate may be performed using the at least one mapping determined by the predetermined one
- the armature is a rocker armature.
- the electromechanical relay may thus be an electromechanical rocker armature relay.
- the position of the armature represents a deflection of a reference point of the armature.
- the anchor reference point may be at one end of the anchor, for example.
- the position of the armature represents a rotation angle of the armature about a reference point of the armature.
- the anchor reference point may be in the middle of the anchor, for example.
- the processor is configured to determine an overstroke of the armature based on the position of the armature and a predetermined ratio factor.
- the predetermined transmission factor will depend on the arrangement of the armature in the electromechanical relay.
- the processor is configured to determine a contact spacing of the armature based on the position of the armature and a predetermined ratio factor.
- the predetermined transmission factor will depend on the arrangement of the armature in the electromechanical relay.
- the invention relates to a method for determining a position of an armature of an electromechanical relay, wherein the armature is designed to close a circuit of the electromechanical relay.
- the electromechanical relay comprises an excitation coil, a current detection device, a
- Magnetic field detection device a memory and a processor.
- the exciting coil is configured to generate a magnetic field in response to an electric current through the exciting coil, wherein the magnetic field extends to the armature.
- a predetermined characteristic field is stored, wherein the predetermined
- Characteristic field displays at least one assignment of an electrical reference current and a magnetic reference flux density to a reference position of the armature.
- the method comprises detecting the electric current through the exciting coil by the current detecting means, detecting at least a magnetic flux density of the magnetic field in an environment of the armature through the
- Magnetic field detecting means comparing the detected electric current with the reference electric current by the processor, comparing the detected magnetic flux density with the reference magnetic flux density by the processor, and determining the position of the armature on the basis of the reference position of the armature by the processor.
- the method can be performed by the electromechanical relay. Other features of the method result directly from the features or functionality of the electromechanical relay.
- the invention relates to a computer program with a
- the electromechanical relay may be program-programmed to execute the computer program.
- the invention can be implemented in hardware and / or software.
- FIG. 1 is a schematic diagram of an electromechanical relay for determining a position of an armature
- FIG. 2 is a schematic diagram of a method for determining a position of an armature of an electromechanical relay
- Fig. 3a is a schematic diagram of an electromechanical relay for determining a position of an armature
- Fig. 3b is a schematic diagram of an electromechanical relay for determining a position of an armature
- 4a is a schematic diagram of a magnetic flux density in response to a position of an armature and an electric current through an exciting coil.
- 4b is a schematic diagram of a magnetic flux density as a function of a position of an armature and an electric current through an exciting coil.
- 4c is a schematic diagram of a magnetic flux density in response to a position of an armature and an electric current through an exciting coil;
- Fig. 4d is a schematic diagram of a magnetic flux density in response to a position of an armature and an electric current through an exciting coil;
- 4e is a schematic diagram of an electric current through an exciting coil as a function of time
- Fig. 5 is a schematic diagram of an electromechanical relay for determining a position of an armature
- Fig. 6a is a schematic diagram of a position of an armature in response to an electric current through an exciting coil and a magnetic flux density
- Fig. 6b is a schematic diagram of a position of an armature in response to an electric current through an exciting coil and a magnetic flux density
- FIG. 7 is a schematic diagram of a determination of a position of an armature in FIG.
- FIG. 1 shows a schematic diagram of an electromechanical relay 100 for determining a position of an armature, wherein the armature is configured to close a circuit of the electromechanical relay 100.
- the electromechanical relay 100 includes an exciting coil 101 which is configured to generate a magnetic field in response to an electric current through the exciting coil 101, the magnetic field extending to the armature.
- Electromechanical relays 100 further include a current detecting means 103 adapted to detect the electric current through the exciting coil 101, and a magnetic field detecting means 105 configured to detect at least a magnetic flux density of the magnetic field in an environment of the armature.
- the electromechanical relay 100 further comprises a memory 107 in which a predetermined characteristic field is stored, the predetermined characteristic field indicating at least one assignment of a reference electrical current and a reference magnetic flux density to a reference position of the armature, and a processor 109 configured to detect the detected one electric current with the electric To compare reference current, to compare the detected magnetic flux density with the reference magnetic flux density, and the position of the armature on the basis of
- the electromechanical relay comprises an excitation coil, a current detection device, a
- Magnetic field detection device a memory and a processor.
- the exciting coil is configured to generate a magnetic field in response to an electric current through the exciting coil, wherein the magnetic field extends to the armature.
- a predetermined characteristic field is stored, wherein the predetermined
- Characteristic field displays at least one assignment of an electrical reference current and a magnetic reference flux density to a reference position of the armature.
- the method 200 includes detecting 201 the electric current through the
- An exciting coil by the current detecting means detecting 203 at least one magnetic flux density of the magnetic field in an environment of the armature by the magnetic field detecting means, comparing 205 the detected electric current with the reference electric current through the processor, comparing 207 the detected magnetic flux density with the reference magnetic flux density by the processor, and determining the position of the armature 209 on the basis of
- FIG. 3 a and 3b each show a schematic diagram of an electromechanical relay 100 for determining a position of an armature 301.
- the armature 301 is in a first end position and in FIG. 3 b the armature 301 is in a second end position.
- the armature 301 is designed to open and close a circuit, in particular a load circuit, of the electromechanical relay 100.
- the armature 301 is designed as an exemplary rocker armature.
- the electromechanical relay 100 includes an excitation coil configured to generate a magnetic field in response to an electrical current through the excitation coil, the magnetic field extending to the armature.
- Electromechanical relay 100 further comprises a current detecting means, which is adapted to detect the electric current through the exciting coil, and a magnetic field detecting means, which is formed, at least one magnetic To detect flux density of the magnetic field in an environment of the armature 301.
- the electromechanical relay 100 also includes a memory in which a
- predetermined characteristic field is stored, wherein the predetermined characteristic field indicates at least one assignment of a reference electrical current and a reference magnetic flux density to a reference position of the armature 301, and a processor which is adapted to the detected electric current with the electric
- the magnetic flux density can be detected, for example, in or in the vicinity of an air gap ("air gap 1") or in or in the vicinity of another air gap (“air gap 2”), wherein the air gap between the armature 301 and an inner surface of the air gap
- electromechanical relay 100 is arranged, and wherein the further air gap between the armature 301 and another inner surface of the electromechanical relay 100 is arranged.
- the concept according to the invention allows the intensity and optionally the direction of the magnetic flux to be detected and / or calculated at at least one location in the electromechanical relay 100 at different positions of the armature 301 and different electrical currents through the exciter coil.
- FIGS. 4a to 4d each show a schematic diagram of a magnetic
- Fig. 4a shows the magnetic flux density in the x-direction at a first location in the electromechanical relay.
- Fig. 4b shows the magnetic flux density in the x-direction at a second location in the
- Fig. 4c shows the magnetic flux density in the z direction at the first location in the electromechanical relay.
- Fig. 4d shows the magnetic flux density in the z-direction at the second location in the electromechanical relay. The magnetic flux density is determined using a regression, respectively.
- Connections and repercussions are typically nonlinear and unknown Angle of rotation or the unknown position of the anchor and the time and
- 4e shows a schematic diagram of an electric current through a
- a first reaction is by a
- Closing a first contact causes.
- a second reaction is caused by the anchor impact.
- the correlation between the electrical current through the excitation coil and the excitation and the position of the armature to the (optionally directional) magnetic flux density B x and B z can be high and close to 100% (see also Fig. 4a to Fig. 4d ). Accordingly, a corresponding correlation function can also be switched and the position of the armature in dependence on the electric current through the
- Excitation coil and the excitation and the magnetic flux density Bx, Bz and / or By are shown.
- 5 shows a schematic diagram of an electromechanical relay 100 for determining a position of an armature 301.
- the armature 301 is formed, a
- the electromechanical relay 100 to open and close.
- the armature 301 is designed as an exemplary rocker armature.
- the electromechanical relay 100 includes an exciting coil configured to generate a magnetic field in response to an electric current through the exciting coil, the magnetic field extending to the armature 301.
- Electromechanical relay 100 further comprises a current detecting means, which is adapted to detect the electric current through the exciting coil, and a magnetic field detecting means, which is formed, a magnetic flux density of the magnetic field in an environment of the armature 301 and another magnetic To detect flux density of the magnetic field in the vicinity of the armature 301.
- the electromechanical relay 100 also includes a memory in which a
- predetermined characteristic field is stored predetermined characteristic field, wherein the predetermined characteristic field at least one assignment of an electrical reference current, a magnetic
- Indicates reference position of the armature and a processor, which is configured to compare the detected electric current with the reference electric current, to compare the detected magnetic flux density with the reference magnetic flux density, the detected further magnetic flux density with the other magnetic
- the at least one assignment consequently forms a value triplet comprising an electrical reference current, a reference magnetic flux density and a further reference magnetic flux density to a reference position of the armature.
- Characteristic field can display a plurality of such assignments.
- the processor may be configured to interpolate the predetermined characteristic field.
- the magnetic flux density is associated with a magnetic field direction, wherein the further magnetic flux density is associated with a further magnetic field direction.
- Magnetic field direction and the further magnetic field direction may be perpendicular to each other.
- Coordinate system run and can extend the further magnetic field direction along a z-axis of the coordinate system.
- the magnetic flux density and the further magnetic flux density can consequently be detected depending on the direction.
- the magnetic field detection device comprises a magnetic field sensor 501 and a further magnetic field sensor 503, wherein the magnetic field sensor 501 is designed to detect the magnetic flux density, and wherein the further magnetic field sensor 503 is designed to detect the further magnetic flux density.
- the magnetic field sensor 501 is designed to detect the magnetic flux density
- the further magnetic field sensor 503 is designed to detect the further magnetic flux density.
- Magnetic field detecting means comprise only a magnetic field sensor 501, 503, wherein the magnetic field sensor 501, 503 is adapted to detect both the magnetic flux density and the further magnetic flux density.
- the magnetic field detection device in particular the magnetic field sensor 501, is designed to detect the magnetic flux density in an air gap between the armature 301 and an inner surface of the electromechanical relay 100.
- the Magnetic field detection device in particular the further magnetic field sensor 503, is designed to detect the further magnetic flux density in a further air gap between the armature 301 and a further inner surface of the electromechanical relay 100.
- the electromechanical relay 100 may comprise a plastic surface which is arranged in the vicinity of the armature 301, wherein the magnetic field detection device, in particular the magnetic field sensor 501 and / or the further magnetic field sensor 503, is arranged on the plastic surface.
- the magnetic field detection device in particular the magnetic field sensor 501 and / or the further magnetic field sensor 503, is arranged on the plastic surface.
- Magnetic field sensor 503 are disposed on opposite sides of the armature.
- Flux density B x , B z , and / or B y at at least one prominent location in the electromechanical relay 100 to determine the position of the armature 301 at arbitrary times, including during movement of the armature 301 and under any variable current excitation conditions.
- the application in an electromechanical relay 100 with a rocker armature as anchor 301 may be particularly advantageous because of the two
- Positions of the armature are present (see also Fig. 3a and Fig. 3b).
- AW anchor angle
- APos the position of the armature in the form of a deflection of the armature
- the quantities of the (optionally direction-dependent) magnetic flux density B x , B z and / or B y detected by the magnetic field detection device, in particular the sensors 501, 503, are detected by the excitation coil with the detected electrical current of the predetermined characteristic field, in which the correlations of these quantities is mapped evaluated. As a result, the time-dependent position or angle of rotation of the armature 301 is obtained. These correlations are shown by way of example in FIGS. 6a and 6b.
- mappings may include the following
- overstroke translation factor * (position of armature 301 at time contact closes - end position armature 301)
- FIGS. 6a and 6b each show a schematic diagram of a position of an armature in response to an electric current through an exciting coil and a magnetic flux density.
- the position of the armature corresponds by way of example to a rotation angle of the armature about a reference point in the center of the armature.
- Fig. 6a relates to the magnetic flux density in the x direction at a location in the electromechanical relay.
- Fig. 6b relates to the magnetic flux density in the z direction at the location in the electromechanical relay.
- the position of the armature is shown in the form of a surface diagram as a function of the electrical current through the exciting coil and the magnetic flux density, wherein the surface diagram may represent a predetermined characteristic field 601.
- the electric current is referred to as electrical reference current
- the magnetic flux density as the reference magnetic flux density
- the further magnetic flux density as a further reference magnetic flux density
- the position of the armature as the reference position of the armature.
- 7 shows a schematic diagram of a determination of a position of an armature in response to an electric current through an exciting coil, a magnetic flux density, and another magnetic flux density.
- the electric current through the excitation coil (“coil current"), the magnetic flux density (“flux density Bz”) and the other magnetic flux density (“flux density Bx”) are first detected, and the electric current through the excitation coil can be converted into an electrical excitation.
- the electrical current through the excitation coil or the excitation is compared with an electrical reference current, the magnetic
- Flux density is compared to a reference magnetic flux density, and the further magnetic flux density is compared to another reference magnetic flux density, wherein a predetermined family of characteristics 601 relates the reference electrical current, reference magnetic flux density, and other reference magnetic flux density to a reference position of the armature.
- the position of the armature is thus determined based on the reference position of the armature.
- the predetermined characteristic field 601 can be determined beforehand using a cybernetic metamodel.
- AW f (B x (n); B z (n); 1 spute )
- AW is the position of the armature in the form of an angle of rotation of the armature ( arm angle, AW)
- B x the magnetic flux density in the x direction
- B z the further magnetic flux density in the z direction
- n an index
- L SU ie represents the current through the excitation coil or the excitation.
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE2017/5386A BE1025259B1 (de) | 2017-05-31 | 2017-05-31 | Elektromechanisches Relais zum Bestimmen einer Position eines Ankers |
PCT/EP2018/062347 WO2018219624A1 (de) | 2017-05-31 | 2018-05-14 | Elektromechanisches relais zum bestimmen einer position eines ankers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3631832A1 true EP3631832A1 (de) | 2020-04-08 |
EP3631832B1 EP3631832B1 (de) | 2022-03-02 |
Family
ID=59021198
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18722584.2A Active EP3631832B1 (de) | 2017-05-31 | 2018-05-14 | Elektromechanisches relais zum bestimmen einer position eines ankers |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3631832B1 (de) |
BE (1) | BE1025259B1 (de) |
WO (1) | WO2018219624A1 (de) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1252768C (zh) * | 1999-12-03 | 2006-04-19 | 西门子公司 | 带有受控驱动装置的电磁开关设备以及相应方法和电路 |
WO2013186854A1 (ja) * | 2012-06-12 | 2013-12-19 | 富士通株式会社 | 電流センサ |
DE102012106922A1 (de) * | 2012-07-30 | 2014-01-30 | Eaton Electrical Ip Gmbh & Co. Kg | Vorrichtung zum Regeln des elektromagnetischen Antriebs eines Schaltgeräts, insbesondere eines Schützes |
DE102014208014B4 (de) * | 2014-04-29 | 2020-03-19 | Siemens Aktiengesellschaft | Elektrischer Schalter mit elektromagnetischem Aktuator |
-
2017
- 2017-05-31 BE BE2017/5386A patent/BE1025259B1/de active IP Right Grant
-
2018
- 2018-05-14 WO PCT/EP2018/062347 patent/WO2018219624A1/de active Application Filing
- 2018-05-14 EP EP18722584.2A patent/EP3631832B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
BE1025259A1 (de) | 2019-01-03 |
BE1025259B1 (de) | 2019-01-07 |
EP3631832B1 (de) | 2022-03-02 |
WO2018219624A1 (de) | 2018-12-06 |
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