Method for detecting rotor position of rotor part, computer program product and sensor device
By using an initialization and determination phase method, the first angular position of the rotor component is determined using sensor signals and the correction value is obtained. This solves the problems of low sensor accuracy and dependence on external information, and achieves efficient rotor position recognition.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HELLA GMBH & CO KGAA
- Filing Date
- 2024-10-01
- Publication Date
- 2026-05-01
AI Technical Summary
In the existing technology, the sensor needs to be installed on the shaft end with a large diameter, provides a non-unique output signal, and the target angular position is unknown after the sensor restarts, resulting in low rotor position recognition accuracy and dependence on external information.
By using an initialization phase and a determination phase, the first angular position of the rotor component is determined using sensor signals, the original value is stored and the correction value is obtained, and the rotor position is identified by combining error information, thereby reducing reliance on external information.
It improves the accuracy of rotor position recognition, reduces wear on sensors and components, reduces reliance on external information, and achieves efficient rotor position recognition.
Smart Images
Figure CN121969897A_ABST
Abstract
Description
Methods, computer program products, and sensor devices for identifying the position of rotor components. Technical Field
[0001] The present invention relates to a method for identifying the rotor position of a rotor component based on sensor signals from a sensor unit, a computer program product, and a sensor device. Background Technology
[0002] It is known from existing technology to use sensors as MPS (motor position sensors). In part, the sensor should not be mounted on the end of the shaft, but rather almost around the motor or shaft. This requires a sensor with a large diameter.
[0003] Sensors known from existing technology often provide output signals that are not unique across 360°. Furthermore, the target's current angular position may be unknown after the sensor and / or electronics have been restarted. Summary of the Invention
[0004] The object of this invention is to at least partially eliminate the drawbacks known from the prior art. In particular, the object of this invention is to improve the accuracy in identifying the rotor position of rotor components. Furthermore, the object of this invention is to enable accurate identification of the rotor position of rotor components with as little external information as possible, i.e., information from components outside the system.
[0005] The aforementioned objective is achieved by the method having the features of claim 1, the computer program product having the features of claim 14, and the sensor device having the features of claim 15. Further features and details of the invention arise from the dependent claims, the description, and the drawings. The features and details described herein in conjunction with the method according to the invention naturally also apply to the combination with the computer program product and / or the sensor device, and vice versa, so that the disclosures regarding various aspects of the invention are always mutually referenced or can be mutually referenced.
[0006] Various embodiments of the present invention can advantageously provide improved methods. Such methods can eliminate the need for additional information, such as information from the customer or via additional index sensors. Therefore, the method according to the invention can be more cost-effective.
[0007] A first aspect of the present invention relates to a method for identifying the rotor position of a rotor component of a motor vehicle based on sensor signals from a sensor unit. The method includes an initialization phase and a subsequent determination phase.
[0008] The initialization phase consists of the following steps:
[0009] a) Determine the first angular position of the rotor component based on the sensor signal.
[0010] b) Obtain the original value of the first corner position.
[0011] c) Store the sensor signal in the data collection area based on the original value of the first corner position.
[0012] d) Repeat steps a)-c) until the original value of the first corner position has covered at least a portion of the rotation range, and
[0013] e) Calculate the correction value based on the data collection area.
[0014] The determination phase involves the following steps:
[0015] I) Determine the first angular position of the rotor component based on the sensor signal.
[0016] II) Calculate the error information of the expected angle error based on the original value of the first angle position and the correction value, and
[0017] IV) Determine the rotor position of the rotor component based on the error information.
[0018] In other words, a method can be provided in which the necessary information can be obtained during the initialization phase so that the rotor position can be reliably and accurately determined. The initialization phase can be a repetitive sequence of instructions. During the initialization phase, the rotor position of the rotor components can still be determined, although it is preferably noted to the user that the method is still in the initialization phase, and therefore the determination of the rotor position cannot yet achieve the expected accuracy.
[0019] The rotor element is preferably a part of a motor, more preferably an electric motor. The rotor element can be, for example, a wheel axle or shaft. The rotor position can be understood as the rotational position of the rotor element preferably about a predetermined zero position. The zero position can be defined, in particular, by the rotor element and / or a sensor unit. Furthermore, the zero position can be predetermined mechanically and / or electronically. The rotor position can therefore, in particular, relate to the entire range of rotation. Preferably, the rotor position can also be referred to as the corrected absolute angular position of the rotor element, taking into account angular errors.
[0020] Preferably, the sensor unit is configured as a motor position sensor (MPS). Specifically, the sensor unit can be configured for non-contact detection of the first angular position. This reduces wear on the sensor unit and / or the rotor components.
[0021] The sensor signal can be continuous or discontinuous and / or digital or analog. Furthermore, it is conceivable that the sensor signal comprises a single signal, by which only a single value of the first angular position is transmitted. Therefore, the first angular position and / or rotor position can be determined pointwise and / or as a curve. The first angular position can be calculated from the sensor signal during its determination. For example, the sensor signal used to determine the first angular position can be converted and / or scanned. However, it is also conceivable that the sensor signal includes information about the first angular position. The sensor signal preferably has cosine and sine signals, which can be stored in a data collection area. An amplitude signal can be obtained based on the original sine and cosine signals, and this amplitude signal can also be stored in the data collection area. An angle value can be determined within a sub-segment during the determination of the first angular position, wherein, in the context of this disclosure, the sub-segment can be the measurement range of the sensor unit. The sub-segment can, for example, include a predetermined angular range that can be detected by the sensor unit. Therefore, the first angular position can be an angular value between, for example, 0° and 36°. The first angular position can include the rotational position of the rotor element within the sub-segment, particularly with angular error measurement. In particular, the first angular position can also be referred to as the relative measured angular position.
[0022] In contrast, the original value of the first angular position is preferably between 0° and 360°, that is, an angular value within the rotation range.
[0023] The at least portion of the rotation range can be a sub-range of the 0° to 360° rotation range. In principle, it can be advantageous to repeat steps a)-c) until the entire rotation range is covered. However, this can be time-consuming; therefore, it can also be advantageous to cover only a portion of the rotation range, for example, 70% to 80% of the rotation range. This saves time without significantly reducing the accuracy of rotor position identification.
[0024] The expected angular error can be periodic, such as sinusoidal. The expected angular error can be determined pointwise and / or as a curve. Specifically, the expected angular error has a relationship with the first angular position and / or its positioning within the rotation range. The positioning of the first angular position within the rotation range can be inferred from the correction value, thereby determining the expected angular error.
[0025] The error information may include a preferred predetermined value for the expected angular error. However, it is also conceivable that the error information includes the configured rotor position, and in particular, a value configured for the rotor position based on the position information of the first angular position.
[0026] During the determination phase, obtaining the expected angular error information may involve retrieving data from a database. The rotor position can be determined based on the angular error and the initial angular position. For example, the initial angular position can be corrected using the angular error. It can be specified that the rotor position is provided for manipulating rotor components. For example, the motor can be controlled based on the rotor position.
[0027] This method can improve the accuracy of rotor position identification by taking angular errors into account.
[0028] According to one embodiment of the method, the initialization phase is performed once, particularly when the motor vehicle is started.
[0029] According to one embodiment of the method, when obtaining the initial value of the first angular position, the first angular position relates to a rotational range. In other words, the first angular position can relate to a sub-segment, and the initial value of the first angular position can relate to a rotational range. Therefore, the initial value can be taken as a value within the entire rotational range of 0° to 360°. It should be noted that the term "initial value" in the context of this disclosure should refer to the angle value provided by the initial value of the first angular position, which has not yet been corrected. Based on the obtained initial value, it can be determined where the sensor signal should be stored in the data collection area or at which grid point.
[0030] According to one embodiment of the method, a first phase in the current operating cycle is obtained while obtaining a correction value. Additionally, a second phase in the simulated operating cycle is obtained or retrieved. For this purpose, it can be specified that a moving average of the stored original values of the first angle positions is obtained at each first angle position within a predetermined range, or for each predetermined angle position within the entire rotation range. The predetermined range of rotation can then be shifted over the entire rotation range to derive the curve trajectory. In other words, an amplitude curve can be derived from multiple obtained original values within the predetermined range of rotation. A characteristic minimum can be determined or obtained from the curve trajectory or amplitude curve. The first phase in the current operating cycle can then be obtained from the characteristic minimum.
[0031] The process for determining the second phase is similar to that for determining the first phase, the difference being that the curve trajectory can be obtained from simulated vehicle conditions. The simulated vehicle conditions are preferably the measurement process described above, which can be implemented during production or the manufacturing of the motor vehicle.
[0032] According to one embodiment of the method, the correction value is obtained based on the difference between the first phase and the second phase. In other words, the difference between the first phase and the second phase can be calculated, thereby obtaining the correction value.
[0033] In one embodiment of the method, the difference between the first phase and the second phase is rounded to a multiple of the sub-segment. In other words, this difference can be rounded to a multiple of the sensor's physical measurement range. A correction value is then derived.
[0034] According to one embodiment of the method, the data collection area is divided into a predetermined number of grid points. Each grid point is assigned an original value corresponding to an angle value of at least a portion of the rotation range. The size of the data collection area can therefore be determined by the resolution of the rotation range. The higher the resolution of the sub-segments, the more grid points the data collection area can have. In other words, grid points can be provided across the entire 0° to 360° range. The number of grid points determines cost and storage requirements. Furthermore, the data collection area can have a matrix with a predetermined number of vectors, where each vector has attributes. The attributes of the vectors are preferably the difference between the original value at the determined first angular position and the nominal value of the grid point, a check value, and a sensor signal. The check value is preferably a binary value. The check value determines whether a vector or grid point has been filled. If no value has been stored for the determined angular position, the check value reflects this.
[0035] According to one embodiment of the method, in step d), monitoring, particularly by a monitoring unit, is conducted to determine whether the data collection area, and specifically each grid point of the data collection area, is filled with the stored sensor signals. After the data collection area may have multiple grid points—corresponding to the resolution of at least a portion of the rotation range—if the rotation range is not fully covered, but only, for example, 70% to 80%, then the initialization phase can be concluded. Alternatively, the data collection area may have multiple grid points, corresponding to the resolution of the entire rotation range. In such an embodiment of the data collection area, it is conceivable that if, for example, the grid points of the data collection area are filled between 70% and 80%, then the initialization phase is concluded.
[0036] According to one embodiment of the method, if the initialization phase ends, and in particular, the initialization phase has ended, then a status signal is output. This notifies the user whether the initialization phase has ended, and if the initialization phase has ended, the user can then determine the expected accuracy in rotor position identification.
[0037] According to one embodiment of the method, the initialization phase further includes the following steps:
[0038] f) Determine the rotor position of the relevant sub-section of the rotor component based on the first angular position.
[0039] In one embodiment of the method, a calibration process is performed, during which the expected angular error with respect to the rotation range is determined and the error information is recorded in a database. In other words, the database, also known as a lookup table, can be populated using the calibration process. The calibration process can be separated from the initialization phase.
[0040] According to one embodiment of the method, the sensor unit is configured as an inductive sensor. Furthermore, the sensor unit includes a conductor element that is non-rotatably connected to the rotor component and a sensor element for inductively detecting the conductor element to detect a first angular position.
[0041] In one embodiment of the method, the rotor is a vehicle axle. The invention further relates to a vehicle having a rotor, wherein the rotor position of the rotor can be identified by means of the methods described above and below.
[0042] A second aspect of the invention relates to a computer program product comprising instructions that, when executed by a control unit, cause the control unit to perform the methods described above and below.
[0043] Therefore, the computer program product according to the invention brings with it the same advantages as described in detail with reference to the method according to the invention. The method can in particular be a computer-implemented method. The computer program product can be implemented as computer-readable command code. Furthermore, the computer program product can be stored on a computer-readable storage medium, such as a data disk, a replaceable drive, volatile or non-volatile memory, or an installed memory / processor. Moreover, the computer program product can be provided or made available on a network, such as the Internet, whereby it can be downloaded or executed online by a user when needed. The computer program product can be implemented not only by means of software but also by means of one or more dedicated electronic circuits, i.e., in hardware or in any hybrid form, i.e., by means of software components and hardware components.
[0044] A third aspect of the invention relates to a sensor device, the computer program product being used to identify the rotor position of a rotor component within a rotational range. The sensor device comprises: a sensor unit for detecting a first angular position at least in a sub-segment of the rotor component; and a control unit for performing the methods described above and below.
[0045] In one embodiment of the sensor device, the rotor element has rotor blades and is rotationally symmetrical. Specifically, the rotor element has special rotor blades that differ from the other rotor blades. This allows for the acquisition of the curve direction or amplitude curve direction as further explained above and below. In other words, the rotor element can have rotor blades that possess special characteristics compared to other rotor blades. Here, the blades can have a different geometry than the other rotor blades. Such special rotor blades may, for example, have an inclined plane or be smaller than the other rotor blades.
[0046] Therefore, the sensor device according to the invention brings with it the same advantages as described in detail with reference to the method and / or the computer program product according to the invention. The sensor device can, for example, be configured for integration into a vehicle and / or a motor. The control unit can be integrated into the vehicle's central controller, for example, in the form of an ECU and / or a motor controller. However, it is also conceivable to integrate the control unit into a distributed control device for the sensor unit. The control unit may include a processor and / or a microprocessor. The control unit can also be specifically referred to as a computing unit. Furthermore, the control unit may have a storage unit for providing a database. Attached Figure Description
[0047] The invention is further illustrated below with reference to the accompanying drawings. In the drawings:
[0048] Figure 1 illustrates a schematic representation of the method according to the present invention with method steps;
[0049] Figure 2 shows a schematic representation of the method according to the present invention with method steps;
[0050] Figure 3 shows a sensor device according to the present invention for performing the method;
[0051] Figure 4 shows the amplitude curve during the current operating cycle; and
[0052] Figure 5 shows the amplitude curves during the simulated running cycle. Detailed Implementation
[0053] In the following description of some embodiments of the present invention, the same reference numerals are used for the same technical features in different embodiments.
[0054] Figure 1 illustrates a schematic representation of the method according to the invention, showing the method steps. The method according to the invention for identifying the rotor position of a motor vehicle rotor based on sensor signals from a sensor unit can be divided into two stages. The method has an initialization stage 10 and a determination stage 20. In Figures 1 and 2, the initialization stage 10 is schematically shown with dashed lines and the determination stage 20 with dotted lines (therefore, reference numerals 10 and 20 appear twice). Elements shown with solid lines in Figures 1 and 2 can belong to both the initialization stage 10 and the determination stage 20.
[0055] In the initialization phase 10, preferably implemented when the vehicle is started, the first angular position 13 of the rotor component 12 is determined based on the sensor signal 11 in the first method step. For this purpose, corresponding processing units (“Offset correction”, “Amp correction”, “arctan”, etc.) can be provided. The sensor signal 11 can be provided by the sensor unit 32. This is implemented in the main signal path. The sensor signal 11 is preferably a cosine and sine signal. Furthermore, the sensor signal can be processed into an amplitude signal. The sensor signal 11 can be further processed in the main signal path to obtain the raw value of the first angular position 13. The raw value of the first angular position 13 is an uncorrected angle value relating to at least a portion of the rotation range R. Immediately afterwards, the sensor signal 15 is stored in the data collection area 17 based on the raw value of the first angular position 13. This is based on the raw value of the angle or the first angular position, which is provided by the main signal path after the “AngleTracker” (i.e., after obtaining the raw value 14 of the first angular position). In other words, the location in the data collection area where the sensor signal should be stored can be determined based on the original value of the first angular position. The data collection area 17 contains storage space for defining a specific number of grid points 25 (see Figure 2). This storage space can collectively store information such as the distance between the specific angle value and the ideal value for the grid point. In other words, a deviation value can be stored in the data collection area, indicating the difference between the angle value where the grid points are configured and the original value where the grid points are actually filled. This allows for the replacement of the previously stored value if, in a further process, a new value is closer to the ideal angle value, i.e., the angle value where the grid points are configured. Furthermore, the data collection area can also store whether the grid points are filled. In other words, if a measurement exists for a grid point, it is marked in the designated area of the data collection area.
[0056] Repeat the aforementioned steps until the original value of the first corner position 13 can cover at least a portion of the rotation range. In other words, repeat the above steps until measurement values can be stored for all or a predetermined number of grid points in the data collection area 17. If this is the case, then data collection can be stopped and the correction value 21 can be obtained based on the data collection area 17.
[0057] After initialization phase 10, the process can transition to determination phase 20. Error information 19, representing the expected angular error, can be obtained based on the first angular position and correction value 21. In other words, the database can be read based on the first angular position and correction value to determine or obtain error information. This database can be referred to as a lookup table. The lookup table can be calibrated and / or populated into such a database using calibration process 24. Through initialization phase 10, and particularly the determination of correction value 21, the angle value or angular position output by the angle tracker 14 can be corrected with correction value 21, so that the corrected angular position corresponds to the angle value, which forms the basis for reading the lookup table over the entire rotation range R (i.e., over 360°). This means that once correction value 21 has been obtained, i.e., initialization phase 10 has ended, switch 16 can be toggled, allowing the database to be read, thereby obtaining error information 19. Toggling switch 16 improves the accuracy of output signal 28. The switching of switch 16 can be signaled to the upper-level controller. A corresponding status signal 26 can be output for this purpose.
[0058] Next, the rotor position of rotor 30 can be determined based on error information 19—which can be retrieved from a database. In another alternative step 18, the rotor position of rotor 30 can be made (in reverse) to involve a sub-segment. This can prove advantageous to the user because the output signal 28 is expected within a predetermined angular range, which can correspond to the sub-segment. In other words, the original measurement range of the sensor unit can be calculated back from 360° in the alternative step.
[0059] The initialization phase is shown in more detail in Figure 2 than in Figure 1. The initialization phase may also include the step of determining the rotor position of the relevant sub-segment of the rotor element (30) based on the first angular position 13. In other words, if the switch has not yet been switched, then the output signal 28 is also output because the initialization phase has not yet ended 10.
[0060] Given the correction value 21, find the first phase P of 23 in the current operating cycle. B Similarly, the second phase P in the simulation's running cycle is determined. EOL The alternative location can be the second phase P, which has already been determined. EOLAnd it is stored in the storage medium so that the second phase P can be called in the initialization phase 10. EOL .
[0061] In order to obtain the correction value 22, the first step is to obtain the value at the first phase P. B With the second phase P EOL The difference between them. Then, the difference is rounded up to a multiple of the sub-segment.
[0062] Figure 3 illustrates a sensor device 100 for performing a method according to the present invention. The sensor device 100 has a sensor unit 32 for detecting a first angular position 13, at least in a sub-segment T of the rotor member 30. The sensor device 100 also has a control unit 34 configured to perform the method schematically shown in Figures 1 and 2. The sensor unit 32 may have sensor elements. Such sensor elements are specifically configured to detect only repeating sub-segments T of the rotation of the rotor member 30 within the rotational range R.
[0063] The rotor component 30 has multiple rotor blades. Here, the rotor component 30 is rotationally symmetric because it preferably has a special rotor blade 33 that differs from the other rotor blades 31. It is conceivable that the special rotor blade 33 is a missing rotor blade. This results in the amplitude curve trend, as shown in Figures 4 and 5.
[0064] Figures 4 and 5 should be used to exemplify further illustrative of the method steps for obtaining the correction value 21 in the initialization phase 10. This method step is introduced if data collection is stopped, i.e., if the data collection area 17 has been filled to a predetermined extent (e.g., 70%). To obtain or determine the correction value 21, a "phase detection" is performed once. For this purpose, the sliding average 52 of the original value at the first angular position 13 within a predetermined range of rotation R in the current operating cycle is moved over the entire rotation range (including overlap). The result is the curve trajectory 50 in the current operating cycle. The solid line 50 in Figure 5 shows a typical amplitude curve in the current operating cycle, from which the curve trajectory 52 can be obtained by the method steps. The curve trajectory (sliding average 52) has a characteristic minimum 51, which is characteristic of the amplitude curve and therefore of the position of a particular feature of the target. This value is the first phase P in the current operating cycle. B .
[0065] Second phase P EOLIt is also obtained on the EOL (End of Production Line Tester). For this purpose, a data collection process can be performed on the EOL in the data collection area, as described above. This allows the determination of one or more curve trends for the simulated operating cycle 42. The second phase can be stored, thus making it available for calculating the difference.
[0066] It should be further noted that the terms "comprising" and "having" do not exclude other elements, and the indefinite articles "a" or "an" do not exclude multiple elements. Furthermore, it should be noted that the features and steps described in one of the above embodiments can also be applied in combination with other features and steps of other above embodiments. Reference numerals in the claims should not be considered limiting.
[0067] List of reference numerals
[0068] 100 sensor devices
[0069] 10 Initialization Phase
[0070] 11 sensor signals
[0071] 12. Determine the position of the first corner.
[0072] 13 First corner position
[0073] 14. Obtain the original value
[0074] 15. Store sensor signals
[0075] 16 switches
[0076] 17 Data Collection Area
[0077] 18. Determine the rotor position of the rotor components.
[0078] 19 Error Information
[0079] 20 Determining the Stage
[0080] 21 correction values
[0081] 22. Calculate the correction value
[0082] 24 Calibration Process
[0083] 26 status signals
[0084] 30 rotor components
[0085] 31 rotor blades
[0086] 32 sensor units
[0087] 33 Special Rotor Blades
[0088] 34 control units
[0089] 42. Curve trend during the simulated running cycle
[0090] The trend of the curve of 50 in the current operating cycle
[0091] 51. Characteristic Minimum
[0092] 52 moving average
[0093] P B First phase
[0094] P EOL Second phase
[0095] T-section
[0096] R rotation range
Claims
1. A method for identifying the rotor position of a motor vehicle rotor component (30) based on sensor signals from a sensor unit (32), the method comprising an initialization phase (10) and a subsequent determination phase (20), wherein, The initialization phase (10) has the following steps: a) determining the first angular position (13) of the rotor based on the sensor signal (11), b) obtaining the original value (14) of the first angular position (13), c) storing (15) the sensor signal (11) in the data collection area (17) based on the original value of the first angular position (13), d) repeating steps a)-c) until the original value of the first angular position (13) has covered at least a portion of the rotation range (R), and e) obtaining (22) a correction value (21) based on the data collection area (17). The determination phase (20) has the following steps: I) determining the first angular position (13) of the rotor based on the sensor signal (11), II) obtaining error information (19) of the expected angle error based on the original value of the first angular position and the correction value (21), and III) determining the rotor position of the rotor (30) based on the error information (19).
2. The method according to claim 1, wherein, The initialization phase (10) is performed once, especially when the motor vehicle is started.
3. The method according to any one of the preceding claims, wherein, In obtaining the original value of the first angular position (13), the first angular position (13) relates to the rotation range (R).
4. The method according to any one of the preceding claims, wherein, Given the correction value (22) (21), find the first phase (P) in the current operating cycle (23). B And retrieve or call the second phase (P) in the simulation's running cycle. EOL ).
5. The method according to claim 4, wherein, Based on the first phase (P) B ) and the second phase (P EOL The correction value (21) is obtained by calculating the difference between the two.
6. The method according to claim 5, wherein, In the first phase (P) B ) and the second phase (P EOL The difference between the two sub-segments (T) is rounded up to a multiple of the sub-segment (T), thereby deriving the correction value (21).
7. The method according to any one of the preceding claims, wherein, The data collection area (17) is divided into a predetermined number of grid points (25), wherein each grid point (25) is assigned an original value corresponding to at least a portion of the rotation range (R).
8. The method according to any one of the preceding claims, wherein, In step d), monitor whether the data collection area (17), and in particular each grid point (25) of the data collection area, is filled with the storage (15) of sensor signals.
9. The method according to any one of the preceding claims, wherein, If the initialization phase is over, then output the status signal (26).
10. The method according to any one of the preceding claims, wherein, The initialization phase (10) also includes the following steps: f) determining (18) the rotor position of the rotor component involving the sub-section based on the first angular position (13).
11. The method according to any one of the preceding claims, wherein, A calibration process (24) is performed, during which the expected angular error with respect to the rotation range is determined and the error information (19) is registered in the database.
12. The method according to any one of the preceding claims, wherein, The sensor unit (32) is configured as an inductive sensor, and the sensor unit (32) includes a conductor element that is non-rotatably connected to the rotor (30) and a sensor element for inductively detecting the conductor element for detecting the first angular position (13).
13. The method according to any one of the preceding claims, wherein, The rotor (30) is the axle of the vehicle.
14. A computer program product comprising instructions that, when executed by a control unit (34), cause the control unit (34) to perform the method according to any one of the preceding claims.
15. A sensor device (100) for identifying the rotor position of a rotor component (30) in a rotational range, the sensor device having a sensor unit (32) for detecting a first angular position (13) in at least a sub-segment (T) of the rotor component (30), and a control unit (34) for performing the method according to any one of claims 1-13.
16. The sensor device (100) according to claim 15, wherein, The rotor (30) has rotor blades (31) and is rotationally symmetrical, wherein the rotor (30) has, in particular, special rotor blades (33) that are different from the other rotor blades (31).