Apparatus and method for suppressing interference fields in magnetic sensors

Abstract

The invention relates to an apparatus and a method for suppressing interference fields in a magnetic sensor. A method (100) for detecting an angular position (theta) of an excitation magnet (15), wherein the method (100) comprises: generating (S100) a magnetic field (B) by the excitation magnet (15); detecting (S110) the magnetic flux density (B1,..., Bn) of the generated magnetic field (B) by means of a number n > = 2 magnetic field sensors (S1,..., Sn) arranged on the main circuit surface (25) of the integrated circuit (20); outputting (S120), to an integrated circuit (20), detection signals (VS1,..., VSn) proportional to the magnetic flux densities (B1,..., Bn) detected by the n magnetic field sensors (S1,..., Sn); performing a first phase correction on the output detection signals (VS1,..., VSn) (S130); converting (S140) the phase-corrected detection signals (VS1 ',..., VSn'); second phase correction is performed on the converted detection signals (Vt1, Vt2) (S150).

Description

Technical Field

[0001] The invention relates to a device and a method for suppressing interference fields in a magnetic sensor. Background Art

[0002] Devices and methods for determining the angular position of an excitation magnet are known in the prior art. For this purpose, at least one magnetic field sensor is arranged in the magnetic field of the excitation magnet and a detection signal output by the magnetic field sensor is detected.

[0003] These magnetic field sensors are often used in areas where there are a large number of possible interference variables. For example, they are used in the automotive industry. However, especially with the increasing number of electrical and electronic components in a car, the extent to which interference fields occur also increases, which prevents reliable measurement of the magnetic field and detection of the angular position of the excitation magnet relative to the magnetic field sensor.

[0004] In the prior art, it is proposed to use a signal processing processor to compensate the measured values ​​received from the magnetic field sensor and to compensate for the magnetic interference field. However, this compensation can only be implemented in a single way to obtain a uniform magnetic field. In contrast, the compensation of a magnetic field affected by multiple interference fields is more extensive, because the compensation must also take into account the field gradient of the generated magnetic field. Summary of the invention

[0005] Against this background, the invention is based on the technical problem of providing a method and a device for reliably detecting the angular position of an excitation magnet.

[0006] The method for processing the signal of the magnetic field sensor according to the first aspect of the present invention comprises: generating a magnetic field by exciting a magnet; detecting the magnetic flux density of the generated magnetic field by arranging n≥2 magnetic field sensors on the main circuit surface of the integrated circuit; outputting a detection signal proportional to the magnetic flux density detected by the n magnetic field sensors to the integrated circuit; performing gain correction on the output detection signal; transforming the gain-corrected detection signal; and performing gain correction on the transformed detection signal. The gain correction of the output detection signal is performed according to the following formula:

[0007] VS′ i =VS i *k g_i , for i=1,...,n

[0008] Among them, k g_i =A z / max(VS i ), for i=1,...,n

[0009] The transformation of the detection signal after gain correction is performed according to the following formula:

[0010] For i=1,…,n

[0011] as well as

[0012] For i = 1, ..., n, where And preferably The gain correction of the transformed detection signal is performed according to the following formula:

[0013] Vt′1=Vt1*k g_out_1

[0014] as well as

[0015] Vt′2=Vt2*k g-iut_2 .

[0016] In the following, it is assumed that all sensor signals have the same amplitude within at least one complete period. g_i , all sensors are excited with the same uniform magnetic field. Calculate k g_i , so that after gain correction, the sensor signal has the same amplitude when excited with a uniform magnetic field. Calculate k g_i One possible approach is to choose a target amplitude A that has the best value for subsequent calculations z .

[0017] Furthermore, it is assumed that the transformed detection signals Vt1 and Vt2 have the same amplitude. For example, in the case of a rotating magnet for at least one complete cycle, the two signals are evaluated to determine their amplitudes Avt1 and Avt2. Further possibilities for determining the amplitudes are known from the prior art. The target amplitude Azt that is optimal for the following calculation is selected. The coefficients are then calculated according to the following formula:

[0018] Kg_out_1=A zt / Avt1

[0019] Kg_out_2=A zt / Avt2.

[0020] The method according to the first aspect enables the angular position of the excitation magnet to be determined reliably even in the presence of interfering fields.

[0021] Another method for processing the signal of a magnetic field sensor according to the second aspect of the present invention includes: generating a magnetic field by exciting a magnet; detecting the magnetic flux density of the generated magnetic field by means of n ≥ 2 magnetic field sensors arranged on the main circuit surface of an integrated circuit; outputting a detection signal proportional to the magnetic flux density detected by the n magnetic field sensors to the integrated circuit; performing gain correction on the detection signal, performing offset correction on the detection signal after the gain correction, transforming the detection signal after the offset correction, performing gain correction on the detection signal, and performing offset correction on the detection signal after the gain correction.

[0022] The gain correction of the detection signal is performed according to the following formula:

[0023] VS′ i =VS i *k g_i , for i=1,...,n

[0024] where k g_i =A z / max(VS i ), for i=1,...,n

[0025] The offset correction of the detection signal after gain correction is performed according to the following formula:

[0026] VS″ i =VS′ i +k off_i , for i=1,...,n

[0027] The detection signal after offset correction is transformed according to the following formula:

[0028] For i=1,…,n

[0029] as well as

[0030] For i = 1, ..., n, where And preferably

[0031] The gain correction of the detection signal is performed according to the following formula:

[0032] Vt′1=Vt1*k g_out_1 ,

[0033] as well as

[0034] Vt′2=Vt2*k g_out_2 .

[0035] The offset correction of the detection signal after gain correction is performed according to the following formula:

[0036] Vt″1=Vt′1+k off_out_1 ,

[0037] as well as

[0038] Vt″2=Vt′2+k off_out_2 .

[0039] This method reliably determines the angular position of the excitation magnet even in the presence of interfering fields.

[0040] Another method for processing a signal of a magnetic field sensor according to a third aspect of the present invention comprises: generating a magnetic field by exciting a magnet; detecting the magnetic flux density of the generated magnetic field by means of n ≥ 2 magnetic field sensors arranged on a main circuit surface of an integrated circuit; outputting a detection signal proportional to the magnetic flux density detected by the n magnetic field sensors to the integrated circuit; and transforming the detection signal according to the following formula:

[0041] For i = 1, ..., n, where For i=1,…,n,

[0042] as well as

[0043] For i = 1, ..., n, where Among them, preferably And among them For i=1,…,n.

[0044] where α i is the angular position of the corresponding sensor. For example, when the sensors are arranged at equal angles, α i It will be (n-1)*(360° / n).

[0045] It should be noted here that and is the phase shift of Vt1 and Vt2 relative to the preferred coordinate system when implementing the method shown here. These values ​​are arbitrary and therefore have no orthogonality. The best results can be obtained in this case.

[0046] This method enables the angular position of the excitation magnet to be determined reliably even in the presence of interfering fields.

[0047] According to a fourth aspect of the present invention, another method for processing a magnetic field sensor signal includes: generating a magnetic field by exciting a magnet; detecting the magnetic flux density of the generated magnetic field by a number n≥2 magnetic field sensors arranged on the main circuit surface of an integrated circuit; outputting a detection signal proportional to the magnetic flux density detected by the n magnetic field sensors to the integrated circuit; performing a first phase correction on the output detection signal; performing a gain correction on the detection signal after the phase correction; performing an offset correction on the detection signal after the gain correction; transforming the detection signal after the offset correction; performing a second phase correction on the transformed detection signal; performing a gain correction on the detection signal after the phase correction; and performing an offset correction on the detection signal after the gain correction. The first phase correction on the output detection signal is performed according to the following formula:

[0048] VS′ i =VS i +k ph_i *VS j , for i=1,…,n, for j=1,…,n, and where j≠i.

[0049] The gain correction of the detection signal after phase correction is performed according to the following formula:

[0050] VS″ i =VS′ i *k g_i , for i=1,…,n

[0051] The offset correction of the detection signal after gain correction is performed according to the following formula:

[0052] VS″′ i =VS″ i +k off_i , for i=1,…,n

[0053] The detection signal after offset correction is transformed according to the following formula:

[0054] For i=1,…,n

[0055] as well as

[0056] For i = 1, ..., n, where

[0057] And preferably

[0058] The second phase correction is performed on the transformed detection signal according to the following formula:

[0059] Vt′1=Vt1+k ph_out_1 *Vt2,

[0060] as well as

[0061] Vt′2=Vt2+k ph_out_2 *Vt1.

[0062] The gain correction of the detection signal after phase correction is performed according to the following formula: Vt″1=Vt′1*k g_out_1 ,

[0063] as well as

[0064] Vt″2=Vt′2*k g_out_2 .

[0065] The offset correction of the detection signal after gain correction is performed according to the following formula:

[0066] Vt″′1=Vt″1+k off_out_1 ,

[0067] as well as

[0068] Vt″′2=Vt″2+k off_out_2 .

[0069] This method reliably determines the angular position of the excitation magnet even in the presence of interfering fields.

[0070] For i = 1, ..., n, where For i=1,…,n,

[0071] For i = 1, ..., n, where Among them, preferably And among them For i=1,…,n.

[0072] The above method according to any one of the first to fourth aspects can be advantageously used for stray field suppression. Therefore, the stray field that may act on the magnetic field sensors S1, ..., S n . to obtain improved results.

[0073] The devices according to the fifth, sixth, seventh and eighth aspects of the present invention are respectively used to detect the angular position of the excitation magnet using one of the above-mentioned methods according to any one of the first to fourth aspects, and include an integrated circuit and a number of n≧2 magnetic field sensors. The integrated circuit has a circuit main surface, which is arranged orthogonally relative to the rotation axis of the excitation magnet. The number of n≧2 magnetic field sensors is arranged on the circuit main surface and is configured to output a detection signal proportional to the magnetic flux density of the excitation magnet detected by the magnetic field sensor. More precisely, each magnetic field sensor outputs a respective detection signal, which is proportional to the magnetic flux density of the excitation magnet detected by the magnetic field sensor.

[0074] Using any of the above devices, the angular position of the excitation magnet can be reliably detected.

[0075] In the device according to the ninth aspect of the invention, according to any of the fifth, sixth or eighth aspects, n magnetic field sensors are arranged on the main surface of the circuit at a distance of radius from the axis of rotation. Therefore, in order to allow a more variable and / or more reliable arrangement, the sensors can, for example, all be arranged on a single identical radius, or they can be distributed on multiple radii from the axis of rotation, i.e. on different concentric circles with radii relative to the axis of rotation. In other words, according to a preferred aspect, Ri is the same for all sensors or part of the sensors, respectively.

[0076] With this device, the angular position of the excitation magnet can be reliably detected.

[0077] In the device according to the ninth aspect of the present invention, according to any one of the fifth, sixth, eighth and ninth aspects, n magnetic field sensors are arranged on the main surface of the circuit at equal angles around the rotation axis. Therefore, the packaging of the magnetic field sensor can be made simpler and more economical.

[0078] With this device, the angular position of the excitation magnet can be reliably detected.

[0079] The above-mentioned device according to any one of the fifth to ninth aspects can be advantageously used for stray field suppression. Therefore, it is possible to reduce the stray field that may act on the magnetic field sensors S1, ..., S n impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figure 1 is a plan view of a device for detecting the angular position of an excitation magnet.

[0081] Figure 2 is a side view of a device for detecting the angular position of an excitation magnet.

[0082] Figure 3A process flow diagram describing a method for processing a detection signal of a magnetic field sensor is shown.

[0083] Figure 4 A process flow diagram describing another method for processing a detection signal of a magnetic field sensor is shown.

[0084] Figure 5 A process flow diagram describing another method for processing a detection signal of a magnetic field sensor is shown.

[0085] Figure 6 A process flow diagram describing another method for processing a detection signal of a magnetic field sensor is shown. DETAILED DESCRIPTION

[0086] The present invention will now be described based on the accompanying drawings. It is assumed that the embodiments and aspects of the present invention described herein are merely examples and are by no means intended to limit the scope of protection of the claims. The present invention is defined by the claims and their equivalents. It is assumed that the features of one aspect or one embodiment of the present invention can be combined with the features of another aspect or other aspects and / or embodiments of the present invention.

[0087] Figure 1 A device 10 for detecting the angular position θ of an excitation magnet 15 is shown. The device 10 comprises an integrated circuit 20 and a number n≧2 of magnetic field sensors S1, ..., S n The integrated circuit 20 has a circuit main surface 25 which is arranged orthogonally with respect to the rotation axis A1 of the excitation magnet 15 .

[0088] The number of magnetic field sensors S1,...,S is n n Arranged at any position on the circuit main surface 25, and configured to output the n magnetic field sensors S1, ..., S n The detected magnetic flux density B1, ..., B n Proportional detection signals VS1,...,VS n .

[0089] n magnetic field sensors S1,...,S n Preferably, the n magnetic field sensors S1, ..., S are arranged on the circuit main surface 25 at a distance of radius r from the rotation axis A1. n Different radii r1, ..., r1, ..., r2, ..., r3, ..., r4, ..., r5, ..., r6, ..., r7, ..., r8, ..., r9, ..., r10, ..., r11, ..., r12, ..., r13, ..., r14, ..., r15, ..., r16, ..., r17, ..., r18, ..., r19, ..., r20, ..., r21, ..., r n , i.e., located with radius r1, ..., r relative to the rotation axis A1 n On different concentric circles (to simplify the diagram, Figure 1 Only the radius r1 is shown).

[0090] In addition, n magnetic field sensors S1,...,S n Preferably, the n magnetic field sensors S1, ..., S are arranged equiangularly around the rotation axis A1 on the circuit main surface 25. However, n It can also be arranged at different angular positions α1, ..., α n (To simplify the diagram, Figure 1 2 and 3 (a2 and a3) of the second magnetic field sensor S2 and the third magnetic field sensor S3 are shown merely by way of example.

[0091] Figure 2 1 shows a side view of a device 10 for detecting the angular position θ of an excitation magnet 15. In order to detect the angular position θ of the excitation magnet 15, a number n of magnetic field sensors S1, ..., S n .exist Figure 1 and Figure 2 In the configuration shown, a number n=6 magnetic field sensors S1, . . . , S n (For simplicity, Figure 1 denoted by S1 to S6).

[0092] Figure 3 is a process flow diagram of a method 100 for processing a detection signal of a magnetic field sensor that allows detecting an angular position θ of an excitation magnet 15 . In step S100 , the method 100 comprises generating a magnetic field B by the excitation magnet 15 .

[0093] The method 100 further comprises, in step S110, by arranging n≧2 magnetic field sensors S1, . . . , S n To detect the magnetic flux density B1,...,B of the generated magnetic field B n .

[0094] The method 100 further includes, in step S120, outputting to the integrated circuit 20 the magnetic field information corresponding to the n magnetic field sensors S1, ..., S n Detected magnetic flux density B1,...,B n Proportional detection signals VS1,...,VS n .

[0095] The method 100 further includes, in step S130, calculating the output detection signals VS1, ..., VS according to the following formula: n Perform gain correction, where k g_i Indicates the correction factor used for gain correction

[0096] (1) VS′ i =VSi *k g_i , for i=1,…,n.

[0097] The method 100 further includes, in step S140, performing gain correction on the detection signals VS′1, ..., VS′ according to the following formula: n To transform:

[0098] For i=1,…,n

[0099] For i = 1, ..., n, where And preferably

[0100] The method 100 further includes, in step S150, performing gain correction on the transformed detection signals Vt1 and Vt2 according to the following formula, where k g_out_1 and k g_out_2 Indicates the correction factor used for gain correction

[0101] Vt′1=Vt1*k g_out_1

[0102] Vt′2=Vt2*k g_out_2 .

[0103] Figure 4 is a process flow diagram of a method 200 for processing a detection signal of a magnetic field sensor that allows detecting an angular position θ of an excitation magnet 15 . In step S200 , the method 200 comprises generating a magnetic field B by the excitation magnet 15 .

[0104] The method 200 further comprises, in step S210, by arranging n≧2 magnetic field sensors S1, . . . , S n Detect the magnetic flux density B1,...,B of the generated magnetic field B n .

[0105] The method 200 further includes, in step S220, outputting to the integrated circuit 20 the magnetic field information corresponding to the n magnetic field sensors S1, ..., S n Detected magnetic flux density B1,...,B n Proportional detection signals VS1,...,VS n VS′ i =VS i +k ph_i *VS j , for i=1,…,n, for j=1,…,n, and where j≠i.

[0106] The method 200 further includes, in step S240, calculating the detection signal VS according to the following formula: i ,...,VS n Perform gain correction, where k g_i Indicates the correction factor used for gain correction.

[0107] (2) VS′ i =VS i *k g_i , for i=1,...,n.

[0108] The method 200 further includes, in step S250, calculating the gain-corrected detection signal VS′ according to the following formula: i ,...,VS′ n To perform deskew:

[0109] (3) VS″ i =VS′ i +k off_i , for i=1,...,n.

[0110] The method 200 further includes, in step S260, calculating the offset-corrected detection signal VS″ according to the following formula: i ,...,VS″ n To transform:

[0111] For i=1,…,n

[0112] For i = 1, ..., n, where And preferably

[0113] Vt′1=Vt1+k ph_out_1 *Vt2

[0114] Vt′2=Vt2+k ph_out_2 *Vt1.

[0115] The method 200 further includes, in step S280, performing gain correction on the detection signals Vt1, Vt2 according to the following formula S280, where k g_out_1 and k g_out_2 Indicates the correction factor used for gain correction.

[0116] Vt′1=Vt1*k g_out_1

[0117] Vt′2=Vt2*k g_out_2 .

[0118] The method 200 further includes, in step S290, performing offset correction on the gain-corrected detection signals Vt′1 and Vt′2 according to the following formula, where k off_out_1 and k off_out_2 Indicates the correction factor used for offset correction.

[0119] Vt″1=Vt′1+k off_out_1

[0120] Vt″2=Vt″2+k off_out_2 .

[0121] Those skilled in the art will appreciate that steps S230, S240, S250 can be interchanged without departing from the subject matter of the present invention. In addition, those skilled in the art will appreciate that steps S270, S280, S290 can be interchanged without departing from the subject matter of the present invention.

[0122] Figure 5 is a flow chart of a method 300 for processing a detection signal of a magnetic field sensor, which allows the magnetic field sensors S1, ..., S1 to be arbitrarily arranged on the main surface 25 of the circuit. n Detects the angular position θ of the excitation magnet 15. In this case, the magnetic field sensors S1, ..., S n The magnetic field sensors S1, . . . , S n They are preferably distributed equiangularly around the axis of rotation A1 .

[0123] In step S300 , the method 300 includes: generating a magnetic field B by exciting the magnet 15 .

[0124] The method 300 further comprises, in step S310, by arranging n≧2 magnetic field sensors S1, . . . , S n Detect the magnetic flux density B1,...,B of the generated magnetic field B n .

[0125] The method 300 further includes, in step S320, outputting to the integrated circuit 20 the magnetic field information corresponding to the n magnetic field sensors S1, ..., S n The detected magnetic flux density B1,...,Bn is proportional to the detection signal VS1,...,VS n .

[0126] The method 300 further includes, in step S330, analyzing the detection signals VS1, ..., VS according to the following formula: n Perform transformation S330:

[0127] For i = 1, ..., n, where For i=1,…,n

[0128] For i = 1, ..., n, where Among them, preferably And among them For i=1,…,n.

[0129] Figure 6 is a process flow diagram of a method 400 for processing a detection signal of a magnetic field sensor that allows detecting an angular position θ of an excitation magnet 15 . In step S400 , the method 400 comprises generating a magnetic field B by the excitation magnet 15 .

[0130] The method 400 further comprises, in step S410, by arranging n≧2 magnetic field sensors S1, . . . , S n Detect the magnetic flux density B1,...,B of the generated magnetic field B n .

[0131] The method 400 further includes, in step S420, outputting to the integrated circuit 20 the magnetic field signals corresponding to the n magnetic field sensors S1, ..., S n Detected magnetic flux density B1,...,B n Proportional detection signals VS1,...,VS n .

[0132] The method 400 further includes, in step S430, calculating the output detection signals VS1, ..., VS according to the following formula: n Perform a first phase correction where k ph_i Represents the correction factor used for phase correction. VS′ i =VS i +k ph_i *VS j , for i=1,…,n, for j=1,…,n, where j≠i.

[0133] The method 400 further includes, in step S440, calculating the phase-corrected detection signal VS′ according to the following formula: i ,...,VS′ n Perform gain correction, where k g_i Represents the correction factor used for gain correction. (4)VS″ i =VS′ i *k g_i , for i=1,...,n

[0134] The method 200 further includes, in step S450, calculating the gain-corrected detection signal VS″ according to the following formula: i ,...,VS″ n To perform deskew:

[0135] (5) VS″′ i =VS″ i +k off_i , for i=1,...,n

[0136] The method 400 further includes, in step S460, calculating the offset-corrected detection signal VS″′ according to the following formula: i ,...,VS″′ n To transform:

[0137] For i=1,…,n

[0138] For i = 1, ..., n, where And preferably

[0139] The method 400 further includes, in step S470, performing a second phase correction on the transformed detection signals Vt1 and Vt2 according to the following formula, where k ph_out_1 and k ph_out_2 Indicates the correction factor used for phase correction.

[0140] Vt′1=Vt1+k ph_out_1 *Vt2

[0141] Vt′2=Vt2+k ph_out_2 *Vt1.

[0142] The method 400 further includes, in step S480, performing gain correction on the phase-corrected detection signals vt′1 and vt′2 according to the following formula S480, where k g_out_1 and k g_out_2 Indicates the correction factor used for gain correction.

[0143] Vt″1=Vt′1*k g_out_1

[0144] Vt″2=Vt′2*k g_out_2 .

[0145] The method 400 further includes, in step S490, performing offset correction on the gain-corrected detection signals vt″1, vt″2′ according to the following formula, where k off_out_1 and k off_out_2 Indicates the correction factor used for offset correction.

[0146] Vt″′1=Vt″1+k off_out_1

[0147] Vt″′2=Vt″2+k off_out_2 .

[0148] Those skilled in the art will appreciate that steps S430, S440, S450 may be interchanged without departing from the subject matter of the present invention. Furthermore, those skilled in the art will appreciate that steps S470, S480, S490 may be interchanged without departing from the subject matter of the present invention. The above formulas (6), (7) and (8) are adjusted in this case with reference to the upstream steps; the same applies to formulas (11) to (16).

[0149] Reference numerals list

[0150] 10. Installation

[0151] 15 Excitation magnet

[0152] 20 Integrated Circuits

[0153] 25 Circuit main surface

[0154] A1 Rotation axis

[0155] r1,...,r n radius

[0156] S1,...,S n Magnetic Field Sensor

[0157] α1,...,α n Angular position of the magnetic field sensor

[0158] θ Angular position of the exciting magnet

[0159] VS1,...,VS n Heartbeat

[0160] B Magnetic Field

[0161] B1,...,B n Detected magnetic flux density

Claims

1. A method for processing a detection signal of a magnetic field sensor, the method comprising: Generate a magnetic field by exciting the magnet (B); By arranging n≥2 magnetic field sensors S1, . . . , S on the main circuit surface of the integrated circuit (20) n Detect the magnetic flux density B1,...,B of the generated magnetic field n ; Output (S120) to the integrated circuit and the n magnetic field sensors S1, ..., S n The magnetic flux density (B1, ..., B n ) proportional to the detection signal VS1,...,VS n ; The output detection signals VS1,...,VS n To perform a gain correction: VS′ i =VS i *k g_i , for i=1,…,n The gain-corrected detection signals VS′1,...,VS′ are calculated according to the following formula: n To transform: For i=1,…,n as well as For i = 1, ..., n, where And preferably The transformed detection signal (Vt1, Vt2) is subjected to gain correction (S150) according to the following formula: Vt′1=Vt1*k g_out_1 as well as Vt′2=Vt2*k g_out_2 。 2. Use of the method according to claim 1 for stray field suppression.

3. A device for detecting the angular position of an excitation magnet using the method according to claim 1, the device comprising: an integrated circuit having a circuit main surface, wherein the circuit main surface is arranged orthogonally to the rotation axis of the excitation magnet; as well as Number n ≥ 2 magnetic field sensors S1,...,S n , wherein the n magnetic field sensors S1, ..., S n arranged on the main surface of the circuit, and wherein the n magnetic field sensors S1, ..., S n is configured to output the n magnetic field sensors S1, ..., S n The detected magnetic flux density B1,...,B n Proportional detection signals VS1,...,VS n .

4. The device according to claim 3, wherein The n magnetic field sensors are arranged on the main surface of the circuit and spaced apart from the rotation axis by a radius.

5. The device according to claim 4, wherein The n magnetic field sensors S1, ..., S n The circuits are arranged equiangularly around the rotation axis on the main surface of the circuit.

6. Use of the device according to claim 3 for stray field suppression.

7. A method for processing a detection signal of a magnetic field sensor, the method comprising: Generate a magnetic field by exciting a magnet; By arranging n≥2 magnetic field sensors S1, ..., S1 on the circuit main surface of the integrated circuit n Detect the magnetic flux density B1,...,B of the generated magnetic field n ; The integrated circuit outputs the n magnetic field sensors S1, ..., S n The detected magnetic flux density is proportional to the detection signal VS1, ..., VS n ; The detection signals VS1, ..., VS n To perform a gain correction: VS′ i =VS i *k g_i , for i=1,…,n The gain-corrected detection signals VS′1,...,VS′ are calculated according to the following formula: n To perform deskew: VS″ i =VS′ i +k off_i , for i=1,…,n The offset-corrected detection signal VS″1,...,VS″ is calculated according to the following formula n To transform: For i=1,…,n For i = 1, ..., n, where And preferably The detection signal (vt1, vt2) is gain corrected according to the following formula: Vt′1=Vt1*k g-out_1 Vt′2=Vt2*k g_out_2 The gain-corrected detection signal (vt′1, vt′2) is offset corrected according to the following formula: Vt″1=Vt′1+k off_out_1 Vt″2=Vt′2+k off_out _2.

8. Use of the method according to claim 7 for stray field suppression.

9. A device for processing a detection signal of a magnetic field sensor using the method according to claim 7, the device comprising: an integrated circuit having a circuit major surface, wherein the circuit major surface is arranged orthogonally to the rotation axis of the excitation magnet; as well as Number n ≥ 2 magnetic field sensors S1,...,S n , wherein the n magnetic field sensors S1,...,S n arranged on the main surface of the circuit, and wherein the n magnetic field sensors S1, ..., S n is configured to output the n magnetic field sensors S1, ..., S n The detected magnetic flux density B1,...,B n Proportional detection signals VS1,...,VS n .

10. The device according to claim 9, wherein: The n magnetic field sensors are arranged on the main surface of the circuit and spaced apart from the rotation axis by a radius.

11. The device according to claim 10, wherein The n magnetic field sensors S1, ..., S n The circuits are arranged equiangularly around the rotation axis on the main surface of the circuit.

12. Use of the device according to claim 9 for stray field suppression.

13. A method for processing a detection signal of a magnetic field sensor, the method comprising: Generate a magnetic field by exciting a magnet; By arranging n≥2 magnetic field sensors S1, ..., S1 on the circuit main surface of the integrated circuit n Detect the magnetic flux density B1,...,B of the generated magnetic field n ; The integrated circuit outputs the n magnetic field sensors S1, ..., S n Detected magnetic flux density B1,...,B n Proportional detection signals VS1,...,VS n ;as well as The detection signals VS1, ..., VS n Perform transformation (S330): For i = 1, ..., n, where For i=1,…,n For i = 1, ..., n, where Among them, preferably And among them For i=1,…,n.

14. Use of the method according to claim 13 for stray field suppression.

15. A device for processing a detection signal of a magnetic field sensor using the method according to claim 13, the device comprising: an integrated circuit having a circuit major surface, wherein the circuit major surface is arranged orthogonally to the rotation axis of the excitation magnet; as well as Number n ≥ 2 magnetic field sensors S1,...,S n , wherein the n magnetic field sensors S1, ..., S n arranged on the main surface of the circuit, and wherein the n magnetic field sensors S1, ..., S n is configured to output the n magnetic field sensors S1, ..., S n The detected magnetic flux density B1,...,B n Proportional detection signals VS1,...,VS n .

16. Use of a device according to claim 15 for stray field suppression.

17. A method for processing a detection signal of a magnetic field sensor, the method comprising: Generate a magnetic field by exciting a magnet; By arranging n≥2 magnetic field sensors S1, ..., S1 on the circuit main surface of the integrated circuit n Detect the magnetic flux density B1,...,B of the generated magnetic field n ; The integrated circuit outputs the n magnetic field sensors S1, ..., S n Detected magnetic flux density B1,...,B n Proportional detection signals VS1,...,VS n ; The output detection signals VS1,...,VS n Perform the first phase correction: VS′ i =VS i +k ph_i *VS j , for i = 1, ..., n, for j = 1, ..., n, and where j ≠ i The phase-corrected detection signals VS′1,...,VS′ are calculated according to the following formula: n To perform a gain correction: VS″ i =VS′ i *k g_i , for i=1,…,n The gain-corrected detection signal VS″1,...,VS″ is calculated according to the following formula n To perform deskew: VS″′ i =VS″ i +k off_i , for i=1,…,n The offset-corrected detection signal VS″′1,...,VS″′ is calculated according to the following formula n To transform: For i=1,…,n For i = 1, ..., n, where And preferably A second phase correction is performed on the transformed detection signal (Vt1, Vt2) according to the following formula: Tue ′ 1=Vt1+k ph_out_1 *Vt2 Tue ′ 2=Vt2+k ph_out_2 *Vt1 The phase-corrected detection signal (vt ′ 1,vt ′ 2) Perform gain calibration: Vt″1=Vt′1*k g_out_1 Vt″2=Vt′2*k g_out_2 The gain-corrected detection signal (vt″1, vt″2) is offset corrected according to the following formula: Vt″′1=Vt″1+k off_out_1 Vt″′2=Vt″2+k off_out_2 。 18. Use of the method according to claim 17 for stray field suppression.

19. A device for processing a detection signal of a magnetic field sensor using the method according to claim 17, the device comprising: an integrated circuit having a circuit main surface, wherein the circuit main surface is arranged orthogonally to the rotation axis of the excitation magnet; as well as Number n ≥ 2 magnetic field sensors S1,...,S n , wherein the n magnetic field sensors S1, ..., S n arranged on the main surface of the circuit, and wherein the n magnetic field sensors S1, ..., S n is configured to output the magnetic field generated by the n magnetic field sensors S1, ..., S n The detected magnetic flux density B1,...,B n Proportional detection signals VS1,...,VS n .

20. The device according to claim 19, wherein The n magnetic field sensors are arranged on the main surface of the circuit and spaced apart from the rotation axis by a radius.

21. The device according to claim 20, wherein The n magnetic field sensors S1, ..., S n The circuits are arranged at equal angles around the rotation axis on the main surface of the circuit.

22. Use of the device according to claim 19 for stray field suppression.

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