阅读说明：本技术 用于车辆的传感器装置、用于制造用于车辆的传感器装置的方法、用于运行用于车辆的传感器装置的方法和用于车辆的传感器系统 (Sensor device for a vehicle, method for producing a sensor device for a vehicle, method for operating a sensor device for a vehicle, and sensor system for a vehicle ) 是由 S·普兰斯 于 2020-03-26 设计创作，主要内容包括：本发明提出一种用于车辆(100)的传感器装置(120)。该传感器装置(120)具有至少两个用于检测发送器磁体(126)的发送器磁场(127)的磁场传感器(122、124)。所述磁场传感器(122、124)构造为使得由发送器磁场(127)和干扰源的外部干扰磁场(301)合成的磁场在不同的磁场传感器(122、124)中发挥不同强度的作用。(The invention proposes a sensor device (120) for a vehicle (100). The sensor device (120) has at least two magnetic field sensors (122, 124) for detecting a transmitter magnetic field (127) of a transmitter magnet (126). The magnetic field sensors (122, 124) are designed in such a way that the magnetic field resulting from the transmitter magnetic field (127) and the external interference magnetic field (301) of the interference source acts with different intensities in the different magnetic field sensors (122, 124).)

1. A sensor device (120) for a vehicle (100), wherein the sensor device (120) has at least two magnetic field sensors (122, 124; 224; 422, 424) for detecting a transmitter magnetic field (127) of a transmitter magnet (126), characterized in that the magnetic field sensors (122, 124; 224; 422, 424) are configured in such a way that a magnetic field resulting from the transmitter magnetic field (127) and an external interference magnetic field (301) of an interference source acts with different intensities in different magnetic field sensors (122, 124; 224; 422, 424).

2. The sensor device (120) according to claim 1, characterized in that at least one of the magnetic field sensors (122, 124; 224; 422, 424) has a means (240) for shielding at least one component of the transmitter magnetic field (127) and/or the disturbing magnetic field (301) and/or at least one of the magnetic field sensors (122, 124; 224; 422, 424) has a means (240) for concentrating at least one component of the transmitter magnetic field (127) and/or the disturbing magnetic field (301).

3. The sensor device (120) according to claim 2, characterized in that the mechanism (240) is configured for differently influencing the transmitter magnetic field (127) and the disturbing magnetic field (301); and/or the mechanism (240) is disposed within or outside a housing of the sensor device (120); and/or the mechanism (240) is oriented and/or positioned according to magnetic environmental conditions.

4. A sensor device (120) according to claim 2 or 3, characterized in that at least one of the magnetic field sensors (122, 124; 224; 422, 424) has means (240) for shielding and means (240) for concentration, wherein the means (240) act differently on the magnetic field (127, 301); or at least one first of the magnetic field sensors (122, 124; 224; 422, 424) has means (240) for shielding and at least one second of the magnetic field sensors (122, 124; 224; 422, 424) has means (240) for concentration.

5. Sensor device (120) according to one of the preceding claims, characterized in that the detection direction of at least one magnetic field sensor (124; 224; 424) is rotated relative to at least one detection direction of at least one other magnetic field sensor (122; 422); and/or at least one of the magnetic field sensors (122, 124; 224; 422, 424) has a mechanism for at least partially compensating for the disturbing magnetic field (301).

6. The sensor device (120) according to one of the preceding claims, characterized in that the sensor device (120) is configured for detecting the magnitude of a deviation of the transmitter magnetic field (127) from the disturbing magnetic field (301) such that a comparator threshold value is not exceeded.

7. Sensor device (120) according to one of the preceding claims, characterized in that the magnetic field sensor (122, 124; 224; 422, 424) is configured or oriented such that at least in a part of the spatial angular range which can be occupied by the disturbing magnetic field (301) an opposite or non-codirectional part of a signal error is larger than a codirectional part of the signal error, wherein the signal error represents the difference in the magnetic field sensor signal between the absence of an external disturbing magnetic field and the presence of an external disturbing magnetic field.

8. Sensor device (120) according to one of the preceding claims, characterized in that each of the magnetic field sensors (122, 124; 224; 422, 424) is designed for magnetic field detection at least in two axes, in particular each of the magnetic field sensors (122, 124; 224; 422, 424) is designed for determining and outputting a magnetic angle, which is determined from at least two magnetic field components in the respective axial direction (X, Y, Z).

9. Sensor device (120) according to one of the preceding claims, characterized in that the vehicle (100) is a commercial vehicle and/or the magnetic field sensor (122, 124; 224; 422, 424) is designed for measuring the position of the transmitter magnet (126) in the presence of an interference magnetic field (301) of up to 100 mTesla, in particular up to 50 mTesla or up to 25 mTesla.

10. A method (600) for producing a sensor device (120) for a vehicle (100), wherein the method (600) has the following steps:

providing (610) at least two magnetic field sensors (122, 124; 224; 422, 424) for detecting a transmitter magnetic field (127) of the transmitter magnet (126); and

the magnetic field sensors (122, 124; 224; 422, 424) are arranged (620) and/or designed (620) such that the magnetic field resulting from the transmitter magnetic field (127) and the external interference magnetic field (301) of the interference source acts with different intensities in the different magnetic field sensors (122, 124; 224; 422, 424).

11. A method (700) for operating a sensor device (120) for a vehicle (100), wherein the method (700) comprises the following steps:

reading (710) in sensor signals (128, 129; 329) of at least two magnetic field sensors (122, 124; 224; 422, 424) of a sensor device (120) according to one of claims 1 to 9; and

the sensor signals (128, 129; 329) read in (710) are evaluated and processed (720) in order to determine characteristics of the magnetic field (127) of the transmitter.

12. A control device (130) which is set up for carrying out and/or controlling the steps of the method (700) according to claim 11 in a respective unit (132, 134).

13. A sensor system (110) for a vehicle (100), wherein the sensor system (110) has the following features:

the sensor device (120) according to one of claims 1 to 9; and

the control device (130) according to claim 12, wherein the control device (130) is connected to the sensor device (120) in a manner such that it can transmit signals.

14. A computer program which is set up for carrying out and/or controlling the method (700) according to claim 11.

15. A machine-readable storage medium on which a computer program according to claim 14 is stored.

Technical Field

The present invention relates to a sensor device for a vehicle, a method for producing a sensor device for a vehicle, a method for operating a sensor device for a vehicle and a sensor system for a vehicle, in particular to the field of magnetic field sensing devices.

Background

In particular, there are numerous methods for protection against external magnetic fields, such as metallic shielding, additional sensors for detecting such external magnetic fields, or attempts to calculate the external magnetic field from the useful signal.

Disclosure of Invention

Against this background, the object of the present invention is to provide an improved sensor device for a vehicle, an improved method for producing a sensor device for a vehicle, an improved method for operating a sensor device for a vehicle, and an improved sensor system for a vehicle.

This object is achieved by a sensor device for a vehicle, a method for producing a sensor device for a vehicle, a method for operating a sensor device for a vehicle, a sensor system for a vehicle and a corresponding computer program according to the independent claims.

According to various embodiments, the sensor device or the sensor combination can be designed in particular in such a way that the influence of an external magnetic field on the device acts differently on the sensors, sensor elements, sensor chips or sensor channels of the device, wherein the effect of the external magnetic field additionally differs from the effect of the transmitter magnetic field, more precisely there is a systematic or recognizable difference. It can also be used in methods for adjustment and identification using such devices. This is achievable, although the external magnetic field acts as a so-called universal cause influence and thus a shielding effect can also be achieved on the basis of the different ways of acting of the external magnetic field on the measurement signal and the given distinguishability of the external magnetic field from the movement of the transmitter magnet.

Advantageously, according to embodiments, it may in particular be achieved that the magnetic sensor device system is protected from interference caused by external magnetic environmental conditions or external magnetic fields. Such protection is achieved, for example, by the requirements of automotive industry safety standards, such as ISO 26262. In this way, according to the embodiments, a higher protection against external magnetic fields and protection for the occupants and users of the sensor device can be achieved, since the influence of common causes of external magnetic fields can be detected. The sensors, sensor chips or sensor channels for sensing the main functions, such as displacement measurement, angle measurement, etc., can therefore also recognize or be made aware of the presence of interfering magnetic fields and can communicate implicitly or explicitly via the channels present, without additional sensors and channels being required for this purpose in particular. Furthermore, not only can another region of the external magnetic field be shielded with respect to strength and geometric orientation, but also an at least partial compensation of the influence on the useful signal can be achieved by means of an inverse calculation of the external magnetic field. This advantage is particularly pronounced, in particular in relation to applications in which a further measuring range is required or can be achieved, since the requirements for an extended measuring range and the requirements for magnetic field protection can be achieved with little effort in a synergistic effect. A further advantage is the implementation of a higher ASIL level (automotive safety integrity level) and a larger range of operations with the same technology or required integrity level of the same components, which enables a scale effect and thus cost reduction as well as compactness. Structural space and costs can be saved compared to shielding the entire circuit board. Improved protection may be achieved compared to merely attenuating the external magnetic field. Furthermore, this is possible without the use of cost-intensive components, such as high-permeability alloys, expensive chips with special software, whereby good availability and cost savings of components can be achieved. But also interference effects between the conventional shield and the useful or transmitter magnetic field of the transmitter magnet, resulting in improved protection and reduced design constraints, etc.

The sensor device for a vehicle is provided with at least two magnetic field sensors for detecting a transmitter magnetic field of a transmitter magnet, wherein the magnetic field sensors are designed in such a way that magnetic fields generated by the transmitter magnetic field and an external interference magnetic field of an interference source for the magnetic field sensors play a role in different strengths with respect to a signal value of the magnetic field sensor concerned.

The sensor device may have a transmitter magnet. Each of the magnetic field sensors may have at least one measuring receiver (Messaufnehmer). These magnetic field sensors may be arranged on a common circuit board or on a plurality of circuit boards. The circuit board may be a semiconductor chip.

According to one embodiment, at least one of the magnetic field sensors may have a mechanism for shielding the transmitter magnetic field and additionally or alternatively disturbing at least one component of the magnetic field. The means for shielding can be designed to at least attenuate the transmitter magnetic field and additionally or alternatively to disturb at least one component of the magnetic field for the measurement receiver. Such an embodiment offers the advantage that the influence of interfering magnetic fields can be identified or can be identified simply and reliably.

At least one of the magnetic field sensors may also have a mechanism for concentrating the transmitter magnetic field and additionally or alternatively disturbing at least one component of the magnetic field. The means for concentrating may be designed to concentrate the transmitter magnetic field and additionally or alternatively at least one component of the interference magnetic field on the measurement receiver. Such an embodiment offers the advantage that the magnetic interference effects can be reliably and accurately recognized.

The means for shielding and additionally or alternatively the means for concentrating can be designed to influence the transmitter magnetic field and the interference magnetic field differently. Additionally or alternatively, the means for shielding and additionally or alternatively the means for concentrating may be provided within or outside the housing of the sensor device. Additionally or alternatively, the means for shielding and additionally or alternatively the means for concentrating may be oriented and additionally or alternatively positioned according to magnetic environmental conditions. Such an embodiment offers the advantage that the influence of interfering magnetic fields can be identified or can be identified safely and without difficulty.

In particular, at least one of the magnetic field sensors may have means for shielding and means for concentration. The mechanism can act differently on the magnetic field in this case. The mechanism can, for example, act with different strengths in different spatial directions of the magnetic field. Alternatively, at least a first of the magnetic field sensors may have a mechanism for shielding and at least a second of the magnetic field sensors may have a mechanism for concentration. Such an embodiment offers the advantage that, depending on the requirements and the fact of implementation of the sensor device, suitable and reliable measures for detecting interfering magnetic fields can be taken.

According to one embodiment, the detection direction of at least one magnetic field sensor can be rotated relative to the detection direction of at least one other magnetic field sensor. The detection direction may relate to the direction of at least one detection axis, sensing axis or sensitive axis of the magnetic field sensor. Such an embodiment offers the advantage that different influences of the magnetic field on the magnetic field sensor can be achieved, wherein costs and components can be saved.

Furthermore, at least one of the magnetic field sensors may have a mechanism for at least partially compensating for an interfering magnetic field. The mechanism may be configured to execute a compensation algorithm. Such an embodiment offers the advantage that the disturbing magnetic field can already be calculated on the sensor side.

According to one embodiment, each of the magnetic field sensors can be configured for at least two-axis magnetic field detection. In particular, each of the magnetic field sensors can be designed to determine and output a magnetic angle which is determined from at least two magnetic field components in the respective axial direction. Such an embodiment offers the advantage that the accuracy of the interference field determination can be increased.

The vehicle may also be a commercial vehicle. Additionally or alternatively, the magnetic field sensor can be designed for measuring the position of the transmitter magnet in the presence of an interference magnetic field of a strength of up to 100 millitesla (mT), in particular up to 50 millitesla (mT) or up to 25 millitesla (mT). Additionally or alternatively, the magnetic field sensor can be designed for measuring the position of the transmitter magnet in the presence of an interfering magnetic field of a strength of at least 1.25 millitesla (mT), in particular up to 3.75 millitesla (mT). Such an embodiment offers the advantage that also increased environmental conditions suitable for commercial vehicles can be met.

A method for producing a sensor device for a vehicle is also proposed, wherein the method has the following steps:

providing at least two magnetic field sensors for detecting the transmitter magnetic field of the transmitter magnet; and

the magnetic field sensors are arranged and additionally or alternatively designed such that the magnetic fields generated by the transmitter magnetic field and the external interference magnetic field of the interference source play a role of different strengths in the different magnetic field sensors.

Embodiments of the sensor device described above can be manufactured by implementing this method.

Furthermore, a method for operating a sensor device for a vehicle is proposed, wherein the method comprises the following steps:

reading in sensor signals of at least two magnetic field sensors of one embodiment of the sensor device; and

the sensor signals read in the reading step are evaluated in order to determine a characteristic of the magnetic field of the transmitter.

The characteristic of the magnetic field of the transmitter can also be understood here as the position of the transmitter magnet.

The method or the individual steps of the method can be carried out using a control device.

The solution proposed here also provides a control device which is designed to implement, control or implement the steps of a variant of the method proposed here in the respective means. Furthermore, the object of the invention is achieved quickly and efficiently by means of this embodiment variant of the invention in the form of a control device.

For this purpose, the control device may have at least one arithmetic unit for processing signals or data, at least one memory unit for storing signals or data, at least one interface to the sensor or the actuator for reading in sensor signals from the sensor or for outputting control signals to the actuator, and/or at least one communication interface for reading in or outputting data, which are embedded in the communication protocol. The arithmetic unit may be, for example, a signal processor, a microcontroller or the like, wherein the memory unit may be a flash memory, an electrically erasable programmable read-only memory (EEPROM) or a magnetic memory unit. The communication interface can be designed for wireless and/or wired reading in or outputting of data, wherein the communication interface, which can read in or output data by wire, can read in these data, for example electrically or optically, from or output these data to the respective data transmission line.

A control device is understood to mean an electrical device which processes the sensor signals and outputs control and/or data signals as a function thereof. The control device can have an interface, which can be configured in hardware and/or software. In the case of a hardware configuration, the interface can be, for example, part of the system-specific integrated circuit (ASIC) described, which contains the different functions of the control device. However, it is also possible for the interface to be an integrated circuit of its own or to be composed at least in part of discrete components. In the case of a software configuration, the interface can be a software module which is present on the microcontroller, for example, in parallel with other software modules.

A sensor system for a vehicle is also proposed, wherein the sensor system has the following features:

one embodiment of the above sensor device; and

an embodiment of the above control device, wherein the control device is connected to the sensor device in a manner that enables signal transmission.

A computer program product or a computer program with a program code is advantageously provided, which can be stored on a machine-readable carrier or storage medium, such as a semiconductor memory, a hard disk memory or an optical memory, and which is used, in particular, when the program product or the program is executed on a computer or a device, to carry out, implement and/or actuate the steps of the method according to one of the embodiments described above.

The different embodiments can in particular relate to the arrangement of a magnetic field Sensor and, if appropriate, further elements with magnetic properties in a Sensor Cluster (Sensor-Cluster) which comprises more than one Sensor or Sensor chip, sensing hardware elements or sensing channels, in particular for the implementation of safety-critical applications. In addition, embodiments also include technical implementation methods to accomplish the tasks.

Drawings

Embodiments of the solution presented herein are further elucidated in the following description with reference to the figures. Here:

FIG. 1: a schematic diagram of a vehicle including a sensor system according to one embodiment is shown;

FIG. 2: a schematic diagram illustrating a sensor device according to one embodiment;

FIG. 3: a schematic diagram illustrating a sensor system according to one embodiment;

FIG. 4: a schematic diagram illustrating a sensor device according to one embodiment;

FIG. 5: a schematic diagram illustrating a sensor device according to one embodiment;

FIG. 6: a flow diagram illustrating a method for manufacturing in accordance with one embodiment; and

FIG. 7: a flow diagram of a method for operation is shown, in accordance with one embodiment.

Detailed Description

FIG. 1 shows a schematic view of a vehicle 100 including a sensor system 110 according to one embodiment. The sensor system 110 has a sensor device 120 and a control device 130.

The sensor device 120 has at least two magnetic field sensors 122 and 124. The first magnetic field sensor 122 has a first measurement receiver 123 or a measurement value receiver 123. The second magnetic field sensor 124 has a second measurement receiver 125 or a measured value receiver 125. According to the exemplary embodiment shown here, the sensor device 120 also has a transmitter magnet 126, which generates a transmitter magnetic field 127. Each of the magnetic field sensors 122 and 124 is configured to detect a transmitter magnetic field 127 of a transmitter magnet 126.

The magnetic field sensors 122 and 124 are designed such that the transmitter magnetic field 127 and the external interference magnetic field of the interference source act differently on the measurement receivers 123 and 125 of the magnetic field sensors 122 and 124. The first magnetic field sensor 122 is configured to provide a first sensor signal 128. The second magnetic field sensor 124 is designed to provide a second sensor signal 129.

The control device 130 is connected to the sensor device 120 in such a way that it can transmit signals. The control device 130 is designed to drive the sensor device 120. For this purpose, the control device 130 further includes a reading means 132 and an analysis processing means 134. The read-in mechanism 132 is designed to read in the sensor signals 128 and 129 from the magnetic field sensors 122 and 124 of the sensor device 120. The evaluation unit 134 is designed to evaluate the sensor signals 128 and 129 read in by means of the read-in unit 132 in order to determine the transmitter magnetic field 127. Here, the control device 130 is configured to carry out the method described with reference to fig. 7.

According to one embodiment, the vehicle 100 is a commercial vehicle, such as a truck or the like. The magnetic field sensors 122 and 124 are designed for the magnetic field strength of the interference magnetic field, wherein the measurement of the transmitter magnetic field can be used to detect the transmitter magnet position.

Fig. 2 shows a schematic view of a sensor device 120 according to an embodiment. The sensor device 120 corresponds or is similar to the sensor device of fig. 1. Here, the sensor device 120 is shown in a side view. The sensor device 120 according to the exemplary embodiment shown here has a first magnetic field sensor 122, a second magnetic field sensor 124 and a third magnetic field sensor 224, which are arranged on a circuit board 221 or on a chip or sensor chip 221. Here, the magnetic field sensors 122, 124, and 224 are provided on a first main surface of the two main surfaces of the circuit board 221. The sensor device 120 also has a transmitter magnet 126, which generates a transmitter magnetic field 127. The transmitter magnet 126 is disposed adjacent to the magnetic field sensors 122, 124, and 224. Furthermore, the first magnetic field sensor 122 has a means 240 for shielding and/or for concentrating at least one component of the transmitter magnetic field 127 and/or of an external interference magnetic field. The mechanism 240 for shielding and/or for concentration is provided on the second main surface of the two main surfaces of the circuit board 221. Thus, the circuit board 221 is arranged between the magnetic field sensors 122, 124 and 224, in particular the first magnetic field sensor 122, and the means 240 for shielding and/or for concentration.

According to one embodiment, the means 240 for shielding and/or for concentrating are configured for differently influencing the transmitter magnetic field 127 and the external interference magnetic field. Moreover, according to one embodiment, the mechanism for shielding 240 and/or for concentrating 240 is oriented and/or positioned according to magnetic environmental conditions in the environment of the sensor device 120. Even though not explicitly shown in fig. 2, the sensor device 120 may also have a housing. Here, the mechanism 240 for shielding and/or for concentration may be provided inside or outside the housing. According to one embodiment, the second magnetic field sensor 124 and/or the third magnetic field sensor 224 may also have a further mechanism 240 for shielding and/or for concentration.

According to one embodiment, one or at least one of the magnetic field sensors 122, 124 and 224, for example the first magnetic field sensor 122, has a mechanism 240 for shielding and/or for concentration. Alternatively, one or at least one of the magnetic field sensors 122, 124 and 224, for example the first magnetic field sensor 122, may have means for shielding and means for concentration, wherein the respective means act on the magnetic field differently. Alternatively, at least one first magnetic field sensor of the magnetic field sensors 122, 124 and 224 may have a mechanism for shielding and at least one second magnetic field sensor of the magnetic field sensors 122, 124 and 224 may have a mechanism for concentration.

In other words, in order to achieve the following state (i.e. magnetic field sensors 122, 124 and 224 are configured such that transmitter magnetic field 127 and the external interference magnetic field of the interference source act differently on the measurement receivers of magnetic field sensors 122, 124 and 224), in particular the following possibilities exist:

using a shield or shield as a magnetic actuator or means 140, which produces a targeted attenuation of at least one component of the external magnetic interference field at the location of the at least one magnetic field sensor 122, 124 and 224. The manner of this attenuation is different here, in particular in direction and/or overall field strength, depending on the following: i.e. whether it concerns an external interference magnetic field or a transmitter magnetic field 127 of the transmitter magnet 126, which is changed, for example, by the movement of the transmitter magnet 126. The guard may be mounted inside or outside the sensor (cluster) housing. Furthermore, such a mechanism 140 can be realized by targeted installation, for example with regard to the angle, position, etc. of the magnetic field sensors 122, 124 or 224 with respect to the magnetic environment, for example with respect to metal parts in the environment of the sensor device 120.

Using magnetic concentrators as manipulators or means 140, which produce a concentration of at least one component of the transmitter magnetic field 127 and/or of the external magnetic interference field in a targeted manner at the location of the at least one magnetic field sensor 122, 124 and 224. The concentration is different here, in particular in direction and/or overall field strength, depending on the following: i.e. whether it concerns an external interference magnetic field or a transmitter magnetic field 127 of the transmitter magnet 126, which is changed, for example, by the movement of the transmitter magnet 126. The concentrator may be mounted inside or outside the sensor (cluster) housing. Furthermore, such a mechanism 140 can be realized by targeted installation, for example with regard to the angle, position, etc. of the magnetic field sensors 122, 124 or 224 with respect to the magnetic environment, for example with respect to metal parts in the environment of the sensor device 120.

A combination of shield and concentrator, wherein the effect on the transmitter magnetic field 127 is different at the same location compared to the effect on the external interference magnetic field. Here, the transmitter magnetic field 127 may be enhanced and external interfering magnetic fields may be attenuated, or vice versa. Furthermore, there may be a decay or increase in the case of two magnetic fields, the strength of which may differ significantly. This can be achieved by a geometric arrangement of shields and concentrators. This will work if the transmitter magnetic field and the disturbing magnetic field do not exactly have the same direction vector.

A combination of shield and concentrator, wherein the combination acts on the signal values differently with respect to the different magnetic field sensors 122, 124 or 224 (i.e. at different positions). For example, magnetic field sensors 122, 124, or 224 may experience a magnetic field that changes in a first manner, while other magnetic field sensors experience a magnetic field that changes or is constant in a second manner.

FIG. 3 shows a schematic diagram of a sensor system 110 according to an embodiment. The sensor system 110 corresponds to or is similar to the sensor system of fig. 1. A top view of the sensor system 110 is shown here. In the sensor system 110, a sensor device 120 is shown here, which corresponds or is similar to the sensor device from one of the above-described figures, and a control device 130, which has logic components, for example comparators or the like. Furthermore, fig. 3 schematically shows an external interference magnetic field 301 of an interference source or a projection of this magnetic field into a two-dimensional drawing plane or a section of the external magnetic field lying in the drawing plane.

The sensor device 120 according to the exemplary embodiment shown here has a first magnetic field sensor 122, a second magnetic field sensor 124 and a third magnetic field sensor 224, which are arranged on a circuit board 221 or on a chip or sensor chip 221. The sensor device 120 also has a transmitter magnet 126, which generates a transmitter magnetic field 127. The transmitter magnet 126 is disposed adjacent to the magnetic field sensors 122, 124, and 224. Furthermore, the first magnetic field sensor 122 has a means 240 for shielding and/or for concentrating at least one component of the transmitter magnetic field 127 and/or the external interference magnetic field 301. The sensor device 120 thus corresponds to the sensor device of fig. 2, with the exception that: in the illustration of fig. 3, it can be seen that the third magnetic field sensor 224 is arranged rotationally with respect to the other magnetic field sensors 122 and 124. Here, the detection direction of the third magnetic field sensor 224 is rotated with respect to the detection directions of the first and second magnetic field sensors 122 and 124.

In other words, the state (i.e. the magnetic field sensors 122, 124 and 224 are designed such that the transmitter magnetic field 127 and the external interference magnetic field 301 act differently on the measurement receivers of the magnetic field sensors 122, 124 and 224) is also achieved by a rotation of the orientation of at least one magnetic field sensor, here the third magnetic field sensor, relative to the other magnetic field sensors, here the magnetic field sensors 122 and 124. The sensor axes of the magnetic field sensors 122, 124 and 224 are oriented in such a way that the manner of influence is different, depending on the following: that is, it is the external interference magnetic field 301 or the transmitter magnetic field 127 of the transmitter magnet 126, which is changed, for example, by the movement of the transmitter magnet 126.

In the illustration of fig. 3, the first sensor signal 128 and the second sensor signal 129 are also symbolically illustrated analogously to fig. 1 and, in addition, a third sensor signal 329 is symbolically illustrated, wherein the third sensor signal 329 is transmitted between the third magnetic field sensor 224 and the control device 130.

Fig. 4 shows a schematic view of a sensor device 120 according to an embodiment. In the example shown in fig. 4, the solution proposed here is not directly visible to the implementation, as it is further shown in the following figures, in contrast to the implementation of the rotation of the sensor cascade 2. The sensor device 120 corresponds or is similar to the sensor device from one of the preceding figures. In the sensor device 120, the circuit board 221, the first magnetic field sensor 122, the second magnetic field sensor 124, the further first magnetic field sensor 422 and the further second magnetic field sensor 424 are shown here in the illustration of fig. 4. More precisely, the sensor device 120 in fig. 4 corresponds to the sensor device in fig. 1, with the exception that: a further first magnetic field sensor 422 and a further second magnetic field sensor 424 are provided. The further first magnetic field sensor 422 and the further second magnetic field sensor 424 serve to extend the measuring range of the sensor device 120. In addition, a three-axis XYZ reference coordinate system is shown in fig. 4. According to the embodiment shown here, the detection directions of the magnetic field sensors 122, 124, 422 and 424 are the same or the same in the XY plane of the XYZ reference coordinate system. In the illustration of fig. 4, the wiring of the components 124 and 412 is selected, which can be used to extend the measurement range or used in the opposite way.

Fig. 5 shows a schematic view of a sensor device 120 according to an embodiment. The sensor arrangement 120 in fig. 5 corresponds here to the sensor arrangement in fig. 4, with the exception that: the second magnetic field sensor 124 and the further second magnetic field sensor 424 rotate in the XY plane of the XYZ reference coordinate system relative to the first magnetic field sensor 122 and the further first magnetic field sensor 422. More precisely, the detection directions of the second magnetic field sensor 124 and the further second magnetic field sensor 424 are rotated in the XY plane of the XYZ reference coordinate system with respect to the detection directions of the first magnetic field sensor 122 and the further first magnetic field sensor 422.

With reference to the above figures, it should be noted that: according to one embodiment, at least one of the magnetic field sensors 122, 124 or 122, 124, 224 or 122, 124, 422, 424 may have a mechanism for at least partially compensating for the disturbing magnetic field 301. In other words, at least one of the magnetic field sensors 122, 124 or 122, 124, 224 or 122, 124, 422, 424 may have a mechanism, e.g. an algorithm or the like, for compensating or partially compensating the external magnetic field 301. Although the compensation of at least one of the magnetic field sensors 122, 124 or 122, 124, 224 or 122, 124, 422, 424 only partially or only in a limited magnetic field strength range, influences that can be used for identification also occur at the level of the sensor device 120 or the sensor system 110.

Further, with reference to the above drawings, it should be noted that: each of the magnetic field sensors 122, 124 or 122, 124, 224 or 122, 124, 422, 424 may be configured for at least two-axis magnetic field detection. In this case, each of the magnetic field sensors 122, 124 or 122, 124, 224 or 122, 124, 422, 424 can be designed to determine and output a magnetic angle, which is determined from at least two magnetic field components in the respective axial direction.

Another aspect for narrower designs is also contemplated. For example, the two features describe different effects on the channel. In one embodiment, a design can be set such that no deviations (or only small deviations/below the boundaries of the comparator) occur in the range of homogeneous disturbing magnetic fields (more widely required) with small to large intensities 0 to 1000 or 0 to 3000A/m d. This does not lead to the detection of the magnetic field (or only in a comparatively small range of spatial angles). In one embodiment, a design may be set such that the slightly small up to large magnetic fields cause only small value errors in the signal that are tolerable.

Both can be considered as important aspects for the stability of the system so as to be tolerable with respect to errors whose contribution is small enough not to jeopardize the requirement for the maximum allowable error in the signal values. This causesPartial isotropy of these effectsOr otherwise limit the reverse direction

Furthermore, a design can be set such that signal errors (at least in the part of the spatial angular range of the external disturbing magnetic field and the position of the transmitter magnet, ideally at every angle and in every position) are reduced. That is, the syntropic component of the error grows more slowly than the divergence of the two sensor/channel measurements (millimeters). This results in a minimum influence of the measures (i.e. the action of the shields or concentrators) or methods or a minimum angle between the sensors etc.

FIG. 6 illustrates a flow diagram of a method 600 for manufacturing, according to one embodiment. The method 600 for manufacturing may be implemented for manufacturing a sensor device for a vehicle. The method 600 for producing can be carried out here for producing a sensor device from one of the above-described figures or a similar sensor device.

The method 600 for manufacturing has a providing step 610 and a setting and/or structuring step 620. In a providing step 610, at least two magnetic field sensors for detecting a transmitter magnetic field of a transmitter magnet are provided. In a setting and/or configuration step 620, the magnetic field sensors are set and/or configured in such a way that the magnetic fields generated by the transmitter magnetic field and the external interference magnetic field of the interference source play a role of different strengths in the different magnetic field sensors.

Fig. 7 shows a flow diagram of a method 700 for operation according to an embodiment. The method 700 for operating may be implemented for operating a sensor device for a vehicle. The method 700 for operating can be implemented in conjunction with a sensor device from one of the above-described figures or a similar sensor device. Furthermore, the method 700 for operating can be carried out using a control device from one of the above-described figures or a similar control device.

The method 700 for operation has a reading step 710 and an evaluation step 720. In a reading step 710, sensor signals of at least two magnetic field sensors of the sensor device are read in. In an evaluation step 720, the sensor signals read in the read-in step 710 are evaluated to determine a characteristic of the magnetic field of the transmitter.

List of reference numerals:

100 vehicle

110 sensor system

120 sensor device

122 first magnetic field sensor

123 first measurement receiver or measured value receiver

124 second magnetic field sensor

125 second measurement receiver or measured value receiver

126 transmitter magnet

127 transmitter magnetic field

128 first sensor signal

129 second sensor signal

130 control device

132 read-in mechanism

134 analysis processing mechanism

221 Circuit Board or (sensor) chip

224 third magnetic field sensor

240 mechanism for shielding and/or for concentration

301 external interference magnetic field

329 third sensor signal

422 another first magnetic field sensor

424 another second magnetic field sensor

600 method for manufacturing

610 providing step

620 set up and/or construction steps

700 method for operation

710 read-in step

720 analyze the processing steps.