FR3032788A1 - SENSOR DEVICE FOR SEIZING ROTATION ANGLES OF A ROTARY COMPONENT OF A VEHICLE - Google Patents

Abstract

"Sensor device for capturing rotational angles of a rotating component of a vehicle" Sensor device (1) for capturing rotational angles (α) of a rotary component (3) coupled to two generators of value (20, 30), - the first (20) and a first sensor (14) forming a first angular sensor (7) which generates a first angular information (ai), - the second (30) and a second sensor ( 16) forming a second angular sensor (9) which generates a second angular information (α2). The generators (20, 30) each have an electroconductive detection range (26, 36) and the sensors (14, 16) each have a plurality of detection coils (Li, L2, L3, L4, L5, L6). The detection range (26, 36) of each generator (20, 30) influences the inductance of the coils (Li, L2, L3, L4, L5, L6) so that the coil signal varies periodically and measures the angle of rotation α of the rotary component 3.

Description

FIELD OF THE INVENTION The present invention relates to a sensor device for capturing rotational angles of a rotating component of a vehicle, coupled to two measurement value generators, the first measurement value generator. and a first measurement value sensor forming a first angular sensor which generates a first angular information dependent on the rotational movement of the first rotary component, a second measurement value generator and a second measurement value sensor forming a second sensor. angular which generates a second angular information from the rotational movement of the rotary component and the current rotation angle of the rotary component is determined from the first angular information and the second angular information. State of the art The steering angle sensors (or steering angle) must measure up to six turns of the steering wheel, which corresponds to an angular range of approximately 2000 °. Thus, in addition to the angular measurement, it is necessary to count the steps of periodicity of the rotation. According to the state of the art, steering angle sensors are known which measure the steering angle or steering angle for several turns of the steering wheel by means of two toothed gears coupled to the steering column. direction via a large toothed gear. In the middle of the pinions there are permanent magnets which make it possible to determine the angle of the pinions using magnetic field sensors. The two gears have a slightly different number of teeth so that the ratio of the angles also makes it possible to determine the number of turns made by the gears. This makes it possible to obtain the angle of the steering wheel with several turns. In this known embodiment, two gears and two magnetic field sensors are required to determine the actual angle of rotation. It is also possible to use eddy current sensors, which measure the inductance of a conductive path geometry. In general, a metal conductor is moved near the geometry of the conductive path. This prevents the electric field from passing through and thus modifies the inductance of the geometry of the conductive path. If the conducting path is realized as an oscillating circuit, the resonance frequency will depend on the inductance of the geometry of the conductive path and thus on the position of the nearby metallic conductor.

DE 10 2008 011 448 A1 discloses, for example, a device for gripping an angle of rotation. The device comprises a generator and sensors that detect the variations of a physical quantity in the form of digital signals which can be used as a function of the variation of the rotation angle of a rotating part. The rotating part generally comprises a satellite coupled to its periphery and driven in rotation by the rotation of the part; there is preferably an angular sensor which drives, via an axially coupled hypocycloidal transmission, a hypocycloid disk or a hypocycloid pinion whose rotational speed is transformed by the hypocycloidal transmission so as to determine the number of revolutions. the rotating part and the absolute turning angle over several turns of the steering column, using a rotation sensor system. DESCRIPTION AND ADVANTAGES OF THE INVENTION The vehicle sensor device as defined above has the advantage, with respect to the state of the art, of reducing measurement errors caused by variations in distance. between the measuring value generator and the measuring value sensor. Such distance variations may for example result in corresponding measurement value curves having different maximum height values. Thus, for example, the electro-conductive detection range may not be exactly parallel to the detecting coils in its movement but be inclined with respect to the detection coils. In other words, the present invention relates to a sensor device for capturing the rotational angles of a rotating component of a vehicle. The rotary component is coupled to two measurement value generators, a first measurement value generator and a first measurement value sensor forming a first angular sensor; this generates a first angular information dependent on the rotational movement of the rotating component; a second measuring value generator and a second measuring value sensor forming a second angular sensor which generates a second angular information dependent on the rotational movement of the rotating component. The current rotation angle of the rotating component is determined from the first angular information and the second angular information. According to the invention, the measurement value generators each have an electro-conductive detection range. The measurement value sensors each have a plurality of sense coils, the sense coil of each measurement value generator influences the inductance of the corresponding sense coils of the respective measurement value detector so that the corresponding coil signal of at least one sensing coil varies periodically due to the rotational movement of the rotating component and is used as a measure of the rotational angle of the rotating component. Thus, the operating and control unit receives the coil signals from the measurement value sensors and normalizes the different coil signals of the respective measurement value sensor. In the embodiments of the present invention, the inductance of the sense coils in the measurement value sensor depends on the overlap or overlap with the corresponding detection range of the measurement value generator. The inductance of the respective sensing coil is determined by frequency measurement of an oscillating circuit with the sensing coil or by direct measurement of the inductivity using the imaginary part of the reactor. oscillating circuit for a frequency or mixing with a reference frequency. The signal is then recalculated for the overlap angle of the sense coil with the detection ranges.

According to a particularly advantageous characteristic, the operating and control unit generates a first coil signal, normalized for each coil signal, this first signal being calculated from the current value of the coil signal and its value. minimum value and its maximum value.

Preferably, the operation and control unit forms the first normalized coil signal as a ratio between a first difference of the current value and the minimum value of the corresponding coil signal and a corresponding second difference. to the maximum value and the minimum value of the coil signal. The minimum value and the maximum value of the corresponding coil signal are determined in advance as a function of the rotation of the measurement value generator, for example by the operating and control unit which records it.

According to an advantageous development of the sensor device of the invention, the operating and control unit calculates for each first normalized coil signal, of the respective measuring value sensor, a second standardized coil signal formed the first normalized coil signal and a calculated sum signal from at least two first normalized coil signals of the respective measurement value sensor. The operation and control unit may compare the normalized coil signals of the respective measurement value sensor and the sum signal for the second normalized coil signal from the first normalized coil coil signal. corresponding detection and the first normalized coil signal of the other detection coil, which corresponds to the largest value. According to another advantageous development of the sensor device according to the invention, the measuring value generators are each made in the form of an annular disc provided with a toothed crown, these discs being rotated by the component rotating by means of a main ring gear, the detection pads being in the form of a ring-ring segment in the region of the outer edge of the respective annular disk and corresponding to an angle of minus 180 °. In addition, the measurement value sensors each have three detection coils made in the form of circular ring segments regularly distributed at the periphery of a circle on a common circuit support and each having an angle of 90 °. The measurement value sensors on the circuit support and the measurement value generators are associated so that the first measurement value generator covers with its outer marginal area, the detection coils of the first value sensor. the second measurement value generator covers with its outer edge area, the detection coils of the second measurement value sensor. In addition, the first measurement value sensor can generate the first angular information based on the number of teeth of a first ring gear of the first measurement value generator with a first periodicity and the second measurement value generator can giving the second angular information based on the ring gear of a second ring gear of the second measuring value generator with a second periodicity, different from the first periodicity. State of the art The angle of rotation sensors measure up to six turns of a steering wheel, which corresponds to an angular range of about 2000 °. Thus in addition to the angular measurement, it is necessary to count the segments of periodicity of rotation. According to the state of the art, steering wheel angle sensors are known which measure the steering angle or steering angle over several turns made by the steering wheel, using two gear wheels coupled via a steering wheel. a large toothed wheel secured to the steering column. In the middle of the gears there are permanent magnets with which the magnetic field sensors make it possible to determine the angle of the gears. Both gears have a slightly different number of teeth so that the ratio of angles can be determined from the respective rotation of the gears. Thus, it is possible to determine the angle of the steering wheel making several rotations. This known embodiment requires two gears and thus also two magnetic field sensors to determine the current rotation angle. Eddy current sensors measuring the inductance of a geometry of conductive paths have also been used. Generally, near the geometry of the conductive path, a metal conductor is displaced. This avoids the passage of the electric field and modifies the inductance of the conductive path geometry. If, with the conductive path, an oscillating circuit is formed, the resonance frequency will depend on the inductance of the geometry of the conductive path and thus on the position of the metallic conductor located in the vicinity. This makes it possible to determine the position of the metal conductor. Document DE 10 2008 011 448 A1 describes, for example, a device for detecting an angle of rotation. The described device comprises a generator and sensors which, depending on the rotational angle variation of a rotating component, detects operable signals in digital form from variations of a physical quantity produced by the generators. The rotating component generally has satellites coupled to its periphery and rotated by the rotation of the component, these satellites having a smaller periphery with preferably an angular sensor which drives, via a hypocycloidal transmission, axially coupled a hypocycloidal disk or a hypocycloidal toothed ring which is also rotating and whose speed of rotation is reduced by the hypocycloidal transmission so as to thereby determine the number of revolutions of the rotary component and the absolute turning angle over several turns made by the column of direction using a rotation sensor system. DESCRIPTION AND ADVANTAGES OF THE INVENTION The subject of the present invention is a sensor device of the type defined above, characterized in that the measurement value generators each have an electroconductive detection range and the value sensors. each of the plurality of detection coils, the detection range of each measurement value generator influences the inductance of the corresponding sense coils of the respective measurement value sensor so that the corresponding coil signal of at least one coil of detection periodically varies by the rotational movement of the rotary component to be used as a measure of the rotation angle of the rotary component, an operating and control unit receiving the coil signals of the measuring value sensor and normalizing the different coil signals of the respective measurement value sensors.

The present invention will now be described in more detail with the help of examples of rotation angle sensor devices shown in the accompanying drawings in which the same elements are given the same references. Thus: FIG. 1 is a schematic top view of an exemplary embodiment of a sensor device according to the invention for capturing the rotational angles of a rotating component of a vehicle; FIG. 2 is a view diagrammatic top view of a second measurement value generator of the sensor device according to the invention for capturing the rotational angles of a rotating component of a vehicle according to FIG. 1, FIGS. 3 to 6 each show a schematic top view of an angular sensor of a sensor device according to the invention for capturing rotational angles of a rotating component of a vehicle according to FIG. 1, FIGS. 3 to 6 showing other positions angle of the angular sensor. FIG. 7 shows a characteristic curve diagram with three raw value characteristics provided by the angular detector detection coils, FIG. 8 shows a first higher resolution (DI) range of the characteristic curve diagram according to FIG. 7, Fig. 9 shows a second higher resolution range (DII) of the characteristic curve diagram of Fig. 7, Fig. 10 shows a third higher resolution range (DIII) of the characteristic curve diagram of Fig. 7 after a FIG. 11 shows a higher resolution fourth range (DIV) of the characteristic curve diagram of FIG. 7 after normalization; FIG. 12 shows a higher resolution range (DV) of the characteristic curve diagram of FIG. 11, 3032788 8 FIG. 13 shows a characteristic curve diagram with a detail of a curve of measurement values. Referring to FIG. 14, a characteristic curve diagram with two angular sensors of the sensor device according to the invention for capturing the rotational angles of a rotating component of the vehicle of FIG. Figure 1, with angular curves obtained by an inverse calculation. DESCRIPTION OF EMBODIMENTS According to FIGS. 1 and 2, in the exemplary embodiment of a sensor device 1 according to the invention, for grasping the angles of rotation α of a rotary component 3 of a The rotary component 3 is coupled with two measuring value generators 20, 30. The first measurement value generator 20 and the first measurement value sensor 14 form a first angle sensor 7 which generates a first angular information. a 1 depending on the rotational movement of the rotary component 3 and a second angular value generator 30 as well as a second measurement value sensor 16 forming a second angular sensor 9 which generates a second angular information a2 depending on the motion of the rotation of the rotary component 3. The current rotation angle a of the rotary component 3 is determined from the first angular information a 1 and the second angular information a2. According to the invention, the measurement value generators 20, 25 each have an electrically conductive detection area 26, 36 and the measurement value sensors 14, 16 each have a plurality of detection coils Li, L2, L3, L4, L5, L6; the detection range 26, 36 of the respective measuring value generator 20, 30 influences the inductance of the detection coils Li, L2, L3, L4, L5, L6 of the respective measuring value sensor 14, 16 so that the corresponding coil signal of at least one detection coil L1, L2, L3, L4, L5, L6, under the effect of the rotational movement of the rotary component 3, changes periodically and is used as a measure of the angle rotation a of the rotary component 3; the operation and control unit 12 receives the coil signals 3032788 9 Ci from the measurement value sensor 14, 16 and normalizes the different coil signals Ci of the different measurement value sensors 14, 16. The embodiments of the sensor device 1 according to the invention can be used for example as a steering angle sensor for determining the steering angle of a vehicle or as an angle of rotation sensor for determining the position of the vehicle pedal. . As furthermore shown in FIGS. 1 and 2, the measuring value generators 20, 30 are each formed as an annular disc provided with a ring gear 24, 34. These rings are driven by a main ring gear 5 by the rotary component 3. The main ring gear 5 of the embodiment is engaged on the rotary component 3 to which it is integrally connected. In the embodiment in the form of a steering angle sensor, the rotating component 3 corresponds to the steering column of the vehicle. The detection areas 26, 36 each have the shape of a ring ring segment in the outer edge area of the respective annular disk and its zones enclose an angle of at least 180 °. In the exemplary embodiment presented, the protection pads 26, 36 of the measurement value generators 20, 30 each include an angle of about 190 ° to reduce the marginal effects of the generated eddy currents. The detection areas 26, 36 are for example made in the form of metal inserts. The main ring gear 5 coupled to the rotating component 3 is provided with a predefined number of 25 dies. The number of teeth of the toothed crowns 5, 24, 34 differs. Thus, the main ring gear 5, for example has 42 teeth, the first ring gear 24 has for example 26 teeth and the second ring gear 34 has for example 28 teeth. As furthermore appears in FIG. 1, the rotational movement α of the rotary component 3 is transmitted to the two measurement value generators 20, 30. As can be seen in FIG. 1, the measurement value sensors 14, 16 of the embodiment shown each have three detection coils Li, L2, L3, L4, L5, L6 in the form of segments of circular rings regularly distributed at the periphery of a circle 35 on a circuit support 10 common. The operation and operation unit 12 can operate simultaneously or in a predefined order the detection coils Li, L2, L3, L4, L5, L6 of the measuring value sensors 14, 16. Moreover, the operation and control unit 12 operates a reference coil LRef installed on the coil support 10 for the differential measurements with the detection coils Li, L2, L3, L4, L5, L6 of the measurement value sensors 14, 16. The detection coils L1, L2, L3, L4, L5, L6 of the measurement value sensors 14, 16. The detection coils Li, L2, L3, L4, L5, L6 of the measurement value sensors 14, 16 as well as the reference coil LRef may be distributed in several layers of the circuit support 10 to increase the inductance and facilitate operation. The electrical connections between the coils Li, L2, L3, L4, L5, L6, LRef and the operation and control unit 12 have not been represented for reasons of readability. In the exemplary embodiment shown, the first measurement value sensor 14 has a first detection coil Li, a second detection coil L2 and a third detection coil L3. The first measurement value sensor 14 generates a first angle information ai of a first periodicity. The second measurement value sensor 16 comprises in the embodiment shown a fourth sense coil L4, a fifth sense coil L5 and a sixth sense coil L6. The second measurement value sensor 16 generates the second angular information G2 with a second periodicity. Reference coil LRef and sensing coils Li, L2, L3, L4, L5, L6 all have similar dimensions. Thus, the three detection coils Li, L2, L3 of the first measurement value sensor 14, the three detection coils L4, L5, L6 of the second measurement value sensor 30 each have a width of approximately 90. ° and a difference of about 30 °. The reference coil LRef also has a width corresponding to about 90 °.

As further shown in FIG. 1, the circuit support 10 and the measurement value sensors 14, 16 are installed relative to one another so that the first measurement value generator 20 covers with its marginal area. the detection coils Li, L2, L3 of the first measurement value sensor 14, at least a partial coverage and that the second value sensor 30 covers with its outer marginal zone, at least partially the detection coils L4, L5, L6 of the second measurement value sensor 16. In the embodiment shown, the angle of rotation of the rotary component 3 is captured using the effect of the currents. of Foucault. As is further apparent from FIGS. 1 and 2, the disk-shaped base body of the measuring value generators 10, 20 has a detection area 26, 36 in the form of an electrically conductive metal surface. The measuring value sensors 30, 40 each have three surface detection coils Li, L2, L3, L4, L5, L6 which are installed on the circuit board 10 at a predefined spacing above or below the measuring value generator 10, 20 respectively. Thus, the electrically conductive sensing areas 26, 36 influence the effect of the eddy currents, modifying the inductance of the corresponding sensing coils Li, L2, L3, L4, L5, L6, depending on the degree of overlap. The eddy current effect modifies the inductance of the corresponding detection coils Li, L2, L3, L4, L5, L6, so that the value of the inductance can unequivocally give the position of the corresponding measurement value generator. 10, 20 in a range between 0 and 360 °. Thus, the angle of rotation sensors 7, 9 convert the respective angular information to 1, a2 in the range between 0 and 360 ° into a corresponding inductance signal which is a function of the position of the value generator of measure 10, corresponding 20.

The control operating unit 12 generates or calculates the coil signals Ci from the signals of the inductances which are respectively associated with a detection coil Li, L2, L3, L4, L5, L6. As is also apparent from FIGS. 3-6, the inductance of the different sense coils Li, L2, L3, L4, L5, L6 depends on the overlap angle (pi, cp 2, cp 3, ( 1) 4, (1) 5, (1) 6 of the different detection coils Li, L2, L3, L4, L5, L6 with the corresponding detection areas 26, 36 of the measurement value generators 20, 30. The preferred embodiment of the present invention uses for the angular sensors 7, 9 in each case a detection area 26, 36 which corresponds to an angle of at least 180 ° and thus covers at least the half-surface of the ring of the measuring value generator 20, 30 in conjunction with the detection coils Li, L2, L3, L4, L5, L6, each of which corresponds to an angle of 90 °. 36 in comparison with the detection coils Li, L2, L3, L4, L5, L6 cover a double surface At first sight in this embodiment redundancy is lost at the input In certain angular positions, the operating and control unit 12 can only operate on one coil signal. For the angular positions shown in FIGS. 3 to 6, the two angular sensors 7, 9 are similarly used so that for the following description reference is made to the first angular value sensor 7. In the first angular position shown in FIG. In FIG. 3, the detection range 26 of the first measurement value generator 20 completely covers the first detection coil Li of the first measurement value sensor 14. In addition, the detection range 26 of the first generator Each measurement value 20 partially covers the second and the third detection coils L2, L3 of the first measurement value sensor 14. This is why the first overlap angle cp1 in the first angular position represented by a value of 90 °. The second coverage angle cp2 and the third coverage angle (p3 each have a value of 15 ° in the same angular position shown.) As the first detection coil Li is fully open in the first angular position shown, even for small angular variations, the inductance of the first detection coil Li will not change so that the first current information ai is calculated from the inductance formation of the second detection coil L2 and / or the third detection coil Thus, the first angular information 30 a 1 can be calculated for example as an average value from the inductance information of the second and third detection coils L2, L3. the first fully covered Li detection coil can be used to normalize the gap.In the second angular position shown in FIG. The first measuring coil Li of the first measuring value sensor 14 is also completely covered by the first measuring coil 3032788 13. In addition, the detection area 26 of the first measurement value generator 20 partially covers the second detection coil L2 of the first measurement value sensor 14. The third detection coil L3 is not covered at all. For this reason, the first angle of overlap (pi for the second angular position shown is 90 °), the second angle of overlap cp2 in the second angular position shown is 30 °, and the third angle of overlap cp3 is As the first detection coil Li is completely covered in the second angular position shown and the third detection coil L3 is absolutely not covered, the first actual angular information has thus obtained. It can be calculated only from the inductance information of the second sensing coil L 2. The inductance information of the first fully covered sensing coil Li can be used to normalize deviations. With the angular position shown in FIG. 5, the first detection area 26 of the first measurement value generator 20 covers the first detection coil Li and the second one. L2 detection coil coil of the first measurement value sensor 14 each time partially. The third L3 sense coil is not covered at all. For this reason, the first angle of overlap (p1 for the third angular position shown is 80 °), the second overlap angle cp2 for the third position is 70 ° and the third angle is (p3 has a value of 0 °.) Since the third detection coil L3 of the third angular position presented is absolutely not covered, the first current angular information has 1 is calculated from the inductance information of the first detection coil Li and / or second detection coil L2 In the fourth angular position shown in FIG. 6, the detection area 26 of the first measurement value generator 20 partially covers the first detection coil Li of the first measuring value sensor 14 and completely the second detection coil L2 of the first measurement value sensor 14. The third detection coil L3 is This is why the first angle of overlap (pi of the second angular position shown has a value of 45 °. The second overlap angle cp2 of the second angular position shown has a value of 90 ° and the third overlap angle cp3 has a value of 0 °. Since the second detection coil L2 for the fourth angular position shown is completely covered and the third detection coil L3 is absolutely not covered, the first angular information current a 1 can be calculated only from the information the inductance 10 of the first detection coil Li. The inductance information of the second fully covered detection coil L2 can not be used to standardize the gap. FIGS. 7 to 9 show examples of such coil signals C1, C2, C3 for the detection coils Li, L2, L3 of the first measurement value sensor 14. FIG. 7 shows the three coil signals C1, C2 , C3 generated by the three detection coils Li, L2, L3 of the first angular sensor 7 in the form of characteristic curves of raw values; the range L shown on the left corresponds to the left rotation of the rotary component 3; the range R represented on the right corresponds to the rotation to the right of the rotary component 3. FIGS. 8 and 9 show each of the DI, DII ranges with higher resolution of the diagrams of the characteristic curves of FIG. 7. The inductance is determined by the operation and control unit 12 for example by a frequency measurement of an oscillating circuit which comprises the respective detection coils Li, L2, L3, L4, L5, L6 or by a direct measurement of the inductance using the imaginary part of the reactance of the oscillating circuit for a fixed frequency or by mixing with a reference frequency. The operation and control unit 12 calculates the detected inductance signal inversely according to the overlap angle cpi, cp2, (p3, (1) 4, (1) 5, cp6 with a detection range 26, 36. It would be expected to have raw signal levels C1, C2, C3 for each full overlap of each of the sense coils Li, L2, L3, since the detection range 26 is much larger than the coil Li, L2, L3, respectively, as shown in FIGS. 7 to 9, the raw signals C1, C2, C3 each have a slope, this slope is probably generated by the position of the detection range 26 in FIGS. the first measurement value generator 20 and this range is not exactly parallel to the plane of the circuit board or to the plane of the coil.To compensate for the mounting position of the distance variations, the unit of operation and control 12 calculates for each coil signal Ci a first normal coil signal C lnorm, from the current value Ci a of the coil signal whose minimum value Ci min whose maximum value Ci max can be calculated. In the exemplary embodiment presented, the operation and control unit 12 calculates the first normalized coil signal Ci lnorm according to equation 1 as a ratio of the first difference between the current value Ci a and the minimum value Ci min corresponding coil signal Ci and a second difference obtained from the maximum value Ci max and the minimum value Ci min of the corresponding coil signal Ci. Ci lnorm - Ci min Ci_ max- Ci_ min) (1) For this, the minimum value Ci min and the maximum value Ci max of the coil signal (C) are first determined and stored for a rotation of the value generator. This first normalization makes it possible at least partially to compensate for inaccuracies in the geometry of the coil on the circuit board 10 resulting for example from the etching, from the supply line, from the return line, or other, capacitors and gate travel times.

First, the operating and control unit 12 generates for each first normalized coil signal Ci lnorm of the respective measuring value sensor 14, 16, a second normalized coil signal Ci 2norm which, according to the Equation 2 given below is formed from the first normalized coil signal Ci lnorm and the sum signal, computed with at least two normalized normal first signal signals Ci lnorm, Ck_lnorm of each of the value sensors. In the exemplary embodiment presented, the operating and control unit 12 compares the normalized coil signals Ci norm of each sensor of the measuring device 14, 16. Ci 2nonn = (Ci -1norm Ci_lnorm + Ck_lnorm) measurement value 14, 16 and forms the sum signal for the second normalized coil signal Ci 2norm from the first normalized coil signal Ci lnorm of the corresponding detection coil Li and the first normalized coil signal Ck_lnorm of the other reel of detec Lk, which is the largest value. This second normalization makes it possible to compensate at least partially the distance variations between the detection range 26, 36 and the detection coils Li, L2, L3, L4, L5, L6. For the first angular position described in connection with FIG. 3, the operation and control unit 12 forms the sum signal for the second normalized coil signal C 1 2norm of the first detection coil Li from the first normalized coil signal C 1 lnorm of the first detection coil Li and the first normalized coil signal C2 lnorm of the second detection coil L2 or the first normalized coil signal C3 lnorm of the third detection coil L3 because the angle the second detection coil 26, the second detection coil L2, L3, for the detection area 26 has the same dimension, and the second normalized coil signal C2 2norm of the second detection coil L2 The operation and control unit 12 forms the sum signal from the first normalized coil signal C2 lnorm of the second detection coil L2 and the first normalized coil signal C 1 lnorm of the first detection coil Li because the overlap angle (pi of the first coil of the first detection coil Li by the detection area 26 is the largest. For the second normalized coil signal C2 2norm of the third sense coil L3, the command and control unit 12 forms the sum signal from the first normalized coil signal C2 lnorm of the third detection coil L3 and the first normalized coil signal C 1 lnorm of the first detection coil Li because the overlap angle (pi of the first detection coil Li by the detection area 26 is the largest. For the second angular position described above in connection with FIG. 4, the operation and control unit 12 forms the sum signal for the second normalized coil signal C 1 C 2 2 of the first detection coil Li to from the first normalized coil signal C 1 lnorm of the first detection coil L 1 and the first normalized coil signal C2 lnorm of the second detection coil L2 because the second overlap angle cp2 of the second detection coil L2 through detection range 26 is greater than the third overlap angle (p3 of third detection coil L3 by detection range 26. For the second normalized coil signal C2 2norm of second detection coil L2, the operation and control unit 12 forms the sum signal from the first normalized coil signal C2 lnorm of the second sensing coil L2 and the first normalized coil signal C 1 lnorm of the first sensing coil Li because the overlap angle (pi of the first detection coil Li by the detection area 26 is the largest. For the second normalized coil signal C2 2norm of the third sense coil L3, the operation and control unit 12 forms the sum signal from the first normalized coil signal C2 lnorm of the third coil L3. and the first normalized coil signal C 1 lnorm of the first detection coil Li because the overlap angle (pi of the first detection coil Li by the detection area 26 is the largest.

For the third angular position described in connection with FIG. 5, the operation and control unit 12 forms the sum signal for the second normalized coil signal C 1 2norm of the first detection coil Li from the first normalized coil signal C 1 lnorm of the first sense coil Li and from the first normalized coil signal C2 1norm of the second sense coil 3032788 18 because the second overlap angle cp2 of the second sense coil L2 by the detection range 26 is greater than the third overlap angle cp3 of the third detection coil L3 by the detection area 26. For the second normalized coil signal C2 2norm of the second detection coil L2, the unit Operating and control circuit 12 forms the standard signal from the first normalized coil signal C2 lnorm of the second detection coil L2 and the first normalized coil signal C 1 lnorm d e the first detection coil Li because the overlap angle (pi of the first detection coil Li by the detection area 26 is the largest. For the second normalized coil signal C2 2norm of the third detection coil L3, the operation and control unit 12 forms the sum signal from the first normalized coil signal C2 lnorm of the third detection coil L3 and of the first normalized coil signal C 1 lnorm of the first detection coil Li because the overlap angle cp1 of the first detection coil Li by the detection area 26 is the largest. For the fourth angular position described above in connection with FIG. 6, the operation and control unit 12 forms the sum signal for the second normalized coil signal C 1 2norm of the first detection coil Li from of the first normalized coil signal C 1 lnorm of the first detection coil Li and the first normalized coil signal C2 lnorm of the second detection coil L2 because the second overlap angle cp2 of the second detection coil L2 by the detection range 26 is the largest. For the second normalized coil signal C2 2norm of the second detection coil L2, the operation and control unit 12 forms the sum signal from the first normalized coil signal C2 lnorm of the second detection coil L2 and of the first normalized coil signal C 1 lnorm of the first detecting coil Li because the overlap angle (pi of the first detection coil Li in the detection area 26 is greater than the third recovery angle ( p3 of the third detection coil L3 by the detection area 26. For the second normalized coil signal C2 2norm of the third detection coil L3, the operating unit 3032788 and control unit 12 forms the sum signal. from the first normalized coil signal C2 lnorm of the third detection coil L3 and the first normalized coil signal Cl lnorm of the second detection coil L2 because the overlap angle cp2 of the second coil L2 detection by the detection range 26 is the largest. FIGS. 10 to 12 each show the diagram of the characteristic curves of the second normalized coil signal Cl 2norm, C2 2norm, C3 2norm of the detection coils Li, L2, L3 of the first measurement value sensor 20; FIG. 12 shows a range 10 of higher resolution DV of the characteristic curve diagram of FIG. 11. As is also apparent in FIGS. 10 to 12, for each angular sensor 7, 9 there are several ranges among which For example, five characteristic ranges K1, K2, K3, K4, K5 are shown in FIG. 12. For these ranges K1, K2, K3, K4, K5, it is possible to balance the corresponding measurement curves of the second coil signal. normalized Cl 2norm, C2 2norm, C3 2norm by a simple adaptation curve. As further shown in FIG. 13, in the case of the exemplary embodiment shown, the measurement curve M1 is adapted to an adaptation curve A 1 whose trace corresponds to a polynomial of the second degree. It is also possible to apply a more complex adaptation method. Fig. 13 shows a segment with normalized values as x-value and y-values for the associated angle which represents the current rotation angle of the rotating component. The matching curve corrects the geometric position of the detection areas 26, 36. Figure 14 shows the characteristic curves entered and recalculated for the two angle information a 1, a 2. In addition, Fig. 14 shows the vernier configuration in which the characteristic curve a2 represents the second angular information of the second measurement value generator 30 whose second input ring 34 has more teeth than the first one. toothed ring 24 of the first measuring value generator 20 and thus rotates more slowly. From the distance of the two characteristic curves the total number of rotations can be calculated. The range L shown on the left corresponds to a rotation on the left of the rotary component 3 and the range R shown on the right corresponds to a rotation on the right of the rotary component 3.

5 3032788 21 NOMENCLATURE OF MAIN ELEMENTS 1 Sensor device 3 Rotary component 5 5 Main toothed ring 7 First angular sensor 9 Second angular sensor 10 Circuit holder 12 Control and operating unit 10 14 Measuring value sensor 16 Value sensor 20, 30 Measuring value generator 24, 34 Ring gear 26, 36 Range of detection 15

Claims (3)

CLAIMS 1 °) Sensor device (1) for gripping angles of rotation (a) of a rotating component (3) of a vehicle, the rotary component (3) being coupled to two measurement value generators (20, 30) ), the first measurement value generator (20) and the first measurement value sensor (14) forming the first angular sensor (7) which generates a first angular information (ai) dependent on the rotational movement of the first rotary component ( 3), the second measurement value generator (30) and the second measurement value sensor (16) forming the second angular sensor (9) which generates a second angular information (a2) from the rotational movement of the rotary component (3), and the current rotation angle (a) of the rotary component (3) is determined from the first angular information (ai) and the second angular information (a2), characterized in that the measuring value generators (20, 30) each have a p electrically conductive detection circuit (26, 36) and the measuring value sensors (14, 16) each have a plurality of detection coils (Li, L2, L3, L4, L5, L6), the detection range ( 26, 36) of each measuring value generator (20, 30) influences the inductance of the corresponding sensing coils (Li, L2, L3, L4, L5, L6) of the respective measuring value sensor (14, 16). so that the corresponding coil signal of at least one sensing coil (Li, L2, L3, L4, L5, L6) periodically varies by the rotational movement of the rotating component 3 and is used as a measure of the rotation angle (a) of the rotary component (3), an operation and control unit (12) receiving the coil signals (Ci) of the measurement value sensors (14, 16) and normalizing the different coil signals (Ci) respective measuring value sensors (14, 16). Sensor device according to Claim 1, characterized in that the operating and control unit (12) generates a first normalized coil signal (Ci lnorm) for each coil signal (Ci). first signal being calculated from the current value (Ci a) of the coil signal, its minimum value (Ci min) and its maximum value (Ci max). Sensor device according to Claim 2, characterized in that the operating and control unit (12) calculates the first normalized coil signal (Ci lnorm) as the ratio of the first difference of the actual value ( Ci a) and the minimum value (Ci min) of the corresponding coil signal (Ci) and a second difference of the maximum value (Ci-max) and the minimum value (Ci min) of the corresponding coil signal ( This). 4. Sensor device according to claim 2 or 3, characterized in that the minimum value (Ci min) and the maximum value (Ci max) of the corresponding coil signal (Ci) are determined and stored beforehand. for a rotation of the measuring value generator (20, 30). Sensor device according to claim 2, characterized in that the operating and control unit (12) generates for each first normalized coil signal (Ci lnorm) of the measuring value sensor (14, 16). ), a second normalized coil signal (Ci 2norm) formed of the first normalized coil signal (Ci lnorm) and a sum signal composed of at least two normalized first coil signals (Ci lnorm, Ck lnorm) of respective measuring value sensor (14, 16). Sensor device according to claim 5, characterized in that the operating and control unit (12) compares the normalized sensor signals (Ci norm) of the measuring value sensor (14, 16). ) resets and forms the sum signal for the second normalized coil signal (Ci 2norm) from the largest of the first normalized coil signal (Ci lnorm) of the corresponding sensing coil (Li) and the first normalized coil signal (Ck lnorm) of the other 5 detection coils (Lk). Sensor device according to Claim 1, characterized in that the measuring value generator (20, 30) is an annular disk with a ring gear (24, 34) driven by the rotary component (3) by a main toothed crown (5), the detection areas (26, 36) being in the form of a circular ring segment in the region of the outer edge of the respective annular disk and corresponding to an angle of at least 180 °. 8 °) Sensor device according to claim 1, characterized in that the measuring value sensors (14, 16) each have three detection coils (Li, L2, L3, L4, L5, L6) in the form of segments of circular rings regularly distributed at the periphery of a circle on a common circuit support (10) and respectively corresponding to an angle of 90 °. Sensor device according to Claim 8, characterized in that the measuring value sensors (14, 16) are arranged in relation to one another on the circuit carrier (10) and the measuring value generators. (20, 30) for the first measurement value generator (20) to cover the detection coils (Li, L2, L3) of the first measurement value sensor (14) with its outer edge area and the second measuring value generator (30) covers with its outer edge area, the detection coils (L4, L5, L6) of the second measurement value sensor (16). Sensor device according to claim 8, characterized in that the first measurement value sensor (14) generates the first angular information (a1) based on the number of teeth of a first ring. tooth (24) of the first measurement value generator (20) with a first periodicity and the second measurement value sensor (16) generates the second angular information (a2) based on the number of teeth of the second ring gear (34) of the second measurement value generator (30) with the second periodicity. 10