WO2022218835A1 - Procede pour s'adapter aux tolerances d'un systeme comportant un capteur de position et une cible tournante - Google Patents
Procede pour s'adapter aux tolerances d'un systeme comportant un capteur de position et une cible tournante Download PDFInfo
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- WO2022218835A1 WO2022218835A1 PCT/EP2022/059361 EP2022059361W WO2022218835A1 WO 2022218835 A1 WO2022218835 A1 WO 2022218835A1 EP 2022059361 W EP2022059361 W EP 2022059361W WO 2022218835 A1 WO2022218835 A1 WO 2022218835A1
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- rotation
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- singularity
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000001133 acceleration Effects 0.000 claims abstract description 17
- 230000000630 rising effect Effects 0.000 claims description 28
- 230000005355 Hall effect Effects 0.000 claims description 14
- 230000005291 magnetic effect Effects 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 38
- 238000004364 calculation method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/24471—Error correction
- G01D5/24495—Error correction using previous values
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
- G01D18/001—Calibrating encoders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/02—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation
- G01D3/022—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation having an ideal characteristic, map or correction data stored in a digital memory
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/24471—Error correction
- G01D5/2449—Error correction using hard-stored calibration data
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
- G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
Definitions
- the present disclosure relates to a method for adapting to the tolerances of a system comprising a position sensor and a rotating target.
- This disclosure relates more particularly to the field of motors for the automotive industry.
- a more particular use of the proposed method relates to the defluxing of electric motors.
- the measurement which is then carried out then depends, on the one hand, on the mechanical defects of the target and/or, on the other hand, on the inaccuracies of the sensor(s) .
- the purpose of the present disclosure is therefore to provide a method which makes it possible to increase the accuracy of position and/or speed measurement with a position sensor and a rotating target.
- the present disclosure improves the situation and proposes a method for adapting to the tolerances of a system comprising at least one position sensor and a rotating target in which when the target rotates the sensor(s) detects (nt) a predefined singularity on the target at a time T_i.
- the proposed method comprises the following steps:
- ThéoJ T_0 + i/N (T_N - T_0 + ACC), where
- N is the number of singularities considered for one rotation of the rotating target
- ACC is a variable that takes into account the acceleration of the target, corresponding to the following determination: (i - N) * (T_(N+1) - T_N - T_1 + T_0) / 2,
- the rotation R of the target corresponds to a full turn, ie 360°.
- the present disclosure is particularly suited to a method for controlling a brushless direct current electric machine, comprising a rotor and a stator, in which a set of three Hall effect sensors is arranged facing a target presenting at least one pair of magnetic poles and in which each transition from one magnetic pole to another for a sensor takes place at a time TJ.
- this method comprises the following steps:
- N is the number of singularities considered for one rotation of the rotating target
- ACC is a variable that takes into account the acceleration of the target, corresponding to the following determination: (i - N) * (T_(N+1) - T_N - T_1 + T_0) / 2,
- a computer program comprising program code instructions for the execution of all the steps of a method described above when said program is executed on a computer.
- a brushless direct current electric machine comprising a stator comprising windings capable of being subjected to a control voltage, a rotor producing a magnetic field.
- This electric machine comprises three Hall effect sensors facing a target comprising at least one pair of magnetic poles, and said electric machine comprises control means for the implementation of each of the steps of a control method of an electric machine described above.
- This electric machine may advantageously also comprise a fourth Hall effect sensor making it possible to determine a reference position for the rotor of the machine.
- this disclosure also relates to a motor vehicle comprising an electric machine as defined in the preceding paragraphs.
- FIG. 1 schematically shows a first example of sensor and corresponding target.
- FIG. 2 schematically shows a second example with several sensors and a corresponding target.
- FIG. 3 schematically shows the signals emitted by the sensors of figure 2.
- FIG. 4 shows a flowchart of a learning process within the scope of this disclosure.
- FIG. 5 is an illustrative diagram of the present disclosure applied to electric motor control.
- FIG. 1 A person skilled in the art here recognizes a target 2 driven in rotation and a sensor 4 arranged opposite the target to determine, for example, the speed of rotation of the target.
- the target 2 is made of a ferromagnetic material. It is in the form of a disk with a crenellated peripheral surface.
- the protruding shapes are all similar and equally distributed on the periphery of the target 2.
- an angular sector of a protruding shape, or tooth, of the target has the same angle at the center of the target as a sector angle of a hollow placed between two neighboring teeth.
- the sensor 4 is for example an inductive sensor of the variable reluctance sensor type. Such a sensor 4 oriented towards the axis of the target 2 and perpendicular to this axis makes it possible to detect the passage of each of the teeth of the target 2. A space included in an interval of distances depending on the sensor 4 and on the material of the target 2, illustrated in FIG. 1, is provided between the apex of a tooth and a distal end of the sensor 4. Such a sensor 4 is generally designed to detect either the rising edges of the crenelated shape, or the falling edges. Depending on the nature of sensor 4, at each passage of an edge, rising for example, the sensor 4 supplies at a time T_i a signal indicating the passage of an ith rising edge (in the example chosen).
- this formula is in fact very sensitive to irregularities in the geometry of the target and also in the positioning of the sensor.
- the perfect target does not exist, there are necessarily teeth of the target wider than others due to manufacturing tolerances.
- the axis of rotation of target 2 may be very slightly off center with respect to the geometric axis of target 2. All these tolerances have an influence on the T_i measurements.
- the relative position of the sensor 4 with a tooth of the target 2 changes, this can also influence the value of T_i.
- the present disclosure proposes to implement a learning procedure as explained below in order to be able to overcome the manufacturing tolerances of the target and/or the positioning tolerances of the sensor relative to the target.
- the following procedure is implemented when the speed of rotation is relatively high (for example greater than half the maximum speed of rotation). It is then assumed that the rotational speed is high enough for the torque variations not to significantly affect the instantaneous speed variations due to the inertia of the rotating mechanical assembly. Under such conditions, it is proposed to learn the fronts to be taken into account. We assume that these are the rising edges. The same procedure applies of course if we consider the falling edges, or even all the edges. It is estimated here that the speed of rotation is constant or at least that the acceleration or deceleration of the target is limited.
- TthJ T_0 + i/N (T_N - T_0 + ACC) (3) [0046] TthJ corresponds to the instant of passage of an ith rising edge [0047] N is the total number of rising edges
- ACC is a variable which takes into account the acceleration (positive or negative in the event of deceleration) of the target. ACC is given by the following formula:
- ACC (i - N) * (T_(N+1) - T_N - T_1 + T_0) / 2 (4)
- AlphaJ 360 * (TthJ - TJ) / (T_N - T_0) (5)
- TJ is the passing instant of the rising edge i given by sensor 4.
- TthJ is the theoretical value of the passing time of the rising edge i.
- the shift AlphaJ is determined such that the shift AlphaJ) is zero, or in other words, the shift Alpha is determined with respect to the first rising edge considered.
- Figure 4 is a flowchart corresponding to an advantageous implementation of the present disclosure.
- data coming from the sensor 4 make it possible to acquire and store the instants TJ corresponding to a complete rotation plus one tooth of the target.
- a third step 104 carried out only if the conditions of the second step 102 are met, provides for the calculation according to equations (3) and (4) of the theoretical passage times TthJ of the rising edges of the target.
- the next step implements equation (5) to convert the difference between the theoretical time and the measured time into an angular difference alpha_i for each rising edge.
- Alpha_dev(i) Alpha_filt(i) - average (Alpha_filt(1 , ... , N-1)) (6)
- average(Alpha_filt(1,...,N-1)) is an average value of the alpha_filt(i) values for i ranging from 1 to (N-1).
- the value Alpha_dev(i) is then used during the measurements made by the sensor 4 to correct the angular values given by this sensor.
- this edge corresponds to an angular position value of the target which is then corrected with the filtered alpha_dev(i) value. In this way, the manufacturing and assembly tolerance defects of the target 2 can be corrected.
- Figures 2 and 3 illustrate another example of position and speed measurement for a rotating assembly.
- This is a measurement for controlling a brushless electric motor (commonly called “brushless”).
- a brushless electric motor commonly called “brushless”
- It may be for example an electric motor for the propulsion of a vehicle, whether it is a so-called electric vehicle (driven only by one or more electric motor(s)) or else of a so-called hybrid vehicle with at least one electric motor and an internal combustion engine.
- It can also be another type of engine -or electrical system-, for example an integrated starter/alternator.
- Such an electrical system without brushes, comprises for example a rotor 10 with at least one permanent magnet having a south pole S and a north pole N. It is assumed here that the rotor 10 has a single pair of poles but it is possible provide a greater number of pairs of poles without departing from the scope of the present disclosure.
- This motor also comprises a stator with windings which are alternately supplied with Electric power. The position of the rotor 10 determines which winding(s) should be supplied with current.
- Hall effect sensors H1, H2 and H3 between windings of the stator to detect the position of the rotor 10. These sensors are evenly distributed around the rotor. For a rotor with n pairs of poles, the sensors would be evenly distributed over 360 h.
- Figure 3 illustrates the signals supplied by the three Hall effect sensors H 1 , H2 and H3. Each passage of a pole change in front of a sensor results in a rising or falling edge depending on the change of polarity concerned. Given the position of the sensors, six edges are obtained at times T_0 to T_5 as illustrated. Each edge corresponds to a rotation of 36076 or 60° from the previous edge.
- the windings of the stator are supplied with electric current.
- the detection of an edge can directly trigger the supply of a corresponding winding of the stator.
- the windings must be supplied in advance with respect to the detection of an edge resulting from the signals provided by the Hall effect sensors .
- the times T_i corresponding to the edges illustrated in FIG. 3 for T_0 to T_7 are then recorded. From these measurements, it is determined, on the one hand, if the rotational speed of the engine is high enough and, on the other hand, if the variation of this rotational speed (or speed) is included within predetermined limits. Again, you can have a different limit for acceleration than for deceleration.
- Tth_0 T_0
- Tth_6 T_6.
- the measurements made at T_0 and at T_6 are made under similar conditions and for these two measurements the relative position of the sensors and of the target, here the rotor 10, are the same.
- the theoretical passage times correspond to passage through the 60°, 120°, 180°, 240° and 300° positions.
- the time difference between the theoretical values TthJ and the measured transit times TJ correspond to an angular offset alphaj measured with equation (5).
- the values of the angular offsets can be filtered to further increase the precision of the method.
- Figure 5 illustrates an application of motor control from the values defined above.
- TthJ-1)-(TJ-1) corresponds to an angular offset AlphaJ-1.
- the difference TthJ - TJ corresponds to an angular offset Alphaj.
- the speed measurement is made from theoretical measurements.
- TC T_i + (T_i - TJ-1) * (60 + AlphaJ - Phi) / (60 - AlphaJ + AlphaJ-1)
- This command is thus made from the times measured with corrections determined during the learning phase.
- the present disclosure thus makes it possible to increase the precision of a sensor. It makes it possible to compensate for an inaccuracy in a measurement of a sensor and also for the positioning tolerances of a sensor in an assembly with a rotating part.
- the present disclosure is particularly well suited to the control and command of an electric machine, in particular a direct current machine, and more particularly a brushless machine.
- the better precision provided by the present disclosure comes first of all from the fact that the calculations, of speed for example, are not made by taking into account only two time measurements, but by taking into account a greater number of measurements, preferably at least all the measurements made between two measurements corresponding to the same relative position of the sensor with its target. Thus, it is possible to reduce the error made on a measurement by distributing a measurement error over several measurements. The error is thus smaller.
- the learning proposed by the present disclosure makes it possible to take into account the misalignments and the mechanical inaccuracies of the system. It is also possible here to take into account asymmetrical behaviors of a sensor (for example if we measure rising and falling edges with the same sensor). [0099] Learning also makes it possible to take account of inaccuracies concerning the target.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Technology Law (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/283,588 US20240167855A1 (en) | 2021-04-14 | 2022-04-08 | Method for adapting to the tolerances of a system comprising a position sensor and a rotating target |
CN202280028448.7A CN117222866A (zh) | 2021-04-14 | 2022-04-08 | 用于适配包括位置传感器和旋转目标的***的公差的方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FRFR2103849 | 2021-04-14 | ||
FR2103849A FR3121984B1 (fr) | 2021-04-14 | 2021-04-14 | Procédé pour s’adapter aux tolérances d’un système comportant un capteur de position et une cible tournante |
Publications (1)
Publication Number | Publication Date |
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WO2022218835A1 true WO2022218835A1 (fr) | 2022-10-20 |
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ID=75850391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2022/059361 WO2022218835A1 (fr) | 2021-04-14 | 2022-04-08 | Procede pour s'adapter aux tolerances d'un systeme comportant un capteur de position et une cible tournante |
Country Status (4)
Country | Link |
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US (1) | US20240167855A1 (fr) |
CN (1) | CN117222866A (fr) |
FR (1) | FR3121984B1 (fr) |
WO (1) | WO2022218835A1 (fr) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000008475A1 (fr) * | 1998-08-05 | 2000-02-17 | Siemens Aktiengesellschaft | Mecanisme motorise pour leve-glace ou toit ouvrant, pour automobile |
US20040251894A1 (en) * | 2001-12-08 | 2004-12-16 | Scotson Peter Geoffrey | Angular velocity sensor |
FR3064427A1 (fr) * | 2017-03-27 | 2018-09-28 | Valeo Systemes D'essuyage | Moteur electrique, moto-reducteur, systeme d'essuyage et procede de commande associe |
FR3086387A1 (fr) * | 2018-09-24 | 2020-03-27 | Continental Automotive France | Procede de determination de la position d'un vilebrequin de vehicule automobile |
-
2021
- 2021-04-14 FR FR2103849A patent/FR3121984B1/fr active Active
-
2022
- 2022-04-08 WO PCT/EP2022/059361 patent/WO2022218835A1/fr active Application Filing
- 2022-04-08 US US18/283,588 patent/US20240167855A1/en active Pending
- 2022-04-08 CN CN202280028448.7A patent/CN117222866A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000008475A1 (fr) * | 1998-08-05 | 2000-02-17 | Siemens Aktiengesellschaft | Mecanisme motorise pour leve-glace ou toit ouvrant, pour automobile |
US20040251894A1 (en) * | 2001-12-08 | 2004-12-16 | Scotson Peter Geoffrey | Angular velocity sensor |
FR3064427A1 (fr) * | 2017-03-27 | 2018-09-28 | Valeo Systemes D'essuyage | Moteur electrique, moto-reducteur, systeme d'essuyage et procede de commande associe |
FR3086387A1 (fr) * | 2018-09-24 | 2020-03-27 | Continental Automotive France | Procede de determination de la position d'un vilebrequin de vehicule automobile |
Also Published As
Publication number | Publication date |
---|---|
CN117222866A (zh) | 2023-12-12 |
FR3121984A1 (fr) | 2022-10-21 |
US20240167855A1 (en) | 2024-05-23 |
FR3121984B1 (fr) | 2023-04-14 |
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