Method for increasing the positioning accuracy of an element which is movably arranged relative to a stator
First Claim
1. A method for increasing the positioning accuracy of an element (13) which is movably arranged relative to a stator (10), with at least two sensors (11, 12) being provided in the stator (10), a first sensor (11) and a second sensor (12), which are arranged at a distance (a) from one another in the stator (10), with respect to the movement direction (P) of the movably arranged element (13), and with the relative to the stator (10) movably arranged element (13) being provided with encoders (130) which can move together with the movable element (13) and, when the element (13) carries out a movement relative to the stator (10), firstly produce a sensor signal (S11) in the first sensor (11) and then, as the movement of the element progresses, produce a sensor signal (S12) in the second sensor (12),wherein, first of all, in a calibration run, the movable element (13) is moved over the entire possible range of movement and, during this movement, the sensor signals (S11, S12) of the first sensor (11) and of the second sensor (12) as well as the associated nominal positions of the movable element (13) are detected, wherein the spatial distance (A) is then determined which corresponds to two sensor signals (S11, S12), which are of equal magnitude, follow one another and are caused by the same encoder, of the first sensor (11) and of the second sensor (12), and wherein the error (F) of the nominal position of the movable element is then determined from the spatial distance (A) determined in this way, from the actual distance between the sensors (a) and from the associated nominal positions, and is taken into account in the positioning of the movable element (13).
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Accused Products
Abstract
The invention relates to a method for increasing the positioning accuracy of an element (13) which is movably arranged relative to a stator (10). At least two sensors (11, 12) are provided in the stator (10), a first sensor (11) and a second sensor (12), which are arranged at a distance (a) from one another in the stator (10), with respect to the movement direction (P) of the movably arranged element (13). The element (13) which is arranged such that it can move relative to the stator (10) is provided with encoders (130) which can move together with the movable element (13) and, when the element (13) carries out a movement relative to the stator (10), firstly produce a sensor signal (S11) in the first sensor (11) and then, as the movement of the element progresses, produce a sensor signal (S12) in the second sensor (12). First of all, in a calibration run, the movable element (13) is moved over the entire possible range of movement. During this movement, the sensor signals (S11, S12) of the first sensor (11) and of the second sensor (12) as well as the associated nominal positions of the movable element (13) are detected. The spatial distance (A) is then determined which corresponds to two sensor signals (S11, S12), which are of equal magnitude, follow one another and are caused by the same encoder, of the first sensor (11) and of the second sensor (12). The error (F) of the nominal position of the movable element is then determined from the spatial distance (A) determined in this way, from the actual distance (a) between the sensors and from the associated nominal positions, and is taken into account in the positioning of the movable element (13).
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Citations
8 Claims
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1. A method for increasing the positioning accuracy of an element (13) which is movably arranged relative to a stator (10), with at least two sensors (11, 12) being provided in the stator (10), a first sensor (11) and a second sensor (12), which are arranged at a distance (a) from one another in the stator (10), with respect to the movement direction (P) of the movably arranged element (13), and with the relative to the stator (10) movably arranged element (13) being provided with encoders (130) which can move together with the movable element (13) and, when the element (13) carries out a movement relative to the stator (10), firstly produce a sensor signal (S11) in the first sensor (11) and then, as the movement of the element progresses, produce a sensor signal (S12) in the second sensor (12),
wherein, first of all, in a calibration run, the movable element (13) is moved over the entire possible range of movement and, during this movement, the sensor signals (S11, S12) of the first sensor (11) and of the second sensor (12) as well as the associated nominal positions of the movable element (13) are detected, wherein the spatial distance (A) is then determined which corresponds to two sensor signals (S11, S12), which are of equal magnitude, follow one another and are caused by the same encoder, of the first sensor (11) and of the second sensor (12), and wherein the error (F) of the nominal position of the movable element is then determined from the spatial distance (A) determined in this way, from the actual distance between the sensors (a) and from the associated nominal positions, and is taken into account in the positioning of the movable element (13).
- 6. An apparatus having a stator (10) and an element (13) movable relative to this stator (10), with at least two sensors (11, 12) being provided in the stator (10), a first sensor (11) and a second sensor (12), which are arranged at a distance (a) from one another in the stator, with respect to the movement direction (P) of the movable element, and with the element (13) movable relative to the stator being provided with encoders (130) which can move together with the movable element (13) and, when the element (13) carries out a movement relative to the stator (10), firstly produce a sensor signal (S11) in the first sensor (11) and then, as the movement of the element progresses, produce a sensor signal (S12) in the second sensor (12), wherein means (14) are provided for detection of the sensor signals (S11, S12) of the first sensor (11) and of the second sensor (12) as well as of the associated nominal positions of the movable element (13), and for determination of the spatial distance (A) which corresponds to two sensor signals (S11, S12), which are of equal magnitude and follow one another, of the first sensor (11) and of the second sensor (12), and wherein means (14) are provided which then determine the error (F) of the nominal position of the movable element (13) from the spatial distance (A) determined in this way, from the actual distance between the sensors (a) and from the associated nominal positions, and take this into account in the positioning of the movable element (13).
Specification