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US 2021/0055359 A1Published application
Measurement of positions, mechanical displacements and rotations and stresses of bodies
OwnerRoman Windlinventor
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OwnerRoman Windlinventor
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The invention concerns a device and a method for measuring the relative position and angles between two bodies to be measured (7, 77). The invention is characterized in that it comprises one or more permanent magnets (6) and in that the position to be measured is determined indirectly via a magnetic field. The magnetic field is detected by one or more magnetic field sensors (3) read by a microchip. A mathematical minimization method is used to calculate back to the position and angles of the permanent magnet system (6) in relation to the magnetic field sensors (3). The energy required to read out the sensors can be obtained from the excitation field of a readout device. The sensor can perform without energy supply and can be read out by means of standard readout devices, such as an NFC-capable mobile telephone.
Method for measuring the distance between two bodies (7, 77), characterized in that at least two magnetic field sensor (3) are mounted on one body (77) and at least one permanent magnet (6) is mounted on another body (7), and at least one component of the magnetic field of at least two sensors (3) are measured (Hmeasurement) and a magnetic field Htheory is calculated, which is generated by the permanent magnet system (6) for a given alignment ymagnet that is comprised that the difference d between the theoretical field Htheory and the measured field Hmeasurement is determined d(ymagnet)=Htheory(ymagnet)−Hmeasurement and the alignment ymagnet of the permanent magnet system (6) is determined in such a way that the mathematical norm of the vector d is minimized and thus the alignment ymagnet of the magnetic system (6) relative to the field sensors (3) is determined.
Method for measuring the alignment ymagnet between two bodies (7, 77), characterized in that at least two magnetic field sensors (3) are mounted on one body (77) and a magnet system consisting of at least one permanent magnet (6) is mounted on another body (7) and the permanent magnets at the positions of the sensors generating a magnetic field Hmeasurement and at least one component of the magnetic field of at least two sensors (3) is measured, characterized in that the orientation of the magnet system ymagnet is determined by first training a machine learning method where for a plurality of alignments ymagnet of the permanent magnet system (6) the expected magnetic field Htheory(ymagnet) is determined at the locations of the sensors and used as training data for the machine learning method and hence the machine learning method can predict for a certain measured field Hmeasurement an approximation of ymagnet.
Device for measuring the distance between two bodies (7, 77), characterized in that at least two magnetic field sensors (3) are mounted on one body (77) and at least two permanent magnets (6) are mounted on another body (7), and this permanent magnet system thus generates a magnetic field which has no rotational symmetry, at least two components of the magnetic field are measured by the magnetic field sensors (3), and based on the measured magnetic field the alignment of body (7) relative to body (77) is determined.
Dependencies are inferred from the claim text.