One-dimensional positioning method of motion platform based on linear magnetic steel array

Abstract

The invention discloses a one-dimensional positioning method of a motion platform based on a linear magnetic steel array, which comprises the following steps: placing more than 2 linear Hall sensors in arbitrary and different positions within one or more polar distances on the linear magnetic steel array in the motion direction of the surface of the motion platform in a motion system, determining a magnetic flux density distribution model according to the linear magnetic steel array, determining the mounting positions of the linear Hall sensors and converting into a phase relative to the mass center of the motion platform, recoding magnetic flux density measured values of the linear Hall sensors in the motion process, solving the phase of the mass core of the motion platform in the motion direction by taking the measured values as observed values and taking the magnetic flux density distribution model as a calculation value, and then determining the position of the mass core of the motion platform relative to an initial phase according to the phase, thus realizing the one-dimensional positioning of the motion platform. The invention provides the easy, convenient and robust method for calculating the position of the one-dimensional mass core of the platform for the motion system which contains the linear magnetic steel array.

Description

technical field [0001] The invention relates to a measurement method of a moving part including a linear magnetic steel array, in particular to a measurement method using a linear Hall sensor, which belongs to the technical field of measurement and data processing. Background technique [0002] Linear motor is an electromagnetic device that directly converts electromagnetic energy into linear motion mechanical energy. It has the advantages of simple structure, high positioning accuracy, and fast response speed. It can directly drive the workbench, thus eliminating the gap between the drive motor and the workbench. All the intermediate transmission links of the drive, thus overcoming the shortcomings brought by the transmission link of the traditional drive mode, so it is widely used in many fields such as industrial linear drive, transportation, military equipment and so on. [0003] In the motion system using linear motors, high-precision grating rulers are generally used a...

AI Technical Summary

Problems solved by technology

Although the components used in the above patented technologies have high measurement accuracy, they require more complex circuits and optical equipment and are more expensive.

In the actual movement process, if the Hall sensor is directly used for position measurement, there will be noise in the measurement signal itself and the sampling process, resulting in loss of measurement accuracy.

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