Inductive rotary encoder

By introducing a magnetic field sensor and processor into an inductive rotary encoder, the relative arrangement of the first and second components is measured using the magnetic field generated by the excitation coil. This solves the problem of difficulty in measuring the degrees of freedom outside the rotation axis in the prior art, and improves the measurement accuracy and signal strength.

CN122422718APending Publication Date: 2026-07-17RENISHAW PLC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
RENISHAW PLC
Filing Date
2024-11-06
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing inductive rotary encoders have difficulty effectively measuring the relative arrangement information of the first and second components in degrees of freedom other than around the axis of rotation.

Method used

By introducing a magnetic field sensor and processor into an inductive rotary encoder, the magnetic field generated by the excitation coil is used to measure the relative arrangement of the first and second components in degrees of freedom other than the rotation axis. Combined with a magnetic flux enhancer, the signal strength and system sensitivity are improved.

Benefits of technology

It enables precise relative arrangement measurement of the first and second components in degrees of freedom other than the axis of rotation, improving accuracy and sensitivity during installation and operation.

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Abstract

一种设备包括电感式旋转编码器,该电感式旋转编码器包括可绕旋转轴线相对旋转的第一构件和第二构件,该第一构件具有至少一个标尺刻度道,并且该第二构件具有用于产生由该至少一个标尺刻度道操纵的磁场的励磁线圈,该第二构件还具有用于感测该磁场的接收器线圈,该第一构件和该第二构件绕该旋转轴线的相对旋转位置可以经由该磁场测量。该第一构件和 / 或该第二构件包括用于感测由该励磁线圈或另一个励磁线圈产生的磁场的至少一个磁场传感器,并且该设备包括用于从所述至少一个磁场传感器确定关于该第一构件和该第二构件在除了绕该旋转轴线之外的自由度上的相对布置的信息的器件。
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