METHOD FOR CORRECTING POSITION READING VALUE OF POSITION DETECTOR

Title:

METHOD FOR CORRECTING POSITION READING VALUE OF POSITION DETECTOR

Document Type and Number:

Japanese Patent JP2023002689

Kind Code:

A

Abstract:

To provide a method for correcting a position reading value of a position detector for detecting the position of a rotary joint of a joint structure.SOLUTION: A method for correcting a position reading value of a position detector that includes a disk having magnetic rings including magnetic pole pairs, and a magnetic sensor assembly having a magnetic sensor array for detecting the magnetic pole pairs of the magnetic rings. The method includes the steps of: for each magnetic pole pair of the magnetic ring, obtaining a calibration magnetic pole pair position reading value using the magnetic sensor array; generating a magnetic pole pair correction function by comparing a calibration magnetic pole pair position reading value 73 with a model magnetic pole pair position reading value 72; generating the average magnetic pole pair correction function of the magnetic ring by averaging the magnetic pole pair correction functions of the magnetic pole pairs of the magnetic rings; obtaining a position reading value including a plurality of magnetic pole pair position reading values using the magnetic sensor array; and generating a correction position reading value by subtracting the average magnetic pole pair correction function from each magnetic pole pair position reading value.SELECTED DRAWING: Figure 11

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Inventors:

Mottram, Edward John
Roberts, Paul Christopher

Application Number:

JP2022168154A

Publication Date:

January 10, 2023

Filing Date:

October 20, 2022

Export Citation:

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Assignee:

CMR SURGICAL LIMITED

International Classes:

G01D5/244; G01D5/245

Attorney, Agent or Firm:

Kasai Nakane International Patent Office
Mie Nakane
Kasai Yoshitaka

Previous Patent: JPWO2023002688

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