Patent ID: 11879792
Assignee: XELA ROBOTICS CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. An offset method applied to a system that detects a physical quantity associated with the action of an external force on a basis of a variation in a measurement magnetic field generated from a site that is displaced by the action of the external force, the offset method removing an influence of a magnetic interference amount corresponding to the strength of an interference magnetic field generated nearby and separately from the measurement magnetic field when the physical quantity is detected, comprising:
generating the measurement magnetic field so as to vary in strength over time, measuring the strength over time of a surrounding magnetic field resulting from the interference magnetic field influencing the measurement magnetic field, using a relational expression stored in advance to specify the magnetic interference amount from a result of the measurement and the strength of the measurement magnetic field, and calculating the physical quantity by removing the influence of the magnetic interference amount.