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

Claim 0:
1. A magnetic sensing system comprising a sensing device that generates an electrical signal according to the strength of a magnetic field that changes in response to the action of an external force and a detection device that detects a physical quantity associated with the action of the external force from a change in the magnetic field based on the electrical signal from the sensing device, wherein
the sensing device comprises a magnetic field generation means that generates a desired measurement magnetic field of different strengths from a site that is displaced by the action of the external force, and a magnetic field measurement means that measures the strength of a surrounding magnetic field including the measurement magnetic field, and
the detection device uses a relational expression stored in advance to specify, on a basis of fluctuations over time in the measurement magnetic field when the measurement magnetic field with different strengths is generated by the magnetic field generation means, a magnetic interference amount corresponding to the strength of an interference magnetic field generated near the magnetic field measurement means separately from the measurement magnetic field, and calculates the physical quantity by removing the influence of the magnetic interference amount.