Magnetic force sensor sensing magnetic flux to calculate forces

摘要

There is provided a magnetic force sensor including: an action unit elastically supported by a supporting member; a magnetic-flux generating source including two or more magnets which are disposed so that a polarity of each of the magnetic-pole faces of the magnets is opposite to a polarity of a corresponding one of the magnetic-pole faces of the adjacent magnets in a particular direction; first magnetoelectric transducers that are individually provided at positions, the positions being positions at which the first magnetoelectric transducers oppose the magnetic-pole faces of the magnets in the action unit; and a second magnetoelectric transducer provided between the first magnetoelectric transducers. Vertical-direction components of a force are detected on the basis of outputs of the first magnetoelectric transducers, and a horizontal-direction component of the force is detected on the basis of an output of the second magnetoelectric transducer.

主权项

1. A force sensor that detects a force by detecting magnetic flux density which changes in accordance with relative displacement between an action unit that receives the force and a magnetic-flux generating source, the action unit being displaceable by the force, the force sensor comprising:
the action unit elastically supported by a supporting member; the magnetic-flux generating source including two or more magnets which are disposed so that a polarity of each of the magnetic-pole faces of the magnets is opposite to a polarity of a corresponding one of the magnetic-pole faces of the adjacent magnets; first magnetoelectric transducers that are individually provided at positions, the positions being positions at which the first magnetoelectric transducers oppose the magnetic-pole faces of the two or more magnets in the action unit; and a second magnetoelectric transducer that is provided between the first magnetoelectric transducers,wherein the force in a vertical direction is calculated by detecting a vertical-direction component of the magnetic flux density on the basis of outputs of the first magnetoelectric transducers, and the force in a horizontal direction is calculated by detecting a horizontal-direction component of the magnetic flux density on the basis of an output of the second magnetoelectric transducer.