Patent ID: 11946777
Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. A method for improving accuracy of position detection for measuring, by a position sensor including a coil and a magnetic core that is movable inside the coil, a change in a relative position between the coil and the magnetic core, the method comprising:
applying a generated rectangular wave voltage to the coil;
detecting a voltage corresponding to a current which flow through the coil by the rectangular wave voltage;
acquiring a voltage measurement value Vs obtained by sampling the detected voltage after a predetermined time Td in synchronization with a timing t0 of rising or falling of a waveform of the rectangular wave voltage; and
setting the predetermined time Td such that the voltage measurement value Vs is restricted within a range of 40% or more and 99.999% or less with respect to a maximum value of the rectangular wave voltage when the magnetic core is at a position where an inductance of the coil is minimum.