| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure capable of preventing overflow of both first and second counters 9 and 10 in low-speed rotation and secure resolution of the physical quantity in high-speed rotation in the structure calculating the physical quantity such as load acting on a rotary member using A-phase and B-phase pulse signals Sand S.SOLUTION: An initial phase difference between both pulse signals Sand Sis set to 180°. A computing unit for computing the physical quantity includes the functions of: generating an XOR signal Sof both pulse signals Sand S; measuring a pulse period Tof the A-phase pulse signal using a first reference clock signal; measuring a pulse width Tof an L side of the XOR signal using a second reference clock signal; and calculating the physical quantity using a pulse width ratio T/T. |
