| 摘要 |
A surgical instrument (10), comprising a housing (110); an elongated shaft (140) extending distally from the housing (110) and defining a first longitudinal axis;
a firing rod (220) disposed at least partially within the elongated shaft (140); a drive mechanism (200,210) disposed at least partially within the housing, the drive mechanism (200,210) being in mechanical cooperation with the firing rod (220); a motion sensor (251) that senses changes in an electric field between the firing rod (220) and the elongated shaft (140); a signal generator that generates a pulse signal including a plurality of pulses, wherein widths of the plurality of pulses vary with the changes in the electric field between the firing rod (220) and the elongated shaft (140); a measurement unit (470) that measures the widths of the plurality of pulses; and a data processor (474) that determines a parameter of motion of the firing rod (220) based on the measured widths of the plurality of pulses. |
