| 摘要 |
PURPOSE: A method and an apparatus for timed measurement of a voltage across a device in a charging circuit of a piezoelectric element are provided, which measures voltages in the devices in the charging circuit of the piezoelectric device using a simple measurement and time control concept, and thus corrects an aging phenomena of an actuator and controls a reference voltage of the actuator. CONSTITUTION: According to the method for measuring a voltage across a device in a charging circuit of a piezoelectric element, the voltage across the device is sensed, and the sensed voltage is read at a preestablished time by being synchronized to an injection operation of at least one piezoelectric element. The above device is a buffer capacitor, and the preestablished time is a preestablished time offset before and after each charging operation or discharging operation of the injection operation. The charging operation or the discharging operation starts in response to each strobe pulse, and the preestablished time offset is related to each strobe pulse.
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