HYDRAULIC CYLINDER STROKE MOVEMENT CALIBRATION CONTROL DEVICE, AND HYDRAULIC CYLINDER STROKE MOVEMENT CALIBRATION CONTROL METHOD

摘要

This stroke movement calibration control device is provided with: a stroke sensor (10) which is arranged on a hydraulic cylinder and measures the stroke length of said hydraulic cylinder; a rotary encoder (20) and magnetic sensor (20a) which measure the reset reference point to which to reset the measured value of the stroke length as measured by the stroke sensor (10); a stroke end detection processing unit (30a) which detects the stroke end position of the hydraulic cylinder; and a calibration processing unit (30b) which calibrates the measured value of the stroke length if the reset reference point and/or the stroke end position is detected, wherein during device power supply startup, resetting is prohibited until the stroke length has passed the reset reference point.