Abstract: A hydraulic excavator includes: a multijoint type front implement that is configured by coupling a plurality of driven members including a bucket; inertial measurement units that detect posture information about the plurality of driven members; and a calibration value computing section that computes calibration parameters used in calibration of detection results of the inertial measurement units; and a work position computing section that computes a relative position of the bucket to the machine body on the basis of the detection results of the inertial measurement units and the computation result of the calibration value computing section, and the calibration value computing section computes the calibration parameters on the basis of the detection results of the inertial measurement units in a plurality of postures of the front implement in which a reference point set on any of the plurality of driven members in advance matches a reference position.

Abstract: An area limit control part as a control section outputs a requested boost pilot pressure for driving a control valve, based upon a pilot pressure in accordance with an operating amount of an operating lever and a posture signal of a posture sensor. A drive permission determination part determines whether or not a drive of a hydraulic actuator is permitted based upon the pilot pressure in accordance with the operating amount of the operating lever. A pilot pressure selecting part selects the requested boost pilot pressure from the area limit control part in such a manner as to drive the control valve with the requested boost pilot pressure to the hydraulic actuator the drive of which is permitted, and not to drive the control valve to the hydraulic actuator the drive of which is not permitted.

Abstract: A hydraulic excavator includes: a multijoint type front implement that is configured by coupling a plurality of driven members including a bucket; inertial measurement units that detect posture information about the plurality of driven members; and a calibration value computing section that computes calibration parameters used in calibration of detection results of the inertial measurement units; and a work position computing section that computes a relative position of the bucket to the machine body on the basis of the detection results of the inertial measurement units and the computation result of the calibration value computing section, and the calibration value computing section computes the calibration parameters on the basis of the detection results of the inertial measurement units in a plurality of postures of the front implement in which a reference point set on any of the plurality of driven members in advance matches a reference position.

Abstract: An area limit control part as a control section outputs a requested boost pilot pressure for driving a control valve, based upon a pilot pressure in accordance with an operating amount of an operating lever and a posture signal of a posture sensor. A drive permission determination part determines whether or not a drive of a hydraulic actuator is permitted based upon the pilot pressure in accordance with the operating amount of the operating lever. A pilot pressure selecting part selects the requested boost pilot pressure from the area limit control part in such a manner as to drive the control valve with the requested boost pilot pressure to the hydraulic actuator the drive of which is permitted, and not to drive the control valve to the hydraulic actuator the drive of which is not permitted.

Abstract: A management server (32) is provided in a position away from a hydraulic excavator (1). An operator ID and a vehicle body ID and output characteristic information are stored in a memory device (32A) in the management server (32) in such a manner as to be associated with operability desired by each of operators. The management server (32) extracts the output characteristic information in conformity with the operability desired by an operator from the operator ID and the vehicle body ID, and outputs the extracted output characteristic information to the hydraulic excavator (1). A control device (17) in the hydraulic excavator (1) changes the output characteristics of hydraulic actuators (4D), (4E), (4F), (2B), (3B) based upon the output characteristic information stored in a memory (19).

Abstract: A management server (32) is provided in a position away from a hydraulic excavator (1). An operator ID and a vehicle body ID and output characteristic information are stored in a memory device (32A) in the management server (32) in such a manner as to be associated with operability desired by each of operators. The management server (32) extracts the output characteristic information in conformity with the operability desired by an operator from the operator ID and the vehicle body ID, and outputs the extracted output characteristic information to the hydraulic excavator (1). A control device (17) in the hydraulic excavator (1) changes the output characteristics of hydraulic actuators (4D), (4E), (4F), (2B), (3B) based upon the output characteristic information stored in a memory (19).